diff options
| author | Michael Strauss <michael.strauss@amd.com> | 2026-02-19 11:15:24 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-07-01 11:16:30 -0400 |
| commit | d613cf73a97c396a2a8ba2badd48cc27af38a265 (patch) | |
| tree | 711109985e96ffe771ea0febba035b93161f68cc /drivers/gpu/drm/amd/display | |
| parent | adda7c46500a57b84bd9cbc9d94d8e8ab71ad724 (diff) | |
| download | linux-next-d613cf73a97c396a2a8ba2badd48cc27af38a265.tar.gz linux-next-d613cf73a97c396a2a8ba2badd48cc27af38a265.zip | |
drm/amd/display: Add 12bpc Color Ramp Support
[WHY]
12bpc color ramp pattern was never implemented.
[HOW]
Add correct DPG_RAMP_CONTROL programming to match DP color ramp spec.
Reviewed-by: George Shen <george.shen@amd.com>
Signed-off-by: Michael Strauss <michael.strauss@amd.com>
Signed-off-by: George Zhang <george.zhang@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/opp/dcn20/dcn20_opp.c | 33 |
1 files changed, 25 insertions, 8 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/opp/dcn20/dcn20_opp.c b/drivers/gpu/drm/amd/display/dc/opp/dcn20/dcn20_opp.c index 83730bbe26a8..50b6973ef123 100644 --- a/drivers/gpu/drm/amd/display/dc/opp/dcn20/dcn20_opp.c +++ b/drivers/gpu/drm/amd/display/dc/opp/dcn20/dcn20_opp.c @@ -149,6 +149,9 @@ void opp2_set_disp_pattern_generator( case TEST_PATTERN_COLOR_FORMAT_BPC_10: dst_bpc = 10; break; + case TEST_PATTERN_COLOR_FORMAT_BPC_12: + dst_bpc = 12; + break; default: dst_bpc = 8; break; @@ -192,22 +195,25 @@ void opp2_set_disp_pattern_generator( case CONTROLLER_DP_TEST_PATTERN_COLORRAMP: { - mode = (bit_depth == - TEST_PATTERN_COLOR_FORMAT_BPC_10 ? - TEST_PATTERN_MODE_DUALRAMP_RGB : - TEST_PATTERN_MODE_SINGLERAMP_RGB); - switch (bit_depth) { case TEST_PATTERN_COLOR_FORMAT_BPC_6: + mode = TEST_PATTERN_MODE_SINGLERAMP_RGB; dst_bpc = 6; break; case TEST_PATTERN_COLOR_FORMAT_BPC_8: + mode = TEST_PATTERN_MODE_SINGLERAMP_RGB; dst_bpc = 8; break; case TEST_PATTERN_COLOR_FORMAT_BPC_10: + mode = TEST_PATTERN_MODE_DUALRAMP_RGB; dst_bpc = 10; break; + case TEST_PATTERN_COLOR_FORMAT_BPC_12: + mode = TEST_PATTERN_MODE_DUALRAMP_RGB; + dst_bpc = 12; + break; default: + mode = TEST_PATTERN_MODE_SINGLERAMP_RGB; dst_bpc = 8; break; } @@ -244,9 +250,20 @@ void opp2_set_disp_pattern_generator( case TEST_PATTERN_COLOR_FORMAT_BPC_10: { REG_SET_3(DPG_RAMP_CONTROL, 0, - DPG_RAMP0_OFFSET, 384 << 6, - DPG_INC0, inc_base, - DPG_INC1, inc_base + 2); + DPG_RAMP0_OFFSET, 384 << inc_base, // 384 start point + DPG_INC0, inc_base, // step size of 1 + DPG_INC1, inc_base + 2); // step size of 4 (1 << 2) + REG_UPDATE_2(DPG_CONTROL, + DPG_VRES, 5, + DPG_HRES, 8); + } + break; + case TEST_PATTERN_COLOR_FORMAT_BPC_12: + { + REG_SET_3(DPG_RAMP_CONTROL, 0, + DPG_RAMP0_OFFSET, 1920 << inc_base, // 1920 start point + DPG_INC0, inc_base, // step size of 1 + DPG_INC1, inc_base + 4); // step size of 16 (1 << 4) REG_UPDATE_2(DPG_CONTROL, DPG_VRES, 5, DPG_HRES, 8); |