drm/i915/overlay: Tidy update_pfit_vscale_ratio()

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_overlay.c b/drivers/gpu/drm/i915/intel_overlay.c
index cc86b3e..4840582 100644 (file)
--- a/drivers/gpu/drm/i915/intel_overlay.c
+++ b/drivers/gpu/drm/i915/intel_overlay.c
@@ -937,19 +937,20 @@ static void update_pfit_vscale_ratio(struct intel_overlay *overlay)
 {
        struct drm_device *dev = overlay->dev;
        drm_i915_private_t *dev_priv = dev->dev_private;
-       u32 ratio;
        u32 pfit_control = I915_READ(PFIT_CONTROL);
+       u32 ratio;
 
        /* XXX: This is not the same logic as in the xorg driver, but more in
-        * line with the intel documentation for the i965 */
-       if (!IS_I965G(dev) && (pfit_control & VERT_AUTO_SCALE)) {
-               ratio = I915_READ(PFIT_AUTO_RATIOS) >> PFIT_VERT_SCALE_SHIFT;
-       } else { /* on i965 use the PGM reg to read out the autoscaler values */
-               ratio = I915_READ(PFIT_PGM_RATIOS);
-               if (IS_I965G(dev))
-                       ratio >>= PFIT_VERT_SCALE_SHIFT_965;
+        * line with the intel documentation for the i965
+        */
+       if (!IS_I965G(dev)) {
+               if (pfit_control & VERT_AUTO_SCALE)
+                       ratio = I915_READ(PFIT_AUTO_RATIOS);
                else
-                       ratio >>= PFIT_VERT_SCALE_SHIFT;
+                       ratio = I915_READ(PFIT_PGM_RATIOS);
+               ratio >>= PFIT_VERT_SCALE_SHIFT;
+       } else { /* on i965 use the PGM reg to read out the autoscaler values */
+               ratio = I915_READ(PFIT_PGM_RATIOS) >> PFIT_VERT_SCALE_SHIFT_965;
        }
 
        overlay->pfit_vscale_ratio = ratio;