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1/*
2 * Copyright (C) 2012 Avionic Design GmbH
3 * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
9
10#include <linux/clk.h>
11#include <linux/debugfs.h>
12#include <linux/reset.h>
13
14#include "dc.h"
15#include "drm.h"
16#include "gem.h"
17
18struct tegra_dc_soc_info {
19 bool supports_interlacing;
20};
21
22struct tegra_plane {
23 struct drm_plane base;
24 unsigned int index;
25};
26
27static inline struct tegra_plane *to_tegra_plane(struct drm_plane *plane)
28{
29 return container_of(plane, struct tegra_plane, base);
30}
31
32static int tegra_plane_update(struct drm_plane *plane, struct drm_crtc *crtc,
33 struct drm_framebuffer *fb, int crtc_x,
34 int crtc_y, unsigned int crtc_w,
35 unsigned int crtc_h, uint32_t src_x,
36 uint32_t src_y, uint32_t src_w, uint32_t src_h)
37{
38 struct tegra_plane *p = to_tegra_plane(plane);
39 struct tegra_dc *dc = to_tegra_dc(crtc);
40 struct tegra_dc_window window;
41 unsigned int i;
42
43 memset(&window, 0, sizeof(window));
44 window.src.x = src_x >> 16;
45 window.src.y = src_y >> 16;
46 window.src.w = src_w >> 16;
47 window.src.h = src_h >> 16;
48 window.dst.x = crtc_x;
49 window.dst.y = crtc_y;
50 window.dst.w = crtc_w;
51 window.dst.h = crtc_h;
52 window.format = tegra_dc_format(fb->pixel_format);
53 window.bits_per_pixel = fb->bits_per_pixel;
54 window.bottom_up = tegra_fb_is_bottom_up(fb);
55 window.tiled = tegra_fb_is_tiled(fb);
56
57 for (i = 0; i < drm_format_num_planes(fb->pixel_format); i++) {
58 struct tegra_bo *bo = tegra_fb_get_plane(fb, i);
59
60 window.base[i] = bo->paddr + fb->offsets[i];
61
62 /*
63 * Tegra doesn't support different strides for U and V planes
64 * so we display a warning if the user tries to display a
65 * framebuffer with such a configuration.
66 */
67 if (i >= 2) {
68 if (fb->pitches[i] != window.stride[1])
69 DRM_ERROR("unsupported UV-plane configuration\n");
70 } else {
71 window.stride[i] = fb->pitches[i];
72 }
73 }
74
75 return tegra_dc_setup_window(dc, p->index, &window);
76}
77
78static int tegra_plane_disable(struct drm_plane *plane)
79{
80 struct tegra_dc *dc = to_tegra_dc(plane->crtc);
81 struct tegra_plane *p = to_tegra_plane(plane);
82 unsigned long value;
83
84 if (!plane->crtc)
85 return 0;
86
87 value = WINDOW_A_SELECT << p->index;
88 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_WINDOW_HEADER);
89
90 value = tegra_dc_readl(dc, DC_WIN_WIN_OPTIONS);
91 value &= ~WIN_ENABLE;
92 tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS);
93
94 tegra_dc_writel(dc, WIN_A_UPDATE << p->index, DC_CMD_STATE_CONTROL);
95 tegra_dc_writel(dc, WIN_A_ACT_REQ << p->index, DC_CMD_STATE_CONTROL);
96
97 return 0;
98}
99
100static void tegra_plane_destroy(struct drm_plane *plane)
101{
102 struct tegra_plane *p = to_tegra_plane(plane);
103
104 tegra_plane_disable(plane);
105 drm_plane_cleanup(plane);
106 kfree(p);
107}
108
109static const struct drm_plane_funcs tegra_plane_funcs = {
110 .update_plane = tegra_plane_update,
111 .disable_plane = tegra_plane_disable,
112 .destroy = tegra_plane_destroy,
113};
114
115static const uint32_t plane_formats[] = {
116 DRM_FORMAT_XBGR8888,
117 DRM_FORMAT_XRGB8888,
118 DRM_FORMAT_RGB565,
119 DRM_FORMAT_UYVY,
120 DRM_FORMAT_YUV420,
121 DRM_FORMAT_YUV422,
122};
123
124static int tegra_dc_add_planes(struct drm_device *drm, struct tegra_dc *dc)
125{
126 unsigned int i;
127 int err = 0;
128
129 for (i = 0; i < 2; i++) {
130 struct tegra_plane *plane;
131
132 plane = kzalloc(sizeof(*plane), GFP_KERNEL);
133 if (!plane)
134 return -ENOMEM;
135
136 plane->index = 1 + i;
137
138 err = drm_plane_init(drm, &plane->base, 1 << dc->pipe,
139 &tegra_plane_funcs, plane_formats,
140 ARRAY_SIZE(plane_formats), false);
141 if (err < 0) {
142 kfree(plane);
143 return err;
144 }
145 }
146
147 return 0;
148}
149
150static int tegra_dc_set_base(struct tegra_dc *dc, int x, int y,
151 struct drm_framebuffer *fb)
152{
153 unsigned int format = tegra_dc_format(fb->pixel_format);
154 struct tegra_bo *bo = tegra_fb_get_plane(fb, 0);
155 unsigned int h_offset = 0, v_offset = 0;
156 unsigned long value;
157
158 tegra_dc_writel(dc, WINDOW_A_SELECT, DC_CMD_DISPLAY_WINDOW_HEADER);
159
160 value = fb->offsets[0] + y * fb->pitches[0] +
161 x * fb->bits_per_pixel / 8;
162
163 tegra_dc_writel(dc, bo->paddr + value, DC_WINBUF_START_ADDR);
164 tegra_dc_writel(dc, fb->pitches[0], DC_WIN_LINE_STRIDE);
165 tegra_dc_writel(dc, format, DC_WIN_COLOR_DEPTH);
166
167 if (tegra_fb_is_tiled(fb)) {
168 value = DC_WIN_BUFFER_ADDR_MODE_TILE_UV |
169 DC_WIN_BUFFER_ADDR_MODE_TILE;
170 } else {
171 value = DC_WIN_BUFFER_ADDR_MODE_LINEAR_UV |
172 DC_WIN_BUFFER_ADDR_MODE_LINEAR;
173 }
174
175 tegra_dc_writel(dc, value, DC_WIN_BUFFER_ADDR_MODE);
176
177 /* make sure bottom-up buffers are properly displayed */
178 if (tegra_fb_is_bottom_up(fb)) {
179 value = tegra_dc_readl(dc, DC_WIN_WIN_OPTIONS);
180 value |= INVERT_V;
181 tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS);
182
183 v_offset += fb->height - 1;
184 } else {
185 value = tegra_dc_readl(dc, DC_WIN_WIN_OPTIONS);
186 value &= ~INVERT_V;
187 tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS);
188 }
189
190 tegra_dc_writel(dc, h_offset, DC_WINBUF_ADDR_H_OFFSET);
191 tegra_dc_writel(dc, v_offset, DC_WINBUF_ADDR_V_OFFSET);
192
193 value = GENERAL_UPDATE | WIN_A_UPDATE;
194 tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL);
195
196 value = GENERAL_ACT_REQ | WIN_A_ACT_REQ;
197 tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL);
198
199 return 0;
200}
201
202void tegra_dc_enable_vblank(struct tegra_dc *dc)
203{
204 unsigned long value, flags;
205
206 spin_lock_irqsave(&dc->lock, flags);
207
208 value = tegra_dc_readl(dc, DC_CMD_INT_MASK);
209 value |= VBLANK_INT;
210 tegra_dc_writel(dc, value, DC_CMD_INT_MASK);
211
212 spin_unlock_irqrestore(&dc->lock, flags);
213}
214
215void tegra_dc_disable_vblank(struct tegra_dc *dc)
216{
217 unsigned long value, flags;
218
219 spin_lock_irqsave(&dc->lock, flags);
220
221 value = tegra_dc_readl(dc, DC_CMD_INT_MASK);
222 value &= ~VBLANK_INT;
223 tegra_dc_writel(dc, value, DC_CMD_INT_MASK);
224
225 spin_unlock_irqrestore(&dc->lock, flags);
226}
227
228static void tegra_dc_finish_page_flip(struct tegra_dc *dc)
229{
230 struct drm_device *drm = dc->base.dev;
231 struct drm_crtc *crtc = &dc->base;
232 unsigned long flags, base;
233 struct tegra_bo *bo;
234
235 if (!dc->event)
236 return;
237
238 bo = tegra_fb_get_plane(crtc->primary->fb, 0);
239
240 /* check if new start address has been latched */
241 tegra_dc_writel(dc, READ_MUX, DC_CMD_STATE_ACCESS);
242 base = tegra_dc_readl(dc, DC_WINBUF_START_ADDR);
243 tegra_dc_writel(dc, 0, DC_CMD_STATE_ACCESS);
244
245 if (base == bo->paddr + crtc->primary->fb->offsets[0]) {
246 spin_lock_irqsave(&drm->event_lock, flags);
247 drm_send_vblank_event(drm, dc->pipe, dc->event);
248 drm_vblank_put(drm, dc->pipe);
249 dc->event = NULL;
250 spin_unlock_irqrestore(&drm->event_lock, flags);
251 }
252}
253
254void tegra_dc_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file)
255{
256 struct tegra_dc *dc = to_tegra_dc(crtc);
257 struct drm_device *drm = crtc->dev;
258 unsigned long flags;
259
260 spin_lock_irqsave(&drm->event_lock, flags);
261
262 if (dc->event && dc->event->base.file_priv == file) {
263 dc->event->base.destroy(&dc->event->base);
264 drm_vblank_put(drm, dc->pipe);
265 dc->event = NULL;
266 }
267
268 spin_unlock_irqrestore(&drm->event_lock, flags);
269}
270
271static int tegra_dc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb,
272 struct drm_pending_vblank_event *event, uint32_t page_flip_flags)
273{
274 struct tegra_dc *dc = to_tegra_dc(crtc);
275 struct drm_device *drm = crtc->dev;
276
277 if (dc->event)
278 return -EBUSY;
279
280 if (event) {
281 event->pipe = dc->pipe;
282 dc->event = event;
283 drm_vblank_get(drm, dc->pipe);
284 }
285
286 tegra_dc_set_base(dc, 0, 0, fb);
287 crtc->primary->fb = fb;
288
289 return 0;
290}
291
292static void drm_crtc_clear(struct drm_crtc *crtc)
293{
294 memset(crtc, 0, sizeof(*crtc));
295}
296
297static void tegra_dc_destroy(struct drm_crtc *crtc)
298{
299 drm_crtc_cleanup(crtc);
300 drm_crtc_clear(crtc);
301}
302
303static const struct drm_crtc_funcs tegra_crtc_funcs = {
304 .page_flip = tegra_dc_page_flip,
305 .set_config = drm_crtc_helper_set_config,
306 .destroy = tegra_dc_destroy,
307};
308
309static void tegra_crtc_disable(struct drm_crtc *crtc)
310{
311 struct tegra_dc *dc = to_tegra_dc(crtc);
312 struct drm_device *drm = crtc->dev;
313 struct drm_plane *plane;
314
315 drm_for_each_legacy_plane(plane, &drm->mode_config.plane_list) {
316 if (plane->crtc == crtc) {
317 tegra_plane_disable(plane);
318 plane->crtc = NULL;
319
320 if (plane->fb) {
321 drm_framebuffer_unreference(plane->fb);
322 plane->fb = NULL;
323 }
324 }
325 }
326
327 drm_vblank_off(drm, dc->pipe);
328}
329
330static bool tegra_crtc_mode_fixup(struct drm_crtc *crtc,
331 const struct drm_display_mode *mode,
332 struct drm_display_mode *adjusted)
333{
334 return true;
335}
336
337static inline u32 compute_dda_inc(unsigned int in, unsigned int out, bool v,
338 unsigned int bpp)
339{
340 fixed20_12 outf = dfixed_init(out);
341 fixed20_12 inf = dfixed_init(in);
342 u32 dda_inc;
343 int max;
344
345 if (v)
346 max = 15;
347 else {
348 switch (bpp) {
349 case 2:
350 max = 8;
351 break;
352
353 default:
354 WARN_ON_ONCE(1);
355 /* fallthrough */
356 case 4:
357 max = 4;
358 break;
359 }
360 }
361
362 outf.full = max_t(u32, outf.full - dfixed_const(1), dfixed_const(1));
363 inf.full -= dfixed_const(1);
364
365 dda_inc = dfixed_div(inf, outf);
366 dda_inc = min_t(u32, dda_inc, dfixed_const(max));
367
368 return dda_inc;
369}
370
371static inline u32 compute_initial_dda(unsigned int in)
372{
373 fixed20_12 inf = dfixed_init(in);
374 return dfixed_frac(inf);
375}
376
377static int tegra_dc_set_timings(struct tegra_dc *dc,
378 struct drm_display_mode *mode)
379{
380 /* TODO: For HDMI compliance, h & v ref_to_sync should be set to 1 */
381 unsigned int h_ref_to_sync = 0;
382 unsigned int v_ref_to_sync = 0;
383 unsigned long value;
384
385 tegra_dc_writel(dc, 0x0, DC_DISP_DISP_TIMING_OPTIONS);
386
387 value = (v_ref_to_sync << 16) | h_ref_to_sync;
388 tegra_dc_writel(dc, value, DC_DISP_REF_TO_SYNC);
389
390 value = ((mode->vsync_end - mode->vsync_start) << 16) |
391 ((mode->hsync_end - mode->hsync_start) << 0);
392 tegra_dc_writel(dc, value, DC_DISP_SYNC_WIDTH);
393
394 value = ((mode->vtotal - mode->vsync_end) << 16) |
395 ((mode->htotal - mode->hsync_end) << 0);
396 tegra_dc_writel(dc, value, DC_DISP_BACK_PORCH);
397
398 value = ((mode->vsync_start - mode->vdisplay) << 16) |
399 ((mode->hsync_start - mode->hdisplay) << 0);
400 tegra_dc_writel(dc, value, DC_DISP_FRONT_PORCH);
401
402 value = (mode->vdisplay << 16) | mode->hdisplay;
403 tegra_dc_writel(dc, value, DC_DISP_ACTIVE);
404
405 return 0;
406}
407
408static int tegra_crtc_setup_clk(struct drm_crtc *crtc,
409 struct drm_display_mode *mode,
410 unsigned long *div)
411{
412 unsigned long pclk = mode->clock * 1000, rate;
413 struct tegra_dc *dc = to_tegra_dc(crtc);
414 struct tegra_output *output = NULL;
415 struct drm_encoder *encoder;
416 long err;
417
418 list_for_each_entry(encoder, &crtc->dev->mode_config.encoder_list, head)
419 if (encoder->crtc == crtc) {
420 output = encoder_to_output(encoder);
421 break;
422 }
423
424 if (!output)
425 return -ENODEV;
426
427 /*
428 * This assumes that the display controller will divide its parent
429 * clock by 2 to generate the pixel clock.
