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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
26static const u32 tegra_shared_plane_formats[] = {
27 DRM_FORMAT_ARGB1555,
28 DRM_FORMAT_RGB565,
29 DRM_FORMAT_RGBA5551,
30 DRM_FORMAT_ARGB8888,
31 DRM_FORMAT_ABGR8888,
32 /* new on Tegra114 */
33 DRM_FORMAT_ABGR4444,
34 DRM_FORMAT_ABGR1555,
35 DRM_FORMAT_BGRA5551,
36 DRM_FORMAT_XRGB1555,
37 DRM_FORMAT_RGBX5551,
38 DRM_FORMAT_XBGR1555,
39 DRM_FORMAT_BGRX5551,
40 DRM_FORMAT_BGR565,
41 DRM_FORMAT_XRGB8888,
42 DRM_FORMAT_XBGR8888,
43 /* planar formats */
44 DRM_FORMAT_UYVY,
45 DRM_FORMAT_YUYV,
46 DRM_FORMAT_YUV420,
47 DRM_FORMAT_YUV422,
48};
49
50static const u64 tegra_shared_plane_modifiers[] = {
51 DRM_FORMAT_MOD_LINEAR,
52 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0),
53 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1),
54 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2),
55 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(3),
56 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(4),
57 DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(5),
58 DRM_FORMAT_MOD_INVALID
59};
60
61static inline unsigned int tegra_plane_offset(struct tegra_plane *plane,
62 unsigned int offset)
63{
64 if (offset >= 0x500 && offset <= 0x581) {
65 offset = 0x000 + (offset - 0x500);
66 return plane->offset + offset;
67 }
68
69 if (offset >= 0x700 && offset <= 0x73c) {
70 offset = 0x180 + (offset - 0x700);
71 return plane->offset + offset;
72 }
73
74 if (offset >= 0x800 && offset <= 0x83e) {
75 offset = 0x1c0 + (offset - 0x800);
76 return plane->offset + offset;
77 }
78
79 dev_WARN(plane->dc->dev, "invalid offset: %x\n", offset);
80
81 return plane->offset + offset;
82}
83
84static inline u32 tegra_plane_readl(struct tegra_plane *plane,
85 unsigned int offset)
86{
87 return tegra_dc_readl(plane->dc, tegra_plane_offset(plane, offset));
88}
89
90static inline void tegra_plane_writel(struct tegra_plane *plane, u32 value,
91 unsigned int offset)
92{
93 tegra_dc_writel(plane->dc, value, tegra_plane_offset(plane, offset));
94}
95
96static int tegra_windowgroup_enable(struct tegra_windowgroup *wgrp)
97{
98 mutex_lock(&wgrp->lock);
99
100 if (wgrp->usecount == 0) {
101 pm_runtime_get_sync(wgrp->parent);
102 reset_control_deassert(wgrp->rst);
103 }
104
105 wgrp->usecount++;
106 mutex_unlock(&wgrp->lock);
107
108 return 0;
109}
110
111static void tegra_windowgroup_disable(struct tegra_windowgroup *wgrp)
112{
113 int err;
114
115 mutex_lock(&wgrp->lock);
116
117 if (wgrp->usecount == 1) {
118 err = reset_control_assert(wgrp->rst);
119 if (err < 0) {
120 pr_err("failed to assert reset for window group %u\n",
121 wgrp->index);
122 }
123
124 pm_runtime_put(wgrp->parent);
125 }
126
127 wgrp->usecount--;
128 mutex_unlock(&wgrp->lock);
129}
130
131int tegra_display_hub_prepare(struct tegra_display_hub *hub)
132{
133 unsigned int i;
134
135 /*
136 * XXX Enabling/disabling windowgroups needs to happen when the owner
137 * display controller is disabled. There's currently no good point at
138 * which this could be executed, so unconditionally enable all window
139 * groups for now.
140 */
141 for (i = 0; i < hub->soc->num_wgrps; i++) {
142 struct tegra_windowgroup *wgrp = &hub->wgrps[i];
143
144 tegra_windowgroup_enable(wgrp);
145 }
146
147 return 0;
148}
149
150void tegra_display_hub_cleanup(struct tegra_display_hub *hub)
151{
152 unsigned int i;
153
154 /*
155 * XXX Remove this once window groups can be more fine-grainedly
156 * enabled and disabled.
