1 files changed, 152 insertions, 445 deletions

diff --git a/drivers/char/drm/i915_irq.c b/drivers/char/drm/i915_irq.c
index 023ce66ef3ab..f7f16e7a8bf3 100644
--- a/drivers/char/drm/i915_irq.c
+++ b/drivers/char/drm/i915_irq.c
@@ -38,109 +38,6 @@
 #define MAX_NOPID ((u32)~0)
 
 /**
- * i915_get_pipe - return the the pipe associated with a given plane
- * @dev: DRM device
- * @plane: plane to look for
- *
- * The Intel Mesa & 2D drivers call the vblank routines with a plane number
- * rather than a pipe number, since they may not always be equal.  This routine
- * maps the given @plane back to a pipe number.
- */
-static int
-i915_get_pipe(struct drm_device *dev, int plane)
-{
-	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
-	u32 dspcntr;
-
-	dspcntr = plane ? I915_READ(DSPBCNTR) : I915_READ(DSPACNTR);
-
-	return dspcntr & DISPPLANE_SEL_PIPE_MASK ? 1 : 0;
-}
-
-/**
- * i915_get_plane - return the the plane associated with a given pipe
- * @dev: DRM device
- * @pipe: pipe to look for
- *
- * The Intel Mesa & 2D drivers call the vblank routines with a plane number
- * rather than a plane number, since they may not always be equal.  This routine
- * maps the given @pipe back to a plane number.
- */
-static int
-i915_get_plane(struct drm_device *dev, int pipe)
-{
-	if (i915_get_pipe(dev, 0) == pipe)
-		return 0;
-	return 1;
-}
-
-/**
- * i915_pipe_enabled - check if a pipe is enabled
- * @dev: DRM device
- * @pipe: pipe to check
- *
- * Reading certain registers when the pipe is disabled can hang the chip.
- * Use this routine to make sure the PLL is running and the pipe is active
- * before reading such registers if unsure.
- */
-static int
-i915_pipe_enabled(struct drm_device *dev, int pipe)
-{
-	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
-	unsigned long pipeconf = pipe ? PIPEBCONF : PIPEACONF;
-
-	if (I915_READ(pipeconf) & PIPEACONF_ENABLE)
-		return 1;
-
-	return 0;
-}
-
-/**
- * Emit a synchronous flip.
- *
- * This function must be called with the drawable spinlock held.
- */
-static void
-i915_dispatch_vsync_flip(struct drm_device *dev, struct drm_drawable_info *drw,
-			 int plane)
-{
-	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
-	drm_i915_sarea_t *sarea_priv = dev_priv->sarea_priv;
-	u16 x1, y1, x2, y2;
-	int pf_planes = 1 << plane;
-
-	/* If the window is visible on the other plane, we have to flip on that
-	 * plane as well.
-	 */
-	if (plane == 1) {
-		x1 = sarea_priv->planeA_x;
-		y1 = sarea_priv->planeA_y;
-		x2 = x1 + sarea_priv->planeA_w;
-		y2 = y1 + sarea_priv->planeA_h;
-	} else {
-		x1 = sarea_priv->planeB_x;
-		y1 = sarea_priv->planeB_y;
-		x2 = x1 + sarea_priv->planeB_w;
-		y2 = y1 + sarea_priv->planeB_h;
-	}
-
-	if (x2 > 0 && y2 > 0) {
-		int i, num_rects = drw->num_rects;
-		struct drm_clip_rect *rect = drw->rects;
-
-		for (i = 0; i < num_rects; i++)
-			if (!(rect[i].x1 >= x2 || rect[i].y1 >= y2 ||
-			      rect[i].x2 <= x1 || rect[i].y2 <= y1)) {
-				pf_planes = 0x3;
-
-				break;
-			}
-	}
-
-	i915_dispatch_flip(dev, pf_planes, 1);
-}
-
-/**
  * Emit blits for scheduled buffer swaps.
  *
  * This function will be called with the HW lock held.
@@ -148,19 +45,20 @@ i915_dispatch_vsync_flip(struct drm_device *dev, struct drm_drawable_info *drw,
 static void i915_vblank_tasklet(struct drm_device *dev)
 {
 	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+	unsigned long irqflags;
 	struct list_head *list, *tmp, hits, *hit;
-	int nhits, nrects, slice[2], upper[2], lower[2], i, num_pages;
-	unsigned counter[2];
+	int nhits, nrects, slice[2], upper[2], lower[2], i;
+	unsigned counter[2] = { atomic_read(&dev->vbl_received),
+				atomic_read(&dev->vbl_received2) };
 	struct drm_drawable_info *drw;
 	drm_i915_sarea_t *sarea_priv = dev_priv->sarea_priv;
-	u32 cpp = dev_priv->cpp,  offsets[3];
+	u32 cpp = dev_priv->cpp;
 	u32 cmd = (cpp == 4) ? (XY_SRC_COPY_BLT_CMD |
 				XY_SRC_COPY_BLT_WRITE_ALPHA |
 				XY_SRC_COPY_BLT_WRITE_RGB)
 			     : XY_SRC_COPY_BLT_CMD;
 	u32 src_pitch = sarea_priv->pitch * cpp;
 	u32 dst_pitch = sarea_priv->pitch * cpp;
-	/* COPY rop (0xcc), map cpp to magic color depth constants */
 	u32 ropcpp = (0xcc << 16) | ((cpp - 1) << 24);
 	RING_LOCALS;
 
