drm/amd/display: Propagate HDMI RGB quantization selectability

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DC uses dc_edid_caps.qs_bit when constructing the HDMI AVI InfoFrame
quantization-range field. Although DRM parses the sink capability into
drm_display_info, DM never copies it into the DC EDID capabilities. The
field therefore remains zero and the AVI quantization range stays at its
default value.

Copy rgb_quant_range_selectable for HDMI sinks and extend the existing
EDID-capability KUnit test to cover it.

Fixes: 6eb4c13a38 ("drm/amd/display: Support "Broadcast RGB" drm property")
Signed-off-by: Satyajit Roy <sroy14@alum.utk.edu>
Reviewed-by: Alex Hung <alex.hung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Satyajit Roy 2026-08-30 03:51:58 +00:00 • committed by Alex Deucher

parent a2aafaeb2b

commit 892659399f

2 changed files with 3 additions and 0 deletions

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1

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c

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2

drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_helpers_test.c

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