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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2017 NVIDIA CORPORATION. All rights reserved.
4 */
5
6#include <linux/clk.h>
7#include <linux/delay.h>
8#include <linux/host1x.h>
9#include <linux/module.h>
10#include <linux/of.h>
11#include <linux/of_device.h>
12#include <linux/of_graph.h>
13#include <linux/platform_device.h>
14#include <linux/pm_runtime.h>
15#include <linux/reset.h>
16
17#include <drm/drm_atomic.h>
18#include <drm/drm_atomic_helper.h>
19#include <drm/drm_fourcc.h>
20#include <drm/drm_probe_helper.h>
21
22#include "drm.h"
23#include "dc.h"
24#include "plane.h"
25
26#define NFB 24
27
28static const u32 tegra_shared_plane_formats[] = {
29 DRM_FORMAT_ARGB1555,
30 DRM_FORMAT_RGB565,
31 DRM_FORMAT_RGBA5551,
32 DRM_FORMAT_ARGB8888,
33 DRM_FORMAT_ABGR8888,
34 /* new on Tegra114 */
35 DRM_FORMAT_ABGR4444,
36 DRM_FORMAT_ABGR1555,
37 DRM_FORMAT_BGRA5551,
38 DRM_FORMAT_XRGB1555,
39 DRM_FORMAT_RGBX5551,
40 DRM_FORMAT_XBGR1555,
41 DRM_FORMAT_BGRX5551,
42 DRM_FORMAT_BGR565,
43 DRM_FORMAT_XRGB8888,
44 DRM_FORMAT_XBGR8888,
45 /* planar formats */
46 DRM_FORMAT_UYVY,
47 DRM_FORMAT_YUYV,
48 DRM_FORMAT_YUV420,
49 DRM_FORMAT_YUV422,
50};
51
52static const u64 tegra_shared_plane_modifiers[] = {
53 DRM_FORMAT_MOD_LINEAR,
54 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0),
55 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1),
56 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2),
57 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(3),
58 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(4),
59 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(5),
60 /*
61 * The GPU sector layout is only supported on Tegra194, but these will
62 * be filtered out later on by ->format_mod_supported() on SoCs where
63 * it isn't supported.
64 */
65 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0) | DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT,
66 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1) | DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT,
67 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2) | DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT,
68 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(3) | DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT,
69 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(4) | DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT,
70 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(5) | DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT,
71 /* sentinel */
72 DRM_FORMAT_MOD_INVALID
73};
74
75static inline unsigned int tegra_plane_offset(struct tegra_plane *plane,
76 unsigned int offset)
77{
78 if (offset >= 0x500 && offset <= 0x581) {
79 offset = 0x000 + (offset - 0x500);
80 return plane->offset + offset;
81 }
82
83 if (offset >= 0x700 && offset <= 0x73c) {
84 offset = 0x180 + (offset - 0x700);
85 return plane->offset + offset;
86 }
87
88 if (offset >= 0x800 && offset <= 0x83e) {
89 offset = 0x1c0 + (offset - 0x800);
90 return plane->offset + offset;
91 }
92
93 dev_WARN(plane->dc->dev, "invalid offset: %x\n", offset);
94
95 return plane->offset + offset;
96}
97
98static inline u32 tegra_plane_readl(struct tegra_plane *plane,
99 unsigned int offset)
100{
101 return tegra_dc_readl(plane->dc, tegra_plane_offset(plane, offset));
102}
103
104static inline void tegra_plane_writel(struct tegra_plane *plane, u32 value,
105 unsigned int offset)
106{
107 tegra_dc_writel(plane->dc, value, tegra_plane_offset(plane, offset));
108}
109
110static int tegra_windowgroup_enable(struct tegra_windowgroup *wgrp)
111{
112 int err = 0;
113
114 mutex_lock(&wgrp->lock);
115
116 if (wgrp->usecount == 0) {
117 err = host1x_client_resume(wgrp->parent);
118 if (err < 0) {
119 dev_err(wgrp->parent->dev, "failed to resume: %d\n", err);
120 goto unlock;
121 }
122
123 reset_control_deassert(wgrp->rst);
124 }
125
126 wgrp->usecount++;
127
128unlock:
129 mutex_unlock(&wgrp->lock);
130 return err;
131}
132
133static void tegra_windowgroup_disable(struct tegra_windowgroup *wgrp)
134{
135 int err;
136
137 mutex_lock(&wgrp->lock);
138
139 if (wgrp->usecount == 1) {
140 err = reset_control_assert(wgrp->rst);
141 if (err < 0) {
142 pr_err("failed to assert reset for window group %u\n",
143 wgrp->index);
144 }
145
146 host1x_client_suspend(wgrp->parent);
147 }
148
149 wgrp->usecount--;
150 mutex_unlock(&wgrp->lock);
151}
152
153int tegra_display_hub_prepare(struct tegra_display_hub *hub)
154{
155 unsigned int i;
156
157 /*
158 * XXX Enabling/disabling windowgroups needs to happen when the owner
159 * display controller is disabled. There's currently no good point at
160 * which this could be executed, so unconditionally enable all window
161 * groups for now.
162 */
163 for (i = 0; i < hub->soc->num_wgrps; i++) {
164 struct tegra_windowgroup *wgrp = &hub->wgrps[i];
165
166 /* Skip orphaned window group whose parent DC is disabled */
167 if (wgrp->parent)
168 tegra_windowgroup_enable(wgrp);
169 }
170
171 return 0;
172}
173
174void tegra_display_hub_cleanup(struct tegra_display_hub *hub)
175{
176 unsigned int i;
177
178 /*
179 * XXX Remove this once window groups can be more fine-grainedly
180 * enabled and disabled.
181 */
182 for (i = 0; i < hub->soc->num_wgrps; i++) {
183 struct tegra_windowgroup *wgrp = &hub->wgrps[i];
184
185 /* Skip orphaned window group whose parent DC is disabled */
186 if (wgrp->parent)
187 tegra_windowgroup_disable(wgrp);
188 }
189}
190
191static void tegra_shared_plane_update(struct tegra_plane *plane)
192{
193 struct tegra_dc *dc = plane->dc;
194 unsigned long timeout;
195 u32 mask, value;
196
197 mask = COMMON_UPDATE | WIN_A_UPDATE << plane->base.index;
198 tegra_dc_writel(dc, mask, DC_CMD_STATE_CONTROL);
199
200 timeout = jiffies + msecs_to_jiffies(1000);
201
202 while (time_before(jiffies, timeout)) {
203 value = tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
204 if ((value & mask) == 0)
205 break;
206
207 usleep_range(100, 400);
208 }
209}
210
211static void tegra_shared_plane_activate(struct tegra_plane *plane)
212{
213 struct tegra_dc *dc = plane->dc;
214 unsigned long timeout;
215 u32 mask, value;
216
217 mask = COMMON_ACTREQ | WIN_A_ACT_REQ << plane->base.index;
218 tegra_dc_writel(dc, mask, DC_CMD_STATE_CONTROL);
219
220 timeout = jiffies + msecs_to_jiffies(1000);
221
222 while (time_before(jiffies, timeout)) {
223 value = tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
224 if ((value & mask) == 0)
225 break;
226
227 usleep_range(100, 400);
228 }
229}
230
231static unsigned int
232tegra_shared_plane_get_owner(struct tegra_plane *plane, struct tegra_dc *dc)
233{
234 unsigned int offset =
235 tegra_plane_offset(plane, DC_WIN_CORE_WINDOWGROUP_SET_CONTROL);
236
237 return tegra_dc_readl(dc, offset) & OWNER_MASK;
238}
239
240static bool tegra_dc_owns_shared_plane(struct tegra_dc *dc,
241 struct tegra_plane *plane)
242{
243 struct device *dev = dc->dev;
244
245 if (tegra_shared_plane_get_owner(plane, dc) == dc->pipe) {
246 if (plane->dc == dc)
247 return true;
248
249 dev_WARN(dev, "head %u owns window %u but is not attached\n",
250 dc->pipe, plane->index);
251 }
252
253 return false;
254}
255
256static int tegra_shared_plane_set_owner(struct tegra_plane *plane,
257 struct tegra_dc *new)
258{
259 unsigned int offset =
260 tegra_plane_offset(plane, DC_WIN_CORE_WINDOWGROUP_SET_CONTROL);
261 struct tegra_dc *old = plane->dc, *dc = new ? new : old;
262 struct device *dev = new ? new->dev : old->dev;
263 unsigned int owner, index = plane->index;
264 u32 value;
265
266 value = tegra_dc_readl(dc, offset);
267 owner = value & OWNER_MASK;
268
269 if (new && (owner != OWNER_MASK && owner != new->pipe)) {
270 dev_WARN(dev, "window %u owned by head %u\n", index, owner);
271 return -EBUSY;
272 }
273
274 /*
275 * This seems to happen whenever the head has been disabled with one
276 * or more windows being active. This is harmless because we'll just
277 * reassign the window to the new head anyway.
