DRM/i915: only use tiled blits on 965+
When scheduled swaps occur, we need to blit between front & back
buffers. If the buffers are tiled, we need to set the appropriate
XY_SRC_COPY tile bit, but only on 965 chips, since it will cause
corruption on pre-965 (e.g. 945).
Bug reported by and fix tested by Tomas Janousek <tomi@nomi.cz>.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Acked-by: Dave Airlie <airlied@linux.ie>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/char/drm/i915_irq.c b/drivers/char/drm/i915_irq.c
index f7f16e7..df03611 100644
--- a/drivers/char/drm/i915_irq.c
+++ b/drivers/char/drm/i915_irq.c
@@ -62,11 +62,11 @@
u32 ropcpp = (0xcc << 16) | ((cpp - 1) << 24);
RING_LOCALS;
- if (sarea_priv->front_tiled) {
+ if (IS_I965G(dev) && sarea_priv->front_tiled) {
cmd |= XY_SRC_COPY_BLT_DST_TILED;
dst_pitch >>= 2;
}
- if (sarea_priv->back_tiled) {
+ if (IS_I965G(dev) && sarea_priv->back_tiled) {
cmd |= XY_SRC_COPY_BLT_SRC_TILED;
src_pitch >>= 2;
}