diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3748-drm-amdgpu-Remove-clock-gating-restore.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3748-drm-amdgpu-Remove-clock-gating-restore.patch | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3748-drm-amdgpu-Remove-clock-gating-restore.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3748-drm-amdgpu-Remove-clock-gating-restore.patch new file mode 100644 index 00000000..56ef8962 --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3748-drm-amdgpu-Remove-clock-gating-restore.patch @@ -0,0 +1,39 @@ +From e1bf1c707aeb54987d85d18ca03dfa7316d85e2a Mon Sep 17 00:00:00 2001 +From: Andrey Grodzovsky <andrey.grodzovsky@amd.com> +Date: Wed, 4 Sep 2019 11:16:24 -0400 +Subject: [PATCH 3748/4256] drm/amdgpu: Remove clock gating restore. + +Restoring clock gating break SMU opeartion afterwards, avoid +this until this further invistigated with SMU. + +Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com> +Reviewed-by: Tao Zhou <tao.zhou1@amd.com> +Reviewed-and-tested-by: Guchun Chen <guchun.chen@amd.com> +--- + drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c | 10 +++++++++- + 1 file changed, 9 insertions(+), 1 deletion(-) + +diff --git a/drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c b/drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c +index 7d0d4c57b315..aad83932dd05 100644 +--- a/drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c ++++ b/drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c +@@ -491,7 +491,15 @@ static void smu_v11_0_i2c_fini(struct i2c_adapter *control) + } + + /* Restore clock gating */ +- smu_v11_0_i2c_set_clock_gating(control, true); ++ ++ /* ++ * TODO Reenabling clock gating seems to break subsequent SMU operation ++ * on the I2C bus. My guess is that SMU doesn't disable clock gating like ++ * we do here before working with the bus. So for now just don't restore ++ * it but later work with SMU to see if they have this issue and can ++ * update their code appropriately ++ */ ++ /* smu_v11_0_i2c_set_clock_gating(control, true); */ + + } + +-- +2.17.1 + |