@@ -173,34 +71,24 @@ static void i915_vblank_tasklet(struct drm_device *dev)
 		src_pitch >>= 2;
 	}
 
-	counter[0] = drm_vblank_count(dev, 0);
-	counter[1] = drm_vblank_count(dev, 1);
-
 	DRM_DEBUG("\n");
 
 	INIT_LIST_HEAD(&hits);
 
 	nhits = nrects = 0;
 
-	/* No irqsave/restore necessary.  This tasklet may be run in an
-	 * interrupt context or normal context, but we don't have to worry
-	 * about getting interrupted by something acquiring the lock, because
-	 * we are the interrupt context thing that acquires the lock.
-	 */
-	spin_lock(&dev_priv->swaps_lock);
+	spin_lock_irqsave(&dev_priv->swaps_lock, irqflags);
 
 	/* Find buffer swaps scheduled for this vertical blank */
 	list_for_each_safe(list, tmp, &dev_priv->vbl_swaps.head) {
 		drm_i915_vbl_swap_t *vbl_swap =
 			list_entry(list, drm_i915_vbl_swap_t, head);
-		int pipe = i915_get_pipe(dev, vbl_swap->plane);
 
-		if ((counter[pipe] - vbl_swap->sequence) > (1<<23))
+		if ((counter[vbl_swap->pipe] - vbl_swap->sequence) > (1<<23))
 			continue;
 
 		list_del(list);
 		dev_priv->swaps_pending--;
-		drm_vblank_put(dev, pipe);
 
 		spin_unlock(&dev_priv->swaps_lock);
 		spin_lock(&dev->drw_lock);
@@ -238,23 +126,43 @@ static void i915_vblank_tasklet(struct drm_device *dev)
 		spin_lock(&dev_priv->swaps_lock);
 	}
 
-	spin_unlock(&dev_priv->swaps_lock);
-
-	if (nhits == 0)
+	if (nhits == 0) {
+		spin_unlock_irqrestore(&dev_priv->swaps_lock, irqflags);
 		return;
+	}
+
+	spin_unlock(&dev_priv->swaps_lock);
 
 	i915_kernel_lost_context(dev);
 
-	upper[0] = upper[1] = 0;
-	slice[0] = max(sarea_priv->planeA_h / nhits, 1);
-	slice[1] = max(sarea_priv->planeB_h / nhits, 1);
-	lower[0] = sarea_priv->planeA_y + slice[0];
-	lower[1] = sarea_priv->planeB_y + slice[0];
+	if (IS_I965G(dev)) {
+		BEGIN_LP_RING(4);
+
+		OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
+		OUT_RING(0);
+		OUT_RING(((sarea_priv->width - 1) & 0xffff) | ((sarea_priv->height - 1) << 16));
+		OUT_RING(0);
+		ADVANCE_LP_RING();
+	} else {
+		BEGIN_LP_RING(6);
 
