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drm/amd/display: Add minimal pipe split transition state

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[WHY?] When adding/removng a plane to some configurations,
unsupported pipe programming can occur when moving to a new plane.

[HOW?]
Add a safe transistion state before programming new configuration.

Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Alan Liu <HaoPing.Liu@amd.com>
Signed-off-by: Dillon Varone <dillon.varone@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Dillon Varone 2022-02-17 15:33:03 -05:00 committed by Alex Deucher
parent dbede77ce3
commit 3741584519
1 changed files with 6 additions and 3 deletions

9
drivers/gpu/drm/amd/display/dc/core/dc.c
View File

@ -1082,7 +1082,8 @@ static void disable_dangling_plane(struct dc *dc, struct dc_state *context)
break;
}
}
if (!should_disable && pipe_split_change)
if (!should_disable && pipe_split_change &&
dc->current_state->stream_count != context->stream_count)
should_disable = true;
if (should_disable && old_stream) {
@ -1690,6 +1691,7 @@ static enum dc_status dc_commit_state_no_check(struct dc *dc, struct dc_state *c
struct pipe_ctx *pipe;
int i, k, l;
struct dc_stream_state *dc_streams[MAX_STREAMS] = {0};
struct dc_state *old_state;
#if defined(CONFIG_DRM_AMD_DC_DCN)
dc_z10_restore(dc);
@ -1808,10 +1810,11 @@ static enum dc_status dc_commit_state_no_check(struct dc *dc, struct dc_state *c
for (i = 0; i < context->stream_count; i++)
context->streams[i]->mode_changed = false;
dc_release_state(dc->current_state);
old_state = dc->current_state;
dc->current_state = context;
dc_release_state(old_state);
dc_retain_state(dc->current_state);
return result;