430 */
431 err = tegra_output_setup_clock(output, dc->clk, pclk * 2);
432 if (err < 0) {
433 dev_err(dc->dev, "failed to setup clock: %ld\n", err);
434 return err;
435 }
436
437 rate = clk_get_rate(dc->clk);
438 *div = (rate * 2 / pclk) - 2;
439
440 DRM_DEBUG_KMS("rate: %lu, div: %lu\n", rate, *div);
441
442 return 0;
443}
444
445static bool tegra_dc_format_is_yuv(unsigned int format, bool *planar)
446{
447 switch (format) {
448 case WIN_COLOR_DEPTH_YCbCr422:
449 case WIN_COLOR_DEPTH_YUV422:
450 if (planar)
451 *planar = false;
452
453 return true;
454
455 case WIN_COLOR_DEPTH_YCbCr420P:
456 case WIN_COLOR_DEPTH_YUV420P:
457 case WIN_COLOR_DEPTH_YCbCr422P:
458 case WIN_COLOR_DEPTH_YUV422P:
459 case WIN_COLOR_DEPTH_YCbCr422R:
460 case WIN_COLOR_DEPTH_YUV422R:
461 case WIN_COLOR_DEPTH_YCbCr422RA:
462 case WIN_COLOR_DEPTH_YUV422RA:
463 if (planar)
464 *planar = true;
465
466 return true;
467 }
468
469 return false;
470}
471
472int tegra_dc_setup_window(struct tegra_dc *dc, unsigned int index,
473 const struct tegra_dc_window *window)
474{
475 unsigned h_offset, v_offset, h_size, v_size, h_dda, v_dda, bpp;
476 unsigned long value;
477 bool yuv, planar;
478
479 /*
480 * For YUV planar modes, the number of bytes per pixel takes into
481 * account only the luma component and therefore is 1.
482 */
483 yuv = tegra_dc_format_is_yuv(window->format, &planar);
484 if (!yuv)
485 bpp = window->bits_per_pixel / 8;
486 else
487 bpp = planar ? 1 : 2;
488
489 value = WINDOW_A_SELECT << index;
490 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_WINDOW_HEADER);
491
492 tegra_dc_writel(dc, window->format, DC_WIN_COLOR_DEPTH);
493 tegra_dc_writel(dc, 0, DC_WIN_BYTE_SWAP);
494
495 value = V_POSITION(window->dst.y) | H_POSITION(window->dst.x);
496 tegra_dc_writel(dc, value, DC_WIN_POSITION);
497
498 value = V_SIZE(window->dst.h) | H_SIZE(window->dst.w);
499 tegra_dc_writel(dc, value, DC_WIN_SIZE);
500
501 h_offset = window->src.x * bpp;
502 v_offset = window->src.y;
503 h_size = window->src.w * bpp;
504 v_size = window->src.h;
505
506 value = V_PRESCALED_SIZE(v_size) | H_PRESCALED_SIZE(h_size);
507 tegra_dc_writel(dc, value, DC_WIN_PRESCALED_SIZE);
508
509 /*
510 * For DDA computations the number of bytes per pixel for YUV planar
511 * modes needs to take into account all Y, U and V components.
512 */
513 if (yuv && planar)
514 bpp = 2;
515
516 h_dda = compute_dda_inc(window->src.w, window->dst.w, false, bpp);
517 v_dda = compute_dda_inc(window->src.h, window->dst.h, true, bpp);
518
519 value = V_DDA_INC(v_dda) | H_DDA_INC(h_dda);
520 tegra_dc_writel(dc, value, DC_WIN_DDA_INC);
521
522 h_dda = compute_initial_dda(window->src.x);
523 v_dda = compute_initial_dda(window->src.y);
524
525 tegra_dc_writel(dc, h_dda, DC_WIN_H_INITIAL_DDA);
526 tegra_dc_writel(dc, v_dda, DC_WIN_V_INITIAL_DDA);
527
528 tegra_dc_writel(dc, 0, DC_WIN_UV_BUF_STRIDE);
529 tegra_dc_writel(dc, 0, DC_WIN_BUF_STRIDE);
530
531 tegra_dc_writel(dc, window->base[0], DC_WINBUF_START_ADDR);
532
533 if (yuv && planar) {
534 tegra_dc_writel(dc, window->base[1], DC_WINBUF_START_ADDR_U);
535 tegra_dc_writel(dc, window->base[2], DC_WINBUF_START_ADDR_V);
536 value = window->stride[1] << 16 | window->stride[0];
537 tegra_dc_writel(dc, value, DC_WIN_LINE_STRIDE);
538 } else {
539 tegra_dc_writel(dc, window->stride[0], DC_WIN_LINE_STRIDE);
540 }
541
542 if (window->bottom_up)
543 v_offset += window->src.h - 1;
544
545 tegra_dc_writel(dc, h_offset, DC_WINBUF_ADDR_H_OFFSET);
546 tegra_dc_writel(dc, v_offset, DC_WINBUF_ADDR_V_OFFSET);
547
548 if (window->tiled) {
549 value = DC_WIN_BUFFER_ADDR_MODE_TILE_UV |
550 DC_WIN_BUFFER_ADDR_MODE_TILE;
551 } else {
552 value = DC_WIN_BUFFER_ADDR_MODE_LINEAR_UV |
553 DC_WIN_BUFFER_ADDR_MODE_LINEAR;
554 }
555
556 tegra_dc_writel(dc, value, DC_WIN_BUFFER_ADDR_MODE);
557
558 value = WIN_ENABLE;
559
560 if (yuv) {
561 /* setup default colorspace conversion coefficients */
562 tegra_dc_writel(dc, 0x00f0, DC_WIN_CSC_YOF);
563 tegra_dc_writel(dc, 0x012a, DC_WIN_CSC_KYRGB);
564 tegra_dc_writel(dc, 0x0000, DC_WIN_CSC_KUR);
565 tegra_dc_writel(dc, 0x0198, DC_WIN_CSC_KVR);
566 tegra_dc_writel(dc, 0x039b, DC_WIN_CSC_KUG);
567 tegra_dc_writel(dc, 0x032f, DC_WIN_CSC_KVG);
568 tegra_dc_writel(dc, 0x0204, DC_WIN_CSC_KUB);
569 tegra_dc_writel(dc, 0x0000, DC_WIN_CSC_KVB);
570
571 value |= CSC_ENABLE;
572 } else if (window->bits_per_pixel < 24) {
573 value |= COLOR_EXPAND;
574 }
575
576 if (window->bottom_up)
577 value |= INVERT_V;
578
579 tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS);
580
581 /*
582 * Disable blending and assume Window A is the bottom-most window,
583 * Window C is the top-most window and Window B is in the middle.
