Revert "drm/amdgpu: simplify ATPX detection"

This reverts commit f5fda6d89afe6e9cedaa1c3303903c905262f6e8.

You can't use BASE_CLASS in pci_get_class.

Bug: https://gitlab.freedesktop.org/drm/amd/issues/995
Acked-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c
index a97fb75..3e35a8f 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c
@@ -613,7 +613,17 @@ static bool amdgpu_atpx_detect(void)
        bool d3_supported = false;
        struct pci_dev *parent_pdev;
 
-       while ((pdev = pci_get_class(PCI_BASE_CLASS_DISPLAY << 16, pdev)) != NULL) {
+       while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
+               vga_count++;
+
+               has_atpx |= (amdgpu_atpx_pci_probe_handle(pdev) == true);
+
+               parent_pdev = pci_upstream_bridge(pdev);
+               d3_supported |= parent_pdev && parent_pdev->bridge_d3;
+               amdgpu_atpx_get_quirks(pdev);
+       }
+
+       while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
                vga_count++;
 
                has_atpx |= (amdgpu_atpx_pci_probe_handle(pdev) == true);