278 */
279 if (old && owner == OWNER_MASK)
280 dev_dbg(dev, "window %u not owned by head %u but %u\n", index,
281 old->pipe, owner);
282
283 value &= ~OWNER_MASK;
284
285 if (new)
286 value |= OWNER(new->pipe);
287 else
288 value |= OWNER_MASK;
289
290 tegra_dc_writel(dc, value, offset);
291
292 plane->dc = new;
293
294 return 0;
295}
296
297static void tegra_shared_plane_setup_scaler(struct tegra_plane *plane)
298{
299 static const unsigned int coeffs[192] = {
300 0x00000000, 0x3c70e400, 0x3bb037e4, 0x0c51cc9c,
301 0x00100001, 0x3bf0dbfa, 0x3d00f406, 0x3fe003ff,
302 0x00300002, 0x3b80cbf5, 0x3da1040d, 0x3fb003fe,
303 0x00400002, 0x3b20bff1, 0x3e511015, 0x3f9003fc,
304 0x00500002, 0x3ad0b3ed, 0x3f21201d, 0x3f5003fb,
305 0x00500003, 0x3aa0a3e9, 0x3ff13026, 0x3f2007f9,
306 0x00500403, 0x3a7097e6, 0x00e1402f, 0x3ee007f7,
307 0x00500403, 0x3a608be4, 0x01d14c38, 0x3ea00bf6,
308 0x00500403, 0x3a507fe2, 0x02e15c42, 0x3e500ff4,
309 0x00500402, 0x3a6073e1, 0x03f16c4d, 0x3e000ff2,
310 0x00400402, 0x3a706be0, 0x05117858, 0x3db013f0,
311 0x00300402, 0x3a905fe0, 0x06318863, 0x3d6017ee,
312 0x00300402, 0x3ab057e0, 0x0771986e, 0x3d001beb,
313 0x00200001, 0x3af04fe1, 0x08a1a47a, 0x3cb023e9,
314 0x00100001, 0x3b2047e2, 0x09e1b485, 0x3c6027e7,
315 0x00100000, 0x3b703fe2, 0x0b11c091, 0x3c002fe6,
316 0x3f203800, 0x0391103f, 0x3ff0a014, 0x0811606c,
317 0x3f2037ff, 0x0351083c, 0x03e11842, 0x3f203c00,
318 0x3f302fff, 0x03010439, 0x04311c45, 0x3f104401,
319 0x3f302fff, 0x02c0fc35, 0x04812448, 0x3f104802,
320 0x3f4027ff, 0x0270f832, 0x04c1284b, 0x3f205003,
321 0x3f4023ff, 0x0230f030, 0x0511304e, 0x3f205403,
322 0x3f601fff, 0x01f0e82d, 0x05613451, 0x3f205c04,
323 0x3f701bfe, 0x01b0e02a, 0x05a13c54, 0x3f306006,
324 0x3f7017fe, 0x0170d827, 0x05f14057, 0x3f406807,
325 0x3f8017ff, 0x0140d424, 0x0641445a, 0x3f406c08,
326 0x3fa013ff, 0x0100cc22, 0x0681485d, 0x3f507409,
327 0x3fa00fff, 0x00d0c41f, 0x06d14c60, 0x3f607c0b,
328 0x3fc00fff, 0x0090bc1c, 0x07115063, 0x3f80840c,
329 0x3fd00bff, 0x0070b41a, 0x07515465, 0x3f908c0e,
330 0x3fe007ff, 0x0040b018, 0x07915868, 0x3fb0900f,
331 0x3ff00400, 0x0010a816, 0x07d15c6a, 0x3fd09811,
332 0x00a04c0e, 0x0460f442, 0x0240a827, 0x05c15859,
333 0x0090440d, 0x0440f040, 0x0480fc43, 0x00b05010,
334 0x0080400c, 0x0410ec3e, 0x04910044, 0x00d05411,
335 0x0070380b, 0x03f0e83d, 0x04b10846, 0x00e05812,
336 0x0060340a, 0x03d0e43b, 0x04d10c48, 0x00f06013,
337 0x00503009, 0x03b0e039, 0x04e11449, 0x01106415,
338 0x00402c08, 0x0390d838, 0x05011c4b, 0x01206c16,
339 0x00302807, 0x0370d436, 0x0511204c, 0x01407018,
340 0x00302406, 0x0340d034, 0x0531244e, 0x01507419,
341 0x00202005, 0x0320cc32, 0x05412c50, 0x01707c1b,
342 0x00101c04, 0x0300c431, 0x05613451, 0x0180801d,
343 0x00101803, 0x02e0c02f, 0x05713853, 0x01a0881e,
344 0x00101002, 0x02b0bc2d, 0x05814054, 0x01c08c20,
345 0x00000c02, 0x02a0b82c, 0x05914455, 0x01e09421,
346 0x00000801, 0x0280b02a, 0x05a14c57, 0x02009c23,
347 0x00000400, 0x0260ac28, 0x05b15458, 0x0220a025,
348 };
349 unsigned int ratio, row, column;
350
351 for (ratio = 0; ratio <= 2; ratio++) {
352 for (row = 0; row <= 15; row++) {
353 for (column = 0; column <= 3; column++) {
354 unsigned int index = (ratio << 6) + (row << 2) + column;
355 u32 value;
356
357 value = COEFF_INDEX(index) | COEFF_DATA(coeffs[index]);
358 tegra_plane_writel(plane, value,
359 DC_WIN_WINDOWGROUP_SET_INPUT_SCALER_COEFF);
360 }
361 }
362 }
363}
364
365static void tegra_dc_assign_shared_plane(struct tegra_dc *dc,
366 struct tegra_plane *plane)
367{
368 u32 value;
369 int err;
370
371 if (!tegra_dc_owns_shared_plane(dc, plane)) {
372 err = tegra_shared_plane_set_owner(plane, dc);
373 if (err < 0)
374 return;
375 }
376
377 value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_LINEBUF_CONFIG);
378 value |= MODE_FOUR_LINES;
379 tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_LINEBUF_CONFIG);
380
381 value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_WGRP_FETCH_METER);
382 value = SLOTS(1);
383 tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_WGRP_FETCH_METER);
384
385 /* disable watermark */
386 value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_WGRP_LATENCY_CTLA);
387 value &= ~LATENCY_CTL_MODE_ENABLE;
388 tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_WGRP_LATENCY_CTLA);
389
390 value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_WGRP_LATENCY_CTLB);
391 value |= WATERMARK_MASK;
392 tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_WGRP_LATENCY_CTLB);
393
394 /* pipe meter */
395 value = tegra_plane_readl(plane, DC_WIN_CORE_PRECOMP_WGRP_PIPE_METER);
396 value = PIPE_METER_INT(0) | PIPE_METER_FRAC(0);
397 tegra_plane_writel(plane, value, DC_WIN_CORE_PRECOMP_WGRP_PIPE_METER);
398
399 /* mempool entries */
400 value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_WGRP_POOL_CONFIG);
401 value = MEMPOOL_ENTRIES(0x331);
402 tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_WGRP_POOL_CONFIG);
403
404 value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_THREAD_GROUP);
405 value &= ~THREAD_NUM_MASK;
406 value |= THREAD_NUM(plane->base.index);
407 value |= THREAD_GROUP_ENABLE;
408 tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_THREAD_GROUP);
409
410 tegra_shared_plane_setup_scaler(plane);
411
412 tegra_shared_plane_update(plane);
413 tegra_shared_plane_activate(plane);
414}
415
416static void tegra_dc_remove_shared_plane(struct tegra_dc *dc,
417 struct tegra_plane *plane)
418{
419 tegra_shared_plane_set_owner(plane, NULL);
420}
421
422static int tegra_shared_plane_atomic_check(struct drm_plane *plane,
423 struct drm_atomic_state *state)
424{
425 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
426 plane);
427 struct tegra_plane_state *plane_state = to_tegra_plane_state(new_plane_state);
428 struct tegra_shared_plane *tegra = to_tegra_shared_plane(plane);
429 struct tegra_bo_tiling *tiling = &plane_state->tiling;
430 struct tegra_dc *dc = to_tegra_dc(new_plane_state->crtc);
431 int err;
432
433 /* no need for further checks if the plane is being disabled */
434 if (!new_plane_state->crtc || !new_plane_state->fb)
435 return 0;
436
437 err = tegra_plane_format(new_plane_state->fb->format->format,
438 &plane_state->format,
439 &plane_state->swap);
440 if (err < 0)
441 return err;
442
443 err = tegra_fb_get_tiling(new_plane_state->fb, tiling);
444 if (err < 0)
445 return err;
446
447 if (tiling->mode == TEGRA_BO_TILING_MODE_BLOCK &&
448 !dc->soc->supports_block_linear) {
449 DRM_ERROR("hardware doesn't support block linear mode\n");
450 return -EINVAL;
451 }
452
453 if (tiling->sector_layout == TEGRA_BO_SECTOR_LAYOUT_GPU &&
454 !dc->soc->supports_sector_layout) {
455 DRM_ERROR("hardware doesn't support GPU sector layout\n");
456 return -EINVAL;
457 }
458
459 /*
460 * Tegra doesn't support different strides for U and V planes so we
461 * error out if the user tries to display a framebuffer with such a
462 * configuration.
463 */
464 if (new_plane_state->fb->format->num_planes > 2) {
465 if (new_plane_state->fb->pitches[2] != new_plane_state->fb->pitches[1]) {
466 DRM_ERROR("unsupported UV-plane configuration\n");
467 return -EINVAL;
468 }
469 }
470
471 /* XXX scaling is not yet supported, add a check here */
472
473 err = tegra_plane_state_add(&tegra->base, new_plane_state);
474 if (err < 0)
475 return err;
476
477 return 0;
478}
479
480static void tegra_shared_plane_atomic_disable(struct drm_plane *plane,
481 struct drm_atomic_state *state)
482{
483 struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
484 plane);
485 struct tegra_plane *p = to_tegra_plane(plane);
486 struct tegra_dc *dc;
487 u32 value;
488 int err;
489
490 /* rien ne va plus */
491 if (!old_state || !old_state->crtc)
492 return;
493
494 dc = to_tegra_dc(old_state->crtc);
495
496 err = host1x_client_resume(&dc->client);
497 if (err < 0) {
498 dev_err(dc->dev, "failed to resume: %d\n", err);
499 return;
500 }
501
502 /*
503 * XXX Legacy helpers seem to sometimes call ->atomic_disable() even
504 * on planes that are already disabled. Make sure we fallback to the
505 * head for this particular state instead of crashing.
506 */
507 if (WARN_ON(p->dc == NULL))
508 p->dc = dc;
509
510 value = tegra_plane_readl(p, DC_WIN_WIN_OPTIONS);
511 value &= ~WIN_ENABLE;
512 tegra_plane_writel(p, value, DC_WIN_WIN_OPTIONS);
513
514 tegra_dc_remove_shared_plane(dc, p);
515
516 host1x_client_suspend(&dc->client);
517}
518
519static inline u32 compute_phase_incr(fixed20_12 in, unsigned int out)
520{
521 u64 tmp, tmp1, tmp2;
522
523 tmp = (u64)dfixed_trunc(in);
524 tmp2 = (u64)out;
525 tmp1 = (tmp << NFB) + (tmp2 >> 1);
526 do_div(tmp1, tmp2);
527
528 return lower_32_bits(tmp1);
529}
530
531static void tegra_shared_plane_atomic_update(struct drm_plane *plane,
532 struct drm_atomic_state *state)
533{
534 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
535 plane);
536 struct tegra_plane_state *tegra_plane_state = to_tegra_plane_state(new_state);
537 struct tegra_dc *dc = to_tegra_dc(new_state->crtc);
538 unsigned int zpos = new_state->normalized_zpos;
539 struct drm_framebuffer *fb = new_state->fb;
540 struct tegra_plane *p = to_tegra_plane(plane);
541 u32 value, min_width, bypass = 0;
542 dma_addr_t base, addr_flag = 0;
543 unsigned int bpc;
544 bool yuv, planar;
545 int err;
546
547 /* rien ne va plus */
548 if (!new_state->crtc || !new_state->fb)
549 return;
550
551 if (!new_state->visible) {
552 tegra_shared_plane_atomic_disable(plane, state);
553 return;
554 }
555
556 err = host1x_client_resume(&dc->client);
557 if (err < 0) {
558 dev_err(dc->dev, "failed to resume: %d\n", err);
559 return;
560 }
561
562 yuv = tegra_plane_format_is_yuv(tegra_plane_state->format, &planar, &bpc);
563
564 tegra_dc_assign_shared_plane(dc, p);
565
566 tegra_plane_writel(p, VCOUNTER, DC_WIN_CORE_ACT_CONTROL);
567
568 /* blending */
569 value = BLEND_FACTOR_DST_ALPHA_ZERO | BLEND_FACTOR_SRC_ALPHA_K2 |
570 BLEND_FACTOR_DST_COLOR_NEG_K1_TIMES_SRC |
571 BLEND_FACTOR_SRC_COLOR_K1_TIMES_SRC;
572 tegra_plane_writel(p, value, DC_WIN_BLEND_MATCH_SELECT);
573
574 value = BLEND_FACTOR_DST_ALPHA_ZERO | BLEND_FACTOR_SRC_ALPHA_K2 |
575 BLEND_FACTOR_DST_COLOR_NEG_K1_TIMES_SRC |
576 BLEND_FACTOR_SRC_COLOR_K1_TIMES_SRC;
577 tegra_plane_writel(p, value, DC_WIN_BLEND_NOMATCH_SELECT);
578
579 value = K2(255) | K1(255) | WINDOW_LAYER_DEPTH(255 - zpos);
580 tegra_plane_writel(p, value, DC_WIN_BLEND_LAYER_CONTROL);
581
582 /* scaling */
583 min_width = min(new_state->src_w >> 16, new_state->crtc_w);
584
585 value = tegra_plane_readl(p, DC_WINC_PRECOMP_WGRP_PIPE_CAPC);
586
587 if (min_width < MAX_PIXELS_5TAP444(value)) {
588 value = HORIZONTAL_TAPS_5 | VERTICAL_TAPS_5;
589 } else {
590 value = tegra_plane_readl(p, DC_WINC_PRECOMP_WGRP_PIPE_CAPE);
591
592 if (min_width < MAX_PIXELS_2TAP444(value))
593 value = HORIZONTAL_TAPS_2 | VERTICAL_TAPS_2;
594 else
595 dev_err(dc->dev, "invalid minimum width: %u\n", min_width);
596 }
597
598 value = HORIZONTAL_TAPS_5 | VERTICAL_TAPS_5;
599 tegra_plane_writel(p, value, DC_WIN_WINDOWGROUP_SET_CONTROL_INPUT_SCALER);
600
601 if (new_state->src_w != new_state->crtc_w << 16) {
602 fixed20_12 width = dfixed_init(new_state->src_w >> 16);
603 u32 incr = compute_phase_incr(width, new_state->crtc_w) & ~0x1;
604 u32 init = (1 << (NFB - 1)) + (incr >> 1);
605
606 tegra_plane_writel(p, incr, DC_WIN_SET_INPUT_SCALER_HPHASE_INCR);
607 tegra_plane_writel(p, init, DC_WIN_SET_INPUT_SCALER_H_START_PHASE);
608 } else {
609 bypass |= INPUT_SCALER_HBYPASS;
610 }
611
612 if (new_state->src_h != new_state->crtc_h << 16) {
613 fixed20_12 height = dfixed_init(new_state->src_h >> 16);
614 u32 incr = compute_phase_incr(height, new_state->crtc_h) & ~0x1;
615 u32 init = (1 << (NFB - 1)) + (incr >> 1);
616
617 tegra_plane_writel(p, incr, DC_WIN_SET_INPUT_SCALER_VPHASE_INCR);
618 tegra_plane_writel(p, init, DC_WIN_SET_INPUT_SCALER_V_START_PHASE);
619 } else {
620 bypass |= INPUT_SCALER_VBYPASS;
621 }
622
623 tegra_plane_writel(p, bypass, DC_WIN_WINDOWGROUP_SET_INPUT_SCALER_USAGE);
624
625 /* disable compression */
626 tegra_plane_writel(p, 0, DC_WINBUF_CDE_CONTROL);
627
628#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
629 /*
630 * Physical address bit 39 in Tegra194 is used as a switch for special
631 * logic that swizzles the memory using either the legacy Tegra or the
632 * dGPU sector layout.
