Merge branch 'drm-forlinus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...

[pandora-kernel.git] / drivers / char / drm / i915_irq.c

diff --git a/drivers/char/drm/i915_irq.c b/drivers/char/drm/i915_irq.c
index a101cc9..a1381c6 100644 (file)
--- a/drivers/char/drm/i915_irq.c
+++ b/drivers/char/drm/i915_irq.c
@@ -1,7 +1,6 @@
-/* i915_dma.c -- DMA support for the I915 -*- linux-c -*-
+/* i915_irq.c -- IRQ support for the I915 -*- linux-c -*-
  */
-/**************************************************************************
- *
+/*
  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
  * All Rights Reserved.
  *
@@ -25,16 +24,18 @@
  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  *
- **************************************************************************/
+ */
 
 #include "drmP.h"
 #include "drm.h"
 #include "i915_drm.h"
 #include "i915_drv.h"
 
-#define USER_INT_FLAG 0x2
+#define USER_INT_FLAG (1<<1)
+#define VSYNC_PIPEB_FLAG (1<<5)
+#define VSYNC_PIPEA_FLAG (1<<7)
+
 #define MAX_NOPID ((u32)~0)
-#define READ_BREADCRUMB(dev_priv)  (((u32*)(dev_priv->hw_status_page))[5])
 
 irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
 {
@@ -43,7 +44,7 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
        u16 temp;
 
        temp = I915_READ16(I915REG_INT_IDENTITY_R);
-       temp &= USER_INT_FLAG;
+       temp &= (USER_INT_FLAG | VSYNC_PIPEA_FLAG);
 
        DRM_DEBUG("%s flag=%08x\n", __FUNCTION__, temp);
 
@@ -51,12 +52,20 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
                return IRQ_NONE;
 
        I915_WRITE16(I915REG_INT_IDENTITY_R, temp);
-       DRM_WAKEUP(&dev_priv->irq_queue);
+
+       if (temp & USER_INT_FLAG)
+               DRM_WAKEUP(&dev_priv->irq_queue);
+
+       if (temp & VSYNC_PIPEA_FLAG) {
+               atomic_inc(&dev->vbl_received);
+               DRM_WAKEUP(&dev->vbl_queue);
+               drm_vbl_send_signals(dev);
+       }
 
        return IRQ_HANDLED;
 }
 
-int i915_emit_irq(drm_device_t * dev)
+static int i915_emit_irq(drm_device_t * dev)
 {
        drm_i915_private_t *dev_priv = dev->dev_private;
        u32 ret;
@@ -76,7 +85,7 @@ int i915_emit_irq(drm_device_t * dev)
        return ret;
 }
 
-int i915_wait_irq(drm_device_t * dev, int irq_nr)
+static int i915_wait_irq(drm_device_t * dev, int irq_nr)
 {
        drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
        int ret = 0;
@@ -102,6 +111,27 @@ int i915_wait_irq(drm_device_t * dev, int irq_nr)
        return ret;
 }
 
+int i915_driver_vblank_wait(drm_device_t *dev, unsigned int *sequence)
+{
+       drm_i915_private_t *dev_priv = dev->dev_private;
+       unsigned int cur_vblank;
+       int ret = 0;
+
+       if (!dev_priv) {
+               DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
+               return DRM_ERR(EINVAL);
+       }
+
+       DRM_WAIT_ON(ret, dev->vbl_queue, 3 * DRM_HZ,
+                   (((cur_vblank = atomic_read(&dev->vbl_received))
+                       - *sequence) <= (1<<23)));
+       
+       *sequence = cur_vblank;
+
+       return ret;
+}
+
+
 /* Needs the lock as it touches the ring.
  */
 int i915_irq_emit(DRM_IOCTL_ARGS)
@@ -165,7 +195,7 @@ void i915_driver_irq_postinstall(drm_device_t * dev)
 {
        drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 
-       I915_WRITE16(I915REG_INT_ENABLE_R, USER_INT_FLAG);
+       I915_WRITE16(I915REG_INT_ENABLE_R, USER_INT_FLAG | VSYNC_PIPEA_FLAG);
        DRM_INIT_WAITQUEUE(&dev_priv->irq_queue);
 }