157 */
158 for (i = 0; i < hub->soc->num_wgrps; i++) {
159 struct tegra_windowgroup *wgrp = &hub->wgrps[i];
160
161 tegra_windowgroup_disable(wgrp);
162 }
163}
164
165static void tegra_shared_plane_update(struct tegra_plane *plane)
166{
167 struct tegra_dc *dc = plane->dc;
168 unsigned long timeout;
169 u32 mask, value;
170
171 mask = COMMON_UPDATE | WIN_A_UPDATE << plane->base.index;
172 tegra_dc_writel(dc, mask, DC_CMD_STATE_CONTROL);
173
174 timeout = jiffies + msecs_to_jiffies(1000);
175
176 while (time_before(jiffies, timeout)) {
177 value = tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
178 if ((value & mask) == 0)
179 break;
180
181 usleep_range(100, 400);
182 }
183}
184
185static void tegra_shared_plane_activate(struct tegra_plane *plane)
186{
187 struct tegra_dc *dc = plane->dc;
188 unsigned long timeout;
189 u32 mask, value;
190
191 mask = COMMON_ACTREQ | WIN_A_ACT_REQ << plane->base.index;
192 tegra_dc_writel(dc, mask, DC_CMD_STATE_CONTROL);
193
194 timeout = jiffies + msecs_to_jiffies(1000);
195
196 while (time_before(jiffies, timeout)) {
197 value = tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
198 if ((value & mask) == 0)
199 break;
200
201 usleep_range(100, 400);
202 }
203}
204
205static unsigned int
206tegra_shared_plane_get_owner(struct tegra_plane *plane, struct tegra_dc *dc)
207{
208 unsigned int offset =
209 tegra_plane_offset(plane, DC_WIN_CORE_WINDOWGROUP_SET_CONTROL);
210
211 return tegra_dc_readl(dc, offset) & OWNER_MASK;
212}
213
214static bool tegra_dc_owns_shared_plane(struct tegra_dc *dc,
215 struct tegra_plane *plane)
216{
217 struct device *dev = dc->dev;
218
219 if (tegra_shared_plane_get_owner(plane, dc) == dc->pipe) {
220 if (plane->dc == dc)
221 return true;
222
223 dev_WARN(dev, "head %u owns window %u but is not attached\n",
224 dc->pipe, plane->index);
225 }
226
227 return false;
228}
229
230static int tegra_shared_plane_set_owner(struct tegra_plane *plane,
231 struct tegra_dc *new)
232{
233 unsigned int offset =
234 tegra_plane_offset(plane, DC_WIN_CORE_WINDOWGROUP_SET_CONTROL);
235 struct tegra_dc *old = plane->dc, *dc = new ? new : old;
236 struct device *dev = new ? new->dev : old->dev;
237 unsigned int owner, index = plane->index;
238 u32 value;
239
240 value = tegra_dc_readl(dc, offset);
241 owner = value & OWNER_MASK;
242
243 if (new && (owner != OWNER_MASK && owner != new->pipe)) {
244 dev_WARN(dev, "window %u owned by head %u\n", index, owner);
245 return -EBUSY;
246 }
247
248 /*
249 * This seems to happen whenever the head has been disabled with one
250 * or more windows being active. This is harmless because we'll just
251 * reassign the window to the new head anyway.
