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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/dma-mapping.h>
7#include <linux/iommu.h>
8#include <linux/interconnect.h>
9
10#include <drm/drm_atomic.h>
11#include <drm/drm_atomic_helper.h>
12#include <drm/drm_fourcc.h>
13#include <drm/drm_framebuffer.h>
14#include <drm/drm_gem_atomic_helper.h>
15
16#include "dc.h"
17#include "plane.h"
18
19static void tegra_plane_destroy(struct drm_plane *plane)
20{
21 struct tegra_plane *p = to_tegra_plane(plane);
22
23 drm_plane_cleanup(plane);
24 kfree(p);
25}
26
27static void tegra_plane_reset(struct drm_plane *plane)
28{
29 struct tegra_plane *p = to_tegra_plane(plane);
30 struct tegra_plane_state *state;
31 unsigned int i;
32
33 if (plane->state)
34 __drm_atomic_helper_plane_destroy_state(plane->state);
35
36 kfree(plane->state);
37 plane->state = NULL;
38
39 state = kzalloc_obj(*state);
40 if (state) {
41 plane->state = &state->base;
42 plane->state->plane = plane;
43 plane->state->zpos = p->index;
44 plane->state->normalized_zpos = p->index;
45
46 for (i = 0; i < 3; i++)
47 state->iova[i] = DMA_MAPPING_ERROR;
48 }
49}
50
51static struct drm_plane_state *
52tegra_plane_atomic_duplicate_state(struct drm_plane *plane)
53{
54 struct tegra_plane_state *state = to_tegra_plane_state(plane->state);
55 struct tegra_plane_state *copy;
56 unsigned int i;
57
58 copy = kmalloc_obj(*copy);
59 if (!copy)
60 return NULL;
61
62 __drm_atomic_helper_plane_duplicate_state(plane, &copy->base);
63 copy->tiling = state->tiling;
64 copy->format = state->format;
65 copy->swap = state->swap;
66 copy->reflect_x = state->reflect_x;
67 copy->reflect_y = state->reflect_y;
68 copy->opaque = state->opaque;
69 copy->total_peak_memory_bandwidth = state->total_peak_memory_bandwidth;
70 copy->peak_memory_bandwidth = state->peak_memory_bandwidth;
71 copy->avg_memory_bandwidth = state->avg_memory_bandwidth;
72
73 for (i = 0; i < 2; i++)
74 copy->blending[i] = state->blending[i];
75
76 for (i = 0; i < 3; i++) {
77 copy->iova[i] = DMA_MAPPING_ERROR;
78 copy->map[i] = NULL;
79 }
80
81 return &copy->base;
82}
83
84static void tegra_plane_atomic_destroy_state(struct drm_plane *plane,
85 struct drm_plane_state *state)
86{
87 __drm_atomic_helper_plane_destroy_state(state);
88 kfree(state);
89}
90
91static bool tegra_plane_supports_sector_layout(struct drm_plane *plane)
92{
93 struct drm_crtc *crtc;
94
95 drm_for_each_crtc(crtc, plane->dev) {
96 if (plane->possible_crtcs & drm_crtc_mask(crtc)) {
97 struct tegra_dc *dc = to_tegra_dc(crtc);
98
99 if (!dc->soc->supports_sector_layout)
100 return false;
101 }
102 }
103
104 return true;
105}
106
107static bool tegra_plane_format_mod_supported(struct drm_plane *plane,
108 uint32_t format,
109 uint64_t modifier)
110{
111 const struct drm_format_info *info = drm_format_info(format);
112
113 if (modifier == DRM_FORMAT_MOD_LINEAR)
114 return true;
115
116 /* check for the sector layout bit */
117 if (fourcc_mod_is_vendor(modifier, NVIDIA)) {
118 if (modifier & DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT) {
119 if (!tegra_plane_supports_sector_layout(plane))
120 return false;
121 }
122 }
123
124 if (info->num_planes == 1)
125 return true;
126
127 return false;
128}
129
130const struct drm_plane_funcs tegra_plane_funcs = {
131 .update_plane = drm_atomic_helper_update_plane,
132 .disable_plane = drm_atomic_helper_disable_plane,
133 .destroy = tegra_plane_destroy,
134 .reset = tegra_plane_reset,
135 .atomic_duplicate_state = tegra_plane_atomic_duplicate_state,
136 .atomic_destroy_state = tegra_plane_atomic_destroy_state,
137 .format_mod_supported = tegra_plane_format_mod_supported,
138};
139
140static int tegra_dc_pin(struct tegra_dc *dc, struct tegra_plane_state *state)
141{
142 unsigned int i;
143 int err;
144
145 for (i = 0; i < state->base.fb->format->num_planes; i++) {
146 struct tegra_bo *bo = tegra_fb_get_plane(state->base.fb, i);
147 struct host1x_bo_mapping *map;
148
149 map = host1x_bo_pin(dc->dev, &bo->base, DMA_TO_DEVICE, &dc->client.cache);
150 if (IS_ERR(map)) {
151 err = PTR_ERR(map);
152 goto unpin;
153 }
154
155 if (!dc->client.group) {
156 /*
157 * The display controller needs contiguous memory, so
158 * fail if the buffer is discontiguous and we fail to
159 * map its SG table to a single contiguous chunk of
160 * I/O virtual memory.
