Commit 3d25802e authored Jul 01, 2008 by Jesse Barnes Committed by Linus Torvalds Jul 02, 2008

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>

parent 83680cdb

drivers/char/drm/i915_irq.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -62,11 +62,11 @@ static void i915_vblank_tasklet(struct drm_device *dev)
		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;
		}

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