252 */
253 if (old && owner == OWNER_MASK)
254 dev_dbg(dev, "window %u not owned by head %u but %u\n", index,
255 old->pipe, owner);
256
257 value &= ~OWNER_MASK;
258
259 if (new)
260 value |= OWNER(new->pipe);
261 else
262 value |= OWNER_MASK;
263
264 tegra_dc_writel(dc, value, offset);
265
266 plane->dc = new;
267
268 return 0;
269}
270
271static void tegra_dc_assign_shared_plane(struct tegra_dc *dc,
272 struct tegra_plane *plane)
273{
274 u32 value;
275 int err;
276
277 if (!tegra_dc_owns_shared_plane(dc, plane)) {
278 err = tegra_shared_plane_set_owner(plane, dc);
279 if (err < 0)
280 return;
281 }
282
283 value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_LINEBUF_CONFIG);
284 value |= MODE_FOUR_LINES;
285 tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_LINEBUF_CONFIG);
286
287 value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_WGRP_FETCH_METER);
288 value = SLOTS(1);
289 tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_WGRP_FETCH_METER);
290
291 /* disable watermark */
292 value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_WGRP_LATENCY_CTLA);
293 value &= ~LATENCY_CTL_MODE_ENABLE;
294 tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_WGRP_LATENCY_CTLA);
295
296 value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_WGRP_LATENCY_CTLB);
297 value |= WATERMARK_MASK;
298 tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_WGRP_LATENCY_CTLB);
299
300 /* pipe meter */
301 value = tegra_plane_readl(plane, DC_WIN_CORE_PRECOMP_WGRP_PIPE_METER);
302 value = PIPE_METER_INT(0) | PIPE_METER_FRAC(0);
303 tegra_plane_writel(plane, value, DC_WIN_CORE_PRECOMP_WGRP_PIPE_METER);
304
305 /* mempool entries */
306 value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_WGRP_POOL_CONFIG);
307 value = MEMPOOL_ENTRIES(0x331);
308 tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_WGRP_POOL_CONFIG);
309
310 value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_THREAD_GROUP);
311 value &= ~THREAD_NUM_MASK;
312 value |= THREAD_NUM(plane->base.index);
313 value |= THREAD_GROUP_ENABLE;
314 tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_THREAD_GROUP);
315
316 tegra_shared_plane_update(plane);
317 tegra_shared_plane_activate(plane);
318}
319
320static void tegra_dc_remove_shared_plane(struct tegra_dc *dc,
321 struct tegra_plane *plane)
322{
323 tegra_shared_plane_set_owner(plane, NULL);
324}
325
326static int tegra_shared_plane_atomic_check(struct drm_plane *plane,
327 struct drm_plane_state *state)
328{
329 struct tegra_plane_state *plane_state = to_tegra_plane_state(state);
330 struct tegra_shared_plane *tegra = to_tegra_shared_plane(plane);
331 struct tegra_bo_tiling *tiling = &plane_state->tiling;
332 struct tegra_dc *dc = to_tegra_dc(state->crtc);
333 int err;
334
335 /* no need for further checks if the plane is being disabled */
336 if (!state->crtc || !state->fb)
337 return 0;
338
339 err = tegra_plane_format(state->fb->format->format,
340 &plane_state->format,
341 &plane_state->swap);
342 if (err < 0)
343 return err;
344
345 err = tegra_fb_get_tiling(state->fb, tiling);
346 if (err < 0)
347 return err;
348
349 if (tiling->mode == TEGRA_BO_TILING_MODE_BLOCK &&
350 !dc->soc->supports_block_linear) {
351 DRM_ERROR("hardware doesn't support block linear mode\n");
352 return -EINVAL;
353 }
354
355 /*
356 * Tegra doesn't support different strides for U and V planes so we
357 * error out if the user tries to display a framebuffer with such a
358 * configuration.
359 */
360 if (state->fb->format->num_planes > 2) {
361 if (state->fb->pitches[2] != state->fb->pitches[1]) {
362 DRM_ERROR("unsupported UV-plane configuration\n");
363 return -EINVAL;
364 }
365 }
366
367 /* XXX scaling is not yet supported, add a check here */
368
369 err = tegra_plane_state_add(&tegra->base, state);
370 if (err < 0)
371 return err;
372
373 return 0;
374}
375
376static void tegra_shared_plane_atomic_disable(struct drm_plane *plane,
377 struct drm_plane_state *old_state)
378{
379 struct tegra_plane *p = to_tegra_plane(plane);
380 struct tegra_dc *dc;
381 u32 value;
382
383 /* rien ne va plus */
384 if (!old_state || !old_state->crtc)
385 return;
386
387 dc = to_tegra_dc(old_state->crtc);
388
389 /*
390 * XXX Legacy helpers seem to sometimes call ->atomic_disable() even
391 * on planes that are already disabled. Make sure we fallback to the
392 * head for this particular state instead of crashing.