161 */
162 if (map->chunks > 1) {
163 err = -EINVAL;
164 goto unpin;
165 }
166
167 state->iova[i] = map->phys;
168 } else {
169 state->iova[i] = bo->iova;
170 }
171
172 state->map[i] = map;
173 }
174
175 return 0;
176
177unpin:
178 dev_err(dc->dev, "failed to map plane %u: %d\n", i, err);
179
180 while (i--) {
181 host1x_bo_unpin(state->map[i]);
182 state->iova[i] = DMA_MAPPING_ERROR;
183 state->map[i] = NULL;
184 }
185
186 return err;
187}
188
189static void tegra_dc_unpin(struct tegra_dc *dc, struct tegra_plane_state *state)
190{
191 unsigned int i;
192
193 for (i = 0; i < state->base.fb->format->num_planes; i++) {
194 host1x_bo_unpin(state->map[i]);
195 state->iova[i] = DMA_MAPPING_ERROR;
196 state->map[i] = NULL;
197 }
198}
199
200int tegra_plane_prepare_fb(struct drm_plane *plane,
201 struct drm_plane_state *state)
202{
203 struct tegra_dc *dc = to_tegra_dc(state->crtc);
204 int err;
205
206 if (!state->fb)
207 return 0;
208
209 err = drm_gem_plane_helper_prepare_fb(plane, state);
210 if (err < 0)
211 return err;
212
213 return tegra_dc_pin(dc, to_tegra_plane_state(state));
214}
215
216void tegra_plane_cleanup_fb(struct drm_plane *plane,
217 struct drm_plane_state *state)
218{
219 struct tegra_dc *dc = to_tegra_dc(state->crtc);
220
221 if (dc)
222 tegra_dc_unpin(dc, to_tegra_plane_state(state));
223}
224
225static int tegra_plane_calculate_memory_bandwidth(struct drm_plane_state *state)
226{
227 struct tegra_plane_state *tegra_state = to_tegra_plane_state(state);
228 unsigned int i, bpp, dst_w, dst_h, src_w, src_h, mul;
229 const struct tegra_dc_soc_info *soc;
230 const struct drm_format_info *fmt;
231 struct drm_crtc_state *crtc_state;
232 u64 avg_bandwidth, peak_bandwidth;
233
234 if (!state->visible)
235 return 0;
236
237 crtc_state = drm_atomic_get_new_crtc_state(state->state, state->crtc);
238 if (!crtc_state)
239 return -EINVAL;
240
241 src_w = drm_rect_width(&state->src) >> 16;
242 src_h = drm_rect_height(&state->src) >> 16;
243 dst_w = drm_rect_width(&state->dst);
244 dst_h = drm_rect_height(&state->dst);
245
246 fmt = state->fb->format;
247 soc = to_tegra_dc(state->crtc)->soc;
248
249 /*
250 * Note that real memory bandwidth vary depending on format and
251 * memory layout, we are not taking that into account because small
252 * estimation error isn't important since bandwidth is rounded up
253 * anyway.
254 */
255 for (i = 0, bpp = 0; i < fmt->num_planes; i++) {
256 unsigned int bpp_plane = fmt->cpp[i] * 8;
257
258 /*
259 * Sub-sampling is relevant for chroma planes only and vertical
260 * readouts are not cached, hence only horizontal sub-sampling
261 * matters.
