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drm/amd/display: Set flip pending for pipe split 

[WHY]
When doing split pipe, if one pipe is pending on flip, the entire
plane's status should be flip pending, otherwise corruption can occur
when OS writes to a surface prematurely.

[HOW]
Clear the flip pending bit before checking pipes, then OR the flip
pending bits from all pipes together to create the flip pending status
of the entire plane.

Signed-off-by: Wesley Chalmers <Wesley.Chalmers@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Eryk Brol <Eryk.Brol@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Wesley Chalmers 2019-02-06 13:19:08 -05:00 committed by Alex Deucher
parent dcf1a98867
commit 128c075ad4
2 changed files with 14 additions and 1 deletions
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13
drivers/gpu/drm/amd/display/dc/core/dc_surface.c
View File

@ -119,6 +119,19 @@ const struct dc_plane_status *dc_plane_get_status(
if (core_dc->current_state == NULL)
return NULL;
/* Find the current plane state and set its pending bit to false */
for (i = 0; i < core_dc->res_pool->pipe_count; i++) {
struct pipe_ctx *pipe_ctx =
&core_dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx->plane_state != plane_state)
continue;
pipe_ctx->plane_state->status.is_flip_pending = false;
break;
}
for (i = 0; i < core_dc->res_pool->pipe_count; i++) {
struct pipe_ctx *pipe_ctx =
&core_dc->current_state->res_ctx.pipe_ctx[i];

2
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
View File

@ -2689,7 +2689,7 @@ static void dcn10_update_pending_status(struct pipe_ctx *pipe_ctx)
flip_pending = pipe_ctx->plane_res.hubp->funcs->hubp_is_flip_pending(
pipe_ctx->plane_res.hubp);
plane_state->status.is_flip_pending = flip_pending;
plane_state->status.is_flip_pending = plane_state->status.is_flip_pending || flip_pending;
if (!flip_pending)
plane_state->status.current_address = plane_state->status.requested_address;