393 */
394 if (WARN_ON(p->dc == NULL))
395 p->dc = dc;
396
397 pm_runtime_get_sync(dc->dev);
398
399 value = tegra_plane_readl(p, DC_WIN_WIN_OPTIONS);
400 value &= ~WIN_ENABLE;
401 tegra_plane_writel(p, value, DC_WIN_WIN_OPTIONS);
402
403 tegra_dc_remove_shared_plane(dc, p);
404
405 pm_runtime_put(dc->dev);
406}
407
408static void tegra_shared_plane_atomic_update(struct drm_plane *plane,
409 struct drm_plane_state *old_state)
410{
411 struct tegra_plane_state *state = to_tegra_plane_state(plane->state);
412 struct tegra_dc *dc = to_tegra_dc(plane->state->crtc);
413 unsigned int zpos = plane->state->normalized_zpos;
414 struct drm_framebuffer *fb = plane->state->fb;
415 struct tegra_plane *p = to_tegra_plane(plane);
416 struct tegra_bo *bo;
417 dma_addr_t base;
418 u32 value;
419
420 /* rien ne va plus */
421 if (!plane->state->crtc || !plane->state->fb)
422 return;
423
424 if (!plane->state->visible) {
425 tegra_shared_plane_atomic_disable(plane, old_state);
426 return;
427 }
428
429 pm_runtime_get_sync(dc->dev);
430
431 tegra_dc_assign_shared_plane(dc, p);
432
433 tegra_plane_writel(p, VCOUNTER, DC_WIN_CORE_ACT_CONTROL);
434
435 /* blending */
436 value = BLEND_FACTOR_DST_ALPHA_ZERO | BLEND_FACTOR_SRC_ALPHA_K2 |
437 BLEND_FACTOR_DST_COLOR_NEG_K1_TIMES_SRC |
438 BLEND_FACTOR_SRC_COLOR_K1_TIMES_SRC;
439 tegra_plane_writel(p, value, DC_WIN_BLEND_MATCH_SELECT);
440
441 value = BLEND_FACTOR_DST_ALPHA_ZERO | BLEND_FACTOR_SRC_ALPHA_K2 |
442 BLEND_FACTOR_DST_COLOR_NEG_K1_TIMES_SRC |
443 BLEND_FACTOR_SRC_COLOR_K1_TIMES_SRC;
444 tegra_plane_writel(p, value, DC_WIN_BLEND_NOMATCH_SELECT);
445
446 value = K2(255) | K1(255) | WINDOW_LAYER_DEPTH(255 - zpos);
447 tegra_plane_writel(p, value, DC_WIN_BLEND_LAYER_CONTROL);
448
449 /* bypass scaling */
450 value = HORIZONTAL_TAPS_5 | VERTICAL_TAPS_5;
451 tegra_plane_writel(p, value, DC_WIN_WINDOWGROUP_SET_CONTROL_INPUT_SCALER);
452
453 value = INPUT_SCALER_VBYPASS | INPUT_SCALER_HBYPASS;
454 tegra_plane_writel(p, value, DC_WIN_WINDOWGROUP_SET_INPUT_SCALER_USAGE);
455
456 /* disable compression */
457 tegra_plane_writel(p, 0, DC_WINBUF_CDE_CONTROL);
458
459 bo = tegra_fb_get_plane(fb, 0);
460 base = bo->paddr;
461
462 tegra_plane_writel(p, state->format, DC_WIN_COLOR_DEPTH);
463 tegra_plane_writel(p, 0, DC_WIN_PRECOMP_WGRP_PARAMS);
464
465 value = V_POSITION(plane->state->crtc_y) |
466 H_POSITION(plane->state->crtc_x);
467 tegra_plane_writel(p, value, DC_WIN_POSITION);
468
469 value = V_SIZE(plane->state->crtc_h) | H_SIZE(plane->state->crtc_w);
470 tegra_plane_writel(p, value, DC_WIN_SIZE);
471
472 value = WIN_ENABLE | COLOR_EXPAND;
473 tegra_plane_writel(p, value, DC_WIN_WIN_OPTIONS);
474
475 value = V_SIZE(plane->state->crtc_h) | H_SIZE(plane->state->crtc_w);
476 tegra_plane_writel(p, value, DC_WIN_CROPPED_SIZE);
477
478 tegra_plane_writel(p, upper_32_bits(base), DC_WINBUF_START_ADDR_HI);
479 tegra_plane_writel(p, lower_32_bits(base), DC_WINBUF_START_ADDR);
480
481 value = PITCH(fb->pitches[0]);
482 tegra_plane_writel(p, value, DC_WIN_PLANAR_STORAGE);
483
484 value = CLAMP_BEFORE_BLEND | DEGAMMA_SRGB | INPUT_RANGE_FULL;
485 tegra_plane_writel(p, value, DC_WIN_SET_PARAMS);
486
487 value = OFFSET_X(plane->state->src_y >> 16) |
488 OFFSET_Y(plane->state->src_x >> 16);