262 */
263 if (i > 0)
264 bpp_plane /= fmt->hsub;
265
266 bpp += bpp_plane;
267 }
268
269 /* average bandwidth in kbytes/sec */
270 avg_bandwidth = min(src_w, dst_w) * min(src_h, dst_h);
271 avg_bandwidth *= drm_mode_vrefresh(&crtc_state->adjusted_mode);
272 avg_bandwidth = DIV_ROUND_UP(avg_bandwidth * bpp, 8) + 999;
273 do_div(avg_bandwidth, 1000);
274
275 /* mode.clock in kHz, peak bandwidth in kbytes/sec */
276 peak_bandwidth = DIV_ROUND_UP(crtc_state->adjusted_mode.clock * bpp, 8);
277
278 /*
279 * Tegra30/114 Memory Controller can't interleave DC memory requests
280 * for the tiled windows because DC uses 16-bytes atom, while DDR3
281 * uses 32-bytes atom. Hence there is x2 memory overfetch for tiled
282 * framebuffer and DDR3 on these SoCs.
283 */
284 if (soc->plane_tiled_memory_bandwidth_x2 &&
285 tegra_state->tiling.mode == TEGRA_BO_TILING_MODE_TILED)
286 mul = 2;
287 else
288 mul = 1;
289
290 /* ICC bandwidth in kbytes/sec */
291 tegra_state->peak_memory_bandwidth = kBps_to_icc(peak_bandwidth) * mul;
292 tegra_state->avg_memory_bandwidth = kBps_to_icc(avg_bandwidth) * mul;
293
294 return 0;
295}
296
297int tegra_plane_state_add(struct tegra_plane *plane,
298 struct drm_plane_state *state)
299{
300 struct drm_crtc_state *crtc_state;
301 struct tegra_dc_state *tegra;
302 int err;
303
304 /* Propagate errors from allocation or locking failures. */
305 crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
306 if (IS_ERR(crtc_state))
307 return PTR_ERR(crtc_state);
308
309 /* Check plane state for visibility and calculate clipping bounds */
310 err = drm_atomic_helper_check_plane_state(state, crtc_state,
311 0, INT_MAX, true, true);
312 if (err < 0)
313 return err;
314
315 err = tegra_plane_calculate_memory_bandwidth(state);
316 if (err < 0)
317 return err;
318
319 tegra = to_dc_state(crtc_state);
320
321 tegra->planes |= WIN_A_ACT_REQ << plane->index;
322
323 return 0;
324}
325
326int tegra_plane_format(u32 fourcc, u32 *format, u32 *swap)
327{
328 /* assume no swapping of fetched data */
329 if (swap)
330 *swap = BYTE_SWAP_NOSWAP;
331
332 switch (fourcc) {
333 case DRM_FORMAT_ARGB4444:
334 *format = WIN_COLOR_DEPTH_B4G4R4A4;
335 break;
336
337 case DRM_FORMAT_ARGB1555:
338 *format = WIN_COLOR_DEPTH_B5G5R5A1;
339 break;
340
341 case DRM_FORMAT_RGB565:
342 *format = WIN_COLOR_DEPTH_B5G6R5;
343 break;
344
345 case DRM_FORMAT_RGBA5551:
346 *format = WIN_COLOR_DEPTH_A1B5G5R5;
347 break;
348
349 case DRM_FORMAT_ARGB8888:
350 *format = WIN_COLOR_DEPTH_B8G8R8A8;
351 break;
352
353 case DRM_FORMAT_ABGR8888:
354 *format = WIN_COLOR_DEPTH_R8G8B8A8;
355 break;
356
357 case DRM_FORMAT_ABGR4444:
358 *format = WIN_COLOR_DEPTH_R4G4B4A4;
359 break;
360
361 case DRM_FORMAT_ABGR1555:
362 *format = WIN_COLOR_DEPTH_R5G5B5A;
363 break;
364
365 case DRM_FORMAT_BGRA5551:
366 *format = WIN_COLOR_DEPTH_AR5G5B5;
367 break;
368
369 case DRM_FORMAT_XRGB1555:
370 *format = WIN_COLOR_DEPTH_B5G5R5X1;
371 break;
372
373 case DRM_FORMAT_RGBX5551:
374 *format = WIN_COLOR_DEPTH_X1B5G5R5;
375 break;
376
377 case DRM_FORMAT_XBGR1555:
378 *format = WIN_COLOR_DEPTH_R5G5B5X1;
379 break;
380
381 case DRM_FORMAT_BGRX5551:
382 *format = WIN_COLOR_DEPTH_X1R5G5B5;
383 break;
384
385 case DRM_FORMAT_BGR565:
386 *format = WIN_COLOR_DEPTH_R5G6B5;
387 break;
388
389 case DRM_FORMAT_BGRA8888:
390 *format = WIN_COLOR_DEPTH_A8R8G8B8;
391 break;
392
393 case DRM_FORMAT_RGBA8888:
394 *format = WIN_COLOR_DEPTH_A8B8G8R8;
