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CTRY:US; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:SATLEXMB04.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230040)(1800799024)(82310400026)(36860700013)(376014)(7416014); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Mar 2025 23:53:03.9376 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7563f14c-c2be-4179-1585-08dd6cc15957 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL02EPF0001A0FC.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR12MB4129 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Harry Wentland A whole slew of tests for CTM handling that greatly helped in debugging the CTM code. The extent of tests might seem a bit silly but they're fast and might someday help save someone else's day when debugging this. Reviewed-by: Louis Chauvet Signed-off-by: Alex Hung Signed-off-by: Harry Wentland --- v7: - Fix a checkpatch a long-line warning (Louis Chauvet) v6: - update reference values since we're now rounding v5: - Make apply_3x4_matrix static v4: - Comment on origin of bt709_enc matrix (Pekka) - Use full opaque alpha (Pekka) - Add additional check for Y < 0xffff (Pekka) - Remove unused code (Pekka) drivers/gpu/drm/vkms/tests/vkms_color_test.c | 250 +++++++++++++++++++ drivers/gpu/drm/vkms/vkms_composer.c | 4 +- drivers/gpu/drm/vkms/vkms_composer.h | 1 + 3 files changed, 254 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/vkms/tests/vkms_color_test.c b/drivers/gpu/drm/vkms/tests/vkms_color_test.c index 02fbe19c744a..a9c3af5025b3 100644 --- a/drivers/gpu/drm/vkms/tests/vkms_color_test.c +++ b/drivers/gpu/drm/vkms/tests/vkms_color_test.c @@ -190,11 +190,261 @@ static void vkms_color_srgb_inv_srgb(struct kunit *test) } } +#define FIXPT_HALF (DRM_FIXED_ONE >> 1) +#define FIXPT_QUARTER (DRM_FIXED_ONE >> 2) + +static const struct drm_color_ctm_3x4 test_matrix_3x4_50_desat = { { + FIXPT_HALF, FIXPT_QUARTER, FIXPT_QUARTER, 0, + FIXPT_QUARTER, FIXPT_HALF, FIXPT_QUARTER, 0, + FIXPT_QUARTER, FIXPT_QUARTER, FIXPT_HALF, 0 +} }; + +static void vkms_color_ctm_3x4_50_desat(struct kunit *test) +{ + struct pixel_argb_s32 ref, out; + + /* full white */ + ref.a = 0xffff; + ref.r = 0xffff; + ref.g = 0xffff; + ref.b = 0xffff; + + memcpy(&out, &ref, sizeof(out)); + apply_3x4_matrix(&out, &test_matrix_3x4_50_desat); + + KUNIT_EXPECT_MEMEQ(test, &ref, &out, sizeof(out)); + + /* full black */ + ref.a = 0xffff; + ref.r = 0x0; + ref.g = 0x0; + ref.b = 0x0; + + memcpy(&out, &ref, sizeof(out)); + apply_3x4_matrix(&out, &test_matrix_3x4_50_desat); + + KUNIT_EXPECT_MEMEQ(test, &ref, &out, sizeof(out)); + + /* 50% grey */ + ref.a = 0xffff; + ref.r = 0x8000; + ref.g = 0x8000; + ref.b = 0x8000; + + memcpy(&out, &ref, sizeof(out)); + apply_3x4_matrix(&out, &test_matrix_3x4_50_desat); + + KUNIT_EXPECT_MEMEQ(test, &ref, &out, sizeof(out)); + + /* full red to 50% desat */ + ref.a = 0xffff; + ref.r = 0x8000; + ref.g = 0x4000; + ref.b = 0x4000; + + out.a = 0xffff; + out.r = 0xffff; + out.g = 0x0; + out.b = 0x0; + + apply_3x4_matrix(&out, &test_matrix_3x4_50_desat); + + KUNIT_EXPECT_MEMEQ(test, &ref, &out, sizeof(out)); +} + +/* + * BT.709 encoding matrix + * + * Values printed from within IGT when converting + * igt_matrix_3x4_bt709_enc to the fixed-point format expected + * by DRM/KMS. + */ +static const struct drm_color_ctm_3x4 test_matrix_3x4_bt709_enc = { { + 0x00000000366cf400ull, 0x00000000b7175900ull, 0x0000000127bb300ull, 0, + 0x800000001993b3a0ull, 0x800000005609fe80ull, 0x000000006f9db200ull, 0, + 0x000000009d70a400ull, 0x800000008f011100ull, 0x800000000e6f9330ull, 0 +} }; + +static void vkms_color_ctm_3x4_bt709(struct kunit *test) +{ + struct pixel_argb_s32 out; + + /* full white to bt709 */ + out.a = 0xffff; + out.r = 0xffff; + out.g = 0xffff; + out.b = 0xffff; + + apply_3x4_matrix(&out, &test_matrix_3x4_bt709_enc); + + /* Y 255 */ + KUNIT_EXPECT_GT(test, out.r, 0xfe00); + KUNIT_EXPECT_LT(test, out.r, 0x10000); + + /* U 0 */ + KUNIT_EXPECT_LT(test, out.g, 0x0100); + + /* V 0 */ + KUNIT_EXPECT_LT(test, out.b, 0x0100); + + /* full black to bt709 */ + out.a = 0xffff; + out.r = 0x0; + out.g = 0x0; + out.b = 0x0; + + apply_3x4_matrix(&out, &test_matrix_3x4_bt709_enc); + + /* Y 0 */ + KUNIT_EXPECT_LT(test, out.r, 0x100); + + /* U 0 */ + KUNIT_EXPECT_LT(test, out.g, 0x0100); + + /* V 0 */ + KUNIT_EXPECT_LT(test, out.b, 0x0100); + + /* gray to bt709 */ + out.a = 0xffff; + out.r = 0x7fff; + out.g = 0x7fff; + out.b = 0x7fff; + + apply_3x4_matrix(&out, &test_matrix_3x4_bt709_enc); + + /* Y 127 */ + KUNIT_EXPECT_GT(test, out.r, 0x7e00); + KUNIT_EXPECT_LT(test, out.r, 0x8000); + + /* U 0 */ + KUNIT_EXPECT_LT(test, out.g, 0x0100); + + /* V 0 */ + KUNIT_EXPECT_LT(test, out.b, 0x0100); + + /* == red 255 - bt709 enc == */ + out.a = 0xffff; + out.r = 0xffff; + out.g = 0x0; + out.b = 0x0; + + apply_3x4_matrix(&out, &test_matrix_3x4_bt709_enc); + + /* Y 54 */ + KUNIT_EXPECT_GT(test, out.r, 0x3500); + KUNIT_EXPECT_LT(test, out.r, 0x3700); + + /* U 0 */ + KUNIT_EXPECT_LT(test, out.g, 0x0100); + + /* V 157 */ + KUNIT_EXPECT_GT(test, out.b, 0x9C00); + KUNIT_EXPECT_LT(test, out.b, 0x9E00); + + + /* == green 255 - bt709 enc == */ + out.a = 0xffff; + out.r = 0x0; + out.g = 0xffff; + out.b = 0x0; + + apply_3x4_matrix(&out, &test_matrix_3x4_bt709_enc); + + /* Y 182 */ + KUNIT_EXPECT_GT(test, out.r, 0xB500); + KUNIT_EXPECT_LT(test, out.r, 0xB780); /* laxed by half*/ + + /* U 0 */ + KUNIT_EXPECT_LT(test, out.g, 0x0100); + + /* V 0 */ + KUNIT_EXPECT_LT(test, out.b, 0x0100); + + /* == blue 255 - bt709 enc == */ + out.a = 0xffff; + out.r = 0x0; + out.g = 0x0; + out.b = 0xffff; + + apply_3x4_matrix(&out, &test_matrix_3x4_bt709_enc); + + /* Y 18 */ + KUNIT_EXPECT_GT(test, out.r, 0x1100); + KUNIT_EXPECT_LT(test, out.r, 0x1300); + + /* U 111 */ + KUNIT_EXPECT_GT(test, out.g, 0x6E00); + KUNIT_EXPECT_LT(test, out.g, 0x7000); + + /* V 0 */ + KUNIT_EXPECT_LT(test, out.b, 0x0100); + + /* == red 140 - bt709 enc == */ + out.a = 0xffff; + out.r = 0x8c8c; + out.g = 0x0; + out.b = 0x0; + + apply_3x4_matrix(&out, &test_matrix_3x4_bt709_enc); + + /* Y 30 */ + KUNIT_EXPECT_GT(test, out.r, 0x1D00); + KUNIT_EXPECT_LT(test, out.r, 0x1F00); + + /* U 0 */ + KUNIT_EXPECT_LT(test, out.g, 0x100); + + /* V 87 */ + KUNIT_EXPECT_GT(test, out.b, 0x5600); + KUNIT_EXPECT_LT(test, out.b, 0x5800); + + /* == green 140 - bt709 enc == */ + out.a = 0xffff; + out.r = 0x0; + out.g = 0x8c8c; + out.b = 0x0; + + apply_3x4_matrix(&out, &test_matrix_3x4_bt709_enc); + + /* Y 30 */ + KUNIT_EXPECT_GT(test, out.r, 0x6400); + KUNIT_EXPECT_LT(test, out.r, 0x6600); + + /* U 0 */ + KUNIT_EXPECT_LT(test, out.g, 0x100); + + /* V 0 */ + KUNIT_EXPECT_LT(test, out.b, 0x100); + + + /* == blue 140 - bt709 enc == */ + out.a = 0xffff; + out.r = 0x0; + out.g = 0x0; + out.b = 0x8c8c; + + apply_3x4_matrix(&out, &test_matrix_3x4_bt709_enc); + + /* Y 30 */ + KUNIT_EXPECT_GT(test, out.r, 0x900); + KUNIT_EXPECT_LT(test, out.r, 0xB00); + + /* U 61 */ + KUNIT_EXPECT_GT(test, out.g, 0x3C00); + KUNIT_EXPECT_LT(test, out.g, 0x3E00); + + /* V 0 */ + KUNIT_EXPECT_LT(test, out.b, 0x100); + +} + static struct kunit_case vkms_color_test_cases[] = { KUNIT_CASE(vkms_color_test_get_lut_index), KUNIT_CASE(vkms_color_test_lerp), KUNIT_CASE(vkms_color_test_linear), KUNIT_CASE(vkms_color_srgb_inv_srgb), + KUNIT_CASE(vkms_color_ctm_3x4_50_desat), + KUNIT_CASE(vkms_color_ctm_3x4_bt709), {} }; diff --git a/drivers/gpu/drm/vkms/vkms_composer.c b/drivers/gpu/drm/vkms/vkms_composer.c index 8fe16d26d680..54fd00b49360 100644 --- a/drivers/gpu/drm/vkms/vkms_composer.c +++ b/drivers/gpu/drm/vkms/vkms_composer.c @@ -128,7 +128,8 @@ static void apply_lut(const struct vkms_crtc_state *crtc_state, struct line_buff } } -static void apply_3x4_matrix(struct pixel_argb_s32 *pixel, const struct drm_color_ctm_3x4 *matrix) +VISIBLE_IF_KUNIT void apply_3x4_matrix(struct pixel_argb_s32 *pixel, + const struct drm_color_ctm_3x4 *matrix) { s64 rf, gf, bf; s64 r, g, b; @@ -156,6 +157,7 @@ static void apply_3x4_matrix(struct pixel_argb_s32 *pixel, const struct drm_colo pixel->g = drm_fixp2int_round(gf); pixel->b = drm_fixp2int_round(bf); } +EXPORT_SYMBOL_IF_KUNIT(apply_3x4_matrix); static void apply_colorop(struct pixel_argb_s32 *pixel, struct drm_colorop *colorop) { diff --git a/drivers/gpu/drm/vkms/vkms_composer.h b/drivers/gpu/drm/vkms/vkms_composer.h index 67ae09913460..afef65a5c3ba 100644 --- a/drivers/gpu/drm/vkms/vkms_composer.h +++ b/drivers/gpu/drm/vkms/vkms_composer.h @@ -21,6 +21,7 @@ u16 lerp_u16(u16 a, u16 b, s64 t); s64 get_lut_index(const struct vkms_color_lut *lut, u16 channel_value); u16 apply_lut_to_channel_value(const struct vkms_color_lut *lut, u16 channel_value, enum lut_channel channel); +void apply_3x4_matrix(struct pixel_argb_s32 *pixel, const struct drm_color_ctm_3x4 *matrix); #endif #endif /* _VKMS_COMPOSER_H_ */