489 tegra_plane_writel(p, value, DC_WINBUF_CROPPED_POINT);
490
491 if (dc->soc->supports_block_linear) {
492 unsigned long height = state->tiling.value;
493
494 /* XXX */
495 switch (state->tiling.mode) {
496 case TEGRA_BO_TILING_MODE_PITCH:
497 value = DC_WINBUF_SURFACE_KIND_BLOCK_HEIGHT(0) |
498 DC_WINBUF_SURFACE_KIND_PITCH;
499 break;
500
501 /* XXX not supported on Tegra186 and later */
502 case TEGRA_BO_TILING_MODE_TILED:
503 value = DC_WINBUF_SURFACE_KIND_TILED;
504 break;
505
506 case TEGRA_BO_TILING_MODE_BLOCK:
507 value = DC_WINBUF_SURFACE_KIND_BLOCK_HEIGHT(height) |
508 DC_WINBUF_SURFACE_KIND_BLOCK;
509 break;
510 }
511
512 tegra_plane_writel(p, value, DC_WINBUF_SURFACE_KIND);
513 }
514
515 /* disable gamut CSC */
516 value = tegra_plane_readl(p, DC_WIN_WINDOW_SET_CONTROL);
517 value &= ~CONTROL_CSC_ENABLE;
518 tegra_plane_writel(p, value, DC_WIN_WINDOW_SET_CONTROL);
519
520 pm_runtime_put(dc->dev);
521}
522
523static const struct drm_plane_helper_funcs tegra_shared_plane_helper_funcs = {
524 .atomic_check = tegra_shared_plane_atomic_check,
525 .atomic_update = tegra_shared_plane_atomic_update,
526 .atomic_disable = tegra_shared_plane_atomic_disable,
527};
528
529struct drm_plane *tegra_shared_plane_create(struct drm_device *drm,
530 struct tegra_dc *dc,
531 unsigned int wgrp,
532 unsigned int index)
533{
534 enum drm_plane_type type = DRM_PLANE_TYPE_OVERLAY;
535 struct tegra_drm *tegra = drm->dev_private;
536 struct tegra_display_hub *hub = tegra->hub;
537 /* planes can be assigned to arbitrary CRTCs */
538 unsigned int possible_crtcs = 0x7;
539 struct tegra_shared_plane *plane;
540 unsigned int num_formats;
541 const u64 *modifiers;
542 struct drm_plane *p;
543 const u32 *formats;
544 int err;
545
546 plane = kzalloc(sizeof(*plane), GFP_KERNEL);
547 if (!plane)
548 return ERR_PTR(-ENOMEM);
549
550 plane->base.offset = 0x0a00 + 0x0300 * index;
551 plane->base.index = index;
552
553 plane->wgrp = &hub->wgrps[wgrp];
554 plane->wgrp->parent = dc->dev;
555
556 p = &plane->base.base;
557
558 num_formats = ARRAY_SIZE(tegra_shared_plane_formats);
559 formats = tegra_shared_plane_formats;
560 modifiers = tegra_shared_plane_modifiers;
561
562 err = drm_universal_plane_init(drm, p, possible_crtcs,
563 &tegra_plane_funcs, formats,
564 num_formats, modifiers, type, NULL);
565 if (err < 0) {
566 kfree(plane);
567 return ERR_PTR(err);
568 }
569
570 drm_plane_helper_add(p, &tegra_shared_plane_helper_funcs);
571 drm_plane_create_zpos_property(p, 0, 0, 255);
572
573 return p;
574}
575
576static struct drm_private_state *
577tegra_display_hub_duplicate_state(struct drm_private_obj *obj)
578{
579 struct tegra_display_hub_state *state;
580
581 state = kmemdup(obj->state, sizeof(*state), GFP_KERNEL);
582 if (!state)
583 return NULL;
584
585 __drm_atomic_helper_private_obj_duplicate_state(obj, &state->base);
586
587 return &state->base;
588}
589
590static void tegra_display_hub_destroy_state(struct drm_private_obj *obj,
591 struct drm_private_state *state)
592{
593 struct tegra_display_hub_state *hub_state =
594 to_tegra_display_hub_state(state);
595
596 kfree(hub_state);
597}
598
599static const struct drm_private_state_funcs tegra_display_hub_state_funcs = {
600 .atomic_duplicate_state = tegra_display_hub_duplicate_state,
