Commit d7b4a607 authored by Darren Powell's avatar Darren Powell Committed by Alex Deucher
Browse files

amdgpu/pm: set pp_dpm_dcefclk to readonly on NAVI10 and newer gpus 



v2 : change condition to apply to all chips after NAVI10

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 parts
NAVI10 and newer, and gives better user feedback that this operation is not allowed.

Signed-off-by: default avatarDarren Powell <darren.powell@amd.com>
Reviewed-by: default avatarKenneth Feng <kenneth.feng@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent b117b396

drivers/gpu/drm/amd/pm/amdgpu_pm.c

+8 −0
Original line number Diff line number Diff line
@@ -1891,6 +1891,14 @@ 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) {

			dev_attr->attr.mode &= ~S_IWUGO;

			dev_attr->store = NULL;

		}

	}



#undef DEVICE_ATTR_IS



	return 0;