drm/i915: Handle tiled buffers in vblank tasklet

The vblank tasklet update code must build 2D blt commands with the appropriate
tiled flags
Signed-off-by: NDave Airlie <airlied@redhat.com>

drivers/char/drm/i915_drv.h

@@ -566,6 +566,8 @@ extern int i915_wait_ring(struct drm_device * dev, int n, const char *caller);
 #define XY_SRC_COPY_BLT_CMD		((2<<29)|(0x53<<22)|6)
 #define XY_SRC_COPY_BLT_WRITE_ALPHA	(1<<21)
 #define XY_SRC_COPY_BLT_WRITE_RGB	(1<<20)
+#define XY_SRC_COPY_BLT_SRC_TILED	(1<<15)
+#define XY_SRC_COPY_BLT_DST_TILED	(1<<11)
 
 #define MI_BATCH_BUFFER		((0x30<<23)|1)
 #define MI_BATCH_BUFFER_START	(0x31<<23)

drivers/char/drm/i915_irq.c

@@ -57,10 +57,20 @@ static void i915_vblank_tasklet(struct drm_device *dev)
 				XY_SRC_COPY_BLT_WRITE_ALPHA |
 				XY_SRC_COPY_BLT_WRITE_RGB)
 			     : XY_SRC_COPY_BLT_CMD;
-	u32 pitchropcpp = (sarea_priv->pitch * cpp) | (0xcc << 16) |
-			  (cpp << 23) | (1 << 24);
+	u32 src_pitch = sarea_priv->pitch * cpp;
+	u32 dst_pitch = sarea_priv->pitch * cpp;
+	u32 ropcpp = (0xcc << 16) | ((cpp - 1) << 24);
 	RING_LOCALS;
 
+	if (sarea_priv->front_tiled) {
+		cmd |= XY_SRC_COPY_BLT_DST_TILED;
+		dst_pitch >>= 2;
+	}
+	if (sarea_priv->back_tiled) {
+		cmd |= XY_SRC_COPY_BLT_SRC_TILED;
+		src_pitch >>= 2;
+	}
+
 	DRM_DEBUG("\n");
 
 	INIT_LIST_HEAD(&hits);
@@ -194,12 +204,12 @@ static void i915_vblank_tasklet(struct drm_device *dev)
 				BEGIN_LP_RING(8);
 
 				OUT_RING(cmd);
-				OUT_RING(pitchropcpp);
+				OUT_RING(ropcpp | dst_pitch);
 				OUT_RING((y1 << 16) | rect->x1);
 				OUT_RING((y2 << 16) | rect->x2);
 				OUT_RING(sarea_priv->front_offset);
 				OUT_RING((y1 << 16) | rect->x1);
-				OUT_RING(pitchropcpp & 0xffff);
+				OUT_RING(src_pitch);
 				OUT_RING(sarea_priv->back_offset);
 
 				ADVANCE_LP_RING();