drm/nv50/pm: only touch 0x611200 on nv92-

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/gpu/drm/nouveau/nv50_pm.c b/drivers/gpu/drm/nouveau/nv50_pm.c
index 961d8f20d27f..e7ff5acce65f 100644
--- a/drivers/gpu/drm/nouveau/nv50_pm.c
+++ b/drivers/gpu/drm/nouveau/nv50_pm.c
@@ -594,8 +594,10 @@ nv50_pm_clocks_set(struct drm_device *dev, void *data)
         }
 
         /* disable display */
-        nv_wr32(dev, 0x611200, 0x00003300);
-        udelay(100);
+        if (dev_priv->chipset >= 0x92) {
+                nv_wr32(dev, 0x611200, 0x00003300);
+                udelay(100);
+        }
 
         /* prepare ram for reclocking */
         nv_wr32(dev, 0x1002d4, 0x00000001); /* precharge */
@@ -617,7 +619,8 @@ nv50_pm_clocks_set(struct drm_device *dev, void *data)
         udelay(100);
 
         /* re-enable display */
-        nv_wr32(dev, 0x611200, 0x00003330);
+        if (dev_priv->chipset >= 0x92)
+                nv_wr32(dev, 0x611200, 0x00003330);
 
         goto resume;
 error: