drm/radeon: handle non-VGA class pci devices with ATRM

Newer PX systems have non-VGA pci class dGPUs.  Update
the ATRM fetch method to handle those cases.

bug:
https://bugzilla.kernel.org/show_bug.cgi?id=75401

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Cc: stable@vger.kernel.org

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_bios.c b/drivers/gpu/drm/radeon/radeon_bios.c
index b3633d9a5317..9ab30976287d 100644
--- a/drivers/gpu/drm/radeon/radeon_bios.c
+++ b/drivers/gpu/drm/radeon/radeon_bios.c
@@ -196,6 +196,20 @@ static bool radeon_atrm_get_bios(struct radeon_device *rdev)
                 }
         }
 
+        if (!found) {
+                while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
+                        dhandle = ACPI_HANDLE(&pdev->dev);
+                        if (!dhandle)
+                                continue;
+
+                        status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
+                        if (!ACPI_FAILURE(status)) {
+                                found = true;
+                                break;
+                        }
+                }
+        }
+
         if (!found)
                 return false;