1 files changed, 36 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3489-drm-amd-display-BL-setting-save-restore.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3489-drm-amd-display-BL-setting-save-restore.patch
new file mode 100644
index 00000000..5260c2fb
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3489-drm-amd-display-BL-setting-save-restore.patch
@@ -0,0 +1,36 @@
+From 8b7561b1dbfd23df8433b2921274c52eea8c1c76 Mon Sep 17 00:00:00 2001
+From: Charlene Liu <charlene.liu@amd.com>
+Date: Mon, 15 Jan 2018 23:22:51 -0500
+Subject: [PATCH 3489/4131] drm/amd/display: BL setting save/restore
+
+Signed-off-by: Charlene Liu <charlene.liu@amd.com>
+Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
+Acked-by: Harry Wentland <harry.wentland@amd.com>
+Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
+---
+ drivers/gpu/drm/amd/display/dc/dce/dce_abm.c | 9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c b/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c
+index b48190f..b231bd5 100644
+--- a/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c
++++ b/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c
+@@ -323,6 +323,15 @@ static bool dce_abm_immediate_disable(struct abm *abm)
+ 	/* notifyDMCUMsg */
+ 	REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
+ 
++	abm->stored_backlight_registers.BL_PWM_CNTL =
++		REG_READ(BL_PWM_CNTL);
++	abm->stored_backlight_registers.BL_PWM_CNTL2 =
++		REG_READ(BL_PWM_CNTL2);
++	abm->stored_backlight_registers.BL_PWM_PERIOD_CNTL =
++		REG_READ(BL_PWM_PERIOD_CNTL);
++
++	REG_GET(LVTMA_PWRSEQ_REF_DIV, BL_PWM_REF_DIV,
++		&abm->stored_backlight_registers.LVTMA_PWRSEQ_REF_DIV_BL_PWM_REF_DIV);
+ 	return true;
+ }
+ 
+-- 
+2.7.4
+