[PATCH v5 35/49] media: davinci: vpif_capture: use v4l2_fh_open and vb2_fop_release

From: Lad, Prabhakar
Date: Fri May 16 2014 - 09:42:12 EST

From: "Lad, Prabhakar" <prabhakar.csengg@xxxxxxxxx>

this patch adds support to use v4l2_fh_open() and vb2_fop_release,
which allows to drop driver specific struct vpif_fh, as this is handeled
by core. This patch also drops vpif_g/s_priority as this handeled
by core.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@xxxxxxxxx>
---
drivers/media/platform/davinci/vpif_capture.c | 296 ++++---------------------
drivers/media/platform/davinci/vpif_capture.h | 14 --
2 files changed, 48 insertions(+), 262 deletions(-)

diff --git a/drivers/media/platform/davinci/vpif_capture.c b/drivers/media/platform/davinci/vpif_capture.c
index a50e392..6ad9e09 100644
--- a/drivers/media/platform/davinci/vpif_capture.c
+++ b/drivers/media/platform/davinci/vpif_capture.c
@@ -751,98 +751,6 @@ static void vpif_config_addr(struct channel_obj *ch, int muxmode)
}

/**
- * vpif_open : vpif open handler
- * @filep: file ptr
- *
- * It creates object of file handle structure and stores it in private_data
- * member of filepointer
- */
-static int vpif_open(struct file *filep)
-{
- struct video_device *vdev = video_devdata(filep);
- struct common_obj *common;
- struct video_obj *vid_ch;
- struct channel_obj *ch;
- struct vpif_fh *fh;
-
- vpif_dbg(2, debug, "vpif_open\n");
-
- ch = video_get_drvdata(vdev);
-
- vid_ch = &ch->video;
- common = &ch->common[VPIF_VIDEO_INDEX];
-
- /* Allocate memory for the file handle object */
- fh = kzalloc(sizeof(struct vpif_fh), GFP_KERNEL);
- if (NULL == fh) {
- vpif_err("unable to allocate memory for file handle object\n");
- return -ENOMEM;
- }
-
- if (mutex_lock_interruptible(&common->lock)) {
- kfree(fh);
- return -ERESTARTSYS;
- }
- /* store pointer to fh in private_data member of filep */
- filep->private_data = fh;
- fh->channel = ch;
- fh->initialized = 0;
- /* If decoder is not initialized. initialize it */
- if (!ch->initialized) {
- fh->initialized = 1;
- ch->initialized = 1;
- memset(&(ch->vpifparams), 0, sizeof(struct vpif_params));
- }
- /* Increment channel usrs counter */
- ch->usrs++;
- /* Set io_allowed member to false */
- fh->io_allowed[VPIF_VIDEO_INDEX] = 0;
- /* Initialize priority of this instance to default priority */
- fh->prio = V4L2_PRIORITY_UNSET;
- v4l2_prio_open(&ch->prio, &fh->prio);
- mutex_unlock(&common->lock);
- return 0;
-}
-
-/**
- * vpif_release : function to clean up file close
- * @filep: file pointer
- *
- * This function deletes buffer queue, frees the buffers and the vpif file
- * handle
- */
-static int vpif_release(struct file *filep)
-{
- struct vpif_fh *fh = filep->private_data;
- struct channel_obj *ch = fh->channel;
- struct common_obj *common;
-
- vpif_dbg(2, debug, "vpif_release\n");
-
- common = &ch->common[VPIF_VIDEO_INDEX];
-
- mutex_lock(&common->lock);
- /* if this instance is doing IO */
- if (fh->io_allowed[VPIF_VIDEO_INDEX])
- /* Reset io_usrs member of channel object */
- common->io_usrs = 0;
-
- /* Decrement channel usrs counter */
- ch->usrs--;
-
- /* Close the priority */
- v4l2_prio_close(&ch->prio, fh->prio);
-
- if (fh->initialized)
- ch->initialized = 0;
-
- mutex_unlock(&common->lock);
- filep->private_data = NULL;
- kfree(fh);
- return 0;
-}
-
-/**
* vpif_reqbufs() - request buffer handler
* @file: file ptr
* @priv: file handle
@@ -851,25 +759,13 @@ static int vpif_release(struct file *filep)
static int vpif_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *reqbuf)
{
- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
+ struct video_device *vdev = video_devdata(file);
+ struct channel_obj *ch = video_get_drvdata(vdev);
struct common_obj *common;
u8 index = 0;

vpif_dbg(2, debug, "vpif_reqbufs\n");

