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| author | Ilya <Ilya.Bakoulin@amd.com> | 2022-02-10 11:09:33 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2022-02-23 14:22:03 -0500 |
| commit | 10a9accd4842e6098cc27d79d43d7542254003bc (patch) | |
| tree | dd8197a1380d55be8e766a5c060ec40225b54c2e /drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | |
| parent | 3e6084aee08b108f5cc489be46c68ba56b13e52e (diff) | |
| download | linux-10a9accd4842e6098cc27d79d43d7542254003bc.tar.gz linux-10a9accd4842e6098cc27d79d43d7542254003bc.tar.bz2 linux-10a9accd4842e6098cc27d79d43d7542254003bc.zip | |
drm/amd/display: Fix wrong resolution with DP/VGA adapter
[Why]
Hotplugging the VGA side of some DP/VGA adapters caused the display to
light up with the wrong (non-native) resolution.
This is caused by the adapter misbehaving by reporting the wrong number
of downstream ports when the VGA side is unplugged (reports 1 instead of
0), but only if the SINK_COUNT DPCD register is read more than once.
[How]
To work around the adapter behavior, remove the sink if link is
detected, but EDID cannot be read.
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Solomon Chiu <solomon.chiu@amd.com>
Signed-off-by: Ilya <Ilya.Bakoulin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c')
0 files changed, 0 insertions, 0 deletions