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Message-Id: <20250602-uvc-grannular-invert-v2-4-c871934ad880@chromium.org>
Date: Mon, 02 Jun 2025 13:06:16 +0000
From: Ricardo Ribalda <ribalda@...omium.org>
To: Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Hans de Goede <hdegoede@...hat.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Hans Verkuil <hverkuil@...all.nl>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
Ricardo Ribalda <ribalda@...omium.org>
Subject: [PATCH v2 4/9] media: uvcvideo: Remove stream->is_streaming field
The is_streaming field is used by modular PM to know if the device is
currently streaming or not.
With the transition to vb2 and fop helpers, we can use vb2 functions for
the same functionality. The great benefit is that vb2 already takes
track of the streaming state for us.
Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
---
drivers/media/usb/uvc/uvc_queue.c | 11 ++++++++-
drivers/media/usb/uvc/uvc_v4l2.c | 51 ++-------------------------------------
drivers/media/usb/uvc/uvcvideo.h | 1 -
3 files changed, 12 insertions(+), 51 deletions(-)
diff --git a/drivers/media/usb/uvc/uvc_queue.c b/drivers/media/usb/uvc/uvc_queue.c
index 72c5494dee9f46ff61072e7d293bfaddda40e615..dff93bec204428b8aebc09332e0322fa68823fa4 100644
--- a/drivers/media/usb/uvc/uvc_queue.c
+++ b/drivers/media/usb/uvc/uvc_queue.c
@@ -165,12 +165,18 @@ static int uvc_start_streaming(struct vb2_queue *vq, unsigned int count)
lockdep_assert_irqs_enabled();
+ ret = uvc_pm_get(stream->dev);
+ if (ret)
+ return ret;
+
queue->buf_used = 0;
ret = uvc_video_start_streaming(stream);
if (ret == 0)
return 0;
+ uvc_pm_put(stream->dev);
+
spin_lock_irq(&queue->irqlock);
uvc_queue_return_buffers(queue, UVC_BUF_STATE_QUEUED);
spin_unlock_irq(&queue->irqlock);
@@ -181,11 +187,14 @@ static int uvc_start_streaming(struct vb2_queue *vq, unsigned int count)
static void uvc_stop_streaming(struct vb2_queue *vq)
{
struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
+ struct uvc_streaming *stream = uvc_queue_to_stream(queue);
lockdep_assert_irqs_enabled();
- if (vq->type != V4L2_BUF_TYPE_META_CAPTURE)
+ if (vq->type != V4L2_BUF_TYPE_META_CAPTURE) {
+ uvc_pm_put(stream->dev);
uvc_video_stop_streaming(uvc_queue_to_stream(queue));
+ }
spin_lock_irq(&queue->irqlock);
uvc_queue_return_buffers(queue, UVC_BUF_STATE_ERROR);
diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index 49cc64dd7e2e737f431b9df9df68921d9c543751..100cff47ecc5ffd9941e22fec24756abda1f015e 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -617,9 +617,6 @@ static int uvc_v4l2_release(struct file *file)
uvc_ctrl_cleanup_fh(handle);
- if (handle->is_streaming)
- uvc_pm_put(stream->dev);
-
/* Release the file handle. */
vb2_fop_release(file);
file->private_data = NULL;
@@ -677,50 +674,6 @@ static int uvc_ioctl_try_fmt(struct file *file, void *fh,
return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL);
}
-static int uvc_ioctl_streamon(struct file *file, void *fh,
- enum v4l2_buf_type type)
-{
- struct uvc_fh *handle = fh;
- struct uvc_streaming *stream = handle->stream;
- int ret;
-
- if (handle->is_streaming)
- return 0;
-
- ret = uvc_pm_get(stream->dev);
- if (ret)
- return ret;
-
- ret = vb2_ioctl_streamon(file, fh, type);
- if (ret) {
- uvc_pm_put(stream->dev);
- return ret;
- }
-
- handle->is_streaming = true;
-
- return 0;
-}
-
-static int uvc_ioctl_streamoff(struct file *file, void *fh,
- enum v4l2_buf_type type)
-{
- struct uvc_fh *handle = fh;
- struct uvc_streaming *stream = handle->stream;
- int ret;
-
- ret = vb2_ioctl_streamoff(file, fh, type);
- if (ret)
- return ret;
-
- if (handle->is_streaming) {
- handle->is_streaming = false;
- uvc_pm_put(stream->dev);
- }
-
- return 0;
-}
-
static int uvc_ioctl_enum_input(struct file *file, void *fh,
struct v4l2_input *input)
{
@@ -1321,8 +1274,8 @@ const struct v4l2_ioctl_ops uvc_ioctl_ops = {
.vidioc_expbuf = vb2_ioctl_expbuf,
.vidioc_dqbuf = vb2_ioctl_dqbuf,
.vidioc_create_bufs = vb2_ioctl_create_bufs,
- .vidioc_streamon = uvc_ioctl_streamon,
- .vidioc_streamoff = uvc_ioctl_streamoff,
+ .vidioc_streamon = vb2_ioctl_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
.vidioc_enum_input = uvc_ioctl_enum_input,
.vidioc_g_input = uvc_ioctl_g_input,
.vidioc_s_input = uvc_ioctl_s_input,
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index 3ddbf065a2cbae40ee48cb06f84ca8f0052990c4..f895f690f7cdc1af942d5f3a5f10e9dd1c956a35 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -626,7 +626,6 @@ struct uvc_fh {
struct uvc_video_chain *chain;
struct uvc_streaming *stream;
unsigned int pending_async_ctrls;
- bool is_streaming;
};
/* ------------------------------------------------------------------------
--
2.49.0.1266.g31b7d2e469-goog
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