- /**
- * This file handle has not initialized the channel,
- * It is not allowed to do settings
- */
- if ((VPIF_CHANNEL0_VIDEO == ch->channel_id)
- || (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
- if (!fh->initialized) {
- vpif_dbg(1, debug, "Channel Busy\n");
- return -EBUSY;
- }
- }
-
if (V4L2_BUF_TYPE_VIDEO_CAPTURE != reqbuf->type || !vpif_dev)
return -EINVAL;

@@ -880,8 +776,6 @@ static int vpif_reqbufs(struct file *file, void *priv,
if (0 != common->io_usrs)
return -EBUSY;

- /* Set io allowed member of file handle to TRUE */
- fh->io_allowed[index] = 1;
/* Increment io usrs member of channel object to 1 */
common->io_usrs = 1;
/* Store type of memory requested in channel object */
@@ -900,8 +794,8 @@ static int vpif_reqbufs(struct file *file, void *priv,
static int vpif_querybuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
+ struct video_device *vdev = video_devdata(file);
+ struct channel_obj *ch = video_get_drvdata(vdev);
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];

vpif_dbg(2, debug, "vpif_querybuf\n");
@@ -926,8 +820,8 @@ static int vpif_querybuf(struct file *file, void *priv,
static int vpif_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
{

- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
+ struct video_device *vdev = video_devdata(file);
+ struct channel_obj *ch = video_get_drvdata(vdev);
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
struct v4l2_buffer tbuf = *buf;

@@ -938,11 +832,6 @@ static int vpif_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
return -EINVAL;
}

- if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
- vpif_err("fh io not allowed\n");
- return -EACCES;
- }
-
return vb2_qbuf(&common->buffer_queue, buf);
}

@@ -954,8 +843,8 @@ static int vpif_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
*/
static int vpif_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
{
- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
+ struct video_device *vdev = video_devdata(file);
+ struct channel_obj *ch = video_get_drvdata(vdev);
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];

vpif_dbg(2, debug, "vpif_dqbuf\n");
@@ -973,9 +862,8 @@ static int vpif_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
static int vpif_streamon(struct file *file, void *priv,
enum v4l2_buf_type buftype)
{
-
- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
+ struct video_device *vdev = video_devdata(file);
+ struct channel_obj *ch = video_get_drvdata(vdev);
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
struct channel_obj *oth_ch = vpif_obj.dev[!ch->channel_id];
struct vpif_params *vpif;
@@ -990,12 +878,6 @@ static int vpif_streamon(struct file *file, void *priv,
return -EINVAL;
}

- /* If file handle is not allowed IO, return error */
- if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
- vpif_dbg(1, debug, "io not allowed\n");
- return -EACCES;
- }
-
/* If Streaming is already started, return error */
if (common->started) {
vpif_dbg(1, debug, "channel->started\n");
@@ -1043,8 +925,8 @@ static int vpif_streamoff(struct file *file, void *priv,
enum v4l2_buf_type buftype)
{

- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
+ struct video_device *vdev = video_devdata(file);
+ struct channel_obj *ch = video_get_drvdata(vdev);
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
int ret;

@@ -1055,12 +937,6 @@ static int vpif_streamoff(struct file *file, void *priv,
return -EINVAL;
}

