summaryrefslogtreecommitdiff
path: root/tests/kms_color.c
blob: d78c7e211511c39e89ef1545f14647a2b3e8478e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
/*
 * Copyright © 2015 Intel Corporation
 *
  * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 */

#include "kms_color_helper.h"

IGT_TEST_DESCRIPTION("Test Color Features at Pipe level");

static void test_pipe_degamma(data_t *data,
			      igt_plane_t *primary)
{
	igt_output_t *output;
	igt_display_t *display = &data->display;
	gamma_lut_t *degamma_linear, *degamma_full;
	color_t red_green_blue[] = {
		{ 1.0, 0.0, 0.0 },
		{ 0.0, 1.0, 0.0 },
		{ 0.0, 0.0, 1.0 }
	};
	drmModeModeInfo *mode;
	struct igt_fb fb_modeset, fb;
	igt_crc_t crc_fullgamma, crc_fullcolors;
	int fb_id, fb_modeset_id;

	igt_require(igt_pipe_obj_has_prop(primary->pipe, IGT_CRTC_DEGAMMA_LUT));
	igt_require(igt_pipe_obj_has_prop(primary->pipe, IGT_CRTC_GAMMA_LUT));

	degamma_linear = generate_table(data->degamma_lut_size, 1.0);
	degamma_full = generate_table_max(data->degamma_lut_size);

	output = igt_get_single_output_for_pipe(&data->display, primary->pipe->pipe);
	igt_require(output);

	igt_output_set_pipe(output, primary->pipe->pipe);
	mode = igt_output_get_mode(output);

	/* Create a framebuffer at the size of the output. */
	fb_id = igt_create_fb(data->drm_fd,
			      mode->hdisplay,
			      mode->vdisplay,
			      DRM_FORMAT_XRGB8888,
			      DRM_FORMAT_MOD_NONE,
			      &fb);
	igt_assert(fb_id);

	fb_modeset_id = igt_create_fb(data->drm_fd,
				      mode->hdisplay,
				      mode->vdisplay,
				      DRM_FORMAT_XRGB8888,
				      DRM_FORMAT_MOD_NONE,
				      &fb_modeset);
	igt_assert(fb_modeset_id);

	igt_plane_set_fb(primary, &fb_modeset);
	disable_ctm(primary->pipe);
	disable_gamma(primary->pipe);
	set_degamma(data, primary->pipe, degamma_linear);
	igt_display_commit(&data->display);

	/* Draw solid colors with linear degamma transformation. */
	paint_rectangles(data, mode, red_green_blue, &fb);
	igt_plane_set_fb(primary, &fb);
	igt_display_commit(&data->display);
	igt_wait_for_vblank(data->drm_fd,
			    display->pipes[primary->pipe->pipe].crtc_offset);
	igt_pipe_crc_collect_crc(data->pipe_crc, &crc_fullcolors);

	/* Draw a gradient with degamma LUT to remap all
	 * values to max red/green/blue.
	 */
	paint_gradient_rectangles(data, mode, red_green_blue, &fb);
	igt_plane_set_fb(primary, &fb);
	set_degamma(data, primary->pipe, degamma_full);
	igt_display_commit(&data->display);
	igt_wait_for_vblank(data->drm_fd,
			    display->pipes[primary->pipe->pipe].crtc_offset);
	igt_pipe_crc_collect_crc(data->pipe_crc, &crc_fullgamma);

	/* Verify that the CRC of the software computed output is
	 * equal to the CRC of the degamma LUT transformation output.
	 */
	igt_assert_crc_equal(&crc_fullgamma, &crc_fullcolors);

	disable_degamma(primary->pipe);
	igt_plane_set_fb(primary, NULL);
	igt_output_set_pipe(output, PIPE_NONE);
	igt_display_commit(&data->display);
	igt_remove_fb(data->drm_fd, &fb);
	igt_remove_fb(data->drm_fd, &fb_modeset);

	free_lut(degamma_linear);
	free_lut(degamma_full);
}

/*
 * Draw 3 gradient rectangles in red, green and blue, with a maxed out gamma
 * LUT and verify we have the same CRC as drawing solid color rectangles.
 */
static void test_pipe_gamma(data_t *data,
			    igt_plane_t *primary)
{
	igt_output_t *output;
	igt_display_t *display = &data->display;
	gamma_lut_t *gamma_full;
	color_t red_green_blue[] = {
		{ 1.0, 0.0, 0.0 },
		{ 0.0, 1.0, 0.0 },
		{ 0.0, 0.0, 1.0 }
	};
	drmModeModeInfo *mode;
	struct igt_fb fb_modeset, fb;
	igt_crc_t crc_fullgamma, crc_fullcolors;
	int fb_id, fb_modeset_id;

	igt_require(igt_pipe_obj_has_prop(primary->pipe, IGT_CRTC_GAMMA_LUT));

	gamma_full = generate_table_max(data->gamma_lut_size);

	output = igt_get_single_output_for_pipe(&data->display, primary->pipe->pipe);
	igt_require(output);

	igt_output_set_pipe(output, primary->pipe->pipe);
	mode = igt_output_get_mode(output);