395 break;
396
397 case DRM_FORMAT_XRGB8888:
398 *format = WIN_COLOR_DEPTH_B8G8R8X8;
399 break;
400
401 case DRM_FORMAT_XBGR8888:
402 *format = WIN_COLOR_DEPTH_R8G8B8X8;
403 break;
404
405 case DRM_FORMAT_UYVY:
406 *format = WIN_COLOR_DEPTH_YCbCr422;
407 break;
408
409 case DRM_FORMAT_YUYV:
410 if (!swap)
411 return -EINVAL;
412
413 *format = WIN_COLOR_DEPTH_YCbCr422;
414 *swap = BYTE_SWAP_SWAP2;
415 break;
416
417 case DRM_FORMAT_YVYU:
418 if (!swap)
419 return -EINVAL;
420
421 *format = WIN_COLOR_DEPTH_YCbCr422;
422 *swap = BYTE_SWAP_SWAP4;
423 break;
424
425 case DRM_FORMAT_VYUY:
426 if (!swap)
427 return -EINVAL;
428
429 *format = WIN_COLOR_DEPTH_YCbCr422;
430 *swap = BYTE_SWAP_SWAP4HW;
431 break;
432
433 case DRM_FORMAT_YUV420:
434 *format = WIN_COLOR_DEPTH_YCbCr420P;
435 break;
436
437 case DRM_FORMAT_YUV422:
438 *format = WIN_COLOR_DEPTH_YCbCr422P;
439 break;
440
441 case DRM_FORMAT_YUV444:
442 *format = WIN_COLOR_DEPTH_YCbCr444P;
443 break;
444
445 case DRM_FORMAT_NV12:
446 *format = WIN_COLOR_DEPTH_YCbCr420SP;
447 break;
448
449 case DRM_FORMAT_NV21:
450 *format = WIN_COLOR_DEPTH_YCrCb420SP;
451 break;
452
453 case DRM_FORMAT_NV16:
454 *format = WIN_COLOR_DEPTH_YCbCr422SP;
455 break;
456
457 case DRM_FORMAT_NV61:
458 *format = WIN_COLOR_DEPTH_YCrCb422SP;
459 break;
460
461 case DRM_FORMAT_NV24:
462 *format = WIN_COLOR_DEPTH_YCbCr444SP;
463 break;
464
465 case DRM_FORMAT_NV42:
466 *format = WIN_COLOR_DEPTH_YCrCb444SP;
467 break;
468
469 default:
470 return -EINVAL;
471 }
472
473 return 0;
474}
475
476bool tegra_plane_format_is_indexed(unsigned int format)
477{
478 switch (format) {
479 case WIN_COLOR_DEPTH_P1:
480 case WIN_COLOR_DEPTH_P2:
481 case WIN_COLOR_DEPTH_P4:
482 case WIN_COLOR_DEPTH_P8:
483 return true;
484 }
485
486 return false;
487}
488
489bool tegra_plane_format_is_yuv(unsigned int format, unsigned int *planes, unsigned int *bpc)
490{
491 switch (format) {
492 case WIN_COLOR_DEPTH_YCbCr422:
493 case WIN_COLOR_DEPTH_YUV422:
494 if (planes)
495 *planes = 1;
496
497 if (bpc)
498 *bpc = 8;
499
500 return true;
501
502 case WIN_COLOR_DEPTH_YCbCr420P:
503 case WIN_COLOR_DEPTH_YUV420P:
504 case WIN_COLOR_DEPTH_YCbCr422P:
505 case WIN_COLOR_DEPTH_YUV422P:
506 case WIN_COLOR_DEPTH_YCbCr422R:
507 case WIN_COLOR_DEPTH_YUV422R:
508 case WIN_COLOR_DEPTH_YCbCr422RA:
509 case WIN_COLOR_DEPTH_YUV422RA:
510 case WIN_COLOR_DEPTH_YCbCr444P:
511 if (planes)
512 *planes = 3;
513
514 if (bpc)
515 *bpc = 8;
516
517 return true;
518
519 case WIN_COLOR_DEPTH_YCrCb420SP:
520 case WIN_COLOR_DEPTH_YCbCr420SP:
521 case WIN_COLOR_DEPTH_YCrCb422SP:
522 case WIN_COLOR_DEPTH_YCbCr422SP:
523 case WIN_COLOR_DEPTH_YCrCb444SP:
524 case WIN_COLOR_DEPTH_YCbCr444SP:
525 if (planes)
526 *planes = 2;
527
528 if (bpc)
529 *bpc = 8;
530
531 return true;
532 }
533
534 if (planes)
535 *planes = 1;
536
537 return false;
538}
539
540static bool __drm_format_has_alpha(u32 format)
541{
542 switch (format) {
543 case DRM_FORMAT_ARGB1555:
544 case DRM_FORMAT_RGBA5551:
545 case DRM_FORMAT_ABGR8888:
546 case DRM_FORMAT_ARGB8888:
547 return true;
548 }
549
550 return false;
551}
552
553static int tegra_plane_format_get_alpha(unsigned int opaque,
554 unsigned int *alpha)
555{
556 if (tegra_plane_format_is_yuv(opaque, NULL, NULL)) {
557 *alpha = opaque;
558 return 0;
559 }
560
561 switch (opaque) {
562 case WIN_COLOR_DEPTH_B5G5R5X1:
563 *alpha = WIN_COLOR_DEPTH_B5G5R5A1;
564 return 0;
565
