5.4-stable review patch. If anyone has any objections, please let me know.
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From: Ricardo Ribalda ribalda@chromium.org
[ Upstream commit 65900c581d014499f0f8ceabfc02c652e9a88771 ]
Allows controls to get their properties and current value from an entity-defined function instead of via a query to the USB device.
Signed-off-by: Ricardo Ribalda ribalda@chromium.org Signed-off-by: Laurent Pinchart laurent.pinchart@ideasonboard.com Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Stable-dep-of: 86419686e66d ("media: uvcvideo: Override default flags") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/usb/uvc/uvc_ctrl.c | 22 ++++++++++++++++++---- drivers/media/usb/uvc/uvcvideo.h | 5 +++++ 2 files changed, 23 insertions(+), 4 deletions(-)
diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c index e0d894c61f4b7..13723fccb9000 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -1002,10 +1002,20 @@ static int __uvc_ctrl_get(struct uvc_video_chain *chain, return -EACCES;
if (!ctrl->loaded) { - ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, ctrl->entity->id, - chain->dev->intfnum, ctrl->info.selector, + if (ctrl->entity->get_cur) { + ret = ctrl->entity->get_cur(chain->dev, + ctrl->entity, + ctrl->info.selector, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), ctrl->info.size); + } else { + ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, + ctrl->entity->id, + chain->dev->intfnum, + ctrl->info.selector, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), + ctrl->info.size); + } if (ret < 0) return ret;
@@ -1718,8 +1728,12 @@ static int uvc_ctrl_get_flags(struct uvc_device *dev, if (data == NULL) return -ENOMEM;
- ret = uvc_query_ctrl(dev, UVC_GET_INFO, ctrl->entity->id, dev->intfnum, - info->selector, data, 1); + if (ctrl->entity->get_info) + ret = ctrl->entity->get_info(dev, ctrl->entity, + ctrl->info.selector, data); + else + ret = uvc_query_ctrl(dev, UVC_GET_INFO, ctrl->entity->id, + dev->intfnum, info->selector, data, 1); if (!ret) info->flags |= (data[0] & UVC_CONTROL_CAP_GET ? UVC_CTRL_FLAG_GET_CUR : 0) diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index 9f5b9601eadcf..97817b350f988 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -350,6 +350,11 @@ struct uvc_entity { u8 bNrInPins; u8 *baSourceID;
+ int (*get_info)(struct uvc_device *dev, struct uvc_entity *entity, + u8 cs, u8 *caps); + int (*get_cur)(struct uvc_device *dev, struct uvc_entity *entity, + u8 cs, void *data, u16 size); + unsigned int ncontrols; struct uvc_control *controls; };