	/* Create a framebuffer at the size of the output. */
	fb_id = igt_create_fb(data->drm_fd,
			      mode->hdisplay,
			      mode->vdisplay,
			      DRM_FORMAT_XRGB8888,
			      DRM_FORMAT_MOD_NONE,
			      &fb);
	igt_assert(fb_id);

	fb_modeset_id = igt_create_fb(data->drm_fd,
				      mode->hdisplay,
				      mode->vdisplay,
				      DRM_FORMAT_XRGB8888,
				      DRM_FORMAT_MOD_NONE,
				      &fb_modeset);
	igt_assert(fb_modeset_id);

	igt_plane_set_fb(primary, &fb_modeset);
	disable_ctm(primary->pipe);
	disable_degamma(primary->pipe);
	set_gamma(data, primary->pipe, gamma_full);
	igt_display_commit(&data->display);

	/* Draw solid colors with no gamma transformation. */
	paint_rectangles(data, mode, red_green_blue, &fb);
	igt_plane_set_fb(primary, &fb);
	igt_display_commit(&data->display);
	igt_wait_for_vblank(data->drm_fd,
			    display->pipes[primary->pipe->pipe].crtc_offset);
	igt_pipe_crc_collect_crc(data->pipe_crc, &crc_fullcolors);

	/* Draw a gradient with gamma LUT to remap all values
	 * to max red/green/blue.
	 */
	paint_gradient_rectangles(data, mode, red_green_blue, &fb);
	igt_plane_set_fb(primary, &fb);
	igt_display_commit(&data->display);
	igt_wait_for_vblank(data->drm_fd,
			    display->pipes[primary->pipe->pipe].crtc_offset);
	igt_pipe_crc_collect_crc(data->pipe_crc, &crc_fullgamma);

	/* Verify that the CRC of the software computed output is
	 * equal to the CRC of the gamma LUT transformation output.
	 */
	igt_assert_crc_equal(&crc_fullgamma, &crc_fullcolors);

	disable_gamma(primary->pipe);
	igt_plane_set_fb(primary, NULL);
	igt_output_set_pipe(output, PIPE_NONE);
	igt_display_commit(&data->display);
	igt_remove_fb(data->drm_fd, &fb);
	igt_remove_fb(data->drm_fd, &fb_modeset);

	free_lut(gamma_full);
}

/*
 * Draw 3 gradient rectangles in red, green and blue, with a maxed out legacy
 * gamma LUT and verify we have the same CRC as drawing solid color rectangles
 * with linear legacy gamma LUT.
 */
static void test_pipe_legacy_gamma(data_t *data,
				   igt_plane_t *primary)
{
	igt_output_t *output;
	igt_display_t *display = &data->display;
	color_t red_green_blue[] = {
		{ 1.0, 0.0, 0.0 },
		{ 0.0, 1.0, 0.0 },
		{ 0.0, 0.0, 1.0 }
	};
	drmModeCrtc *kms_crtc;
	uint32_t i, legacy_lut_size;
	uint16_t *red_lut, *green_lut, *blue_lut;
	drmModeModeInfo *mode;
	struct igt_fb fb_modeset, fb;
	igt_crc_t crc_fullgamma, crc_fullcolors;
	int fb_id, fb_modeset_id;

	kms_crtc = drmModeGetCrtc(data->drm_fd, primary->pipe->crtc_id);
	legacy_lut_size = kms_crtc->gamma_size;
	drmModeFreeCrtc(kms_crtc);

	red_lut = malloc(sizeof(uint16_t) * legacy_lut_size);
	green_lut = malloc(sizeof(uint16_t) * legacy_lut_size);
	blue_lut = malloc(sizeof(uint16_t) * legacy_lut_size);

	output = igt_get_single_output_for_pipe(&data->display, primary->pipe->pipe);
	igt_require(output);

	igt_output_set_pipe(output, primary->pipe->pipe);
	mode = igt_output_get_mode(output);

