drm/radeon/kms: dynclks fixes

- only r4xx/r5xx/rs6xx/rs740 have clock gating atom table,
so disable it on r6xx.  it's already disabled on r7xx
- check to make sure the clock_gating hook exists before
calling it.  This avoids a segfault on asics without
that function.
- remove unused static power management function.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_clocks.c b/drivers/gpu/drm/radeon/radeon_clocks.c
index 73c4405bf42..3ec94a0d310 100644
--- a/drivers/gpu/drm/radeon/radeon_clocks.c
+++ b/drivers/gpu/drm/radeon/radeon_clocks.c
@@ -846,8 +846,10 @@ int radeon_static_clocks_init(struct drm_device *dev)
         /* XXX make sure engine is idle */
 
         if (radeon_dynclks != -1) {
-                if (radeon_dynclks)
-                        radeon_set_clock_gating(rdev, 1);
+                if (radeon_dynclks) {
+                        if (rdev->asic->set_clock_gating)
+                                radeon_set_clock_gating(rdev, 1);
+                }
         }
         radeon_apply_clock_quirks(rdev);
         return 0;