-	offsets[0] = sarea_priv->front_offset;
-	offsets[1] = sarea_priv->back_offset;
-	offsets[2] = sarea_priv->third_offset;
-	num_pages = sarea_priv->third_handle ? 3 : 2;
+		OUT_RING(GFX_OP_DRAWRECT_INFO);
+		OUT_RING(0);
+		OUT_RING(0);
+		OUT_RING(sarea_priv->width | sarea_priv->height << 16);
+		OUT_RING(sarea_priv->width | sarea_priv->height << 16);
+		OUT_RING(0);
+
+		ADVANCE_LP_RING();
+	}
+
+	sarea_priv->ctxOwner = DRM_KERNEL_CONTEXT;
+
+	upper[0] = upper[1] = 0;
+	slice[0] = max(sarea_priv->pipeA_h / nhits, 1);
+	slice[1] = max(sarea_priv->pipeB_h / nhits, 1);
+	lower[0] = sarea_priv->pipeA_y + slice[0];
+	lower[1] = sarea_priv->pipeB_y + slice[0];
 
 	spin_lock(&dev->drw_lock);
 
@@ -266,8 +174,6 @@ static void i915_vblank_tasklet(struct drm_device *dev)
 	for (i = 0; i++ < nhits;
 	     upper[0] = lower[0], lower[0] += slice[0],
 	     upper[1] = lower[1], lower[1] += slice[1]) {
-		int init_drawrect = 1;
-
 		if (i == nhits)
 			lower[0] = lower[1] = sarea_priv->height;
 
@@ -275,7 +181,7 @@ static void i915_vblank_tasklet(struct drm_device *dev)
 			drm_i915_vbl_swap_t *swap_hit =
 				list_entry(hit, drm_i915_vbl_swap_t, head);
 			struct drm_clip_rect *rect;
-			int num_rects, plane, front, back;
+			int num_rects, pipe;
 			unsigned short top, bottom;
 
 			drw = drm_get_drawable_info(dev, swap_hit->drw_id);
@@ -283,50 +189,10 @@ static void i915_vblank_tasklet(struct drm_device *dev)
 			if (!drw)
 				continue;
 
-			plane = swap_hit->plane;
-
-			if (swap_hit->flip) {
-				i915_dispatch_vsync_flip(dev, drw, plane);
-				continue;
-			}
-
-			if (init_drawrect) {
-				int width  = sarea_priv->width;
-				int height = sarea_priv->height;
-				if (IS_I965G(dev)) {
-					BEGIN_LP_RING(4);
-
-					OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
-					OUT_RING(0);
-					OUT_RING(((width - 1) & 0xffff) | ((height - 1) << 16));
-					OUT_RING(0);
-
-					ADVANCE_LP_RING();
-				} else {
-					BEGIN_LP_RING(6);
-
-					OUT_RING(GFX_OP_DRAWRECT_INFO);
-					OUT_RING(0);
-					OUT_RING(0);
-					OUT_RING(((width - 1) & 0xffff) | ((height - 1) << 16));
-					OUT_RING(0);
-					OUT_RING(0);
-
-					ADVANCE_LP_RING();
-				}
-
-				sarea_priv->ctxOwner = DRM_KERNEL_CONTEXT;
-
-				init_drawrect = 0;
-			}
-
 			rect = drw->rects;
-			top = upper[plane];
-			bottom = lower[plane];
-
-			front = (dev_priv->sarea_priv->pf_current_page >>
-				 (2 * plane)) & 0x3;
-			back = (front + 1) % num_pages;
+			pipe = swap_hit->pipe;
+			top = upper[pipe];
+			bottom = lower[pipe];
 
 			for (num_rects = drw->num_rects; num_rects--; rect++) {
 				int y1 = max(rect->y1, top);
@@ -341,17 +207,17 @@ static void i915_vblank_tasklet(struct drm_device *dev)
 				OUT_RING(ropcpp | dst_pitch);
 				OUT_RING((y1 << 16) | rect->x1);
 				OUT_RING((y2 << 16) | rect->x2);
-				OUT_RING(offsets[front]);
+				OUT_RING(sarea_priv->front_offset);
 				OUT_RING((y1 << 16) | rect->x1);
 				OUT_RING(src_pitch);
-				OUT_RING(offsets[back]);
+				OUT_RING(sarea_priv->back_offset);
 
 				ADVANCE_LP_RING();
 			}
 		}
 	}
 
-	spin_unlock(&dev->drw_lock);
+	spin_unlock_irqrestore(&dev->drw_lock, irqflags);
 
 	list_for_each_safe(hit, tmp, &hits) {
 		drm_i915_vbl_swap_t *swap_hit =
@@ -363,112 +229,67 @@ static void i915_vblank_tasklet(struct drm_device *dev)
 	}
 }
 
