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| author | Mauro Carvalho Chehab <mchehab@infradead.org> | 2008-08-22 22:25:10 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2008-08-22 22:25:10 +0200 |
| commit | b9aca43eb2eafceff7b73afbee44844fb943e8b0 (patch) | |
| tree | be380eff53a8f4f7f29cfbd62eaae8ae6654b975 /linux/drivers/media/video | |
| parent | fc53849a0545682a680b40f9b083aeea025e80a2 (diff) | |
| download | mediapointer-dvb-s2-b9aca43eb2eafceff7b73afbee44844fb943e8b0.tar.gz mediapointer-dvb-s2-b9aca43eb2eafceff7b73afbee44844fb943e8b0.tar.bz2 | |
uvcvideo: Implement the USB power management reset_resume method.
From: Laurent Pinchart <laurent.pinchart@skynet.be>
When a suspended device has been reset instead of being resumed, USB core
calls the reset_resume method if available instead of unbinding and rebinding
the device.
This patch implements reset_resume by reusing the current resume
implementation and simplifies the resume method by skipping the controls
restore stage. Resuming from autosuspend should be faster.
Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'linux/drivers/media/video')
| -rw-r--r-- | linux/drivers/media/video/uvc/uvc_driver.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/linux/drivers/media/video/uvc/uvc_driver.c b/linux/drivers/media/video/uvc/uvc_driver.c index 7e102034d..4a2d09988 100644 --- a/linux/drivers/media/video/uvc/uvc_driver.c +++ b/linux/drivers/media/video/uvc/uvc_driver.c @@ -1663,7 +1663,7 @@ static int uvc_suspend(struct usb_interface *intf, pm_message_t message) return uvc_video_suspend(&dev->video); } -static int uvc_resume(struct usb_interface *intf) +static int __uvc_resume(struct usb_interface *intf, int reset) { struct uvc_device *dev = usb_get_intfdata(intf); int ret; @@ -1672,7 +1672,7 @@ static int uvc_resume(struct usb_interface *intf) intf->cur_altsetting->desc.bInterfaceNumber); if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOCONTROL) { - if ((ret = uvc_ctrl_resume_device(dev)) < 0) + if (reset && (ret = uvc_ctrl_resume_device(dev)) < 0) return ret; return uvc_status_resume(dev); @@ -1687,6 +1687,16 @@ static int uvc_resume(struct usb_interface *intf) return uvc_video_resume(&dev->video); } +static int uvc_resume(struct usb_interface *intf) +{ + return __uvc_resume(intf, 0); +} + +static int uvc_reset_resume(struct usb_interface *intf) +{ + return __uvc_resume(intf, 1); +} + /* ------------------------------------------------------------------------ * Driver initialization and cleanup */ @@ -1952,6 +1962,7 @@ struct uvc_driver uvc_driver = { .disconnect = uvc_disconnect, .suspend = uvc_suspend, .resume = uvc_resume, + .reset_resume = uvc_reset_resume, .id_table = uvc_ids, .supports_autosuspend = 1, }, |