584 */
585 tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_NOKEY);
586 tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_1WIN);
587
588 switch (index) {
589 case 0:
590 tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_2WIN_X);
591 tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_2WIN_Y);
592 tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_3WIN_XY);
593 break;
594
595 case 1:
596 tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_2WIN_X);
597 tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_2WIN_Y);
598 tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_3WIN_XY);
599 break;
600
601 case 2:
602 tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_2WIN_X);
603 tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_2WIN_Y);
604 tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_3WIN_XY);
605 break;
606 }
607
608 tegra_dc_writel(dc, WIN_A_UPDATE << index, DC_CMD_STATE_CONTROL);
609 tegra_dc_writel(dc, WIN_A_ACT_REQ << index, DC_CMD_STATE_CONTROL);
610
611 return 0;
612}
613
614unsigned int tegra_dc_format(uint32_t format)
615{
616 switch (format) {
617 case DRM_FORMAT_XBGR8888:
618 return WIN_COLOR_DEPTH_R8G8B8A8;
619
620 case DRM_FORMAT_XRGB8888:
621 return WIN_COLOR_DEPTH_B8G8R8A8;
622
623 case DRM_FORMAT_RGB565:
624 return WIN_COLOR_DEPTH_B5G6R5;
625
626 case DRM_FORMAT_UYVY:
627 return WIN_COLOR_DEPTH_YCbCr422;
628
629 case DRM_FORMAT_YUV420:
630 return WIN_COLOR_DEPTH_YCbCr420P;
631
632 case DRM_FORMAT_YUV422:
633 return WIN_COLOR_DEPTH_YCbCr422P;
634
635 default:
636 break;
637 }
638
639 WARN(1, "unsupported pixel format %u, using default\n", format);
640 return WIN_COLOR_DEPTH_B8G8R8A8;
641}
642
643static int tegra_crtc_mode_set(struct drm_crtc *crtc,
644 struct drm_display_mode *mode,
645 struct drm_display_mode *adjusted,
646 int x, int y, struct drm_framebuffer *old_fb)
647{
648 struct tegra_bo *bo = tegra_fb_get_plane(crtc->primary->fb, 0);
649 struct tegra_dc *dc = to_tegra_dc(crtc);
650 struct tegra_dc_window window;
651 unsigned long div, value;
652 int err;
653
654 drm_vblank_pre_modeset(crtc->dev, dc->pipe);
655
656 err = tegra_crtc_setup_clk(crtc, mode, &div);
657 if (err) {
658 dev_err(dc->dev, "failed to setup clock for CRTC: %d\n", err);
659 return err;
660 }
661
662 /* program display mode */
663 tegra_dc_set_timings(dc, mode);
664
665 /* interlacing isn't supported yet, so disable it */
666 if (dc->soc->supports_interlacing) {
667 value = tegra_dc_readl(dc, DC_DISP_INTERLACE_CONTROL);
668 value &= ~INTERLACE_ENABLE;
669 tegra_dc_writel(dc, value, DC_DISP_INTERLACE_CONTROL);
670 }
671
672 value = SHIFT_CLK_DIVIDER(div) | PIXEL_CLK_DIVIDER_PCD1;
673 tegra_dc_writel(dc, value, DC_DISP_DISP_CLOCK_CONTROL);
674
675 /* setup window parameters */
676 memset(&window, 0, sizeof(window));
677 window.src.x = 0;
678 window.src.y = 0;
679 window.src.w = mode->hdisplay;
680 window.src.h = mode->vdisplay;
681 window.dst.x = 0;
682 window.dst.y = 0;
683 window.dst.w = mode->hdisplay;
684 window.dst.h = mode->vdisplay;
685 window.format = tegra_dc_format(crtc->primary->fb->pixel_format);
686 window.bits_per_pixel = crtc->primary->fb->bits_per_pixel;
687 window.stride[0] = crtc->primary->fb->pitches[0];
688 window.base[0] = bo->paddr;
689
690 err = tegra_dc_setup_window(dc, 0, &window);
691 if (err < 0)
692 dev_err(dc->dev, "failed to enable root plane\n");
693
694 return 0;
695}
696
697static int tegra_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
698 struct drm_framebuffer *old_fb)
699{
700 struct tegra_dc *dc = to_tegra_dc(crtc);
701
702 return tegra_dc_set_base(dc, x, y, crtc->primary->fb);
703}
704
705static void tegra_crtc_prepare(struct drm_crtc *crtc)
706{
707 struct tegra_dc *dc = to_tegra_dc(crtc);
708 unsigned int syncpt;
709 unsigned long value;
710
711 /* hardware initialization */
712 reset_control_deassert(dc->rst);
713 usleep_range(10000, 20000);
714
715 if (dc->pipe)
716 syncpt = SYNCPT_VBLANK1;
717 else
718 syncpt = SYNCPT_VBLANK0;
719
720 /* initialize display controller */
721 tegra_dc_writel(dc, 0x00000100, DC_CMD_GENERAL_INCR_SYNCPT_CNTRL);
722 tegra_dc_writel(dc, 0x100 | syncpt, DC_CMD_CONT_SYNCPT_VSYNC);
723
724 value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT | WIN_A_OF_INT;
725 tegra_dc_writel(dc, value, DC_CMD_INT_TYPE);
726
727 value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT |
728 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT;
729 tegra_dc_writel(dc, value, DC_CMD_INT_POLARITY);
730
731 value = PW0_ENABLE | PW1_ENABLE | PW2_ENABLE | PW3_ENABLE |
732 PW4_ENABLE | PM0_ENABLE | PM1_ENABLE;
733 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_POWER_CONTROL);
734
735 /* initialize timer */