-u32 i915_get_vblank_counter(struct drm_device *dev, int plane)
-{
-	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
-	unsigned long high_frame;
-	unsigned long low_frame;
-	u32 high1, high2, low, count;
-	int pipe;
-
-	pipe = i915_get_pipe(dev, plane);
-	high_frame = pipe ? PIPEBFRAMEHIGH : PIPEAFRAMEHIGH;
-	low_frame = pipe ? PIPEBFRAMEPIXEL : PIPEAFRAMEPIXEL;
-
-	if (!i915_pipe_enabled(dev, pipe)) {
-	    printk(KERN_ERR "trying to get vblank count for disabled "
-		   "pipe %d\n", pipe);
-	    return 0;
-	}
-
-	/*
-	 * High & low register fields aren't synchronized, so make sure
-	 * we get a low value that's stable across two reads of the high
-	 * register.
-	 */
-	do {
-		high1 = ((I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK) >>
-			 PIPE_FRAME_HIGH_SHIFT);
-		low =  ((I915_READ(low_frame) & PIPE_FRAME_LOW_MASK) >>
-			PIPE_FRAME_LOW_SHIFT);
-		high2 = ((I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK) >>
-			 PIPE_FRAME_HIGH_SHIFT);
-	} while (high1 != high2);
-
-	count = (high1 << 8) | low;
-
-	/* count may be reset by other driver(e.g. 2D driver),
-	   we have no way to know if it is wrapped or resetted
-	   when count is zero. do a rough guess.
-	*/
-	if (count == 0 && dev->last_vblank[pipe] < dev->max_vblank_count/2)
-		dev->last_vblank[pipe] = 0;
-
-	return count;
-}
-
 irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
 {
 	struct drm_device *dev = (struct drm_device *) arg;
 	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
-	u32 iir;
+	u16 temp;
 	u32 pipea_stats, pipeb_stats;
-	int vblank = 0;
-
-	iir = I915_READ(I915REG_INT_IDENTITY_R);
-	if (iir == 0) {
-		DRM_DEBUG ("iir 0x%08x im 0x%08x ie 0x%08x pipea 0x%08x pipeb 0x%08x\n",
-			   iir,
-			   I915_READ(I915REG_INT_MASK_R),
-			   I915_READ(I915REG_INT_ENABLE_R),
-			   I915_READ(I915REG_PIPEASTAT),
-			   I915_READ(I915REG_PIPEBSTAT));
-		return IRQ_NONE;
-	}
 
-	/*
-	 * Clear the PIPE(A|B)STAT regs before the IIR otherwise
-	 * we may get extra interrupts.
-	 */
-	if (iir & I915_DISPLAY_PIPE_A_EVENT_INTERRUPT) {
-		pipea_stats = I915_READ(I915REG_PIPEASTAT);
-		if (pipea_stats & (I915_START_VBLANK_INTERRUPT_STATUS|
-				   I915_VBLANK_INTERRUPT_STATUS))
-		{
-			vblank++;
-			drm_handle_vblank(dev, i915_get_plane(dev, 0));
-		}
-		I915_WRITE(I915REG_PIPEASTAT, pipea_stats);
-	}
-	if (iir & I915_DISPLAY_PIPE_B_EVENT_INTERRUPT) {
-		pipeb_stats = I915_READ(I915REG_PIPEBSTAT);
-		if (pipeb_stats & (I915_START_VBLANK_INTERRUPT_STATUS|
-				   I915_VBLANK_INTERRUPT_STATUS))
-		{
-			vblank++;
-			drm_handle_vblank(dev, i915_get_plane(dev, 1));
-		}
-		I915_WRITE(I915REG_PIPEBSTAT, pipeb_stats);
-	}
+	pipea_stats = I915_READ(I915REG_PIPEASTAT);
+	pipeb_stats = I915_READ(I915REG_PIPEBSTAT);
 
-	if (dev_priv->sarea_priv)
-	    dev_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
+	temp = I915_READ16(I915REG_INT_IDENTITY_R);
 
-	I915_WRITE(I915REG_INT_IDENTITY_R, iir);
-	(void) I915_READ(I915REG_INT_IDENTITY_R); /* Flush posted write */
+	temp &= (USER_INT_FLAG | VSYNC_PIPEA_FLAG | VSYNC_PIPEB_FLAG);
 