	/* Create a framebuffer at the size of the output. */
	fb_id = igt_create_fb(data->drm_fd,
			      mode->hdisplay,
			      mode->vdisplay,
			      DRM_FORMAT_XRGB8888,
			      DRM_FORMAT_MOD_NONE,
			      &fb);
	igt_assert(fb_id);

	fb_modeset_id = igt_create_fb(data->drm_fd,
				      mode->hdisplay,
				      mode->vdisplay,
				      DRM_FORMAT_XRGB8888,
				      DRM_FORMAT_MOD_NONE,
				      &fb_modeset);
	igt_assert(fb_modeset_id);

	igt_plane_set_fb(primary, &fb_modeset);
	disable_degamma(primary->pipe);
	disable_gamma(primary->pipe);
	disable_ctm(primary->pipe);
	igt_display_commit(&data->display);

	/* Draw solid colors with no gamma transformation. */
	paint_rectangles(data, mode, red_green_blue, &fb);
	igt_plane_set_fb(primary, &fb);
	igt_display_commit(&data->display);
	igt_wait_for_vblank(data->drm_fd,
			    display->pipes[primary->pipe->pipe].crtc_offset);
	igt_pipe_crc_collect_crc(data->pipe_crc, &crc_fullcolors);

	/* Draw a gradient with gamma LUT to remap all values
	 * to max red/green/blue.
	 */
	paint_gradient_rectangles(data, mode, red_green_blue, &fb);
	igt_plane_set_fb(primary, &fb);

	red_lut[0] = green_lut[0] = blue_lut[0] = 0;
	for (i = 1; i < legacy_lut_size; i++)
		red_lut[i] = green_lut[i] = blue_lut[i] = 0xffff;
	igt_assert_eq(drmModeCrtcSetGamma(data->drm_fd, primary->pipe->crtc_id,
					  legacy_lut_size, red_lut, green_lut, blue_lut), 0);
	igt_display_commit(&data->display);
	igt_wait_for_vblank(data->drm_fd,
			    display->pipes[primary->pipe->pipe].crtc_offset);
	igt_pipe_crc_collect_crc(data->pipe_crc, &crc_fullgamma);

	/* Verify that the CRC of the software computed output is
	 * equal to the CRC of the gamma LUT transformation output.
	 */
	igt_assert_crc_equal(&crc_fullgamma, &crc_fullcolors);

	/* Reset output. */
	for (i = 1; i < legacy_lut_size; i++)
		red_lut[i] = green_lut[i] = blue_lut[i] = i << 8;

	igt_assert_eq(drmModeCrtcSetGamma(data->drm_fd, primary->pipe->crtc_id,
					  legacy_lut_size, red_lut, green_lut, blue_lut), 0);
	igt_display_commit(&data->display);

	igt_plane_set_fb(primary, NULL);
	igt_output_set_pipe(output, PIPE_NONE);
	igt_remove_fb(data->drm_fd, &fb);
	igt_remove_fb(data->drm_fd, &fb_modeset);

	free(red_lut);
	free(green_lut);
	free(blue_lut);
}

/*
 * Verify that setting the legacy gamma LUT resets the gamma LUT set
 * through the GAMMA_LUT property.
 */
static void test_pipe_legacy_gamma_reset(data_t *data,
					 igt_plane_t *primary)
{
	const double ctm_identity[] = {
		1.0, 0.0, 0.0,
		0.0, 1.0, 0.0,
		0.0, 0.0, 1.0
	};
	drmModeCrtc *kms_crtc;
	gamma_lut_t *degamma_linear = NULL, *gamma_zero;
	uint32_t i, legacy_lut_size;
	uint16_t *red_lut, *green_lut, *blue_lut;
	struct drm_color_lut *lut;
	drmModePropertyBlobPtr blob;
	igt_output_t *output;

	igt_require(igt_pipe_obj_has_prop(primary->pipe, IGT_CRTC_GAMMA_LUT));

	if (igt_pipe_obj_has_prop(primary->pipe, IGT_CRTC_DEGAMMA_LUT))
		degamma_linear = generate_table(data->degamma_lut_size, 1.0);
	gamma_zero = generate_table_zero(data->gamma_lut_size);

	output = igt_get_single_output_for_pipe(&data->display, primary->pipe->pipe);
	igt_require(output);

	igt_output_set_pipe(output, primary->pipe->pipe);

	/* Ensure we have a clean state to start with. */
	disable_degamma(primary->pipe);
	disable_ctm(primary->pipe);
	disable_gamma(primary->pipe);
	igt_display_commit(&data->display);