736 value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(0x20) |
737 WINDOW_B_THRESHOLD(0x20) | WINDOW_C_THRESHOLD(0x20);
738 tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY);
739
740 value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(1) |
741 WINDOW_B_THRESHOLD(1) | WINDOW_C_THRESHOLD(1);
742 tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY_TIMER);
743
744 value = VBLANK_INT | WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT;
745 tegra_dc_writel(dc, value, DC_CMD_INT_ENABLE);
746
747 value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT;
748 tegra_dc_writel(dc, value, DC_CMD_INT_MASK);
749}
750
751static void tegra_crtc_commit(struct drm_crtc *crtc)
752{
753 struct tegra_dc *dc = to_tegra_dc(crtc);
754 unsigned long value;
755
756 value = GENERAL_UPDATE | WIN_A_UPDATE;
757 tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL);
758
759 value = GENERAL_ACT_REQ | WIN_A_ACT_REQ;
760 tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL);
761
762 drm_vblank_post_modeset(crtc->dev, dc->pipe);
763}
764
765static void tegra_crtc_load_lut(struct drm_crtc *crtc)
766{
767}
768
769static const struct drm_crtc_helper_funcs tegra_crtc_helper_funcs = {
770 .disable = tegra_crtc_disable,
771 .mode_fixup = tegra_crtc_mode_fixup,
772 .mode_set = tegra_crtc_mode_set,
773 .mode_set_base = tegra_crtc_mode_set_base,
774 .prepare = tegra_crtc_prepare,
775 .commit = tegra_crtc_commit,
776 .load_lut = tegra_crtc_load_lut,
777};
778
779static irqreturn_t tegra_dc_irq(int irq, void *data)
780{
781 struct tegra_dc *dc = data;
782 unsigned long status;
783
784 status = tegra_dc_readl(dc, DC_CMD_INT_STATUS);
785 tegra_dc_writel(dc, status, DC_CMD_INT_STATUS);
786
787 if (status & FRAME_END_INT) {
788 /*
789 dev_dbg(dc->dev, "%s(): frame end\n", __func__);
790 */
791 }
792
793 if (status & VBLANK_INT) {
794 /*
795 dev_dbg(dc->dev, "%s(): vertical blank\n", __func__);
796 */
797 drm_handle_vblank(dc->base.dev, dc->pipe);
798 tegra_dc_finish_page_flip(dc);
799 }
800
801 if (status & (WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT)) {
802 /*
803 dev_dbg(dc->dev, "%s(): underflow\n", __func__);
804 */
805 }
806
807 return IRQ_HANDLED;
808}
809
810static int tegra_dc_show_regs(struct seq_file *s, void *data)
811{
812 struct drm_info_node *node = s->private;
813 struct tegra_dc *dc = node->info_ent->data;
814
815#define DUMP_REG(name) \
816 seq_printf(s, "%-40s %#05x %08lx\n", #name, name, \
817 tegra_dc_readl(dc, name))
818
819 DUMP_REG(DC_CMD_GENERAL_INCR_SYNCPT);
820 DUMP_REG(DC_CMD_GENERAL_INCR_SYNCPT_CNTRL);
821 DUMP_REG(DC_CMD_GENERAL_INCR_SYNCPT_ERROR);
822 DUMP_REG(DC_CMD_WIN_A_INCR_SYNCPT);
823 DUMP_REG(DC_CMD_WIN_A_INCR_SYNCPT_CNTRL);
824 DUMP_REG(DC_CMD_WIN_A_INCR_SYNCPT_ERROR);
825 DUMP_REG(DC_CMD_WIN_B_INCR_SYNCPT);
826 DUMP_REG(DC_CMD_WIN_B_INCR_SYNCPT_CNTRL);
827 DUMP_REG(DC_CMD_WIN_B_INCR_SYNCPT_ERROR);
828 DUMP_REG(DC_CMD_WIN_C_INCR_SYNCPT);
829 DUMP_REG(DC_CMD_WIN_C_INCR_SYNCPT_CNTRL);
830 DUMP_REG(DC_CMD_WIN_C_INCR_SYNCPT_ERROR);
831 DUMP_REG(DC_CMD_CONT_SYNCPT_VSYNC);
832 DUMP_REG(DC_CMD_DISPLAY_COMMAND_OPTION0);
833 DUMP_REG(DC_CMD_DISPLAY_COMMAND);
834 DUMP_REG(DC_CMD_SIGNAL_RAISE);
835 DUMP_REG(DC_CMD_DISPLAY_POWER_CONTROL);
836 DUMP_REG(DC_CMD_INT_STATUS);
837 DUMP_REG(DC_CMD_INT_MASK);
838 DUMP_REG(DC_CMD_INT_ENABLE);
839 DUMP_REG(DC_CMD_INT_TYPE);
840 DUMP_REG(DC_CMD_INT_POLARITY);
841 DUMP_REG(DC_CMD_SIGNAL_RAISE1);
842 DUMP_REG(DC_CMD_SIGNAL_RAISE2);
843 DUMP_REG(DC_CMD_SIGNAL_RAISE3);
844 DUMP_REG(DC_CMD_STATE_ACCESS);
845 DUMP_REG(DC_CMD_STATE_CONTROL);
846 DUMP_REG(DC_CMD_DISPLAY_WINDOW_HEADER);
847 DUMP_REG(DC_CMD_REG_ACT_CONTROL);
848 DUMP_REG(DC_COM_CRC_CONTROL);
849 DUMP_REG(DC_COM_CRC_CHECKSUM);
850 DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(0));
851 DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(1));
852 DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(2));
853 DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(3));
854 DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(0));
855 DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(1));
856 DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(2));
857 DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(3));
858 DUMP_REG(DC_COM_PIN_OUTPUT_DATA(0));
859 DUMP_REG(DC_COM_PIN_OUTPUT_DATA(1));
860 DUMP_REG(DC_COM_PIN_OUTPUT_DATA(2));
861 DUMP_REG(DC_COM_PIN_OUTPUT_DATA(3));
862 DUMP_REG(DC_COM_PIN_INPUT_ENABLE(0));
863 DUMP_REG(DC_COM_PIN_INPUT_ENABLE(1));
864 DUMP_REG(DC_COM_PIN_INPUT_ENABLE(2));
865 DUMP_REG(DC_COM_PIN_INPUT_ENABLE(3));
866 DUMP_REG(DC_COM_PIN_INPUT_DATA(0));
867 DUMP_REG(DC_COM_PIN_INPUT_DATA(1));
868 DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(0));