- /* If io is allowed for this file handle, return error */
- if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
- vpif_dbg(1, debug, "io not allowed\n");
- return -EACCES;
- }
-
/* If streaming is not started, return error */
if (!common->started) {
vpif_dbg(1, debug, "channel->started\n");
@@ -1189,8 +1065,8 @@ static int vpif_set_input(
*/
static int vpif_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
{
- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
+ struct video_device *vdev = video_devdata(file);
+ struct channel_obj *ch = video_get_drvdata(vdev);
int ret = 0;

vpif_dbg(2, debug, "vpif_querystd\n");
@@ -1216,8 +1092,8 @@ static int vpif_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
*/
static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
{
- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
+ struct video_device *vdev = video_devdata(file);
+ struct channel_obj *ch = video_get_drvdata(vdev);

vpif_dbg(2, debug, "vpif_g_std\n");

@@ -1233,8 +1109,8 @@ static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
*/
static int vpif_s_std(struct file *file, void *priv, v4l2_std_id std_id)
{
- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
+ struct video_device *vdev = video_devdata(file);
+ struct channel_obj *ch = video_get_drvdata(vdev);
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
int ret = 0;

@@ -1245,20 +1121,6 @@ static int vpif_s_std(struct file *file, void *priv, v4l2_std_id std_id)
return -EBUSY;
}

- if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) ||
- (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
- if (!fh->initialized) {
- vpif_dbg(1, debug, "Channel Busy\n");
- return -EBUSY;
- }
- }
-
- ret = v4l2_prio_check(&ch->prio, fh->prio);
- if (0 != ret)
- return ret;
-
- fh->initialized = 1;
-
/* Call encoder subdevice function to set the standard */
ch->video.stdid = std_id;
memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
@@ -1292,9 +1154,9 @@ static int vpif_enum_input(struct file *file, void *priv,
{

struct vpif_capture_config *config = vpif_dev->platform_data;
+ struct video_device *vdev = video_devdata(file);
+ struct channel_obj *ch = video_get_drvdata(vdev);
struct vpif_capture_chan_config *chan_cfg;
- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;

chan_cfg = &config->chan_config[ch->channel_id];

@@ -1316,8 +1178,8 @@ static int vpif_enum_input(struct file *file, void *priv,
*/
static int vpif_g_input(struct file *file, void *priv, unsigned int *index)
{
- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
+ struct video_device *vdev = video_devdata(file);
+ struct channel_obj *ch = video_get_drvdata(vdev);

*index = ch->input_idx;
return 0;
@@ -1332,11 +1194,10 @@ static int vpif_g_input(struct file *file, void *priv, unsigned int *index)
static int vpif_s_input(struct file *file, void *priv, unsigned int index)
{
struct vpif_capture_config *config = vpif_dev->platform_data;
- struct vpif_capture_chan_config *chan_cfg;
- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
+ struct video_device *vdev = video_devdata(file);
+ struct channel_obj *ch = video_get_drvdata(vdev);
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
- int ret;
+ struct vpif_capture_chan_config *chan_cfg;

chan_cfg = &config->chan_config[ch->channel_id];

@@ -1348,19 +1209,6 @@ static int vpif_s_input(struct file *file, void *priv, unsigned int index)
return -EBUSY;
}

- if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) ||
- (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
- if (!fh->initialized) {
- vpif_dbg(1, debug, "Channel Busy\n");
- return -EBUSY;
- }
- }
-
- ret = v4l2_prio_check(&ch->prio, fh->prio);
- if (0 != ret)
- return ret;
-
- fh->initialized = 1;
return vpif_set_input(config, ch, index);
}