633 */
634 if (tegra_plane_state->tiling.sector_layout == TEGRA_BO_SECTOR_LAYOUT_GPU)
635 addr_flag = BIT_ULL(39);
636#endif
637
638 base = tegra_plane_state->iova[0] + fb->offsets[0];
639 base |= addr_flag;
640
641 tegra_plane_writel(p, tegra_plane_state->format, DC_WIN_COLOR_DEPTH);
642 tegra_plane_writel(p, 0, DC_WIN_PRECOMP_WGRP_PARAMS);
643
644 value = V_POSITION(new_state->crtc_y) |
645 H_POSITION(new_state->crtc_x);
646 tegra_plane_writel(p, value, DC_WIN_POSITION);
647
648 value = V_SIZE(new_state->crtc_h) | H_SIZE(new_state->crtc_w);
649 tegra_plane_writel(p, value, DC_WIN_SIZE);
650
651 value = WIN_ENABLE | COLOR_EXPAND;
652 tegra_plane_writel(p, value, DC_WIN_WIN_OPTIONS);
653
654 value = V_SIZE(new_state->src_h >> 16) | H_SIZE(new_state->src_w >> 16);
655 tegra_plane_writel(p, value, DC_WIN_CROPPED_SIZE);
656
657 tegra_plane_writel(p, upper_32_bits(base), DC_WINBUF_START_ADDR_HI);
658 tegra_plane_writel(p, lower_32_bits(base), DC_WINBUF_START_ADDR);
659
660 value = PITCH(fb->pitches[0]);
661 tegra_plane_writel(p, value, DC_WIN_PLANAR_STORAGE);
662
663 if (yuv && planar) {
664 base = tegra_plane_state->iova[1] + fb->offsets[1];
665 base |= addr_flag;
666
667 tegra_plane_writel(p, upper_32_bits(base), DC_WINBUF_START_ADDR_HI_U);
668 tegra_plane_writel(p, lower_32_bits(base), DC_WINBUF_START_ADDR_U);
669
670 base = tegra_plane_state->iova[2] + fb->offsets[2];
671 base |= addr_flag;
672
673 tegra_plane_writel(p, upper_32_bits(base), DC_WINBUF_START_ADDR_HI_V);
674 tegra_plane_writel(p, lower_32_bits(base), DC_WINBUF_START_ADDR_V);
675
676 value = PITCH_U(fb->pitches[2]) | PITCH_V(fb->pitches[2]);
677 tegra_plane_writel(p, value, DC_WIN_PLANAR_STORAGE_UV);
678 } else {
679 tegra_plane_writel(p, 0, DC_WINBUF_START_ADDR_U);
680 tegra_plane_writel(p, 0, DC_WINBUF_START_ADDR_HI_U);
681 tegra_plane_writel(p, 0, DC_WINBUF_START_ADDR_V);
682 tegra_plane_writel(p, 0, DC_WINBUF_START_ADDR_HI_V);
683 tegra_plane_writel(p, 0, DC_WIN_PLANAR_STORAGE_UV);
684 }
685
686 value = CLAMP_BEFORE_BLEND | INPUT_RANGE_FULL;
687
688 if (yuv) {
689 if (bpc < 12)
690 value |= DEGAMMA_YUV8_10;
691 else
692 value |= DEGAMMA_YUV12;
693
694 /* XXX parameterize */
695 value |= COLOR_SPACE_YUV_2020;
696 } else {
697 if (!tegra_plane_format_is_indexed(tegra_plane_state->format))
698 value |= DEGAMMA_SRGB;
699 }
700
701 tegra_plane_writel(p, value, DC_WIN_SET_PARAMS);
702
703 value = OFFSET_X(new_state->src_y >> 16) |
704 OFFSET_Y(new_state->src_x >> 16);
705 tegra_plane_writel(p, value, DC_WINBUF_CROPPED_POINT);
706
707 if (dc->soc->supports_block_linear) {
708 unsigned long height = tegra_plane_state->tiling.value;
709
710 /* XXX */
711 switch (tegra_plane_state->tiling.mode) {
712 case TEGRA_BO_TILING_MODE_PITCH:
713 value = DC_WINBUF_SURFACE_KIND_BLOCK_HEIGHT(0) |
714 DC_WINBUF_SURFACE_KIND_PITCH;
715 break;
716
717 /* XXX not supported on Tegra186 and later */
718 case TEGRA_BO_TILING_MODE_TILED:
719 value = DC_WINBUF_SURFACE_KIND_TILED;
720 break;
721
722 case TEGRA_BO_TILING_MODE_BLOCK:
723 value = DC_WINBUF_SURFACE_KIND_BLOCK_HEIGHT(height) |
724 DC_WINBUF_SURFACE_KIND_BLOCK;
725 break;
726 }
727
728 tegra_plane_writel(p, value, DC_WINBUF_SURFACE_KIND);
729 }
730
731 /* disable gamut CSC */
732 value = tegra_plane_readl(p, DC_WIN_WINDOW_SET_CONTROL);
733 value &= ~CONTROL_CSC_ENABLE;
734 tegra_plane_writel(p, value, DC_WIN_WINDOW_SET_CONTROL);
735
736 host1x_client_suspend(&dc->client);
737}
738
739static const struct drm_plane_helper_funcs tegra_shared_plane_helper_funcs = {
740 .prepare_fb = tegra_plane_prepare_fb,
741 .cleanup_fb = tegra_plane_cleanup_fb,
742 .atomic_check = tegra_shared_plane_atomic_check,
743 .atomic_update = tegra_shared_plane_atomic_update,
744 .atomic_disable = tegra_shared_plane_atomic_disable,
745};
746
747struct drm_plane *tegra_shared_plane_create(struct drm_device *drm,
748 struct tegra_dc *dc,
749 unsigned int wgrp,
750 unsigned int index)
751{
752 enum drm_plane_type type = DRM_PLANE_TYPE_OVERLAY;
753 struct tegra_drm *tegra = drm->dev_private;
754 struct tegra_display_hub *hub = tegra->hub;
755 struct tegra_shared_plane *plane;
756 unsigned int possible_crtcs;
757 unsigned int num_formats;
758 const u64 *modifiers;
759 struct drm_plane *p;
760 const u32 *formats;
761 int err;
762
763 plane = kzalloc(sizeof(*plane), GFP_KERNEL);
764 if (!plane)
765 return ERR_PTR(-ENOMEM);
766
767 plane->base.offset = 0x0a00 + 0x0300 * index;
768 plane->base.index = index;
769
770 plane->wgrp = &hub->wgrps[wgrp];
771 plane->wgrp->parent = &dc->client;
772
773 p = &plane->base.base;
774
775 /* planes can be assigned to arbitrary CRTCs */
776 possible_crtcs = BIT(tegra->num_crtcs) - 1;
777
778 num_formats = ARRAY_SIZE(tegra_shared_plane_formats);
779 formats = tegra_shared_plane_formats;
780 modifiers = tegra_shared_plane_modifiers;
781
782 err = drm_universal_plane_init(drm, p, possible_crtcs,
783 &tegra_plane_funcs, formats,
784 num_formats, modifiers, type, NULL);
785 if (err < 0) {
786 kfree(plane);
787 return ERR_PTR(err);
788 }
789
790 drm_plane_helper_add(p, &tegra_shared_plane_helper_funcs);
791 drm_plane_create_zpos_property(p, 0, 0, 255);
792
793 return p;
794}
795
796static struct drm_private_state *
797tegra_display_hub_duplicate_state(struct drm_private_obj *obj)
798{
799 struct tegra_display_hub_state *state;
800
801 state = kmemdup(obj->state, sizeof(*state), GFP_KERNEL);
802 if (!state)
803 return NULL;
804
805 __drm_atomic_helper_private_obj_duplicate_state(obj, &state->base);
806
807 return &state->base;
808}
809
810static void tegra_display_hub_destroy_state(struct drm_private_obj *obj,
811 struct drm_private_state *state)
812{
813 struct tegra_display_hub_state *hub_state =
814 to_tegra_display_hub_state(state);
815
816 kfree(hub_state);
817}
818
819static const struct drm_private_state_funcs tegra_display_hub_state_funcs = {
820 .atomic_duplicate_state = tegra_display_hub_duplicate_state,
821 .atomic_destroy_state = tegra_display_hub_destroy_state,
822};
823
824static struct tegra_display_hub_state *
825tegra_display_hub_get_state(struct tegra_display_hub *hub,
826 struct drm_atomic_state *state)
827{
828 struct drm_private_state *priv;
829
830 priv = drm_atomic_get_private_obj_state(state, &hub->base);
831 if (IS_ERR(priv))
832 return ERR_CAST(priv);
833
834 return to_tegra_display_hub_state(priv);
835}
836
837int tegra_display_hub_atomic_check(struct drm_device *drm,
838 struct drm_atomic_state *state)
839{
840 struct tegra_drm *tegra = drm->dev_private;
841 struct tegra_display_hub_state *hub_state;
842 struct drm_crtc_state *old, *new;
843 struct drm_crtc *crtc;
844 unsigned int i;
845
846 if (!tegra->hub)
847 return 0;
848
849 hub_state = tegra_display_hub_get_state(tegra->hub, state);
850 if (IS_ERR(hub_state))
851 return PTR_ERR(hub_state);
852
853 /*
854 * The display hub display clock needs to be fed by the display clock
855 * with the highest frequency to ensure proper functioning of all the
856 * displays.
857 *
858 * Note that this isn't used before Tegra186, but it doesn't hurt and
859 * conditionalizing it would make the code less clean.
