intelfb: add vsync interrupt support
[04/05] intelfb: implement FBIO_WAITFORVSYNC ioctl
The (unofficial) FBIO_WAITFORVSYNC ioctl is implemented by sleeping on the appropriate waitqueue, as defined in my earlier patch. Currently, only display 0 (aka pipe A) is supported.
Signed-off-by: Eric Hustvedt <ehustvedt@cecropia.com>
diff --git a/drivers/video/intelfb/intelfbdrv.c b/drivers/video/intelfb/intelfbdrv.c
index 068c56d..08f8241 100644
--- a/drivers/video/intelfb/intelfbdrv.c
+++ b/drivers/video/intelfb/intelfbdrv.c
@@ -1473,6 +1473,19 @@
intelfb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
{
int retval = 0;
+ struct intelfb_info *dinfo = GET_DINFO(info);
+ u32 pipe = 0;
+
+ switch (cmd) {
+ case FBIO_WAITFORVSYNC:
+ if (get_user(pipe, (__u32 __user *)arg))
+ return -EFAULT;
+
+ retval = intelfbhw_wait_for_vsync(dinfo, pipe);
+ break;
+ default:
+ break;
+ }
return retval;
}