-	if (iir & I915_USER_INTERRUPT) {
+	DRM_DEBUG("%s flag=%08x\n", __FUNCTION__, temp);
+
+	if (temp == 0)
+		return IRQ_NONE;
+
+	I915_WRITE16(I915REG_INT_IDENTITY_R, temp);
+	(void) I915_READ16(I915REG_INT_IDENTITY_R);
+	DRM_READMEMORYBARRIER();
+
+	dev_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
+
+	if (temp & USER_INT_FLAG)
 		DRM_WAKEUP(&dev_priv->irq_queue);
-	}
-	if (vblank) {
+
+	if (temp & (VSYNC_PIPEA_FLAG | VSYNC_PIPEB_FLAG)) {
+		int vblank_pipe = dev_priv->vblank_pipe;
+
+		if ((vblank_pipe &
+		     (DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B))
+		    == (DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B)) {
+			if (temp & VSYNC_PIPEA_FLAG)
+				atomic_inc(&dev->vbl_received);
+			if (temp & VSYNC_PIPEB_FLAG)
+				atomic_inc(&dev->vbl_received2);
+		} else if (((temp & VSYNC_PIPEA_FLAG) &&
+			    (vblank_pipe & DRM_I915_VBLANK_PIPE_A)) ||
+			   ((temp & VSYNC_PIPEB_FLAG) &&
+			    (vblank_pipe & DRM_I915_VBLANK_PIPE_B)))
+			atomic_inc(&dev->vbl_received);
+
+		DRM_WAKEUP(&dev->vbl_queue);
+		drm_vbl_send_signals(dev);
+
 		if (dev_priv->swaps_pending > 0)
 			drm_locked_tasklet(dev, i915_vblank_tasklet);
+		I915_WRITE(I915REG_PIPEASTAT,
+			pipea_stats|I915_VBLANK_INTERRUPT_ENABLE|
+			I915_VBLANK_CLEAR);
+		I915_WRITE(I915REG_PIPEBSTAT,
+			pipeb_stats|I915_VBLANK_INTERRUPT_ENABLE|
+			I915_VBLANK_CLEAR);
 	}
 
 	return IRQ_HANDLED;
 }
 
-static int i915_emit_irq(struct drm_device *dev)
+static int i915_emit_irq(struct drm_device * dev)
 {
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	RING_LOCALS;
@@ -515,12 +336,42 @@ static int i915_wait_irq(struct drm_device * dev, int irq_nr)
 			  READ_BREADCRUMB(dev_priv), (int)dev_priv->counter);
 	}
 
-	if (dev_priv->sarea_priv)
-		dev_priv->sarea_priv->last_dispatch =
-			READ_BREADCRUMB(dev_priv);
+	dev_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 	return ret;
 }
 
+static int i915_driver_vblank_do_wait(struct drm_device *dev, unsigned int *sequence,
+				      atomic_t *counter)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	unsigned int cur_vblank;
+	int ret = 0;
+
+	if (!dev_priv) {
+		DRM_ERROR("called with no initialization\n");
+		return -EINVAL;
+	}
+
+	DRM_WAIT_ON(ret, dev->vbl_queue, 3 * DRM_HZ,
+		    (((cur_vblank = atomic_read(counter))
+			- *sequence) <= (1<<23)));
+
+	*sequence = cur_vblank;
+
+	return ret;
+}
+
+
+int i915_driver_vblank_wait(struct drm_device *dev, unsigned int *sequence)
+{
+	return i915_driver_vblank_do_wait(dev, sequence, &dev->vbl_received);
+}
+
+int i915_driver_vblank_wait2(struct drm_device *dev, unsigned int *sequence)
+{
+	return i915_driver_vblank_do_wait(dev, sequence, &dev->vbl_received2);
+}
+
 /* Needs the lock as it touches the ring.
  */
 int i915_irq_emit(struct drm_device *dev, void *data,
@@ -563,96 +414,18 @@ int i915_irq_wait(struct drm_device *dev, void *data,
 	return i915_wait_irq(dev, irqwait->irq_seq);
 }
 
