1 files changed, 43 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.14.71/0068-drm-amd-display-Add-debug-option-to-disable-dmcu.patch b/common/recipes-kernel/linux/linux-yocto-4.14.71/0068-drm-amd-display-Add-debug-option-to-disable-dmcu.patch
new file mode 100644
index 00000000..a855b551
--- /dev/null
+++ b/common/recipes-kernel/linux/linux-yocto-4.14.71/0068-drm-amd-display-Add-debug-option-to-disable-dmcu.patch
@@ -0,0 +1,43 @@
+From 0020aa18b2240e9649553c774ac99873b13d25f5 Mon Sep 17 00:00:00 2001
+From: Yongqiang Sun <yongqiang.sun@amd.com>
+Date: Thu, 15 Dec 2016 10:50:48 -0500
+Subject: [PATCH 0068/4131] drm/amd/display: Add debug option to disable dmcu
+
+Signed-off-by: Yongqiang Sun <yongqiang.sun@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/dc.h                   | 1 +
+ drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c | 3 +++
+ 2 files changed, 4 insertions(+)
+
+diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
+index 4cb1948..c7905b3 100644
+--- a/drivers/gpu/drm/amd/display/dc/dc.h
++++ b/drivers/gpu/drm/amd/display/dc/dc.h
+@@ -147,6 +147,7 @@ struct dc_debug {
+ 	bool disable_dfs_bypass;
+ 	bool disable_power_gate;
+ 	bool disable_clock_gate;
++	bool disable_dmcu;
+ };
+ 
+ struct dc {
+diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c b/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
+index c73d605..a8a2290 100644
+--- a/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
++++ b/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
+@@ -1821,6 +1821,9 @@ void dce110_link_encoder_init_dmcu_backlight_settings(
+ 	uint32_t s2;
+ 	uint32_t value;
+ 
++	if (enc->ctx->dc->debug.disable_dmcu)
++		return;
++
+ 	bl_pwm_cntl = REG_READ(BL_PWM_CNTL);
+ 
+ 	/* It must not be 0, so we have to restore them
+-- 
+2.7.4
+