	/* Set a degama & gamma LUT and a CTM using the
	 * properties and verify the content of the
	 * properties. */
	if (igt_pipe_obj_has_prop(primary->pipe, IGT_CRTC_DEGAMMA_LUT))
		set_degamma(data, primary->pipe, degamma_linear);
	if (igt_pipe_obj_has_prop(primary->pipe, IGT_CRTC_CTM))
		set_ctm(primary->pipe, ctm_identity);
	set_gamma(data, primary->pipe, gamma_zero);
	igt_display_commit(&data->display);

	if (igt_pipe_obj_has_prop(primary->pipe, IGT_CRTC_DEGAMMA_LUT)) {
		blob = get_blob(data, primary->pipe, IGT_CRTC_DEGAMMA_LUT);
		igt_assert(blob &&
			   blob->length == (sizeof(struct drm_color_lut) *
					    data->degamma_lut_size));
		drmModeFreePropertyBlob(blob);
	}

	if (igt_pipe_obj_has_prop(primary->pipe, IGT_CRTC_CTM)) {
		blob = get_blob(data, primary->pipe, IGT_CRTC_CTM);
		igt_assert(blob &&
			   blob->length == sizeof(struct drm_color_ctm));
		drmModeFreePropertyBlob(blob);
	}

	blob = get_blob(data, primary->pipe, IGT_CRTC_GAMMA_LUT);
	igt_assert(blob &&
		   blob->length == (sizeof(struct drm_color_lut) *
				    data->gamma_lut_size));
	lut = (struct drm_color_lut *) blob->data;
	for (i = 0; i < data->gamma_lut_size; i++)
		igt_assert(lut[i].red == 0 &&
			   lut[i].green == 0 &&
			   lut[i].blue == 0);
	drmModeFreePropertyBlob(blob);

	/* Set a gamma LUT using the legacy ioctl and verify
	 * the content of the GAMMA_LUT property is changed
	 * and that CTM and DEGAMMA_LUT are empty. */
	kms_crtc = drmModeGetCrtc(data->drm_fd, primary->pipe->crtc_id);
	legacy_lut_size = kms_crtc->gamma_size;
	drmModeFreeCrtc(kms_crtc);

	red_lut = malloc(sizeof(uint16_t) * legacy_lut_size);
	green_lut = malloc(sizeof(uint16_t) * legacy_lut_size);
	blue_lut = malloc(sizeof(uint16_t) * legacy_lut_size);

	for (i = 0; i < legacy_lut_size; i++)
		red_lut[i] = green_lut[i] = blue_lut[i] = 0xffff;

	igt_assert_eq(drmModeCrtcSetGamma(data->drm_fd,
					  primary->pipe->crtc_id,
					  legacy_lut_size,
					  red_lut, green_lut, blue_lut), 0);
	igt_display_commit(&data->display);

	if (igt_pipe_obj_has_prop(primary->pipe, IGT_CRTC_DEGAMMA_LUT))
		igt_assert(get_blob(data, primary->pipe,
				    IGT_CRTC_DEGAMMA_LUT) == NULL);

	if (igt_pipe_obj_has_prop(primary->pipe, IGT_CRTC_CTM))
		igt_assert(get_blob(data, primary->pipe, IGT_CRTC_CTM) == NULL);

	blob = get_blob(data, primary->pipe, IGT_CRTC_GAMMA_LUT);
	igt_assert(blob &&
		   blob->length == (sizeof(struct drm_color_lut) *
				    legacy_lut_size));
	lut = (struct drm_color_lut *) blob->data;
	for (i = 0; i < legacy_lut_size; i++)
		igt_assert(lut[i].red == 0xffff &&
			   lut[i].green == 0xffff &&
			   lut[i].blue == 0xffff);
	drmModeFreePropertyBlob(blob);

	igt_plane_set_fb(primary, NULL);
	igt_output_set_pipe(output, PIPE_NONE);

	free_lut(degamma_linear);
	free_lut(gamma_zero);
}

/*
 * Draw 3 rectangles using before colors with the ctm matrix apply and verify
 * the CRC is equal to using after colors with an identify ctm matrix.
 */
static bool test_pipe_ctm(data_t *data,
			  igt_plane_t *primary,
			  color_t *before,
			  color_t *after,
			  double *ctm_matrix)
{
	const double ctm_identity[] = {
		1.0, 0.0, 0.0,
		0.0, 1.0, 0.0,
		0.0, 0.0, 1.0
	};
	gamma_lut_t *degamma_linear, *gamma_linear;
	igt_output_t *output;
	bool ret = true;
	igt_display_t *display = &data->display;
	drmModeModeInfo *mode;
	struct igt_fb fb_modeset, fb;
	igt_crc_t crc_software, crc_hardware;
	int fb_id, fb_modeset_id;

	igt_require(igt_pipe_obj_has_prop(primary->pipe, IGT_CRTC_CTM));

	degamma_linear = generate_table(data->degamma_lut_size, 1.0);
	gamma_linear = generate_table(data->gamma_lut_size, 1.0);

	output = igt_get_single_output_for_pipe(&data->display, primary->pipe->pipe);
	igt_require(output);

	igt_output_set_pipe(output, primary->pipe->pipe);
	mode = igt_output_get_mode(output);

