Commit 4c6a9618 authored by Alvin Lee's avatar Alvin Lee Committed by Alex Deucher

drm/amd/display: Wait for flip to complete

[why]
In pipe split issue occurs when we program immediate flip while vsync flip is pending

[how]
Don't program immediate flip until flip is no longer pending
Signed-off-by: default avatarAlvin Lee <alvin.lee2@amd.com>
Reviewed-by: default avatarJaehyun Chung <Jaehyun.Chung@amd.com>
Acked-by: default avatarLeo Li <sunpeng.li@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 351960b0
...@@ -1308,6 +1308,17 @@ void dcn20_pipe_control_lock( ...@@ -1308,6 +1308,17 @@ void dcn20_pipe_control_lock(
if (pipe->plane_state != NULL) if (pipe->plane_state != NULL)
flip_immediate = pipe->plane_state->flip_immediate; flip_immediate = pipe->plane_state->flip_immediate;
if (flip_immediate && lock) {
while (pipe->plane_res.hubp->funcs->hubp_is_flip_pending(pipe->plane_res.hubp)) {
udelay(1);
}
if (pipe->bottom_pipe != NULL)
while (pipe->bottom_pipe->plane_res.hubp->funcs->hubp_is_flip_pending(pipe->bottom_pipe->plane_res.hubp)) {
udelay(1);
}
}
/* In flip immediate and pipe splitting case, we need to use GSL /* In flip immediate and pipe splitting case, we need to use GSL
* for synchronization. Only do setup on locking and on flip type change. * for synchronization. Only do setup on locking and on flip type change.
*/ */
......
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