[PATCH] drm/amdgpu: fix incorrect pcie_gen_mask in passthrough case

[Tong Liu01]

[why]
Passthrough case is treated as root bus and pcie_gen_mask is set as
default value that does not support GEN 3 and GEN 4 for PCIe link
speed. So PCIe link speed will be downgraded at smu hw init in
passthrough condition

[how]
Move detect virtualization before get pcie info and check if it is
passthrough case when set pcie_gen_mask

Signed-off-by: Tong Liu01 <tong.li...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index a9d9bbe8586b..255b0014b6a3 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -3813,6 +3813,9 @@ int amdgpu_device_init(struct amdgpu_device *adev,
        DRM_INFO("register mmio base: 0x%08X\n", (uint32_t)adev->rmmio_base);
        DRM_INFO("register mmio size: %u\n", (unsigned)adev->rmmio_size);
 
+       /* detect hw virtualization here */
+       amdgpu_detect_virtualization(adev);
+
        amdgpu_device_get_pcie_info(adev);
 
        if (amdgpu_mcbp)
@@ -3827,9 +3830,6 @@ int amdgpu_device_init(struct amdgpu_device *adev,
        if (!adev->reset_domain)
                return -ENOMEM;
 
-       /* detect hw virtualization here */
-       amdgpu_detect_virtualization(adev);
-
        r = amdgpu_device_get_job_timeout_settings(adev);
        if (r) {
                dev_err(adev->dev, "invalid lockup_timeout parameter syntax\n");
@@ -5589,7 +5589,7 @@ static void amdgpu_device_get_pcie_info(struct 
amdgpu_device *adev)
                adev->pm.pcie_mlw_mask = amdgpu_pcie_lane_cap;
 
        /* covers APUs as well */
-       if (pci_is_root_bus(adev->pdev->bus)) {
+       if (pci_is_root_bus(adev->pdev->bus) && !amdgpu_passthrough(adev)) {
                if (adev->pm.pcie_gen_mask == 0)
                        adev->pm.pcie_gen_mask = AMDGPU_DEFAULT_PCIE_GEN_MASK;
                if (adev->pm.pcie_mlw_mask == 0)
-- 
2.34.1