	/* Create a framebuffer at the size of the output. */
	fb_id = igt_create_fb(data->drm_fd,
			      mode->hdisplay,
			      mode->vdisplay,
			      DRM_FORMAT_XRGB8888,
			      DRM_FORMAT_MOD_NONE,
			      &fb);
	igt_assert(fb_id);

	fb_modeset_id = igt_create_fb(data->drm_fd,
				      mode->hdisplay,
				      mode->vdisplay,
				      DRM_FORMAT_XRGB8888,
				      DRM_FORMAT_MOD_NONE,
				      &fb_modeset);
	igt_assert(fb_modeset_id);
	igt_plane_set_fb(primary, &fb_modeset);

	/*
	 * Don't program LUT's for max CTM cases, as limitation of
	 * representing intermediate values between 0 and 1.0 causes
	 * rounding issues and inaccuracies leading to crc mismatch.
	 */
	if (memcmp(before, after, sizeof(color_t))) {
		set_degamma(data, primary->pipe, degamma_linear);
		set_gamma(data, primary->pipe, gamma_linear);
	} else {
		/* Disable Degamma and Gamma for ctm max test */
		disable_degamma(primary->pipe);
		disable_gamma(primary->pipe);
	}

	disable_ctm(primary->pipe);
	igt_display_commit(&data->display);

	paint_rectangles(data, mode, after, &fb);
	igt_plane_set_fb(primary, &fb);
	set_ctm(primary->pipe, ctm_identity);
	igt_display_commit(&data->display);
	igt_wait_for_vblank(data->drm_fd,
			    display->pipes[primary->pipe->pipe].crtc_offset);
	igt_pipe_crc_collect_crc(data->pipe_crc, &crc_software);

	/* With CTM transformation. */
	paint_rectangles(data, mode, before, &fb);
	igt_plane_set_fb(primary, &fb);
	set_ctm(primary->pipe, ctm_matrix);
	igt_display_commit(&data->display);
	igt_wait_for_vblank(data->drm_fd,
			    display->pipes[primary->pipe->pipe].crtc_offset);
	igt_pipe_crc_collect_crc(data->pipe_crc, &crc_hardware);

	/* Verify that the CRC of the software computed output is
	 * equal to the CRC of the CTM matrix transformation output.
	 */
	ret &= !igt_skip_crc_compare || igt_check_crc_equal(&crc_software, &crc_hardware);

	igt_plane_set_fb(primary, NULL);
	igt_output_set_pipe(output, PIPE_NONE);
	igt_remove_fb(data->drm_fd, &fb);
	igt_remove_fb(data->drm_fd, &fb_modeset);

	free_lut(degamma_linear);
	free_lut(gamma_linear);

	return ret;
}

/*
 * Hardware computes CRC based on the number of bits it is working with (8,
 * 10, 12, 16 bits), meaning with a framebuffer of 8bits per color will
 * usually leave the remaining lower bits at 0.
 *
 * We're programming the gamma LUT in order to get rid of those lower bits so
 * we can compare the CRC of a framebuffer without any transformation to a CRC
 * with transformation applied and verify the CRCs match.
 *
 * This test is currently disabled as the CRC computed on Intel hardware seems
 * to include data on the lower bits, this is preventing us to CRC checks.
 */
#if 0
static void test_pipe_limited_range_ctm(data_t *data,
					igt_plane_t *primary)
{
	double limited_result = 235.0 / 255.0;
	color_t red_green_blue_limited[] = {
		{ limited_result, 0.0, 0.0 },
		{ 0.0, limited_result, 0.0 },
		{ 0.0, 0.0, limited_result }
	};
	color_t red_green_blue_full[] = {
		{ 0.5, 0.0, 0.0 },
		{ 0.0, 0.5, 0.0 },
		{ 0.0, 0.0, 0.5 }
	};
	double ctm[] = { 1.0, 0.0, 0.0,
			0.0, 1.0, 0.0,
			0.0, 0.0, 1.0 };
	gamma_lut_t *degamma_linear, *gamma_linear;
	igt_output_t *output;
	bool has_broadcast_rgb_output = false;
	igt_display_t *display = &data->display;

	degamma_linear = generate_table(data->degamma_lut_size, 1.0);
	gamma_linear = generate_table(data->gamma_lut_size, 1.0);

	for_each_valid_output_on_pipe(&data->display, primary->pipe->pipe, output) {
		drmModeModeInfo *mode;
		struct igt_fb fb_modeset, fb;
		igt_crc_t crc_full, crc_limited;
		int fb_id, fb_modeset_id;

		if (!igt_output_has_prop(output, IGT_CONNECTOR_BROADCAST_RGB))
			continue;

		has_broadcast_rgb_output = true;

		igt_output_set_pipe(output, primary->pipe->pipe);
		mode = igt_output_get_mode(output);

