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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2012 Avionic Design GmbH
4 * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
5 */
6
7#include <linux/clk.h>
8#include <linux/debugfs.h>
9#include <linux/delay.h>
10#include <linux/dma-mapping.h>
11#include <linux/iommu.h>
12#include <linux/interconnect.h>
13#include <linux/module.h>
14#include <linux/of.h>
15#include <linux/platform_device.h>
16#include <linux/pm_domain.h>
17#include <linux/pm_opp.h>
18#include <linux/pm_runtime.h>
19#include <linux/reset.h>
20
21#include <soc/tegra/common.h>
22#include <soc/tegra/pmc.h>
23
24#include <drm/drm_atomic.h>
25#include <drm/drm_atomic_helper.h>
26#include <drm/drm_blend.h>
27#include <drm/drm_debugfs.h>
28#include <drm/drm_fourcc.h>
29#include <drm/drm_framebuffer.h>
30#include <drm/drm_vblank.h>
31
32#include "dc.h"
33#include "drm.h"
34#include "gem.h"
35#include "hub.h"
36#include "plane.h"
37
38static void tegra_crtc_atomic_destroy_state(struct drm_crtc *crtc,
39 struct drm_crtc_state *state);
40
41static void tegra_dc_stats_reset(struct tegra_dc_stats *stats)
42{
43 stats->frames = 0;
44 stats->vblank = 0;
45 stats->underflow = 0;
46 stats->overflow = 0;
47}
48
49/* Reads the active copy of a register. */
50static u32 tegra_dc_readl_active(struct tegra_dc *dc, unsigned long offset)
51{
52 u32 value;
53
54 tegra_dc_writel(dc, READ_MUX, DC_CMD_STATE_ACCESS);
55 value = tegra_dc_readl(dc, offset);
56 tegra_dc_writel(dc, 0, DC_CMD_STATE_ACCESS);
57
58 return value;
59}
60
61static inline unsigned int tegra_plane_offset(struct tegra_plane *plane,
62 unsigned int offset)
63{
64 if (offset >= 0x500 && offset <= 0x638) {
65 offset = 0x000 + (offset - 0x500);
66 return plane->offset + offset;
67 }
68
69 if (offset >= 0x700 && offset <= 0x719) {
70 offset = 0x180 + (offset - 0x700);
71 return plane->offset + offset;
72 }
73
74 if (offset >= 0x800 && offset <= 0x839) {
75 offset = 0x1c0 + (offset - 0x800);
76 return plane->offset + offset;
77 }
78
79 dev_WARN(plane->dc->dev, "invalid offset: %x\n", offset);
80
81 return plane->offset + offset;
82}
83
84static inline u32 tegra_plane_readl(struct tegra_plane *plane,
85 unsigned int offset)
86{
87 return tegra_dc_readl(plane->dc, tegra_plane_offset(plane, offset));
88}
89
90static inline void tegra_plane_writel(struct tegra_plane *plane, u32 value,
91 unsigned int offset)
92{
93 tegra_dc_writel(plane->dc, value, tegra_plane_offset(plane, offset));
94}
95
96bool tegra_dc_has_output(struct tegra_dc *dc, struct device *dev)
97{
98 struct device_node *np = dc->dev->of_node;
99 struct of_phandle_iterator it;
100 int err;
101
102 of_for_each_phandle(&it, err, np, "nvidia,outputs", NULL, 0)
103 if (it.node == dev->of_node)
104 return true;
105
106 return false;
107}
108
109/*
110 * Double-buffered registers have two copies: ASSEMBLY and ACTIVE. When the
111 * *_ACT_REQ bits are set the ASSEMBLY copy is latched into the ACTIVE copy.
112 * Latching happens mmediately if the display controller is in STOP mode or
113 * on the next frame boundary otherwise.
114 *
115 * Triple-buffered registers have three copies: ASSEMBLY, ARM and ACTIVE. The
116 * ASSEMBLY copy is latched into the ARM copy immediately after *_UPDATE bits
117 * are written. When the *_ACT_REQ bits are written, the ARM copy is latched
118 * into the ACTIVE copy, either immediately if the display controller is in
119 * STOP mode, or at the next frame boundary otherwise.
120 */
121void tegra_dc_commit(struct tegra_dc *dc)
122{
123 tegra_dc_writel(dc, GENERAL_ACT_REQ << 8, DC_CMD_STATE_CONTROL);
124 tegra_dc_writel(dc, GENERAL_ACT_REQ, DC_CMD_STATE_CONTROL);
125}
126
127static inline u32 compute_dda_inc(unsigned int in, unsigned int out, bool v,
128 unsigned int bpp)
129{
130 fixed20_12 outf = dfixed_init(out);
131 fixed20_12 inf = dfixed_init(in);
132 u32 dda_inc;
133 int max;
134
135 if (v)
136 max = 15;
137 else {
138 switch (bpp) {
139 case 2:
140 max = 8;
141 break;
142
143 default:
144 WARN_ON_ONCE(1);
145 fallthrough;
146 case 4:
147 max = 4;
148 break;
149 }
150 }
151
152 outf.full = max_t(u32, outf.full - dfixed_const(1), dfixed_const(1));
153 inf.full -= dfixed_const(1);
154
155 dda_inc = dfixed_div(inf, outf);
156 dda_inc = min_t(u32, dda_inc, dfixed_const(max));
157
158 return dda_inc;
159}
160
161static inline u32 compute_initial_dda(unsigned int in)
162{
163 fixed20_12 inf = dfixed_init(in);
164 return dfixed_frac(inf);
165}
166
167static void tegra_plane_setup_blending_legacy(struct tegra_plane *plane)
168{
169 u32 background[3] = {
170 BLEND_WEIGHT1(0) | BLEND_WEIGHT0(0) | BLEND_COLOR_KEY_NONE,
171 BLEND_WEIGHT1(0) | BLEND_WEIGHT0(0) | BLEND_COLOR_KEY_NONE,
172 BLEND_WEIGHT1(0) | BLEND_WEIGHT0(0) | BLEND_COLOR_KEY_NONE,
173 };
174 u32 foreground = BLEND_WEIGHT1(255) | BLEND_WEIGHT0(255) |
175 BLEND_COLOR_KEY_NONE;
176 u32 blendnokey = BLEND_WEIGHT1(255) | BLEND_WEIGHT0(255);
177 struct tegra_plane_state *state;
178 u32 blending[2];
179 unsigned int i;
180
181 /* disable blending for non-overlapping case */
182 tegra_plane_writel(plane, blendnokey, DC_WIN_BLEND_NOKEY);
183 tegra_plane_writel(plane, foreground, DC_WIN_BLEND_1WIN);
184
185 state = to_tegra_plane_state(plane->base.state);
186
187 if (state->opaque) {
188 /*
189 * Since custom fix-weight blending isn't utilized and weight
190 * of top window is set to max, we can enforce dependent
191 * blending which in this case results in transparent bottom
192 * window if top window is opaque and if top window enables
193 * alpha blending, then bottom window is getting alpha value
194 * of 1 minus the sum of alpha components of the overlapping
195 * plane.
196 */
197 background[0] |= BLEND_CONTROL_DEPENDENT;
198 background[1] |= BLEND_CONTROL_DEPENDENT;
199
200 /*
201 * The region where three windows overlap is the intersection
202 * of the two regions where two windows overlap. It contributes
203 * to the area if all of the windows on top of it have an alpha
204 * component.
205 */
206 switch (state->base.normalized_zpos) {
207 case 0:
208 if (state->blending[0].alpha &&
209 state->blending[1].alpha)
210 background[2] |= BLEND_CONTROL_DEPENDENT;
211 break;
212
213 case 1:
214 background[2] |= BLEND_CONTROL_DEPENDENT;
215 break;
216 }
217 } else {
218 /*
219 * Enable alpha blending if pixel format has an alpha
220 * component.
221 */
222 foreground |= BLEND_CONTROL_ALPHA;
223
224 /*
225 * If any of the windows on top of this window is opaque, it
226 * will completely conceal this window within that area. If
227 * top window has an alpha component, it is blended over the
228 * bottom window.
229 */
230 for (i = 0; i < 2; i++) {
231 if (state->blending[i].alpha &&
232 state->blending[i].top)
233 background[i] |= BLEND_CONTROL_DEPENDENT;
234 }
235
236 switch (state->base.normalized_zpos) {
237 case 0:
238 if (state->blending[0].alpha &&
239 state->blending[1].alpha)
240 background[2] |= BLEND_CONTROL_DEPENDENT;
241 break;
242
243 case 1:
244 /*
245 * When both middle and topmost windows have an alpha,
246 * these windows a mixed together and then the result
247 * is blended over the bottom window.
248 */
249 if (state->blending[0].alpha &&
250 state->blending[0].top)
251 background[2] |= BLEND_CONTROL_ALPHA;
252
253 if (state->blending[1].alpha &&
254 state->blending[1].top)
255 background[2] |= BLEND_CONTROL_ALPHA;
256 break;
257 }
258 }
259
260 switch (state->base.normalized_zpos) {
261 case 0:
262 tegra_plane_writel(plane, background[0], DC_WIN_BLEND_2WIN_X);
263 tegra_plane_writel(plane, background[1], DC_WIN_BLEND_2WIN_Y);
264 tegra_plane_writel(plane, background[2], DC_WIN_BLEND_3WIN_XY);
265 break;
266
267 case 1:
268 /*
269 * If window B / C is topmost, then X / Y registers are
270 * matching the order of blending[...] state indices,
271 * otherwise a swap is required.
272 */
273 if (!state->blending[0].top && state->blending[1].top) {
274 blending[0] = foreground;
275 blending[1] = background[1];
276 } else {
277 blending[0] = background[0];
278 blending[1] = foreground;
279 }
280
281 tegra_plane_writel(plane, blending[0], DC_WIN_BLEND_2WIN_X);
282 tegra_plane_writel(plane, blending[1], DC_WIN_BLEND_2WIN_Y);
283 tegra_plane_writel(plane, background[2], DC_WIN_BLEND_3WIN_XY);
284 break;
285
286 case 2:
287 tegra_plane_writel(plane, foreground, DC_WIN_BLEND_2WIN_X);
288 tegra_plane_writel(plane, foreground, DC_WIN_BLEND_2WIN_Y);
289 tegra_plane_writel(plane, foreground, DC_WIN_BLEND_3WIN_XY);
290 break;
291 }
292}
293
294static void tegra_plane_setup_blending(struct tegra_plane *plane,
295 const struct tegra_dc_window *window)
296{
297 u32 value;
298
299 value = BLEND_FACTOR_DST_ALPHA_ZERO | BLEND_FACTOR_SRC_ALPHA_K2 |
300 BLEND_FACTOR_DST_COLOR_NEG_K1_TIMES_SRC |
301 BLEND_FACTOR_SRC_COLOR_K1_TIMES_SRC;
302 tegra_plane_writel(plane, value, DC_WIN_BLEND_MATCH_SELECT);
303
304 value = BLEND_FACTOR_DST_ALPHA_ZERO | BLEND_FACTOR_SRC_ALPHA_K2 |
305 BLEND_FACTOR_DST_COLOR_NEG_K1_TIMES_SRC |
306 BLEND_FACTOR_SRC_COLOR_K1_TIMES_SRC;
307 tegra_plane_writel(plane, value, DC_WIN_BLEND_NOMATCH_SELECT);
308
309 value = K2(255) | K1(255) | WINDOW_LAYER_DEPTH(255 - window->zpos);
310 tegra_plane_writel(plane, value, DC_WIN_BLEND_LAYER_CONTROL);
311}
312
313static bool
314tegra_plane_use_horizontal_filtering(struct tegra_plane *plane,
315 const struct tegra_dc_window *window)
316{
317 struct tegra_dc *dc = plane->dc;
318
319 if (window->src.w == window->dst.w)
320 return false;
321
322 if (plane->index == 0 && dc->soc->has_win_a_without_filters)
323 return false;
324
325 return true;
326}
327
328static bool
329tegra_plane_use_vertical_filtering(struct tegra_plane *plane,
330 const struct tegra_dc_window *window)
331{
332 struct tegra_dc *dc = plane->dc;
333
334 if (window->src.h == window->dst.h)
335 return false;
336
337 if (plane->index == 0 && dc->soc->has_win_a_without_filters)
338 return false;
339
340 if (plane->index == 2 && dc->soc->has_win_c_without_vert_filter)
341 return false;
342
343 return true;
344}
345
346static void tegra_dc_setup_window(struct tegra_plane *plane,
347 const struct tegra_dc_window *window)
348{
349 unsigned h_offset, v_offset, h_size, v_size, h_dda, v_dda, bpp;
350 struct tegra_dc *dc = plane->dc;
351 unsigned int planes;
352 u32 value;
353 bool yuv;
354
355 /*
356 * For YUV planar modes, the number of bytes per pixel takes into
357 * account only the luma component and therefore is 1.
358 */
359 yuv = tegra_plane_format_is_yuv(window->format, &planes, NULL);
360 if (!yuv)
361 bpp = window->bits_per_pixel / 8;
362 else
363 bpp = (planes > 1) ? 1 : 2;
364
365 tegra_plane_writel(plane, window->format, DC_WIN_COLOR_DEPTH);
366 tegra_plane_writel(plane, window->swap, DC_WIN_BYTE_SWAP);
367
368 value = V_POSITION(window->dst.y) | H_POSITION(window->dst.x);
369 tegra_plane_writel(plane, value, DC_WIN_POSITION);
370
371 value = V_SIZE(window->dst.h) | H_SIZE(window->dst.w);
372 tegra_plane_writel(plane, value, DC_WIN_SIZE);
373
374 h_offset = window->src.x * bpp;
375 v_offset = window->src.y;
376 h_size = window->src.w * bpp;
377 v_size = window->src.h;
378
379 if (window->reflect_x)
380 h_offset += (window->src.w - 1) * bpp;
381
382 if (window->reflect_y)
383 v_offset += window->src.h - 1;
384
385 value = V_PRESCALED_SIZE(v_size) | H_PRESCALED_SIZE(h_size);
386 tegra_plane_writel(plane, value, DC_WIN_PRESCALED_SIZE);
387
388 /*
389 * For DDA computations the number of bytes per pixel for YUV planar
390 * modes needs to take into account all Y, U and V components.
391 */
392 if (yuv && planes > 1)
393 bpp = 2;
394
395 h_dda = compute_dda_inc(window->src.w, window->dst.w, false, bpp);
396 v_dda = compute_dda_inc(window->src.h, window->dst.h, true, bpp);
397
398 value = V_DDA_INC(v_dda) | H_DDA_INC(h_dda);
399 tegra_plane_writel(plane, value, DC_WIN_DDA_INC);
400
401 h_dda = compute_initial_dda(window->src.x);
402 v_dda = compute_initial_dda(window->src.y);
403
404 tegra_plane_writel(plane, h_dda, DC_WIN_H_INITIAL_DDA);
405 tegra_plane_writel(plane, v_dda, DC_WIN_V_INITIAL_DDA);
406
407 tegra_plane_writel(plane, 0, DC_WIN_UV_BUF_STRIDE);
408 tegra_plane_writel(plane, 0, DC_WIN_BUF_STRIDE);
409
410 tegra_plane_writel(plane, window->base[0], DC_WINBUF_START_ADDR);
411
412 if (yuv && planes > 1) {
413 tegra_plane_writel(plane, window->base[1], DC_WINBUF_START_ADDR_U);
414
415 if (planes > 2)
416 tegra_plane_writel(plane, window->base[2], DC_WINBUF_START_ADDR_V);
417
418 value = window->stride[1] << 16 | window->stride[0];
419 tegra_plane_writel(plane, value, DC_WIN_LINE_STRIDE);
420 } else {
421 tegra_plane_writel(plane, window->stride[0], DC_WIN_LINE_STRIDE);
422 }
423
424 tegra_plane_writel(plane, h_offset, DC_WINBUF_ADDR_H_OFFSET);
425 tegra_plane_writel(plane, v_offset, DC_WINBUF_ADDR_V_OFFSET);
426
427 if (dc->soc->supports_block_linear) {
428 unsigned long height = window->tiling.value;
429
430 switch (window->tiling.mode) {
431 case TEGRA_BO_TILING_MODE_PITCH:
432 value = DC_WINBUF_SURFACE_KIND_PITCH;
433 break;
434
435 case TEGRA_BO_TILING_MODE_TILED:
436 value = DC_WINBUF_SURFACE_KIND_TILED;
437 break;
438
439 case TEGRA_BO_TILING_MODE_BLOCK:
440 value = DC_WINBUF_SURFACE_KIND_BLOCK_HEIGHT(height) |
441 DC_WINBUF_SURFACE_KIND_BLOCK;
442 break;
443 }
444
445 tegra_plane_writel(plane, value, DC_WINBUF_SURFACE_KIND);
446 } else {
447 switch (window->tiling.mode) {
448 case TEGRA_BO_TILING_MODE_PITCH:
449 value = DC_WIN_BUFFER_ADDR_MODE_LINEAR_UV |
450 DC_WIN_BUFFER_ADDR_MODE_LINEAR;
451 break;
452
453 case TEGRA_BO_TILING_MODE_TILED:
454 value = DC_WIN_BUFFER_ADDR_MODE_TILE_UV |
455 DC_WIN_BUFFER_ADDR_MODE_TILE;
456 break;
457
458 case TEGRA_BO_TILING_MODE_BLOCK:
459 /*
460 * No need to handle this here because ->atomic_check
461 * will already have filtered it out.
462 */
463 break;
464 }
465
466 tegra_plane_writel(plane, value, DC_WIN_BUFFER_ADDR_MODE);
467 }
468
469 value = WIN_ENABLE;
470
471 if (yuv) {
472 /* setup default colorspace conversion coefficients */
473 tegra_plane_writel(plane, 0x00f0, DC_WIN_CSC_YOF);
474 tegra_plane_writel(plane, 0x012a, DC_WIN_CSC_KYRGB);
475 tegra_plane_writel(plane, 0x0000, DC_WIN_CSC_KUR);
476 tegra_plane_writel(plane, 0x0198, DC_WIN_CSC_KVR);
477 tegra_plane_writel(plane, 0x039b, DC_WIN_CSC_KUG);
478 tegra_plane_writel(plane, 0x032f, DC_WIN_CSC_KVG);
479 tegra_plane_writel(plane, 0x0204, DC_WIN_CSC_KUB);
480 tegra_plane_writel(plane, 0x0000, DC_WIN_CSC_KVB);
481
482 value |= CSC_ENABLE;
483 } else if (window->bits_per_pixel < 24) {
484 value |= COLOR_EXPAND;
485 }
486
487 if (window->reflect_x)
488 value |= H_DIRECTION;
489
490 if (window->reflect_y)
491 value |= V_DIRECTION;
492
493 if (tegra_plane_use_horizontal_filtering(plane, window)) {
494 /*
495 * Enable horizontal 6-tap filter and set filtering
496 * coefficients to the default values defined in TRM.
497 */
498 tegra_plane_writel(plane, 0x00008000, DC_WIN_H_FILTER_P(0));
499 tegra_plane_writel(plane, 0x3e087ce1, DC_WIN_H_FILTER_P(1));
500 tegra_plane_writel(plane, 0x3b117ac1, DC_WIN_H_FILTER_P(2));
501 tegra_plane_writel(plane, 0x591b73aa, DC_WIN_H_FILTER_P(3));
502 tegra_plane_writel(plane, 0x57256d9a, DC_WIN_H_FILTER_P(4));
503 tegra_plane_writel(plane, 0x552f668b, DC_WIN_H_FILTER_P(5));
504 tegra_plane_writel(plane, 0x73385e8b, DC_WIN_H_FILTER_P(6));
505 tegra_plane_writel(plane, 0x72435583, DC_WIN_H_FILTER_P(7));
506 tegra_plane_writel(plane, 0x714c4c8b, DC_WIN_H_FILTER_P(8));
507 tegra_plane_writel(plane, 0x70554393, DC_WIN_H_FILTER_P(9));
508 tegra_plane_writel(plane, 0x715e389b, DC_WIN_H_FILTER_P(10));
509 tegra_plane_writel(plane, 0x71662faa, DC_WIN_H_FILTER_P(11));
510 tegra_plane_writel(plane, 0x536d25ba, DC_WIN_H_FILTER_P(12));
511 tegra_plane_writel(plane, 0x55731bca, DC_WIN_H_FILTER_P(13));
512 tegra_plane_writel(plane, 0x387a11d9, DC_WIN_H_FILTER_P(14));
513 tegra_plane_writel(plane, 0x3c7c08f1, DC_WIN_H_FILTER_P(15));
514
515 value |= H_FILTER;
516 }
517
518 if (tegra_plane_use_vertical_filtering(plane, window)) {
519 unsigned int i, k;
520
521 /*
522 * Enable vertical 2-tap filter and set filtering
523 * coefficients to the default values defined in TRM.
524 */
525 for (i = 0, k = 128; i < 16; i++, k -= 8)
526 tegra_plane_writel(plane, k, DC_WIN_V_FILTER_P(i));
527
528 value |= V_FILTER;
529 }
530
531 tegra_plane_writel(plane, value, DC_WIN_WIN_OPTIONS);
532
533 if (dc->soc->has_legacy_blending)
534 tegra_plane_setup_blending_legacy(plane);
535 else
536 tegra_plane_setup_blending(plane, window);
537}
538
539static const u32 tegra20_primary_formats[] = {
540 DRM_FORMAT_ARGB4444,
541 DRM_FORMAT_ARGB1555,
542 DRM_FORMAT_RGB565,
543 DRM_FORMAT_RGBA5551,
544 DRM_FORMAT_ABGR8888,
545 DRM_FORMAT_ARGB8888,
546 /* non-native formats */
547 DRM_FORMAT_XRGB1555,
548 DRM_FORMAT_RGBX5551,
549 DRM_FORMAT_XBGR8888,
550 DRM_FORMAT_XRGB8888,
551};
552
553static const u64 tegra20_modifiers[] = {
554 DRM_FORMAT_MOD_LINEAR,
555 DRM_FORMAT_MOD_NVIDIA_TEGRA_TILED,
556 DRM_FORMAT_MOD_INVALID
557};
558
559static const u32 tegra114_primary_formats[] = {
560 DRM_FORMAT_ARGB4444,
561 DRM_FORMAT_ARGB1555,
562 DRM_FORMAT_RGB565,
563 DRM_FORMAT_RGBA5551,
564 DRM_FORMAT_ABGR8888,
565 DRM_FORMAT_ARGB8888,
566 /* new on Tegra114 */
567 DRM_FORMAT_ABGR4444,
568 DRM_FORMAT_ABGR1555,
569 DRM_FORMAT_BGRA5551,
570 DRM_FORMAT_XRGB1555,
571 DRM_FORMAT_RGBX5551,
572 DRM_FORMAT_XBGR1555,
573 DRM_FORMAT_BGRX5551,
574 DRM_FORMAT_BGR565,
575 DRM_FORMAT_BGRA8888,
576 DRM_FORMAT_RGBA8888,
577 DRM_FORMAT_XRGB8888,
578 DRM_FORMAT_XBGR8888,
579};
580
581static const u32 tegra124_primary_formats[] = {
582 DRM_FORMAT_ARGB4444,
583 DRM_FORMAT_ARGB1555,
584 DRM_FORMAT_RGB565,
585 DRM_FORMAT_RGBA5551,
586 DRM_FORMAT_ABGR8888,
587 DRM_FORMAT_ARGB8888,
588 /* new on Tegra114 */
589 DRM_FORMAT_ABGR4444,
590 DRM_FORMAT_ABGR1555,
591 DRM_FORMAT_BGRA5551,
592 DRM_FORMAT_XRGB1555,
593 DRM_FORMAT_RGBX5551,
594 DRM_FORMAT_XBGR1555,
595 DRM_FORMAT_BGRX5551,
596 DRM_FORMAT_BGR565,
597 DRM_FORMAT_BGRA8888,
598 DRM_FORMAT_RGBA8888,
599 DRM_FORMAT_XRGB8888,
600 DRM_FORMAT_XBGR8888,
601 /* new on Tegra124 */
602 DRM_FORMAT_RGBX8888,
603 DRM_FORMAT_BGRX8888,
604};
605
606static const u64 tegra124_modifiers[] = {
607 DRM_FORMAT_MOD_LINEAR,
608 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0),
609 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1),
610 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2),
611 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(3),
612 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(4),
613 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(5),
614 DRM_FORMAT_MOD_INVALID
615};
616
617static int tegra_plane_atomic_check(struct drm_plane *plane,
618 struct drm_atomic_state *state)
619{
620 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
621 plane);
622 struct tegra_plane_state *plane_state = to_tegra_plane_state(new_plane_state);
623 unsigned int supported_rotation = DRM_MODE_ROTATE_0 |
624 DRM_MODE_REFLECT_X |
625 DRM_MODE_REFLECT_Y;
626 unsigned int rotation = new_plane_state->rotation;
627 struct tegra_bo_tiling *tiling = &plane_state->tiling;
628 struct tegra_plane *tegra = to_tegra_plane(plane);
629 struct tegra_dc *dc = to_tegra_dc(new_plane_state->crtc);
630 int err;
631
632 plane_state->peak_memory_bandwidth = 0;
633 plane_state->avg_memory_bandwidth = 0;
634
635 /* no need for further checks if the plane is being disabled */
636 if (!new_plane_state->crtc) {
637 plane_state->total_peak_memory_bandwidth = 0;
638 return 0;
639 }
640
641 err = tegra_plane_format(new_plane_state->fb->format->format,
642 &plane_state->format,
643 &plane_state->swap);
644 if (err < 0)
645 return err;
646
647 /*
648 * Tegra20 and Tegra30 are special cases here because they support
649 * only variants of specific formats with an alpha component, but not
650 * the corresponding opaque formats. However, the opaque formats can
651 * be emulated by disabling alpha blending for the plane.
652 */
653 if (dc->soc->has_legacy_blending) {
654 err = tegra_plane_setup_legacy_state(tegra, plane_state);
655 if (err < 0)
656 return err;
657 }
658
659 err = tegra_fb_get_tiling(new_plane_state->fb, tiling);
660 if (err < 0)
661 return err;
662
663 if (tiling->mode == TEGRA_BO_TILING_MODE_BLOCK &&
664 !dc->soc->supports_block_linear) {
665 DRM_ERROR("hardware doesn't support block linear mode\n");
666 return -EINVAL;
667 }
668
669 /*
670 * Older userspace used custom BO flag in order to specify the Y
671 * reflection, while modern userspace uses the generic DRM rotation
672 * property in order to achieve the same result. The legacy BO flag
673 * duplicates the DRM rotation property when both are set.
674 */
675 if (tegra_fb_is_bottom_up(new_plane_state->fb))
676 rotation |= DRM_MODE_REFLECT_Y;
677
678 rotation = drm_rotation_simplify(rotation, supported_rotation);
679
680 if (rotation & DRM_MODE_REFLECT_X)
681 plane_state->reflect_x = true;
682 else
683 plane_state->reflect_x = false;
684
685 if (rotation & DRM_MODE_REFLECT_Y)
686 plane_state->reflect_y = true;
687 else
688 plane_state->reflect_y = false;
689
690 /*
691 * Tegra doesn't support different strides for U and V planes so we
692 * error out if the user tries to display a framebuffer with such a
693 * configuration.
694 */
695 if (new_plane_state->fb->format->num_planes > 2) {
696 if (new_plane_state->fb->pitches[2] != new_plane_state->fb->pitches[1]) {
697 DRM_ERROR("unsupported UV-plane configuration\n");
698 return -EINVAL;
699 }
700 }
701
702 err = tegra_plane_state_add(tegra, new_plane_state);
703 if (err < 0)
704 return err;
705
706 return 0;
707}
708
709static void tegra_plane_atomic_disable(struct drm_plane *plane,
710 struct drm_atomic_state *state)
711{
712 struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
713 plane);
714 struct tegra_plane *p = to_tegra_plane(plane);
715 u32 value;
716
717 /* rien ne va plus */
718 if (!old_state || !old_state->crtc)
719 return;
720
721 value = tegra_plane_readl(p, DC_WIN_WIN_OPTIONS);
722 value &= ~WIN_ENABLE;
723 tegra_plane_writel(p, value, DC_WIN_WIN_OPTIONS);
724}
725
726static void tegra_plane_atomic_update(struct drm_plane *plane,
727 struct drm_atomic_state *state)
728{
729 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
730 plane);
731 struct tegra_plane_state *tegra_plane_state = to_tegra_plane_state(new_state);
732 struct drm_framebuffer *fb = new_state->fb;
733 struct tegra_plane *p = to_tegra_plane(plane);
734 struct tegra_dc_window window;
735 unsigned int i;
736
737 /* rien ne va plus */
738 if (!new_state->crtc || !new_state->fb)
739 return;
740
741 if (!new_state->visible)
742 return tegra_plane_atomic_disable(plane, state);
743
744 memset(&window, 0, sizeof(window));
745 window.src.x = new_state->src.x1 >> 16;
746 window.src.y = new_state->src.y1 >> 16;
747 window.src.w = drm_rect_width(&new_state->src) >> 16;
748 window.src.h = drm_rect_height(&new_state->src) >> 16;
749 window.dst.x = new_state->dst.x1;
750 window.dst.y = new_state->dst.y1;
751 window.dst.w = drm_rect_width(&new_state->dst);
752 window.dst.h = drm_rect_height(&new_state->dst);
753 window.bits_per_pixel = fb->format->cpp[0] * 8;
754 window.reflect_x = tegra_plane_state->reflect_x;
755 window.reflect_y = tegra_plane_state->reflect_y;
756
757 /* copy from state */
758 window.zpos = new_state->normalized_zpos;
759 window.tiling = tegra_plane_state->tiling;
760 window.format = tegra_plane_state->format;
761 window.swap = tegra_plane_state->swap;
762
763 for (i = 0; i < fb->format->num_planes; i++) {
764 window.base[i] = tegra_plane_state->iova[i] + fb->offsets[i];
765
766 /*
767 * Tegra uses a shared stride for UV planes. Framebuffers are
768 * already checked for this in the tegra_plane_atomic_check()
769 * function, so it's safe to ignore the V-plane pitch here.
