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drm/amd/display: Change EDID fallback condition

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[Why]
Partially valid EDIDs on MST sinks are treated the same way as broken
EDIDs or read failures and result in a fallback EDID being used instead.

[How]
If edid_status is EDID_PARTIAL_VALID, prefer to use the valid EDID
blocks instead of using a fallback EDID.

Reviewed-by: Martin Leung <Martin.Leung@amd.com>
Acked-by: Jasdeep Dhillon <jdhillon@amd.com>
Signed-off-by: Ilya Bakoulin <Ilya.Bakoulin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Ilya Bakoulin 2022-09-13 14:56:13 -04:00 committed by Alex Deucher
parent d3d61281ed
commit 7712b0a7df
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/display/dc/core/dc.c
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@ -4006,7 +4006,7 @@ struct dc_sink *dc_link_add_remote_sink(
* Treat device as no EDID device if EDID
* parsing fails
*/
if (edid_status != EDID_OK) {
if (edid_status != EDID_OK && edid_status != EDID_PARTIAL_VALID) {
dc_sink->dc_edid.length = 0;
dm_error("Bad EDID, status%d!\n", edid_status);
}