| From 1bced75f4ab04bec55aecb57d99435dc6d0ae5a0 Mon Sep 17 00:00:00 2001 |
| From: Rex Zhu <Rex.Zhu@amd.com> |
| Date: Tue, 27 Feb 2018 18:20:53 +0800 |
| Subject: drm/amdgpu: Notify sbios device ready before send request |
| |
| From: Rex Zhu <Rex.Zhu@amd.com> |
| |
| commit 1bced75f4ab04bec55aecb57d99435dc6d0ae5a0 upstream. |
| |
| 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 |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c | 3 +++ |
| 1 file changed, 3 insertions(+) |
| |
| --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c |
| +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c |
| @@ -540,6 +540,9 @@ int amdgpu_acpi_pcie_performance_request |
| 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) |