770 */
771 if (i < 2)
772 window.stride[i] = fb->pitches[i];
773 }
774
775 tegra_dc_setup_window(p, &window);
776}
777
778static const struct drm_plane_helper_funcs tegra_plane_helper_funcs = {
779 .prepare_fb = tegra_plane_prepare_fb,
780 .cleanup_fb = tegra_plane_cleanup_fb,
781 .atomic_check = tegra_plane_atomic_check,
782 .atomic_disable = tegra_plane_atomic_disable,
783 .atomic_update = tegra_plane_atomic_update,
784};
785
786static unsigned long tegra_plane_get_possible_crtcs(struct drm_device *drm)
787{
788 /*
789 * Ideally this would use drm_crtc_mask(), but that would require the
790 * CRTC to already be in the mode_config's list of CRTCs. However, it
791 * will only be added to that list in the drm_crtc_init_with_planes()
792 * (in tegra_dc_init()), which in turn requires registration of these
793 * planes. So we have ourselves a nice little chicken and egg problem
794 * here.
795 *
796 * We work around this by manually creating the mask from the number
797 * of CRTCs that have been registered, and should therefore always be
798 * the same as drm_crtc_index() after registration.
799 */
800 return 1 << drm->mode_config.num_crtc;
801}
802
803static struct drm_plane *tegra_primary_plane_create(struct drm_device *drm,
804 struct tegra_dc *dc)
805{
806 unsigned long possible_crtcs = tegra_plane_get_possible_crtcs(drm);
807 enum drm_plane_type type = DRM_PLANE_TYPE_PRIMARY;
808 struct tegra_plane *plane;
809 unsigned int num_formats;
810 const u64 *modifiers;
811 const u32 *formats;
812 int err;
813
814 plane = kzalloc(sizeof(*plane), GFP_KERNEL);
815 if (!plane)
816 return ERR_PTR(-ENOMEM);
817
818 /* Always use window A as primary window */
819 plane->offset = 0xa00;
820 plane->index = 0;
821 plane->dc = dc;
822
823 num_formats = dc->soc->num_primary_formats;
824 formats = dc->soc->primary_formats;
825 modifiers = dc->soc->modifiers;
826
827 err = tegra_plane_interconnect_init(plane);
828 if (err) {
829 kfree(plane);
830 return ERR_PTR(err);
831 }
832
833 err = drm_universal_plane_init(drm, &plane->base, possible_crtcs,
834 &tegra_plane_funcs, formats,
835 num_formats, modifiers, type, NULL);
836 if (err < 0) {
837 kfree(plane);
838 return ERR_PTR(err);
839 }
840
841 drm_plane_helper_add(&plane->base, &tegra_plane_helper_funcs);
842 drm_plane_create_zpos_property(&plane->base, plane->index, 0, 255);
843
844 err = drm_plane_create_rotation_property(&plane->base,
845 DRM_MODE_ROTATE_0,
846 DRM_MODE_ROTATE_0 |
847 DRM_MODE_ROTATE_180 |
848 DRM_MODE_REFLECT_X |
849 DRM_MODE_REFLECT_Y);
850 if (err < 0)
851 dev_err(dc->dev, "failed to create rotation property: %d\n",
852 err);
853
854 return &plane->base;
855}
856
857static const u32 tegra_legacy_cursor_plane_formats[] = {
858 DRM_FORMAT_RGBA8888,
859};
860
861static const u32 tegra_cursor_plane_formats[] = {
862 DRM_FORMAT_ARGB8888,
863};
864
865static int tegra_cursor_atomic_check(struct drm_plane *plane,
866 struct drm_atomic_state *state)
867{
868 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
869 plane);
870 struct tegra_plane_state *plane_state = to_tegra_plane_state(new_plane_state);
871 struct tegra_plane *tegra = to_tegra_plane(plane);
872 int err;
873
874 plane_state->peak_memory_bandwidth = 0;
875 plane_state->avg_memory_bandwidth = 0;
876
877 /* no need for further checks if the plane is being disabled */
878 if (!new_plane_state->crtc) {
879 plane_state->total_peak_memory_bandwidth = 0;
880 return 0;
881 }
882
883 /* scaling not supported for cursor */
884 if ((new_plane_state->src_w >> 16 != new_plane_state->crtc_w) ||
885 (new_plane_state->src_h >> 16 != new_plane_state->crtc_h))
886 return -EINVAL;
887
888 /* only square cursors supported */
889 if (new_plane_state->src_w != new_plane_state->src_h)
890 return -EINVAL;
891
892 if (new_plane_state->crtc_w != 32 && new_plane_state->crtc_w != 64 &&
893 new_plane_state->crtc_w != 128 && new_plane_state->crtc_w != 256)
894 return -EINVAL;
895
896 err = tegra_plane_state_add(tegra, new_plane_state);
897 if (err < 0)
898 return err;
899
900 return 0;
901}
902
903static void __tegra_cursor_atomic_update(struct drm_plane *plane,
904 struct drm_plane_state *new_state)
905{
906 struct tegra_plane_state *tegra_plane_state = to_tegra_plane_state(new_state);
907 struct tegra_dc *dc = to_tegra_dc(new_state->crtc);
908 struct tegra_drm *tegra = plane->dev->dev_private;
909#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
910 u64 dma_mask = *dc->dev->dma_mask;
911#endif
912 unsigned int x, y;
913 u32 value = 0;
914
915 /* rien ne va plus */
916 if (!new_state->crtc || !new_state->fb)
917 return;
918
919 /*
920 * Legacy display supports hardware clipping of the cursor, but
921 * nvdisplay relies on software to clip the cursor to the screen.
922 */
923 if (!dc->soc->has_nvdisplay)
924 value |= CURSOR_CLIP_DISPLAY;
925
926 switch (new_state->crtc_w) {
927 case 32:
928 value |= CURSOR_SIZE_32x32;
929 break;
930
931 case 64:
932 value |= CURSOR_SIZE_64x64;
933 break;
934
935 case 128:
936 value |= CURSOR_SIZE_128x128;
937 break;
938
939 case 256:
940 value |= CURSOR_SIZE_256x256;
941 break;
942
943 default:
944 WARN(1, "cursor size %ux%u not supported\n",
945 new_state->crtc_w, new_state->crtc_h);
946 return;
947 }
948
949 value |= (tegra_plane_state->iova[0] >> 10) & 0x3fffff;
950 tegra_dc_writel(dc, value, DC_DISP_CURSOR_START_ADDR);
951
952#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
953 value = (tegra_plane_state->iova[0] >> 32) & (dma_mask >> 32);
954 tegra_dc_writel(dc, value, DC_DISP_CURSOR_START_ADDR_HI);
955#endif
956
957 /* enable cursor and set blend mode */
958 value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
959 value |= CURSOR_ENABLE;
960 tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
961
962 value = tegra_dc_readl(dc, DC_DISP_BLEND_CURSOR_CONTROL);
963 value &= ~CURSOR_DST_BLEND_MASK;
964 value &= ~CURSOR_SRC_BLEND_MASK;
965
966 if (dc->soc->has_nvdisplay)
967 value &= ~CURSOR_COMPOSITION_MODE_XOR;
968 else
969 value |= CURSOR_MODE_NORMAL;
970
971 value |= CURSOR_DST_BLEND_NEG_K1_TIMES_SRC;
972 value |= CURSOR_SRC_BLEND_K1_TIMES_SRC;
973 value |= CURSOR_ALPHA;
974 tegra_dc_writel(dc, value, DC_DISP_BLEND_CURSOR_CONTROL);
975
976 /* nvdisplay relies on software for clipping */
977 if (dc->soc->has_nvdisplay) {
978 struct drm_rect src;
979
980 x = new_state->dst.x1;
981 y = new_state->dst.y1;
982
983 drm_rect_fp_to_int(&src, &new_state->src);
984
985 value = (src.y1 & tegra->vmask) << 16 | (src.x1 & tegra->hmask);
986 tegra_dc_writel(dc, value, DC_DISP_PCALC_HEAD_SET_CROPPED_POINT_IN_CURSOR);
987
988 value = (drm_rect_height(&src) & tegra->vmask) << 16 |
989 (drm_rect_width(&src) & tegra->hmask);
990 tegra_dc_writel(dc, value, DC_DISP_PCALC_HEAD_SET_CROPPED_SIZE_IN_CURSOR);
991 } else {
992 x = new_state->crtc_x;
993 y = new_state->crtc_y;
994 }
995
996 /* position the cursor */
997 value = ((y & tegra->vmask) << 16) | (x & tegra->hmask);
998 tegra_dc_writel(dc, value, DC_DISP_CURSOR_POSITION);
999}
1000
1001static void tegra_cursor_atomic_update(struct drm_plane *plane,
1002 struct drm_atomic_state *state)
1003{
1004 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, plane);
1005
1006 __tegra_cursor_atomic_update(plane, new_state);
1007}
1008
1009static void tegra_cursor_atomic_disable(struct drm_plane *plane,
1010 struct drm_atomic_state *state)
1011{
1012 struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
1013 plane);
1014 struct tegra_dc *dc;
1015 u32 value;
1016
1017 /* rien ne va plus */
1018 if (!old_state || !old_state->crtc)
1019 return;
1020
1021 dc = to_tegra_dc(old_state->crtc);
1022
1023 value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
1024 value &= ~CURSOR_ENABLE;
1025 tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
1026}
1027
1028static int tegra_cursor_atomic_async_check(struct drm_plane *plane, struct drm_atomic_state *state)
1029{
1030 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, plane);
1031 struct drm_crtc_state *crtc_state;
1032 int min_scale, max_scale;
1033 int err;
1034
1035 crtc_state = drm_atomic_get_existing_crtc_state(state, new_state->crtc);
1036 if (WARN_ON(!crtc_state))
1037 return -EINVAL;
1038
1039 if (!crtc_state->active)
1040 return -EINVAL;
1041
1042 if (plane->state->crtc != new_state->crtc ||
1043 plane->state->src_w != new_state->src_w ||
1044 plane->state->src_h != new_state->src_h ||
1045 plane->state->crtc_w != new_state->crtc_w ||
1046 plane->state->crtc_h != new_state->crtc_h ||
1047 plane->state->fb != new_state->fb ||
1048 plane->state->fb == NULL)
1049 return -EINVAL;
1050
1051 min_scale = (1 << 16) / 8;
1052 max_scale = (8 << 16) / 1;
1053
1054 err = drm_atomic_helper_check_plane_state(new_state, crtc_state, min_scale, max_scale,
1055 true, true);
1056 if (err < 0)
1057 return err;
1058
1059 if (new_state->visible != plane->state->visible)
1060 return -EINVAL;
1061
1062 return 0;
1063}
1064
1065static void tegra_cursor_atomic_async_update(struct drm_plane *plane,
1066 struct drm_atomic_state *state)
1067{
1068 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, plane);
1069 struct tegra_dc *dc = to_tegra_dc(new_state->crtc);
1070
1071 plane->state->src_x = new_state->src_x;
1072 plane->state->src_y = new_state->src_y;
1073 plane->state->crtc_x = new_state->crtc_x;
1074 plane->state->crtc_y = new_state->crtc_y;
1075
1076 if (new_state->visible) {
1077 struct tegra_plane *p = to_tegra_plane(plane);
1078 u32 value;
1079
1080 __tegra_cursor_atomic_update(plane, new_state);
1081
1082 value = (WIN_A_ACT_REQ << p->index) << 8 | GENERAL_UPDATE;
1083 tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL);
1084 (void)tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
1085
1086 value = (WIN_A_ACT_REQ << p->index) | GENERAL_ACT_REQ;
1087 tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL);
1088 (void)tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
1089 }
1090}
1091
1092static const struct drm_plane_helper_funcs tegra_cursor_plane_helper_funcs = {
1093 .prepare_fb = tegra_plane_prepare_fb,
1094 .cleanup_fb = tegra_plane_cleanup_fb,
1095 .atomic_check = tegra_cursor_atomic_check,
1096 .atomic_update = tegra_cursor_atomic_update,
1097 .atomic_disable = tegra_cursor_atomic_disable,
1098 .atomic_async_check = tegra_cursor_atomic_async_check,
1099 .atomic_async_update = tegra_cursor_atomic_async_update,
1100};
1101
1102static const uint64_t linear_modifiers[] = {
1103 DRM_FORMAT_MOD_LINEAR,
1104 DRM_FORMAT_MOD_INVALID
1105};
1106
1107static struct drm_plane *tegra_dc_cursor_plane_create(struct drm_device *drm,
1108 struct tegra_dc *dc)
1109{
1110 unsigned long possible_crtcs = tegra_plane_get_possible_crtcs(drm);
1111 struct tegra_plane *plane;
1112 unsigned int num_formats;
1113 const u32 *formats;
1114 int err;
1115
1116 plane = kzalloc(sizeof(*plane), GFP_KERNEL);
1117 if (!plane)
1118 return ERR_PTR(-ENOMEM);
1119
1120 /*
1121 * This index is kind of fake. The cursor isn't a regular plane, but
1122 * its update and activation request bits in DC_CMD_STATE_CONTROL do
1123 * use the same programming. Setting this fake index here allows the
1124 * code in tegra_add_plane_state() to do the right thing without the
1125 * need to special-casing the cursor plane.
1126 */
1127 plane->index = 6;
1128 plane->dc = dc;
1129
1130 if (!dc->soc->has_nvdisplay) {
1131 num_formats = ARRAY_SIZE(tegra_legacy_cursor_plane_formats);
1132 formats = tegra_legacy_cursor_plane_formats;
1133
1134 err = tegra_plane_interconnect_init(plane);
1135 if (err) {
1136 kfree(plane);
1137 return ERR_PTR(err);
1138 }
1139 } else {
1140 num_formats = ARRAY_SIZE(tegra_cursor_plane_formats);
1141 formats = tegra_cursor_plane_formats;
1142 }
1143
1144 err = drm_universal_plane_init(drm, &plane->base, possible_crtcs,
1145 &tegra_plane_funcs, formats,
1146 num_formats, linear_modifiers,
1147 DRM_PLANE_TYPE_CURSOR, NULL);
1148 if (err < 0) {
1149 kfree(plane);
1150 return ERR_PTR(err);
1151 }
1152
1153 drm_plane_helper_add(&plane->base, &tegra_cursor_plane_helper_funcs);
1154 drm_plane_create_zpos_immutable_property(&plane->base, 255);
1155
1156 return &plane->base;
1157}
1158
1159static const u32 tegra20_overlay_formats[] = {
1160 DRM_FORMAT_ARGB4444,
1161 DRM_FORMAT_ARGB1555,
1162 DRM_FORMAT_RGB565,
1163 DRM_FORMAT_RGBA5551,
1164 DRM_FORMAT_ABGR8888,
1165 DRM_FORMAT_ARGB8888,
1166 /* non-native formats */
1167 DRM_FORMAT_XRGB1555,
1168 DRM_FORMAT_RGBX5551,
1169 DRM_FORMAT_XBGR8888,
1170 DRM_FORMAT_XRGB8888,
1171 /* planar formats */
1172 DRM_FORMAT_UYVY,
1173 DRM_FORMAT_YUYV,
1174 DRM_FORMAT_YUV420,
1175 DRM_FORMAT_YUV422,
1176};
1177
1178static const u32 tegra114_overlay_formats[] = {
1179 DRM_FORMAT_ARGB4444,
1180 DRM_FORMAT_ARGB1555,
1181 DRM_FORMAT_RGB565,
1182 DRM_FORMAT_RGBA5551,
1183 DRM_FORMAT_ABGR8888,
1184 DRM_FORMAT_ARGB8888,
1185 /* new on Tegra114 */
1186 DRM_FORMAT_ABGR4444,
1187 DRM_FORMAT_ABGR1555,
1188 DRM_FORMAT_BGRA5551,
1189 DRM_FORMAT_XRGB1555,
1190 DRM_FORMAT_RGBX5551,
1191 DRM_FORMAT_XBGR1555,
1192 DRM_FORMAT_BGRX5551,
1193 DRM_FORMAT_BGR565,
1194 DRM_FORMAT_BGRA8888,
1195 DRM_FORMAT_RGBA8888,
1196 DRM_FORMAT_XRGB8888,
1197 DRM_FORMAT_XBGR8888,
1198 /* planar formats */
1199 DRM_FORMAT_UYVY,
1200 DRM_FORMAT_YUYV,
1201 DRM_FORMAT_YUV420,
1202 DRM_FORMAT_YUV422,
1203 /* semi-planar formats */
1204 DRM_FORMAT_NV12,
1205 DRM_FORMAT_NV21,
1206 DRM_FORMAT_NV16,
1207 DRM_FORMAT_NV61,
1208 DRM_FORMAT_NV24,
1209 DRM_FORMAT_NV42,
1210};
1211
1212static const u32 tegra124_overlay_formats[] = {
1213 DRM_FORMAT_ARGB4444,
1214 DRM_FORMAT_ARGB1555,
1215 DRM_FORMAT_RGB565,
1216 DRM_FORMAT_RGBA5551,
1217 DRM_FORMAT_ABGR8888,
1218 DRM_FORMAT_ARGB8888,
1219 /* new on Tegra114 */
1220 DRM_FORMAT_ABGR4444,
1221 DRM_FORMAT_ABGR1555,
1222 DRM_FORMAT_BGRA5551,
1223 DRM_FORMAT_XRGB1555,
1224 DRM_FORMAT_RGBX5551,
1225 DRM_FORMAT_XBGR1555,
1226 DRM_FORMAT_BGRX5551,
1227 DRM_FORMAT_BGR565,
1228 DRM_FORMAT_BGRA8888,
1229 DRM_FORMAT_RGBA8888,
1230 DRM_FORMAT_XRGB8888,
1231 DRM_FORMAT_XBGR8888,
1232 /* new on Tegra124 */
1233 DRM_FORMAT_RGBX8888,
1234 DRM_FORMAT_BGRX8888,
1235 /* planar formats */
1236 DRM_FORMAT_UYVY,
1237 DRM_FORMAT_YUYV,
1238 DRM_FORMAT_YVYU,
1239 DRM_FORMAT_VYUY,
1240 DRM_FORMAT_YUV420, /* YU12 */
1241 DRM_FORMAT_YUV422, /* YU16 */
1242 DRM_FORMAT_YUV444, /* YU24 */
1243 /* semi-planar formats */
1244 DRM_FORMAT_NV12,
1245 DRM_FORMAT_NV21,
1246 DRM_FORMAT_NV16,
1247 DRM_FORMAT_NV61,
1248 DRM_FORMAT_NV24,
1249 DRM_FORMAT_NV42,
1250};
1251
1252static struct drm_plane *tegra_dc_overlay_plane_create(struct drm_device *drm,
1253 struct tegra_dc *dc,
1254 unsigned int index,
1255 bool cursor)
1256{
1257 unsigned long possible_crtcs = tegra_plane_get_possible_crtcs(drm);
1258 struct tegra_plane *plane;
1259 unsigned int num_formats;
1260 enum drm_plane_type type;
1261 const u32 *formats;
1262 int err;
1263
1264 plane = kzalloc(sizeof(*plane), GFP_KERNEL);
1265 if (!plane)
1266 return ERR_PTR(-ENOMEM);
1267
1268 plane->offset = 0xa00 + 0x200 * index;
1269 plane->index = index;
1270 plane->dc = dc;
1271
1272 num_formats = dc->soc->num_overlay_formats;
1273 formats = dc->soc->overlay_formats;
1274
1275 err = tegra_plane_interconnect_init(plane);
1276 if (err) {
1277 kfree(plane);
1278 return ERR_PTR(err);
1279 }
1280
1281 if (!cursor)
1282 type = DRM_PLANE_TYPE_OVERLAY;
1283 else
1284 type = DRM_PLANE_TYPE_CURSOR;
1285
1286 err = drm_universal_plane_init(drm, &plane->base, possible_crtcs,
1287 &tegra_plane_funcs, formats,
1288 num_formats, linear_modifiers,
1289 type, NULL);
1290 if (err < 0) {
1291 kfree(plane);
1292 return ERR_PTR(err);
1293 }
1294
1295 drm_plane_helper_add(&plane->base, &tegra_plane_helper_funcs);
1296 drm_plane_create_zpos_property(&plane->base, plane->index, 0, 255);
1297
1298 err = drm_plane_create_rotation_property(&plane->base,
1299 DRM_MODE_ROTATE_0,
1300 DRM_MODE_ROTATE_0 |
1301 DRM_MODE_ROTATE_180 |
1302 DRM_MODE_REFLECT_X |
1303 DRM_MODE_REFLECT_Y);
1304 if (err < 0)
1305 dev_err(dc->dev, "failed to create rotation property: %d\n",
1306 err);
1307
1308 return &plane->base;
1309}
1310
1311static struct drm_plane *tegra_dc_add_shared_planes(struct drm_device *drm,
1312 struct tegra_dc *dc)
1313{
1314 struct drm_plane *plane, *primary = NULL;
1315 unsigned int i, j;
1316
1317 for (i = 0; i < dc->soc->num_wgrps; i++) {
1318 const struct tegra_windowgroup_soc *wgrp = &dc->soc->wgrps[i];
1319
1320 if (wgrp->dc == dc->pipe) {
1321 for (j = 0; j < wgrp->num_windows; j++) {
1322 unsigned int index = wgrp->windows[j];
1323
1324 plane = tegra_shared_plane_create(drm, dc,
1325 wgrp->index,
1326 index);
1327 if (IS_ERR(plane))
1328 return plane;
1329
1330 /*
1331 * Choose the first shared plane owned by this
1332 * head as the primary plane.
1333 */
1334 if (!primary) {
1335 plane->type = DRM_PLANE_TYPE_PRIMARY;
1336 primary = plane;
1337 }
1338 }
1339 }
1340 }
1341
1342 return primary;
1343}
1344
1345static struct drm_plane *tegra_dc_add_planes(struct drm_device *drm,
1346 struct tegra_dc *dc)
1347{
1348 struct drm_plane *planes[2], *primary;
1349 unsigned int planes_num;
1350 unsigned int i;
1351 int err;
1352
1353 primary = tegra_primary_plane_create(drm, dc);
1354 if (IS_ERR(primary))
1355 return primary;
1356
1357 if (dc->soc->supports_cursor)
1358 planes_num = 2;
1359 else
1360 planes_num = 1;
1361
1362 for (i = 0; i < planes_num; i++) {
1363 planes[i] = tegra_dc_overlay_plane_create(drm, dc, 1 + i,
1364 false);
1365 if (IS_ERR(planes[i])) {
1366 err = PTR_ERR(planes[i]);
1367
1368 while (i--)
1369 planes[i]->funcs->destroy(planes[i]);
1370
1371 primary->funcs->destroy(primary);
1372 return ERR_PTR(err);
1373 }
1374 }
1375
1376 return primary;
1377}
1378
1379static void tegra_dc_destroy(struct drm_crtc *crtc)
1380{
1381 drm_crtc_cleanup(crtc);
1382}
1383
1384static void tegra_crtc_reset(struct drm_crtc *crtc)
1385{
1386 struct tegra_dc_state *state = kzalloc(sizeof(*state), GFP_KERNEL);
1387
1388 if (crtc->state)
1389 tegra_crtc_atomic_destroy_state(crtc, crtc->state);
1390
1391 __drm_atomic_helper_crtc_reset(crtc, &state->base);
1392}
1393
1394static struct drm_crtc_state *
1395tegra_crtc_atomic_duplicate_state(struct drm_crtc *crtc)
1396{
1397 struct tegra_dc_state *state = to_dc_state(crtc->state);
1398 struct tegra_dc_state *copy;
1399
1400 copy = kmalloc(sizeof(*copy), GFP_KERNEL);
1401 if (!copy)
1402 return NULL;
1403
1404 __drm_atomic_helper_crtc_duplicate_state(crtc, ©->base);
1405 copy->clk = state->clk;
1406 copy->pclk = state->pclk;
1407 copy->div = state->div;
1408 copy->planes = state->planes;
1409
1410 return ©->base;
1411}
1412
1413static void tegra_crtc_atomic_destroy_state(struct drm_crtc *crtc,
1414 struct drm_crtc_state *state)
1415{
1416 __drm_atomic_helper_crtc_destroy_state(state);
1417 kfree(state);
1418}
1419
1420#define DEBUGFS_REG32(_name) { .name = #_name, .offset = _name }
1421
1422static const struct debugfs_reg32 tegra_dc_regs[] = {
1423 DEBUGFS_REG32(DC_CMD_GENERAL_INCR_SYNCPT),
1424 DEBUGFS_REG32(DC_CMD_GENERAL_INCR_SYNCPT_CNTRL),
1425 DEBUGFS_REG32(DC_CMD_GENERAL_INCR_SYNCPT_ERROR),
1426 DEBUGFS_REG32(DC_CMD_WIN_A_INCR_SYNCPT),
1427 DEBUGFS_REG32(DC_CMD_WIN_A_INCR_SYNCPT_CNTRL),
1428 DEBUGFS_REG32(DC_CMD_WIN_A_INCR_SYNCPT_ERROR),
1429 DEBUGFS_REG32(DC_CMD_WIN_B_INCR_SYNCPT),
1430 DEBUGFS_REG32(DC_CMD_WIN_B_INCR_SYNCPT_CNTRL),
1431 DEBUGFS_REG32(DC_CMD_WIN_B_INCR_SYNCPT_ERROR),
1432 DEBUGFS_REG32(DC_CMD_WIN_C_INCR_SYNCPT),
1433 DEBUGFS_REG32(DC_CMD_WIN_C_INCR_SYNCPT_CNTRL),
1434 DEBUGFS_REG32(DC_CMD_WIN_C_INCR_SYNCPT_ERROR),
1435 DEBUGFS_REG32(DC_CMD_CONT_SYNCPT_VSYNC),
1436 DEBUGFS_REG32(DC_CMD_DISPLAY_COMMAND_OPTION0),
1437 DEBUGFS_REG32(DC_CMD_DISPLAY_COMMAND),
1438 DEBUGFS_REG32(DC_CMD_SIGNAL_RAISE),
1439 DEBUGFS_REG32(DC_CMD_DISPLAY_POWER_CONTROL),
1440 DEBUGFS_REG32(DC_CMD_INT_STATUS),
1441 DEBUGFS_REG32(DC_CMD_INT_MASK),
1442 DEBUGFS_REG32(DC_CMD_INT_ENABLE),
1443 DEBUGFS_REG32(DC_CMD_INT_TYPE),
1444 DEBUGFS_REG32(DC_CMD_INT_POLARITY),
1445 DEBUGFS_REG32(DC_CMD_SIGNAL_RAISE1),
1446 DEBUGFS_REG32(DC_CMD_SIGNAL_RAISE2),
1447 DEBUGFS_REG32(DC_CMD_SIGNAL_RAISE3),
1448 DEBUGFS_REG32(DC_CMD_STATE_ACCESS),
1449 DEBUGFS_REG32(DC_CMD_STATE_CONTROL),
1450 DEBUGFS_REG32(DC_CMD_DISPLAY_WINDOW_HEADER),
1451 DEBUGFS_REG32(DC_CMD_REG_ACT_CONTROL),
1452 DEBUGFS_REG32(DC_COM_CRC_CONTROL),
1453 DEBUGFS_REG32(DC_COM_CRC_CHECKSUM),
1454 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_ENABLE(0)),
1455 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_ENABLE(1)),
1456 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_ENABLE(2)),
1457 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_ENABLE(3)),
1458 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_POLARITY(0)),
1459 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_POLARITY(1)),
1460 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_POLARITY(2)),
1461 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_POLARITY(3)),
1462 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_DATA(0)),
1463 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_DATA(1)),
1464 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_DATA(2)),
1465 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_DATA(3)),
1466 DEBUGFS_REG32(DC_COM_PIN_INPUT_ENABLE(0)),
1467 DEBUGFS_REG32(DC_COM_PIN_INPUT_ENABLE(1)),
1468 DEBUGFS_REG32(DC_COM_PIN_INPUT_ENABLE(2)),
1469 DEBUGFS_REG32(DC_COM_PIN_INPUT_ENABLE(3)),
1470 DEBUGFS_REG32(DC_COM_PIN_INPUT_DATA(0)),
1471 DEBUGFS_REG32(DC_COM_PIN_INPUT_DATA(1)),
1472 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(0)),
1473 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(1)),
1474 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(2)),
1475 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(3)),
1476 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(4)),
1477 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(5)),
1478 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(6)),
1479 DEBUGFS_REG32(DC_COM_PIN_MISC_CONTROL),
1480 DEBUGFS_REG32(DC_COM_PIN_PM0_CONTROL),
1481 DEBUGFS_REG32(DC_COM_PIN_PM0_DUTY_CYCLE),
1482 DEBUGFS_REG32(DC_COM_PIN_PM1_CONTROL),