860 */
861 for_each_oldnew_crtc_in_state(state, crtc, old, new, i) {
862 struct tegra_dc_state *dc = to_dc_state(new);
863
864 if (new->active) {
865 if (!hub_state->clk || dc->pclk > hub_state->rate) {
866 hub_state->dc = to_tegra_dc(dc->base.crtc);
867 hub_state->clk = hub_state->dc->clk;
868 hub_state->rate = dc->pclk;
869 }
870 }
871 }
872
873 return 0;
874}
875
876static void tegra_display_hub_update(struct tegra_dc *dc)
877{
878 u32 value;
879 int err;
880
881 err = host1x_client_resume(&dc->client);
882 if (err < 0) {
883 dev_err(dc->dev, "failed to resume: %d\n", err);
884 return;
885 }
886
887 value = tegra_dc_readl(dc, DC_CMD_IHUB_COMMON_MISC_CTL);
888 value &= ~LATENCY_EVENT;
889 tegra_dc_writel(dc, value, DC_CMD_IHUB_COMMON_MISC_CTL);
890
891 value = tegra_dc_readl(dc, DC_DISP_IHUB_COMMON_DISPLAY_FETCH_METER);
892 value = CURS_SLOTS(1) | WGRP_SLOTS(1);
893 tegra_dc_writel(dc, value, DC_DISP_IHUB_COMMON_DISPLAY_FETCH_METER);
894
895 tegra_dc_writel(dc, COMMON_UPDATE, DC_CMD_STATE_CONTROL);
896 tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
897 tegra_dc_writel(dc, COMMON_ACTREQ, DC_CMD_STATE_CONTROL);
898 tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
899
900 host1x_client_suspend(&dc->client);
901}
902
903void tegra_display_hub_atomic_commit(struct drm_device *drm,
904 struct drm_atomic_state *state)
905{
906 struct tegra_drm *tegra = drm->dev_private;
907 struct tegra_display_hub *hub = tegra->hub;
908 struct tegra_display_hub_state *hub_state;
909 struct device *dev = hub->client.dev;
910 int err;
911
912 hub_state = to_tegra_display_hub_state(hub->base.state);
913
914 if (hub_state->clk) {
915 err = clk_set_rate(hub_state->clk, hub_state->rate);
916 if (err < 0)
917 dev_err(dev, "failed to set rate of %pC to %lu Hz\n",
918 hub_state->clk, hub_state->rate);
919
920 err = clk_set_parent(hub->clk_disp, hub_state->clk);
921 if (err < 0)
922 dev_err(dev, "failed to set parent of %pC to %pC: %d\n",
923 hub->clk_disp, hub_state->clk, err);
924 }
925
926 if (hub_state->dc)
927 tegra_display_hub_update(hub_state->dc);
928}
929
930static int tegra_display_hub_init(struct host1x_client *client)
931{
932 struct tegra_display_hub *hub = to_tegra_display_hub(client);
933 struct drm_device *drm = dev_get_drvdata(client->host);
934 struct tegra_drm *tegra = drm->dev_private;
935 struct tegra_display_hub_state *state;
936
937 state = kzalloc(sizeof(*state), GFP_KERNEL);
938 if (!state)
939 return -ENOMEM;
940
941 drm_atomic_private_obj_init(drm, &hub->base, &state->base,
942 &tegra_display_hub_state_funcs);
943
944 tegra->hub = hub;
945
946 return 0;
947}
948
949static int tegra_display_hub_exit(struct host1x_client *client)
950{
951 struct drm_device *drm = dev_get_drvdata(client->host);
952 struct tegra_drm *tegra = drm->dev_private;
953
954 drm_atomic_private_obj_fini(&tegra->hub->base);
955 tegra->hub = NULL;
956
957 return 0;
958}
959
960static int tegra_display_hub_runtime_suspend(struct host1x_client *client)
961{
962 struct tegra_display_hub *hub = to_tegra_display_hub(client);
963 struct device *dev = client->dev;
964 unsigned int i = hub->num_heads;
965 int err;
966
967 err = reset_control_assert(hub->rst);
968 if (err < 0)
969 return err;
970
971 while (i--)
972 clk_disable_unprepare(hub->clk_heads[i]);
973
974 clk_disable_unprepare(hub->clk_hub);
975 clk_disable_unprepare(hub->clk_dsc);
976 clk_disable_unprepare(hub->clk_disp);
977
978 pm_runtime_put_sync(dev);
979
980 return 0;
981}
982
983static int tegra_display_hub_runtime_resume(struct host1x_client *client)
984{
985 struct tegra_display_hub *hub = to_tegra_display_hub(client);
986 struct device *dev = client->dev;
987 unsigned int i;
988 int err;
989
990 err = pm_runtime_resume_and_get(dev);
991 if (err < 0) {
992 dev_err(dev, "failed to get runtime PM: %d\n", err);
993 return err;
994 }
995
996 err = clk_prepare_enable(hub->clk_disp);
997 if (err < 0)
998 goto put_rpm;
999
1000 err = clk_prepare_enable(hub->clk_dsc);
1001 if (err < 0)
1002 goto disable_disp;
1003
1004 err = clk_prepare_enable(hub->clk_hub);
1005 if (err < 0)
1006 goto disable_dsc;
1007
1008 for (i = 0; i < hub->num_heads; i++) {
1009 err = clk_prepare_enable(hub->clk_heads[i]);
1010 if (err < 0)
1011 goto disable_heads;
1012 }
1013
1014 err = reset_control_deassert(hub->rst);
1015 if (err < 0)
1016 goto disable_heads;
1017
1018 return 0;
1019
1020disable_heads:
1021 while (i--)
1022 clk_disable_unprepare(hub->clk_heads[i]);
1023
1024 clk_disable_unprepare(hub->clk_hub);
1025disable_dsc:
1026 clk_disable_unprepare(hub->clk_dsc);
1027disable_disp:
1028 clk_disable_unprepare(hub->clk_disp);
1029put_rpm:
1030 pm_runtime_put_sync(dev);
1031 return err;
1032}
1033
1034static const struct host1x_client_ops tegra_display_hub_ops = {
1035 .init = tegra_display_hub_init,
1036 .exit = tegra_display_hub_exit,
1037 .suspend = tegra_display_hub_runtime_suspend,
1038 .resume = tegra_display_hub_runtime_resume,
1039};
1040
1041static int tegra_display_hub_probe(struct platform_device *pdev)
1042{
1043 u64 dma_mask = dma_get_mask(pdev->dev.parent);
1044 struct device_node *child = NULL;
1045 struct tegra_display_hub *hub;
1046 struct clk *clk;
1047 unsigned int i;
1048 int err;
1049
1050 err = dma_coerce_mask_and_coherent(&pdev->dev, dma_mask);
1051 if (err < 0) {
1052 dev_err(&pdev->dev, "failed to set DMA mask: %d\n", err);
1053 return err;
1054 }
1055
1056 hub = devm_kzalloc(&pdev->dev, sizeof(*hub), GFP_KERNEL);
1057 if (!hub)
1058 return -ENOMEM;
1059
1060 hub->soc = of_device_get_match_data(&pdev->dev);
1061
1062 hub->clk_disp = devm_clk_get(&pdev->dev, "disp");
1063 if (IS_ERR(hub->clk_disp)) {
1064 err = PTR_ERR(hub->clk_disp);
1065 return err;
1066 }
1067
1068 if (hub->soc->supports_dsc) {
1069 hub->clk_dsc = devm_clk_get(&pdev->dev, "dsc");
1070 if (IS_ERR(hub->clk_dsc)) {
1071 err = PTR_ERR(hub->clk_dsc);
1072 return err;
1073 }
1074 }
1075
1076 hub->clk_hub = devm_clk_get(&pdev->dev, "hub");
1077 if (IS_ERR(hub->clk_hub)) {
1078 err = PTR_ERR(hub->clk_hub);
1079 return err;
1080 }
1081
1082 hub->rst = devm_reset_control_get(&pdev->dev, "misc");
1083 if (IS_ERR(hub->rst)) {
1084 err = PTR_ERR(hub->rst);
1085 return err;
1086 }
1087
1088 hub->wgrps = devm_kcalloc(&pdev->dev, hub->soc->num_wgrps,
1089 sizeof(*hub->wgrps), GFP_KERNEL);
1090 if (!hub->wgrps)
1091 return -ENOMEM;
1092
1093 for (i = 0; i < hub->soc->num_wgrps; i++) {
1094 struct tegra_windowgroup *wgrp = &hub->wgrps[i];
1095 char id[8];
1096
1097 snprintf(id, sizeof(id), "wgrp%u", i);
1098 mutex_init(&wgrp->lock);
1099 wgrp->usecount = 0;
1100 wgrp->index = i;
1101
1102 wgrp->rst = devm_reset_control_get(&pdev->dev, id);
1103 if (IS_ERR(wgrp->rst))
1104 return PTR_ERR(wgrp->rst);
1105
1106 err = reset_control_assert(wgrp->rst);
1107 if (err < 0)
1108 return err;
1109 }
1110
1111 hub->num_heads = of_get_child_count(pdev->dev.of_node);
1112
1113 hub->clk_heads = devm_kcalloc(&pdev->dev, hub->num_heads, sizeof(clk),
1114 GFP_KERNEL);
1115 if (!hub->clk_heads)
1116 return -ENOMEM;
1117
1118 for (i = 0; i < hub->num_heads; i++) {
1119 child = of_get_next_child(pdev->dev.of_node, child);
1120 if (!child) {
1121 dev_err(&pdev->dev, "failed to find node for head %u\n",
1122 i);
1123 return -ENODEV;
1124 }
1125
1126 clk = devm_get_clk_from_child(&pdev->dev, child, "dc");
1127 if (IS_ERR(clk)) {
1128 dev_err(&pdev->dev, "failed to get clock for head %u\n",
1129 i);
1130 of_node_put(child);
1131 return PTR_ERR(clk);
1132 }
1133
1134 hub->clk_heads[i] = clk;
1135 }
1136
1137 of_node_put(child);
1138
1139 /* XXX: enable clock across reset? */
1140 err = reset_control_assert(hub->rst);
1141 if (err < 0)
1142 return err;
1143
1144 platform_set_drvdata(pdev, hub);
1145 pm_runtime_enable(&pdev->dev);
1146
1147 INIT_LIST_HEAD(&hub->client.list);
1148 hub->client.ops = &tegra_display_hub_ops;
1149 hub->client.dev = &pdev->dev;
1150
1151 err = host1x_client_register(&hub->client);
1152 if (err < 0)
1153 dev_err(&pdev->dev, "failed to register host1x client: %d\n",
1154 err);
1155
1156 err = devm_of_platform_populate(&pdev->dev);
1157 if (err < 0)
1158 goto unregister;
1159
1160 return err;
1161
1162unregister:
1163 host1x_client_unregister(&hub->client);
1164 pm_runtime_disable(&pdev->dev);
1165 return err;
1166}
1167
1168static int tegra_display_hub_remove(struct platform_device *pdev)
1169{
1170 struct tegra_display_hub *hub = platform_get_drvdata(pdev);
1171 unsigned int i;
1172 int err;
1173
1174 err = host1x_client_unregister(&hub->client);
1175 if (err < 0) {
1176 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
1177 err);
1178 }
1179
1180 for (i = 0; i < hub->soc->num_wgrps; i++) {
1181 struct tegra_windowgroup *wgrp = &hub->wgrps[i];
1182
1183 mutex_destroy(&wgrp->lock);
1184 }
1185
1186 pm_runtime_disable(&pdev->dev);
1187
1188 return err;
1189}
1190
1191static const struct tegra_display_hub_soc tegra186_display_hub = {
1192 .num_wgrps = 6,
1193 .supports_dsc = true,
1194};
1195
1196static const struct tegra_display_hub_soc tegra194_display_hub = {
1197 .num_wgrps = 6,
1198 .supports_dsc = false,
1199};
1200
1201static const struct of_device_id tegra_display_hub_of_match[] = {
1202 {
1203 .compatible = "nvidia,tegra194-display",
1204 .data = &tegra194_display_hub
1205 }, {
1206 .compatible = "nvidia,tegra186-display",
1207 .data = &tegra186_display_hub
1208 }, {
1209 /* sentinel */
1210 }
1211};
1212MODULE_DEVICE_TABLE(of, tegra_display_hub_of_match);
1213
1214struct platform_driver tegra_display_hub_driver = {
1215 .driver = {
1216 .name = "tegra-display-hub",
1217 .of_match_table = tegra_display_hub_of_match,
1218 },
1219 .probe = tegra_display_hub_probe,
1220 .remove = tegra_display_hub_remove,
1221};
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2017 NVIDIA CORPORATION. All rights reserved.
