From: Loan Chen lo-an.chen@amd.com

[Why] Tiled display cannot synchronize properly after S3. The fix for commit 5f0c74915815 ("drm/amd/display: Fix for otg synchronization logic") is not enable in DCN321, which causes the otg is excluded from synchronization.

[How] Enable otg synchronization logic in dcn321.

Fixes: 5f0c74915815 ("drm/amd/display: Fix for otg synchronization logic") Cc: Mario Limonciello mario.limonciello@amd.com Cc: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org Reviewed-by: Alvin Lee alvin.lee2@amd.com Signed-off-by: Loan Chen lo-an.chen@amd.com Signed-off-by: Tom Chung chiahsuan.chung@amd.com --- .../gpu/drm/amd/display/dc/resource/dcn321/dcn321_resource.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/resource/dcn321/dcn321_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dcn321/dcn321_resource.c index a414ed60a724..827a94f84f10 100644 --- a/drivers/gpu/drm/amd/display/dc/resource/dcn321/dcn321_resource.c +++ b/drivers/gpu/drm/amd/display/dc/resource/dcn321/dcn321_resource.c @@ -1778,6 +1778,9 @@ static bool dcn321_resource_construct( dc->caps.color.mpc.ogam_rom_caps.hlg = 0; dc->caps.color.mpc.ocsc = 1;

+ /* Use pipe context based otg sync logic */ + dc->config.use_pipe_ctx_sync_logic = true; + dc->config.dc_mode_clk_limit_support = true; dc->config.enable_windowed_mpo_odm = true; dc->config.disable_hbr_audio_dp2 = true;