1483 DEBUGFS_REG32(DC_COM_PIN_PM1_DUTY_CYCLE),
1484 DEBUGFS_REG32(DC_COM_SPI_CONTROL),
1485 DEBUGFS_REG32(DC_COM_SPI_START_BYTE),
1486 DEBUGFS_REG32(DC_COM_HSPI_WRITE_DATA_AB),
1487 DEBUGFS_REG32(DC_COM_HSPI_WRITE_DATA_CD),
1488 DEBUGFS_REG32(DC_COM_HSPI_CS_DC),
1489 DEBUGFS_REG32(DC_COM_SCRATCH_REGISTER_A),
1490 DEBUGFS_REG32(DC_COM_SCRATCH_REGISTER_B),
1491 DEBUGFS_REG32(DC_COM_GPIO_CTRL),
1492 DEBUGFS_REG32(DC_COM_GPIO_DEBOUNCE_COUNTER),
1493 DEBUGFS_REG32(DC_COM_CRC_CHECKSUM_LATCHED),
1494 DEBUGFS_REG32(DC_DISP_DISP_SIGNAL_OPTIONS0),
1495 DEBUGFS_REG32(DC_DISP_DISP_SIGNAL_OPTIONS1),
1496 DEBUGFS_REG32(DC_DISP_DISP_WIN_OPTIONS),
1497 DEBUGFS_REG32(DC_DISP_DISP_MEM_HIGH_PRIORITY),
1498 DEBUGFS_REG32(DC_DISP_DISP_MEM_HIGH_PRIORITY_TIMER),
1499 DEBUGFS_REG32(DC_DISP_DISP_TIMING_OPTIONS),
1500 DEBUGFS_REG32(DC_DISP_REF_TO_SYNC),
1501 DEBUGFS_REG32(DC_DISP_SYNC_WIDTH),
1502 DEBUGFS_REG32(DC_DISP_BACK_PORCH),
1503 DEBUGFS_REG32(DC_DISP_ACTIVE),
1504 DEBUGFS_REG32(DC_DISP_FRONT_PORCH),
1505 DEBUGFS_REG32(DC_DISP_H_PULSE0_CONTROL),
1506 DEBUGFS_REG32(DC_DISP_H_PULSE0_POSITION_A),
1507 DEBUGFS_REG32(DC_DISP_H_PULSE0_POSITION_B),
1508 DEBUGFS_REG32(DC_DISP_H_PULSE0_POSITION_C),
1509 DEBUGFS_REG32(DC_DISP_H_PULSE0_POSITION_D),
1510 DEBUGFS_REG32(DC_DISP_H_PULSE1_CONTROL),
1511 DEBUGFS_REG32(DC_DISP_H_PULSE1_POSITION_A),
1512 DEBUGFS_REG32(DC_DISP_H_PULSE1_POSITION_B),
1513 DEBUGFS_REG32(DC_DISP_H_PULSE1_POSITION_C),
1514 DEBUGFS_REG32(DC_DISP_H_PULSE1_POSITION_D),
1515 DEBUGFS_REG32(DC_DISP_H_PULSE2_CONTROL),
1516 DEBUGFS_REG32(DC_DISP_H_PULSE2_POSITION_A),
1517 DEBUGFS_REG32(DC_DISP_H_PULSE2_POSITION_B),
1518 DEBUGFS_REG32(DC_DISP_H_PULSE2_POSITION_C),
1519 DEBUGFS_REG32(DC_DISP_H_PULSE2_POSITION_D),
1520 DEBUGFS_REG32(DC_DISP_V_PULSE0_CONTROL),
1521 DEBUGFS_REG32(DC_DISP_V_PULSE0_POSITION_A),
1522 DEBUGFS_REG32(DC_DISP_V_PULSE0_POSITION_B),
1523 DEBUGFS_REG32(DC_DISP_V_PULSE0_POSITION_C),
1524 DEBUGFS_REG32(DC_DISP_V_PULSE1_CONTROL),
1525 DEBUGFS_REG32(DC_DISP_V_PULSE1_POSITION_A),
1526 DEBUGFS_REG32(DC_DISP_V_PULSE1_POSITION_B),
1527 DEBUGFS_REG32(DC_DISP_V_PULSE1_POSITION_C),
1528 DEBUGFS_REG32(DC_DISP_V_PULSE2_CONTROL),
1529 DEBUGFS_REG32(DC_DISP_V_PULSE2_POSITION_A),
1530 DEBUGFS_REG32(DC_DISP_V_PULSE3_CONTROL),
1531 DEBUGFS_REG32(DC_DISP_V_PULSE3_POSITION_A),
1532 DEBUGFS_REG32(DC_DISP_M0_CONTROL),
1533 DEBUGFS_REG32(DC_DISP_M1_CONTROL),
1534 DEBUGFS_REG32(DC_DISP_DI_CONTROL),
1535 DEBUGFS_REG32(DC_DISP_PP_CONTROL),
1536 DEBUGFS_REG32(DC_DISP_PP_SELECT_A),
1537 DEBUGFS_REG32(DC_DISP_PP_SELECT_B),
1538 DEBUGFS_REG32(DC_DISP_PP_SELECT_C),
1539 DEBUGFS_REG32(DC_DISP_PP_SELECT_D),
1540 DEBUGFS_REG32(DC_DISP_DISP_CLOCK_CONTROL),
1541 DEBUGFS_REG32(DC_DISP_DISP_INTERFACE_CONTROL),
1542 DEBUGFS_REG32(DC_DISP_DISP_COLOR_CONTROL),
1543 DEBUGFS_REG32(DC_DISP_SHIFT_CLOCK_OPTIONS),
1544 DEBUGFS_REG32(DC_DISP_DATA_ENABLE_OPTIONS),
1545 DEBUGFS_REG32(DC_DISP_SERIAL_INTERFACE_OPTIONS),
1546 DEBUGFS_REG32(DC_DISP_LCD_SPI_OPTIONS),
1547 DEBUGFS_REG32(DC_DISP_BORDER_COLOR),
1548 DEBUGFS_REG32(DC_DISP_COLOR_KEY0_LOWER),
1549 DEBUGFS_REG32(DC_DISP_COLOR_KEY0_UPPER),
1550 DEBUGFS_REG32(DC_DISP_COLOR_KEY1_LOWER),
1551 DEBUGFS_REG32(DC_DISP_COLOR_KEY1_UPPER),
1552 DEBUGFS_REG32(DC_DISP_CURSOR_FOREGROUND),
1553 DEBUGFS_REG32(DC_DISP_CURSOR_BACKGROUND),
1554 DEBUGFS_REG32(DC_DISP_CURSOR_START_ADDR),
1555 DEBUGFS_REG32(DC_DISP_CURSOR_START_ADDR_NS),
1556 DEBUGFS_REG32(DC_DISP_CURSOR_POSITION),
1557 DEBUGFS_REG32(DC_DISP_CURSOR_POSITION_NS),
1558 DEBUGFS_REG32(DC_DISP_INIT_SEQ_CONTROL),
1559 DEBUGFS_REG32(DC_DISP_SPI_INIT_SEQ_DATA_A),
1560 DEBUGFS_REG32(DC_DISP_SPI_INIT_SEQ_DATA_B),
1561 DEBUGFS_REG32(DC_DISP_SPI_INIT_SEQ_DATA_C),
1562 DEBUGFS_REG32(DC_DISP_SPI_INIT_SEQ_DATA_D),
1563 DEBUGFS_REG32(DC_DISP_DC_MCCIF_FIFOCTRL),
1564 DEBUGFS_REG32(DC_DISP_MCCIF_DISPLAY0A_HYST),
1565 DEBUGFS_REG32(DC_DISP_MCCIF_DISPLAY0B_HYST),
1566 DEBUGFS_REG32(DC_DISP_MCCIF_DISPLAY1A_HYST),
1567 DEBUGFS_REG32(DC_DISP_MCCIF_DISPLAY1B_HYST),
1568 DEBUGFS_REG32(DC_DISP_DAC_CRT_CTRL),
1569 DEBUGFS_REG32(DC_DISP_DISP_MISC_CONTROL),
1570 DEBUGFS_REG32(DC_DISP_SD_CONTROL),
1571 DEBUGFS_REG32(DC_DISP_SD_CSC_COEFF),
1572 DEBUGFS_REG32(DC_DISP_SD_LUT(0)),
1573 DEBUGFS_REG32(DC_DISP_SD_LUT(1)),
1574 DEBUGFS_REG32(DC_DISP_SD_LUT(2)),
1575 DEBUGFS_REG32(DC_DISP_SD_LUT(3)),
1576 DEBUGFS_REG32(DC_DISP_SD_LUT(4)),
1577 DEBUGFS_REG32(DC_DISP_SD_LUT(5)),
1578 DEBUGFS_REG32(DC_DISP_SD_LUT(6)),
1579 DEBUGFS_REG32(DC_DISP_SD_LUT(7)),
1580 DEBUGFS_REG32(DC_DISP_SD_LUT(8)),
1581 DEBUGFS_REG32(DC_DISP_SD_FLICKER_CONTROL),
1582 DEBUGFS_REG32(DC_DISP_DC_PIXEL_COUNT),
1583 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(0)),
1584 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(1)),
1585 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(2)),
1586 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(3)),
1587 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(4)),
1588 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(5)),
1589 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(6)),
1590 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(7)),
1591 DEBUGFS_REG32(DC_DISP_SD_BL_TF(0)),
1592 DEBUGFS_REG32(DC_DISP_SD_BL_TF(1)),
1593 DEBUGFS_REG32(DC_DISP_SD_BL_TF(2)),
1594 DEBUGFS_REG32(DC_DISP_SD_BL_TF(3)),
1595 DEBUGFS_REG32(DC_DISP_SD_BL_CONTROL),
1596 DEBUGFS_REG32(DC_DISP_SD_HW_K_VALUES),
1597 DEBUGFS_REG32(DC_DISP_SD_MAN_K_VALUES),
1598 DEBUGFS_REG32(DC_DISP_CURSOR_START_ADDR_HI),
1599 DEBUGFS_REG32(DC_DISP_BLEND_CURSOR_CONTROL),
1600 DEBUGFS_REG32(DC_WIN_WIN_OPTIONS),
1601 DEBUGFS_REG32(DC_WIN_BYTE_SWAP),
1602 DEBUGFS_REG32(DC_WIN_BUFFER_CONTROL),
1603 DEBUGFS_REG32(DC_WIN_COLOR_DEPTH),
1604 DEBUGFS_REG32(DC_WIN_POSITION),
1605 DEBUGFS_REG32(DC_WIN_SIZE),
1606 DEBUGFS_REG32(DC_WIN_PRESCALED_SIZE),
1607 DEBUGFS_REG32(DC_WIN_H_INITIAL_DDA),
1608 DEBUGFS_REG32(DC_WIN_V_INITIAL_DDA),
1609 DEBUGFS_REG32(DC_WIN_DDA_INC),
1610 DEBUGFS_REG32(DC_WIN_LINE_STRIDE),
1611 DEBUGFS_REG32(DC_WIN_BUF_STRIDE),
1612 DEBUGFS_REG32(DC_WIN_UV_BUF_STRIDE),
1613 DEBUGFS_REG32(DC_WIN_BUFFER_ADDR_MODE),
1614 DEBUGFS_REG32(DC_WIN_DV_CONTROL),
1615 DEBUGFS_REG32(DC_WIN_BLEND_NOKEY),
1616 DEBUGFS_REG32(DC_WIN_BLEND_1WIN),
1617 DEBUGFS_REG32(DC_WIN_BLEND_2WIN_X),
1618 DEBUGFS_REG32(DC_WIN_BLEND_2WIN_Y),
1619 DEBUGFS_REG32(DC_WIN_BLEND_3WIN_XY),
1620 DEBUGFS_REG32(DC_WIN_HP_FETCH_CONTROL),
1621 DEBUGFS_REG32(DC_WINBUF_START_ADDR),
1622 DEBUGFS_REG32(DC_WINBUF_START_ADDR_NS),
1623 DEBUGFS_REG32(DC_WINBUF_START_ADDR_U),
1624 DEBUGFS_REG32(DC_WINBUF_START_ADDR_U_NS),
1625 DEBUGFS_REG32(DC_WINBUF_START_ADDR_V),
1626 DEBUGFS_REG32(DC_WINBUF_START_ADDR_V_NS),
1627 DEBUGFS_REG32(DC_WINBUF_ADDR_H_OFFSET),
1628 DEBUGFS_REG32(DC_WINBUF_ADDR_H_OFFSET_NS),
1629 DEBUGFS_REG32(DC_WINBUF_ADDR_V_OFFSET),
1630 DEBUGFS_REG32(DC_WINBUF_ADDR_V_OFFSET_NS),
1631 DEBUGFS_REG32(DC_WINBUF_UFLOW_STATUS),
1632 DEBUGFS_REG32(DC_WINBUF_AD_UFLOW_STATUS),
1633 DEBUGFS_REG32(DC_WINBUF_BD_UFLOW_STATUS),
1634 DEBUGFS_REG32(DC_WINBUF_CD_UFLOW_STATUS),
1635};
1636
1637static int tegra_dc_show_regs(struct seq_file *s, void *data)
1638{
1639 struct drm_info_node *node = s->private;
1640 struct tegra_dc *dc = node->info_ent->data;
1641 unsigned int i;
1642 int err = 0;
1643
1644 drm_modeset_lock(&dc->base.mutex, NULL);
1645
1646 if (!dc->base.state->active) {
1647 err = -EBUSY;
1648 goto unlock;
1649 }
1650
1651 for (i = 0; i < ARRAY_SIZE(tegra_dc_regs); i++) {
1652 unsigned int offset = tegra_dc_regs[i].offset;
1653
1654 seq_printf(s, "%-40s %#05x %08x\n", tegra_dc_regs[i].name,
1655 offset, tegra_dc_readl(dc, offset));
1656 }
1657
1658unlock:
1659 drm_modeset_unlock(&dc->base.mutex);
1660 return err;
1661}
1662
1663static int tegra_dc_show_crc(struct seq_file *s, void *data)
1664{
1665 struct drm_info_node *node = s->private;
1666 struct tegra_dc *dc = node->info_ent->data;
1667 int err = 0;
1668 u32 value;
1669
1670 drm_modeset_lock(&dc->base.mutex, NULL);
1671
1672 if (!dc->base.state->active) {
1673 err = -EBUSY;
1674 goto unlock;
1675 }
1676
1677 value = DC_COM_CRC_CONTROL_ACTIVE_DATA | DC_COM_CRC_CONTROL_ENABLE;
1678 tegra_dc_writel(dc, value, DC_COM_CRC_CONTROL);
1679 tegra_dc_commit(dc);
1680
1681 drm_crtc_wait_one_vblank(&dc->base);
1682 drm_crtc_wait_one_vblank(&dc->base);
1683
1684 value = tegra_dc_readl(dc, DC_COM_CRC_CHECKSUM);
1685 seq_printf(s, "%08x\n", value);
1686
1687 tegra_dc_writel(dc, 0, DC_COM_CRC_CONTROL);
1688
1689unlock:
1690 drm_modeset_unlock(&dc->base.mutex);
1691 return err;
1692}
1693
1694static int tegra_dc_show_stats(struct seq_file *s, void *data)
1695{
1696 struct drm_info_node *node = s->private;
1697 struct tegra_dc *dc = node->info_ent->data;
1698
1699 seq_printf(s, "frames: %lu\n", dc->stats.frames);
1700 seq_printf(s, "vblank: %lu\n", dc->stats.vblank);
1701 seq_printf(s, "underflow: %lu\n", dc->stats.underflow);
1702 seq_printf(s, "overflow: %lu\n", dc->stats.overflow);
1703
1704 seq_printf(s, "frames total: %lu\n", dc->stats.frames_total);
1705 seq_printf(s, "vblank total: %lu\n", dc->stats.vblank_total);
1706 seq_printf(s, "underflow total: %lu\n", dc->stats.underflow_total);
1707 seq_printf(s, "overflow total: %lu\n", dc->stats.overflow_total);
1708
1709 return 0;
1710}
1711
1712static struct drm_info_list debugfs_files[] = {
1713 { "regs", tegra_dc_show_regs, 0, NULL },
1714 { "crc", tegra_dc_show_crc, 0, NULL },
1715 { "stats", tegra_dc_show_stats, 0, NULL },
1716};
1717
1718static int tegra_dc_late_register(struct drm_crtc *crtc)
1719{
1720 unsigned int i, count = ARRAY_SIZE(debugfs_files);
1721 struct drm_minor *minor = crtc->dev->primary;
1722 struct dentry *root;
1723 struct tegra_dc *dc = to_tegra_dc(crtc);
1724
1725#ifdef CONFIG_DEBUG_FS
1726 root = crtc->debugfs_entry;
1727#else
1728 root = NULL;
1729#endif
1730
1731 dc->debugfs_files = kmemdup(debugfs_files, sizeof(debugfs_files),
1732 GFP_KERNEL);
1733 if (!dc->debugfs_files)
1734 return -ENOMEM;
1735
1736 for (i = 0; i < count; i++)
1737 dc->debugfs_files[i].data = dc;
1738
1739 drm_debugfs_create_files(dc->debugfs_files, count, root, minor);
1740
1741 return 0;
1742}
1743
1744static void tegra_dc_early_unregister(struct drm_crtc *crtc)
1745{
1746 unsigned int count = ARRAY_SIZE(debugfs_files);
1747 struct drm_minor *minor = crtc->dev->primary;
1748 struct tegra_dc *dc = to_tegra_dc(crtc);
1749 struct dentry *root;
1750
1751#ifdef CONFIG_DEBUG_FS
1752 root = crtc->debugfs_entry;
1753#else
1754 root = NULL;
1755#endif
1756
1757 drm_debugfs_remove_files(dc->debugfs_files, count, root, minor);
1758 kfree(dc->debugfs_files);
1759 dc->debugfs_files = NULL;
1760}
1761
1762static u32 tegra_dc_get_vblank_counter(struct drm_crtc *crtc)
1763{
1764 struct tegra_dc *dc = to_tegra_dc(crtc);
1765
1766 /* XXX vblank syncpoints don't work with nvdisplay yet */
1767 if (dc->syncpt && !dc->soc->has_nvdisplay)
1768 return host1x_syncpt_read(dc->syncpt);
1769
1770 /* fallback to software emulated VBLANK counter */
1771 return (u32)drm_crtc_vblank_count(&dc->base);
1772}
1773
1774static int tegra_dc_enable_vblank(struct drm_crtc *crtc)
1775{
1776 struct tegra_dc *dc = to_tegra_dc(crtc);
1777 u32 value;
1778
1779 value = tegra_dc_readl(dc, DC_CMD_INT_MASK);
1780 value |= VBLANK_INT;
1781 tegra_dc_writel(dc, value, DC_CMD_INT_MASK);
1782
1783 return 0;
1784}
1785
1786static void tegra_dc_disable_vblank(struct drm_crtc *crtc)
1787{
1788 struct tegra_dc *dc = to_tegra_dc(crtc);
1789 u32 value;
1790
1791 value = tegra_dc_readl(dc, DC_CMD_INT_MASK);
1792 value &= ~VBLANK_INT;
1793 tegra_dc_writel(dc, value, DC_CMD_INT_MASK);
1794}
1795
1796static const struct drm_crtc_funcs tegra_crtc_funcs = {
1797 .page_flip = drm_atomic_helper_page_flip,
1798 .set_config = drm_atomic_helper_set_config,
1799 .destroy = tegra_dc_destroy,
1800 .reset = tegra_crtc_reset,
1801 .atomic_duplicate_state = tegra_crtc_atomic_duplicate_state,
1802 .atomic_destroy_state = tegra_crtc_atomic_destroy_state,
1803 .late_register = tegra_dc_late_register,
1804 .early_unregister = tegra_dc_early_unregister,
1805 .get_vblank_counter = tegra_dc_get_vblank_counter,
1806 .enable_vblank = tegra_dc_enable_vblank,
1807 .disable_vblank = tegra_dc_disable_vblank,
1808};
1809
1810static int tegra_dc_set_timings(struct tegra_dc *dc,
1811 struct drm_display_mode *mode)
1812{
1813 unsigned int h_ref_to_sync = 1;
1814 unsigned int v_ref_to_sync = 1;
1815 unsigned long value;
1816
1817 if (!dc->soc->has_nvdisplay) {
1818 tegra_dc_writel(dc, 0x0, DC_DISP_DISP_TIMING_OPTIONS);
1819
1820 value = (v_ref_to_sync << 16) | h_ref_to_sync;
1821 tegra_dc_writel(dc, value, DC_DISP_REF_TO_SYNC);
1822 }
1823
1824 value = ((mode->vsync_end - mode->vsync_start) << 16) |
1825 ((mode->hsync_end - mode->hsync_start) << 0);
1826 tegra_dc_writel(dc, value, DC_DISP_SYNC_WIDTH);
1827
1828 value = ((mode->vtotal - mode->vsync_end) << 16) |
1829 ((mode->htotal - mode->hsync_end) << 0);
1830 tegra_dc_writel(dc, value, DC_DISP_BACK_PORCH);
1831
1832 value = ((mode->vsync_start - mode->vdisplay) << 16) |
1833 ((mode->hsync_start - mode->hdisplay) << 0);
1834 tegra_dc_writel(dc, value, DC_DISP_FRONT_PORCH);
1835
1836 value = (mode->vdisplay << 16) | mode->hdisplay;
1837 tegra_dc_writel(dc, value, DC_DISP_ACTIVE);
1838
1839 return 0;
1840}
1841
1842/**
1843 * tegra_dc_state_setup_clock - check clock settings and store them in atomic
1844 * state
1845 * @dc: display controller
1846 * @crtc_state: CRTC atomic state
1847 * @clk: parent clock for display controller
1848 * @pclk: pixel clock
1849 * @div: shift clock divider
1850 *
1851 * Returns:
1852 * 0 on success or a negative error-code on failure.
1853 */
1854int tegra_dc_state_setup_clock(struct tegra_dc *dc,
1855 struct drm_crtc_state *crtc_state,
1856 struct clk *clk, unsigned long pclk,
1857 unsigned int div)
1858{
1859 struct tegra_dc_state *state = to_dc_state(crtc_state);
1860
1861 if (!clk_has_parent(dc->clk, clk))
1862 return -EINVAL;
1863
1864 state->clk = clk;
1865 state->pclk = pclk;
1866 state->div = div;
1867
1868 return 0;
1869}
1870
1871static void tegra_dc_update_voltage_state(struct tegra_dc *dc,
1872 struct tegra_dc_state *state)
1873{
1874 unsigned long rate, pstate;
1875 struct dev_pm_opp *opp;
1876 int err;
1877
1878 if (!dc->has_opp_table)
1879 return;
1880
1881 /* calculate actual pixel clock rate which depends on internal divider */
1882 rate = DIV_ROUND_UP(clk_get_rate(dc->clk) * 2, state->div + 2);
1883
1884 /* find suitable OPP for the rate */
1885 opp = dev_pm_opp_find_freq_ceil(dc->dev, &rate);
1886
1887 /*
1888 * Very high resolution modes may results in a clock rate that is
1889 * above the characterized maximum. In this case it's okay to fall
1890 * back to the characterized maximum.
1891 */
1892 if (opp == ERR_PTR(-ERANGE))
1893 opp = dev_pm_opp_find_freq_floor(dc->dev, &rate);
1894
1895 if (IS_ERR(opp)) {
1896 dev_err(dc->dev, "failed to find OPP for %luHz: %pe\n",
1897 rate, opp);
1898 return;
1899 }
1900
1901 pstate = dev_pm_opp_get_required_pstate(opp, 0);
1902 dev_pm_opp_put(opp);
1903
1904 /*
1905 * The minimum core voltage depends on the pixel clock rate (which
1906 * depends on internal clock divider of the CRTC) and not on the
1907 * rate of the display controller clock. This is why we're not using
1908 * dev_pm_opp_set_rate() API and instead controlling the power domain
1909 * directly.
1910 */
1911 err = dev_pm_genpd_set_performance_state(dc->dev, pstate);
1912 if (err)
1913 dev_err(dc->dev, "failed to set power domain state to %lu: %d\n",
1914 pstate, err);
1915}
1916
1917static void tegra_dc_set_clock_rate(struct tegra_dc *dc,
1918 struct tegra_dc_state *state)
1919{
1920 int err;
1921
1922 err = clk_set_parent(dc->clk, state->clk);
1923 if (err < 0)
1924 dev_err(dc->dev, "failed to set parent clock: %d\n", err);
1925
1926 /*
1927 * Outputs may not want to change the parent clock rate. This is only
1928 * relevant to Tegra20 where only a single display PLL is available.
1929 * Since that PLL would typically be used for HDMI, an internal LVDS
1930 * panel would need to be driven by some other clock such as PLL_P
1931 * which is shared with other peripherals. Changing the clock rate
1932 * should therefore be avoided.
1933 */
1934 if (state->pclk > 0) {
1935 err = clk_set_rate(state->clk, state->pclk);
1936 if (err < 0)
1937 dev_err(dc->dev,
1938 "failed to set clock rate to %lu Hz\n",
1939 state->pclk);
1940
1941 err = clk_set_rate(dc->clk, state->pclk);
1942 if (err < 0)
1943 dev_err(dc->dev, "failed to set clock %pC to %lu Hz: %d\n",
1944 dc->clk, state->pclk, err);
1945 }
1946
1947 DRM_DEBUG_KMS("rate: %lu, div: %u\n", clk_get_rate(dc->clk),
1948 state->div);
1949 DRM_DEBUG_KMS("pclk: %lu\n", state->pclk);
1950
1951 tegra_dc_update_voltage_state(dc, state);
1952}
1953
1954static void tegra_dc_stop(struct tegra_dc *dc)
1955{
1956 u32 value;
1957
1958 /* stop the display controller */
1959 value = tegra_dc_readl(dc, DC_CMD_DISPLAY_COMMAND);
1960 value &= ~DISP_CTRL_MODE_MASK;
1961 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_COMMAND);
1962
1963 tegra_dc_commit(dc);
1964}
1965
1966static bool tegra_dc_idle(struct tegra_dc *dc)
1967{
1968 u32 value;
1969
1970 value = tegra_dc_readl_active(dc, DC_CMD_DISPLAY_COMMAND);
1971
1972 return (value & DISP_CTRL_MODE_MASK) == 0;
1973}
1974
1975static int tegra_dc_wait_idle(struct tegra_dc *dc, unsigned long timeout)
1976{
1977 timeout = jiffies + msecs_to_jiffies(timeout);
1978
1979 while (time_before(jiffies, timeout)) {
1980 if (tegra_dc_idle(dc))
1981 return 0;
1982
1983 usleep_range(1000, 2000);
1984 }
1985
1986 dev_dbg(dc->dev, "timeout waiting for DC to become idle\n");
1987 return -ETIMEDOUT;
1988}
1989
1990static void
1991tegra_crtc_update_memory_bandwidth(struct drm_crtc *crtc,
1992 struct drm_atomic_state *state,
1993 bool prepare_bandwidth_transition)
1994{
1995 const struct tegra_plane_state *old_tegra_state, *new_tegra_state;
1996 u32 i, new_avg_bw, old_avg_bw, new_peak_bw, old_peak_bw;
1997 const struct drm_plane_state *old_plane_state;
1998 const struct drm_crtc_state *old_crtc_state;
1999 struct tegra_dc_window window, old_window;
2000 struct tegra_dc *dc = to_tegra_dc(crtc);
2001 struct tegra_plane *tegra;
2002 struct drm_plane *plane;
2003
2004 if (dc->soc->has_nvdisplay)
2005 return;
2006
2007 old_crtc_state = drm_atomic_get_old_crtc_state(state, crtc);
2008
2009 if (!crtc->state->active) {
2010 if (!old_crtc_state->active)
2011 return;
2012
2013 /*
2014 * When CRTC is disabled on DPMS, the state of attached planes
2015 * is kept unchanged. Hence we need to enforce removal of the
2016 * bandwidths from the ICC paths.
2017 */
2018 drm_atomic_crtc_for_each_plane(plane, crtc) {
2019 tegra = to_tegra_plane(plane);
2020
2021 icc_set_bw(tegra->icc_mem, 0, 0);
2022 icc_set_bw(tegra->icc_mem_vfilter, 0, 0);
2023 }
2024
2025 return;
2026 }
2027
2028 for_each_old_plane_in_state(old_crtc_state->state, plane,
2029 old_plane_state, i) {
2030 old_tegra_state = to_const_tegra_plane_state(old_plane_state);
2031 new_tegra_state = to_const_tegra_plane_state(plane->state);
2032 tegra = to_tegra_plane(plane);
2033
2034 /*
2035 * We're iterating over the global atomic state and it contains
2036 * planes from another CRTC, hence we need to filter out the
2037 * planes unrelated to this CRTC.
2038 */
2039 if (tegra->dc != dc)
2040 continue;
2041
2042 new_avg_bw = new_tegra_state->avg_memory_bandwidth;
2043 old_avg_bw = old_tegra_state->avg_memory_bandwidth;
2044
2045 new_peak_bw = new_tegra_state->total_peak_memory_bandwidth;
2046 old_peak_bw = old_tegra_state->total_peak_memory_bandwidth;
2047
2048 /*
2049 * See the comment related to !crtc->state->active above,
2050 * which explains why bandwidths need to be updated when
2051 * CRTC is turning ON.
2052 */
2053 if (new_avg_bw == old_avg_bw && new_peak_bw == old_peak_bw &&
2054 old_crtc_state->active)
2055 continue;
2056
2057 window.src.h = drm_rect_height(&plane->state->src) >> 16;
2058 window.dst.h = drm_rect_height(&plane->state->dst);
2059
2060 old_window.src.h = drm_rect_height(&old_plane_state->src) >> 16;
2061 old_window.dst.h = drm_rect_height(&old_plane_state->dst);
2062
2063 /*
2064 * During the preparation phase (atomic_begin), the memory
2065 * freq should go high before the DC changes are committed
2066 * if bandwidth requirement goes up, otherwise memory freq
2067 * should to stay high if BW requirement goes down. The
2068 * opposite applies to the completion phase (post_commit).
2069 */
2070 if (prepare_bandwidth_transition) {
2071 new_avg_bw = max(old_avg_bw, new_avg_bw);
2072 new_peak_bw = max(old_peak_bw, new_peak_bw);
2073
2074 if (tegra_plane_use_vertical_filtering(tegra, &old_window))
2075 window = old_window;
2076 }
2077
2078 icc_set_bw(tegra->icc_mem, new_avg_bw, new_peak_bw);
2079
2080 if (tegra_plane_use_vertical_filtering(tegra, &window))
2081 icc_set_bw(tegra->icc_mem_vfilter, new_avg_bw, new_peak_bw);
2082 else
2083 icc_set_bw(tegra->icc_mem_vfilter, 0, 0);
2084 }
2085}
2086
2087static void tegra_crtc_atomic_disable(struct drm_crtc *crtc,
2088 struct drm_atomic_state *state)
2089{
2090 struct tegra_dc *dc = to_tegra_dc(crtc);
2091 u32 value;
2092 int err;
2093
2094 if (!tegra_dc_idle(dc)) {
2095 tegra_dc_stop(dc);
2096
2097 /*
2098 * Ignore the return value, there isn't anything useful to do
2099 * in case this fails.
2100 */
2101 tegra_dc_wait_idle(dc, 100);
2102 }
2103
2104 /*
2105 * This should really be part of the RGB encoder driver, but clearing
2106 * these bits has the side-effect of stopping the display controller.
2107 * When that happens no VBLANK interrupts will be raised. At the same
2108 * time the encoder is disabled before the display controller, so the
2109 * above code is always going to timeout waiting for the controller
2110 * to go idle.
2111 *
2112 * Given the close coupling between the RGB encoder and the display
2113 * controller doing it here is still kind of okay. None of the other
2114 * encoder drivers require these bits to be cleared.
2115 *
2116 * XXX: Perhaps given that the display controller is switched off at
2117 * this point anyway maybe clearing these bits isn't even useful for
2118 * the RGB encoder?
