drm: i915: Add ioctl for scheduling buffer swaps at vertical blanks.

This uses the core facility to schedule a driver callback that will be called
ASAP after the given vertical blank interrupt with the HW lock held.

Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/char/drm/i915_drv.h b/drivers/char/drm/i915_drv.h
index 5f0c4fa04da2..334b0ce8181d 100644
--- a/drivers/char/drm/i915_drv.h
+++ b/drivers/char/drm/i915_drv.h
@@ -71,6 +71,13 @@ struct mem_block {
         DRMFILE filp;           /* 0: free, -1: heap, other: real files */
 };
 
+typedef struct _drm_i915_vbl_swap {
+        struct list_head head;
+        drm_drawable_t drw_id;
+        unsigned int pipe;
+        unsigned int sequence;
+} drm_i915_vbl_swap_t;
+
 typedef struct drm_i915_private {
         drm_local_map_t *sarea;
         drm_local_map_t *mmio_map;
@@ -83,6 +90,7 @@ typedef struct drm_i915_private {
         dma_addr_t dma_status_page;
         unsigned long counter;
 
+        unsigned int cpp;
         int back_offset;
         int front_offset;
         int current_page;
@@ -98,6 +106,10 @@ typedef struct drm_i915_private {
         struct mem_block *agp_heap;
         unsigned int sr01, adpa, ppcr, dvob, dvoc, lvds;
         int vblank_pipe;
+
+        spinlock_t swaps_lock;
+        drm_i915_vbl_swap_t vbl_swaps;
+        unsigned int swaps_pending;
 } drm_i915_private_t;
 
 extern drm_ioctl_desc_t i915_ioctls[];
@@ -124,6 +136,7 @@ extern void i915_driver_irq_postinstall(drm_device_t * dev);
 extern void i915_driver_irq_uninstall(drm_device_t * dev);
 extern int i915_vblank_pipe_set(DRM_IOCTL_ARGS);
 extern int i915_vblank_pipe_get(DRM_IOCTL_ARGS);
+extern int i915_vblank_swap(DRM_IOCTL_ARGS);
 
 /* i915_mem.c */
 extern int i915_mem_alloc(DRM_IOCTL_ARGS);
@@ -257,6 +270,10 @@ extern int i915_wait_ring(drm_device_t * dev, int n, const char *caller);
 
 #define GFX_OP_DRAWRECT_INFO_I965 ((0x7900<<16)|0x2)
 
+#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 MI_BATCH_BUFFER         ((0x30<<23)|1)
 #define MI_BATCH_BUFFER_START   (0x31<<23)
 #define MI_BATCH_BUFFER_END     (0xA<<23)