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| author | Eric Hustvedt <ehustvedt@cecropia.com> | 2006-06-20 14:36:42 -0400 |
|---|---|---|
| committer | Dave Airlie <airlied@linux.ie> | 2006-07-03 18:59:46 +1000 |
| commit | 37bced38b3d09c3de7c871790eddde81a3ce57cb (patch) | |
| tree | 9472bb814b65c990fe004e715e810eb0ac0fc120 /drivers/video/intelfb | |
| parent | 7649757bd900bc900adcd95ab08903cdc28342fa (diff) | |
| download | linux-37bced38b3d09c3de7c871790eddde81a3ce57cb.tar.gz linux-37bced38b3d09c3de7c871790eddde81a3ce57cb.tar.bz2 linux-37bced38b3d09c3de7c871790eddde81a3ce57cb.zip | |
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>
Diffstat (limited to 'drivers/video/intelfb')
| -rw-r--r-- | drivers/video/intelfb/intelfb.h | 4 | ||||
| -rw-r--r-- | drivers/video/intelfb/intelfbdrv.c | 13 | ||||
| -rw-r--r-- | drivers/video/intelfb/intelfbhw.c | 33 | ||||
| -rw-r--r-- | drivers/video/intelfb/intelfbhw.h | 1 |
4 files changed, 51 insertions, 0 deletions
diff --git a/drivers/video/intelfb/intelfb.h b/drivers/video/intelfb/intelfb.h index dab1f2d764d2..65ac37071a02 100644 --- a/drivers/video/intelfb/intelfb.h +++ b/drivers/video/intelfb/intelfb.h @@ -304,6 +304,10 @@ struct intelfb_info { #define IS_I9XX(dinfo) (((dinfo)->chipset == INTEL_915G)||(dinfo->chipset == INTEL_915GM)||((dinfo)->chipset == INTEL_945G)||(dinfo->chipset==INTEL_945GM)) +#ifndef FBIO_WAITFORVSYNC +#define FBIO_WAITFORVSYNC _IOW('F', 0x20, __u32) +#endif + /*** function prototypes ***/ extern int intelfb_var_to_depth(const struct fb_var_screeninfo *var); diff --git a/drivers/video/intelfb/intelfbdrv.c b/drivers/video/intelfb/intelfbdrv.c index 068c56d4e652..08f8241bb92a 100644 --- a/drivers/video/intelfb/intelfbdrv.c +++ b/drivers/video/intelfb/intelfbdrv.c @@ -1473,6 +1473,19 @@ static int 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; } diff --git a/drivers/video/intelfb/intelfbhw.c b/drivers/video/intelfb/intelfbhw.c index 1a698a7230e0..0f9631c2ad33 100644 --- a/drivers/video/intelfb/intelfbhw.c +++ b/drivers/video/intelfb/intelfbhw.c @@ -2019,3 +2019,36 @@ intelfbhw_disable_irq(struct intelfb_info *dinfo) { free_irq(dinfo->pdev->irq, dinfo); } } + +int +intelfbhw_wait_for_vsync(struct intelfb_info *dinfo, u32 pipe) { + struct intelfb_vsync *vsync; + unsigned int count; + int ret; + + switch (pipe) { + case 0: + vsync = &dinfo->vsync; + break; + default: + return -ENODEV; + } + + ret = intelfbhw_enable_irq(dinfo, 0); + if (ret) { + return ret; + } + + count = vsync->count; + ret = wait_event_interruptible_timeout(vsync->wait, count != vsync->count, HZ/10); + if (ret < 0) { + return ret; + } + if (ret == 0) { + intelfbhw_enable_irq(dinfo, 1); + DBG_MSG("wait_for_vsync timed out!\n"); + return -ETIMEDOUT; + } + + return 0; +} diff --git a/drivers/video/intelfb/intelfbhw.h b/drivers/video/intelfb/intelfbhw.h index aa0c139a2301..36980c785e13 100644 --- a/drivers/video/intelfb/intelfbhw.h +++ b/drivers/video/intelfb/intelfbhw.h @@ -563,5 +563,6 @@ extern void intelfbhw_cursor_load(struct intelfb_info *dinfo, int width, extern void intelfbhw_cursor_reset(struct intelfb_info *dinfo); extern int intelfbhw_enable_irq(struct intelfb_info *dinfo, int reenable); extern void intelfbhw_disable_irq(struct intelfb_info *dinfo); +extern int intelfbhw_wait_for_vsync(struct intelfb_info *dinfo, u32 pipe); #endif /* _INTELFBHW_H */ |