@@ -1373,8 +1221,8 @@ static int vpif_s_input(struct file *file, void *priv, unsigned int index)
static int vpif_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *fmt)
{
- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
+ struct video_device *vdev = video_devdata(file);
+ struct channel_obj *ch = video_get_drvdata(vdev);

if (fmt->index != 0) {
vpif_dbg(1, debug, "Invalid format index\n");
@@ -1403,8 +1251,8 @@ static int vpif_enum_fmt_vid_cap(struct file *file, void *priv,
static int vpif_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *fmt)
{
- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
+ struct video_device *vdev = video_devdata(file);
+ struct channel_obj *ch = video_get_drvdata(vdev);
struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;

return vpif_check_format(ch, pixfmt, 1);
@@ -1420,8 +1268,8 @@ static int vpif_try_fmt_vid_cap(struct file *file, void *priv,
static int vpif_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *fmt)
{
- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
+ struct video_device *vdev = video_devdata(file);
+ struct channel_obj *ch = video_get_drvdata(vdev);
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];

/* Check the validity of the buffer type */
@@ -1442,8 +1290,8 @@ static int vpif_g_fmt_vid_cap(struct file *file, void *priv,
static int vpif_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *fmt)
{
- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
+ struct video_device *vdev = video_devdata(file);
+ struct channel_obj *ch = video_get_drvdata(vdev);
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
struct v4l2_pix_format *pixfmt;
int ret = 0;
@@ -1456,20 +1304,6 @@ static int vpif_s_fmt_vid_cap(struct file *file, void *priv,
return -EBUSY;
}

- if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) ||
- (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
- if (!fh->initialized) {
- vpif_dbg(1, debug, "Channel Busy\n");
- return -EBUSY;
- }
- }
-
- ret = v4l2_prio_check(&ch->prio, fh->prio);
- if (0 != ret)
- return ret;
-
- fh->initialized = 1;
-
pixfmt = &fmt->fmt.pix;
/* Check for valid field format */
ret = vpif_check_format(ch, pixfmt, 0);
@@ -1503,37 +1337,6 @@ static int vpif_querycap(struct file *file, void *priv,
}

/**
- * vpif_g_priority() - get priority handler
- * @file: file ptr
- * @priv: file handle
- * @prio: ptr to v4l2_priority structure
- */
-static int vpif_g_priority(struct file *file, void *priv,
- enum v4l2_priority *prio)
-{
- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
-
- *prio = v4l2_prio_max(&ch->prio);
-
- return 0;
-}
-
-/**
- * vpif_s_priority() - set priority handler
- * @file: file ptr
- * @priv: file handle
- * @prio: ptr to v4l2_priority structure
- */
-static int vpif_s_priority(struct file *file, void *priv, enum v4l2_priority p)
-{
- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
-
- return v4l2_prio_change(&ch->prio, &fh->prio, p);
-}
-
-/**
* vpif_cropcap() - cropcap handler
* @file: file ptr
* @priv: file handle
@@ -1542,8 +1345,8 @@ static int vpif_s_priority(struct file *file, void *priv, enum v4l2_priority p)
static int vpif_cropcap(struct file *file, void *priv,
struct v4l2_cropcap *crop)
{
- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
+ struct video_device *vdev = video_devdata(file);
+ struct channel_obj *ch = video_get_drvdata(vdev);
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];

if (V4L2_BUF_TYPE_VIDEO_CAPTURE != crop->type)
@@ -1567,8 +1370,8 @@ static int
vpif_enum_dv_timings(struct file *file, void *priv,
struct v4l2_enum_dv_timings *timings)
{
- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
+ struct video_device *vdev = video_devdata(file);
+ struct channel_obj *ch = video_get_drvdata(vdev);
int ret;

ret = v4l2_subdev_call(ch->sd, video, enum_dv_timings, timings);
@@ -1587,8 +1390,8 @@ static int
vpif_query_dv_timings(struct file *file, void *priv,
struct v4l2_dv_timings *timings)
{
- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
+ struct video_device *vdev = video_devdata(file);
+ struct channel_obj *ch = video_get_drvdata(vdev);
int ret;