566 case WIN_COLOR_DEPTH_X1B5G5R5:
567 *alpha = WIN_COLOR_DEPTH_A1B5G5R5;
568 return 0;
569
570 case WIN_COLOR_DEPTH_R8G8B8X8:
571 *alpha = WIN_COLOR_DEPTH_R8G8B8A8;
572 return 0;
573
574 case WIN_COLOR_DEPTH_B8G8R8X8:
575 *alpha = WIN_COLOR_DEPTH_B8G8R8A8;
576 return 0;
577
578 case WIN_COLOR_DEPTH_B5G6R5:
579 *alpha = opaque;
580 return 0;
581 }
582
583 return -EINVAL;
584}
585
586/*
587 * This is applicable to Tegra20 and Tegra30 only where the opaque formats can
588 * be emulated using the alpha formats and alpha blending disabled.
589 */
590static int tegra_plane_setup_opacity(struct tegra_plane *tegra,
591 struct tegra_plane_state *state)
592{
593 unsigned int format;
594 int err;
595
596 switch (state->format) {
597 case WIN_COLOR_DEPTH_B5G5R5A1:
598 case WIN_COLOR_DEPTH_A1B5G5R5:
599 case WIN_COLOR_DEPTH_R8G8B8A8:
600 case WIN_COLOR_DEPTH_B8G8R8A8:
601 state->opaque = false;
602 break;
603
604 default:
605 err = tegra_plane_format_get_alpha(state->format, &format);
606 if (err < 0)
607 return err;
608
609 state->format = format;
610 state->opaque = true;
611 break;
612 }
613
614 return 0;
615}
616
617static int tegra_plane_check_transparency(struct tegra_plane *tegra,
618 struct tegra_plane_state *state)
619{
620 struct drm_plane_state *old, *plane_state;
621 struct drm_plane *plane;
622
623 old = drm_atomic_get_old_plane_state(state->base.state, &tegra->base);
624
625 /* check if zpos / transparency changed */
626 if (old->normalized_zpos == state->base.normalized_zpos &&
627 to_tegra_plane_state(old)->opaque == state->opaque)
628 return 0;
629
630 /* include all sibling planes into this commit */
631 drm_for_each_plane(plane, tegra->base.dev) {
632 struct tegra_plane *p = to_tegra_plane(plane);
633
634 /* skip this plane and planes on different CRTCs */
635 if (p == tegra || p->dc != tegra->dc)
636 continue;
637
638 plane_state = drm_atomic_get_plane_state(state->base.state,
639 plane);
640 if (IS_ERR(plane_state))
641 return PTR_ERR(plane_state);
642 }
643
644 return 1;
645}
646
647static unsigned int tegra_plane_get_overlap_index(struct tegra_plane *plane,
648 struct tegra_plane *other)
649{
650 unsigned int index = 0, i;
651
652 WARN_ON(plane == other);
653
654 for (i = 0; i < 3; i++) {
655 if (i == plane->index)
656 continue;
657
658 if (i == other->index)
659 break;
660
661 index++;
662 }
663
664 return index;
665}
666
667static void tegra_plane_update_transparency(struct tegra_plane *tegra,
668 struct tegra_plane_state *state)
669{
670 struct drm_plane_state *new;
671 struct drm_plane *plane;
672 unsigned int i;
673
674 for_each_new_plane_in_state(state->base.state, plane, new, i) {
675 struct tegra_plane *p = to_tegra_plane(plane);
676 unsigned index;
677
678 /* skip this plane and planes on different CRTCs */
679 if (p == tegra || p->dc != tegra->dc)
680 continue;
681
682 index = tegra_plane_get_overlap_index(tegra, p);
683
684 if (new->fb && __drm_format_has_alpha(new->fb->format->format))
685 state->blending[index].alpha = true;
686 else
687 state->blending[index].alpha = false;
688
689 if (new->normalized_zpos > state->base.normalized_zpos)
690 state->blending[index].top = true;
691 else
692 state->blending[index].top = false;
693
694 /*
695 * Missing framebuffer means that plane is disabled, in this
696 * case mark B / C window as top to be able to differentiate
697 * windows indices order in regards to zPos for the middle
698 * window X / Y registers programming.