		/* Create a framebuffer at the size of the output. */
		fb_id = igt_create_fb(data->drm_fd,
				      mode->hdisplay,
				      mode->vdisplay,
				      DRM_FORMAT_XRGB8888,
				      DRM_FORMAT_MOD_NONE,
				      &fb);
		igt_assert(fb_id);

		fb_modeset_id = igt_create_fb(data->drm_fd,
					      mode->hdisplay,
					      mode->vdisplay,
					      DRM_FORMAT_XRGB8888,
					      DRM_FORMAT_MOD_NONE,
					      &fb_modeset);
		igt_assert(fb_modeset_id);
		igt_plane_set_fb(primary, &fb_modeset);

		set_degamma(data, primary->pipe, degamma_linear);
		set_gamma(data, primary->pipe, gamma_linear);
		set_ctm(primary->pipe, ctm);

		igt_output_set_prop_value(output, IGT_CONNECTOR_BROADCAST_RGB, BROADCAST_RGB_FULL);
		paint_rectangles(data, mode, red_green_blue_limited, &fb);
		igt_plane_set_fb(primary, &fb);
		igt_display_commit(&data->display);
		igt_wait_for_vblank(data->drm_fd,
				display->pipes[primary->pipe->pipe].crtc_offset);
		igt_pipe_crc_collect_crc(data->pipe_crc, &crc_full);

		/* Set the output into limited range. */
		igt_output_set_prop_value(output, IGT_CONNECTOR_BROADCAST_RGB, BROADCAST_RGB_16_235);
		paint_rectangles(data, mode, red_green_blue_full, &fb);
		igt_plane_set_fb(primary, &fb);
		igt_display_commit(&data->display);
		igt_wait_for_vblank(data->drm_fd,
				display->pipes[primary->pipe->pipe].crtc_offset);
		igt_pipe_crc_collect_crc(data->pipe_crc, &crc_limited);

		/* And reset.. */
		igt_output_set_prop_value(output, IGT_CONNECTOR_BROADCAST_RGB, BROADCAST_RGB_FULL);
		igt_plane_set_fb(primary, NULL);
		igt_output_set_pipe(output, PIPE_NONE);

		/* Verify that the CRC of the software computed output is
		 * equal to the CRC of the CTM matrix transformation output.
		 */
		igt_assert_crc_equal(&crc_full, &crc_limited);

		igt_remove_fb(data->drm_fd, &fb);
		igt_remove_fb(data->drm_fd, &fb_modeset);
	}

	free_lut(gamma_linear);
	free_lut(degamma_linear);

	igt_require(has_broadcast_rgb_output);
}
#endif

static void
prep_pipe(data_t *data, enum pipe p)
{
	igt_require_pipe(&data->display, p);

	if (igt_pipe_obj_has_prop(&data->display.pipes[p], IGT_CRTC_DEGAMMA_LUT_SIZE)) {
		data->degamma_lut_size =
			igt_pipe_obj_get_prop(&data->display.pipes[p],
					      IGT_CRTC_DEGAMMA_LUT_SIZE);
		igt_assert_lt(0, data->degamma_lut_size);
	}

	if (igt_pipe_obj_has_prop(&data->display.pipes[p], IGT_CRTC_GAMMA_LUT_SIZE)) {
		data->gamma_lut_size =
			igt_pipe_obj_get_prop(&data->display.pipes[p],
					      IGT_CRTC_GAMMA_LUT_SIZE);
		igt_assert_lt(0, data->gamma_lut_size);
	}
}

static void
run_tests_for_pipe(data_t *data, enum pipe p)
{
	igt_pipe_t *pipe;
	igt_plane_t *primary;
	double delta;
	int i;
	color_t red_green_blue[] = {
		{ 1.0, 0.0, 0.0 },
		{ 0.0, 1.0, 0.0 },
		{ 0.0, 0.0, 1.0 }
	};

	igt_fixture {
		prep_pipe(data, p);

		igt_require_pipe_crc(data->drm_fd);

		pipe = &data->display.pipes[p];
		igt_require(pipe->n_planes >= 0);

