1 files changed, 34 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4166-drm-amd-powerplay-bug-fix-for-memory-clock-request-f.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4166-drm-amd-powerplay-bug-fix-for-memory-clock-request-f.patch
new file mode 100644
index 00000000..fe9f0230
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4166-drm-amd-powerplay-bug-fix-for-memory-clock-request-f.patch
@@ -0,0 +1,34 @@
+From fea8cac04d037e0669ac0ac5fa54c1222cff8769 Mon Sep 17 00:00:00 2001
+From: Kenneth Feng <kenneth.feng@amd.com>
+Date: Wed, 16 Oct 2019 16:20:38 +0800
+Subject: [PATCH 4166/4736] drm/amd/powerplay: bug fix for memory clock request
+ from display
+
+In some cases, display fixes memory clock frequency to a high value
+rather than the natural memory clock switching.
+When we comes back from s3 resume, the request from display is not reset,
+this causes the bug which makes the memory clock goes into a low value.
+Then due to the insuffcient memory clock, the screen flicks.
+
+Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
+Reviewed-by: Jack Xiao <Jack.Xiao@amd.com>
+---
+ drivers/gpu/drm/amd/powerplay/amdgpu_smu.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
+index d0a25dd8fcfc..fb5a55091292 100644
+--- a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
++++ b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
+@@ -1354,6 +1354,8 @@ static int smu_resume(void *handle)
+ 	if (smu->is_apu)
+ 		smu_set_gfx_cgpg(&adev->smu, true);
+ 
++	smu->disable_uclk_switch = 0;
++
+ 	mutex_unlock(&smu->mutex);
+ 
+ 	pr_info("SMU is resumed successfully!\n");
+-- 
+2.17.1
+