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drm/amdgpu: Notify sbios device ready before send request 

it is required if a platform supports PCIe root complex
core voltage reduction. After receiving this notification,
SBIOS can apply default PCIe root complex power policy.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Rex Zhu 2018-02-27 18:20:53 +08:00 committed by Alex Deucher
parent 545b0bcde7
commit 1bced75f4a
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
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@ -540,6 +540,9 @@ int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev,
size_t size;
u32 retry = 3;
if (amdgpu_acpi_pcie_notify_device_ready(adev))
return -EINVAL;
/* Get the device handle */
handle = ACPI_HANDLE(&adev->pdev->dev);
if (!handle)