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drm/amd/display: Device flash garbage before get in OS

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[ Upstream commit 9c580e8f6cd6524d4e2c3490c440110526f7ddd6 ]

[Why]
Enabling stream with tg lock makes config settings
pending causing the garbage until tg unlock.

[How]
Keep the original lock mechanism
The driver doesn't lock tg if plane_state is null.

Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Chiawen Huang <chiawen.huang@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Chiawen Huang 2022-07-21 21:57:05 +08:00 committed by Greg Kroah-Hartman
parent ae29c0c466
commit ab01ac7fa9
1 changed files with 1 additions and 0 deletions
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1
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
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@ -108,6 +108,7 @@ void dcn10_lock_all_pipes(struct dc *dc,
*/
if (pipe_ctx->top_pipe ||
!pipe_ctx->stream ||
!pipe_ctx->plane_state ||
!tg->funcs->is_tg_enabled(tg))
continue;