601 .atomic_destroy_state = tegra_display_hub_destroy_state,
602};
603
604static struct tegra_display_hub_state *
605tegra_display_hub_get_state(struct tegra_display_hub *hub,
606 struct drm_atomic_state *state)
607{
608 struct drm_device *drm = dev_get_drvdata(hub->client.parent);
609 struct drm_private_state *priv;
610
611 WARN_ON(!drm_modeset_is_locked(&drm->mode_config.connection_mutex));
612
613 priv = drm_atomic_get_private_obj_state(state, &hub->base);
614 if (IS_ERR(priv))
615 return ERR_CAST(priv);
616
617 return to_tegra_display_hub_state(priv);
618}
619
620int tegra_display_hub_atomic_check(struct drm_device *drm,
621 struct drm_atomic_state *state)
622{
623 struct tegra_drm *tegra = drm->dev_private;
624 struct tegra_display_hub_state *hub_state;
625 struct drm_crtc_state *old, *new;
626 struct drm_crtc *crtc;
627 unsigned int i;
628
629 if (!tegra->hub)
630 return 0;
631
632 hub_state = tegra_display_hub_get_state(tegra->hub, state);
633 if (IS_ERR(hub_state))
634 return PTR_ERR(hub_state);
635
636 /*
637 * The display hub display clock needs to be fed by the display clock
638 * with the highest frequency to ensure proper functioning of all the
639 * displays.
640 *
641 * Note that this isn't used before Tegra186, but it doesn't hurt and
642 * conditionalizing it would make the code less clean.
643 */
644 for_each_oldnew_crtc_in_state(state, crtc, old, new, i) {
645 struct tegra_dc_state *dc = to_dc_state(new);
646
647 if (new->active) {
648 if (!hub_state->clk || dc->pclk > hub_state->rate) {
649 hub_state->dc = to_tegra_dc(dc->base.crtc);
650 hub_state->clk = hub_state->dc->clk;
651 hub_state->rate = dc->pclk;
652 }
653 }
654 }
655
656 return 0;
657}
658
659static void tegra_display_hub_update(struct tegra_dc *dc)
660{
661 u32 value;
662
663 pm_runtime_get_sync(dc->dev);
664
665 value = tegra_dc_readl(dc, DC_CMD_IHUB_COMMON_MISC_CTL);
666 value &= ~LATENCY_EVENT;
667 tegra_dc_writel(dc, value, DC_CMD_IHUB_COMMON_MISC_CTL);
668
669 value = tegra_dc_readl(dc, DC_DISP_IHUB_COMMON_DISPLAY_FETCH_METER);
670 value = CURS_SLOTS(1) | WGRP_SLOTS(1);
671 tegra_dc_writel(dc, value, DC_DISP_IHUB_COMMON_DISPLAY_FETCH_METER);
672
673 tegra_dc_writel(dc, COMMON_UPDATE, DC_CMD_STATE_CONTROL);
674 tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
675 tegra_dc_writel(dc, COMMON_ACTREQ, DC_CMD_STATE_CONTROL);
676 tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
677
678 pm_runtime_put(dc->dev);
679}
680
681void tegra_display_hub_atomic_commit(struct drm_device *drm,
682 struct drm_atomic_state *state)
683{
684 struct tegra_drm *tegra = drm->dev_private;
685 struct tegra_display_hub *hub = tegra->hub;
686 struct tegra_display_hub_state *hub_state;
687 struct device *dev = hub->client.dev;
688 int err;
689
690 hub_state = to_tegra_display_hub_state(hub->base.state);
691
692 if (hub_state->clk) {
693 err = clk_set_rate(hub_state->clk, hub_state->rate);
694 if (err < 0)
695 dev_err(dev, "failed to set rate of %pC to %lu Hz\n",
696 hub_state->clk, hub_state->rate);
697
698 err = clk_set_parent(hub->clk_disp, hub_state->clk);
699 if (err < 0)
700 dev_err(dev, "failed to set parent of %pC to %pC: %d\n",
701 hub->clk_disp, hub_state->clk, err);
702 }
703
704 if (hub_state->dc)
705 tegra_display_hub_update(hub_state->dc);
706}
707