-int i915_enable_vblank(struct drm_device *dev, int plane)
-{
-	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
-	int pipe = i915_get_pipe(dev, plane);
-	u32	pipestat_reg = 0;
-	u32	pipestat;
-
-	switch (pipe) {
-	case 0:
-		pipestat_reg = I915REG_PIPEASTAT;
-		dev_priv->irq_enable_reg |= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT;
-		break;
-	case 1:
-		pipestat_reg = I915REG_PIPEBSTAT;
-		dev_priv->irq_enable_reg |= I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
-		break;
-	default:
-		DRM_ERROR("tried to enable vblank on non-existent pipe %d\n",
-			  pipe);
-		break;
-	}
-
-	if (pipestat_reg)
-	{
-		pipestat = I915_READ (pipestat_reg);
-		/*
-		 * Older chips didn't have the start vblank interrupt,
-		 * but
-		 */
-		if (IS_I965G (dev))
-			pipestat |= I915_START_VBLANK_INTERRUPT_ENABLE;
-		else
-			pipestat |= I915_VBLANK_INTERRUPT_ENABLE;
-		/*
-		 * Clear any pending status
-		 */
-		pipestat |= (I915_START_VBLANK_INTERRUPT_STATUS |
-			     I915_VBLANK_INTERRUPT_STATUS);
-		I915_WRITE(pipestat_reg, pipestat);
-	}
-	I915_WRITE(I915REG_INT_ENABLE_R, dev_priv->irq_enable_reg);
-
-	return 0;
-}
-
-void i915_disable_vblank(struct drm_device *dev, int plane)
-{
-	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
-	int pipe = i915_get_pipe(dev, plane);
-	u32	pipestat_reg = 0;
-	u32	pipestat;
-
-	switch (pipe) {
-	case 0:
-		pipestat_reg = I915REG_PIPEASTAT;
-		dev_priv->irq_enable_reg &= ~I915_DISPLAY_PIPE_A_EVENT_INTERRUPT;
-		break;
-	case 1:
-		pipestat_reg = I915REG_PIPEBSTAT;
-		dev_priv->irq_enable_reg &= ~I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
-		break;
-	default:
-		DRM_ERROR("tried to disable vblank on non-existent pipe %d\n",
-			  pipe);
-		break;
-	}
-
-	I915_WRITE(I915REG_INT_ENABLE_R, dev_priv->irq_enable_reg);
-	if (pipestat_reg)
-	{
-		pipestat = I915_READ (pipestat_reg);
-		pipestat &= ~(I915_START_VBLANK_INTERRUPT_ENABLE |
-			      I915_VBLANK_INTERRUPT_ENABLE);
-		/*
-		 * Clear any pending status
-		 */
-		pipestat |= (I915_START_VBLANK_INTERRUPT_STATUS |
-			     I915_VBLANK_INTERRUPT_STATUS);
-		I915_WRITE(pipestat_reg, pipestat);
-	}
-}
-
 static void i915_enable_interrupt (struct drm_device *dev)
 {
 	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+	u16 flag;
 
-	dev_priv->irq_enable_reg |= I915_USER_INTERRUPT;
+	flag = 0;
+	if (dev_priv->vblank_pipe & DRM_I915_VBLANK_PIPE_A)
+		flag |= VSYNC_PIPEA_FLAG;
+	if (dev_priv->vblank_pipe & DRM_I915_VBLANK_PIPE_B)
+		flag |= VSYNC_PIPEB_FLAG;
 
-	I915_WRITE(I915REG_INT_ENABLE_R, dev_priv->irq_enable_reg);
-	dev_priv->irq_enabled = 1;
+	I915_WRITE16(I915REG_INT_ENABLE_R, USER_INT_FLAG | flag);
 }
 
 /* Set the vblank monitor pipe
@@ -675,6 +448,8 @@ int i915_vblank_pipe_set(struct drm_device *dev, void *data,
 
 	dev_priv->vblank_pipe = pipe->pipe;
 
