diff options
| -rw-r--r-- | drivers/media/usb/uvc/uvc_ctrl.c | 2 | ||||
| -rw-r--r-- | drivers/media/usb/uvc/uvc_driver.c | 11 | ||||
| -rw-r--r-- | drivers/media/usb/uvc/uvc_video.c | 6 | ||||
| -rw-r--r-- | drivers/media/usb/uvc/uvcvideo.h | 3 |
4 files changed, 19 insertions, 3 deletions
diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c index d2d1755..3e59b28 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -1847,7 +1847,7 @@ done: * - Handle restore order (Auto-Exposure Mode should be restored before * Exposure Time). */ -int uvc_ctrl_resume_device(struct uvc_device *dev) +int uvc_ctrl_restore_values(struct uvc_device *dev) { struct uvc_control *ctrl; struct uvc_entity *entity; diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c index f8135f4..51dfa74 100644 --- a/drivers/media/usb/uvc/uvc_driver.c +++ b/drivers/media/usb/uvc/uvc_driver.c @@ -2000,7 +2000,7 @@ static int __uvc_resume(struct usb_interface *intf, int reset) int ret = 0; if (reset) { - ret = uvc_ctrl_resume_device(dev); + ret = uvc_ctrl_restore_values(dev); if (ret < 0) return ret; } @@ -2175,6 +2175,15 @@ static struct usb_device_id uvc_ids[] = { .bInterfaceClass = USB_CLASS_VENDOR_SPEC, .bInterfaceSubClass = 1, .bInterfaceProtocol = 0 }, + /* Logitech HD Pro Webcam C920 */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x046d, + .idProduct = 0x082d, + .bInterfaceClass = USB_CLASS_VIDEO, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0, + .driver_info = UVC_QUIRK_RESTORE_CTRLS_ON_INIT }, /* Chicony CNF7129 (Asus EEE 100HE) */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c index 7e350d7..a2bddf4 100644 --- a/drivers/media/usb/uvc/uvc_video.c +++ b/drivers/media/usb/uvc/uvc_video.c @@ -1678,6 +1678,12 @@ static int uvc_init_video(struct uvc_streaming *stream, gfp_t gfp_flags) } } + /* The Logitech C920 temporarily forgets that it should not be adjusting + * Exposure Absolute during init so restore controls to stored values. + */ + if (stream->dev->quirks & UVC_QUIRK_RESTORE_CTRLS_ON_INIT) + uvc_ctrl_restore_values(stream->dev); + return 0; } diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index b1f69a6..39c4f94 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -147,6 +147,7 @@ #define UVC_QUIRK_FIX_BANDWIDTH 0x00000080 #define UVC_QUIRK_PROBE_DEF 0x00000100 #define UVC_QUIRK_RESTRICT_FRAME_RATE 0x00000200 +#define UVC_QUIRK_RESTORE_CTRLS_ON_INIT 0x00000400 /* Format flags */ #define UVC_FMT_FLAG_COMPRESSED 0x00000001 @@ -688,7 +689,7 @@ extern int uvc_ctrl_add_mapping(struct uvc_video_chain *chain, const struct uvc_control_mapping *mapping); extern int uvc_ctrl_init_device(struct uvc_device *dev); extern void uvc_ctrl_cleanup_device(struct uvc_device *dev); -extern int uvc_ctrl_resume_device(struct uvc_device *dev); +extern int uvc_ctrl_restore_values(struct uvc_device *dev); extern int uvc_ctrl_begin(struct uvc_video_chain *chain); extern int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback, |