708static int tegra_display_hub_init(struct host1x_client *client)
709{
710 struct tegra_display_hub *hub = to_tegra_display_hub(client);
711 struct drm_device *drm = dev_get_drvdata(client->parent);
712 struct tegra_drm *tegra = drm->dev_private;
713 struct tegra_display_hub_state *state;
714
715 state = kzalloc(sizeof(*state), GFP_KERNEL);
716 if (!state)
717 return -ENOMEM;
718
719 drm_atomic_private_obj_init(drm, &hub->base, &state->base,
720 &tegra_display_hub_state_funcs);
721
722 tegra->hub = hub;
723
724 return 0;
725}
726
727static int tegra_display_hub_exit(struct host1x_client *client)
728{
729 struct drm_device *drm = dev_get_drvdata(client->parent);
730 struct tegra_drm *tegra = drm->dev_private;
731
732 drm_atomic_private_obj_fini(&tegra->hub->base);
733 tegra->hub = NULL;
734
735 return 0;
736}
737
738static const struct host1x_client_ops tegra_display_hub_ops = {
739 .init = tegra_display_hub_init,
740 .exit = tegra_display_hub_exit,
741};
742
743static int tegra_display_hub_probe(struct platform_device *pdev)
744{
745 struct device_node *child = NULL;
746 struct tegra_display_hub *hub;
747 struct clk *clk;
748 unsigned int i;
749 int err;
750
751 hub = devm_kzalloc(&pdev->dev, sizeof(*hub), GFP_KERNEL);
752 if (!hub)
753 return -ENOMEM;
754
755 hub->soc = of_device_get_match_data(&pdev->dev);
756
757 hub->clk_disp = devm_clk_get(&pdev->dev, "disp");
758 if (IS_ERR(hub->clk_disp)) {
759 err = PTR_ERR(hub->clk_disp);
760 return err;
761 }
762
763 if (hub->soc->supports_dsc) {
764 hub->clk_dsc = devm_clk_get(&pdev->dev, "dsc");
765 if (IS_ERR(hub->clk_dsc)) {
766 err = PTR_ERR(hub->clk_dsc);
767 return err;
768 }
769 }
770
771 hub->clk_hub = devm_clk_get(&pdev->dev, "hub");
772 if (IS_ERR(hub->clk_hub)) {
773 err = PTR_ERR(hub->clk_hub);
774 return err;
775 }
776
777 hub->rst = devm_reset_control_get(&pdev->dev, "misc");
778 if (IS_ERR(hub->rst)) {
779 err = PTR_ERR(hub->rst);
780 return err;
781 }
782
783 hub->wgrps = devm_kcalloc(&pdev->dev, hub->soc->num_wgrps,
784 sizeof(*hub->wgrps), GFP_KERNEL);
785 if (!hub->wgrps)
786 return -ENOMEM;
787
788 for (i = 0; i < hub->soc->num_wgrps; i++) {
789 struct tegra_windowgroup *wgrp = &hub->wgrps[i];
790 char id[8];
791
792 snprintf(id, sizeof(id), "wgrp%u", i);
793 mutex_init(&wgrp->lock);
794 wgrp->usecount = 0;
795 wgrp->index = i;
796
797 wgrp->rst = devm_reset_control_get(&pdev->dev, id);
798 if (IS_ERR(wgrp->rst))
799 return PTR_ERR(wgrp->rst);
800
801 err = reset_control_assert(wgrp->rst);
802 if (err < 0)
803 return err;
804 }
805
806 hub->num_heads = of_get_child_count(pdev->dev.of_node);
807
808 hub->clk_heads = devm_kcalloc(&pdev->dev, hub->num_heads, sizeof(clk),
809 GFP_KERNEL);
810 if (!hub->clk_heads)
811 return -ENOMEM;
812
813 for (i = 0; i < hub->num_heads; i++) {
814 child = of_get_next_child(pdev->dev.of_node, child);
815 if (!child) {
816 dev_err(&pdev->dev, "failed to find node for head %u\n",
817 i);
818 return -ENODEV;
819 }
820
821 clk = devm_get_clk_from_child(&pdev->dev, child, "dc");
822 if (IS_ERR(clk)) {
823 dev_err(&pdev->dev, "failed to get clock for head %u\n",
824 i);
825 of_node_put(child);
826 return PTR_ERR(clk);
827 }
828
829 hub->clk_heads[i] = clk;
830 }
831
832 of_node_put(child);
833
834 /* XXX: enable clock across reset? */
