drm/radeon/kms: bail on BTC parts if MC ucode is missing

[pandora-kernel.git] / drivers / gpu / drm / radeon / evergreen.c

diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 5e00d16..92c9628 100644 (file)
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -3276,6 +3276,18 @@ int evergreen_init(struct radeon_device *rdev)
                        rdev->accel_working = false;
                }
        }
+
+       /* Don't start up if the MC ucode is missing on BTC parts.
+        * The default clocks and voltages before the MC ucode
+        * is loaded are not suffient for advanced operations.
+        */
+       if (ASIC_IS_DCE5(rdev)) {
+               if (!rdev->mc_fw && !(rdev->flags & RADEON_IS_IGP)) {
+                       DRM_ERROR("radeon: MC ucode required for NI+.\n");
+                       return -EINVAL;
+               }
+       }
+
        return 0;
 }