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drm/amd/display: Add flag to disable dynamic expansion for 12bpc

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[Why]
Dynamic expansion is not needed when outputting 12bpc test patterns.

[How]
Add a debug flag to control disabling dynamic expansion in the case
of 12bpc test patterns.

Reviewed-by: Michael Strauss <michael.strauss@amd.com>
Signed-off-by: George Shen <george.shen@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>
This commit is contained in:
George Shen 2026-04-21 20:27:42 -04:00 committed by Alex Deucher
parent 932d6696d5
commit 073875c5d2
2 changed files with 19 additions and 0 deletions
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1
drivers/gpu/drm/amd/display/dc/dc.h
View File

@ -1288,6 +1288,7 @@ struct dc_debug_options {
unsigned int force_odm2to1_for_edp_pixclk_mhz;
bool enable_replay_esd_recovery;
uint8_t iommu_mismatch_temp_wka;
bool disable_dynamic_expansion_for_test_pattern;
};

18
drivers/gpu/drm/amd/display/dc/opp/dcn20/dcn20_opp.c
View File

@ -89,6 +89,24 @@ void opp2_set_disp_pattern_generator(
break;
}
if (opp->ctx->dc->debug.disable_dynamic_expansion_for_test_pattern) {
switch (test_pattern) {
case CONTROLLER_DP_TEST_PATTERN_COLORSQUARES:
case CONTROLLER_DP_TEST_PATTERN_COLORSQUARES_CEA:
case CONTROLLER_DP_TEST_PATTERN_VERTICALBARS:
case CONTROLLER_DP_TEST_PATTERN_HORIZONTALBARS:
case CONTROLLER_DP_TEST_PATTERN_COLORRAMP:
if (color_depth == COLOR_DEPTH_121212)
REG_UPDATE(FMT_DYNAMIC_EXP_CNTL, FMT_DYNAMIC_EXP_EN, 0);
break;
case CONTROLLER_DP_TEST_PATTERN_VIDEOMODE:
REG_UPDATE(FMT_DYNAMIC_EXP_CNTL, FMT_DYNAMIC_EXP_EN, 1);
break;
default:
break;
}
}
/* set DPG dimentions */
REG_SET_2(DPG_DIMENSIONS, 0,
DPG_ACTIVE_WIDTH, width,