From: Samson Tam <samson.tam@xxxxxxx>
[Why]
Adding support for chroma subsampling offset (cositing) in scaler
calculations to adjust reference point where we determine post-scaling
chroma value in YUV420 surfaces.
[How]
Add support for cositing options: NONE, LEFT and TOPLEFT Add debug
option force_cositing and set default to TOPLEFT to maintain same
behaviour as without offset support.
Reviewed-by: Jun Lei <jun.lei@xxxxxxx>
Acked-by: Rodrigo Siqueira <rodrigo.siqueira@xxxxxxx>
Signed-off-by: Samson Tam <samson.tam@xxxxxxx>
---
drivers/gpu/drm/amd/display/dc/dc.h | 3 +++
drivers/gpu/drm/amd/display/dc/dc_hw_types.h | 7 +++++++
2 files changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index 54534df73e83..188f2d401124 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -1003,6 +1003,7 @@ struct dc_debug_options {
unsigned int static_screen_wait_frames;
bool force_chroma_subsampling_1tap;
bool disable_422_left_edge_pixel;
+ unsigned int force_cositing;
};
struct gpu_info_soc_bounding_box_v1_0;
@@ -1285,6 +1286,7 @@ struct dc_plane_state {
struct tg_color visual_confirm_color;
bool is_statically_allocated;
+ enum chroma_cositing cositing;
};
struct dc_plane_info {
@@ -1303,6 +1305,7 @@ struct dc_plane_info {
int global_alpha_value;
bool input_csc_enabled;
int layer_index;
+ enum chroma_cositing cositing;
};
#include "dc_stream.h"
diff --git a/drivers/gpu/drm/amd/display/dc/dc_hw_types.h b/drivers/gpu/drm/amd/display/dc/dc_hw_types.h
index 465e15f57f93..2ad7f60805f5 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_hw_types.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_hw_types.h
@@ -738,6 +738,13 @@ enum scanning_type {
SCANNING_TYPE_UNDEFINED
};
+enum chroma_cositing {
+ CHROMA_COSITING_NONE,
+ CHROMA_COSITING_LEFT,
+ CHROMA_COSITING_TOPLEFT,
+ CHROMA_COSITING_COUNT
+};
+
struct dc_crtc_timing_flags {
uint32_t INTERLACE :1;
uint32_t HSYNC_POSITIVE_POLARITY :1; /* when set to 1,
--
2.43.0