835 err = reset_control_assert(hub->rst);
836 if (err < 0)
837 return err;
838
839 platform_set_drvdata(pdev, hub);
840 pm_runtime_enable(&pdev->dev);
841
842 INIT_LIST_HEAD(&hub->client.list);
843 hub->client.ops = &tegra_display_hub_ops;
844 hub->client.dev = &pdev->dev;
845
846 err = host1x_client_register(&hub->client);
847 if (err < 0)
848 dev_err(&pdev->dev, "failed to register host1x client: %d\n",
849 err);
850
851 return err;
852}
853
854static int tegra_display_hub_remove(struct platform_device *pdev)
855{
856 struct tegra_display_hub *hub = platform_get_drvdata(pdev);
857 int err;
858
859 err = host1x_client_unregister(&hub->client);
860 if (err < 0) {
861 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
862 err);
863 }
864
865 pm_runtime_disable(&pdev->dev);
866
867 return err;
868}
869
870static int __maybe_unused tegra_display_hub_suspend(struct device *dev)
871{
872 struct tegra_display_hub *hub = dev_get_drvdata(dev);
873 unsigned int i = hub->num_heads;
874 int err;
875
876 err = reset_control_assert(hub->rst);
877 if (err < 0)
878 return err;
879
880 while (i--)
881 clk_disable_unprepare(hub->clk_heads[i]);
882
883 clk_disable_unprepare(hub->clk_hub);
884 clk_disable_unprepare(hub->clk_dsc);
885 clk_disable_unprepare(hub->clk_disp);
886
887 return 0;
888}
889
890static int __maybe_unused tegra_display_hub_resume(struct device *dev)
891{
892 struct tegra_display_hub *hub = dev_get_drvdata(dev);
893 unsigned int i;
894 int err;
895
896 err = clk_prepare_enable(hub->clk_disp);
897 if (err < 0)
898 return err;
899
900 err = clk_prepare_enable(hub->clk_dsc);
901 if (err < 0)
902 goto disable_disp;
903
904 err = clk_prepare_enable(hub->clk_hub);
905 if (err < 0)
906 goto disable_dsc;
907
908 for (i = 0; i < hub->num_heads; i++) {
909 err = clk_prepare_enable(hub->clk_heads[i]);
910 if (err < 0)
911 goto disable_heads;
912 }
913
914 err = reset_control_deassert(hub->rst);
915 if (err < 0)
916 goto disable_heads;
917
918 return 0;
919
920disable_heads:
921 while (i--)
922 clk_disable_unprepare(hub->clk_heads[i]);
923
924 clk_disable_unprepare(hub->clk_hub);
925disable_dsc:
926 clk_disable_unprepare(hub->clk_dsc);
927disable_disp:
928 clk_disable_unprepare(hub->clk_disp);
929 return err;
930}
931
932static const struct dev_pm_ops tegra_display_hub_pm_ops = {
933 SET_RUNTIME_PM_OPS(tegra_display_hub_suspend,
934 tegra_display_hub_resume, NULL)
935};
936
937static const struct tegra_display_hub_soc tegra186_display_hub = {
938 .num_wgrps = 6,
939 .supports_dsc = true,
940};
941
942static const struct tegra_display_hub_soc tegra194_display_hub = {
943 .num_wgrps = 6,
944 .supports_dsc = false,
945};
946
947static const struct of_device_id tegra_display_hub_of_match[] = {
948 {
949 .compatible = "nvidia,tegra194-display",
950 .data = &tegra194_display_hub
951 }, {
952 .compatible = "nvidia,tegra186-display",
953 .data = &tegra186_display_hub
954 }, {
955 /* sentinel */
956 }
957};
958MODULE_DEVICE_TABLE(of, tegra_display_hub_of_match);
959
960struct platform_driver tegra_display_hub_driver = {
961 .driver = {
962 .name = "tegra-display-hub",
963 .of_match_table = tegra_display_hub_of_match,
964 .pm = &tegra_display_hub_pm_ops,
965 },
966 .probe = tegra_display_hub_probe,
967 .remove = tegra_display_hub_remove,
968};