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media: uvcvideo: Provide sync and async uvc_ctrl_status_event 

Split the functionality of void uvc_ctrl_status_event_work in two, so it
can be called by functions outside interrupt context and not part of an
URB.

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>
This commit is contained in:
Ricardo Ribalda 2020-12-23 14:35:20 +01:00 committed by Mauro Carvalho Chehab
parent 7532dad663
commit d9c8763e61
3 changed files with 20 additions and 12 deletions
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25
drivers/media/usb/uvc/uvc_ctrl.c
View File

@ -1254,17 +1254,12 @@ static void uvc_ctrl_send_slave_event(struct uvc_video_chain *chain,
uvc_ctrl_send_event(chain, handle, ctrl, mapping, val, changes);
}
static void uvc_ctrl_status_event_work(struct work_struct *work)
void uvc_ctrl_status_event(struct uvc_video_chain *chain,
struct uvc_control *ctrl, const u8 *data)
{
struct uvc_device *dev = container_of(work, struct uvc_device,
async_ctrl.work);
struct uvc_ctrl_work *w = &dev->async_ctrl;
struct uvc_video_chain *chain = w->chain;
struct uvc_control_mapping *mapping;
struct uvc_control *ctrl = w->ctrl;
struct uvc_fh *handle;
unsigned int i;
int ret;
mutex_lock(&chain->ctrl_mutex);
@ -1272,7 +1267,7 @@ static void uvc_ctrl_status_event_work(struct work_struct *work)
ctrl->handle = NULL;
list_for_each_entry(mapping, &ctrl->info.mappings, list) {
s32 value = __uvc_ctrl_get_value(mapping, w->data);
s32 value = __uvc_ctrl_get_value(mapping, data);
/*
* handle may be NULL here if the device sends auto-update
@ -1291,6 +1286,16 @@ static void uvc_ctrl_status_event_work(struct work_struct *work)
}
mutex_unlock(&chain->ctrl_mutex);
}
static void uvc_ctrl_status_event_work(struct work_struct *work)
{
struct uvc_device *dev = container_of(work, struct uvc_device,
async_ctrl.work);
struct uvc_ctrl_work *w = &dev->async_ctrl;
int ret;
uvc_ctrl_status_event(w->chain, w->ctrl, w->data);
/* Resubmit the URB. */
w->urb->interval = dev->int_ep->desc.bInterval;
@ -1300,8 +1305,8 @@ static void uvc_ctrl_status_event_work(struct work_struct *work)
ret);
}
bool uvc_ctrl_status_event(struct urb *urb, struct uvc_video_chain *chain,
struct uvc_control *ctrl, const u8 *data)
bool uvc_ctrl_status_event_async(struct urb *urb, struct uvc_video_chain *chain,
struct uvc_control *ctrl, const u8 *data)
{
struct uvc_device *dev = chain->dev;
struct uvc_ctrl_work *w = &dev->async_ctrl;

3
drivers/media/usb/uvc/uvc_status.c
View File

@ -179,7 +179,8 @@ static bool uvc_event_control(struct urb *urb,
switch (status->bAttribute) {
case UVC_CTRL_VALUE_CHANGE:
return uvc_ctrl_status_event(urb, chain, ctrl, status->bValue);
return uvc_ctrl_status_event_async(urb, chain, ctrl,
status->bValue);
case UVC_CTRL_INFO_CHANGE:
case UVC_CTRL_FAILURE_CHANGE:

4
drivers/media/usb/uvc/uvcvideo.h
View File

@ -844,7 +844,9 @@ int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
int uvc_ctrl_init_device(struct uvc_device *dev);
void uvc_ctrl_cleanup_device(struct uvc_device *dev);
int uvc_ctrl_restore_values(struct uvc_device *dev);
bool uvc_ctrl_status_event(struct urb *urb, struct uvc_video_chain *chain,
bool uvc_ctrl_status_event_async(struct urb *urb, struct uvc_video_chain *chain,
struct uvc_control *ctrl, const u8 *data);
void uvc_ctrl_status_event(struct uvc_video_chain *chain,
struct uvc_control *ctrl, const u8 *data);
int uvc_ctrl_begin(struct uvc_video_chain *chain);