2119 */
2120 if (dc->rgb) {
2121 value = tegra_dc_readl(dc, DC_CMD_DISPLAY_POWER_CONTROL);
2122 value &= ~(PW0_ENABLE | PW1_ENABLE | PW2_ENABLE | PW3_ENABLE |
2123 PW4_ENABLE | PM0_ENABLE | PM1_ENABLE);
2124 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_POWER_CONTROL);
2125 }
2126
2127 tegra_dc_stats_reset(&dc->stats);
2128 drm_crtc_vblank_off(crtc);
2129
2130 spin_lock_irq(&crtc->dev->event_lock);
2131
2132 if (crtc->state->event) {
2133 drm_crtc_send_vblank_event(crtc, crtc->state->event);
2134 crtc->state->event = NULL;
2135 }
2136
2137 spin_unlock_irq(&crtc->dev->event_lock);
2138
2139 err = host1x_client_suspend(&dc->client);
2140 if (err < 0)
2141 dev_err(dc->dev, "failed to suspend: %d\n", err);
2142
2143 if (dc->has_opp_table) {
2144 err = dev_pm_genpd_set_performance_state(dc->dev, 0);
2145 if (err)
2146 dev_err(dc->dev,
2147 "failed to clear power domain state: %d\n", err);
2148 }
2149}
2150
2151static void tegra_crtc_atomic_enable(struct drm_crtc *crtc,
2152 struct drm_atomic_state *state)
2153{
2154 struct drm_display_mode *mode = &crtc->state->adjusted_mode;
2155 struct tegra_dc_state *crtc_state = to_dc_state(crtc->state);
2156 struct tegra_dc *dc = to_tegra_dc(crtc);
2157 u32 value;
2158 int err;
2159
2160 /* apply PLL changes */
2161 tegra_dc_set_clock_rate(dc, crtc_state);
2162
2163 err = host1x_client_resume(&dc->client);
2164 if (err < 0) {
2165 dev_err(dc->dev, "failed to resume: %d\n", err);
2166 return;
2167 }
2168
2169 /* initialize display controller */
2170 if (dc->syncpt) {
2171 u32 syncpt = host1x_syncpt_id(dc->syncpt), enable;
2172
2173 if (dc->soc->has_nvdisplay)
2174 enable = 1 << 31;
2175 else
2176 enable = 1 << 8;
2177
2178 value = SYNCPT_CNTRL_NO_STALL;
2179 tegra_dc_writel(dc, value, DC_CMD_GENERAL_INCR_SYNCPT_CNTRL);
2180
2181 value = enable | syncpt;
2182 tegra_dc_writel(dc, value, DC_CMD_CONT_SYNCPT_VSYNC);
2183 }
2184
2185 if (dc->soc->has_nvdisplay) {
2186 value = DSC_TO_UF_INT | DSC_BBUF_UF_INT | DSC_RBUF_UF_INT |
2187 DSC_OBUF_UF_INT;
2188 tegra_dc_writel(dc, value, DC_CMD_INT_TYPE);
2189
2190 value = DSC_TO_UF_INT | DSC_BBUF_UF_INT | DSC_RBUF_UF_INT |
2191 DSC_OBUF_UF_INT | SD3_BUCKET_WALK_DONE_INT |
2192 HEAD_UF_INT | MSF_INT | REG_TMOUT_INT |
2193 REGION_CRC_INT | V_PULSE2_INT | V_PULSE3_INT |
2194 VBLANK_INT | FRAME_END_INT;
2195 tegra_dc_writel(dc, value, DC_CMD_INT_POLARITY);
2196
2197 value = SD3_BUCKET_WALK_DONE_INT | HEAD_UF_INT | VBLANK_INT |
2198 FRAME_END_INT;
2199 tegra_dc_writel(dc, value, DC_CMD_INT_ENABLE);
2200
2201 value = HEAD_UF_INT | REG_TMOUT_INT | FRAME_END_INT;
2202 tegra_dc_writel(dc, value, DC_CMD_INT_MASK);
2203
2204 tegra_dc_writel(dc, READ_MUX, DC_CMD_STATE_ACCESS);
2205 } else {
2206 value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT |
2207 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT;
2208 tegra_dc_writel(dc, value, DC_CMD_INT_TYPE);
2209
2210 value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT |
2211 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT;
2212 tegra_dc_writel(dc, value, DC_CMD_INT_POLARITY);
2213
2214 /* initialize timer */
2215 value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(0x20) |
2216 WINDOW_B_THRESHOLD(0x20) | WINDOW_C_THRESHOLD(0x20);
2217 tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY);
2218
2219 value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(1) |
2220 WINDOW_B_THRESHOLD(1) | WINDOW_C_THRESHOLD(1);
2221 tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY_TIMER);
2222
2223 value = VBLANK_INT | WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT |
2224 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT;
2225 tegra_dc_writel(dc, value, DC_CMD_INT_ENABLE);
2226
2227 value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT |
2228 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT;
2229 tegra_dc_writel(dc, value, DC_CMD_INT_MASK);
2230 }
2231
2232 if (dc->soc->supports_background_color)
2233 tegra_dc_writel(dc, 0, DC_DISP_BLEND_BACKGROUND_COLOR);
2234 else
2235 tegra_dc_writel(dc, 0, DC_DISP_BORDER_COLOR);
2236
2237 /* apply pixel clock changes */
2238 if (!dc->soc->has_nvdisplay) {
2239 value = SHIFT_CLK_DIVIDER(crtc_state->div) | PIXEL_CLK_DIVIDER_PCD1;
2240 tegra_dc_writel(dc, value, DC_DISP_DISP_CLOCK_CONTROL);
2241 }
2242
2243 /* program display mode */
2244 tegra_dc_set_timings(dc, mode);
2245
2246 /* interlacing isn't supported yet, so disable it */
2247 if (dc->soc->supports_interlacing) {
2248 value = tegra_dc_readl(dc, DC_DISP_INTERLACE_CONTROL);
2249 value &= ~INTERLACE_ENABLE;
2250 tegra_dc_writel(dc, value, DC_DISP_INTERLACE_CONTROL);
2251 }
2252
2253 value = tegra_dc_readl(dc, DC_CMD_DISPLAY_COMMAND);
2254 value &= ~DISP_CTRL_MODE_MASK;
2255 value |= DISP_CTRL_MODE_C_DISPLAY;
2256 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_COMMAND);
2257
2258 if (!dc->soc->has_nvdisplay) {
2259 value = tegra_dc_readl(dc, DC_CMD_DISPLAY_POWER_CONTROL);
2260 value |= PW0_ENABLE | PW1_ENABLE | PW2_ENABLE | PW3_ENABLE |
2261 PW4_ENABLE | PM0_ENABLE | PM1_ENABLE;
2262 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_POWER_CONTROL);
2263 }
2264
2265 /* enable underflow reporting and display red for missing pixels */
2266 if (dc->soc->has_nvdisplay) {
2267 value = UNDERFLOW_MODE_RED | UNDERFLOW_REPORT_ENABLE;
2268 tegra_dc_writel(dc, value, DC_COM_RG_UNDERFLOW);
2269 }
2270
2271 if (dc->rgb) {
2272 /* XXX: parameterize? */
2273 value = SC0_H_QUALIFIER_NONE | SC1_H_QUALIFIER_NONE;
2274 tegra_dc_writel(dc, value, DC_DISP_SHIFT_CLOCK_OPTIONS);
2275 }
2276
2277 tegra_dc_commit(dc);
2278
2279 drm_crtc_vblank_on(crtc);
2280}
2281
2282static void tegra_crtc_atomic_begin(struct drm_crtc *crtc,
2283 struct drm_atomic_state *state)
2284{
2285 unsigned long flags;
2286
2287 tegra_crtc_update_memory_bandwidth(crtc, state, true);
2288
2289 if (crtc->state->event) {
2290 spin_lock_irqsave(&crtc->dev->event_lock, flags);
2291
2292 if (drm_crtc_vblank_get(crtc) != 0)
2293 drm_crtc_send_vblank_event(crtc, crtc->state->event);
2294 else
2295 drm_crtc_arm_vblank_event(crtc, crtc->state->event);
2296
2297 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
2298
2299 crtc->state->event = NULL;
2300 }
2301}
2302
2303static void tegra_crtc_atomic_flush(struct drm_crtc *crtc,
2304 struct drm_atomic_state *state)
2305{
2306 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
2307 crtc);
2308 struct tegra_dc_state *dc_state = to_dc_state(crtc_state);
2309 struct tegra_dc *dc = to_tegra_dc(crtc);
2310 u32 value;
2311
2312 value = dc_state->planes << 8 | GENERAL_UPDATE;
2313 tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL);
2314 value = tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
2315
2316 value = dc_state->planes | GENERAL_ACT_REQ;
2317 tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL);
2318 value = tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
2319}
2320
2321static bool tegra_plane_is_cursor(const struct drm_plane_state *state)
2322{
2323 const struct tegra_dc_soc_info *soc = to_tegra_dc(state->crtc)->soc;
2324 const struct drm_format_info *fmt = state->fb->format;
2325 unsigned int src_w = drm_rect_width(&state->src) >> 16;
2326 unsigned int dst_w = drm_rect_width(&state->dst);
2327
2328 if (state->plane->type != DRM_PLANE_TYPE_CURSOR)
2329 return false;
2330
2331 if (soc->supports_cursor)
2332 return true;
2333
2334 if (src_w != dst_w || fmt->num_planes != 1 || src_w * fmt->cpp[0] > 256)
2335 return false;
2336
2337 return true;
2338}
2339
2340static unsigned long
2341tegra_plane_overlap_mask(struct drm_crtc_state *state,
2342 const struct drm_plane_state *plane_state)
2343{
2344 const struct drm_plane_state *other_state;
2345 const struct tegra_plane *tegra;
2346 unsigned long overlap_mask = 0;
2347 struct drm_plane *plane;
2348 struct drm_rect rect;
2349
2350 if (!plane_state->visible || !plane_state->fb)
2351 return 0;
2352
2353 /*
2354 * Data-prefetch FIFO will easily help to overcome temporal memory
2355 * pressure if other plane overlaps with the cursor plane.
2356 */
2357 if (tegra_plane_is_cursor(plane_state))
2358 return 0;
2359
2360 drm_atomic_crtc_state_for_each_plane_state(plane, other_state, state) {
2361 rect = plane_state->dst;
2362
2363 tegra = to_tegra_plane(other_state->plane);
2364
2365 if (!other_state->visible || !other_state->fb)
2366 continue;
2367
2368 /*
2369 * Ignore cursor plane overlaps because it's not practical to
2370 * assume that it contributes to the bandwidth in overlapping
2371 * area if window width is small.
2372 */
2373 if (tegra_plane_is_cursor(other_state))
2374 continue;
2375
2376 if (drm_rect_intersect(&rect, &other_state->dst))
2377 overlap_mask |= BIT(tegra->index);
2378 }
2379
2380 return overlap_mask;
2381}
2382
2383static int tegra_crtc_calculate_memory_bandwidth(struct drm_crtc *crtc,
2384 struct drm_atomic_state *state)
2385{
2386 ulong overlap_mask[TEGRA_DC_LEGACY_PLANES_NUM] = {}, mask;
2387 u32 plane_peak_bw[TEGRA_DC_LEGACY_PLANES_NUM] = {};
2388 bool all_planes_overlap_simultaneously = true;
2389 const struct tegra_plane_state *tegra_state;
2390 const struct drm_plane_state *plane_state;
2391 struct tegra_dc *dc = to_tegra_dc(crtc);
2392 struct drm_crtc_state *new_state;
2393 struct tegra_plane *tegra;
2394 struct drm_plane *plane;
2395
2396 /*
2397 * The nv-display uses shared planes. The algorithm below assumes
2398 * maximum 3 planes per-CRTC, this assumption isn't applicable to
2399 * the nv-display. Note that T124 support has additional windows,
2400 * but currently they aren't supported by the driver.
2401 */
2402 if (dc->soc->has_nvdisplay)
2403 return 0;
2404
2405 new_state = drm_atomic_get_new_crtc_state(state, crtc);
2406
2407 /*
2408 * For overlapping planes pixel's data is fetched for each plane at
2409 * the same time, hence bandwidths are accumulated in this case.
2410 * This needs to be taken into account for calculating total bandwidth
2411 * consumed by all planes.
2412 *
2413 * Here we get the overlapping state of each plane, which is a
2414 * bitmask of plane indices telling with what planes there is an
2415 * overlap. Note that bitmask[plane] includes BIT(plane) in order
2416 * to make further code nicer and simpler.
2417 */
2418 drm_atomic_crtc_state_for_each_plane_state(plane, plane_state, new_state) {
2419 tegra_state = to_const_tegra_plane_state(plane_state);
2420 tegra = to_tegra_plane(plane);
2421
2422 if (WARN_ON_ONCE(tegra->index >= TEGRA_DC_LEGACY_PLANES_NUM))
2423 return -EINVAL;
2424
2425 plane_peak_bw[tegra->index] = tegra_state->peak_memory_bandwidth;
2426 mask = tegra_plane_overlap_mask(new_state, plane_state);
2427 overlap_mask[tegra->index] = mask;
2428
2429 if (hweight_long(mask) != 3)
2430 all_planes_overlap_simultaneously = false;
2431 }
2432
2433 /*
2434 * Then we calculate maximum bandwidth of each plane state.
2435 * The bandwidth includes the plane BW + BW of the "simultaneously"
2436 * overlapping planes, where "simultaneously" means areas where DC
2437 * fetches from the planes simultaneously during of scan-out process.
2438 *
2439 * For example, if plane A overlaps with planes B and C, but B and C
2440 * don't overlap, then the peak bandwidth will be either in area where
2441 * A-and-B or A-and-C planes overlap.
2442 *
2443 * The plane_peak_bw[] contains peak memory bandwidth values of
2444 * each plane, this information is needed by interconnect provider
2445 * in order to set up latency allowance based on the peak BW, see
2446 * tegra_crtc_update_memory_bandwidth().
2447 */
2448 drm_atomic_crtc_state_for_each_plane_state(plane, plane_state, new_state) {
2449 u32 i, old_peak_bw, new_peak_bw, overlap_bw = 0;
2450
2451 /*
2452 * Note that plane's atomic check doesn't touch the
2453 * total_peak_memory_bandwidth of enabled plane, hence the
2454 * current state contains the old bandwidth state from the
2455 * previous CRTC commit.
2456 */
2457 tegra_state = to_const_tegra_plane_state(plane_state);
2458 tegra = to_tegra_plane(plane);
2459
2460 for_each_set_bit(i, &overlap_mask[tegra->index], 3) {
2461 if (i == tegra->index)
2462 continue;
2463
2464 if (all_planes_overlap_simultaneously)
2465 overlap_bw += plane_peak_bw[i];
2466 else
2467 overlap_bw = max(overlap_bw, plane_peak_bw[i]);
2468 }
2469
2470 new_peak_bw = plane_peak_bw[tegra->index] + overlap_bw;
2471 old_peak_bw = tegra_state->total_peak_memory_bandwidth;
2472
2473 /*
2474 * If plane's peak bandwidth changed (for example plane isn't
2475 * overlapped anymore) and plane isn't in the atomic state,
2476 * then add plane to the state in order to have the bandwidth
2477 * updated.
2478 */
2479 if (old_peak_bw != new_peak_bw) {
2480 struct tegra_plane_state *new_tegra_state;
2481 struct drm_plane_state *new_plane_state;
2482
2483 new_plane_state = drm_atomic_get_plane_state(state, plane);
2484 if (IS_ERR(new_plane_state))
2485 return PTR_ERR(new_plane_state);
2486
2487 new_tegra_state = to_tegra_plane_state(new_plane_state);
2488 new_tegra_state->total_peak_memory_bandwidth = new_peak_bw;
2489 }
2490 }
2491
2492 return 0;
2493}
2494
2495static int tegra_crtc_atomic_check(struct drm_crtc *crtc,
2496 struct drm_atomic_state *state)
2497{
2498 int err;
2499
2500 err = tegra_crtc_calculate_memory_bandwidth(crtc, state);
2501 if (err)
2502 return err;
2503
2504 return 0;
2505}
2506
2507void tegra_crtc_atomic_post_commit(struct drm_crtc *crtc,
2508 struct drm_atomic_state *state)
2509{
2510 /*
2511 * Display bandwidth is allowed to go down only once hardware state
2512 * is known to be armed, i.e. state was committed and VBLANK event
2513 * received.
2514 */
2515 tegra_crtc_update_memory_bandwidth(crtc, state, false);
2516}
2517
2518static const struct drm_crtc_helper_funcs tegra_crtc_helper_funcs = {
2519 .atomic_check = tegra_crtc_atomic_check,
2520 .atomic_begin = tegra_crtc_atomic_begin,
2521 .atomic_flush = tegra_crtc_atomic_flush,
2522 .atomic_enable = tegra_crtc_atomic_enable,
2523 .atomic_disable = tegra_crtc_atomic_disable,
2524};
2525
2526static irqreturn_t tegra_dc_irq(int irq, void *data)
2527{
2528 struct tegra_dc *dc = data;
2529 unsigned long status;
2530
2531 status = tegra_dc_readl(dc, DC_CMD_INT_STATUS);
2532 tegra_dc_writel(dc, status, DC_CMD_INT_STATUS);
2533
2534 if (status & FRAME_END_INT) {
2535 /*
2536 dev_dbg(dc->dev, "%s(): frame end\n", __func__);
2537 */
2538 dc->stats.frames_total++;
2539 dc->stats.frames++;
2540 }
2541
2542 if (status & VBLANK_INT) {
2543 /*
2544 dev_dbg(dc->dev, "%s(): vertical blank\n", __func__);
2545 */
2546 drm_crtc_handle_vblank(&dc->base);
2547 dc->stats.vblank_total++;
2548 dc->stats.vblank++;
2549 }
2550
2551 if (status & (WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT)) {
2552 /*
2553 dev_dbg(dc->dev, "%s(): underflow\n", __func__);
2554 */
2555 dc->stats.underflow_total++;
2556 dc->stats.underflow++;
2557 }
2558
2559 if (status & (WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT)) {
2560 /*
2561 dev_dbg(dc->dev, "%s(): overflow\n", __func__);
2562 */
2563 dc->stats.overflow_total++;
2564 dc->stats.overflow++;
2565 }
2566
2567 if (status & HEAD_UF_INT) {
2568 dev_dbg_ratelimited(dc->dev, "%s(): head underflow\n", __func__);
2569 dc->stats.underflow_total++;
2570 dc->stats.underflow++;
2571 }
2572
2573 return IRQ_HANDLED;
2574}
2575
2576static bool tegra_dc_has_window_groups(struct tegra_dc *dc)
2577{
2578 unsigned int i;
2579
2580 if (!dc->soc->wgrps)
2581 return true;
2582
2583 for (i = 0; i < dc->soc->num_wgrps; i++) {
2584 const struct tegra_windowgroup_soc *wgrp = &dc->soc->wgrps[i];
2585
2586 if (wgrp->dc == dc->pipe && wgrp->num_windows > 0)
2587 return true;
2588 }
2589
2590 return false;
2591}
2592
2593static int tegra_dc_early_init(struct host1x_client *client)
2594{
2595 struct drm_device *drm = dev_get_drvdata(client->host);
2596 struct tegra_drm *tegra = drm->dev_private;
2597
2598 tegra->num_crtcs++;
2599
2600 return 0;
2601}
2602
2603static int tegra_dc_init(struct host1x_client *client)
2604{
2605 struct drm_device *drm = dev_get_drvdata(client->host);
2606 unsigned long flags = HOST1X_SYNCPT_CLIENT_MANAGED;
2607 struct tegra_dc *dc = host1x_client_to_dc(client);
2608 struct tegra_drm *tegra = drm->dev_private;
2609 struct drm_plane *primary = NULL;
2610 struct drm_plane *cursor = NULL;
2611 int err;
2612
2613 /*
2614 * DC has been reset by now, so VBLANK syncpoint can be released
2615 * for general use.
2616 */
2617 host1x_syncpt_release_vblank_reservation(client, 26 + dc->pipe);
2618
2619 /*
2620 * XXX do not register DCs with no window groups because we cannot
2621 * assign a primary plane to them, which in turn will cause KMS to
2622 * crash.
2623 */
2624 if (!tegra_dc_has_window_groups(dc))
2625 return 0;
2626
2627 /*
2628 * Set the display hub as the host1x client parent for the display
2629 * controller. This is needed for the runtime reference counting that
2630 * ensures the display hub is always powered when any of the display
2631 * controllers are.
2632 */
2633 if (dc->soc->has_nvdisplay)
2634 client->parent = &tegra->hub->client;
2635
2636 dc->syncpt = host1x_syncpt_request(client, flags);
2637 if (!dc->syncpt)
2638 dev_warn(dc->dev, "failed to allocate syncpoint\n");
2639
2640 err = host1x_client_iommu_attach(client);
2641 if (err < 0 && err != -ENODEV) {
2642 dev_err(client->dev, "failed to attach to domain: %d\n", err);
2643 return err;
2644 }
2645
2646 if (dc->soc->wgrps)
2647 primary = tegra_dc_add_shared_planes(drm, dc);
2648 else
2649 primary = tegra_dc_add_planes(drm, dc);
2650
2651 if (IS_ERR(primary)) {
2652 err = PTR_ERR(primary);
2653 goto cleanup;
2654 }
2655
2656 if (dc->soc->supports_cursor) {
2657 cursor = tegra_dc_cursor_plane_create(drm, dc);
2658 if (IS_ERR(cursor)) {
2659 err = PTR_ERR(cursor);
2660 goto cleanup;
2661 }
2662 } else {
2663 /* dedicate one overlay to mouse cursor */
2664 cursor = tegra_dc_overlay_plane_create(drm, dc, 2, true);
2665 if (IS_ERR(cursor)) {
2666 err = PTR_ERR(cursor);
2667 goto cleanup;
2668 }
2669 }
2670
2671 err = drm_crtc_init_with_planes(drm, &dc->base, primary, cursor,
2672 &tegra_crtc_funcs, NULL);
2673 if (err < 0)
2674 goto cleanup;
2675
2676 drm_crtc_helper_add(&dc->base, &tegra_crtc_helper_funcs);
2677
2678 /*
2679 * Keep track of the minimum pitch alignment across all display
2680 * controllers.
2681 */
2682 if (dc->soc->pitch_align > tegra->pitch_align)
2683 tegra->pitch_align = dc->soc->pitch_align;
2684
2685 /* track maximum resolution */
2686 if (dc->soc->has_nvdisplay)
2687 drm->mode_config.max_width = drm->mode_config.max_height = 16384;
2688 else
2689 drm->mode_config.max_width = drm->mode_config.max_height = 4096;
2690
2691 err = tegra_dc_rgb_init(drm, dc);
2692 if (err < 0 && err != -ENODEV) {
2693 dev_err(dc->dev, "failed to initialize RGB output: %d\n", err);
2694 goto cleanup;
2695 }
2696
2697 err = devm_request_irq(dc->dev, dc->irq, tegra_dc_irq, 0,
2698 dev_name(dc->dev), dc);
2699 if (err < 0) {
2700 dev_err(dc->dev, "failed to request IRQ#%u: %d\n", dc->irq,
2701 err);
2702 goto cleanup;
2703 }
2704
2705 /*
2706 * Inherit the DMA parameters (such as maximum segment size) from the
2707 * parent host1x device.
2708 */
2709 client->dev->dma_parms = client->host->dma_parms;
2710
2711 return 0;
2712
2713cleanup:
2714 if (!IS_ERR_OR_NULL(cursor))
2715 drm_plane_cleanup(cursor);
2716
2717 if (!IS_ERR(primary))
2718 drm_plane_cleanup(primary);
2719
2720 host1x_client_iommu_detach(client);
2721 host1x_syncpt_put(dc->syncpt);
2722
2723 return err;
2724}
2725
2726static int tegra_dc_exit(struct host1x_client *client)
2727{
2728 struct tegra_dc *dc = host1x_client_to_dc(client);
2729 int err;
2730
2731 if (!tegra_dc_has_window_groups(dc))
2732 return 0;
2733
2734 /* avoid a dangling pointer just in case this disappears */
2735 client->dev->dma_parms = NULL;
2736
2737 devm_free_irq(dc->dev, dc->irq, dc);
2738
2739 err = tegra_dc_rgb_exit(dc);
2740 if (err) {
2741 dev_err(dc->dev, "failed to shutdown RGB output: %d\n", err);
2742 return err;
2743 }
2744
2745 host1x_client_iommu_detach(client);
2746 host1x_syncpt_put(dc->syncpt);
2747
2748 return 0;
2749}
2750
2751static int tegra_dc_late_exit(struct host1x_client *client)
2752{
2753 struct drm_device *drm = dev_get_drvdata(client->host);
2754 struct tegra_drm *tegra = drm->dev_private;
2755
2756 tegra->num_crtcs--;
2757
2758 return 0;
2759}
2760
2761static int tegra_dc_runtime_suspend(struct host1x_client *client)
2762{
2763 struct tegra_dc *dc = host1x_client_to_dc(client);
2764 struct device *dev = client->dev;
2765 int err;
2766
2767 err = reset_control_assert(dc->rst);
2768 if (err < 0) {
2769 dev_err(dev, "failed to assert reset: %d\n", err);
2770 return err;
2771 }
2772
2773 if (dc->soc->has_powergate)
2774 tegra_powergate_power_off(dc->powergate);
2775
2776 clk_disable_unprepare(dc->clk);
2777 pm_runtime_put_sync(dev);
2778
2779 return 0;
2780}
2781
2782static int tegra_dc_runtime_resume(struct host1x_client *client)
2783{
2784 struct tegra_dc *dc = host1x_client_to_dc(client);
2785 struct device *dev = client->dev;
2786 int err;
2787
2788 err = pm_runtime_resume_and_get(dev);
2789 if (err < 0) {
2790 dev_err(dev, "failed to get runtime PM: %d\n", err);
2791 return err;
2792 }
2793
2794 if (dc->soc->has_powergate) {
2795 err = tegra_powergate_sequence_power_up(dc->powergate, dc->clk,
2796 dc->rst);
2797 if (err < 0) {
2798 dev_err(dev, "failed to power partition: %d\n", err);
2799 goto put_rpm;
2800 }
2801 } else {
2802 err = clk_prepare_enable(dc->clk);
2803 if (err < 0) {
2804 dev_err(dev, "failed to enable clock: %d\n", err);
2805 goto put_rpm;
2806 }
2807
2808 err = reset_control_deassert(dc->rst);
2809 if (err < 0) {
2810 dev_err(dev, "failed to deassert reset: %d\n", err);
2811 goto disable_clk;
2812 }
2813 }
2814
2815 return 0;
2816
2817disable_clk:
2818 clk_disable_unprepare(dc->clk);
2819put_rpm:
2820 pm_runtime_put_sync(dev);
2821 return err;
2822}
2823
2824static const struct host1x_client_ops dc_client_ops = {
2825 .early_init = tegra_dc_early_init,
2826 .init = tegra_dc_init,
2827 .exit = tegra_dc_exit,
2828 .late_exit = tegra_dc_late_exit,
2829 .suspend = tegra_dc_runtime_suspend,
2830 .resume = tegra_dc_runtime_resume,
2831};
2832
2833static const struct tegra_dc_soc_info tegra20_dc_soc_info = {
2834 .supports_background_color = false,
2835 .supports_interlacing = false,
2836 .supports_cursor = false,
2837 .supports_block_linear = false,
2838 .supports_sector_layout = false,
2839 .has_legacy_blending = true,
2840 .pitch_align = 8,
2841 .has_powergate = false,
2842 .coupled_pm = true,
2843 .has_nvdisplay = false,
2844 .num_primary_formats = ARRAY_SIZE(tegra20_primary_formats),
2845 .primary_formats = tegra20_primary_formats,
2846 .num_overlay_formats = ARRAY_SIZE(tegra20_overlay_formats),
2847 .overlay_formats = tegra20_overlay_formats,
2848 .modifiers = tegra20_modifiers,
2849 .has_win_a_without_filters = true,
2850 .has_win_b_vfilter_mem_client = true,
2851 .has_win_c_without_vert_filter = true,
2852 .plane_tiled_memory_bandwidth_x2 = false,
2853 .has_pll_d2_out0 = false,
2854};
2855
2856static const struct tegra_dc_soc_info tegra30_dc_soc_info = {
2857 .supports_background_color = false,
2858 .supports_interlacing = false,
2859 .supports_cursor = false,
2860 .supports_block_linear = false,
2861 .supports_sector_layout = false,
2862 .has_legacy_blending = true,
2863 .pitch_align = 8,
2864 .has_powergate = false,
2865 .coupled_pm = false,
2866 .has_nvdisplay = false,
2867 .num_primary_formats = ARRAY_SIZE(tegra20_primary_formats),
2868 .primary_formats = tegra20_primary_formats,
2869 .num_overlay_formats = ARRAY_SIZE(tegra20_overlay_formats),
2870 .overlay_formats = tegra20_overlay_formats,
2871 .modifiers = tegra20_modifiers,
2872 .has_win_a_without_filters = false,
2873 .has_win_b_vfilter_mem_client = true,
2874 .has_win_c_without_vert_filter = false,
2875 .plane_tiled_memory_bandwidth_x2 = true,
2876 .has_pll_d2_out0 = true,
2877};
2878
2879static const struct tegra_dc_soc_info tegra114_dc_soc_info = {
2880 .supports_background_color = false,
2881 .supports_interlacing = false,
2882 .supports_cursor = false,
2883 .supports_block_linear = false,
2884 .supports_sector_layout = false,
2885 .has_legacy_blending = true,
2886 .pitch_align = 64,
2887 .has_powergate = true,
2888 .coupled_pm = false,
2889 .has_nvdisplay = false,
2890 .num_primary_formats = ARRAY_SIZE(tegra114_primary_formats),
2891 .primary_formats = tegra114_primary_formats,
2892 .num_overlay_formats = ARRAY_SIZE(tegra114_overlay_formats),
2893 .overlay_formats = tegra114_overlay_formats,
2894 .modifiers = tegra20_modifiers,
2895 .has_win_a_without_filters = false,
2896 .has_win_b_vfilter_mem_client = false,
2897 .has_win_c_without_vert_filter = false,
2898 .plane_tiled_memory_bandwidth_x2 = true,
2899 .has_pll_d2_out0 = true,
2900};
2901
2902static const struct tegra_dc_soc_info tegra124_dc_soc_info = {
2903 .supports_background_color = true,
2904 .supports_interlacing = true,
2905 .supports_cursor = true,
2906 .supports_block_linear = true,
2907 .supports_sector_layout = false,
2908 .has_legacy_blending = false,
2909 .pitch_align = 64,
2910 .has_powergate = true,
2911 .coupled_pm = false,
2912 .has_nvdisplay = false,
2913 .num_primary_formats = ARRAY_SIZE(tegra124_primary_formats),
2914 .primary_formats = tegra124_primary_formats,
2915 .num_overlay_formats = ARRAY_SIZE(tegra124_overlay_formats),
2916 .overlay_formats = tegra124_overlay_formats,
2917 .modifiers = tegra124_modifiers,
2918 .has_win_a_without_filters = false,
2919 .has_win_b_vfilter_mem_client = false,
2920 .has_win_c_without_vert_filter = false,
2921 .plane_tiled_memory_bandwidth_x2 = false,
2922 .has_pll_d2_out0 = true,
2923};
2924
2925static const struct tegra_dc_soc_info tegra210_dc_soc_info = {
2926 .supports_background_color = true,
2927 .supports_interlacing = true,
2928 .supports_cursor = true,
2929 .supports_block_linear = true,
2930 .supports_sector_layout = false,
2931 .has_legacy_blending = false,
2932 .pitch_align = 64,
2933 .has_powergate = true,
2934 .coupled_pm = false,
2935 .has_nvdisplay = false,
2936 .num_primary_formats = ARRAY_SIZE(tegra114_primary_formats),
2937 .primary_formats = tegra114_primary_formats,
2938 .num_overlay_formats = ARRAY_SIZE(tegra114_overlay_formats),
2939 .overlay_formats = tegra114_overlay_formats,
2940 .modifiers = tegra124_modifiers,
2941 .has_win_a_without_filters = false,
2942 .has_win_b_vfilter_mem_client = false,
2943 .has_win_c_without_vert_filter = false,
2944 .plane_tiled_memory_bandwidth_x2 = false,
2945 .has_pll_d2_out0 = true,
2946};
2947
2948static const struct tegra_windowgroup_soc tegra186_dc_wgrps[] = {
2949 {
2950 .index = 0,
2951 .dc = 0,
2952 .windows = (const unsigned int[]) { 0 },
2953 .num_windows = 1,
2954 }, {
2955 .index = 1,
2956 .dc = 1,
2957 .windows = (const unsigned int[]) { 1 },
2958 .num_windows = 1,
2959 }, {
2960 .index = 2,
2961 .dc = 1,
2962 .windows = (const unsigned int[]) { 2 },
2963 .num_windows = 1,
2964 }, {
2965 .index = 3,
2966 .dc = 2,
2967 .windows = (const unsigned int[]) { 3 },
2968 .num_windows = 1,
2969 }, {
2970 .index = 4,
2971 .dc = 2,
2972 .windows = (const unsigned int[]) { 4 },
2973 .num_windows = 1,
2974 }, {
2975 .index = 5,
2976 .dc = 2,
2977 .windows = (const unsigned int[]) { 5 },
2978 .num_windows = 1,
2979 },
2980};
2981
2982static const struct tegra_dc_soc_info tegra186_dc_soc_info = {
2983 .supports_background_color = true,
2984 .supports_interlacing = true,
2985 .supports_cursor = true,
2986 .supports_block_linear = true,
2987 .supports_sector_layout = false,
2988 .has_legacy_blending = false,
2989 .pitch_align = 64,
2990 .has_powergate = false,
2991 .coupled_pm = false,
2992 .has_nvdisplay = true,
2993 .wgrps = tegra186_dc_wgrps,
2994 .num_wgrps = ARRAY_SIZE(tegra186_dc_wgrps),
2995 .plane_tiled_memory_bandwidth_x2 = false,
2996 .has_pll_d2_out0 = false,
2997};
2998
2999static const struct tegra_windowgroup_soc tegra194_dc_wgrps[] = {
3000 {
3001 .index = 0,
3002 .dc = 0,
3003 .windows = (const unsigned int[]) { 0 },
3004 .num_windows = 1,
3005 }, {
3006 .index = 1,
3007 .dc = 1,
3008 .windows = (const unsigned int[]) { 1 },
3009 .num_windows = 1,
3010 }, {
3011 .index = 2,
3012 .dc = 1,
3013 .windows = (const unsigned int[]) { 2 },
3014 .num_windows = 1,
3015 }, {
3016 .index = 3,
3017 .dc = 2,
3018 .windows = (const unsigned int[]) { 3 },
3019 .num_windows = 1,
3020 }, {
3021 .index = 4,
3022 .dc = 2,
3023 .windows = (const unsigned int[]) { 4 },
3024 .num_windows = 1,
3025 }, {
3026 .index = 5,
3027 .dc = 2,
3028 .windows = (const unsigned int[]) { 5 },
3029 .num_windows = 1,
3030 },
3031};
3032
3033static const struct tegra_dc_soc_info tegra194_dc_soc_info = {
3034 .supports_background_color = true,
3035 .supports_interlacing = true,
3036 .supports_cursor = true,
3037 .supports_block_linear = true,
3038 .supports_sector_layout = true,
3039 .has_legacy_blending = false,
3040 .pitch_align = 64,
3041 .has_powergate = false,
3042 .coupled_pm = false,
3043 .has_nvdisplay = true,
3044 .wgrps = tegra194_dc_wgrps,
3045 .num_wgrps = ARRAY_SIZE(tegra194_dc_wgrps),
3046 .plane_tiled_memory_bandwidth_x2 = false,
3047 .has_pll_d2_out0 = false,
3048};
3049
3050static const struct of_device_id tegra_dc_of_match[] = {
3051 {
3052 .compatible = "nvidia,tegra194-dc",
3053 .data = &tegra194_dc_soc_info,
3054 }, {
3055 .compatible = "nvidia,tegra186-dc",
3056 .data = &tegra186_dc_soc_info,
3057 }, {
3058 .compatible = "nvidia,tegra210-dc",
3059 .data = &tegra210_dc_soc_info,
3060 }, {
3061 .compatible = "nvidia,tegra124-dc",
3062 .data = &tegra124_dc_soc_info,
3063 }, {
3064 .compatible = "nvidia,tegra114-dc",
3065 .data = &tegra114_dc_soc_info,
3066 }, {
3067 .compatible = "nvidia,tegra30-dc",
3068 .data = &tegra30_dc_soc_info,
3069 }, {
3070 .compatible = "nvidia,tegra20-dc",
3071 .data = &tegra20_dc_soc_info,
3072 }, {
3073 /* sentinel */
3074 }
3075};
3076MODULE_DEVICE_TABLE(of, tegra_dc_of_match);
3077
3078static int tegra_dc_parse_dt(struct tegra_dc *dc)
3079{
3080 struct device_node *np;
3081 u32 value = 0;
3082 int err;
3083
3084 err = of_property_read_u32(dc->dev->of_node, "nvidia,head", &value);
3085 if (err < 0) {
3086 dev_err(dc->dev, "missing \"nvidia,head\" property\n");
3087
3088 /*
3089 * If the nvidia,head property isn't present, try to find the
3090 * correct head number by looking up the position of this
3091 * display controller's node within the device tree. Assuming
3092 * that the nodes are ordered properly in the DTS file and
3093 * that the translation into a flattened device tree blob
3094 * preserves that ordering this will actually yield the right
3095 * head number.
