drm/radeon/kms/pm: fix power state indexing on igp chips in dynpm mode
authorAlex Deucher <alexdeucher@gmail.com>
Fri, 25 Jun 2010 20:21:27 +0000 (16:21 -0400)
committerDave Airlie <airlied@redhat.com>
Thu, 1 Jul 2010 01:59:46 +0000 (11:59 +1000)
Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=28745

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Tested-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
drivers/gpu/drm/radeon/r600.c

index 90f28175a7bc44f0180947b1ea00ebea5bc6b765..3d6645ce21518a640dd0981e38a67e223e86a49e 100644 (file)
@@ -130,9 +130,14 @@ void r600_pm_get_dynpm_state(struct radeon_device *rdev)
                                                        break;
                                                }
                                        }
-                               } else
-                                       rdev->pm.requested_power_state_index =
-                                               rdev->pm.current_power_state_index - 1;
+                               } else {
+                                       if (rdev->pm.current_power_state_index == 0)
+                                               rdev->pm.requested_power_state_index =
+                                                       rdev->pm.num_power_states - 1;
+                                       else
+                                               rdev->pm.requested_power_state_index =
+                                                       rdev->pm.current_power_state_index - 1;
+                               }
                        }
                        rdev->pm.requested_clock_mode_index = 0;
                        /* don't use the power state if crtcs are active and no display flag is set */