https://github.com/torvalds/linux
Revision a6e1775da04ab042bc9e2e42399fa25714c253da authored by Tsung-hua Lin on 09 November 2022, 04:54:22 UTC, committed by Alex Deucher on 23 November 2022, 14:01:53 UTC
[why]
First MST sideband message returns AUX_RET_ERROR_HPD_DISCON
on certain intel platform. Aux transaction considered failure
if HPD unexpected pulled low. The actual aux transaction success
in such case, hence do not return error.

[how]
Not returning error when AUX_RET_ERROR_HPD_DISCON detected
on the first sideband message.

v2: squash in fix (Alex)

Reviewed-by: Jerry Zuo <Jerry.Zuo@amd.com>
Acked-by: Brian Chang <Brian.Chang@amd.com>
Signed-off-by: Tsung-hua Lin <Tsung-hua.Lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
1 parent 3cb93f3
History
Tip revision: a6e1775da04ab042bc9e2e42399fa25714c253da authored by Tsung-hua Lin on 09 November 2022, 04:54:22 UTC
drm/amd/display: No display after resume from WB/CB
Tip revision: a6e1775
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