		primary = igt_pipe_get_plane_type(pipe, DRM_PLANE_TYPE_PRIMARY);

		data->pipe_crc = igt_pipe_crc_new(data->drm_fd,
						  primary->pipe->pipe,
						  INTEL_PIPE_CRC_SOURCE_AUTO);

		igt_display_require_output_on_pipe(&data->display, p);
	}

	/* We assume an 8bits depth per color for degamma/gamma LUTs
	 * for CRC checks with framebuffer references. */
	data->color_depth = 8;
	delta = 1.0 / (1 << data->color_depth);

	igt_describe("Check the color transformation from red to blue");
	igt_subtest_f("pipe-%s-ctm-red-to-blue", kmstest_pipe_name(p)) {
		color_t blue_green_blue[] = {
			{ 0.0, 0.0, 1.0 },
			{ 0.0, 1.0, 0.0 },
			{ 0.0, 0.0, 1.0 }
		};
		double ctm[] = { 0.0, 0.0, 0.0,
				0.0, 1.0, 0.0,
				1.0, 0.0, 1.0 };
		igt_assert(test_pipe_ctm(data, primary, red_green_blue,
					 blue_green_blue, ctm));
	}

	igt_describe("Check the color transformation from green to red");
	igt_subtest_f("pipe-%s-ctm-green-to-red", kmstest_pipe_name(p)) {
		color_t red_red_blue[] = {
			{ 1.0, 0.0, 0.0 },
			{ 1.0, 0.0, 0.0 },
			{ 0.0, 0.0, 1.0 }
		};
		double ctm[] = { 1.0, 1.0, 0.0,
				0.0, 0.0, 0.0,
				0.0, 0.0, 1.0 };
		igt_assert(test_pipe_ctm(data, primary, red_green_blue,
					 red_red_blue, ctm));
	}

	igt_describe("Check the color transformation from blue to red");
	igt_subtest_f("pipe-%s-ctm-blue-to-red", kmstest_pipe_name(p)) {
		color_t red_green_red[] = {
			{ 1.0, 0.0, 0.0 },
			{ 0.0, 1.0, 0.0 },
			{ 1.0, 0.0, 0.0 }
		};
		double ctm[] = { 1.0, 0.0, 1.0,
				0.0, 1.0, 0.0,
				0.0, 0.0, 0.0 };
		igt_assert(test_pipe_ctm(data, primary, red_green_blue,
					 red_green_red, ctm));
	}

	/* We tests a few values around the expected result because
	 * the it depends on the hardware we're dealing with, we can
	 * either get clamped or rounded values and we also need to
	 * account for odd number of items in the LUTs. */
	igt_describe("Check the color transformation for 0.25 transparency");
	igt_subtest_f("pipe-%s-ctm-0-25", kmstest_pipe_name(p)) {
		color_t expected_colors[] = {
			{ 0.0, }, { 0.0, }, { 0.0, }
		};
		double ctm[] = { 0.25, 0.0,  0.0,
				 0.0,  0.25, 0.0,
				 0.0,  0.0,  0.25 };
		bool success = false;

		for (i = 0; i < 5; i++) {
			expected_colors[0].r =
				expected_colors[1].g =
				expected_colors[2].b =
				0.25 + delta * (i - 2);
			success |= test_pipe_ctm(data, primary,
						 red_green_blue,
						 expected_colors, ctm);
		}
		igt_assert(success);
	}

	igt_describe("Check the color transformation for 0.5 transparency");
	igt_subtest_f("pipe-%s-ctm-0-5", kmstest_pipe_name(p)) {
		color_t expected_colors[] = {
			{ 0.0, }, { 0.0, }, { 0.0, }
		};
		double ctm[] = { 0.5, 0.0, 0.0,
				 0.0, 0.5, 0.0,
				 0.0, 0.0, 0.5 };
		bool success = false;

		for (i = 0; i < 5; i++) {
			expected_colors[0].r =
				expected_colors[1].g =
				expected_colors[2].b =
				0.5 + delta * (i - 2);
			success |= test_pipe_ctm(data, primary,
						 red_green_blue,
						 expected_colors, ctm);
		}
		igt_assert(success);
	}

	igt_describe("Check the color transformation for 0.75 transparency");
	igt_subtest_f("pipe-%s-ctm-0-75", kmstest_pipe_name(p)) {
		color_t expected_colors[] = {
			{ 0.0, }, { 0.0, }, { 0.0, }
		};
		double ctm[] = { 0.75, 0.0,  0.0,
				 0.0,  0.75, 0.0,
				 0.0,  0.0,  0.75 };
		bool success = false;