3096 *
3097 * If those assumptions don't hold, this will still work for
3098 * cases where only a single display controller is used.
3099 */
3100 for_each_matching_node(np, tegra_dc_of_match) {
3101 if (np == dc->dev->of_node) {
3102 of_node_put(np);
3103 break;
3104 }
3105
3106 value++;
3107 }
3108 }
3109
3110 dc->pipe = value;
3111
3112 return 0;
3113}
3114
3115static int tegra_dc_match_by_pipe(struct device *dev, const void *data)
3116{
3117 struct tegra_dc *dc = dev_get_drvdata(dev);
3118 unsigned int pipe = (unsigned long)(void *)data;
3119
3120 return dc->pipe == pipe;
3121}
3122
3123static int tegra_dc_couple(struct tegra_dc *dc)
3124{
3125 /*
3126 * On Tegra20, DC1 requires DC0 to be taken out of reset in order to
3127 * be enabled, otherwise CPU hangs on writing to CMD_DISPLAY_COMMAND /
3128 * POWER_CONTROL registers during CRTC enabling.
3129 */
3130 if (dc->soc->coupled_pm && dc->pipe == 1) {
3131 struct device *companion;
3132 struct tegra_dc *parent;
3133
3134 companion = driver_find_device(dc->dev->driver, NULL, (const void *)0,
3135 tegra_dc_match_by_pipe);
3136 if (!companion)
3137 return -EPROBE_DEFER;
3138
3139 parent = dev_get_drvdata(companion);
3140 dc->client.parent = &parent->client;
3141
3142 dev_dbg(dc->dev, "coupled to %s\n", dev_name(companion));
3143 }
3144
3145 return 0;
3146}
3147
3148static int tegra_dc_init_opp_table(struct tegra_dc *dc)
3149{
3150 struct tegra_core_opp_params opp_params = {};
3151 int err;
3152
3153 err = devm_tegra_core_dev_init_opp_table(dc->dev, &opp_params);
3154 if (err && err != -ENODEV)
3155 return err;
3156
3157 if (err)
3158 dc->has_opp_table = false;
3159 else
3160 dc->has_opp_table = true;
3161
3162 return 0;
3163}
3164
3165static int tegra_dc_probe(struct platform_device *pdev)
3166{
3167 u64 dma_mask = dma_get_mask(pdev->dev.parent);
3168 struct tegra_dc *dc;
3169 int err;
3170
3171 err = dma_coerce_mask_and_coherent(&pdev->dev, dma_mask);
3172 if (err < 0) {
3173 dev_err(&pdev->dev, "failed to set DMA mask: %d\n", err);
3174 return err;
3175 }
3176
3177 dc = devm_kzalloc(&pdev->dev, sizeof(*dc), GFP_KERNEL);
3178 if (!dc)
3179 return -ENOMEM;
3180
3181 dc->soc = of_device_get_match_data(&pdev->dev);
3182
3183 INIT_LIST_HEAD(&dc->list);
3184 dc->dev = &pdev->dev;
3185
3186 err = tegra_dc_parse_dt(dc);
3187 if (err < 0)
3188 return err;
3189
3190 err = tegra_dc_couple(dc);
3191 if (err < 0)
3192 return err;
3193
3194 dc->clk = devm_clk_get(&pdev->dev, NULL);
3195 if (IS_ERR(dc->clk)) {
3196 dev_err(&pdev->dev, "failed to get clock\n");
3197 return PTR_ERR(dc->clk);
3198 }
3199
3200 dc->rst = devm_reset_control_get(&pdev->dev, "dc");
3201 if (IS_ERR(dc->rst)) {
3202 dev_err(&pdev->dev, "failed to get reset\n");
3203 return PTR_ERR(dc->rst);
3204 }
3205
3206 /* assert reset and disable clock */
3207 err = clk_prepare_enable(dc->clk);
3208 if (err < 0)
3209 return err;
3210
3211 usleep_range(2000, 4000);
3212
3213 err = reset_control_assert(dc->rst);
3214 if (err < 0) {
3215 clk_disable_unprepare(dc->clk);
3216 return err;
3217 }
3218
3219 usleep_range(2000, 4000);
3220
3221 clk_disable_unprepare(dc->clk);
3222
3223 if (dc->soc->has_powergate) {
3224 if (dc->pipe == 0)
3225 dc->powergate = TEGRA_POWERGATE_DIS;
3226 else
3227 dc->powergate = TEGRA_POWERGATE_DISB;
3228
3229 tegra_powergate_power_off(dc->powergate);
3230 }
3231
3232 err = tegra_dc_init_opp_table(dc);
3233 if (err < 0)
3234 return err;
3235
3236 dc->regs = devm_platform_ioremap_resource(pdev, 0);
3237 if (IS_ERR(dc->regs))
3238 return PTR_ERR(dc->regs);
3239
3240 dc->irq = platform_get_irq(pdev, 0);
3241 if (dc->irq < 0)
3242 return -ENXIO;
3243
3244 err = tegra_dc_rgb_probe(dc);
3245 if (err < 0 && err != -ENODEV)
3246 return dev_err_probe(&pdev->dev, err,
3247 "failed to probe RGB output\n");
3248
3249 platform_set_drvdata(pdev, dc);
3250 pm_runtime_enable(&pdev->dev);
3251
3252 INIT_LIST_HEAD(&dc->client.list);
3253 dc->client.ops = &dc_client_ops;
3254 dc->client.dev = &pdev->dev;
3255
3256 err = host1x_client_register(&dc->client);
3257 if (err < 0) {
3258 dev_err(&pdev->dev, "failed to register host1x client: %d\n",
3259 err);
3260 goto disable_pm;
3261 }
3262
3263 return 0;
3264
3265disable_pm:
3266 pm_runtime_disable(&pdev->dev);
3267 tegra_dc_rgb_remove(dc);
3268
3269 return err;
3270}
3271
3272static void tegra_dc_remove(struct platform_device *pdev)
3273{
3274 struct tegra_dc *dc = platform_get_drvdata(pdev);
3275
3276 host1x_client_unregister(&dc->client);
3277
3278 tegra_dc_rgb_remove(dc);
3279
3280 pm_runtime_disable(&pdev->dev);
3281}
3282
3283struct platform_driver tegra_dc_driver = {
3284 .driver = {
3285 .name = "tegra-dc",
3286 .of_match_table = tegra_dc_of_match,
3287 },
3288 .probe = tegra_dc_probe,
3289 .remove = tegra_dc_remove,
3290};
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2012 Avionic Design GmbH
4 * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
5 */
6
7#include <linux/clk.h>
8#include <linux/debugfs.h>
9#include <linux/delay.h>
10#include <linux/iommu.h>
11#include <linux/module.h>
12#include <linux/of_device.h>
13#include <linux/pm_runtime.h>
14#include <linux/reset.h>
15
16#include <soc/tegra/pmc.h>
17
18#include <drm/drm_atomic.h>
19#include <drm/drm_atomic_helper.h>
20#include <drm/drm_debugfs.h>
21#include <drm/drm_fourcc.h>
22#include <drm/drm_plane_helper.h>
23#include <drm/drm_vblank.h>
24
25#include "dc.h"
26#include "drm.h"
27#include "gem.h"
28#include "hub.h"
29#include "plane.h"
30
31static void tegra_crtc_atomic_destroy_state(struct drm_crtc *crtc,
32 struct drm_crtc_state *state);
33
34static void tegra_dc_stats_reset(struct tegra_dc_stats *stats)
35{
36 stats->frames = 0;
37 stats->vblank = 0;
38 stats->underflow = 0;
39 stats->overflow = 0;
40}
41
42/* Reads the active copy of a register. */
43static u32 tegra_dc_readl_active(struct tegra_dc *dc, unsigned long offset)
44{
45 u32 value;
46
47 tegra_dc_writel(dc, READ_MUX, DC_CMD_STATE_ACCESS);
48 value = tegra_dc_readl(dc, offset);
49 tegra_dc_writel(dc, 0, DC_CMD_STATE_ACCESS);
50
51 return value;
52}
53
54static inline unsigned int tegra_plane_offset(struct tegra_plane *plane,
55 unsigned int offset)
56{
57 if (offset >= 0x500 && offset <= 0x638) {
58 offset = 0x000 + (offset - 0x500);
59 return plane->offset + offset;
60 }
61
62 if (offset >= 0x700 && offset <= 0x719) {
63 offset = 0x180 + (offset - 0x700);
64 return plane->offset + offset;
65 }
66
67 if (offset >= 0x800 && offset <= 0x839) {
68 offset = 0x1c0 + (offset - 0x800);
69 return plane->offset + offset;
70 }
71
72 dev_WARN(plane->dc->dev, "invalid offset: %x\n", offset);
73
74 return plane->offset + offset;
75}
76
77static inline u32 tegra_plane_readl(struct tegra_plane *plane,
78 unsigned int offset)
79{
80 return tegra_dc_readl(plane->dc, tegra_plane_offset(plane, offset));
81}
82
83static inline void tegra_plane_writel(struct tegra_plane *plane, u32 value,
84 unsigned int offset)
85{
86 tegra_dc_writel(plane->dc, value, tegra_plane_offset(plane, offset));
87}
88
89bool tegra_dc_has_output(struct tegra_dc *dc, struct device *dev)
90{
91 struct device_node *np = dc->dev->of_node;
92 struct of_phandle_iterator it;
93 int err;
94
95 of_for_each_phandle(&it, err, np, "nvidia,outputs", NULL, 0)
96 if (it.node == dev->of_node)
97 return true;
98
99 return false;
100}
101
102/*
103 * Double-buffered registers have two copies: ASSEMBLY and ACTIVE. When the
104 * *_ACT_REQ bits are set the ASSEMBLY copy is latched into the ACTIVE copy.
105 * Latching happens mmediately if the display controller is in STOP mode or
106 * on the next frame boundary otherwise.
107 *
108 * Triple-buffered registers have three copies: ASSEMBLY, ARM and ACTIVE. The
109 * ASSEMBLY copy is latched into the ARM copy immediately after *_UPDATE bits
110 * are written. When the *_ACT_REQ bits are written, the ARM copy is latched
111 * into the ACTIVE copy, either immediately if the display controller is in
112 * STOP mode, or at the next frame boundary otherwise.
113 */
114void tegra_dc_commit(struct tegra_dc *dc)
115{
116 tegra_dc_writel(dc, GENERAL_ACT_REQ << 8, DC_CMD_STATE_CONTROL);
117 tegra_dc_writel(dc, GENERAL_ACT_REQ, DC_CMD_STATE_CONTROL);
118}
119
120static inline u32 compute_dda_inc(unsigned int in, unsigned int out, bool v,
121 unsigned int bpp)
122{
123 fixed20_12 outf = dfixed_init(out);
124 fixed20_12 inf = dfixed_init(in);
125 u32 dda_inc;
126 int max;
127
128 if (v)
129 max = 15;
130 else {
131 switch (bpp) {
132 case 2:
133 max = 8;
134 break;
135
136 default:
137 WARN_ON_ONCE(1);
138 fallthrough;
139 case 4:
140 max = 4;
141 break;
142 }
143 }
144
145 outf.full = max_t(u32, outf.full - dfixed_const(1), dfixed_const(1));
146 inf.full -= dfixed_const(1);
147
148 dda_inc = dfixed_div(inf, outf);
149 dda_inc = min_t(u32, dda_inc, dfixed_const(max));
150
151 return dda_inc;
152}
153
154static inline u32 compute_initial_dda(unsigned int in)
155{
156 fixed20_12 inf = dfixed_init(in);
157 return dfixed_frac(inf);
158}
159
160static void tegra_plane_setup_blending_legacy(struct tegra_plane *plane)
161{
162 u32 background[3] = {
163 BLEND_WEIGHT1(0) | BLEND_WEIGHT0(0) | BLEND_COLOR_KEY_NONE,
164 BLEND_WEIGHT1(0) | BLEND_WEIGHT0(0) | BLEND_COLOR_KEY_NONE,
165 BLEND_WEIGHT1(0) | BLEND_WEIGHT0(0) | BLEND_COLOR_KEY_NONE,
166 };
167 u32 foreground = BLEND_WEIGHT1(255) | BLEND_WEIGHT0(255) |
168 BLEND_COLOR_KEY_NONE;
169 u32 blendnokey = BLEND_WEIGHT1(255) | BLEND_WEIGHT0(255);
170 struct tegra_plane_state *state;
171 u32 blending[2];
172 unsigned int i;
173
174 /* disable blending for non-overlapping case */
175 tegra_plane_writel(plane, blendnokey, DC_WIN_BLEND_NOKEY);
176 tegra_plane_writel(plane, foreground, DC_WIN_BLEND_1WIN);
177
178 state = to_tegra_plane_state(plane->base.state);
179
180 if (state->opaque) {
181 /*
182 * Since custom fix-weight blending isn't utilized and weight
183 * of top window is set to max, we can enforce dependent
184 * blending which in this case results in transparent bottom
185 * window if top window is opaque and if top window enables
186 * alpha blending, then bottom window is getting alpha value
187 * of 1 minus the sum of alpha components of the overlapping
188 * plane.
189 */
190 background[0] |= BLEND_CONTROL_DEPENDENT;
191 background[1] |= BLEND_CONTROL_DEPENDENT;
192
193 /*
194 * The region where three windows overlap is the intersection
195 * of the two regions where two windows overlap. It contributes
196 * to the area if all of the windows on top of it have an alpha
197 * component.
198 */
199 switch (state->base.normalized_zpos) {
200 case 0:
201 if (state->blending[0].alpha &&
202 state->blending[1].alpha)
203 background[2] |= BLEND_CONTROL_DEPENDENT;
204 break;
205
206 case 1:
207 background[2] |= BLEND_CONTROL_DEPENDENT;
208 break;
209 }
210 } else {
211 /*
212 * Enable alpha blending if pixel format has an alpha
213 * component.
214 */
215 foreground |= BLEND_CONTROL_ALPHA;
216
217 /*
218 * If any of the windows on top of this window is opaque, it
219 * will completely conceal this window within that area. If
220 * top window has an alpha component, it is blended over the
221 * bottom window.
222 */
223 for (i = 0; i < 2; i++) {
224 if (state->blending[i].alpha &&
225 state->blending[i].top)
226 background[i] |= BLEND_CONTROL_DEPENDENT;
227 }
228
229 switch (state->base.normalized_zpos) {
230 case 0:
231 if (state->blending[0].alpha &&
232 state->blending[1].alpha)
233 background[2] |= BLEND_CONTROL_DEPENDENT;
234 break;
235
236 case 1:
237 /*
238 * When both middle and topmost windows have an alpha,
239 * these windows a mixed together and then the result
240 * is blended over the bottom window.
241 */
242 if (state->blending[0].alpha &&
243 state->blending[0].top)
244 background[2] |= BLEND_CONTROL_ALPHA;
245
246 if (state->blending[1].alpha &&
247 state->blending[1].top)
248 background[2] |= BLEND_CONTROL_ALPHA;
249 break;
250 }
251 }
252
253 switch (state->base.normalized_zpos) {
254 case 0:
255 tegra_plane_writel(plane, background[0], DC_WIN_BLEND_2WIN_X);
256 tegra_plane_writel(plane, background[1], DC_WIN_BLEND_2WIN_Y);
257 tegra_plane_writel(plane, background[2], DC_WIN_BLEND_3WIN_XY);
258 break;
259
260 case 1:
261 /*
262 * If window B / C is topmost, then X / Y registers are
263 * matching the order of blending[...] state indices,
264 * otherwise a swap is required.
265 */
266 if (!state->blending[0].top && state->blending[1].top) {
267 blending[0] = foreground;
268 blending[1] = background[1];
269 } else {
270 blending[0] = background[0];
271 blending[1] = foreground;
272 }
273
274 tegra_plane_writel(plane, blending[0], DC_WIN_BLEND_2WIN_X);
275 tegra_plane_writel(plane, blending[1], DC_WIN_BLEND_2WIN_Y);
276 tegra_plane_writel(plane, background[2], DC_WIN_BLEND_3WIN_XY);
277 break;
278
279 case 2:
280 tegra_plane_writel(plane, foreground, DC_WIN_BLEND_2WIN_X);
281 tegra_plane_writel(plane, foreground, DC_WIN_BLEND_2WIN_Y);
282 tegra_plane_writel(plane, foreground, DC_WIN_BLEND_3WIN_XY);
283 break;
284 }
285}
286
287static void tegra_plane_setup_blending(struct tegra_plane *plane,
288 const struct tegra_dc_window *window)
289{
290 u32 value;
291
292 value = BLEND_FACTOR_DST_ALPHA_ZERO | BLEND_FACTOR_SRC_ALPHA_K2 |
293 BLEND_FACTOR_DST_COLOR_NEG_K1_TIMES_SRC |
294 BLEND_FACTOR_SRC_COLOR_K1_TIMES_SRC;
295 tegra_plane_writel(plane, value, DC_WIN_BLEND_MATCH_SELECT);
296
297 value = BLEND_FACTOR_DST_ALPHA_ZERO | BLEND_FACTOR_SRC_ALPHA_K2 |
298 BLEND_FACTOR_DST_COLOR_NEG_K1_TIMES_SRC |
299 BLEND_FACTOR_SRC_COLOR_K1_TIMES_SRC;
300 tegra_plane_writel(plane, value, DC_WIN_BLEND_NOMATCH_SELECT);
301
302 value = K2(255) | K1(255) | WINDOW_LAYER_DEPTH(255 - window->zpos);
303 tegra_plane_writel(plane, value, DC_WIN_BLEND_LAYER_CONTROL);
304}
305
306static bool
307tegra_plane_use_horizontal_filtering(struct tegra_plane *plane,
308 const struct tegra_dc_window *window)
309{
310 struct tegra_dc *dc = plane->dc;
311
312 if (window->src.w == window->dst.w)
313 return false;
314
315 if (plane->index == 0 && dc->soc->has_win_a_without_filters)
316 return false;
317
318 return true;
319}
320
321static bool
322tegra_plane_use_vertical_filtering(struct tegra_plane *plane,
323 const struct tegra_dc_window *window)
324{
325 struct tegra_dc *dc = plane->dc;
326
327 if (window->src.h == window->dst.h)
328 return false;
329
330 if (plane->index == 0 && dc->soc->has_win_a_without_filters)
331 return false;
332
333 if (plane->index == 2 && dc->soc->has_win_c_without_vert_filter)
334 return false;
335
336 return true;
337}
338
339static void tegra_dc_setup_window(struct tegra_plane *plane,
340 const struct tegra_dc_window *window)
341{
342 unsigned h_offset, v_offset, h_size, v_size, h_dda, v_dda, bpp;
343 struct tegra_dc *dc = plane->dc;
344 bool yuv, planar;
345 u32 value;
346
347 /*
348 * For YUV planar modes, the number of bytes per pixel takes into
349 * account only the luma component and therefore is 1.
350 */
351 yuv = tegra_plane_format_is_yuv(window->format, &planar);
352 if (!yuv)
353 bpp = window->bits_per_pixel / 8;
354 else
355 bpp = planar ? 1 : 2;
356
357 tegra_plane_writel(plane, window->format, DC_WIN_COLOR_DEPTH);
358 tegra_plane_writel(plane, window->swap, DC_WIN_BYTE_SWAP);
359
360 value = V_POSITION(window->dst.y) | H_POSITION(window->dst.x);
361 tegra_plane_writel(plane, value, DC_WIN_POSITION);
362
363 value = V_SIZE(window->dst.h) | H_SIZE(window->dst.w);
364 tegra_plane_writel(plane, value, DC_WIN_SIZE);
365
366 h_offset = window->src.x * bpp;
367 v_offset = window->src.y;
368 h_size = window->src.w * bpp;
369 v_size = window->src.h;
370
371 if (window->reflect_x)
372 h_offset += (window->src.w - 1) * bpp;
373
374 if (window->reflect_y)
375 v_offset += window->src.h - 1;
376
377 value = V_PRESCALED_SIZE(v_size) | H_PRESCALED_SIZE(h_size);
378 tegra_plane_writel(plane, value, DC_WIN_PRESCALED_SIZE);
379
380 /*
381 * For DDA computations the number of bytes per pixel for YUV planar
382 * modes needs to take into account all Y, U and V components.
383 */
384 if (yuv && planar)
385 bpp = 2;
386
387 h_dda = compute_dda_inc(window->src.w, window->dst.w, false, bpp);
388 v_dda = compute_dda_inc(window->src.h, window->dst.h, true, bpp);
389
390 value = V_DDA_INC(v_dda) | H_DDA_INC(h_dda);
391 tegra_plane_writel(plane, value, DC_WIN_DDA_INC);
392
393 h_dda = compute_initial_dda(window->src.x);
394 v_dda = compute_initial_dda(window->src.y);
395
396 tegra_plane_writel(plane, h_dda, DC_WIN_H_INITIAL_DDA);
397 tegra_plane_writel(plane, v_dda, DC_WIN_V_INITIAL_DDA);
398
399 tegra_plane_writel(plane, 0, DC_WIN_UV_BUF_STRIDE);
400 tegra_plane_writel(plane, 0, DC_WIN_BUF_STRIDE);
401
402 tegra_plane_writel(plane, window->base[0], DC_WINBUF_START_ADDR);
403
404 if (yuv && planar) {
405 tegra_plane_writel(plane, window->base[1], DC_WINBUF_START_ADDR_U);
406 tegra_plane_writel(plane, window->base[2], DC_WINBUF_START_ADDR_V);
407 value = window->stride[1] << 16 | window->stride[0];
408 tegra_plane_writel(plane, value, DC_WIN_LINE_STRIDE);
409 } else {
410 tegra_plane_writel(plane, window->stride[0], DC_WIN_LINE_STRIDE);
411 }
412
413 tegra_plane_writel(plane, h_offset, DC_WINBUF_ADDR_H_OFFSET);
414 tegra_plane_writel(plane, v_offset, DC_WINBUF_ADDR_V_OFFSET);
415
416 if (dc->soc->supports_block_linear) {
417 unsigned long height = window->tiling.value;
418
419 switch (window->tiling.mode) {
420 case TEGRA_BO_TILING_MODE_PITCH:
421 value = DC_WINBUF_SURFACE_KIND_PITCH;
422 break;
423
424 case TEGRA_BO_TILING_MODE_TILED:
425 value = DC_WINBUF_SURFACE_KIND_TILED;
426 break;
427
428 case TEGRA_BO_TILING_MODE_BLOCK:
429 value = DC_WINBUF_SURFACE_KIND_BLOCK_HEIGHT(height) |
430 DC_WINBUF_SURFACE_KIND_BLOCK;
431 break;
432 }
433
434 tegra_plane_writel(plane, value, DC_WINBUF_SURFACE_KIND);
435 } else {
436 switch (window->tiling.mode) {
437 case TEGRA_BO_TILING_MODE_PITCH:
438 value = DC_WIN_BUFFER_ADDR_MODE_LINEAR_UV |
439 DC_WIN_BUFFER_ADDR_MODE_LINEAR;
440 break;
441
442 case TEGRA_BO_TILING_MODE_TILED:
443 value = DC_WIN_BUFFER_ADDR_MODE_TILE_UV |
444 DC_WIN_BUFFER_ADDR_MODE_TILE;
445 break;
446
447 case TEGRA_BO_TILING_MODE_BLOCK:
448 /*
449 * No need to handle this here because ->atomic_check
450 * will already have filtered it out.
451 */
452 break;
453 }
454
455 tegra_plane_writel(plane, value, DC_WIN_BUFFER_ADDR_MODE);
456 }
457
458 value = WIN_ENABLE;
459
460 if (yuv) {
461 /* setup default colorspace conversion coefficients */
462 tegra_plane_writel(plane, 0x00f0, DC_WIN_CSC_YOF);
463 tegra_plane_writel(plane, 0x012a, DC_WIN_CSC_KYRGB);
464 tegra_plane_writel(plane, 0x0000, DC_WIN_CSC_KUR);
465 tegra_plane_writel(plane, 0x0198, DC_WIN_CSC_KVR);
466 tegra_plane_writel(plane, 0x039b, DC_WIN_CSC_KUG);
467 tegra_plane_writel(plane, 0x032f, DC_WIN_CSC_KVG);
468 tegra_plane_writel(plane, 0x0204, DC_WIN_CSC_KUB);
469 tegra_plane_writel(plane, 0x0000, DC_WIN_CSC_KVB);
470
471 value |= CSC_ENABLE;
472 } else if (window->bits_per_pixel < 24) {
473 value |= COLOR_EXPAND;
474 }
475
476 if (window->reflect_x)
477 value |= H_DIRECTION;
478
479 if (window->reflect_y)
480 value |= V_DIRECTION;
481
482 if (tegra_plane_use_horizontal_filtering(plane, window)) {
483 /*
484 * Enable horizontal 6-tap filter and set filtering
485 * coefficients to the default values defined in TRM.