ret = v4l2_subdev_call(ch->sd, video, query_dv_timings, timings);
@@ -1606,8 +1409,8 @@ vpif_query_dv_timings(struct file *file, void *priv,
static int vpif_s_dv_timings(struct file *file, void *priv,
struct v4l2_dv_timings *timings)
{
- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
+ struct video_device *vdev = video_devdata(file);
+ struct channel_obj *ch = video_get_drvdata(vdev);
struct vpif_params *vpifparams = &ch->vpifparams;
struct vpif_channel_config_params *std_info = &vpifparams->std_info;
struct video_obj *vid_ch = &ch->video;
@@ -1694,8 +1497,8 @@ static int vpif_s_dv_timings(struct file *file, void *priv,
static int vpif_g_dv_timings(struct file *file, void *priv,
struct v4l2_dv_timings *timings)
{
- struct vpif_fh *fh = priv;
- struct channel_obj *ch = fh->channel;
+ struct video_device *vdev = video_devdata(file);
+ struct channel_obj *ch = video_get_drvdata(vdev);
struct video_obj *vid_ch = &ch->video;

*timings = vid_ch->dv_timings;
@@ -1721,8 +1524,6 @@ static int vpif_log_status(struct file *filep, void *priv)
/* vpif capture ioctl operations */
static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
.vidioc_querycap = vpif_querycap,
- .vidioc_g_priority = vpif_g_priority,
- .vidioc_s_priority = vpif_s_priority,
.vidioc_enum_fmt_vid_cap = vpif_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = vpif_g_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = vpif_s_fmt_vid_cap,
@@ -1750,8 +1551,8 @@ static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
/* vpif file operations */
static struct v4l2_file_operations vpif_fops = {
.owner = THIS_MODULE,
- .open = vpif_open,
- .release = vpif_release,
+ .open = v4l2_fh_open,
+ .release = vb2_fop_release,
.unlocked_ioctl = video_ioctl2,
.mmap = vb2_fop_mmap,
.poll = vb2_fop_poll
@@ -1851,10 +1652,6 @@ static int vpif_probe_complete(void)
common = &(ch->common[VPIF_VIDEO_INDEX]);
spin_lock_init(&common->irqlock);
mutex_init(&common->lock);
- ch->video_dev->lock = &common->lock;
- /* Initialize prio member of channel object */
- v4l2_prio_init(&ch->prio);
- video_set_drvdata(ch->video_dev, ch);

/* select input 0 */
err = vpif_set_input(vpif_obj.config, ch, 0);
@@ -1890,6 +1687,9 @@ static int vpif_probe_complete(void)

vdev = ch->video_dev;
vdev->queue = q;
+ vdev->lock = &common->lock;
+ set_bit(V4L2_FL_USE_FH_PRIO, &vdev->flags);
+ video_set_drvdata(ch->video_dev, ch);
err = video_register_device(vdev,
VFL_TYPE_GRABBER, (j ? 1 : 0));
if (err)
diff --git a/drivers/media/platform/davinci/vpif_capture.h b/drivers/media/platform/davinci/vpif_capture.h
index 5a29d9a..f600819 100644
--- a/drivers/media/platform/davinci/vpif_capture.h
+++ b/drivers/media/platform/davinci/vpif_capture.h
@@ -104,8 +104,6 @@ struct common_obj {
struct channel_obj {
/* Identifies video device for this channel */
struct video_device *video_dev;
- /* Used to keep track of state of the priority */
- struct v4l2_prio_state prio;
/* number of open instances of the channel */
int usrs;
/* Indicates id of the field which is being displayed */
@@ -126,18 +124,6 @@ struct channel_obj {
struct video_obj video;
};

-/* File handle structure */
-struct vpif_fh {
- /* pointer to channel object for opened device */
- struct channel_obj *channel;
- /* Indicates whether this file handle is doing IO */
- u8 io_allowed[VPIF_NUMBER_OF_OBJECTS];
- /* Used to keep track priority of this instance */
- enum v4l2_priority prio;
- /* Used to indicate channel is initialize or not */
- u8 initialized;
-};
-
struct vpif_device {
struct v4l2_device v4l2_dev;
struct channel_obj *dev[VPIF_CAPTURE_NUM_CHANNELS];
--
1.7.9.5

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