		for (i = 0; i < 7; i++) {
			expected_colors[0].r =
				expected_colors[1].g =
				expected_colors[2].b =
				0.75 + delta * (i - 3);
			success |= test_pipe_ctm(data, primary,
						 red_green_blue,
						 expected_colors, ctm);
		}
		igt_assert(success);
	}

	igt_describe("Check the color transformation for maximum transparency");
	igt_subtest_f("pipe-%s-ctm-max", kmstest_pipe_name(p)) {
		color_t full_rgb[] = {
			{ 1.0, 0.0, 0.0 },
			{ 0.0, 1.0, 0.0 },
			{ 0.0, 0.0, 1.0 }
		};
		double ctm[] = { 100.0,   0.0,   0.0,
				 0.0,   100.0,   0.0,
				 0.0,     0.0, 100.0 };

		/* CherryView generates values on 10bits that we
		 * produce with an 8 bits per color framebuffer. */
		igt_require(!IS_CHERRYVIEW(data->devid));

		igt_assert(test_pipe_ctm(data, primary, red_green_blue,
					 full_rgb, ctm));
	}

	igt_describe("Check the color transformation for negative transparency");
	igt_subtest_f("pipe-%s-ctm-negative", kmstest_pipe_name(p)) {
		color_t all_black[] = {
			{ 0.0, 0.0, 0.0 },
			{ 0.0, 0.0, 0.0 },
			{ 0.0, 0.0, 0.0 }
		};
		double ctm[] = { -1.0,  0.0,  0.0,
				 0.0, -1.0,  0.0,
				 0.0,  0.0, -1.0 };
		igt_assert(test_pipe_ctm(data, primary, red_green_blue,
					 all_black, ctm));
	}

#if 0
	igt_subtest_f("pipe-%s-ctm-limited-range", kmstest_pipe_name(p))
		test_pipe_limited_range_ctm(data, primary);
#endif

	igt_describe("Verify that degamma LUT transformation works correctly");
	igt_subtest_f("pipe-%s-degamma", kmstest_pipe_name(p))
		test_pipe_degamma(data, primary);

	igt_describe("Verify that gamma LUT transformation works correctly");
	igt_subtest_f("pipe-%s-gamma", kmstest_pipe_name(p))
		test_pipe_gamma(data, primary);

	igt_describe("Verify that legacy gamma LUT transformation works correctly");
	igt_subtest_f("pipe-%s-legacy-gamma", kmstest_pipe_name(p))
		test_pipe_legacy_gamma(data, primary);

	igt_describe("Verify that setting the legacy gamma LUT resets the gamma LUT set through "
			"GAMMA_LUT property");
	igt_subtest_f("pipe-%s-legacy-gamma-reset", kmstest_pipe_name(p))
		test_pipe_legacy_gamma_reset(data, primary);

	igt_fixture {
		disable_degamma(primary->pipe);
		disable_gamma(primary->pipe);
		disable_ctm(primary->pipe);
		igt_display_commit(&data->display);

		igt_pipe_crc_free(data->pipe_crc);
		data->pipe_crc = NULL;
	}
}

static void
run_invalid_tests_for_pipe(data_t *data, enum pipe p)
{
	igt_fixture
		prep_pipe(data, p);

	igt_describe("Negative check for invalid gamma lut sizes");
	igt_subtest_f("pipe-%s-invalid-gamma-lut-sizes", kmstest_pipe_name(p))
		invalid_gamma_lut_sizes(data, p);

	igt_describe("Negative check for invalid degamma lut sizes");
	igt_subtest_f("pipe-%s-invalid-degamma-lut-sizes", kmstest_pipe_name(p))
		invalid_degamma_lut_sizes(data, p);

	igt_describe("Negative check for color tranformation matrix sizes");
	igt_subtest_f("pipe-%s-invalid-ctm-matrix-sizes", kmstest_pipe_name(p))
		invalid_ctm_matrix_sizes(data, p);
}

igt_main
{
	data_t data = {};
	enum pipe pipe;

	igt_fixture {
		data.drm_fd = drm_open_driver_master(DRIVER_ANY);
		if (is_i915_device(data.drm_fd))
			data.devid = intel_get_drm_devid(data.drm_fd);
		kmstest_set_vt_graphics_mode();

		igt_display_require(&data.display, data.drm_fd);
	}

	for_each_pipe_static(pipe) {
		igt_subtest_group
			run_tests_for_pipe(&data, pipe);

		igt_subtest_group
			run_invalid_tests_for_pipe(&data, pipe);
	}

	igt_fixture {
		igt_display_fini(&data.display);
	}
}