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drm/amd/amdgpu: fix PCIe dpm feature issue (v3) 

use pcie_bandwidth_available to get real link state
to update pcie table.

v2: fix incorrect initialized return value
v3: expand the fetching method about the link width to all asics.

Signed-off-by: Chengming Gui <Jack.Gui@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Chengming Gui 2019-03-21 13:26:28 +08:00 committed by Alex Deucher
parent 0ab925d369
commit ad51c46eec
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@ -3625,6 +3625,7 @@ static void amdgpu_device_get_min_pci_speed_width(struct amdgpu_device *adev,
struct pci_dev *pdev = adev->pdev;
enum pci_bus_speed cur_speed;
enum pcie_link_width cur_width;
u32 ret = 1;
*speed = PCI_SPEED_UNKNOWN;
*width = PCIE_LNK_WIDTH_UNKNOWN;
@ -3632,6 +3633,10 @@ static void amdgpu_device_get_min_pci_speed_width(struct amdgpu_device *adev,
while (pdev) {
cur_speed = pcie_get_speed_cap(pdev);
cur_width = pcie_get_width_cap(pdev);
ret = pcie_bandwidth_available(adev->pdev, NULL,
NULL, &cur_width);
if (!ret)
cur_width = PCIE_LNK_WIDTH_RESRV;
if (cur_speed != PCI_SPEED_UNKNOWN) {
if (*speed == PCI_SPEED_UNKNOWN)