diff --git a/drivers/video/intelfb/intelfb.h b/drivers/video/intelfb/intelfb.h index dab1f2d764d29eb9b8f4f64da8e9f7b3631e4dd3..65ac37071a0295432be2ae7ad5b91d0aeac90412 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 068c56d4e6528ca556001d2aba95e3c89186d0c3..08f8241bb92a21c534014d8818698b08c0041007 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 1a698a7230e0bd0ab434a370db38a7894592d07e..0f9631c2ad33c0d90fe491ba37821abf2fad8423 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 aa0c139a2301fbbd285c343017c435944b38e90a..36980c785e13ebbd4c560da7491ad7d050e08c80 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 */