486 */
487 tegra_plane_writel(plane, 0x00008000, DC_WIN_H_FILTER_P(0));
488 tegra_plane_writel(plane, 0x3e087ce1, DC_WIN_H_FILTER_P(1));
489 tegra_plane_writel(plane, 0x3b117ac1, DC_WIN_H_FILTER_P(2));
490 tegra_plane_writel(plane, 0x591b73aa, DC_WIN_H_FILTER_P(3));
491 tegra_plane_writel(plane, 0x57256d9a, DC_WIN_H_FILTER_P(4));
492 tegra_plane_writel(plane, 0x552f668b, DC_WIN_H_FILTER_P(5));
493 tegra_plane_writel(plane, 0x73385e8b, DC_WIN_H_FILTER_P(6));
494 tegra_plane_writel(plane, 0x72435583, DC_WIN_H_FILTER_P(7));
495 tegra_plane_writel(plane, 0x714c4c8b, DC_WIN_H_FILTER_P(8));
496 tegra_plane_writel(plane, 0x70554393, DC_WIN_H_FILTER_P(9));
497 tegra_plane_writel(plane, 0x715e389b, DC_WIN_H_FILTER_P(10));
498 tegra_plane_writel(plane, 0x71662faa, DC_WIN_H_FILTER_P(11));
499 tegra_plane_writel(plane, 0x536d25ba, DC_WIN_H_FILTER_P(12));
500 tegra_plane_writel(plane, 0x55731bca, DC_WIN_H_FILTER_P(13));
501 tegra_plane_writel(plane, 0x387a11d9, DC_WIN_H_FILTER_P(14));
502 tegra_plane_writel(plane, 0x3c7c08f1, DC_WIN_H_FILTER_P(15));
503
504 value |= H_FILTER;
505 }
506
507 if (tegra_plane_use_vertical_filtering(plane, window)) {
508 unsigned int i, k;
509
510 /*
511 * Enable vertical 2-tap filter and set filtering
512 * coefficients to the default values defined in TRM.
513 */
514 for (i = 0, k = 128; i < 16; i++, k -= 8)
515 tegra_plane_writel(plane, k, DC_WIN_V_FILTER_P(i));
516
517 value |= V_FILTER;
518 }
519
520 tegra_plane_writel(plane, value, DC_WIN_WIN_OPTIONS);
521
522 if (dc->soc->has_legacy_blending)
523 tegra_plane_setup_blending_legacy(plane);
524 else
525 tegra_plane_setup_blending(plane, window);
526}
527
528static const u32 tegra20_primary_formats[] = {
529 DRM_FORMAT_ARGB4444,
530 DRM_FORMAT_ARGB1555,
531 DRM_FORMAT_RGB565,
532 DRM_FORMAT_RGBA5551,
533 DRM_FORMAT_ABGR8888,
534 DRM_FORMAT_ARGB8888,
535 /* non-native formats */
536 DRM_FORMAT_XRGB1555,
537 DRM_FORMAT_RGBX5551,
538 DRM_FORMAT_XBGR8888,
539 DRM_FORMAT_XRGB8888,
540};
541
542static const u64 tegra20_modifiers[] = {
543 DRM_FORMAT_MOD_LINEAR,
544 DRM_FORMAT_MOD_NVIDIA_TEGRA_TILED,
545 DRM_FORMAT_MOD_INVALID
546};
547
548static const u32 tegra114_primary_formats[] = {
549 DRM_FORMAT_ARGB4444,
550 DRM_FORMAT_ARGB1555,
551 DRM_FORMAT_RGB565,
552 DRM_FORMAT_RGBA5551,
553 DRM_FORMAT_ABGR8888,
554 DRM_FORMAT_ARGB8888,
555 /* new on Tegra114 */
556 DRM_FORMAT_ABGR4444,
557 DRM_FORMAT_ABGR1555,
558 DRM_FORMAT_BGRA5551,
559 DRM_FORMAT_XRGB1555,
560 DRM_FORMAT_RGBX5551,
561 DRM_FORMAT_XBGR1555,
562 DRM_FORMAT_BGRX5551,
563 DRM_FORMAT_BGR565,
564 DRM_FORMAT_BGRA8888,
565 DRM_FORMAT_RGBA8888,
566 DRM_FORMAT_XRGB8888,
567 DRM_FORMAT_XBGR8888,
568};
569
570static const u32 tegra124_primary_formats[] = {
571 DRM_FORMAT_ARGB4444,
572 DRM_FORMAT_ARGB1555,
573 DRM_FORMAT_RGB565,
574 DRM_FORMAT_RGBA5551,
575 DRM_FORMAT_ABGR8888,
576 DRM_FORMAT_ARGB8888,
577 /* new on Tegra114 */
578 DRM_FORMAT_ABGR4444,
579 DRM_FORMAT_ABGR1555,
580 DRM_FORMAT_BGRA5551,
581 DRM_FORMAT_XRGB1555,
582 DRM_FORMAT_RGBX5551,
583 DRM_FORMAT_XBGR1555,
584 DRM_FORMAT_BGRX5551,
585 DRM_FORMAT_BGR565,
586 DRM_FORMAT_BGRA8888,
587 DRM_FORMAT_RGBA8888,
588 DRM_FORMAT_XRGB8888,
589 DRM_FORMAT_XBGR8888,
590 /* new on Tegra124 */
591 DRM_FORMAT_RGBX8888,
592 DRM_FORMAT_BGRX8888,
593};
594
595static const u64 tegra124_modifiers[] = {
596 DRM_FORMAT_MOD_LINEAR,
597 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0),
598 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1),
599 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2),
600 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(3),
601 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(4),
602 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(5),
603 DRM_FORMAT_MOD_INVALID
604};
605
606static int tegra_plane_atomic_check(struct drm_plane *plane,
607 struct drm_plane_state *state)
608{
609 struct tegra_plane_state *plane_state = to_tegra_plane_state(state);
610 unsigned int supported_rotation = DRM_MODE_ROTATE_0 |
611 DRM_MODE_REFLECT_X |
612 DRM_MODE_REFLECT_Y;
613 unsigned int rotation = state->rotation;
614 struct tegra_bo_tiling *tiling = &plane_state->tiling;
615 struct tegra_plane *tegra = to_tegra_plane(plane);
616 struct tegra_dc *dc = to_tegra_dc(state->crtc);
617 int err;
618
619 /* no need for further checks if the plane is being disabled */
620 if (!state->crtc)
621 return 0;
622
623 err = tegra_plane_format(state->fb->format->format,
624 &plane_state->format,
625 &plane_state->swap);
626 if (err < 0)
627 return err;
628
629 /*
630 * Tegra20 and Tegra30 are special cases here because they support
631 * only variants of specific formats with an alpha component, but not
632 * the corresponding opaque formats. However, the opaque formats can
633 * be emulated by disabling alpha blending for the plane.
634 */
635 if (dc->soc->has_legacy_blending) {
636 err = tegra_plane_setup_legacy_state(tegra, plane_state);
637 if (err < 0)
638 return err;
639 }
640
641 err = tegra_fb_get_tiling(state->fb, tiling);
642 if (err < 0)
643 return err;
644
645 if (tiling->mode == TEGRA_BO_TILING_MODE_BLOCK &&
646 !dc->soc->supports_block_linear) {
647 DRM_ERROR("hardware doesn't support block linear mode\n");
648 return -EINVAL;
649 }
650
651 /*
652 * Older userspace used custom BO flag in order to specify the Y
653 * reflection, while modern userspace uses the generic DRM rotation
654 * property in order to achieve the same result. The legacy BO flag
655 * duplicates the DRM rotation property when both are set.
656 */
657 if (tegra_fb_is_bottom_up(state->fb))
658 rotation |= DRM_MODE_REFLECT_Y;
659
660 rotation = drm_rotation_simplify(rotation, supported_rotation);
661
662 if (rotation & DRM_MODE_REFLECT_X)
663 plane_state->reflect_x = true;
664 else
665 plane_state->reflect_x = false;
666
667 if (rotation & DRM_MODE_REFLECT_Y)
668 plane_state->reflect_y = true;
669 else
670 plane_state->reflect_y = false;
671
672 /*
673 * Tegra doesn't support different strides for U and V planes so we
674 * error out if the user tries to display a framebuffer with such a
675 * configuration.
676 */
677 if (state->fb->format->num_planes > 2) {
678 if (state->fb->pitches[2] != state->fb->pitches[1]) {
679 DRM_ERROR("unsupported UV-plane configuration\n");
680 return -EINVAL;
681 }
682 }
683
684 err = tegra_plane_state_add(tegra, state);
685 if (err < 0)
686 return err;
687
688 return 0;
689}
690
691static void tegra_plane_atomic_disable(struct drm_plane *plane,
692 struct drm_plane_state *old_state)
693{
694 struct tegra_plane *p = to_tegra_plane(plane);
695 u32 value;
696
697 /* rien ne va plus */
698 if (!old_state || !old_state->crtc)
699 return;
700
701 value = tegra_plane_readl(p, DC_WIN_WIN_OPTIONS);
702 value &= ~WIN_ENABLE;
703 tegra_plane_writel(p, value, DC_WIN_WIN_OPTIONS);
704}
705
706static void tegra_plane_atomic_update(struct drm_plane *plane,
707 struct drm_plane_state *old_state)
708{
709 struct tegra_plane_state *state = to_tegra_plane_state(plane->state);
710 struct drm_framebuffer *fb = plane->state->fb;
711 struct tegra_plane *p = to_tegra_plane(plane);
712 struct tegra_dc_window window;
713 unsigned int i;
714
715 /* rien ne va plus */
716 if (!plane->state->crtc || !plane->state->fb)
717 return;
718
719 if (!plane->state->visible)
720 return tegra_plane_atomic_disable(plane, old_state);
721
722 memset(&window, 0, sizeof(window));
723 window.src.x = plane->state->src.x1 >> 16;
724 window.src.y = plane->state->src.y1 >> 16;
725 window.src.w = drm_rect_width(&plane->state->src) >> 16;
726 window.src.h = drm_rect_height(&plane->state->src) >> 16;
727 window.dst.x = plane->state->dst.x1;
728 window.dst.y = plane->state->dst.y1;
729 window.dst.w = drm_rect_width(&plane->state->dst);
730 window.dst.h = drm_rect_height(&plane->state->dst);
731 window.bits_per_pixel = fb->format->cpp[0] * 8;
732 window.reflect_x = state->reflect_x;
733 window.reflect_y = state->reflect_y;
734
735 /* copy from state */
736 window.zpos = plane->state->normalized_zpos;
737 window.tiling = state->tiling;
738 window.format = state->format;
739 window.swap = state->swap;
740
741 for (i = 0; i < fb->format->num_planes; i++) {
742 window.base[i] = state->iova[i] + fb->offsets[i];
743
744 /*
745 * Tegra uses a shared stride for UV planes. Framebuffers are
746 * already checked for this in the tegra_plane_atomic_check()
747 * function, so it's safe to ignore the V-plane pitch here.
748 */
749 if (i < 2)
750 window.stride[i] = fb->pitches[i];
751 }
752
753 tegra_dc_setup_window(p, &window);
754}
755
756static const struct drm_plane_helper_funcs tegra_plane_helper_funcs = {
757 .prepare_fb = tegra_plane_prepare_fb,
758 .cleanup_fb = tegra_plane_cleanup_fb,
759 .atomic_check = tegra_plane_atomic_check,
760 .atomic_disable = tegra_plane_atomic_disable,
761 .atomic_update = tegra_plane_atomic_update,
762};
763
764static unsigned long tegra_plane_get_possible_crtcs(struct drm_device *drm)
765{
766 /*
767 * Ideally this would use drm_crtc_mask(), but that would require the
768 * CRTC to already be in the mode_config's list of CRTCs. However, it
769 * will only be added to that list in the drm_crtc_init_with_planes()
770 * (in tegra_dc_init()), which in turn requires registration of these
771 * planes. So we have ourselves a nice little chicken and egg problem
772 * here.
773 *
774 * We work around this by manually creating the mask from the number
775 * of CRTCs that have been registered, and should therefore always be
776 * the same as drm_crtc_index() after registration.
777 */
778 return 1 << drm->mode_config.num_crtc;
779}
780
781static struct drm_plane *tegra_primary_plane_create(struct drm_device *drm,
782 struct tegra_dc *dc)
783{
784 unsigned long possible_crtcs = tegra_plane_get_possible_crtcs(drm);
785 enum drm_plane_type type = DRM_PLANE_TYPE_PRIMARY;
786 struct tegra_plane *plane;
787 unsigned int num_formats;
788 const u64 *modifiers;
789 const u32 *formats;
790 int err;
791
792 plane = kzalloc(sizeof(*plane), GFP_KERNEL);
793 if (!plane)
794 return ERR_PTR(-ENOMEM);
795
796 /* Always use window A as primary window */
797 plane->offset = 0xa00;
798 plane->index = 0;
799 plane->dc = dc;
800
801 num_formats = dc->soc->num_primary_formats;
802 formats = dc->soc->primary_formats;
803 modifiers = dc->soc->modifiers;
804
805 err = drm_universal_plane_init(drm, &plane->base, possible_crtcs,
806 &tegra_plane_funcs, formats,
807 num_formats, modifiers, type, NULL);
808 if (err < 0) {
809 kfree(plane);
810 return ERR_PTR(err);
811 }
812
813 drm_plane_helper_add(&plane->base, &tegra_plane_helper_funcs);
814 drm_plane_create_zpos_property(&plane->base, plane->index, 0, 255);
815
816 err = drm_plane_create_rotation_property(&plane->base,
817 DRM_MODE_ROTATE_0,
818 DRM_MODE_ROTATE_0 |
819 DRM_MODE_ROTATE_180 |
820 DRM_MODE_REFLECT_X |
821 DRM_MODE_REFLECT_Y);
822 if (err < 0)
823 dev_err(dc->dev, "failed to create rotation property: %d\n",
824 err);
825
826 return &plane->base;
827}
828
829static const u32 tegra_cursor_plane_formats[] = {
830 DRM_FORMAT_RGBA8888,
831};
832
833static int tegra_cursor_atomic_check(struct drm_plane *plane,
834 struct drm_plane_state *state)
835{
836 struct tegra_plane *tegra = to_tegra_plane(plane);
837 int err;
838
839 /* no need for further checks if the plane is being disabled */
840 if (!state->crtc)
841 return 0;
842
843 /* scaling not supported for cursor */
844 if ((state->src_w >> 16 != state->crtc_w) ||
845 (state->src_h >> 16 != state->crtc_h))
846 return -EINVAL;
847
848 /* only square cursors supported */
849 if (state->src_w != state->src_h)
850 return -EINVAL;
851
852 if (state->crtc_w != 32 && state->crtc_w != 64 &&
853 state->crtc_w != 128 && state->crtc_w != 256)
854 return -EINVAL;
855
856 err = tegra_plane_state_add(tegra, state);
857 if (err < 0)
858 return err;
859
860 return 0;
861}
862
863static void tegra_cursor_atomic_update(struct drm_plane *plane,
864 struct drm_plane_state *old_state)
865{
866 struct tegra_plane_state *state = to_tegra_plane_state(plane->state);
867 struct tegra_dc *dc = to_tegra_dc(plane->state->crtc);
868 u32 value = CURSOR_CLIP_DISPLAY;
869
870 /* rien ne va plus */
871 if (!plane->state->crtc || !plane->state->fb)
872 return;
873
874 switch (plane->state->crtc_w) {
875 case 32:
876 value |= CURSOR_SIZE_32x32;
877 break;
878
879 case 64:
880 value |= CURSOR_SIZE_64x64;
881 break;
882
883 case 128:
884 value |= CURSOR_SIZE_128x128;
885 break;
886
887 case 256:
888 value |= CURSOR_SIZE_256x256;
889 break;
890
891 default:
892 WARN(1, "cursor size %ux%u not supported\n",
893 plane->state->crtc_w, plane->state->crtc_h);
894 return;
895 }
896
897 value |= (state->iova[0] >> 10) & 0x3fffff;
898 tegra_dc_writel(dc, value, DC_DISP_CURSOR_START_ADDR);
899
900#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
901 value = (state->iova[0] >> 32) & 0x3;
902 tegra_dc_writel(dc, value, DC_DISP_CURSOR_START_ADDR_HI);
903#endif
904
905 /* enable cursor and set blend mode */
906 value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
907 value |= CURSOR_ENABLE;
908 tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
909
910 value = tegra_dc_readl(dc, DC_DISP_BLEND_CURSOR_CONTROL);
911 value &= ~CURSOR_DST_BLEND_MASK;
912 value &= ~CURSOR_SRC_BLEND_MASK;
913 value |= CURSOR_MODE_NORMAL;
914 value |= CURSOR_DST_BLEND_NEG_K1_TIMES_SRC;
915 value |= CURSOR_SRC_BLEND_K1_TIMES_SRC;
916 value |= CURSOR_ALPHA;
917 tegra_dc_writel(dc, value, DC_DISP_BLEND_CURSOR_CONTROL);
918
919 /* position the cursor */
920 value = (plane->state->crtc_y & 0x3fff) << 16 |
921 (plane->state->crtc_x & 0x3fff);
922 tegra_dc_writel(dc, value, DC_DISP_CURSOR_POSITION);
923}
924
925static void tegra_cursor_atomic_disable(struct drm_plane *plane,
926 struct drm_plane_state *old_state)
927{
928 struct tegra_dc *dc;
929 u32 value;
930
931 /* rien ne va plus */
932 if (!old_state || !old_state->crtc)
933 return;
934
935 dc = to_tegra_dc(old_state->crtc);
936
937 value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
938 value &= ~CURSOR_ENABLE;
939 tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
940}
941
942static const struct drm_plane_helper_funcs tegra_cursor_plane_helper_funcs = {
943 .prepare_fb = tegra_plane_prepare_fb,
944 .cleanup_fb = tegra_plane_cleanup_fb,
945 .atomic_check = tegra_cursor_atomic_check,
946 .atomic_update = tegra_cursor_atomic_update,
947 .atomic_disable = tegra_cursor_atomic_disable,
948};
949
950static struct drm_plane *tegra_dc_cursor_plane_create(struct drm_device *drm,
951 struct tegra_dc *dc)
952{
953 unsigned long possible_crtcs = tegra_plane_get_possible_crtcs(drm);
954 struct tegra_plane *plane;
955 unsigned int num_formats;
956 const u32 *formats;
957 int err;
958
959 plane = kzalloc(sizeof(*plane), GFP_KERNEL);
960 if (!plane)
961 return ERR_PTR(-ENOMEM);
962
963 /*
964 * This index is kind of fake. The cursor isn't a regular plane, but
965 * its update and activation request bits in DC_CMD_STATE_CONTROL do
966 * use the same programming. Setting this fake index here allows the
967 * code in tegra_add_plane_state() to do the right thing without the
968 * need to special-casing the cursor plane.
969 */
970 plane->index = 6;
971 plane->dc = dc;
972
973 num_formats = ARRAY_SIZE(tegra_cursor_plane_formats);
974 formats = tegra_cursor_plane_formats;
975
976 err = drm_universal_plane_init(drm, &plane->base, possible_crtcs,
977 &tegra_plane_funcs, formats,
978 num_formats, NULL,
979 DRM_PLANE_TYPE_CURSOR, NULL);
980 if (err < 0) {
981 kfree(plane);
982 return ERR_PTR(err);
983 }
984
985 drm_plane_helper_add(&plane->base, &tegra_cursor_plane_helper_funcs);
986 drm_plane_create_zpos_immutable_property(&plane->base, 255);
987
988 return &plane->base;
989}
990
991static const u32 tegra20_overlay_formats[] = {
992 DRM_FORMAT_ARGB4444,
993 DRM_FORMAT_ARGB1555,
994 DRM_FORMAT_RGB565,
995 DRM_FORMAT_RGBA5551,
996 DRM_FORMAT_ABGR8888,
997 DRM_FORMAT_ARGB8888,
998 /* non-native formats */
999 DRM_FORMAT_XRGB1555,
1000 DRM_FORMAT_RGBX5551,
1001 DRM_FORMAT_XBGR8888,
1002 DRM_FORMAT_XRGB8888,
1003 /* planar formats */
1004 DRM_FORMAT_UYVY,
1005 DRM_FORMAT_YUYV,
1006 DRM_FORMAT_YUV420,
1007 DRM_FORMAT_YUV422,
1008};
1009
1010static const u32 tegra114_overlay_formats[] = {
1011 DRM_FORMAT_ARGB4444,
1012 DRM_FORMAT_ARGB1555,
1013 DRM_FORMAT_RGB565,
1014 DRM_FORMAT_RGBA5551,
1015 DRM_FORMAT_ABGR8888,
1016 DRM_FORMAT_ARGB8888,
1017 /* new on Tegra114 */
1018 DRM_FORMAT_ABGR4444,
1019 DRM_FORMAT_ABGR1555,
1020 DRM_FORMAT_BGRA5551,
1021 DRM_FORMAT_XRGB1555,
1022 DRM_FORMAT_RGBX5551,
1023 DRM_FORMAT_XBGR1555,
1024 DRM_FORMAT_BGRX5551,
1025 DRM_FORMAT_BGR565,
1026 DRM_FORMAT_BGRA8888,
1027 DRM_FORMAT_RGBA8888,
1028 DRM_FORMAT_XRGB8888,
1029 DRM_FORMAT_XBGR8888,
1030 /* planar formats */
1031 DRM_FORMAT_UYVY,
1032 DRM_FORMAT_YUYV,
1033 DRM_FORMAT_YUV420,
1034 DRM_FORMAT_YUV422,
1035};
1036
1037static const u32 tegra124_overlay_formats[] = {
1038 DRM_FORMAT_ARGB4444,
1039 DRM_FORMAT_ARGB1555,
1040 DRM_FORMAT_RGB565,
1041 DRM_FORMAT_RGBA5551,
1042 DRM_FORMAT_ABGR8888,
1043 DRM_FORMAT_ARGB8888,
1044 /* new on Tegra114 */
1045 DRM_FORMAT_ABGR4444,
1046 DRM_FORMAT_ABGR1555,
1047 DRM_FORMAT_BGRA5551,
1048 DRM_FORMAT_XRGB1555,
1049 DRM_FORMAT_RGBX5551,
1050 DRM_FORMAT_XBGR1555,
1051 DRM_FORMAT_BGRX5551,
1052 DRM_FORMAT_BGR565,
1053 DRM_FORMAT_BGRA8888,
1054 DRM_FORMAT_RGBA8888,
1055 DRM_FORMAT_XRGB8888,
1056 DRM_FORMAT_XBGR8888,
1057 /* new on Tegra124 */
1058 DRM_FORMAT_RGBX8888,
1059 DRM_FORMAT_BGRX8888,
1060 /* planar formats */
1061 DRM_FORMAT_UYVY,
1062 DRM_FORMAT_YUYV,
1063 DRM_FORMAT_YUV420,
1064 DRM_FORMAT_YUV422,
1065};
1066
1067static struct drm_plane *tegra_dc_overlay_plane_create(struct drm_device *drm,
1068 struct tegra_dc *dc,
1069 unsigned int index,
1070 bool cursor)
1071{
1072 unsigned long possible_crtcs = tegra_plane_get_possible_crtcs(drm);
1073 struct tegra_plane *plane;
1074 unsigned int num_formats;
1075 enum drm_plane_type type;
1076 const u32 *formats;
1077 int err;
1078
1079 plane = kzalloc(sizeof(*plane), GFP_KERNEL);
1080 if (!plane)
1081 return ERR_PTR(-ENOMEM);
1082
1083 plane->offset = 0xa00 + 0x200 * index;
1084 plane->index = index;
1085 plane->dc = dc;
1086
1087 num_formats = dc->soc->num_overlay_formats;
1088 formats = dc->soc->overlay_formats;
1089
1090 if (!cursor)
1091 type = DRM_PLANE_TYPE_OVERLAY;
1092 else
1093 type = DRM_PLANE_TYPE_CURSOR;
1094
1095 err = drm_universal_plane_init(drm, &plane->base, possible_crtcs,
1096 &tegra_plane_funcs, formats,
1097 num_formats, NULL, type, NULL);
1098 if (err < 0) {
1099 kfree(plane);
1100 return ERR_PTR(err);
1101 }
1102
1103 drm_plane_helper_add(&plane->base, &tegra_plane_helper_funcs);
1104 drm_plane_create_zpos_property(&plane->base, plane->index, 0, 255);
1105
1106 err = drm_plane_create_rotation_property(&plane->base,
1107 DRM_MODE_ROTATE_0,
1108 DRM_MODE_ROTATE_0 |
1109 DRM_MODE_ROTATE_180 |
1110 DRM_MODE_REFLECT_X |
1111 DRM_MODE_REFLECT_Y);
1112 if (err < 0)
1113 dev_err(dc->dev, "failed to create rotation property: %d\n",
1114 err);
1115
1116 return &plane->base;
1117}
1118
1119static struct drm_plane *tegra_dc_add_shared_planes(struct drm_device *drm,
1120 struct tegra_dc *dc)
1121{
1122 struct drm_plane *plane, *primary = NULL;
1123 unsigned int i, j;
1124
1125 for (i = 0; i < dc->soc->num_wgrps; i++) {
1126 const struct tegra_windowgroup_soc *wgrp = &dc->soc->wgrps[i];
1127
1128 if (wgrp->dc == dc->pipe) {
1129 for (j = 0; j < wgrp->num_windows; j++) {
1130 unsigned int index = wgrp->windows[j];
1131
1132 plane = tegra_shared_plane_create(drm, dc,
1133 wgrp->index,
1134 index);
1135 if (IS_ERR(plane))
1136 return plane;
1137
1138 /*
1139 * Choose the first shared plane owned by this
1140 * head as the primary plane.
