diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.19.8/1202-drm-amd-display-Add-monitor-patch-for-backlight.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.19.8/1202-drm-amd-display-Add-monitor-patch-for-backlight.patch | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.19.8/1202-drm-amd-display-Add-monitor-patch-for-backlight.patch b/common/recipes-kernel/linux/linux-yocto-4.19.8/1202-drm-amd-display-Add-monitor-patch-for-backlight.patch new file mode 100644 index 00000000..6721f086 --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.19.8/1202-drm-amd-display-Add-monitor-patch-for-backlight.patch @@ -0,0 +1,53 @@ +From bc1dbae20a4b3d122fc94fb14a2d0e316f677d03 Mon Sep 17 00:00:00 2001 +From: Xiaodong Yan <Xiaodong.Yan@amd.com> +Date: Thu, 17 Jan 2019 00:18:01 +0800 +Subject: [PATCH 1202/2940] drm/amd/display: Add monitor patch for backlight + +off + +[Why] +Different panel need different time from backlight disable to end of valid video data, +if the time is too short, panel will flash when dpms off + +[How] +Add monitor patch to control the time from backlight disable to end of valid video data, + +Change-Id: Iac651aa22197bce98b1c7c8537333891b87d474e +Signed-off-by: Xiaodong Yan <Xiaodong.Yan@amd.com> +Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com> +Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> +--- + drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c | 4 ++++ + drivers/gpu/drm/amd/display/dc/dc_types.h | 1 + + 2 files changed, 5 insertions(+) + +diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c +index 16d441d3af8a..f7f7515f65f4 100644 +--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c ++++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c +@@ -119,6 +119,10 @@ bool edp_receiver_ready_T9(struct dc_link *link) + break; + udelay(100); //MAx T9 + } while (++tries < 50); ++ ++ if (link->local_sink->edid_caps.panel_patch.extra_delay_backlight_off > 0) ++ udelay(link->local_sink->edid_caps.panel_patch.extra_delay_backlight_off * 1000); ++ + return result; + } + bool edp_receiver_ready_T7(struct dc_link *link) +diff --git a/drivers/gpu/drm/amd/display/dc/dc_types.h b/drivers/gpu/drm/amd/display/dc/dc_types.h +index 56e7f3dab15a..da2009a108cf 100644 +--- a/drivers/gpu/drm/amd/display/dc/dc_types.h ++++ b/drivers/gpu/drm/amd/display/dc/dc_types.h +@@ -201,6 +201,7 @@ union display_content_support { + struct dc_panel_patch { + unsigned int dppowerup_delay; + unsigned int extra_t12_ms; ++ unsigned int extra_delay_backlight_off; + }; + + struct dc_edid_caps { +-- +2.17.1 + |