drm/amd/display: Honor Broadcast RGB for BT.2020 RGB output

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amdgpu_dm_get_output_color_space() applies the Broadcast RGB connector
property to default RGB output, but always selects full-range output for
BT.2020 RGB. Consequently, explicitly selecting Limited has no effect on
the output CSC or AVI InfoFrame when HDR uses BT.2020 RGB.

Select COLOR_SPACE_2020_RGB_LIMITEDRANGE when the output encoding is RGB
and Broadcast RGB is Limited. Keep Automatic and Full at full range, and
leave YCbCr output unchanged.

Add KUnit coverage for limited-range RGB output through both BT.2020
connector colorspace values.

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 03:52:06 +00:00 • committed by Alex Deucher

parent 892659399f

commit 022236eaa6

2 changed files with 44 additions and 3 deletions

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10

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

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37

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

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