diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.14.71/4926-drm-amd-display-Add-YCbCr420-only-support-for-HDMI-4.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.14.71/4926-drm-amd-display-Add-YCbCr420-only-support-for-HDMI-4.patch | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.14.71/4926-drm-amd-display-Add-YCbCr420-only-support-for-HDMI-4.patch b/common/recipes-kernel/linux/linux-yocto-4.14.71/4926-drm-amd-display-Add-YCbCr420-only-support-for-HDMI-4.patch new file mode 100644 index 00000000..986e7a8c --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.14.71/4926-drm-amd-display-Add-YCbCr420-only-support-for-HDMI-4.patch @@ -0,0 +1,53 @@ +From 85217e9dc63056667627919b38a28b82b622601c Mon Sep 17 00:00:00 2001 +From: "Jerry (Fangzhi) Zuo" <Jerry.Zuo@amd.com> +Date: Fri, 22 Jun 2018 17:12:47 -0400 +Subject: [PATCH 4926/5725] drm/amd/display: Add YCbCr420 only support for HDMI + 4K@60 + +[Why] +Some monitors mark 4K@60 capable HDMI port only have 300MHz TMDS +maximum, but the edid includes 4K@60 mode in cea extension block. + +[How] +To enable 4K@60, need to limit BW by allowing YCbCr420 ONLY mode. +Add YCbCr420 only support for monitors that do not fully support +HDMI2.0, e.g., ASUS PA328. The YCbCr420 only support applies to +DCN, DCE112 or higher. + +Signed-off-by: Jerry (Fangzhi) Zuo <Jerry.Zuo@amd.com> +Reviewed-by: Charlene Liu <Charlene.Liu@amd.com> +Acked-by: Harry Wentland <harry.wentland@amd.com> +Signed-off-by: Alex Deucher <alexander.deucher@amd.com> +--- + drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 5 ++++- + 1 file changed, 4 insertions(+), 1 deletion(-) + +diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +index 1d7504a..d52d004 100644 +--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c ++++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +@@ -3829,7 +3829,6 @@ void amdgpu_dm_connector_init_helper(struct amdgpu_display_manager *dm, + aconnector->base.stereo_allowed = false; + aconnector->base.dpms = DRM_MODE_DPMS_OFF; + aconnector->hpd.hpd = AMDGPU_HPD_NONE; /* not used */ +- + mutex_init(&aconnector->hpd_lock); + + /* configure support HPD hot plug connector_>polled default value is 0 +@@ -3838,9 +3837,13 @@ void amdgpu_dm_connector_init_helper(struct amdgpu_display_manager *dm, + switch (connector_type) { + case DRM_MODE_CONNECTOR_HDMIA: + aconnector->base.polled = DRM_CONNECTOR_POLL_HPD; ++ aconnector->base.ycbcr_420_allowed = ++ link->link_enc->features.ycbcr420_supported ? true : false; + break; + case DRM_MODE_CONNECTOR_DisplayPort: + aconnector->base.polled = DRM_CONNECTOR_POLL_HPD; ++ aconnector->base.ycbcr_420_allowed = ++ link->link_enc->features.ycbcr420_supported ? true : false; + break; + case DRM_MODE_CONNECTOR_DVID: + aconnector->base.polled = DRM_CONNECTOR_POLL_HPD; +-- +2.7.4 + |