699 */
700 if (!new->fb)
701 state->blending[index].top = (index == 1);
702 }
703}
704
705static int tegra_plane_setup_transparency(struct tegra_plane *tegra,
706 struct tegra_plane_state *state)
707{
708 struct tegra_plane_state *tegra_state;
709 struct drm_plane_state *new;
710 struct drm_plane *plane;
711 int err;
712
713 /*
714 * If planes zpos / transparency changed, sibling planes blending
715 * state may require adjustment and in this case they will be included
716 * into this atom commit, otherwise blending state is unchanged.
717 */
718 err = tegra_plane_check_transparency(tegra, state);
719 if (err <= 0)
720 return err;
721
722 /*
723 * All planes are now in the atomic state, walk them up and update
724 * transparency state for each plane.
725 */
726 drm_for_each_plane(plane, tegra->base.dev) {
727 struct tegra_plane *p = to_tegra_plane(plane);
728
729 /* skip planes on different CRTCs */
730 if (p->dc != tegra->dc)
731 continue;
732
733 new = drm_atomic_get_new_plane_state(state->base.state, plane);
734 tegra_state = to_tegra_plane_state(new);
735
736 /*
737 * There is no need to update blending state for the disabled
738 * plane.
739 */
740 if (new->fb)
741 tegra_plane_update_transparency(p, tegra_state);
742 }
743
744 return 0;
745}
746
747int tegra_plane_setup_legacy_state(struct tegra_plane *tegra,
748 struct tegra_plane_state *state)
749{
750 int err;
751
752 err = tegra_plane_setup_opacity(tegra, state);
753 if (err < 0)
754 return err;
755
756 err = tegra_plane_setup_transparency(tegra, state);
757 if (err < 0)
758 return err;
759
760 return 0;
761}
762
763static const char * const tegra_plane_icc_names[TEGRA_DC_LEGACY_PLANES_NUM] = {
764 "wina", "winb", "winc", NULL, NULL, NULL, "cursor",
765};
766
767int tegra_plane_interconnect_init(struct tegra_plane *plane)
768{
769 const char *icc_name = tegra_plane_icc_names[plane->index];
770 struct device *dev = plane->dc->dev;
771 struct tegra_dc *dc = plane->dc;
772 int err;
773
774 if (WARN_ON(plane->index >= TEGRA_DC_LEGACY_PLANES_NUM) ||
775 WARN_ON(!tegra_plane_icc_names[plane->index]))
776 return -EINVAL;
777
778 plane->icc_mem = devm_of_icc_get(dev, icc_name);
779 err = PTR_ERR_OR_ZERO(plane->icc_mem);
780 if (err)
781 return dev_err_probe(dev, err, "failed to get %s interconnect\n",
782 icc_name);
783
784 /* plane B on T20/30 has a dedicated memory client for a 6-tap vertical filter */
785 if (plane->index == 1 && dc->soc->has_win_b_vfilter_mem_client) {
786 plane->icc_mem_vfilter = devm_of_icc_get(dev, "winb-vfilter");
787 err = PTR_ERR_OR_ZERO(plane->icc_mem_vfilter);
788 if (err)
789 return dev_err_probe(dev, err, "failed to get %s interconnect\n",
790 "winb-vfilter");
791 }
792
793 return 0;
794}