Writing to dcefclk causes the gpu to become unresponsive, and requires a reboot.
Patch prevents user from successfully writing to file pp_dpm_dcefclk on smu_vv11
parts and gives better user feedback that this operation is not allowed.
Signed-off-by: Darren Powell <darren.powell@xxxxxxx>
---
drivers/gpu/drm/amd/pm/amdgpu_pm.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/amd/pm/amdgpu_pm.c b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
index 204e34549013..317e9b47db53 100644
--- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
@@ -1891,6 +1891,19 @@ static int default_attr_update(struct amdgpu_device *adev, struct amdgpu_device_
}
}
+ if (DEVICE_ATTR_IS(pp_dpm_dcefclk)) {
+ /* SMU MP1 does not support dcefclk level setting */
+ if (asic_type == CHIP_NAVI10 ||
+ asic_type == CHIP_NAVI14 ||
+ asic_type == CHIP_NAVI12 ||
+ asic_type == CHIP_SIENNA_CICHLID ||
+ asic_type == CHIP_NAVY_FLOUNDER ||
+ asic_type == CHIP_DIMGREY_CAVEFISH ) {
+ dev_attr->attr.mode &= ~S_IWUGO;
+ dev_attr->store = NULL;
+ }
+ }
+
#undef DEVICE_ATTR_IS
return 0;
--
2.25.1
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