[PATCH 01/30] drm/amd/display: Trigger full update after DCC on/off

[Stylon Wang]

From: Jake Wang <haonan.wang2 at amd.com>

[Why]
During DCC on/off, stutter period is calculated before DCC has fully transitioned.
This results in incorrect stutter period calculation.

[How]
Trigger a full update when DCC changes between on/off.

Signed-off-by: Jake Wang <haonan.wang2 at amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr at amd.com>
Acked-by: Stylon Wang <stylon.wang at amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 34c207f92df9..156ba8d3d4dc 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -1918,8 +1918,13 @@ static enum surface_update_type get_plane_info_update_type(const struct dc_surfa
 	if (u->plane_info->dcc.enable != u->surface->dcc.enable
 			|| u->plane_info->dcc.independent_64b_blks != u->surface->dcc.independent_64b_blks
 			|| u->plane_info->dcc.meta_pitch != u->surface->dcc.meta_pitch) {
+		/* During DCC on/off, stutter period is calculated before
+		 * DCC has fully transitioned. This results in incorrect
+		 * stutter period calculation. Triggering a full update will
+		 * recalculate stutter period.
+		 */
 		update_flags->bits.dcc_change = 1;
-		elevate_update_type(&update_type, UPDATE_TYPE_MED);
+		elevate_update_type(&update_type, UPDATE_TYPE_FULL);
 	}
 
 	if (resource_pixel_format_to_bpp(u->plane_info->format) !=
-- 
2.25.1