4 */
5
6#include <linux/clk.h>
7#include <linux/delay.h>
8#include <linux/dma-mapping.h>
9#include <linux/host1x.h>
10#include <linux/module.h>
11#include <linux/of.h>
12#include <linux/of_graph.h>
13#include <linux/of_platform.h>
14#include <linux/platform_device.h>
15#include <linux/pm_runtime.h>
16#include <linux/reset.h>
17
18#include <drm/drm_atomic.h>
19#include <drm/drm_atomic_helper.h>
20#include <drm/drm_blend.h>
21#include <drm/drm_fourcc.h>
22#include <drm/drm_framebuffer.h>
23#include <drm/drm_probe_helper.h>
24
25#include "drm.h"
26#include "dc.h"
27#include "plane.h"
28
29#define NFB 24
30
31static const u32 tegra_shared_plane_formats[] = {
32 DRM_FORMAT_ARGB1555,
33 DRM_FORMAT_RGB565,
34 DRM_FORMAT_RGBA5551,
35 DRM_FORMAT_ARGB8888,
36 DRM_FORMAT_ABGR8888,
37 /* new on Tegra114 */
38 DRM_FORMAT_ABGR4444,
39 DRM_FORMAT_ABGR1555,
40 DRM_FORMAT_BGRA5551,
41 DRM_FORMAT_XRGB1555,
42 DRM_FORMAT_RGBX5551,
43 DRM_FORMAT_XBGR1555,
44 DRM_FORMAT_BGRX5551,
45 DRM_FORMAT_BGR565,
46 DRM_FORMAT_XRGB8888,
47 DRM_FORMAT_XBGR8888,
48 /* planar formats */
49 DRM_FORMAT_UYVY,
50 DRM_FORMAT_YUYV,
51 DRM_FORMAT_YUV420,
52 DRM_FORMAT_YUV422,
53};
54
55static const u64 tegra_shared_plane_modifiers[] = {
56 DRM_FORMAT_MOD_LINEAR,
57 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0),
58 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1),
59 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2),
60 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(3),
61 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(4),
62 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(5),
63 /*
64 * The GPU sector layout is only supported on Tegra194, but these will
65 * be filtered out later on by ->format_mod_supported() on SoCs where
66 * it isn't supported.
67 */
68 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0) | DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT,
69 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1) | DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT,
70 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2) | DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT,
71 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(3) | DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT,
72 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(4) | DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT,
73 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(5) | DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT,
74 /* sentinel */
75 DRM_FORMAT_MOD_INVALID
76};
77
78static inline unsigned int tegra_plane_offset(struct tegra_plane *plane,
79 unsigned int offset)
80{
81 if (offset >= 0x500 && offset <= 0x581) {
82 offset = 0x000 + (offset - 0x500);
83 return plane->offset + offset;
84 }
85
86 if (offset >= 0x700 && offset <= 0x73c) {
87 offset = 0x180 + (offset - 0x700);
88 return plane->offset + offset;
89 }
90
91 if (offset >= 0x800 && offset <= 0x83e) {
92 offset = 0x1c0 + (offset - 0x800);
93 return plane->offset + offset;
94 }
95
96 dev_WARN(plane->dc->dev, "invalid offset: %x\n", offset);
97
98 return plane->offset + offset;
99}
100
101static inline u32 tegra_plane_readl(struct tegra_plane *plane,
102 unsigned int offset)
103{
104 return tegra_dc_readl(plane->dc, tegra_plane_offset(plane, offset));
105}
106
107static inline void tegra_plane_writel(struct tegra_plane *plane, u32 value,
108 unsigned int offset)
109{
110 tegra_dc_writel(plane->dc, value, tegra_plane_offset(plane, offset));
111}
112
113static int tegra_windowgroup_enable(struct tegra_windowgroup *wgrp)
114{
115 int err = 0;
116
117 mutex_lock(&wgrp->lock);
118
119 if (wgrp->usecount == 0) {
120 err = host1x_client_resume(wgrp->parent);
121 if (err < 0) {
122 dev_err(wgrp->parent->dev, "failed to resume: %d\n", err);
123 goto unlock;
124 }
125
126 reset_control_deassert(wgrp->rst);
127 }
128
129 wgrp->usecount++;
130
131unlock:
132 mutex_unlock(&wgrp->lock);
133 return err;
134}
135
136static void tegra_windowgroup_disable(struct tegra_windowgroup *wgrp)
137{
138 int err;
139
140 mutex_lock(&wgrp->lock);
141
142 if (wgrp->usecount == 1) {
143 err = reset_control_assert(wgrp->rst);
144 if (err < 0) {
145 pr_err("failed to assert reset for window group %u\n",
146 wgrp->index);
147 }
148
149 host1x_client_suspend(wgrp->parent);
150 }
151
152 wgrp->usecount--;
153 mutex_unlock(&wgrp->lock);
154}
155
156int tegra_display_hub_prepare(struct tegra_display_hub *hub)
157{
158 unsigned int i;
159
160 /*
161 * XXX Enabling/disabling windowgroups needs to happen when the owner
162 * display controller is disabled. There's currently no good point at
163 * which this could be executed, so unconditionally enable all window
164 * groups for now.
165 */
166 for (i = 0; i < hub->soc->num_wgrps; i++) {
167 struct tegra_windowgroup *wgrp = &hub->wgrps[i];
168
169 /* Skip orphaned window group whose parent DC is disabled */
170 if (wgrp->parent)
171 tegra_windowgroup_enable(wgrp);
172 }
173
174 return 0;
175}
176
177void tegra_display_hub_cleanup(struct tegra_display_hub *hub)
178{
179 unsigned int i;
180
181 /*
182 * XXX Remove this once window groups can be more fine-grainedly
183 * enabled and disabled.
184 */
185 for (i = 0; i < hub->soc->num_wgrps; i++) {
186 struct tegra_windowgroup *wgrp = &hub->wgrps[i];
187
188 /* Skip orphaned window group whose parent DC is disabled */
189 if (wgrp->parent)
190 tegra_windowgroup_disable(wgrp);
191 }
192}
193
194static void tegra_shared_plane_update(struct tegra_plane *plane)
195{
196 struct tegra_dc *dc = plane->dc;
197 unsigned long timeout;
198 u32 mask, value;
199
200 mask = COMMON_UPDATE | WIN_A_UPDATE << plane->base.index;
201 tegra_dc_writel(dc, mask, DC_CMD_STATE_CONTROL);
202
203 timeout = jiffies + msecs_to_jiffies(1000);
204
205 while (time_before(jiffies, timeout)) {
206 value = tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
207 if ((value & mask) == 0)
208 break;
209
210 usleep_range(100, 400);
211 }
212}
213
214static void tegra_shared_plane_activate(struct tegra_plane *plane)
215{
216 struct tegra_dc *dc = plane->dc;
217 unsigned long timeout;
218 u32 mask, value;
219
220 mask = COMMON_ACTREQ | WIN_A_ACT_REQ << plane->base.index;
221 tegra_dc_writel(dc, mask, DC_CMD_STATE_CONTROL);
222
223 timeout = jiffies + msecs_to_jiffies(1000);
224
225 while (time_before(jiffies, timeout)) {
226 value = tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
227 if ((value & mask) == 0)
228 break;
229
230 usleep_range(100, 400);
231 }
232}
233
234static unsigned int
235tegra_shared_plane_get_owner(struct tegra_plane *plane, struct tegra_dc *dc)
236{
237 unsigned int offset =
238 tegra_plane_offset(plane, DC_WIN_CORE_WINDOWGROUP_SET_CONTROL);
239
240 return tegra_dc_readl(dc, offset) & OWNER_MASK;
241}
242
243static bool tegra_dc_owns_shared_plane(struct tegra_dc *dc,
244 struct tegra_plane *plane)
245{
246 struct device *dev = dc->dev;
247
248 if (tegra_shared_plane_get_owner(plane, dc) == dc->pipe) {
249 if (plane->dc == dc)
250 return true;
251
252 dev_WARN(dev, "head %u owns window %u but is not attached\n",
253 dc->pipe, plane->index);
254 }
255
256 return false;
257}
258
259static int tegra_shared_plane_set_owner(struct tegra_plane *plane,
260 struct tegra_dc *new)
261{
262 unsigned int offset =
263 tegra_plane_offset(plane, DC_WIN_CORE_WINDOWGROUP_SET_CONTROL);
264 struct tegra_dc *old = plane->dc, *dc = new ? new : old;
265 struct device *dev = new ? new->dev : old->dev;
266 unsigned int owner, index = plane->index;
267 u32 value;
268
269 value = tegra_dc_readl(dc, offset);
270 owner = value & OWNER_MASK;
271
272 if (new && (owner != OWNER_MASK && owner != new->pipe)) {
273 dev_WARN(dev, "window %u owned by head %u\n", index, owner);
274 return -EBUSY;
275 }
276
277 /*
278 * This seems to happen whenever the head has been disabled with one
279 * or more windows being active. This is harmless because we'll just
280 * reassign the window to the new head anyway.