+	i915_enable_interrupt (dev);
+
 	return 0;
 }
 
@@ -692,9 +467,9 @@ int i915_vblank_pipe_get(struct drm_device *dev, void *data,
 
 	flag = I915_READ(I915REG_INT_ENABLE_R);
 	pipe->pipe = 0;
-	if (flag & I915_DISPLAY_PIPE_A_EVENT_INTERRUPT)
+	if (flag & VSYNC_PIPEA_FLAG)
 		pipe->pipe |= DRM_I915_VBLANK_PIPE_A;
-	if (flag & I915_DISPLAY_PIPE_B_EVENT_INTERRUPT)
+	if (flag & VSYNC_PIPEB_FLAG)
 		pipe->pipe |= DRM_I915_VBLANK_PIPE_B;
 
 	return 0;
@@ -709,30 +484,27 @@ int i915_vblank_swap(struct drm_device *dev, void *data,
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	drm_i915_vblank_swap_t *swap = data;
 	drm_i915_vbl_swap_t *vbl_swap;
-	unsigned int pipe, seqtype, curseq, plane;
+	unsigned int pipe, seqtype, curseq;
 	unsigned long irqflags;
 	struct list_head *list;
-	int ret;
 
 	if (!dev_priv) {
 		DRM_ERROR("%s called with no initialization\n", __func__);
 		return -EINVAL;
 	}
 
-	if (!dev_priv->sarea_priv || dev_priv->sarea_priv->rotation) {
+	if (dev_priv->sarea_priv->rotation) {
 		DRM_DEBUG("Rotation not supported\n");
 		return -EINVAL;
 	}
 
 	if (swap->seqtype & ~(_DRM_VBLANK_RELATIVE | _DRM_VBLANK_ABSOLUTE |
-			     _DRM_VBLANK_SECONDARY | _DRM_VBLANK_NEXTONMISS |
-			     _DRM_VBLANK_FLIP)) {
+			     _DRM_VBLANK_SECONDARY | _DRM_VBLANK_NEXTONMISS)) {
 		DRM_ERROR("Invalid sequence type 0x%x\n", swap->seqtype);
 		return -EINVAL;
 	}
 
-	plane = (swap->seqtype & _DRM_VBLANK_SECONDARY) ? 1 : 0;
-	pipe = i915_get_pipe(dev, plane);
+	pipe = (swap->seqtype & _DRM_VBLANK_SECONDARY) ? 1 : 0;
 
 	seqtype = swap->seqtype & (_DRM_VBLANK_RELATIVE | _DRM_VBLANK_ABSOLUTE);
 
@@ -743,11 +515,6 @@ int i915_vblank_swap(struct drm_device *dev, void *data,
 
 	spin_lock_irqsave(&dev->drw_lock, irqflags);
 
-	/* It makes no sense to schedule a swap for a drawable that doesn't have
-	 * valid information at this point. E.g. this could mean that the X
-	 * server is too old to push drawable information to the DRM, in which
-	 * case all such swaps would become ineffective.
-	 */
 	if (!drm_get_drawable_info(dev, swap->drawable)) {
 		spin_unlock_irqrestore(&dev->drw_lock, irqflags);
 		DRM_DEBUG("Invalid drawable ID %d\n", swap->drawable);
@@ -756,8 +523,7 @@ int i915_vblank_swap(struct drm_device *dev, void *data,
 
 	spin_unlock_irqrestore(&dev->drw_lock, irqflags);
 
-	drm_update_vblank_count(dev, pipe);
-	curseq = drm_vblank_count(dev, pipe);
+	curseq = atomic_read(pipe ? &dev->vbl_received2 : &dev->vbl_received);
 
 	if (seqtype == _DRM_VBLANK_RELATIVE)
 		swap->sequence += curseq;
@@ -771,43 +537,14 @@ int i915_vblank_swap(struct drm_device *dev, void *data,
 		}
 	}
 
-	if (swap->seqtype & _DRM_VBLANK_FLIP) {
-		swap->sequence--;
-
-		if ((curseq - swap->sequence) <= (1<<23)) {
-			struct drm_drawable_info *drw;
-
-			LOCK_TEST_WITH_RETURN(dev, file_priv);
-
-			spin_lock_irqsave(&dev->drw_lock, irqflags);
-
-			drw = drm_get_drawable_info(dev, swap->drawable);
-
-			if (!drw) {
-				spin_unlock_irqrestore(&dev->drw_lock,
-				    irqflags);
-				DRM_DEBUG("Invalid drawable ID %d\n",
-					  swap->drawable);
-				return -EINVAL;
-			}
-
-			i915_dispatch_vsync_flip(dev, drw, plane);
-
-			spin_unlock_irqrestore(&dev->drw_lock, irqflags);
-
-			return 0;
-		}
-	}
-
 	spin_lock_irqsave(&dev_priv->swaps_lock, irqflags);
 