1141 */
1142 if (!primary) {
1143 plane->type = DRM_PLANE_TYPE_PRIMARY;
1144 primary = plane;
1145 }
1146 }
1147 }
1148 }
1149
1150 return primary;
1151}
1152
1153static struct drm_plane *tegra_dc_add_planes(struct drm_device *drm,
1154 struct tegra_dc *dc)
1155{
1156 struct drm_plane *planes[2], *primary;
1157 unsigned int planes_num;
1158 unsigned int i;
1159 int err;
1160
1161 primary = tegra_primary_plane_create(drm, dc);
1162 if (IS_ERR(primary))
1163 return primary;
1164
1165 if (dc->soc->supports_cursor)
1166 planes_num = 2;
1167 else
1168 planes_num = 1;
1169
1170 for (i = 0; i < planes_num; i++) {
1171 planes[i] = tegra_dc_overlay_plane_create(drm, dc, 1 + i,
1172 false);
1173 if (IS_ERR(planes[i])) {
1174 err = PTR_ERR(planes[i]);
1175
1176 while (i--)
1177 tegra_plane_funcs.destroy(planes[i]);
1178
1179 tegra_plane_funcs.destroy(primary);
1180 return ERR_PTR(err);
1181 }
1182 }
1183
1184 return primary;
1185}
1186
1187static void tegra_dc_destroy(struct drm_crtc *crtc)
1188{
1189 drm_crtc_cleanup(crtc);
1190}
1191
1192static void tegra_crtc_reset(struct drm_crtc *crtc)
1193{
1194 struct tegra_dc_state *state = kzalloc(sizeof(*state), GFP_KERNEL);
1195
1196 if (crtc->state)
1197 tegra_crtc_atomic_destroy_state(crtc, crtc->state);
1198
1199 __drm_atomic_helper_crtc_reset(crtc, &state->base);
1200}
1201
1202static struct drm_crtc_state *
1203tegra_crtc_atomic_duplicate_state(struct drm_crtc *crtc)
1204{
1205 struct tegra_dc_state *state = to_dc_state(crtc->state);
1206 struct tegra_dc_state *copy;
1207
1208 copy = kmalloc(sizeof(*copy), GFP_KERNEL);
1209 if (!copy)
1210 return NULL;
1211
1212 __drm_atomic_helper_crtc_duplicate_state(crtc, ©->base);
1213 copy->clk = state->clk;
1214 copy->pclk = state->pclk;
1215 copy->div = state->div;
1216 copy->planes = state->planes;
1217
1218 return ©->base;
1219}
1220
1221static void tegra_crtc_atomic_destroy_state(struct drm_crtc *crtc,
1222 struct drm_crtc_state *state)
1223{
1224 __drm_atomic_helper_crtc_destroy_state(state);
1225 kfree(state);
1226}
1227
1228#define DEBUGFS_REG32(_name) { .name = #_name, .offset = _name }
1229
1230static const struct debugfs_reg32 tegra_dc_regs[] = {
1231 DEBUGFS_REG32(DC_CMD_GENERAL_INCR_SYNCPT),
1232 DEBUGFS_REG32(DC_CMD_GENERAL_INCR_SYNCPT_CNTRL),
1233 DEBUGFS_REG32(DC_CMD_GENERAL_INCR_SYNCPT_ERROR),
1234 DEBUGFS_REG32(DC_CMD_WIN_A_INCR_SYNCPT),
1235 DEBUGFS_REG32(DC_CMD_WIN_A_INCR_SYNCPT_CNTRL),
1236 DEBUGFS_REG32(DC_CMD_WIN_A_INCR_SYNCPT_ERROR),
1237 DEBUGFS_REG32(DC_CMD_WIN_B_INCR_SYNCPT),
1238 DEBUGFS_REG32(DC_CMD_WIN_B_INCR_SYNCPT_CNTRL),
1239 DEBUGFS_REG32(DC_CMD_WIN_B_INCR_SYNCPT_ERROR),
1240 DEBUGFS_REG32(DC_CMD_WIN_C_INCR_SYNCPT),
1241 DEBUGFS_REG32(DC_CMD_WIN_C_INCR_SYNCPT_CNTRL),
1242 DEBUGFS_REG32(DC_CMD_WIN_C_INCR_SYNCPT_ERROR),
1243 DEBUGFS_REG32(DC_CMD_CONT_SYNCPT_VSYNC),
1244 DEBUGFS_REG32(DC_CMD_DISPLAY_COMMAND_OPTION0),
1245 DEBUGFS_REG32(DC_CMD_DISPLAY_COMMAND),
1246 DEBUGFS_REG32(DC_CMD_SIGNAL_RAISE),
1247 DEBUGFS_REG32(DC_CMD_DISPLAY_POWER_CONTROL),
1248 DEBUGFS_REG32(DC_CMD_INT_STATUS),
1249 DEBUGFS_REG32(DC_CMD_INT_MASK),
1250 DEBUGFS_REG32(DC_CMD_INT_ENABLE),
1251 DEBUGFS_REG32(DC_CMD_INT_TYPE),
1252 DEBUGFS_REG32(DC_CMD_INT_POLARITY),
1253 DEBUGFS_REG32(DC_CMD_SIGNAL_RAISE1),
1254 DEBUGFS_REG32(DC_CMD_SIGNAL_RAISE2),
1255 DEBUGFS_REG32(DC_CMD_SIGNAL_RAISE3),
1256 DEBUGFS_REG32(DC_CMD_STATE_ACCESS),
1257 DEBUGFS_REG32(DC_CMD_STATE_CONTROL),
1258 DEBUGFS_REG32(DC_CMD_DISPLAY_WINDOW_HEADER),
1259 DEBUGFS_REG32(DC_CMD_REG_ACT_CONTROL),
1260 DEBUGFS_REG32(DC_COM_CRC_CONTROL),
1261 DEBUGFS_REG32(DC_COM_CRC_CHECKSUM),
1262 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_ENABLE(0)),
1263 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_ENABLE(1)),
1264 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_ENABLE(2)),
1265 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_ENABLE(3)),
1266 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_POLARITY(0)),
1267 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_POLARITY(1)),
1268 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_POLARITY(2)),
1269 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_POLARITY(3)),
1270 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_DATA(0)),
1271 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_DATA(1)),
1272 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_DATA(2)),
1273 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_DATA(3)),
1274 DEBUGFS_REG32(DC_COM_PIN_INPUT_ENABLE(0)),
1275 DEBUGFS_REG32(DC_COM_PIN_INPUT_ENABLE(1)),
1276 DEBUGFS_REG32(DC_COM_PIN_INPUT_ENABLE(2)),
1277 DEBUGFS_REG32(DC_COM_PIN_INPUT_ENABLE(3)),
1278 DEBUGFS_REG32(DC_COM_PIN_INPUT_DATA(0)),
1279 DEBUGFS_REG32(DC_COM_PIN_INPUT_DATA(1)),
1280 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(0)),
1281 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(1)),
1282 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(2)),
1283 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(3)),
1284 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(4)),
1285 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(5)),
1286 DEBUGFS_REG32(DC_COM_PIN_OUTPUT_SELECT(6)),
1287 DEBUGFS_REG32(DC_COM_PIN_MISC_CONTROL),
1288 DEBUGFS_REG32(DC_COM_PIN_PM0_CONTROL),
1289 DEBUGFS_REG32(DC_COM_PIN_PM0_DUTY_CYCLE),
1290 DEBUGFS_REG32(DC_COM_PIN_PM1_CONTROL),
1291 DEBUGFS_REG32(DC_COM_PIN_PM1_DUTY_CYCLE),
1292 DEBUGFS_REG32(DC_COM_SPI_CONTROL),
1293 DEBUGFS_REG32(DC_COM_SPI_START_BYTE),
1294 DEBUGFS_REG32(DC_COM_HSPI_WRITE_DATA_AB),
1295 DEBUGFS_REG32(DC_COM_HSPI_WRITE_DATA_CD),
1296 DEBUGFS_REG32(DC_COM_HSPI_CS_DC),
1297 DEBUGFS_REG32(DC_COM_SCRATCH_REGISTER_A),
1298 DEBUGFS_REG32(DC_COM_SCRATCH_REGISTER_B),
1299 DEBUGFS_REG32(DC_COM_GPIO_CTRL),
1300 DEBUGFS_REG32(DC_COM_GPIO_DEBOUNCE_COUNTER),
1301 DEBUGFS_REG32(DC_COM_CRC_CHECKSUM_LATCHED),
1302 DEBUGFS_REG32(DC_DISP_DISP_SIGNAL_OPTIONS0),
1303 DEBUGFS_REG32(DC_DISP_DISP_SIGNAL_OPTIONS1),
1304 DEBUGFS_REG32(DC_DISP_DISP_WIN_OPTIONS),
1305 DEBUGFS_REG32(DC_DISP_DISP_MEM_HIGH_PRIORITY),
1306 DEBUGFS_REG32(DC_DISP_DISP_MEM_HIGH_PRIORITY_TIMER),
1307 DEBUGFS_REG32(DC_DISP_DISP_TIMING_OPTIONS),
1308 DEBUGFS_REG32(DC_DISP_REF_TO_SYNC),
1309 DEBUGFS_REG32(DC_DISP_SYNC_WIDTH),
1310 DEBUGFS_REG32(DC_DISP_BACK_PORCH),
1311 DEBUGFS_REG32(DC_DISP_ACTIVE),
1312 DEBUGFS_REG32(DC_DISP_FRONT_PORCH),
1313 DEBUGFS_REG32(DC_DISP_H_PULSE0_CONTROL),
1314 DEBUGFS_REG32(DC_DISP_H_PULSE0_POSITION_A),
1315 DEBUGFS_REG32(DC_DISP_H_PULSE0_POSITION_B),
1316 DEBUGFS_REG32(DC_DISP_H_PULSE0_POSITION_C),
1317 DEBUGFS_REG32(DC_DISP_H_PULSE0_POSITION_D),
1318 DEBUGFS_REG32(DC_DISP_H_PULSE1_CONTROL),
1319 DEBUGFS_REG32(DC_DISP_H_PULSE1_POSITION_A),
1320 DEBUGFS_REG32(DC_DISP_H_PULSE1_POSITION_B),
1321 DEBUGFS_REG32(DC_DISP_H_PULSE1_POSITION_C),
1322 DEBUGFS_REG32(DC_DISP_H_PULSE1_POSITION_D),
1323 DEBUGFS_REG32(DC_DISP_H_PULSE2_CONTROL),
1324 DEBUGFS_REG32(DC_DISP_H_PULSE2_POSITION_A),
1325 DEBUGFS_REG32(DC_DISP_H_PULSE2_POSITION_B),
1326 DEBUGFS_REG32(DC_DISP_H_PULSE2_POSITION_C),
1327 DEBUGFS_REG32(DC_DISP_H_PULSE2_POSITION_D),
1328 DEBUGFS_REG32(DC_DISP_V_PULSE0_CONTROL),
1329 DEBUGFS_REG32(DC_DISP_V_PULSE0_POSITION_A),
1330 DEBUGFS_REG32(DC_DISP_V_PULSE0_POSITION_B),
1331 DEBUGFS_REG32(DC_DISP_V_PULSE0_POSITION_C),
1332 DEBUGFS_REG32(DC_DISP_V_PULSE1_CONTROL),
1333 DEBUGFS_REG32(DC_DISP_V_PULSE1_POSITION_A),
1334 DEBUGFS_REG32(DC_DISP_V_PULSE1_POSITION_B),
1335 DEBUGFS_REG32(DC_DISP_V_PULSE1_POSITION_C),
1336 DEBUGFS_REG32(DC_DISP_V_PULSE2_CONTROL),
1337 DEBUGFS_REG32(DC_DISP_V_PULSE2_POSITION_A),
1338 DEBUGFS_REG32(DC_DISP_V_PULSE3_CONTROL),
1339 DEBUGFS_REG32(DC_DISP_V_PULSE3_POSITION_A),
1340 DEBUGFS_REG32(DC_DISP_M0_CONTROL),
1341 DEBUGFS_REG32(DC_DISP_M1_CONTROL),
1342 DEBUGFS_REG32(DC_DISP_DI_CONTROL),
1343 DEBUGFS_REG32(DC_DISP_PP_CONTROL),
1344 DEBUGFS_REG32(DC_DISP_PP_SELECT_A),
1345 DEBUGFS_REG32(DC_DISP_PP_SELECT_B),
1346 DEBUGFS_REG32(DC_DISP_PP_SELECT_C),
1347 DEBUGFS_REG32(DC_DISP_PP_SELECT_D),
1348 DEBUGFS_REG32(DC_DISP_DISP_CLOCK_CONTROL),
1349 DEBUGFS_REG32(DC_DISP_DISP_INTERFACE_CONTROL),
1350 DEBUGFS_REG32(DC_DISP_DISP_COLOR_CONTROL),
1351 DEBUGFS_REG32(DC_DISP_SHIFT_CLOCK_OPTIONS),
1352 DEBUGFS_REG32(DC_DISP_DATA_ENABLE_OPTIONS),
1353 DEBUGFS_REG32(DC_DISP_SERIAL_INTERFACE_OPTIONS),
1354 DEBUGFS_REG32(DC_DISP_LCD_SPI_OPTIONS),
1355 DEBUGFS_REG32(DC_DISP_BORDER_COLOR),
1356 DEBUGFS_REG32(DC_DISP_COLOR_KEY0_LOWER),
1357 DEBUGFS_REG32(DC_DISP_COLOR_KEY0_UPPER),
1358 DEBUGFS_REG32(DC_DISP_COLOR_KEY1_LOWER),
1359 DEBUGFS_REG32(DC_DISP_COLOR_KEY1_UPPER),
1360 DEBUGFS_REG32(DC_DISP_CURSOR_FOREGROUND),
1361 DEBUGFS_REG32(DC_DISP_CURSOR_BACKGROUND),
1362 DEBUGFS_REG32(DC_DISP_CURSOR_START_ADDR),
1363 DEBUGFS_REG32(DC_DISP_CURSOR_START_ADDR_NS),
1364 DEBUGFS_REG32(DC_DISP_CURSOR_POSITION),
1365 DEBUGFS_REG32(DC_DISP_CURSOR_POSITION_NS),
1366 DEBUGFS_REG32(DC_DISP_INIT_SEQ_CONTROL),
1367 DEBUGFS_REG32(DC_DISP_SPI_INIT_SEQ_DATA_A),
1368 DEBUGFS_REG32(DC_DISP_SPI_INIT_SEQ_DATA_B),
1369 DEBUGFS_REG32(DC_DISP_SPI_INIT_SEQ_DATA_C),
1370 DEBUGFS_REG32(DC_DISP_SPI_INIT_SEQ_DATA_D),
1371 DEBUGFS_REG32(DC_DISP_DC_MCCIF_FIFOCTRL),
1372 DEBUGFS_REG32(DC_DISP_MCCIF_DISPLAY0A_HYST),
1373 DEBUGFS_REG32(DC_DISP_MCCIF_DISPLAY0B_HYST),
1374 DEBUGFS_REG32(DC_DISP_MCCIF_DISPLAY1A_HYST),
1375 DEBUGFS_REG32(DC_DISP_MCCIF_DISPLAY1B_HYST),
1376 DEBUGFS_REG32(DC_DISP_DAC_CRT_CTRL),
1377 DEBUGFS_REG32(DC_DISP_DISP_MISC_CONTROL),
1378 DEBUGFS_REG32(DC_DISP_SD_CONTROL),
1379 DEBUGFS_REG32(DC_DISP_SD_CSC_COEFF),
1380 DEBUGFS_REG32(DC_DISP_SD_LUT(0)),
1381 DEBUGFS_REG32(DC_DISP_SD_LUT(1)),
1382 DEBUGFS_REG32(DC_DISP_SD_LUT(2)),
1383 DEBUGFS_REG32(DC_DISP_SD_LUT(3)),
1384 DEBUGFS_REG32(DC_DISP_SD_LUT(4)),
1385 DEBUGFS_REG32(DC_DISP_SD_LUT(5)),
1386 DEBUGFS_REG32(DC_DISP_SD_LUT(6)),
1387 DEBUGFS_REG32(DC_DISP_SD_LUT(7)),
1388 DEBUGFS_REG32(DC_DISP_SD_LUT(8)),
1389 DEBUGFS_REG32(DC_DISP_SD_FLICKER_CONTROL),
1390 DEBUGFS_REG32(DC_DISP_DC_PIXEL_COUNT),
1391 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(0)),
1392 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(1)),
1393 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(2)),
1394 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(3)),
1395 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(4)),
1396 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(5)),
1397 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(6)),
1398 DEBUGFS_REG32(DC_DISP_SD_HISTOGRAM(7)),
1399 DEBUGFS_REG32(DC_DISP_SD_BL_TF(0)),
1400 DEBUGFS_REG32(DC_DISP_SD_BL_TF(1)),
1401 DEBUGFS_REG32(DC_DISP_SD_BL_TF(2)),
1402 DEBUGFS_REG32(DC_DISP_SD_BL_TF(3)),
1403 DEBUGFS_REG32(DC_DISP_SD_BL_CONTROL),
1404 DEBUGFS_REG32(DC_DISP_SD_HW_K_VALUES),
1405 DEBUGFS_REG32(DC_DISP_SD_MAN_K_VALUES),
1406 DEBUGFS_REG32(DC_DISP_CURSOR_START_ADDR_HI),
1407 DEBUGFS_REG32(DC_DISP_BLEND_CURSOR_CONTROL),
1408 DEBUGFS_REG32(DC_WIN_WIN_OPTIONS),
1409 DEBUGFS_REG32(DC_WIN_BYTE_SWAP),
1410 DEBUGFS_REG32(DC_WIN_BUFFER_CONTROL),
1411 DEBUGFS_REG32(DC_WIN_COLOR_DEPTH),
1412 DEBUGFS_REG32(DC_WIN_POSITION),
1413 DEBUGFS_REG32(DC_WIN_SIZE),
1414 DEBUGFS_REG32(DC_WIN_PRESCALED_SIZE),
1415 DEBUGFS_REG32(DC_WIN_H_INITIAL_DDA),
1416 DEBUGFS_REG32(DC_WIN_V_INITIAL_DDA),
1417 DEBUGFS_REG32(DC_WIN_DDA_INC),
1418 DEBUGFS_REG32(DC_WIN_LINE_STRIDE),
1419 DEBUGFS_REG32(DC_WIN_BUF_STRIDE),
1420 DEBUGFS_REG32(DC_WIN_UV_BUF_STRIDE),
1421 DEBUGFS_REG32(DC_WIN_BUFFER_ADDR_MODE),
1422 DEBUGFS_REG32(DC_WIN_DV_CONTROL),
1423 DEBUGFS_REG32(DC_WIN_BLEND_NOKEY),
1424 DEBUGFS_REG32(DC_WIN_BLEND_1WIN),
1425 DEBUGFS_REG32(DC_WIN_BLEND_2WIN_X),
1426 DEBUGFS_REG32(DC_WIN_BLEND_2WIN_Y),
1427 DEBUGFS_REG32(DC_WIN_BLEND_3WIN_XY),
1428 DEBUGFS_REG32(DC_WIN_HP_FETCH_CONTROL),
1429 DEBUGFS_REG32(DC_WINBUF_START_ADDR),
1430 DEBUGFS_REG32(DC_WINBUF_START_ADDR_NS),
1431 DEBUGFS_REG32(DC_WINBUF_START_ADDR_U),
1432 DEBUGFS_REG32(DC_WINBUF_START_ADDR_U_NS),
1433 DEBUGFS_REG32(DC_WINBUF_START_ADDR_V),
1434 DEBUGFS_REG32(DC_WINBUF_START_ADDR_V_NS),
1435 DEBUGFS_REG32(DC_WINBUF_ADDR_H_OFFSET),
1436 DEBUGFS_REG32(DC_WINBUF_ADDR_H_OFFSET_NS),
1437 DEBUGFS_REG32(DC_WINBUF_ADDR_V_OFFSET),
1438 DEBUGFS_REG32(DC_WINBUF_ADDR_V_OFFSET_NS),
1439 DEBUGFS_REG32(DC_WINBUF_UFLOW_STATUS),
1440 DEBUGFS_REG32(DC_WINBUF_AD_UFLOW_STATUS),
1441 DEBUGFS_REG32(DC_WINBUF_BD_UFLOW_STATUS),
1442 DEBUGFS_REG32(DC_WINBUF_CD_UFLOW_STATUS),
1443};
1444
1445static int tegra_dc_show_regs(struct seq_file *s, void *data)
1446{
1447 struct drm_info_node *node = s->private;
1448 struct tegra_dc *dc = node->info_ent->data;
1449 unsigned int i;
1450 int err = 0;
1451
1452 drm_modeset_lock(&dc->base.mutex, NULL);
1453
1454 if (!dc->base.state->active) {
1455 err = -EBUSY;
1456 goto unlock;
1457 }
1458
1459 for (i = 0; i < ARRAY_SIZE(tegra_dc_regs); i++) {
1460 unsigned int offset = tegra_dc_regs[i].offset;
1461
1462 seq_printf(s, "%-40s %#05x %08x\n", tegra_dc_regs[i].name,
1463 offset, tegra_dc_readl(dc, offset));
1464 }
1465
1466unlock:
1467 drm_modeset_unlock(&dc->base.mutex);
1468 return err;
1469}
1470
1471static int tegra_dc_show_crc(struct seq_file *s, void *data)
1472{
1473 struct drm_info_node *node = s->private;
1474 struct tegra_dc *dc = node->info_ent->data;
1475 int err = 0;
1476 u32 value;
1477
1478 drm_modeset_lock(&dc->base.mutex, NULL);
1479
1480 if (!dc->base.state->active) {
1481 err = -EBUSY;
1482 goto unlock;
1483 }
1484
1485 value = DC_COM_CRC_CONTROL_ACTIVE_DATA | DC_COM_CRC_CONTROL_ENABLE;
1486 tegra_dc_writel(dc, value, DC_COM_CRC_CONTROL);
1487 tegra_dc_commit(dc);
1488
1489 drm_crtc_wait_one_vblank(&dc->base);
1490 drm_crtc_wait_one_vblank(&dc->base);
1491
1492 value = tegra_dc_readl(dc, DC_COM_CRC_CHECKSUM);
1493 seq_printf(s, "%08x\n", value);
1494
1495 tegra_dc_writel(dc, 0, DC_COM_CRC_CONTROL);
1496
1497unlock:
1498 drm_modeset_unlock(&dc->base.mutex);
1499 return err;
1500}
1501
1502static int tegra_dc_show_stats(struct seq_file *s, void *data)
1503{
1504 struct drm_info_node *node = s->private;
1505 struct tegra_dc *dc = node->info_ent->data;
1506
1507 seq_printf(s, "frames: %lu\n", dc->stats.frames);
1508 seq_printf(s, "vblank: %lu\n", dc->stats.vblank);
1509 seq_printf(s, "underflow: %lu\n", dc->stats.underflow);
1510 seq_printf(s, "overflow: %lu\n", dc->stats.overflow);
1511
1512 return 0;
1513}
1514
1515static struct drm_info_list debugfs_files[] = {
1516 { "regs", tegra_dc_show_regs, 0, NULL },
1517 { "crc", tegra_dc_show_crc, 0, NULL },
1518 { "stats", tegra_dc_show_stats, 0, NULL },
1519};
1520
1521static int tegra_dc_late_register(struct drm_crtc *crtc)
1522{
1523 unsigned int i, count = ARRAY_SIZE(debugfs_files);
1524 struct drm_minor *minor = crtc->dev->primary;
1525 struct dentry *root;
1526 struct tegra_dc *dc = to_tegra_dc(crtc);
1527
1528#ifdef CONFIG_DEBUG_FS
1529 root = crtc->debugfs_entry;
1530#else
1531 root = NULL;
1532#endif
1533
1534 dc->debugfs_files = kmemdup(debugfs_files, sizeof(debugfs_files),
1535 GFP_KERNEL);
1536 if (!dc->debugfs_files)
1537 return -ENOMEM;
1538
1539 for (i = 0; i < count; i++)
1540 dc->debugfs_files[i].data = dc;
1541
1542 drm_debugfs_create_files(dc->debugfs_files, count, root, minor);
1543
1544 return 0;
1545}
1546
1547static void tegra_dc_early_unregister(struct drm_crtc *crtc)
1548{
1549 unsigned int count = ARRAY_SIZE(debugfs_files);
1550 struct drm_minor *minor = crtc->dev->primary;
1551 struct tegra_dc *dc = to_tegra_dc(crtc);
1552
1553 drm_debugfs_remove_files(dc->debugfs_files, count, minor);
1554 kfree(dc->debugfs_files);
1555 dc->debugfs_files = NULL;
1556}
1557
1558static u32 tegra_dc_get_vblank_counter(struct drm_crtc *crtc)
1559{
1560 struct tegra_dc *dc = to_tegra_dc(crtc);
1561
1562 /* XXX vblank syncpoints don't work with nvdisplay yet */
1563 if (dc->syncpt && !dc->soc->has_nvdisplay)
1564 return host1x_syncpt_read(dc->syncpt);
1565
1566 /* fallback to software emulated VBLANK counter */
1567 return (u32)drm_crtc_vblank_count(&dc->base);
1568}
1569
1570static int tegra_dc_enable_vblank(struct drm_crtc *crtc)
1571{
1572 struct tegra_dc *dc = to_tegra_dc(crtc);
1573 u32 value;
1574
1575 value = tegra_dc_readl(dc, DC_CMD_INT_MASK);
1576 value |= VBLANK_INT;
1577 tegra_dc_writel(dc, value, DC_CMD_INT_MASK);
1578
1579 return 0;
1580}
1581
1582static void tegra_dc_disable_vblank(struct drm_crtc *crtc)
1583{
1584 struct tegra_dc *dc = to_tegra_dc(crtc);
1585 u32 value;
1586
1587 value = tegra_dc_readl(dc, DC_CMD_INT_MASK);
1588 value &= ~VBLANK_INT;
1589 tegra_dc_writel(dc, value, DC_CMD_INT_MASK);
1590}
1591
1592static const struct drm_crtc_funcs tegra_crtc_funcs = {
1593 .page_flip = drm_atomic_helper_page_flip,
1594 .set_config = drm_atomic_helper_set_config,
1595 .destroy = tegra_dc_destroy,
1596 .reset = tegra_crtc_reset,
1597 .atomic_duplicate_state = tegra_crtc_atomic_duplicate_state,
1598 .atomic_destroy_state = tegra_crtc_atomic_destroy_state,
1599 .late_register = tegra_dc_late_register,
1600 .early_unregister = tegra_dc_early_unregister,
1601 .get_vblank_counter = tegra_dc_get_vblank_counter,
1602 .enable_vblank = tegra_dc_enable_vblank,
1603 .disable_vblank = tegra_dc_disable_vblank,
1604};
1605
1606static int tegra_dc_set_timings(struct tegra_dc *dc,
1607 struct drm_display_mode *mode)
1608{
1609 unsigned int h_ref_to_sync = 1;
1610 unsigned int v_ref_to_sync = 1;
1611 unsigned long value;
1612
1613 if (!dc->soc->has_nvdisplay) {
1614 tegra_dc_writel(dc, 0x0, DC_DISP_DISP_TIMING_OPTIONS);
1615
1616 value = (v_ref_to_sync << 16) | h_ref_to_sync;
1617 tegra_dc_writel(dc, value, DC_DISP_REF_TO_SYNC);
1618 }
1619
1620 value = ((mode->vsync_end - mode->vsync_start) << 16) |
1621 ((mode->hsync_end - mode->hsync_start) << 0);
1622 tegra_dc_writel(dc, value, DC_DISP_SYNC_WIDTH);
1623
1624 value = ((mode->vtotal - mode->vsync_end) << 16) |
1625 ((mode->htotal - mode->hsync_end) << 0);
1626 tegra_dc_writel(dc, value, DC_DISP_BACK_PORCH);
1627
1628 value = ((mode->vsync_start - mode->vdisplay) << 16) |
1629 ((mode->hsync_start - mode->hdisplay) << 0);
1630 tegra_dc_writel(dc, value, DC_DISP_FRONT_PORCH);
1631
1632 value = (mode->vdisplay << 16) | mode->hdisplay;
1633 tegra_dc_writel(dc, value, DC_DISP_ACTIVE);
1634
1635 return 0;
1636}
1637
1638/**
1639 * tegra_dc_state_setup_clock - check clock settings and store them in atomic
1640 * state
1641 * @dc: display controller
1642 * @crtc_state: CRTC atomic state
1643 * @clk: parent clock for display controller
1644 * @pclk: pixel clock
1645 * @div: shift clock divider
1646 *
1647 * Returns:
1648 * 0 on success or a negative error-code on failure.
1649 */
1650int tegra_dc_state_setup_clock(struct tegra_dc *dc,
1651 struct drm_crtc_state *crtc_state,
1652 struct clk *clk, unsigned long pclk,
1653 unsigned int div)
1654{
1655 struct tegra_dc_state *state = to_dc_state(crtc_state);
1656
1657 if (!clk_has_parent(dc->clk, clk))
1658 return -EINVAL;
1659
1660 state->clk = clk;
1661 state->pclk = pclk;
1662 state->div = div;
1663
1664 return 0;
1665}
1666
1667static void tegra_dc_commit_state(struct tegra_dc *dc,
1668 struct tegra_dc_state *state)
1669{
1670 u32 value;
1671 int err;
1672
1673 err = clk_set_parent(dc->clk, state->clk);
1674 if (err < 0)
1675 dev_err(dc->dev, "failed to set parent clock: %d\n", err);
1676
1677 /*
1678 * Outputs may not want to change the parent clock rate. This is only
1679 * relevant to Tegra20 where only a single display PLL is available.
1680 * Since that PLL would typically be used for HDMI, an internal LVDS
1681 * panel would need to be driven by some other clock such as PLL_P
1682 * which is shared with other peripherals. Changing the clock rate
1683 * should therefore be avoided.
1684 */
1685 if (state->pclk > 0) {
1686 err = clk_set_rate(state->clk, state->pclk);
1687 if (err < 0)
1688 dev_err(dc->dev,
1689 "failed to set clock rate to %lu Hz\n",
1690 state->pclk);
1691 }
1692
1693 DRM_DEBUG_KMS("rate: %lu, div: %u\n", clk_get_rate(dc->clk),
1694 state->div);
1695 DRM_DEBUG_KMS("pclk: %lu\n", state->pclk);
1696
1697 if (!dc->soc->has_nvdisplay) {
1698 value = SHIFT_CLK_DIVIDER(state->div) | PIXEL_CLK_DIVIDER_PCD1;
1699 tegra_dc_writel(dc, value, DC_DISP_DISP_CLOCK_CONTROL);
1700 }
1701
1702 err = clk_set_rate(dc->clk, state->pclk);
1703 if (err < 0)
1704 dev_err(dc->dev, "failed to set clock %pC to %lu Hz: %d\n",
1705 dc->clk, state->pclk, err);
1706}
1707
1708static void tegra_dc_stop(struct tegra_dc *dc)
1709{
1710 u32 value;
1711
1712 /* stop the display controller */
1713 value = tegra_dc_readl(dc, DC_CMD_DISPLAY_COMMAND);
1714 value &= ~DISP_CTRL_MODE_MASK;
1715 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_COMMAND);
1716
1717 tegra_dc_commit(dc);
1718}
1719
1720static bool tegra_dc_idle(struct tegra_dc *dc)
1721{
1722 u32 value;
1723
1724 value = tegra_dc_readl_active(dc, DC_CMD_DISPLAY_COMMAND);
1725
1726 return (value & DISP_CTRL_MODE_MASK) == 0;
1727}
1728
1729static int tegra_dc_wait_idle(struct tegra_dc *dc, unsigned long timeout)
1730{
1731 timeout = jiffies + msecs_to_jiffies(timeout);
1732
1733 while (time_before(jiffies, timeout)) {
1734 if (tegra_dc_idle(dc))
1735 return 0;
1736
1737 usleep_range(1000, 2000);
1738 }
1739
1740 dev_dbg(dc->dev, "timeout waiting for DC to become idle\n");
1741 return -ETIMEDOUT;
1742}
1743
1744static void tegra_crtc_atomic_disable(struct drm_crtc *crtc,
1745 struct drm_crtc_state *old_state)
1746{
1747 struct tegra_dc *dc = to_tegra_dc(crtc);
1748 u32 value;
1749 int err;
1750
1751 if (!tegra_dc_idle(dc)) {
1752 tegra_dc_stop(dc);
1753
1754 /*
1755 * Ignore the return value, there isn't anything useful to do
1756 * in case this fails.
1757 */
1758 tegra_dc_wait_idle(dc, 100);
1759 }
1760
1761 /*
1762 * This should really be part of the RGB encoder driver, but clearing
1763 * these bits has the side-effect of stopping the display controller.
1764 * When that happens no VBLANK interrupts will be raised. At the same
1765 * time the encoder is disabled before the display controller, so the
1766 * above code is always going to timeout waiting for the controller
1767 * to go idle.
1768 *
1769 * Given the close coupling between the RGB encoder and the display
1770 * controller doing it here is still kind of okay. None of the other
1771 * encoder drivers require these bits to be cleared.
1772 *
1773 * XXX: Perhaps given that the display controller is switched off at
1774 * this point anyway maybe clearing these bits isn't even useful for
1775 * the RGB encoder?