869 DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(1));
870 DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(2));
871 DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(3));
872 DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(4));
873 DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(5));
874 DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(6));
875 DUMP_REG(DC_COM_PIN_MISC_CONTROL);
876 DUMP_REG(DC_COM_PIN_PM0_CONTROL);
877 DUMP_REG(DC_COM_PIN_PM0_DUTY_CYCLE);
878 DUMP_REG(DC_COM_PIN_PM1_CONTROL);
879 DUMP_REG(DC_COM_PIN_PM1_DUTY_CYCLE);
880 DUMP_REG(DC_COM_SPI_CONTROL);
881 DUMP_REG(DC_COM_SPI_START_BYTE);
882 DUMP_REG(DC_COM_HSPI_WRITE_DATA_AB);
883 DUMP_REG(DC_COM_HSPI_WRITE_DATA_CD);
884 DUMP_REG(DC_COM_HSPI_CS_DC);
885 DUMP_REG(DC_COM_SCRATCH_REGISTER_A);
886 DUMP_REG(DC_COM_SCRATCH_REGISTER_B);
887 DUMP_REG(DC_COM_GPIO_CTRL);
888 DUMP_REG(DC_COM_GPIO_DEBOUNCE_COUNTER);
889 DUMP_REG(DC_COM_CRC_CHECKSUM_LATCHED);
890 DUMP_REG(DC_DISP_DISP_SIGNAL_OPTIONS0);
891 DUMP_REG(DC_DISP_DISP_SIGNAL_OPTIONS1);
892 DUMP_REG(DC_DISP_DISP_WIN_OPTIONS);
893 DUMP_REG(DC_DISP_DISP_MEM_HIGH_PRIORITY);
894 DUMP_REG(DC_DISP_DISP_MEM_HIGH_PRIORITY_TIMER);
895 DUMP_REG(DC_DISP_DISP_TIMING_OPTIONS);
896 DUMP_REG(DC_DISP_REF_TO_SYNC);
897 DUMP_REG(DC_DISP_SYNC_WIDTH);
898 DUMP_REG(DC_DISP_BACK_PORCH);
899 DUMP_REG(DC_DISP_ACTIVE);
900 DUMP_REG(DC_DISP_FRONT_PORCH);
901 DUMP_REG(DC_DISP_H_PULSE0_CONTROL);
902 DUMP_REG(DC_DISP_H_PULSE0_POSITION_A);
903 DUMP_REG(DC_DISP_H_PULSE0_POSITION_B);
904 DUMP_REG(DC_DISP_H_PULSE0_POSITION_C);
905 DUMP_REG(DC_DISP_H_PULSE0_POSITION_D);
906 DUMP_REG(DC_DISP_H_PULSE1_CONTROL);
907 DUMP_REG(DC_DISP_H_PULSE1_POSITION_A);
908 DUMP_REG(DC_DISP_H_PULSE1_POSITION_B);
909 DUMP_REG(DC_DISP_H_PULSE1_POSITION_C);
910 DUMP_REG(DC_DISP_H_PULSE1_POSITION_D);
911 DUMP_REG(DC_DISP_H_PULSE2_CONTROL);
912 DUMP_REG(DC_DISP_H_PULSE2_POSITION_A);
913 DUMP_REG(DC_DISP_H_PULSE2_POSITION_B);
914 DUMP_REG(DC_DISP_H_PULSE2_POSITION_C);
915 DUMP_REG(DC_DISP_H_PULSE2_POSITION_D);
916 DUMP_REG(DC_DISP_V_PULSE0_CONTROL);
917 DUMP_REG(DC_DISP_V_PULSE0_POSITION_A);
918 DUMP_REG(DC_DISP_V_PULSE0_POSITION_B);
919 DUMP_REG(DC_DISP_V_PULSE0_POSITION_C);
920 DUMP_REG(DC_DISP_V_PULSE1_CONTROL);
921 DUMP_REG(DC_DISP_V_PULSE1_POSITION_A);
922 DUMP_REG(DC_DISP_V_PULSE1_POSITION_B);
923 DUMP_REG(DC_DISP_V_PULSE1_POSITION_C);
924 DUMP_REG(DC_DISP_V_PULSE2_CONTROL);
925 DUMP_REG(DC_DISP_V_PULSE2_POSITION_A);
926 DUMP_REG(DC_DISP_V_PULSE3_CONTROL);
927 DUMP_REG(DC_DISP_V_PULSE3_POSITION_A);
928 DUMP_REG(DC_DISP_M0_CONTROL);
929 DUMP_REG(DC_DISP_M1_CONTROL);
930 DUMP_REG(DC_DISP_DI_CONTROL);
931 DUMP_REG(DC_DISP_PP_CONTROL);
932 DUMP_REG(DC_DISP_PP_SELECT_A);
933 DUMP_REG(DC_DISP_PP_SELECT_B);
934 DUMP_REG(DC_DISP_PP_SELECT_C);
935 DUMP_REG(DC_DISP_PP_SELECT_D);
936 DUMP_REG(DC_DISP_DISP_CLOCK_CONTROL);
937 DUMP_REG(DC_DISP_DISP_INTERFACE_CONTROL);
938 DUMP_REG(DC_DISP_DISP_COLOR_CONTROL);
939 DUMP_REG(DC_DISP_SHIFT_CLOCK_OPTIONS);
940 DUMP_REG(DC_DISP_DATA_ENABLE_OPTIONS);
941 DUMP_REG(DC_DISP_SERIAL_INTERFACE_OPTIONS);
942 DUMP_REG(DC_DISP_LCD_SPI_OPTIONS);
943 DUMP_REG(DC_DISP_BORDER_COLOR);
944 DUMP_REG(DC_DISP_COLOR_KEY0_LOWER);
945 DUMP_REG(DC_DISP_COLOR_KEY0_UPPER);
946 DUMP_REG(DC_DISP_COLOR_KEY1_LOWER);
947 DUMP_REG(DC_DISP_COLOR_KEY1_UPPER);
948 DUMP_REG(DC_DISP_CURSOR_FOREGROUND);
949 DUMP_REG(DC_DISP_CURSOR_BACKGROUND);
950 DUMP_REG(DC_DISP_CURSOR_START_ADDR);
951 DUMP_REG(DC_DISP_CURSOR_START_ADDR_NS);
952 DUMP_REG(DC_DISP_CURSOR_POSITION);
953 DUMP_REG(DC_DISP_CURSOR_POSITION_NS);
954 DUMP_REG(DC_DISP_INIT_SEQ_CONTROL);
955 DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_A);
956 DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_B);
957 DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_C);
958 DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_D);
959 DUMP_REG(DC_DISP_DC_MCCIF_FIFOCTRL);
960 DUMP_REG(DC_DISP_MCCIF_DISPLAY0A_HYST);
961 DUMP_REG(DC_DISP_MCCIF_DISPLAY0B_HYST);
962 DUMP_REG(DC_DISP_MCCIF_DISPLAY1A_HYST);
963 DUMP_REG(DC_DISP_MCCIF_DISPLAY1B_HYST);
964 DUMP_REG(DC_DISP_DAC_CRT_CTRL);
965 DUMP_REG(DC_DISP_DISP_MISC_CONTROL);
966 DUMP_REG(DC_DISP_SD_CONTROL);
967 DUMP_REG(DC_DISP_SD_CSC_COEFF);
968 DUMP_REG(DC_DISP_SD_LUT(0));
969 DUMP_REG(DC_DISP_SD_LUT(1));
970 DUMP_REG(DC_DISP_SD_LUT(2));
971 DUMP_REG(DC_DISP_SD_LUT(3));
972 DUMP_REG(DC_DISP_SD_LUT(4));
973 DUMP_REG(DC_DISP_SD_LUT(5));
974 DUMP_REG(DC_DISP_SD_LUT(6));
975 DUMP_REG(DC_DISP_SD_LUT(7));
976 DUMP_REG(DC_DISP_SD_LUT(8));
977 DUMP_REG(DC_DISP_SD_FLICKER_CONTROL);
978 DUMP_REG(DC_DISP_DC_PIXEL_COUNT);
979 DUMP_REG(DC_DISP_SD_HISTOGRAM(0));
980 DUMP_REG(DC_DISP_SD_HISTOGRAM(1));
