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| author | Eric Yang <Eric.Yang2@amd.com> | 2021-06-23 22:48:02 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-07-21 21:21:59 +0300 |
| commit | 32f1d0cfc3444fb44ff1dba10d28e479690bdd3e (patch) | |
| tree | 0674f7d74fdf34b792dcccfdd78d555a8e81a88e /drivers/nubus/bus.c | |
| parent | ec3102dc6b36c692104c4a0546d4119de59a3bc1 (diff) | |
| download | linux-32f1d0cfc3444fb44ff1dba10d28e479690bdd3e.tar.xz | |
drm/amd/display: implement workaround for riommu related hang
[Why]
During S4/S5/reboot, sometimes riommu invalidation request arrive too
early, DCN may be unable to respond to the invalidation request
resulting in pstate hang.
[How]
VBIOS will force allow pstate for riommu invalidation and driver will
clear it after powering down display pipes.
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Eric Yang <Eric.Yang2@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/nubus/bus.c')
0 files changed, 0 insertions, 0 deletions