vertical blank ioctl can send signal instead of blocking

4 files changed, 29 insertions, 8 deletions

diff --git a/shared-core/drm.h b/shared-core/drm.h
index f26d4442..d3c9f158 100644
--- a/shared-core/drm.h
+++ b/shared-core/drm.h
@@ -346,17 +346,30 @@ typedef struct drm_irq_busid {
 } drm_irq_busid_t;
 
 typedef enum {
-    _DRM_VBLANK_ABSOLUTE = 0x0,	/* Wait for specific vblank sequence number */
-    _DRM_VBLANK_RELATIVE = 0x1	/* Wait for given number of vblanks */
+    _DRM_VBLANK_ABSOLUTE = 0x0,		/* Wait for specific vblank sequence number */
+    _DRM_VBLANK_RELATIVE = 0x1,		/* Wait for given number of vblanks */
+    _DRM_VBLANK_SIGNAL   = 0x80000000	/* Send signal instead of blocking */
 } drm_vblank_seq_type_t;
 
-typedef struct drm_radeon_vbl_wait {
+#define _DRM_VBLANK_FLAGS_MASK _DRM_VBLANK_SIGNAL
+
+struct drm_wait_vblank_request {
+	drm_vblank_seq_type_t type;
+	unsigned int sequence;
+	unsigned long signal;
+};
+
+struct drm_wait_vblank_reply {
 	drm_vblank_seq_type_t type;
 	unsigned int sequence;
 	long tval_sec;
 	long tval_usec;
-} drm_wait_vblank_t;
+};
 
+typedef union drm_wait_vblank {
+	struct drm_wait_vblank_request request;
+	struct drm_wait_vblank_reply reply;
+} drm_wait_vblank_t;
 
 typedef struct drm_agp_mode {
 	unsigned long mode;
diff --git a/shared-core/mga_irq.c b/shared-core/mga_irq.c
index 568d193f..30ee7834 100644
--- a/shared-core/mga_irq.c
+++ b/shared-core/mga_irq.c
@@ -50,6 +50,10 @@ void mga_dma_service( DRM_IRQ_ARGS )
 		MGA_WRITE( MGA_ICLEAR, MGA_VLINEICLR );
 		atomic_inc(&dev->vbl_received);
 		DRM_WAKEUP(&dev->vbl_queue);
+
+		/* kick off bottom half for signals */
+		queue_task(&dev->vbl_tq, &tq_immediate);
+		mark_bh(IMMEDIATE_BH);
 	}
 }
 
diff --git a/shared-core/r128_irq.c b/shared-core/r128_irq.c
index a29a81b5..722f2362 100644
--- a/shared-core/r128_irq.c
+++ b/shared-core/r128_irq.c
@@ -50,6 +50,10 @@ void r128_dma_service( DRM_IRQ_ARGS )
 		R128_WRITE( R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK );
 		atomic_inc(&dev->vbl_received);
 		DRM_WAKEUP(&dev->vbl_queue);
+
+		/* kick off bottom half for signals */
+		queue_task(&dev->vbl_tq, &tq_immediate);
+		mark_bh(IMMEDIATE_BH);
 	}
 }
 
diff --git a/shared-core/radeon_irq.c b/shared-core/radeon_irq.c
index 54702bee..b8f33f95 100644
--- a/shared-core/radeon_irq.c
+++ b/shared-core/radeon_irq.c
@@ -70,13 +70,15 @@ void DRM(dma_service)( DRM_IRQ_ARGS )
 		DRM_WAKEUP( &dev_priv->swi_queue );
 	}
 
-#if __HAVE_VBL_IRQ
 	/* VBLANK interrupt */
 	if (stat & RADEON_CRTC_VBLANK_STAT) {
 		atomic_inc(&dev->vbl_received);
 		DRM_WAKEUP(&dev->vbl_queue);
+
+		/* kick off bottom half for signals */
+		queue_task(&dev->vbl_tq, &tq_immediate);
+		mark_bh(IMMEDIATE_BH);
 	}
-#endif
 
 	/* Acknowledge all the bits in GEN_INT_STATUS -- seem to get
 	 * more than we asked for...
@@ -138,7 +140,6 @@ int radeon_emit_and_wait_irq(drm_device_t *dev)
 }
 
 
-#if __HAVE_VBL_IRQ
 int DRM(vblank_wait)(drm_device_t *dev, unsigned int *sequence)
 {
   	drm_radeon_private_t *dev_priv = 
@@ -167,7 +168,6 @@ int DRM(vblank_wait)(drm_device_t *dev, unsigned int *sequence)
 
 	return ret;
 }
-#endif
 
 
 /* Needs the lock as it touches the ring.