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author | David Francis <David.Francis@amd.com> | 2019-03-29 18:23:15 +0100 |
---|---|---|
committer | Alex Deucher <alexander.deucher@amd.com> | 2019-04-15 06:45:43 +0200 |
commit | c238bfe0be9ef7420f7669a69e27c8c8f4d8a568 (patch) | |
tree | b8c8c72824a45f7331cef1ce4a110dd98b4d2a20 /drivers/pinctrl/spear | |
parent | drm/amdgpu/gmc9: fix VM_L2_CNTL3 programming (diff) | |
download | linux-c238bfe0be9ef7420f7669a69e27c8c8f4d8a568.tar.xz linux-c238bfe0be9ef7420f7669a69e27c8c8f4d8a568.zip |
drm/amd/display: If one stream full updates, full update all planes
[Why]
On some compositors, with two monitors attached, VT terminal
switch can cause a graphical issue by the following means:
There are two streams, one for each monitor. Each stream has one
plane
current state:
M1:S1->P1
M2:S2->P2
The user calls for a terminal switch and a commit is made to
change both planes to linear swizzle mode. In atomic check,
a new dc_state is constructed with new planes on each stream
new state:
M1:S1->P3
M2:S2->P4
In commit tail, each stream is committed, one at a time. The first
stream (S1) updates properly, triggerring a full update and replacing
the state
current state:
M1:S1->P3
M2:S2->P4
The update for S2 comes in, but dc detects that there is no difference
between the stream and plane in the new and current states, and so
triggers a fast update. The fast update does not program swizzle,
so the second monitor is corrupted
[How]
Add a flag to dc_plane_state that forces full updates
When a stream undergoes a full update, set this flag on all changed
planes, then clear it on the current stream
Subsequent streams will get full updates as a result
Signed-off-by: David Francis <David.Francis@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Roman Li <Roman.Li@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet Lakha@amd.com>
Acked-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions