1 files changed, 47 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/files/0815-drm-amd-dal-Ungate-Underlay-pipe-clock.patch b/common/recipes-kernel/linux/files/0815-drm-amd-dal-Ungate-Underlay-pipe-clock.patch
new file mode 100644
index 00000000..e5b77433
--- /dev/null
+++ b/common/recipes-kernel/linux/files/0815-drm-amd-dal-Ungate-Underlay-pipe-clock.patch
@@ -0,0 +1,47 @@
+From 738f0b087301175de753eb1a10825b50c191749a Mon Sep 17 00:00:00 2001
+From: David Rokhvarg <David.Rokhvarg@amd.com>
+Date: Thu, 18 Feb 2016 17:03:07 -0500
+Subject: [PATCH 0815/1110] drm/amd/dal: Ungate Underlay pipe clock.
+
+Signed-off-by: David Rokhvarg <David.Rokhvarg@amd.com>
+Acked-by: Harry Wentland <harry.wentland@amd.com>
+---
+ .../drm/amd/dal/dc/gpu/dce110/dc_clock_gating_dce110.c   | 16 ++++++++++++++++
+ 1 file changed, 16 insertions(+)
+
+diff --git a/drivers/gpu/drm/amd/dal/dc/gpu/dce110/dc_clock_gating_dce110.c b/drivers/gpu/drm/amd/dal/dc/gpu/dce110/dc_clock_gating_dce110.c
+index 4c307f6..a54cc25 100644
+--- a/drivers/gpu/drm/amd/dal/dc/gpu/dce110/dc_clock_gating_dce110.c
++++ b/drivers/gpu/drm/amd/dal/dc/gpu/dce110/dc_clock_gating_dce110.c
+@@ -62,6 +62,21 @@ static void force_hw_base_light_sleep(struct dc_context *ctx)
+ 
+ }
+ 
++static void underlay_clock_enable(struct dc_context *ctx)
++{
++	uint32_t value = 0;
++
++	value = dm_read_reg(ctx, mmDCFEV_CLOCK_CONTROL);
++
++	set_reg_field_value(
++			value,
++			1,
++			DCFEV_CLOCK_CONTROL,
++			DCFEV_CLOCK_ENABLE);
++
++	dm_write_reg(ctx, mmDCFEV_CLOCK_CONTROL, value);
++}
++
+ static void enable_hw_base_light_sleep(struct dc_context *ctx)
+ {
+ 	NOT_IMPLEMENTED();
+@@ -86,5 +101,6 @@ void dal_dc_clock_gating_dce110_power_up(
+ 		disable_sw_manual_control_light_sleep(ctx);
+ 	} else {
+ 		force_hw_base_light_sleep(ctx);
++		underlay_clock_enable(ctx);
+ 	}
+ }
+-- 
+2.7.4
+