drm/radeon: R300 AD only has one quad pipe.

Gleaned from the Mesa code.

Fixes https://bugs.freedesktop.org/show_bug.cgi?id=27355 .

Signed-off-by: Michel Dänzer <daenzer@vmware.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_cp.c b/drivers/gpu/drm/radeon/radeon_cp.c
index dc6eba6b96dd..419630dd2075 100644
--- a/drivers/gpu/drm/radeon/radeon_cp.c
+++ b/drivers/gpu/drm/radeon/radeon_cp.c
@@ -417,8 +417,9 @@ static int radeon_do_wait_for_idle(drm_radeon_private_t * dev_priv)
         return -EBUSY;
 }
 
-static void radeon_init_pipes(drm_radeon_private_t *dev_priv)
+static void radeon_init_pipes(struct drm_device *dev)
 {
+        drm_radeon_private_t *dev_priv = dev->dev_private;
         uint32_t gb_tile_config, gb_pipe_sel = 0;
 
         if ((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_RV530) {
@@ -436,11 +437,12 @@ static void radeon_init_pipes(drm_radeon_private_t *dev_priv)
                 dev_priv->num_gb_pipes = ((gb_pipe_sel >> 12) & 0x3) + 1;
         } else {
                 /* R3xx */
-                if (((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_R300) ||
+                if (((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_R300 &&
+                     dev->pdev->device != 0x4144) ||
                     ((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_R350)) {
                         dev_priv->num_gb_pipes = 2;
                 } else {
-                        /* R3Vxx */
+                        /* RV3xx/R300 AD */
                         dev_priv->num_gb_pipes = 1;
                 }
         }
@@ -736,7 +738,7 @@ static int radeon_do_engine_reset(struct drm_device * dev)
 
         /* setup the raster pipes */
         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R300)
-            radeon_init_pipes(dev_priv);
+            radeon_init_pipes(dev);
 
         /* Reset the CP ring */
         radeon_do_cp_reset(dev_priv);