281 */
282 if (old && owner == OWNER_MASK)
283 dev_dbg(dev, "window %u not owned by head %u but %u\n", index,
284 old->pipe, owner);
285
286 value &= ~OWNER_MASK;
287
288 if (new)
289 value |= OWNER(new->pipe);
290 else
291 value |= OWNER_MASK;
292
293 tegra_dc_writel(dc, value, offset);
294
295 plane->dc = new;
296
297 return 0;
298}
299
300static void tegra_shared_plane_setup_scaler(struct tegra_plane *plane)
301{
302 static const unsigned int coeffs[192] = {
303 0x00000000, 0x3c70e400, 0x3bb037e4, 0x0c51cc9c,
304 0x00100001, 0x3bf0dbfa, 0x3d00f406, 0x3fe003ff,
305 0x00300002, 0x3b80cbf5, 0x3da1040d, 0x3fb003fe,
306 0x00400002, 0x3b20bff1, 0x3e511015, 0x3f9003fc,
307 0x00500002, 0x3ad0b3ed, 0x3f21201d, 0x3f5003fb,
308 0x00500003, 0x3aa0a3e9, 0x3ff13026, 0x3f2007f9,
309 0x00500403, 0x3a7097e6, 0x00e1402f, 0x3ee007f7,
310 0x00500403, 0x3a608be4, 0x01d14c38, 0x3ea00bf6,
311 0x00500403, 0x3a507fe2, 0x02e15c42, 0x3e500ff4,
312 0x00500402, 0x3a6073e1, 0x03f16c4d, 0x3e000ff2,
313 0x00400402, 0x3a706be0, 0x05117858, 0x3db013f0,
314 0x00300402, 0x3a905fe0, 0x06318863, 0x3d6017ee,
315 0x00300402, 0x3ab057e0, 0x0771986e, 0x3d001beb,
316 0x00200001, 0x3af04fe1, 0x08a1a47a, 0x3cb023e9,
317 0x00100001, 0x3b2047e2, 0x09e1b485, 0x3c6027e7,
318 0x00100000, 0x3b703fe2, 0x0b11c091, 0x3c002fe6,
319 0x3f203800, 0x0391103f, 0x3ff0a014, 0x0811606c,
320 0x3f2037ff, 0x0351083c, 0x03e11842, 0x3f203c00,
321 0x3f302fff, 0x03010439, 0x04311c45, 0x3f104401,
322 0x3f302fff, 0x02c0fc35, 0x04812448, 0x3f104802,
323 0x3f4027ff, 0x0270f832, 0x04c1284b, 0x3f205003,
324 0x3f4023ff, 0x0230f030, 0x0511304e, 0x3f205403,
325 0x3f601fff, 0x01f0e82d, 0x05613451, 0x3f205c04,
326 0x3f701bfe, 0x01b0e02a, 0x05a13c54, 0x3f306006,
327 0x3f7017fe, 0x0170d827, 0x05f14057, 0x3f406807,
328 0x3f8017ff, 0x0140d424, 0x0641445a, 0x3f406c08,
329 0x3fa013ff, 0x0100cc22, 0x0681485d, 0x3f507409,
330 0x3fa00fff, 0x00d0c41f, 0x06d14c60, 0x3f607c0b,
331 0x3fc00fff, 0x0090bc1c, 0x07115063, 0x3f80840c,
332 0x3fd00bff, 0x0070b41a, 0x07515465, 0x3f908c0e,
333 0x3fe007ff, 0x0040b018, 0x07915868, 0x3fb0900f,
334 0x3ff00400, 0x0010a816, 0x07d15c6a, 0x3fd09811,
335 0x00a04c0e, 0x0460f442, 0x0240a827, 0x05c15859,
336 0x0090440d, 0x0440f040, 0x0480fc43, 0x00b05010,
337 0x0080400c, 0x0410ec3e, 0x04910044, 0x00d05411,
338 0x0070380b, 0x03f0e83d, 0x04b10846, 0x00e05812,
339 0x0060340a, 0x03d0e43b, 0x04d10c48, 0x00f06013,
340 0x00503009, 0x03b0e039, 0x04e11449, 0x01106415,
341 0x00402c08, 0x0390d838, 0x05011c4b, 0x01206c16,
342 0x00302807, 0x0370d436, 0x0511204c, 0x01407018,
343 0x00302406, 0x0340d034, 0x0531244e, 0x01507419,
344 0x00202005, 0x0320cc32, 0x05412c50, 0x01707c1b,
345 0x00101c04, 0x0300c431, 0x05613451, 0x0180801d,
346 0x00101803, 0x02e0c02f, 0x05713853, 0x01a0881e,
347 0x00101002, 0x02b0bc2d, 0x05814054, 0x01c08c20,
348 0x00000c02, 0x02a0b82c, 0x05914455, 0x01e09421,
349 0x00000801, 0x0280b02a, 0x05a14c57, 0x02009c23,
350 0x00000400, 0x0260ac28, 0x05b15458, 0x0220a025,
351 };
352 unsigned int ratio, row, column;
353
354 for (ratio = 0; ratio <= 2; ratio++) {
355 for (row = 0; row <= 15; row++) {
356 for (column = 0; column <= 3; column++) {
357 unsigned int index = (ratio << 6) + (row << 2) + column;
358 u32 value;
359
360 value = COEFF_INDEX(index) | COEFF_DATA(coeffs[index]);
361 tegra_plane_writel(plane, value,
362 DC_WIN_WINDOWGROUP_SET_INPUT_SCALER_COEFF);
363 }
364 }
365 }
366}
367
368static void tegra_dc_assign_shared_plane(struct tegra_dc *dc,
369 struct tegra_plane *plane)
370{
371 u32 value;
372 int err;
373
374 if (!tegra_dc_owns_shared_plane(dc, plane)) {
375 err = tegra_shared_plane_set_owner(plane, dc);
376 if (err < 0)
377 return;
378 }
379
380 value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_LINEBUF_CONFIG);
381 value |= MODE_FOUR_LINES;
382 tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_LINEBUF_CONFIG);
383
384 value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_WGRP_FETCH_METER);
385 value = SLOTS(1);
386 tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_WGRP_FETCH_METER);
387
388 /* disable watermark */
389 value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_WGRP_LATENCY_CTLA);
390 value &= ~LATENCY_CTL_MODE_ENABLE;
391 tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_WGRP_LATENCY_CTLA);
392
393 value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_WGRP_LATENCY_CTLB);
394 value |= WATERMARK_MASK;
395 tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_WGRP_LATENCY_CTLB);
396
397 /* pipe meter */
398 value = tegra_plane_readl(plane, DC_WIN_CORE_PRECOMP_WGRP_PIPE_METER);
399 value = PIPE_METER_INT(0) | PIPE_METER_FRAC(0);
400 tegra_plane_writel(plane, value, DC_WIN_CORE_PRECOMP_WGRP_PIPE_METER);
401
402 /* mempool entries */
403 value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_WGRP_POOL_CONFIG);
404 value = MEMPOOL_ENTRIES(0x331);
405 tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_WGRP_POOL_CONFIG);
406
407 value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_THREAD_GROUP);
408 value &= ~THREAD_NUM_MASK;
409 value |= THREAD_NUM(plane->base.index);
410 value |= THREAD_GROUP_ENABLE;
411 tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_THREAD_GROUP);
412
413 tegra_shared_plane_setup_scaler(plane);
414
415 tegra_shared_plane_update(plane);
416 tegra_shared_plane_activate(plane);
417}
418
419static void tegra_dc_remove_shared_plane(struct tegra_dc *dc,
420 struct tegra_plane *plane)
421{
422 tegra_shared_plane_set_owner(plane, NULL);
423}
424
425static int tegra_shared_plane_atomic_check(struct drm_plane *plane,
426 struct drm_atomic_state *state)
427{
428 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
429 plane);
430 struct tegra_plane_state *plane_state = to_tegra_plane_state(new_plane_state);
431 struct tegra_shared_plane *tegra = to_tegra_shared_plane(plane);
432 struct tegra_bo_tiling *tiling = &plane_state->tiling;
433 struct tegra_dc *dc = to_tegra_dc(new_plane_state->crtc);
434 int err;
435
436 /* no need for further checks if the plane is being disabled */
437 if (!new_plane_state->crtc || !new_plane_state->fb)
438 return 0;
439
440 err = tegra_plane_format(new_plane_state->fb->format->format,
441 &plane_state->format,
442 &plane_state->swap);
443 if (err < 0)
444 return err;
445
446 err = tegra_fb_get_tiling(new_plane_state->fb, tiling);
447 if (err < 0)
448 return err;
449
450 if (tiling->mode == TEGRA_BO_TILING_MODE_BLOCK &&
451 !dc->soc->supports_block_linear) {
452 DRM_ERROR("hardware doesn't support block linear mode\n");
453 return -EINVAL;
454 }
455
456 if (tiling->sector_layout == TEGRA_BO_SECTOR_LAYOUT_GPU &&
457 !dc->soc->supports_sector_layout) {
458 DRM_ERROR("hardware doesn't support GPU sector layout\n");
459 return -EINVAL;
460 }
461
462 /*
463 * Tegra doesn't support different strides for U and V planes so we
464 * error out if the user tries to display a framebuffer with such a
465 * configuration.
466 */
467 if (new_plane_state->fb->format->num_planes > 2) {
468 if (new_plane_state->fb->pitches[2] != new_plane_state->fb->pitches[1]) {
469 DRM_ERROR("unsupported UV-plane configuration\n");
470 return -EINVAL;
471 }
472 }
473
474 /* XXX scaling is not yet supported, add a check here */
475
476 err = tegra_plane_state_add(&tegra->base, new_plane_state);
477 if (err < 0)
478 return err;
479
480 return 0;
481}
482
483static void tegra_shared_plane_atomic_disable(struct drm_plane *plane,
484 struct drm_atomic_state *state)
485{
486 struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
487 plane);
488 struct tegra_plane *p = to_tegra_plane(plane);
489 struct tegra_dc *dc;
490 u32 value;
491 int err;
492
493 /* rien ne va plus */
494 if (!old_state || !old_state->crtc)
495 return;
496
497 dc = to_tegra_dc(old_state->crtc);
498
499 err = host1x_client_resume(&dc->client);
500 if (err < 0) {
501 dev_err(dc->dev, "failed to resume: %d\n", err);
502 return;
503 }
504
505 /*
506 * XXX Legacy helpers seem to sometimes call ->atomic_disable() even
507 * on planes that are already disabled. Make sure we fallback to the
508 * head for this particular state instead of crashing.
509 */
510 if (WARN_ON(p->dc == NULL))
511 p->dc = dc;
512
513 value = tegra_plane_readl(p, DC_WIN_WIN_OPTIONS);
514 value &= ~WIN_ENABLE;
515 tegra_plane_writel(p, value, DC_WIN_WIN_OPTIONS);
516
517 tegra_dc_remove_shared_plane(dc, p);
518
519 host1x_client_suspend(&dc->client);
520}
521
522static inline u32 compute_phase_incr(fixed20_12 in, unsigned int out)
523{
524 u64 tmp, tmp1, tmp2;
525
526 tmp = (u64)dfixed_trunc(in);
527 tmp2 = (u64)out;
528 tmp1 = (tmp << NFB) + (tmp2 >> 1);
529 do_div(tmp1, tmp2);
530
531 return lower_32_bits(tmp1);
532}
533
534static void tegra_shared_plane_atomic_update(struct drm_plane *plane,
535 struct drm_atomic_state *state)
536{
537 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
538 plane);
539 struct tegra_plane_state *tegra_plane_state = to_tegra_plane_state(new_state);
540 struct tegra_dc *dc = to_tegra_dc(new_state->crtc);
541 unsigned int zpos = new_state->normalized_zpos;
542 struct drm_framebuffer *fb = new_state->fb;
543 struct tegra_plane *p = to_tegra_plane(plane);
544 u32 value, min_width, bypass = 0;
545 dma_addr_t base, addr_flag = 0;
546 unsigned int bpc, planes;
547 bool yuv;
548 int err;
549
550 /* rien ne va plus */
551 if (!new_state->crtc || !new_state->fb)
552 return;
553
554 if (!new_state->visible) {
555 tegra_shared_plane_atomic_disable(plane, state);
556 return;
557 }
558
559 err = host1x_client_resume(&dc->client);
560 if (err < 0) {
561 dev_err(dc->dev, "failed to resume: %d\n", err);
562 return;
563 }
564
565 yuv = tegra_plane_format_is_yuv(tegra_plane_state->format, &planes, &bpc);
566
567 tegra_dc_assign_shared_plane(dc, p);
568
569 tegra_plane_writel(p, VCOUNTER, DC_WIN_CORE_ACT_CONTROL);
570
571 /* blending */
572 value = BLEND_FACTOR_DST_ALPHA_ZERO | BLEND_FACTOR_SRC_ALPHA_K2 |
573 BLEND_FACTOR_DST_COLOR_NEG_K1_TIMES_SRC |
574 BLEND_FACTOR_SRC_COLOR_K1_TIMES_SRC;
575 tegra_plane_writel(p, value, DC_WIN_BLEND_MATCH_SELECT);
576
577 value = BLEND_FACTOR_DST_ALPHA_ZERO | BLEND_FACTOR_SRC_ALPHA_K2 |
578 BLEND_FACTOR_DST_COLOR_NEG_K1_TIMES_SRC |
579 BLEND_FACTOR_SRC_COLOR_K1_TIMES_SRC;
580 tegra_plane_writel(p, value, DC_WIN_BLEND_NOMATCH_SELECT);
581
582 value = K2(255) | K1(255) | WINDOW_LAYER_DEPTH(255 - zpos);
583 tegra_plane_writel(p, value, DC_WIN_BLEND_LAYER_CONTROL);
584
585 /* scaling */
586 min_width = min(new_state->src_w >> 16, new_state->crtc_w);
587
588 value = tegra_plane_readl(p, DC_WINC_PRECOMP_WGRP_PIPE_CAPC);
589
590 if (min_width < MAX_PIXELS_5TAP444(value)) {
591 value = HORIZONTAL_TAPS_5 | VERTICAL_TAPS_5;
592 } else {
593 value = tegra_plane_readl(p, DC_WINC_PRECOMP_WGRP_PIPE_CAPE);
594
595 if (min_width < MAX_PIXELS_2TAP444(value))
596 value = HORIZONTAL_TAPS_2 | VERTICAL_TAPS_2;
597 else
598 dev_err(dc->dev, "invalid minimum width: %u\n", min_width);
599 }
600
601 value = HORIZONTAL_TAPS_5 | VERTICAL_TAPS_5;
602 tegra_plane_writel(p, value, DC_WIN_WINDOWGROUP_SET_CONTROL_INPUT_SCALER);
603
604 if (new_state->src_w != new_state->crtc_w << 16) {
605 fixed20_12 width = dfixed_init(new_state->src_w >> 16);
606 u32 incr = compute_phase_incr(width, new_state->crtc_w) & ~0x1;
607 u32 init = (1 << (NFB - 1)) + (incr >> 1);
608
609 tegra_plane_writel(p, incr, DC_WIN_SET_INPUT_SCALER_HPHASE_INCR);
610 tegra_plane_writel(p, init, DC_WIN_SET_INPUT_SCALER_H_START_PHASE);
611 } else {
612 bypass |= INPUT_SCALER_HBYPASS;
613 }
614
615 if (new_state->src_h != new_state->crtc_h << 16) {
616 fixed20_12 height = dfixed_init(new_state->src_h >> 16);
617 u32 incr = compute_phase_incr(height, new_state->crtc_h) & ~0x1;
618 u32 init = (1 << (NFB - 1)) + (incr >> 1);
619
620 tegra_plane_writel(p, incr, DC_WIN_SET_INPUT_SCALER_VPHASE_INCR);
621 tegra_plane_writel(p, init, DC_WIN_SET_INPUT_SCALER_V_START_PHASE);
622 } else {
623 bypass |= INPUT_SCALER_VBYPASS;
624 }
625
626 tegra_plane_writel(p, bypass, DC_WIN_WINDOWGROUP_SET_INPUT_SCALER_USAGE);
627
628 /* disable compression */
629 tegra_plane_writel(p, 0, DC_WINBUF_CDE_CONTROL);
630
631#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
632 /*
633 * Physical address bit 39 in Tegra194 is used as a switch for special
634 * logic that swizzles the memory using either the legacy Tegra or the
635 * dGPU sector layout.
