1 files changed, 39 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.14.71/5043-drm-amd-display-Read-back-max-backlight-value-at-boo.patch b/common/recipes-kernel/linux/linux-yocto-4.14.71/5043-drm-amd-display-Read-back-max-backlight-value-at-boo.patch
new file mode 100644
index 00000000..1296b959
--- /dev/null
+++ b/common/recipes-kernel/linux/linux-yocto-4.14.71/5043-drm-amd-display-Read-back-max-backlight-value-at-boo.patch
@@ -0,0 +1,39 @@
+From 064e819e738f9f9fd1487d5e6d319f36fa1c27f5 Mon Sep 17 00:00:00 2001
+From: David Francis <David.Francis@amd.com>
+Date: Wed, 18 Jul 2018 16:03:30 -0400
+Subject: [PATCH 5043/5725] drm/amd/display: Read back max backlight value at
+ boot
+
+[Why]
+If there is no program explicitly setting the backlight
+brightness (for example, during a minimal install of linux), the
+hardware defaults to maximum brightness but the backlight_device
+defaults to 0 value.  Thus, settings displays the wrong brightness
+value.
+
+[How]
+When creating the backlight device, set brightness to max
+
+Signed-off-by: David Francis <David.Francis@amd.com>
+Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
+Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
+Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
+---
+ drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+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 1c8088e..0d6475b 100644
+--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
++++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+@@ -1457,6 +1457,7 @@ amdgpu_dm_register_backlight_device(struct amdgpu_display_manager *dm)
+ 	struct backlight_properties props = { 0 };
+ 
+ 	props.max_brightness = AMDGPU_MAX_BL_LEVEL;
++	props.brightness = AMDGPU_MAX_BL_LEVEL;
+ 	props.type = BACKLIGHT_RAW;
+ 
+ 	snprintf(bl_name, sizeof(bl_name), "amdgpu_bl%d",
+-- 
+2.7.4
+