1776 */
1777 if (dc->rgb) {
1778 value = tegra_dc_readl(dc, DC_CMD_DISPLAY_POWER_CONTROL);
1779 value &= ~(PW0_ENABLE | PW1_ENABLE | PW2_ENABLE | PW3_ENABLE |
1780 PW4_ENABLE | PM0_ENABLE | PM1_ENABLE);
1781 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_POWER_CONTROL);
1782 }
1783
1784 tegra_dc_stats_reset(&dc->stats);
1785 drm_crtc_vblank_off(crtc);
1786
1787 spin_lock_irq(&crtc->dev->event_lock);
1788
1789 if (crtc->state->event) {
1790 drm_crtc_send_vblank_event(crtc, crtc->state->event);
1791 crtc->state->event = NULL;
1792 }
1793
1794 spin_unlock_irq(&crtc->dev->event_lock);
1795
1796 err = host1x_client_suspend(&dc->client);
1797 if (err < 0)
1798 dev_err(dc->dev, "failed to suspend: %d\n", err);
1799}
1800
1801static void tegra_crtc_atomic_enable(struct drm_crtc *crtc,
1802 struct drm_crtc_state *old_state)
1803{
1804 struct drm_display_mode *mode = &crtc->state->adjusted_mode;
1805 struct tegra_dc_state *state = to_dc_state(crtc->state);
1806 struct tegra_dc *dc = to_tegra_dc(crtc);
1807 u32 value;
1808 int err;
1809
1810 err = host1x_client_resume(&dc->client);
1811 if (err < 0) {
1812 dev_err(dc->dev, "failed to resume: %d\n", err);
1813 return;
1814 }
1815
1816 /* initialize display controller */
1817 if (dc->syncpt) {
1818 u32 syncpt = host1x_syncpt_id(dc->syncpt), enable;
1819
1820 if (dc->soc->has_nvdisplay)
1821 enable = 1 << 31;
1822 else
1823 enable = 1 << 8;
1824
1825 value = SYNCPT_CNTRL_NO_STALL;
1826 tegra_dc_writel(dc, value, DC_CMD_GENERAL_INCR_SYNCPT_CNTRL);
1827
1828 value = enable | syncpt;
1829 tegra_dc_writel(dc, value, DC_CMD_CONT_SYNCPT_VSYNC);
1830 }
1831
1832 if (dc->soc->has_nvdisplay) {
1833 value = DSC_TO_UF_INT | DSC_BBUF_UF_INT | DSC_RBUF_UF_INT |
1834 DSC_OBUF_UF_INT;
1835 tegra_dc_writel(dc, value, DC_CMD_INT_TYPE);
1836
1837 value = DSC_TO_UF_INT | DSC_BBUF_UF_INT | DSC_RBUF_UF_INT |
1838 DSC_OBUF_UF_INT | SD3_BUCKET_WALK_DONE_INT |
1839 HEAD_UF_INT | MSF_INT | REG_TMOUT_INT |
1840 REGION_CRC_INT | V_PULSE2_INT | V_PULSE3_INT |
1841 VBLANK_INT | FRAME_END_INT;
1842 tegra_dc_writel(dc, value, DC_CMD_INT_POLARITY);
1843
1844 value = SD3_BUCKET_WALK_DONE_INT | HEAD_UF_INT | VBLANK_INT |
1845 FRAME_END_INT;
1846 tegra_dc_writel(dc, value, DC_CMD_INT_ENABLE);
1847
1848 value = HEAD_UF_INT | REG_TMOUT_INT | FRAME_END_INT;
1849 tegra_dc_writel(dc, value, DC_CMD_INT_MASK);
1850
1851 tegra_dc_writel(dc, READ_MUX, DC_CMD_STATE_ACCESS);
1852 } else {
1853 value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT |
1854 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT;
1855 tegra_dc_writel(dc, value, DC_CMD_INT_TYPE);
1856
1857 value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT |
1858 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT;
1859 tegra_dc_writel(dc, value, DC_CMD_INT_POLARITY);
1860
1861 /* initialize timer */
1862 value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(0x20) |
1863 WINDOW_B_THRESHOLD(0x20) | WINDOW_C_THRESHOLD(0x20);
1864 tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY);
1865
1866 value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(1) |
1867 WINDOW_B_THRESHOLD(1) | WINDOW_C_THRESHOLD(1);
1868 tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY_TIMER);
1869
1870 value = VBLANK_INT | WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT |
1871 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT;
1872 tegra_dc_writel(dc, value, DC_CMD_INT_ENABLE);
1873
1874 value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT |
1875 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT;
1876 tegra_dc_writel(dc, value, DC_CMD_INT_MASK);
1877 }
1878
1879 if (dc->soc->supports_background_color)
1880 tegra_dc_writel(dc, 0, DC_DISP_BLEND_BACKGROUND_COLOR);
1881 else
1882 tegra_dc_writel(dc, 0, DC_DISP_BORDER_COLOR);
1883
1884 /* apply PLL and pixel clock changes */
1885 tegra_dc_commit_state(dc, state);
1886
1887 /* program display mode */
1888 tegra_dc_set_timings(dc, mode);
1889
1890 /* interlacing isn't supported yet, so disable it */
1891 if (dc->soc->supports_interlacing) {
1892 value = tegra_dc_readl(dc, DC_DISP_INTERLACE_CONTROL);
1893 value &= ~INTERLACE_ENABLE;
1894 tegra_dc_writel(dc, value, DC_DISP_INTERLACE_CONTROL);
1895 }
1896
1897 value = tegra_dc_readl(dc, DC_CMD_DISPLAY_COMMAND);
1898 value &= ~DISP_CTRL_MODE_MASK;
1899 value |= DISP_CTRL_MODE_C_DISPLAY;
1900 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_COMMAND);
1901
1902 if (!dc->soc->has_nvdisplay) {
1903 value = tegra_dc_readl(dc, DC_CMD_DISPLAY_POWER_CONTROL);
1904 value |= PW0_ENABLE | PW1_ENABLE | PW2_ENABLE | PW3_ENABLE |
1905 PW4_ENABLE | PM0_ENABLE | PM1_ENABLE;
1906 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_POWER_CONTROL);
1907 }
1908
1909 /* enable underflow reporting and display red for missing pixels */
1910 if (dc->soc->has_nvdisplay) {
1911 value = UNDERFLOW_MODE_RED | UNDERFLOW_REPORT_ENABLE;
1912 tegra_dc_writel(dc, value, DC_COM_RG_UNDERFLOW);
1913 }
1914
1915 tegra_dc_commit(dc);
1916
1917 drm_crtc_vblank_on(crtc);
1918}
1919
1920static void tegra_crtc_atomic_begin(struct drm_crtc *crtc,
1921 struct drm_crtc_state *old_crtc_state)
1922{
1923 unsigned long flags;
1924
1925 if (crtc->state->event) {
1926 spin_lock_irqsave(&crtc->dev->event_lock, flags);
1927
1928 if (drm_crtc_vblank_get(crtc) != 0)
1929 drm_crtc_send_vblank_event(crtc, crtc->state->event);
1930 else
1931 drm_crtc_arm_vblank_event(crtc, crtc->state->event);
1932
1933 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
1934
1935 crtc->state->event = NULL;
1936 }
1937}
1938
1939static void tegra_crtc_atomic_flush(struct drm_crtc *crtc,
1940 struct drm_crtc_state *old_crtc_state)
1941{
1942 struct tegra_dc_state *state = to_dc_state(crtc->state);
1943 struct tegra_dc *dc = to_tegra_dc(crtc);
1944 u32 value;
1945
1946 value = state->planes << 8 | GENERAL_UPDATE;
1947 tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL);
1948 value = tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
1949
1950 value = state->planes | GENERAL_ACT_REQ;
1951 tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL);
1952 value = tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
1953}
1954
1955static const struct drm_crtc_helper_funcs tegra_crtc_helper_funcs = {
1956 .atomic_begin = tegra_crtc_atomic_begin,
1957 .atomic_flush = tegra_crtc_atomic_flush,
1958 .atomic_enable = tegra_crtc_atomic_enable,
1959 .atomic_disable = tegra_crtc_atomic_disable,
1960};
1961
1962static irqreturn_t tegra_dc_irq(int irq, void *data)
1963{
1964 struct tegra_dc *dc = data;
1965 unsigned long status;
1966
1967 status = tegra_dc_readl(dc, DC_CMD_INT_STATUS);
1968 tegra_dc_writel(dc, status, DC_CMD_INT_STATUS);
1969
1970 if (status & FRAME_END_INT) {
1971 /*
1972 dev_dbg(dc->dev, "%s(): frame end\n", __func__);
1973 */
1974 dc->stats.frames++;
1975 }
1976
1977 if (status & VBLANK_INT) {
1978 /*
1979 dev_dbg(dc->dev, "%s(): vertical blank\n", __func__);
1980 */
1981 drm_crtc_handle_vblank(&dc->base);
1982 dc->stats.vblank++;
1983 }
1984
1985 if (status & (WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT)) {
1986 /*
1987 dev_dbg(dc->dev, "%s(): underflow\n", __func__);
1988 */
1989 dc->stats.underflow++;
1990 }
1991
1992 if (status & (WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT)) {
1993 /*
1994 dev_dbg(dc->dev, "%s(): overflow\n", __func__);
1995 */
1996 dc->stats.overflow++;
1997 }
1998
1999 if (status & HEAD_UF_INT) {
2000 dev_dbg_ratelimited(dc->dev, "%s(): head underflow\n", __func__);
2001 dc->stats.underflow++;
2002 }
2003
2004 return IRQ_HANDLED;
2005}
2006
2007static bool tegra_dc_has_window_groups(struct tegra_dc *dc)
2008{
2009 unsigned int i;
2010
2011 if (!dc->soc->wgrps)
2012 return true;
2013
2014 for (i = 0; i < dc->soc->num_wgrps; i++) {
2015 const struct tegra_windowgroup_soc *wgrp = &dc->soc->wgrps[i];
2016
2017 if (wgrp->dc == dc->pipe && wgrp->num_windows > 0)
2018 return true;
2019 }
2020
2021 return false;
2022}
2023
2024static int tegra_dc_init(struct host1x_client *client)
2025{
2026 struct drm_device *drm = dev_get_drvdata(client->host);
2027 unsigned long flags = HOST1X_SYNCPT_CLIENT_MANAGED;
2028 struct tegra_dc *dc = host1x_client_to_dc(client);
2029 struct tegra_drm *tegra = drm->dev_private;
2030 struct drm_plane *primary = NULL;
2031 struct drm_plane *cursor = NULL;
2032 int err;
2033
2034 /*
2035 * XXX do not register DCs with no window groups because we cannot
2036 * assign a primary plane to them, which in turn will cause KMS to
2037 * crash.
2038 */
2039 if (!tegra_dc_has_window_groups(dc))
2040 return 0;
2041
2042 /*
2043 * Set the display hub as the host1x client parent for the display
2044 * controller. This is needed for the runtime reference counting that
2045 * ensures the display hub is always powered when any of the display
2046 * controllers are.
2047 */
2048 if (dc->soc->has_nvdisplay)
2049 client->parent = &tegra->hub->client;
2050
2051 dc->syncpt = host1x_syncpt_request(client, flags);
2052 if (!dc->syncpt)
2053 dev_warn(dc->dev, "failed to allocate syncpoint\n");
2054
2055 err = host1x_client_iommu_attach(client);
2056 if (err < 0 && err != -ENODEV) {
2057 dev_err(client->dev, "failed to attach to domain: %d\n", err);
2058 return err;
2059 }
2060
2061 if (dc->soc->wgrps)
2062 primary = tegra_dc_add_shared_planes(drm, dc);
2063 else
2064 primary = tegra_dc_add_planes(drm, dc);
2065
2066 if (IS_ERR(primary)) {
2067 err = PTR_ERR(primary);
2068 goto cleanup;
2069 }
2070
2071 if (dc->soc->supports_cursor) {
2072 cursor = tegra_dc_cursor_plane_create(drm, dc);
2073 if (IS_ERR(cursor)) {
2074 err = PTR_ERR(cursor);
2075 goto cleanup;
2076 }
2077 } else {
2078 /* dedicate one overlay to mouse cursor */
2079 cursor = tegra_dc_overlay_plane_create(drm, dc, 2, true);
2080 if (IS_ERR(cursor)) {
2081 err = PTR_ERR(cursor);
2082 goto cleanup;
2083 }
2084 }
2085
2086 err = drm_crtc_init_with_planes(drm, &dc->base, primary, cursor,
2087 &tegra_crtc_funcs, NULL);
2088 if (err < 0)
2089 goto cleanup;
2090
2091 drm_crtc_helper_add(&dc->base, &tegra_crtc_helper_funcs);
2092
2093 /*
2094 * Keep track of the minimum pitch alignment across all display
2095 * controllers.
2096 */
2097 if (dc->soc->pitch_align > tegra->pitch_align)
2098 tegra->pitch_align = dc->soc->pitch_align;
2099
2100 err = tegra_dc_rgb_init(drm, dc);
2101 if (err < 0 && err != -ENODEV) {
2102 dev_err(dc->dev, "failed to initialize RGB output: %d\n", err);
2103 goto cleanup;
2104 }
2105
2106 err = devm_request_irq(dc->dev, dc->irq, tegra_dc_irq, 0,
2107 dev_name(dc->dev), dc);
2108 if (err < 0) {
2109 dev_err(dc->dev, "failed to request IRQ#%u: %d\n", dc->irq,
2110 err);
2111 goto cleanup;
2112 }
2113
2114 /*
2115 * Inherit the DMA parameters (such as maximum segment size) from the
2116 * parent host1x device.
2117 */
2118 client->dev->dma_parms = client->host->dma_parms;
2119
2120 return 0;
2121
2122cleanup:
2123 if (!IS_ERR_OR_NULL(cursor))
2124 drm_plane_cleanup(cursor);
2125
2126 if (!IS_ERR(primary))
2127 drm_plane_cleanup(primary);
2128
2129 host1x_client_iommu_detach(client);
2130 host1x_syncpt_free(dc->syncpt);
2131
2132 return err;
2133}
2134
2135static int tegra_dc_exit(struct host1x_client *client)
2136{
2137 struct tegra_dc *dc = host1x_client_to_dc(client);
2138 int err;
2139
2140 if (!tegra_dc_has_window_groups(dc))
2141 return 0;
2142
2143 /* avoid a dangling pointer just in case this disappears */
2144 client->dev->dma_parms = NULL;
2145
2146 devm_free_irq(dc->dev, dc->irq, dc);
2147
2148 err = tegra_dc_rgb_exit(dc);
2149 if (err) {
2150 dev_err(dc->dev, "failed to shutdown RGB output: %d\n", err);
2151 return err;
2152 }
2153
2154 host1x_client_iommu_detach(client);
2155 host1x_syncpt_free(dc->syncpt);
2156
2157 return 0;
2158}
2159
2160static int tegra_dc_runtime_suspend(struct host1x_client *client)
2161{
2162 struct tegra_dc *dc = host1x_client_to_dc(client);
2163 struct device *dev = client->dev;
2164 int err;
2165
2166 err = reset_control_assert(dc->rst);
2167 if (err < 0) {
2168 dev_err(dev, "failed to assert reset: %d\n", err);
2169 return err;
2170 }
2171
2172 if (dc->soc->has_powergate)
2173 tegra_powergate_power_off(dc->powergate);
2174
2175 clk_disable_unprepare(dc->clk);
2176 pm_runtime_put_sync(dev);
2177
2178 return 0;
2179}
2180
2181static int tegra_dc_runtime_resume(struct host1x_client *client)
2182{
2183 struct tegra_dc *dc = host1x_client_to_dc(client);
2184 struct device *dev = client->dev;
2185 int err;
2186
2187 err = pm_runtime_get_sync(dev);
2188 if (err < 0) {
2189 dev_err(dev, "failed to get runtime PM: %d\n", err);
2190 return err;
2191 }
2192
2193 if (dc->soc->has_powergate) {
2194 err = tegra_powergate_sequence_power_up(dc->powergate, dc->clk,
2195 dc->rst);
2196 if (err < 0) {
2197 dev_err(dev, "failed to power partition: %d\n", err);
2198 goto put_rpm;
2199 }
2200 } else {
2201 err = clk_prepare_enable(dc->clk);
2202 if (err < 0) {
2203 dev_err(dev, "failed to enable clock: %d\n", err);
2204 goto put_rpm;
2205 }
2206
2207 err = reset_control_deassert(dc->rst);
2208 if (err < 0) {
2209 dev_err(dev, "failed to deassert reset: %d\n", err);
2210 goto disable_clk;
2211 }
2212 }
2213
2214 return 0;
2215
2216disable_clk:
2217 clk_disable_unprepare(dc->clk);
2218put_rpm:
2219 pm_runtime_put_sync(dev);
2220 return err;
2221}
2222
2223static const struct host1x_client_ops dc_client_ops = {
2224 .init = tegra_dc_init,
2225 .exit = tegra_dc_exit,
2226 .suspend = tegra_dc_runtime_suspend,
2227 .resume = tegra_dc_runtime_resume,
2228};
2229
2230static const struct tegra_dc_soc_info tegra20_dc_soc_info = {
2231 .supports_background_color = false,
2232 .supports_interlacing = false,
2233 .supports_cursor = false,
2234 .supports_block_linear = false,
2235 .has_legacy_blending = true,
2236 .pitch_align = 8,
2237 .has_powergate = false,
2238 .coupled_pm = true,
2239 .has_nvdisplay = false,
2240 .num_primary_formats = ARRAY_SIZE(tegra20_primary_formats),
2241 .primary_formats = tegra20_primary_formats,
2242 .num_overlay_formats = ARRAY_SIZE(tegra20_overlay_formats),
2243 .overlay_formats = tegra20_overlay_formats,
2244 .modifiers = tegra20_modifiers,
2245 .has_win_a_without_filters = true,
2246 .has_win_c_without_vert_filter = true,
2247};
2248
2249static const struct tegra_dc_soc_info tegra30_dc_soc_info = {
2250 .supports_background_color = false,
2251 .supports_interlacing = false,
2252 .supports_cursor = false,
2253 .supports_block_linear = false,
2254 .has_legacy_blending = true,
2255 .pitch_align = 8,
2256 .has_powergate = false,
2257 .coupled_pm = false,
2258 .has_nvdisplay = false,
2259 .num_primary_formats = ARRAY_SIZE(tegra20_primary_formats),
2260 .primary_formats = tegra20_primary_formats,
2261 .num_overlay_formats = ARRAY_SIZE(tegra20_overlay_formats),
2262 .overlay_formats = tegra20_overlay_formats,
2263 .modifiers = tegra20_modifiers,
2264 .has_win_a_without_filters = false,
2265 .has_win_c_without_vert_filter = false,
2266};
2267
2268static const struct tegra_dc_soc_info tegra114_dc_soc_info = {
2269 .supports_background_color = false,
2270 .supports_interlacing = false,
2271 .supports_cursor = false,
2272 .supports_block_linear = false,
2273 .has_legacy_blending = true,
2274 .pitch_align = 64,
2275 .has_powergate = true,
2276 .coupled_pm = false,
2277 .has_nvdisplay = false,
2278 .num_primary_formats = ARRAY_SIZE(tegra114_primary_formats),
2279 .primary_formats = tegra114_primary_formats,
2280 .num_overlay_formats = ARRAY_SIZE(tegra114_overlay_formats),
2281 .overlay_formats = tegra114_overlay_formats,
2282 .modifiers = tegra20_modifiers,
2283 .has_win_a_without_filters = false,
2284 .has_win_c_without_vert_filter = false,
2285};
2286
2287static const struct tegra_dc_soc_info tegra124_dc_soc_info = {
2288 .supports_background_color = true,
2289 .supports_interlacing = true,
2290 .supports_cursor = true,
2291 .supports_block_linear = true,
2292 .has_legacy_blending = false,
2293 .pitch_align = 64,
2294 .has_powergate = true,
2295 .coupled_pm = false,
2296 .has_nvdisplay = false,
2297 .num_primary_formats = ARRAY_SIZE(tegra124_primary_formats),
2298 .primary_formats = tegra124_primary_formats,
2299 .num_overlay_formats = ARRAY_SIZE(tegra124_overlay_formats),
2300 .overlay_formats = tegra124_overlay_formats,
2301 .modifiers = tegra124_modifiers,
2302 .has_win_a_without_filters = false,
2303 .has_win_c_without_vert_filter = false,
2304};
2305
2306static const struct tegra_dc_soc_info tegra210_dc_soc_info = {
2307 .supports_background_color = true,
2308 .supports_interlacing = true,
2309 .supports_cursor = true,
2310 .supports_block_linear = true,
2311 .has_legacy_blending = false,
2312 .pitch_align = 64,
2313 .has_powergate = true,
2314 .coupled_pm = false,
2315 .has_nvdisplay = false,
2316 .num_primary_formats = ARRAY_SIZE(tegra114_primary_formats),
2317 .primary_formats = tegra114_primary_formats,
2318 .num_overlay_formats = ARRAY_SIZE(tegra114_overlay_formats),
2319 .overlay_formats = tegra114_overlay_formats,
2320 .modifiers = tegra124_modifiers,
2321 .has_win_a_without_filters = false,
2322 .has_win_c_without_vert_filter = false,
2323};
2324
2325static const struct tegra_windowgroup_soc tegra186_dc_wgrps[] = {
2326 {
2327 .index = 0,
2328 .dc = 0,
2329 .windows = (const unsigned int[]) { 0 },
2330 .num_windows = 1,
2331 }, {
2332 .index = 1,
2333 .dc = 1,
2334 .windows = (const unsigned int[]) { 1 },
2335 .num_windows = 1,
2336 }, {
2337 .index = 2,
2338 .dc = 1,
2339 .windows = (const unsigned int[]) { 2 },
2340 .num_windows = 1,
2341 }, {
2342 .index = 3,
2343 .dc = 2,
2344 .windows = (const unsigned int[]) { 3 },
2345 .num_windows = 1,
2346 }, {
2347 .index = 4,
2348 .dc = 2,
2349 .windows = (const unsigned int[]) { 4 },
2350 .num_windows = 1,
2351 }, {
2352 .index = 5,
2353 .dc = 2,
2354 .windows = (const unsigned int[]) { 5 },
2355 .num_windows = 1,
2356 },
2357};
2358
2359static const struct tegra_dc_soc_info tegra186_dc_soc_info = {
2360 .supports_background_color = true,
2361 .supports_interlacing = true,
2362 .supports_cursor = true,
2363 .supports_block_linear = true,
2364 .has_legacy_blending = false,
2365 .pitch_align = 64,
2366 .has_powergate = false,
2367 .coupled_pm = false,
2368 .has_nvdisplay = true,
2369 .wgrps = tegra186_dc_wgrps,
2370 .num_wgrps = ARRAY_SIZE(tegra186_dc_wgrps),
2371};
2372
2373static const struct tegra_windowgroup_soc tegra194_dc_wgrps[] = {
2374 {
2375 .index = 0,
2376 .dc = 0,
2377 .windows = (const unsigned int[]) { 0 },
2378 .num_windows = 1,
2379 }, {
2380 .index = 1,
2381 .dc = 1,
2382 .windows = (const unsigned int[]) { 1 },
2383 .num_windows = 1,
2384 }, {
2385 .index = 2,
2386 .dc = 1,
2387 .windows = (const unsigned int[]) { 2 },
2388 .num_windows = 1,
2389 }, {
2390 .index = 3,
2391 .dc = 2,
2392 .windows = (const unsigned int[]) { 3 },
2393 .num_windows = 1,
2394 }, {
2395 .index = 4,
2396 .dc = 2,
2397 .windows = (const unsigned int[]) { 4 },
2398 .num_windows = 1,
2399 }, {
2400 .index = 5,
2401 .dc = 2,
2402 .windows = (const unsigned int[]) { 5 },
2403 .num_windows = 1,
2404 },
2405};
2406
2407static const struct tegra_dc_soc_info tegra194_dc_soc_info = {
2408 .supports_background_color = true,
2409 .supports_interlacing = true,
2410 .supports_cursor = true,
2411 .supports_block_linear = true,
2412 .has_legacy_blending = false,
2413 .pitch_align = 64,
2414 .has_powergate = false,
2415 .coupled_pm = false,
2416 .has_nvdisplay = true,
2417 .wgrps = tegra194_dc_wgrps,
2418 .num_wgrps = ARRAY_SIZE(tegra194_dc_wgrps),
2419};
2420
2421static const struct of_device_id tegra_dc_of_match[] = {
2422 {
2423 .compatible = "nvidia,tegra194-dc",
2424 .data = &tegra194_dc_soc_info,
2425 }, {
2426 .compatible = "nvidia,tegra186-dc",
2427 .data = &tegra186_dc_soc_info,
2428 }, {
2429 .compatible = "nvidia,tegra210-dc",
2430 .data = &tegra210_dc_soc_info,
2431 }, {
2432 .compatible = "nvidia,tegra124-dc",
2433 .data = &tegra124_dc_soc_info,
2434 }, {
2435 .compatible = "nvidia,tegra114-dc",
2436 .data = &tegra114_dc_soc_info,
2437 }, {
2438 .compatible = "nvidia,tegra30-dc",
2439 .data = &tegra30_dc_soc_info,
2440 }, {
2441 .compatible = "nvidia,tegra20-dc",
2442 .data = &tegra20_dc_soc_info,
2443 }, {
2444 /* sentinel */
2445 }
2446};
2447MODULE_DEVICE_TABLE(of, tegra_dc_of_match);
2448
2449static int tegra_dc_parse_dt(struct tegra_dc *dc)
2450{
2451 struct device_node *np;
2452 u32 value = 0;
2453 int err;
2454
2455 err = of_property_read_u32(dc->dev->of_node, "nvidia,head", &value);
2456 if (err < 0) {
2457 dev_err(dc->dev, "missing \"nvidia,head\" property\n");
2458
2459 /*
2460 * If the nvidia,head property isn't present, try to find the
2461 * correct head number by looking up the position of this
2462 * display controller's node within the device tree. Assuming
2463 * that the nodes are ordered properly in the DTS file and
2464 * that the translation into a flattened device tree blob
2465 * preserves that ordering this will actually yield the right
2466 * head number.
2467 *
2468 * If those assumptions don't hold, this will still work for
2469 * cases where only a single display controller is used.
2470 */
2471 for_each_matching_node(np, tegra_dc_of_match) {
2472 if (np == dc->dev->of_node) {
2473 of_node_put(np);
2474 break;
2475 }
2476
2477 value++;
2478 }
2479 }
2480
2481 dc->pipe = value;
2482
2483 return 0;
2484}
2485
2486static int tegra_dc_match_by_pipe(struct device *dev, const void *data)
2487{
2488 struct tegra_dc *dc = dev_get_drvdata(dev);
2489 unsigned int pipe = (unsigned long)(void *)data;
2490
2491 return dc->pipe == pipe;
2492}
2493
2494static int tegra_dc_couple(struct tegra_dc *dc)
2495{
2496 /*
2497 * On Tegra20, DC1 requires DC0 to be taken out of reset in order to
2498 * be enabled, otherwise CPU hangs on writing to CMD_DISPLAY_COMMAND /
2499 * POWER_CONTROL registers during CRTC enabling.
2500 */
2501 if (dc->soc->coupled_pm && dc->pipe == 1) {
2502 u32 flags = DL_FLAG_PM_RUNTIME | DL_FLAG_AUTOREMOVE_CONSUMER;
2503 struct device_link *link;
2504 struct device *partner;
2505
2506 partner = driver_find_device(dc->dev->driver, NULL, NULL,
2507 tegra_dc_match_by_pipe);
2508 if (!partner)
2509 return -EPROBE_DEFER;
2510
2511 link = device_link_add(dc->dev, partner, flags);
2512 if (!link) {
2513 dev_err(dc->dev, "failed to link controllers\n");
2514 return -EINVAL;
2515 }
2516
2517 dev_dbg(dc->dev, "coupled to %s\n", dev_name(partner));
2518 }
2519
2520 return 0;
2521}
2522
2523static int tegra_dc_probe(struct platform_device *pdev)
2524{
2525 struct tegra_dc *dc;
2526 int err;
2527
2528 dc = devm_kzalloc(&pdev->dev, sizeof(*dc), GFP_KERNEL);
2529 if (!dc)
2530 return -ENOMEM;
2531
2532 dc->soc = of_device_get_match_data(&pdev->dev);
2533
2534 INIT_LIST_HEAD(&dc->list);
2535 dc->dev = &pdev->dev;
2536
2537 err = tegra_dc_parse_dt(dc);
2538 if (err < 0)
2539 return err;
2540
2541 err = tegra_dc_couple(dc);
2542 if (err < 0)
2543 return err;
2544
2545 dc->clk = devm_clk_get(&pdev->dev, NULL);
2546 if (IS_ERR(dc->clk)) {
2547 dev_err(&pdev->dev, "failed to get clock\n");
2548 return PTR_ERR(dc->clk);
2549 }
2550
2551 dc->rst = devm_reset_control_get(&pdev->dev, "dc");
2552 if (IS_ERR(dc->rst)) {
2553 dev_err(&pdev->dev, "failed to get reset\n");
2554 return PTR_ERR(dc->rst);
2555 }
2556
2557 /* assert reset and disable clock */
2558 err = clk_prepare_enable(dc->clk);
2559 if (err < 0)
2560 return err;
2561
2562 usleep_range(2000, 4000);
2563
2564 err = reset_control_assert(dc->rst);
2565 if (err < 0)
2566 return err;
2567
2568 usleep_range(2000, 4000);
2569
2570 clk_disable_unprepare(dc->clk);
2571
2572 if (dc->soc->has_powergate) {
2573 if (dc->pipe == 0)
2574 dc->powergate = TEGRA_POWERGATE_DIS;
2575 else
2576 dc->powergate = TEGRA_POWERGATE_DISB;
2577
2578 tegra_powergate_power_off(dc->powergate);
2579 }
2580
2581 dc->regs = devm_platform_ioremap_resource(pdev, 0);
2582 if (IS_ERR(dc->regs))
2583 return PTR_ERR(dc->regs);
2584
2585 dc->irq = platform_get_irq(pdev, 0);
2586 if (dc->irq < 0)
2587 return -ENXIO;
2588
2589 err = tegra_dc_rgb_probe(dc);
2590 if (err < 0 && err != -ENODEV) {
2591 const char *level = KERN_ERR;
2592
2593 if (err == -EPROBE_DEFER)
2594 level = KERN_DEBUG;
2595
2596 dev_printk(level, dc->dev, "failed to probe RGB output: %d\n",
2597 err);
2598 return err;
2599 }
2600
2601 platform_set_drvdata(pdev, dc);
2602 pm_runtime_enable(&pdev->dev);
2603
2604 INIT_LIST_HEAD(&dc->client.list);
2605 dc->client.ops = &dc_client_ops;
2606 dc->client.dev = &pdev->dev;
2607
2608 err = host1x_client_register(&dc->client);
2609 if (err < 0) {
2610 dev_err(&pdev->dev, "failed to register host1x client: %d\n",
2611 err);
2612 goto disable_pm;
2613 }
2614
2615 return 0;
2616
2617disable_pm:
2618 pm_runtime_disable(&pdev->dev);
2619 tegra_dc_rgb_remove(dc);
2620
2621 return err;
2622}
2623
2624static int tegra_dc_remove(struct platform_device *pdev)
2625{
2626 struct tegra_dc *dc = platform_get_drvdata(pdev);
2627 int err;
2628
2629 err = host1x_client_unregister(&dc->client);
2630 if (err < 0) {
2631 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
2632 err);
2633 return err;
2634 }
2635
2636 err = tegra_dc_rgb_remove(dc);
2637 if (err < 0) {
2638 dev_err(&pdev->dev, "failed to remove RGB output: %d\n", err);
2639 return err;
2640 }
2641
2642 pm_runtime_disable(&pdev->dev);
2643
2644 return 0;
2645}
2646
2647struct platform_driver tegra_dc_driver = {
2648 .driver = {
2649 .name = "tegra-dc",
2650 .of_match_table = tegra_dc_of_match,
2651 },
2652 .probe = tegra_dc_probe,
2653 .remove = tegra_dc_remove,
2654};