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| author | Wayne Lin <wayne.lin@amd.com> | 2022-03-09 17:05:05 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-07-18 11:12:50 -0400 |
| commit | bb4fa525f327730e718b2d6e473e608da8eaa894 (patch) | |
| tree | 01a13d7a9344c6dfeb8004eeca3a3e6511453e2a /drivers/gpu/drm/amd/display/dc/basics | |
| parent | c4e532f75336ad03a4d7248b38fa56091dbaeba4 (diff) | |
| download | linux-bb4fa525f327730e718b2d6e473e608da8eaa894.tar.gz linux-bb4fa525f327730e718b2d6e473e608da8eaa894.tar.bz2 linux-bb4fa525f327730e718b2d6e473e608da8eaa894.zip | |
drm/amd/display: Add polling method to handle MST reply packet
[Why]
Specific TBT4 dock doesn't send out short HPD to notify source
that IRQ event DOWN_REP_MSG_RDY is set. Which violates the spec
and cause source can't send out streams to mst sinks.
[How]
To cover this misbehavior, add an additional polling method to detect
DOWN_REP_MSG_RDY is set. HPD driven handling method is still kept.
Just hook up our handler to drm mgr->cbs->poll_hpd_irq().
Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Reviewed-by: Jerry Zuo <jerry.zuo@amd.com>
Acked-by: Alan Liu <haoping.liu@amd.com>
Signed-off-by: Wayne Lin <wayne.lin@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/dc/basics')
0 files changed, 0 insertions, 0 deletions