3.2.60-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Alex Deucher <[email protected]>

commit d8ade3526b2aa0505132c404c05a38b73ea15490 upstream.

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 <[email protected]>
Signed-off-by: Christian König <[email protected]>
[bwh: Backported to 3.2: s/ACPI_HANDLE()/DEVICE_ACPI_HANDLE()/]
Signed-off-by: Ben Hutchings <[email protected]>
---
 drivers/gpu/drm/radeon/radeon_bios.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

--- a/drivers/gpu/drm/radeon/radeon_bios.c
+++ b/drivers/gpu/drm/radeon/radeon_bios.c
@@ -173,6 +173,20 @@ static bool radeon_atrm_get_bios(struct
                }
        }
 
+       if (!found) {
+               while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, 
pdev)) != NULL) {
+                       dhandle = DEVICE_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;
 

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