diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3708-drm-amd-display-Subsample-mode-suboptimal-for-YCbCr4.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3708-drm-amd-display-Subsample-mode-suboptimal-for-YCbCr4.patch | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3708-drm-amd-display-Subsample-mode-suboptimal-for-YCbCr4.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3708-drm-amd-display-Subsample-mode-suboptimal-for-YCbCr4.patch new file mode 100644 index 00000000..1b5bdacf --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3708-drm-amd-display-Subsample-mode-suboptimal-for-YCbCr4.patch @@ -0,0 +1,55 @@ +From c7e03d3cadf2186e6374cd690d271f4ad8b25ca3 Mon Sep 17 00:00:00 2001 +From: Krunoslav Kovac <Krunoslav.Kovac@amd.com> +Date: Fri, 9 Aug 2019 17:16:18 -0400 +Subject: [PATCH 3708/4256] drm/amd/display: Subsample mode suboptimal for + YCbCr4:2:2 + +[Why&How] +Driver defaults to 1-tap subsample mode for 4:2:2. +DCE11.2 added 3-tap. The policy is: +DCE8-DCE11 - change to 2-tap, it's better than 1-tap. +DCE11.2+ - use 3-tap + +Note that 4:2:0 was added in DCE11.2 and already uses 3-tap always. +Note 2 is that DCE not covered on Linux, only DCN+ + +Signed-off-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com> +Reviewed-by: Charlene Liu <Charlene.Liu@amd.com> +Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> +--- + drivers/gpu/drm/amd/display/dc/dcn10/dcn10_opp.c | 5 ++++- + drivers/gpu/drm/amd/display/dc/dcn10/dcn10_opp.h | 2 ++ + 2 files changed, 6 insertions(+), 1 deletion(-) + +diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_opp.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_opp.c +index 1168342c7190..7045c00edab9 100644 +--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_opp.c ++++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_opp.c +@@ -166,7 +166,10 @@ static void opp1_set_pixel_encoding( + REG_UPDATE(FMT_CONTROL, FMT_PIXEL_ENCODING, 0); + break; + case PIXEL_ENCODING_YCBCR422: +- REG_UPDATE(FMT_CONTROL, FMT_PIXEL_ENCODING, 1); ++ REG_UPDATE_3(FMT_CONTROL, ++ FMT_PIXEL_ENCODING, 1, ++ FMT_SUBSAMPLING_MODE, 2, ++ FMT_CBCR_BIT_REDUCTION_BYPASS, 0); + break; + case PIXEL_ENCODING_YCBCR420: + REG_UPDATE(FMT_CONTROL, FMT_PIXEL_ENCODING, 2); +diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_opp.h b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_opp.h +index 0f10adea000c..2c0ecfa5a643 100644 +--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_opp.h ++++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_opp.h +@@ -116,6 +116,8 @@ + type FMT_RAND_G_SEED; \ + type FMT_RAND_B_SEED; \ + type FMT_PIXEL_ENCODING; \ ++ type FMT_SUBSAMPLING_MODE; \ ++ type FMT_CBCR_BIT_REDUCTION_BYPASS; \ + type FMT_CLAMP_DATA_EN; \ + type FMT_CLAMP_COLOR_FORMAT; \ + type FMT_DYNAMIC_EXP_EN; \ +-- +2.17.1 + |