From: Nicholas Kazlauskas nicholas.kazlauskas@amd.com
[ Upstream commit 710cc1e7cd461446a9325c9bd1e9a54daa462952 ]
[Why] The bit for flip addr is being set causing the determination for FAST vs MEDIUM to always return MEDIUM when plane info is provided as a surface update. This causes extreme stuttering for the typical atomic update path on Linux.
[How] Don't use update_flags->raw for determining FAST vs MEDIUM. It's too fragile to changes like this.
Explicitly specify the update type per update flag instead. It's not as clever as checking the bits itself but at least it's correct.
Fixes: aa5fdb1ab5b6 ("drm/amd/display: Explicitly specify update type per plane info change") Reviewed-by: Rodrigo Siqueira Rodrigo.Siqueira@amd.com Signed-off-by: Nicholas Kazlauskas nicholas.kazlauskas@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 | 3 --- 1 file changed, 3 deletions(-)
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -2540,9 +2540,6 @@ static enum surface_update_type det_surf enum surface_update_type overall_type = UPDATE_TYPE_FAST; union surface_update_flags *update_flags = &u->surface->update_flags;
- if (u->flip_addr) - update_flags->bits.addr_update = 1; - if (!is_surface_in_context(context, u->surface) || u->surface->force_full_update) { update_flags->raw = 0xFFFFFFFF; return UPDATE_TYPE_FULL;