981 DUMP_REG(DC_DISP_SD_HISTOGRAM(2));
982 DUMP_REG(DC_DISP_SD_HISTOGRAM(3));
983 DUMP_REG(DC_DISP_SD_HISTOGRAM(4));
984 DUMP_REG(DC_DISP_SD_HISTOGRAM(5));
985 DUMP_REG(DC_DISP_SD_HISTOGRAM(6));
986 DUMP_REG(DC_DISP_SD_HISTOGRAM(7));
987 DUMP_REG(DC_DISP_SD_BL_TF(0));
988 DUMP_REG(DC_DISP_SD_BL_TF(1));
989 DUMP_REG(DC_DISP_SD_BL_TF(2));
990 DUMP_REG(DC_DISP_SD_BL_TF(3));
991 DUMP_REG(DC_DISP_SD_BL_CONTROL);
992 DUMP_REG(DC_DISP_SD_HW_K_VALUES);
993 DUMP_REG(DC_DISP_SD_MAN_K_VALUES);
994 DUMP_REG(DC_WIN_WIN_OPTIONS);
995 DUMP_REG(DC_WIN_BYTE_SWAP);
996 DUMP_REG(DC_WIN_BUFFER_CONTROL);
997 DUMP_REG(DC_WIN_COLOR_DEPTH);
998 DUMP_REG(DC_WIN_POSITION);
999 DUMP_REG(DC_WIN_SIZE);
1000 DUMP_REG(DC_WIN_PRESCALED_SIZE);
1001 DUMP_REG(DC_WIN_H_INITIAL_DDA);
1002 DUMP_REG(DC_WIN_V_INITIAL_DDA);
1003 DUMP_REG(DC_WIN_DDA_INC);
1004 DUMP_REG(DC_WIN_LINE_STRIDE);
1005 DUMP_REG(DC_WIN_BUF_STRIDE);
1006 DUMP_REG(DC_WIN_UV_BUF_STRIDE);
1007 DUMP_REG(DC_WIN_BUFFER_ADDR_MODE);
1008 DUMP_REG(DC_WIN_DV_CONTROL);
1009 DUMP_REG(DC_WIN_BLEND_NOKEY);
1010 DUMP_REG(DC_WIN_BLEND_1WIN);
1011 DUMP_REG(DC_WIN_BLEND_2WIN_X);
1012 DUMP_REG(DC_WIN_BLEND_2WIN_Y);
1013 DUMP_REG(DC_WIN_BLEND_3WIN_XY);
1014 DUMP_REG(DC_WIN_HP_FETCH_CONTROL);
1015 DUMP_REG(DC_WINBUF_START_ADDR);
1016 DUMP_REG(DC_WINBUF_START_ADDR_NS);
1017 DUMP_REG(DC_WINBUF_START_ADDR_U);
1018 DUMP_REG(DC_WINBUF_START_ADDR_U_NS);
1019 DUMP_REG(DC_WINBUF_START_ADDR_V);
1020 DUMP_REG(DC_WINBUF_START_ADDR_V_NS);
1021 DUMP_REG(DC_WINBUF_ADDR_H_OFFSET);
1022 DUMP_REG(DC_WINBUF_ADDR_H_OFFSET_NS);
1023 DUMP_REG(DC_WINBUF_ADDR_V_OFFSET);
1024 DUMP_REG(DC_WINBUF_ADDR_V_OFFSET_NS);
1025 DUMP_REG(DC_WINBUF_UFLOW_STATUS);
1026 DUMP_REG(DC_WINBUF_AD_UFLOW_STATUS);
1027 DUMP_REG(DC_WINBUF_BD_UFLOW_STATUS);
1028 DUMP_REG(DC_WINBUF_CD_UFLOW_STATUS);
1029
1030#undef DUMP_REG
1031
1032 return 0;
1033}
1034
1035static struct drm_info_list debugfs_files[] = {
1036 { "regs", tegra_dc_show_regs, 0, NULL },
1037};
1038
1039static int tegra_dc_debugfs_init(struct tegra_dc *dc, struct drm_minor *minor)
1040{
1041 unsigned int i;
1042 char *name;
1043 int err;
1044
1045 name = kasprintf(GFP_KERNEL, "dc.%d", dc->pipe);
1046 dc->debugfs = debugfs_create_dir(name, minor->debugfs_root);
1047 kfree(name);
1048
1049 if (!dc->debugfs)
1050 return -ENOMEM;
1051
1052 dc->debugfs_files = kmemdup(debugfs_files, sizeof(debugfs_files),
1053 GFP_KERNEL);
1054 if (!dc->debugfs_files) {
1055 err = -ENOMEM;
1056 goto remove;
1057 }
1058
1059 for (i = 0; i < ARRAY_SIZE(debugfs_files); i++)
1060 dc->debugfs_files[i].data = dc;
1061
1062 err = drm_debugfs_create_files(dc->debugfs_files,
1063 ARRAY_SIZE(debugfs_files),
1064 dc->debugfs, minor);
1065 if (err < 0)
1066 goto free;
1067
1068 dc->minor = minor;
1069
1070 return 0;
1071
1072free:
1073 kfree(dc->debugfs_files);
1074 dc->debugfs_files = NULL;
1075remove:
1076 debugfs_remove(dc->debugfs);
1077 dc->debugfs = NULL;
1078
1079 return err;
1080}
1081
1082static int tegra_dc_debugfs_exit(struct tegra_dc *dc)
1083{
1084 drm_debugfs_remove_files(dc->debugfs_files, ARRAY_SIZE(debugfs_files),
1085 dc->minor);
1086 dc->minor = NULL;
1087
1088 kfree(dc->debugfs_files);
1089 dc->debugfs_files = NULL;
1090
1091 debugfs_remove(dc->debugfs);
1092 dc->debugfs = NULL;
1093
1094 return 0;
1095}
1096
1097static int tegra_dc_init(struct host1x_client *client)
1098{
1099 struct tegra_drm *tegra = dev_get_drvdata(client->parent);
1100 struct tegra_dc *dc = host1x_client_to_dc(client);
1101 int err;
1102
1103 drm_crtc_init(tegra->drm, &dc->base, &tegra_crtc_funcs);
1104 drm_mode_crtc_set_gamma_size(&dc->base, 256);
1105 drm_crtc_helper_add(&dc->base, &tegra_crtc_helper_funcs);
1106
1107 err = tegra_dc_rgb_init(tegra->drm, dc);
1108 if (err < 0 && err != -ENODEV) {
1109 dev_err(dc->dev, "failed to initialize RGB output: %d\n", err);
1110 return err;
1111 }
1112
1113 err = tegra_dc_add_planes(tegra->drm, dc);
1114 if (err < 0)
1115 return err;
1116
1117 if (IS_ENABLED(CONFIG_DEBUG_FS)) {
1118 err = tegra_dc_debugfs_init(dc, tegra->drm->primary);
1119 if (err < 0)
1120 dev_err(dc->dev, "debugfs setup failed: %d\n", err);
1121 }
1122
1123 err = devm_request_irq(dc->dev, dc->irq, tegra_dc_irq, 0,
1124 dev_name(dc->dev), dc);
1125 if (err < 0) {
1126 dev_err(dc->dev, "failed to request IRQ#%u: %d\n", dc->irq,
1127 err);
1128 return err;
1129 }
1130
1131 return 0;
1132}
1133
1134static int tegra_dc_exit(struct host1x_client *client)
1135{
1136 struct tegra_dc *dc = host1x_client_to_dc(client);
1137 int err;
1138
1139 devm_free_irq(dc->dev, dc->irq, dc);
1140
1141 if (IS_ENABLED(CONFIG_DEBUG_FS)) {
1142 err = tegra_dc_debugfs_exit(dc);
1143 if (err < 0)
1144 dev_err(dc->dev, "debugfs cleanup failed: %d\n", err);