636 */
637 if (tegra_plane_state->tiling.sector_layout == TEGRA_BO_SECTOR_LAYOUT_GPU)
638 addr_flag = BIT_ULL(39);
639#endif
640
641 base = tegra_plane_state->iova[0] + fb->offsets[0];
642 base |= addr_flag;
643
644 tegra_plane_writel(p, tegra_plane_state->format, DC_WIN_COLOR_DEPTH);
645 tegra_plane_writel(p, 0, DC_WIN_PRECOMP_WGRP_PARAMS);
646
647 value = V_POSITION(new_state->crtc_y) |
648 H_POSITION(new_state->crtc_x);
649 tegra_plane_writel(p, value, DC_WIN_POSITION);
650
651 value = V_SIZE(new_state->crtc_h) | H_SIZE(new_state->crtc_w);
652 tegra_plane_writel(p, value, DC_WIN_SIZE);
653
654 value = WIN_ENABLE | COLOR_EXPAND;
655 tegra_plane_writel(p, value, DC_WIN_WIN_OPTIONS);
656
657 value = V_SIZE(new_state->src_h >> 16) | H_SIZE(new_state->src_w >> 16);
658 tegra_plane_writel(p, value, DC_WIN_CROPPED_SIZE);
659
660 tegra_plane_writel(p, upper_32_bits(base), DC_WINBUF_START_ADDR_HI);
661 tegra_plane_writel(p, lower_32_bits(base), DC_WINBUF_START_ADDR);
662
663 value = PITCH(fb->pitches[0]);
664 tegra_plane_writel(p, value, DC_WIN_PLANAR_STORAGE);
665
666 if (yuv && planes > 1) {
667 base = tegra_plane_state->iova[1] + fb->offsets[1];
668 base |= addr_flag;
669
670 tegra_plane_writel(p, upper_32_bits(base), DC_WINBUF_START_ADDR_HI_U);
671 tegra_plane_writel(p, lower_32_bits(base), DC_WINBUF_START_ADDR_U);
672
673 if (planes > 2) {
674 base = tegra_plane_state->iova[2] + fb->offsets[2];
675 base |= addr_flag;
676
677 tegra_plane_writel(p, upper_32_bits(base), DC_WINBUF_START_ADDR_HI_V);
678 tegra_plane_writel(p, lower_32_bits(base), DC_WINBUF_START_ADDR_V);
679 }
680
681 value = PITCH_U(fb->pitches[1]);
682
683 if (planes > 2)
684 value |= PITCH_V(fb->pitches[2]);
685
686 tegra_plane_writel(p, value, DC_WIN_PLANAR_STORAGE_UV);
687 } else {
688 tegra_plane_writel(p, 0, DC_WINBUF_START_ADDR_U);
689 tegra_plane_writel(p, 0, DC_WINBUF_START_ADDR_HI_U);
690 tegra_plane_writel(p, 0, DC_WINBUF_START_ADDR_V);
691 tegra_plane_writel(p, 0, DC_WINBUF_START_ADDR_HI_V);
692 tegra_plane_writel(p, 0, DC_WIN_PLANAR_STORAGE_UV);
693 }
694
695 value = CLAMP_BEFORE_BLEND | INPUT_RANGE_FULL;
696
697 if (yuv) {
698 if (bpc < 12)
699 value |= DEGAMMA_YUV8_10;
700 else
701 value |= DEGAMMA_YUV12;
702
703 /* XXX parameterize */
704 value |= COLOR_SPACE_YUV_2020;
705 } else {
706 if (!tegra_plane_format_is_indexed(tegra_plane_state->format))
707 value |= DEGAMMA_SRGB;
708 }
709
710 tegra_plane_writel(p, value, DC_WIN_SET_PARAMS);
711
712 value = OFFSET_X(new_state->src_y >> 16) |
713 OFFSET_Y(new_state->src_x >> 16);
714 tegra_plane_writel(p, value, DC_WINBUF_CROPPED_POINT);
715
716 if (dc->soc->supports_block_linear) {
717 unsigned long height = tegra_plane_state->tiling.value;
718
719 /* XXX */
720 switch (tegra_plane_state->tiling.mode) {
721 case TEGRA_BO_TILING_MODE_PITCH:
722 value = DC_WINBUF_SURFACE_KIND_BLOCK_HEIGHT(0) |
723 DC_WINBUF_SURFACE_KIND_PITCH;
724 break;
725
726 /* XXX not supported on Tegra186 and later */
727 case TEGRA_BO_TILING_MODE_TILED:
728 value = DC_WINBUF_SURFACE_KIND_TILED;
729 break;
730
731 case TEGRA_BO_TILING_MODE_BLOCK:
732 value = DC_WINBUF_SURFACE_KIND_BLOCK_HEIGHT(height) |
733 DC_WINBUF_SURFACE_KIND_BLOCK;
734 break;
735 }
736
737 tegra_plane_writel(p, value, DC_WINBUF_SURFACE_KIND);
738 }
739
740 /* disable gamut CSC */
741 value = tegra_plane_readl(p, DC_WIN_WINDOW_SET_CONTROL);
742 value &= ~CONTROL_CSC_ENABLE;
743 tegra_plane_writel(p, value, DC_WIN_WINDOW_SET_CONTROL);
744
745 host1x_client_suspend(&dc->client);
746}
747
748static const struct drm_plane_helper_funcs tegra_shared_plane_helper_funcs = {
749 .prepare_fb = tegra_plane_prepare_fb,
750 .cleanup_fb = tegra_plane_cleanup_fb,
751 .atomic_check = tegra_shared_plane_atomic_check,
752 .atomic_update = tegra_shared_plane_atomic_update,
753 .atomic_disable = tegra_shared_plane_atomic_disable,
754};
755
756struct drm_plane *tegra_shared_plane_create(struct drm_device *drm,
757 struct tegra_dc *dc,
758 unsigned int wgrp,
759 unsigned int index)
760{
761 enum drm_plane_type type = DRM_PLANE_TYPE_OVERLAY;
762 struct tegra_drm *tegra = drm->dev_private;
763 struct tegra_display_hub *hub = tegra->hub;
764 struct tegra_shared_plane *plane;
765 unsigned int possible_crtcs;
766 unsigned int num_formats;
767 const u64 *modifiers;
768 struct drm_plane *p;
769 const u32 *formats;
770 int err;
771
772 plane = kzalloc(sizeof(*plane), GFP_KERNEL);
773 if (!plane)
774 return ERR_PTR(-ENOMEM);
775
776 plane->base.offset = 0x0a00 + 0x0300 * index;
777 plane->base.index = index;
778
779 plane->wgrp = &hub->wgrps[wgrp];
780 plane->wgrp->parent = &dc->client;
781
782 p = &plane->base.base;
783
784 /* planes can be assigned to arbitrary CRTCs */
785 possible_crtcs = BIT(tegra->num_crtcs) - 1;
786
787 num_formats = ARRAY_SIZE(tegra_shared_plane_formats);
788 formats = tegra_shared_plane_formats;
789 modifiers = tegra_shared_plane_modifiers;
790
791 err = drm_universal_plane_init(drm, p, possible_crtcs,
792 &tegra_plane_funcs, formats,
793 num_formats, modifiers, type, NULL);
794 if (err < 0) {
795 kfree(plane);
796 return ERR_PTR(err);
797 }
798
799 drm_plane_helper_add(p, &tegra_shared_plane_helper_funcs);
800 drm_plane_create_zpos_property(p, 0, 0, 255);
801
802 return p;
803}
804
805static struct drm_private_state *
806tegra_display_hub_duplicate_state(struct drm_private_obj *obj)
807{
808 struct tegra_display_hub_state *state;
809
810 state = kmemdup(obj->state, sizeof(*state), GFP_KERNEL);
811 if (!state)
812 return NULL;
813
814 __drm_atomic_helper_private_obj_duplicate_state(obj, &state->base);
815
816 return &state->base;
817}
818
819static void tegra_display_hub_destroy_state(struct drm_private_obj *obj,
820 struct drm_private_state *state)
821{
822 struct tegra_display_hub_state *hub_state =
823 to_tegra_display_hub_state(state);
824
825 kfree(hub_state);
826}
827
828static const struct drm_private_state_funcs tegra_display_hub_state_funcs = {
829 .atomic_duplicate_state = tegra_display_hub_duplicate_state,
830 .atomic_destroy_state = tegra_display_hub_destroy_state,
831};
832
833static struct tegra_display_hub_state *
834tegra_display_hub_get_state(struct tegra_display_hub *hub,
835 struct drm_atomic_state *state)
836{
837 struct drm_private_state *priv;
838
839 priv = drm_atomic_get_private_obj_state(state, &hub->base);
840 if (IS_ERR(priv))
841 return ERR_CAST(priv);
842
843 return to_tegra_display_hub_state(priv);
844}
845
846int tegra_display_hub_atomic_check(struct drm_device *drm,
847 struct drm_atomic_state *state)
848{
849 struct tegra_drm *tegra = drm->dev_private;
850 struct tegra_display_hub_state *hub_state;
851 struct drm_crtc_state *old, *new;
852 struct drm_crtc *crtc;
853 unsigned int i;
854
855 if (!tegra->hub)
856 return 0;
857
858 hub_state = tegra_display_hub_get_state(tegra->hub, state);
859 if (IS_ERR(hub_state))
860 return PTR_ERR(hub_state);
861
862 /*
863 * The display hub display clock needs to be fed by the display clock
864 * with the highest frequency to ensure proper functioning of all the
865 * displays.
866 *
867 * Note that this isn't used before Tegra186, but it doesn't hurt and
868 * conditionalizing it would make the code less clean.
