1 files changed, 38 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3909-drm-amd-powerplay-A-workaround-to-GPU-RESET-on-APU.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3909-drm-amd-powerplay-A-workaround-to-GPU-RESET-on-APU.patch
new file mode 100644
index 00000000..9f3882a2
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3909-drm-amd-powerplay-A-workaround-to-GPU-RESET-on-APU.patch
@@ -0,0 +1,38 @@
+From 40a7aa9c083a0259bd1fc9e2217932b89ab94187 Mon Sep 17 00:00:00 2001
+From: chen gong <curry.gong@amd.com>
+Date: Mon, 23 Sep 2019 15:02:56 +0800
+Subject: [PATCH 3909/4256] drm/amd/powerplay: A workaround to GPU RESET on APU
+
+Changes to function "smu_suspend" in amdgpu_smu.c is a workaround.
+
+We should get real information about if baco is enabled or not, while we
+always consider APU SMU feature as enabled in current code.
+
+I know APU do not support baco mode for GPU reset, so I use
+"adev->flags" to skip function "smu_feature_is_enabled".
+
+Signed-off-by: chen gong <curry.gong@amd.com>
+Reviewed-by: Aaron Liu <aaron.liu@amd.com>
+---
+ drivers/gpu/drm/amd/powerplay/amdgpu_smu.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
+index b3025bd0ea88..0237e4d06aca 100644
+--- a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
++++ b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
+@@ -1363,7 +1363,10 @@ static int smu_suspend(void *handle)
+ 	int ret;
+ 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+ 	struct smu_context *smu = &adev->smu;
+-	bool baco_feature_is_enabled = smu_feature_is_enabled(smu, SMU_FEATURE_BACO_BIT);
++	bool baco_feature_is_enabled = false;
++
++	if(!(adev->flags & AMD_IS_APU))
++		baco_feature_is_enabled = smu_feature_is_enabled(smu, SMU_FEATURE_BACO_BIT);
+ 
+ 	ret = smu_system_features_control(smu, false);
+ 	if (ret)
+-- 
+2.17.1
+