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| author | George Shen <george.shen@amd.com> | 2023-04-13 19:03:59 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-06-09 09:28:20 -0400 |
| commit | 124155c0bd4a4ed822c1ba246bdf5123b42c3ad9 (patch) | |
| tree | 62cf3c5984660c5241ff0bc921f29b7ed3fd068a /drivers/gpu/drm/amd/display/dc/link | |
| parent | 029c85adccb2e23352f622394288ecd133449332 (diff) | |
| download | linux-stable-124155c0bd4a4ed822c1ba246bdf5123b42c3ad9.tar.gz linux-stable-124155c0bd4a4ed822c1ba246bdf5123b42c3ad9.tar.bz2 linux-stable-124155c0bd4a4ed822c1ba246bdf5123b42c3ad9.zip | |
drm/amd/display: Add w/a to disable DP dual mode on certain ports
[Why]
Certain ports on DCN3.2 configs do not properly populate the BIOS
info table flag to indicate DP dual mode is unsupported.
[How]
Add a workaround to disable DP dual mode on the ports with the missing
BIOS info table flag.
Reviewed-by: Michael Strauss <Michael.Strauss@amd.com>
Acked-by: Alan Liu <HaoPing.Liu@amd.com>
Signed-off-by: George Shen <george.shen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/link')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/link/link_detection.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_detection.c b/drivers/gpu/drm/amd/display/dc/link/link_detection.c index a131e30fd7d6..17904de4f155 100644 --- a/drivers/gpu/drm/amd/display/dc/link/link_detection.c +++ b/drivers/gpu/drm/amd/display/dc/link/link_detection.c @@ -593,6 +593,10 @@ static bool detect_dp(struct dc_link *link, /* DP SST branch */ link->type = dc_connection_sst_branch; } else { + if (link->dc->debug.disable_dp_plus_plus_wa && + link->link_enc->features.flags.bits.IS_UHBR20_CAPABLE) + return false; + /* DP passive dongles */ sink_caps->signal = dp_passive_dongle_detection(link->ddc, sink_caps, |