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drm/amdgpu: use pcie_bandwidth_available rather than open coding it

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It does the same thing we were doing already.  I though it needed
work for gen3/4 speeds, but that seems to be covered already.

Reviewed-by: Evan Quan <evan.quan@amd.com>
Acked-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2019-04-11 08:58:22 -05:00
parent 5208e6a3b2
commit dbaa922b57
1 changed files with 2 additions and 39 deletions
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41
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@ -3707,43 +3707,6 @@ int amdgpu_device_gpu_recover(struct amdgpu_device *adev,
return r;
}
static void amdgpu_device_get_min_pci_speed_width(struct amdgpu_device *adev,
enum pci_bus_speed *speed,
enum pcie_link_width *width)
{
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;
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)
*speed = cur_speed;
else if (cur_speed < *speed)
*speed = cur_speed;
}
if (cur_width != PCIE_LNK_WIDTH_UNKNOWN) {
if (*width == PCIE_LNK_WIDTH_UNKNOWN)
*width = cur_width;
else if (cur_width < *width)
*width = cur_width;
}
pdev = pci_upstream_bridge(pdev);
}
}
/**
* amdgpu_device_get_pcie_info - fence pcie info about the PCIE slot
*
@ -3777,8 +3740,8 @@ static void amdgpu_device_get_pcie_info(struct amdgpu_device *adev)
if (adev->pm.pcie_gen_mask && adev->pm.pcie_mlw_mask)
return;
amdgpu_device_get_min_pci_speed_width(adev, &platform_speed_cap,
&platform_link_width);
pcie_bandwidth_available(adev->pdev, NULL,
&platform_speed_cap, &platform_link_width);
if (adev->pm.pcie_gen_mask == 0) {
/* asic caps */