From: Anthony Wang anthony1.wang@amd.com

[ Upstream commit 56d63782af9bbd1271bff1422a6a013123eade4d ]

[Why] Underflow observed when disabling PIP overlay in-game when vsync is disabled, due to OTC master lock not working with game pipe which is immediate flip.

[How] When performing a full update, override flip_immediate value to false for all planes, so that flip occurs on vsync.

Signed-off-by: Anthony Wang anthony1.wang@amd.com Acked-by: Bindu Ramamurthy bindur12@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 --- drivers/gpu/drm/amd/display/dc/core/dc.c | 4 ++++ 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index ffb21196bf59..b82c6f2cd986 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -2503,6 +2503,10 @@ static void commit_planes_for_stream(struct dc *dc, plane_state->triplebuffer_flips = true; } } + if (update_type == UPDATE_TYPE_FULL) { + /* force vsync flip when reconfiguring pipes to prevent underflow */ + plane_state->flip_immediate = false; + } } }