drm/radeon: split busmaster enable out to a separate function

this is just a code cleanup from the kms tree.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 20 insertions, 15 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_cp.c b/drivers/gpu/drm/radeon/radeon_cp.c
index 78a058fc039f..8338353e505b 100644
--- a/drivers/gpu/drm/radeon/radeon_cp.c
+++ b/drivers/gpu/drm/radeon/radeon_cp.c
@@ -191,6 +191,25 @@ static void radeon_write_agp_base(drm_radeon_private_t *dev_priv, u64 agp_base)
         }
 }
 
+static void radeon_enable_bm(struct drm_radeon_private *dev_priv)
+{
+        u32 tmp;
+        /* Turn on bus mastering */
+        if (((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_RS690) ||
+            ((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_RS740)) {
+                /* rs600/rs690/rs740 */
+                tmp = RADEON_READ(RADEON_BUS_CNTL) & ~RS600_BUS_MASTER_DIS;
+                RADEON_WRITE(RADEON_BUS_CNTL, tmp);
+        } else if (((dev_priv->flags & RADEON_FAMILY_MASK) <= CHIP_RV350) ||
+                   ((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_R420) ||
+                   ((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_RS400) ||
+                   ((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_RS480)) {
+                /* r1xx, r2xx, r300, r(v)350, r420/r481, rs400/rs480 */
+                tmp = RADEON_READ(RADEON_BUS_CNTL) & ~RADEON_BUS_MASTER_DIS;
+                RADEON_WRITE(RADEON_BUS_CNTL, tmp);
+        } /* PCIE cards appears to not need this */
+}
+
 static int RADEON_READ_PLL(struct drm_device * dev, int addr)
 {
         drm_radeon_private_t *dev_priv = dev->dev_private;
@@ -608,7 +627,6 @@ static void radeon_cp_init_ring_buffer(struct drm_device * dev,
 {
         struct drm_radeon_master_private *master_priv;
         u32 ring_start, cur_read_ptr;
-        u32 tmp;
 
         /* Initialize the memory controller. With new memory map, the fb location
          * is not changed, it should have been properly initialized already. Part
@@ -690,20 +708,7 @@ static void radeon_cp_init_ring_buffer(struct drm_device * dev,
 
         RADEON_WRITE(RADEON_SCRATCH_UMSK, 0x7);
 
-        /* Turn on bus mastering */
-        if (((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_RS690) ||
-            ((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_RS740)) {
-                /* rs600/rs690/rs740 */
-                tmp = RADEON_READ(RADEON_BUS_CNTL) & ~RS600_BUS_MASTER_DIS;
-                RADEON_WRITE(RADEON_BUS_CNTL, tmp);
-        } else if (((dev_priv->flags & RADEON_FAMILY_MASK) <= CHIP_RV350) ||
-                   ((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_R420) ||
-                   ((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_RS400) ||
-                   ((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_RS480)) {
-                /* r1xx, r2xx, r300, r(v)350, r420/r481, rs400/rs480 */
-                tmp = RADEON_READ(RADEON_BUS_CNTL) & ~RADEON_BUS_MASTER_DIS;
-                RADEON_WRITE(RADEON_BUS_CNTL, tmp);
-        } /* PCIE cards appears to not need this */
+        radeon_enable_bm(dev_priv);
 
         radeon_write_ring_rptr(dev_priv, RADEON_SCRATCHOFF(0), 0);
         RADEON_WRITE(RADEON_LAST_FRAME_REG, 0);