869 */
870 for_each_oldnew_crtc_in_state(state, crtc, old, new, i) {
871 struct tegra_dc_state *dc = to_dc_state(new);
872
873 if (new->active) {
874 if (!hub_state->clk || dc->pclk > hub_state->rate) {
875 hub_state->dc = to_tegra_dc(dc->base.crtc);
876 hub_state->clk = hub_state->dc->clk;
877 hub_state->rate = dc->pclk;
878 }
879 }
880 }
881
882 return 0;
883}
884
885static void tegra_display_hub_update(struct tegra_dc *dc)
886{
887 u32 value;
888 int err;
889
890 err = host1x_client_resume(&dc->client);
891 if (err < 0) {
892 dev_err(dc->dev, "failed to resume: %d\n", err);
893 return;
894 }
895
896 value = tegra_dc_readl(dc, DC_CMD_IHUB_COMMON_MISC_CTL);
897 value &= ~LATENCY_EVENT;
898 tegra_dc_writel(dc, value, DC_CMD_IHUB_COMMON_MISC_CTL);
899
900 value = tegra_dc_readl(dc, DC_DISP_IHUB_COMMON_DISPLAY_FETCH_METER);
901 value = CURS_SLOTS(1) | WGRP_SLOTS(1);
902 tegra_dc_writel(dc, value, DC_DISP_IHUB_COMMON_DISPLAY_FETCH_METER);
903
904 tegra_dc_writel(dc, COMMON_UPDATE, DC_CMD_STATE_CONTROL);
905 tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
906 tegra_dc_writel(dc, COMMON_ACTREQ, DC_CMD_STATE_CONTROL);
907 tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
908
909 host1x_client_suspend(&dc->client);
910}
911
912void tegra_display_hub_atomic_commit(struct drm_device *drm,
913 struct drm_atomic_state *state)
914{
915 struct tegra_drm *tegra = drm->dev_private;
916 struct tegra_display_hub *hub = tegra->hub;
917 struct tegra_display_hub_state *hub_state;
918 struct device *dev = hub->client.dev;
919 int err;
920
921 hub_state = to_tegra_display_hub_state(hub->base.state);
922
923 if (hub_state->clk) {
924 err = clk_set_rate(hub_state->clk, hub_state->rate);
925 if (err < 0)
926 dev_err(dev, "failed to set rate of %pC to %lu Hz\n",
927 hub_state->clk, hub_state->rate);
928
929 err = clk_set_parent(hub->clk_disp, hub_state->clk);
930 if (err < 0)
931 dev_err(dev, "failed to set parent of %pC to %pC: %d\n",
932 hub->clk_disp, hub_state->clk, err);
933 }
934
935 if (hub_state->dc)
936 tegra_display_hub_update(hub_state->dc);
937}
938
939static int tegra_display_hub_init(struct host1x_client *client)
940{
941 struct tegra_display_hub *hub = to_tegra_display_hub(client);
942 struct drm_device *drm = dev_get_drvdata(client->host);
943 struct tegra_drm *tegra = drm->dev_private;
944 struct tegra_display_hub_state *state;
945
946 state = kzalloc(sizeof(*state), GFP_KERNEL);
947 if (!state)
948 return -ENOMEM;
949
950 drm_atomic_private_obj_init(drm, &hub->base, &state->base,
951 &tegra_display_hub_state_funcs);
952
953 tegra->hub = hub;
954
955 return 0;
956}
957
958static int tegra_display_hub_exit(struct host1x_client *client)
959{
960 struct drm_device *drm = dev_get_drvdata(client->host);
961 struct tegra_drm *tegra = drm->dev_private;
962
963 drm_atomic_private_obj_fini(&tegra->hub->base);
964 tegra->hub = NULL;
965
966 return 0;
967}
968
969static int tegra_display_hub_runtime_suspend(struct host1x_client *client)
970{
971 struct tegra_display_hub *hub = to_tegra_display_hub(client);
972 struct device *dev = client->dev;
973 unsigned int i = hub->num_heads;
974 int err;
975
976 err = reset_control_assert(hub->rst);
977 if (err < 0)
978 return err;
979
980 while (i--)
981 clk_disable_unprepare(hub->clk_heads[i]);
982
983 clk_disable_unprepare(hub->clk_hub);
984 clk_disable_unprepare(hub->clk_dsc);
985 clk_disable_unprepare(hub->clk_disp);
986
987 pm_runtime_put_sync(dev);
988
989 return 0;
990}
991
992static int tegra_display_hub_runtime_resume(struct host1x_client *client)
993{
994 struct tegra_display_hub *hub = to_tegra_display_hub(client);
995 struct device *dev = client->dev;
996 unsigned int i;
997 int err;
998
999 err = pm_runtime_resume_and_get(dev);
1000 if (err < 0) {
1001 dev_err(dev, "failed to get runtime PM: %d\n", err);
1002 return err;
1003 }
1004
1005 err = clk_prepare_enable(hub->clk_disp);
1006 if (err < 0)
1007 goto put_rpm;
1008
1009 err = clk_prepare_enable(hub->clk_dsc);
1010 if (err < 0)
1011 goto disable_disp;
1012
1013 err = clk_prepare_enable(hub->clk_hub);
1014 if (err < 0)
1015 goto disable_dsc;
1016
1017 for (i = 0; i < hub->num_heads; i++) {
1018 err = clk_prepare_enable(hub->clk_heads[i]);
1019 if (err < 0)
1020 goto disable_heads;
1021 }
1022
1023 err = reset_control_deassert(hub->rst);
1024 if (err < 0)
1025 goto disable_heads;
1026
1027 return 0;
1028
1029disable_heads:
1030 while (i--)
1031 clk_disable_unprepare(hub->clk_heads[i]);
1032
1033 clk_disable_unprepare(hub->clk_hub);
1034disable_dsc:
1035 clk_disable_unprepare(hub->clk_dsc);
1036disable_disp:
1037 clk_disable_unprepare(hub->clk_disp);
1038put_rpm:
1039 pm_runtime_put_sync(dev);
1040 return err;
1041}
1042
1043static const struct host1x_client_ops tegra_display_hub_ops = {
1044 .init = tegra_display_hub_init,
1045 .exit = tegra_display_hub_exit,
1046 .suspend = tegra_display_hub_runtime_suspend,
1047 .resume = tegra_display_hub_runtime_resume,
1048};
1049
1050static int tegra_display_hub_probe(struct platform_device *pdev)
1051{
1052 u64 dma_mask = dma_get_mask(pdev->dev.parent);
1053 struct device_node *child = NULL;
1054 struct tegra_display_hub *hub;
1055 struct clk *clk;
1056 unsigned int i;
1057 int err;
1058
1059 err = dma_coerce_mask_and_coherent(&pdev->dev, dma_mask);
1060 if (err < 0) {
1061 dev_err(&pdev->dev, "failed to set DMA mask: %d\n", err);
1062 return err;
1063 }
1064
1065 hub = devm_kzalloc(&pdev->dev, sizeof(*hub), GFP_KERNEL);
1066 if (!hub)
1067 return -ENOMEM;
1068
1069 hub->soc = of_device_get_match_data(&pdev->dev);
1070
1071 hub->clk_disp = devm_clk_get(&pdev->dev, "disp");
1072 if (IS_ERR(hub->clk_disp)) {
1073 err = PTR_ERR(hub->clk_disp);
1074 return err;
1075 }
1076
1077 if (hub->soc->supports_dsc) {
1078 hub->clk_dsc = devm_clk_get(&pdev->dev, "dsc");
1079 if (IS_ERR(hub->clk_dsc)) {
1080 err = PTR_ERR(hub->clk_dsc);
1081 return err;
1082 }
1083 }
1084
1085 hub->clk_hub = devm_clk_get(&pdev->dev, "hub");
1086 if (IS_ERR(hub->clk_hub)) {
1087 err = PTR_ERR(hub->clk_hub);
1088 return err;
1089 }
1090
1091 hub->rst = devm_reset_control_get(&pdev->dev, "misc");
1092 if (IS_ERR(hub->rst)) {
1093 err = PTR_ERR(hub->rst);
1094 return err;
1095 }
1096
1097 hub->wgrps = devm_kcalloc(&pdev->dev, hub->soc->num_wgrps,
1098 sizeof(*hub->wgrps), GFP_KERNEL);
1099 if (!hub->wgrps)
1100 return -ENOMEM;
1101
1102 for (i = 0; i < hub->soc->num_wgrps; i++) {
1103 struct tegra_windowgroup *wgrp = &hub->wgrps[i];
1104 char id[16];
1105
1106 snprintf(id, sizeof(id), "wgrp%u", i);
1107 mutex_init(&wgrp->lock);
1108 wgrp->usecount = 0;
1109 wgrp->index = i;
1110
1111 wgrp->rst = devm_reset_control_get(&pdev->dev, id);
1112 if (IS_ERR(wgrp->rst))
1113 return PTR_ERR(wgrp->rst);
1114
1115 err = reset_control_assert(wgrp->rst);
1116 if (err < 0)
1117 return err;
1118 }
1119
1120 hub->num_heads = of_get_child_count(pdev->dev.of_node);
1121
1122 hub->clk_heads = devm_kcalloc(&pdev->dev, hub->num_heads, sizeof(clk),
1123 GFP_KERNEL);
1124 if (!hub->clk_heads)
1125 return -ENOMEM;
1126
1127 for (i = 0; i < hub->num_heads; i++) {
1128 child = of_get_next_child(pdev->dev.of_node, child);
1129 if (!child) {
1130 dev_err(&pdev->dev, "failed to find node for head %u\n",
1131 i);
1132 return -ENODEV;
1133 }
1134
1135 clk = devm_get_clk_from_child(&pdev->dev, child, "dc");
1136 if (IS_ERR(clk)) {
1137 dev_err(&pdev->dev, "failed to get clock for head %u\n",
1138 i);
1139 of_node_put(child);
1140 return PTR_ERR(clk);
1141 }
1142
1143 hub->clk_heads[i] = clk;
1144 }
1145
1146 of_node_put(child);
1147
1148 /* XXX: enable clock across reset? */
1149 err = reset_control_assert(hub->rst);
1150 if (err < 0)
1151 return err;
1152
1153 platform_set_drvdata(pdev, hub);
1154 pm_runtime_enable(&pdev->dev);
1155
1156 INIT_LIST_HEAD(&hub->client.list);
1157 hub->client.ops = &tegra_display_hub_ops;
1158 hub->client.dev = &pdev->dev;
1159
1160 err = host1x_client_register(&hub->client);
1161 if (err < 0)
1162 dev_err(&pdev->dev, "failed to register host1x client: %d\n",
1163 err);
1164
1165 err = devm_of_platform_populate(&pdev->dev);
1166 if (err < 0)
1167 goto unregister;
1168
1169 return err;
1170
1171unregister:
1172 host1x_client_unregister(&hub->client);
1173 pm_runtime_disable(&pdev->dev);
1174 return err;
1175}
1176
1177static void tegra_display_hub_remove(struct platform_device *pdev)
1178{
1179 struct tegra_display_hub *hub = platform_get_drvdata(pdev);
1180 unsigned int i;
1181
1182 host1x_client_unregister(&hub->client);
1183
1184 for (i = 0; i < hub->soc->num_wgrps; i++) {
1185 struct tegra_windowgroup *wgrp = &hub->wgrps[i];
1186
1187 mutex_destroy(&wgrp->lock);
1188 }
1189
1190 pm_runtime_disable(&pdev->dev);
1191}
1192
1193static const struct tegra_display_hub_soc tegra186_display_hub = {
1194 .num_wgrps = 6,
1195 .supports_dsc = true,
1196};
1197
1198static const struct tegra_display_hub_soc tegra194_display_hub = {
1199 .num_wgrps = 6,
1200 .supports_dsc = false,
1201};
1202
1203static const struct of_device_id tegra_display_hub_of_match[] = {
1204 {
1205 .compatible = "nvidia,tegra194-display",
1206 .data = &tegra194_display_hub
1207 }, {
1208 .compatible = "nvidia,tegra186-display",
1209 .data = &tegra186_display_hub
1210 }, {
1211 /* sentinel */
1212 }
1213};
1214MODULE_DEVICE_TABLE(of, tegra_display_hub_of_match);
1215
1216struct platform_driver tegra_display_hub_driver = {
1217 .driver = {
1218 .name = "tegra-display-hub",
1219 .of_match_table = tegra_display_hub_of_match,
1220 },
1221 .probe = tegra_display_hub_probe,
1222 .remove_new = tegra_display_hub_remove,
1223};