1145 }
1146
1147 err = tegra_dc_rgb_exit(dc);
1148 if (err) {
1149 dev_err(dc->dev, "failed to shutdown RGB output: %d\n", err);
1150 return err;
1151 }
1152
1153 return 0;
1154}
1155
1156static const struct host1x_client_ops dc_client_ops = {
1157 .init = tegra_dc_init,
1158 .exit = tegra_dc_exit,
1159};
1160
1161static const struct tegra_dc_soc_info tegra20_dc_soc_info = {
1162 .supports_interlacing = false,
1163};
1164
1165static const struct tegra_dc_soc_info tegra30_dc_soc_info = {
1166 .supports_interlacing = false,
1167};
1168
1169static const struct tegra_dc_soc_info tegra124_dc_soc_info = {
1170 .supports_interlacing = true,
1171};
1172
1173static const struct of_device_id tegra_dc_of_match[] = {
1174 {
1175 .compatible = "nvidia,tegra124-dc",
1176 .data = &tegra124_dc_soc_info,
1177 }, {
1178 .compatible = "nvidia,tegra30-dc",
1179 .data = &tegra30_dc_soc_info,
1180 }, {
1181 .compatible = "nvidia,tegra20-dc",
1182 .data = &tegra20_dc_soc_info,
1183 }, {
1184 /* sentinel */
1185 }
1186};
1187
1188static int tegra_dc_parse_dt(struct tegra_dc *dc)
1189{
1190 struct device_node *np;
1191 u32 value = 0;
1192 int err;
1193
1194 err = of_property_read_u32(dc->dev->of_node, "nvidia,head", &value);
1195 if (err < 0) {
1196 dev_err(dc->dev, "missing \"nvidia,head\" property\n");
1197
1198 /*
1199 * If the nvidia,head property isn't present, try to find the
1200 * correct head number by looking up the position of this
1201 * display controller's node within the device tree. Assuming
1202 * that the nodes are ordered properly in the DTS file and
1203 * that the translation into a flattened device tree blob
1204 * preserves that ordering this will actually yield the right
1205 * head number.
1206 *
1207 * If those assumptions don't hold, this will still work for
1208 * cases where only a single display controller is used.
1209 */
1210 for_each_matching_node(np, tegra_dc_of_match) {
1211 if (np == dc->dev->of_node)
1212 break;
1213
1214 value++;
1215 }
1216 }
1217
1218 dc->pipe = value;
1219
1220 return 0;
1221}
1222
1223static int tegra_dc_probe(struct platform_device *pdev)
1224{
1225 const struct of_device_id *id;
1226 struct resource *regs;
1227 struct tegra_dc *dc;
1228 int err;
1229
1230 dc = devm_kzalloc(&pdev->dev, sizeof(*dc), GFP_KERNEL);
1231 if (!dc)
1232 return -ENOMEM;
1233
1234 id = of_match_node(tegra_dc_of_match, pdev->dev.of_node);
1235 if (!id)
1236 return -ENODEV;
1237
1238 spin_lock_init(&dc->lock);
1239 INIT_LIST_HEAD(&dc->list);
1240 dc->dev = &pdev->dev;
1241 dc->soc = id->data;
1242
1243 err = tegra_dc_parse_dt(dc);
1244 if (err < 0)
1245 return err;
1246
1247 dc->clk = devm_clk_get(&pdev->dev, NULL);
1248 if (IS_ERR(dc->clk)) {
1249 dev_err(&pdev->dev, "failed to get clock\n");
1250 return PTR_ERR(dc->clk);
1251 }
1252
1253 dc->rst = devm_reset_control_get(&pdev->dev, "dc");
1254 if (IS_ERR(dc->rst)) {
1255 dev_err(&pdev->dev, "failed to get reset\n");
1256 return PTR_ERR(dc->rst);
1257 }
1258
1259 err = clk_prepare_enable(dc->clk);
1260 if (err < 0)
1261 return err;
1262
1263 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1264 dc->regs = devm_ioremap_resource(&pdev->dev, regs);
1265 if (IS_ERR(dc->regs))
1266 return PTR_ERR(dc->regs);
1267
1268 dc->irq = platform_get_irq(pdev, 0);
1269 if (dc->irq < 0) {
1270 dev_err(&pdev->dev, "failed to get IRQ\n");
1271 return -ENXIO;
1272 }
1273
1274 INIT_LIST_HEAD(&dc->client.list);
1275 dc->client.ops = &dc_client_ops;
1276 dc->client.dev = &pdev->dev;
1277
1278 err = tegra_dc_rgb_probe(dc);
1279 if (err < 0 && err != -ENODEV) {
1280 dev_err(&pdev->dev, "failed to probe RGB output: %d\n", err);
1281 return err;
1282 }
1283
1284 err = host1x_client_register(&dc->client);
1285 if (err < 0) {
1286 dev_err(&pdev->dev, "failed to register host1x client: %d\n",
1287 err);
1288 return err;
1289 }
1290
1291 platform_set_drvdata(pdev, dc);
1292
1293 return 0;
1294}
1295
1296static int tegra_dc_remove(struct platform_device *pdev)
1297{
1298 struct tegra_dc *dc = platform_get_drvdata(pdev);
1299 int err;
1300
1301 err = host1x_client_unregister(&dc->client);
1302 if (err < 0) {
1303 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
1304 err);
1305 return err;
1306 }
1307
1308 err = tegra_dc_rgb_remove(dc);
1309 if (err < 0) {
1310 dev_err(&pdev->dev, "failed to remove RGB output: %d\n", err);
1311 return err;
1312 }
1313
1314 clk_disable_unprepare(dc->clk);
1315
1316 return 0;
1317}
1318
1319struct platform_driver tegra_dc_driver = {
1320 .driver = {
1321 .name = "tegra-dc",
1322 .owner = THIS_MODULE,
1323 .of_match_table = tegra_dc_of_match,
1324 },
1325 .probe = tegra_dc_probe,
1326 .remove = tegra_dc_remove,
1327};