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Subject[PATCH v4 07/17] media: blackfin: bfin_capture: use v4l2_fh_open and vb2_fop_release
Date
From: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>

this patch adds support to use v4l2_fh_open() and vb2_fop_release,
which allows to drop driver specific struct bcap_fh, as this is handled
by core.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Acked-by: Scott Jiang <scott.jiang.linux@gmail.com>
Tested-by: Scott Jiang <scott.jiang.linux@gmail.com>
---
drivers/media/platform/blackfin/bfin_capture.c | 79 +-------------------------
1 file changed, 2 insertions(+), 77 deletions(-)

diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
index 84827d2..01e778d 100644
--- a/drivers/media/platform/blackfin/bfin_capture.c
+++ b/drivers/media/platform/blackfin/bfin_capture.c
@@ -105,12 +105,6 @@ struct bcap_device {
bool stop;
};

-struct bcap_fh {
- struct v4l2_fh fh;
- /* indicates whether this file handle is doing IO */
- bool io_allowed;
-};
-
static const struct bcap_format bcap_formats[] = {
{
.desc = "YCbCr 4:2:2 Interleaved UYVY",
@@ -200,50 +194,6 @@ static void bcap_free_sensor_formats(struct bcap_device *bcap_dev)
bcap_dev->sensor_formats = NULL;
}

-static int bcap_open(struct file *file)
-{
- struct bcap_device *bcap_dev = video_drvdata(file);
- struct video_device *vfd = bcap_dev->video_dev;
- struct bcap_fh *bcap_fh;
-
- if (!bcap_dev->sd) {
- v4l2_err(&bcap_dev->v4l2_dev, "No sub device registered\n");
- return -ENODEV;
- }
-
- bcap_fh = kzalloc(sizeof(*bcap_fh), GFP_KERNEL);
- if (!bcap_fh) {
- v4l2_err(&bcap_dev->v4l2_dev,
- "unable to allocate memory for file handle object\n");
- return -ENOMEM;
- }
-
- v4l2_fh_init(&bcap_fh->fh, vfd);
-
- /* store pointer to v4l2_fh in private_data member of file */
- file->private_data = &bcap_fh->fh;
- v4l2_fh_add(&bcap_fh->fh);
- bcap_fh->io_allowed = false;
- return 0;
-}
-
-static int bcap_release(struct file *file)
-{
- struct bcap_device *bcap_dev = video_drvdata(file);
- struct v4l2_fh *fh = file->private_data;
- struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
-
- /* if this instance is doing IO */
- if (bcap_fh->io_allowed)
- vb2_queue_release(&bcap_dev->buffer_queue);
-
- file->private_data = NULL;
- v4l2_fh_del(&bcap_fh->fh);
- v4l2_fh_exit(&bcap_fh->fh);
- kfree(bcap_fh);
- return 0;
-}
-
#ifndef CONFIG_MMU
static unsigned long bcap_get_unmapped_area(struct file *file,
unsigned long addr,
@@ -436,13 +386,6 @@ static int bcap_reqbufs(struct file *file, void *priv,
{
struct bcap_device *bcap_dev = video_drvdata(file);
struct vb2_queue *vq = &bcap_dev->buffer_queue;
- struct v4l2_fh *fh = file->private_data;
- struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
-
- if (vb2_is_busy(vq))
- return -EBUSY;
-
- bcap_fh->io_allowed = true;

return vb2_reqbufs(vq, req_buf);
}
@@ -459,11 +402,6 @@ static int bcap_qbuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct bcap_device *bcap_dev = video_drvdata(file);
- struct v4l2_fh *fh = file->private_data;
- struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
-
- if (!bcap_fh->io_allowed)
- return -EBUSY;

return vb2_qbuf(&bcap_dev->buffer_queue, buf);
}
@@ -472,11 +410,6 @@ static int bcap_dqbuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct bcap_device *bcap_dev = video_drvdata(file);
- struct v4l2_fh *fh = file->private_data;
- struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
-
- if (!bcap_fh->io_allowed)
- return -EBUSY;

return vb2_dqbuf(&bcap_dev->buffer_queue,
buf, file->f_flags & O_NONBLOCK);
@@ -527,14 +460,10 @@ static int bcap_streamon(struct file *file, void *priv,
enum v4l2_buf_type buf_type)
{
struct bcap_device *bcap_dev = video_drvdata(file);
- struct bcap_fh *fh = file->private_data;
struct ppi_if *ppi = bcap_dev->ppi;
dma_addr_t addr;
int ret;

- if (!fh->io_allowed)
- return -EBUSY;
-
/* call streamon to start streaming in videobuf */
ret = vb2_streamon(&bcap_dev->buffer_queue, buf_type);
if (ret)
@@ -568,10 +497,6 @@ static int bcap_streamoff(struct file *file, void *priv,
enum v4l2_buf_type buf_type)
{
struct bcap_device *bcap_dev = video_drvdata(file);
- struct bcap_fh *fh = file->private_data;
-
- if (!fh->io_allowed)
- return -EBUSY;

return vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
}
@@ -874,8 +799,8 @@ static const struct v4l2_ioctl_ops bcap_ioctl_ops = {

static struct v4l2_file_operations bcap_fops = {
.owner = THIS_MODULE,
- .open = bcap_open,
- .release = bcap_release,
+ .open = v4l2_fh_open,
+ .release = vb2_fop_release,
.unlocked_ioctl = video_ioctl2,
.mmap = vb2_fop_mmap,
#ifndef CONFIG_MMU
--
2.1.0


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