 	list_for_each(list, &dev_priv->vbl_swaps.head) {
 		vbl_swap = list_entry(list, drm_i915_vbl_swap_t, head);
 
 		if (vbl_swap->drw_id == swap->drawable &&
-		    vbl_swap->plane == plane &&
+		    vbl_swap->pipe == pipe &&
 		    vbl_swap->sequence == swap->sequence) {
-			vbl_swap->flip = (swap->seqtype & _DRM_VBLANK_FLIP);
 			spin_unlock_irqrestore(&dev_priv->swaps_lock, irqflags);
 			DRM_DEBUG("Already scheduled\n");
 			return 0;
@@ -830,19 +567,9 @@ int i915_vblank_swap(struct drm_device *dev, void *data,
 
 	DRM_DEBUG("\n");
 
-	ret = drm_vblank_get(dev, pipe);
-	if (ret) {
-		drm_free(vbl_swap, sizeof(*vbl_swap), DRM_MEM_DRIVER);
-		return ret;
-	}
-
 	vbl_swap->drw_id = swap->drawable;
-	vbl_swap->plane = plane;
+	vbl_swap->pipe = pipe;
 	vbl_swap->sequence = swap->sequence;
-	vbl_swap->flip = (swap->seqtype & _DRM_VBLANK_FLIP);
-
-	if (vbl_swap->flip)
-		swap->sequence++;
 
 	spin_lock_irqsave(&dev_priv->swaps_lock, irqflags);
 
@@ -860,57 +587,37 @@ void i915_driver_irq_preinstall(struct drm_device * dev)
 {
 	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 
-	I915_WRITE16(I915REG_HWSTAM, 0xeffe);
+	I915_WRITE16(I915REG_HWSTAM, 0xfffe);
 	I915_WRITE16(I915REG_INT_MASK_R, 0x0);
 	I915_WRITE16(I915REG_INT_ENABLE_R, 0x0);
 }
 
-int i915_driver_irq_postinstall(struct drm_device * dev)
+void i915_driver_irq_postinstall(struct drm_device * dev)
 {
 	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
-	int ret, num_pipes = 2;
 
 	spin_lock_init(&dev_priv->swaps_lock);
 	INIT_LIST_HEAD(&dev_priv->vbl_swaps.head);
 	dev_priv->swaps_pending = 0;
 
-	dev_priv->user_irq_refcount = 0;
-	dev_priv->irq_enable_reg = 0;
-
-	ret = drm_vblank_init(dev, num_pipes);
-	if (ret)
-		return ret;
-
-	dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
-
+	if (!dev_priv->vblank_pipe)
+		dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A;
 	i915_enable_interrupt(dev);
 	DRM_INIT_WAITQUEUE(&dev_priv->irq_queue);
-
-	/*
-	 * Initialize the hardware status page IRQ location.
-	 */
-
-	I915_WRITE(I915REG_INSTPM, (1 << 5) | (1 << 21));
-	return 0;
 }
 
 void i915_driver_irq_uninstall(struct drm_device * dev)
 {
 	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
-	u32 temp;
+	u16 temp;
 
 	if (!dev_priv)
 		return;
 
-	dev_priv->irq_enabled = 0;
-	I915_WRITE(I915REG_HWSTAM, 0xffffffff);
-	I915_WRITE(I915REG_INT_MASK_R, 0xffffffff);
-	I915_WRITE(I915REG_INT_ENABLE_R, 0x0);
-
-	temp = I915_READ(I915REG_PIPEASTAT);
-	I915_WRITE(I915REG_PIPEASTAT, temp);
-	temp = I915_READ(I915REG_PIPEBSTAT);
-	I915_WRITE(I915REG_PIPEBSTAT, temp);
-	temp = I915_READ(I915REG_INT_IDENTITY_R);
-	I915_WRITE(I915REG_INT_IDENTITY_R, temp);
+	I915_WRITE16(I915REG_HWSTAM, 0xffff);
+	I915_WRITE16(I915REG_INT_MASK_R, 0xffff);
+	I915_WRITE16(I915REG_INT_ENABLE_R, 0x0);
+
+	temp = I915_READ16(I915REG_INT_IDENTITY_R);
+	I915_WRITE16(I915REG_INT_IDENTITY_R, temp);
 }