drm/i915: Disable the surface tile swizzling on Sandybridge.

I can't explain this, except that it makes my display correct.

Signed-off-by: Eric Anholt <eric@anholt.net>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index ce28f18..3fe9073 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3419,7 +3419,7 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc,
 
        intel_wait_for_vblank(dev);
 
-       if (HAS_PCH_SPLIT(dev)) {
+       if (IS_IRONLAKE(dev)) {
                /* enable address swizzle for tiling buffer */
                temp = I915_READ(DISP_ARB_CTL);
                I915_WRITE(DISP_ARB_CTL, temp | DISP_TILE_SURFACE_SWIZZLING);