diff options
Diffstat (limited to 'drivers/media/pci/saa7164/saa7164-vbi.c')
| -rw-r--r-- | drivers/media/pci/saa7164/saa7164-vbi.c | 768 |
1 files changed, 768 insertions, 0 deletions
diff --git a/drivers/media/pci/saa7164/saa7164-vbi.c b/drivers/media/pci/saa7164/saa7164-vbi.c new file mode 100644 index 000000000..a6738baab --- /dev/null +++ b/drivers/media/pci/saa7164/saa7164-vbi.c @@ -0,0 +1,768 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Driver for the NXP SAA7164 PCIe bridge + * + * Copyright (c) 2010-2015 Steven Toth <stoth@kernellabs.com> + */ + +#include "saa7164.h" + +/* Take the encoder configuration from the port struct and + * flush it to the hardware. + */ +static void saa7164_vbi_configure(struct saa7164_port *port) +{ + struct saa7164_dev *dev = port->dev; + dprintk(DBGLVL_VBI, "%s()\n", __func__); + + port->vbi_params.width = port->enc_port->width; + port->vbi_params.height = port->enc_port->height; + port->vbi_params.is_50hz = + (port->enc_port->encodernorm.id & V4L2_STD_625_50) != 0; + + /* Set up the DIF (enable it) for analog mode by default */ + saa7164_api_initialize_dif(port); + dprintk(DBGLVL_VBI, "%s() ends\n", __func__); +} + +static int saa7164_vbi_buffers_dealloc(struct saa7164_port *port) +{ + struct list_head *c, *n, *p, *q, *l, *v; + struct saa7164_dev *dev = port->dev; + struct saa7164_buffer *buf; + struct saa7164_user_buffer *ubuf; + + /* Remove any allocated buffers */ + mutex_lock(&port->dmaqueue_lock); + + dprintk(DBGLVL_VBI, "%s(port=%d) dmaqueue\n", __func__, port->nr); + list_for_each_safe(c, n, &port->dmaqueue.list) { + buf = list_entry(c, struct saa7164_buffer, list); + list_del(c); + saa7164_buffer_dealloc(buf); + } + + dprintk(DBGLVL_VBI, "%s(port=%d) used\n", __func__, port->nr); + list_for_each_safe(p, q, &port->list_buf_used.list) { + ubuf = list_entry(p, struct saa7164_user_buffer, list); + list_del(p); + saa7164_buffer_dealloc_user(ubuf); + } + + dprintk(DBGLVL_VBI, "%s(port=%d) free\n", __func__, port->nr); + list_for_each_safe(l, v, &port->list_buf_free.list) { + ubuf = list_entry(l, struct saa7164_user_buffer, list); + list_del(l); + saa7164_buffer_dealloc_user(ubuf); + } + + mutex_unlock(&port->dmaqueue_lock); + dprintk(DBGLVL_VBI, "%s(port=%d) done\n", __func__, port->nr); + + return 0; +} + +/* Dynamic buffer switch at vbi start time */ +static int saa7164_vbi_buffers_alloc(struct saa7164_port *port) +{ + struct saa7164_dev *dev = port->dev; + struct saa7164_buffer *buf; + struct saa7164_user_buffer *ubuf; + struct tmHWStreamParameters *params = &port->hw_streamingparams; + int result = -ENODEV, i; + int len = 0; + + dprintk(DBGLVL_VBI, "%s()\n", __func__); + + /* TODO: NTSC SPECIFIC */ + /* Init and establish defaults */ + params->samplesperline = 1440; + params->numberoflines = 12; + params->numberoflines = 18; + params->pitch = 1600; + params->pitch = 1440; + params->numpagetables = 2 + + ((params->numberoflines * params->pitch) / PAGE_SIZE); + params->bitspersample = 8; + params->linethreshold = 0; + params->pagetablelistvirt = NULL; + params->pagetablelistphys = NULL; + params->numpagetableentries = port->hwcfg.buffercount; + + /* Allocate the PCI resources, buffers (hard) */ + for (i = 0; i < port->hwcfg.buffercount; i++) { + buf = saa7164_buffer_alloc(port, + params->numberoflines * + params->pitch); + + if (!buf) { + printk(KERN_ERR "%s() failed (errno = %d), unable to allocate buffer\n", + __func__, result); + result = -ENOMEM; + goto failed; + } else { + + mutex_lock(&port->dmaqueue_lock); + list_add_tail(&buf->list, &port->dmaqueue.list); + mutex_unlock(&port->dmaqueue_lock); + + } + } + + /* Allocate some kernel buffers for copying + * to userpsace. + */ + len = params->numberoflines * params->pitch; + + if (vbi_buffers < 16) + vbi_buffers = 16; + if (vbi_buffers > 512) + vbi_buffers = 512; + + for (i = 0; i < vbi_buffers; i++) { + + ubuf = saa7164_buffer_alloc_user(dev, len); + if (ubuf) { + mutex_lock(&port->dmaqueue_lock); + list_add_tail(&ubuf->list, &port->list_buf_free.list); + mutex_unlock(&port->dmaqueue_lock); + } + + } + + result = 0; + +failed: + return result; +} + + +static int saa7164_vbi_initialize(struct saa7164_port *port) +{ + saa7164_vbi_configure(port); + return 0; +} + +/* -- V4L2 --------------------------------------------------------- */ +static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id) +{ + struct saa7164_vbi_fh *fh = file->private_data; + + return saa7164_s_std(fh->port->enc_port, id); +} + +static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id) +{ + struct saa7164_encoder_fh *fh = file->private_data; + + return saa7164_g_std(fh->port->enc_port, id); +} + +static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) +{ + struct saa7164_vbi_fh *fh = file->private_data; + + return saa7164_g_input(fh->port->enc_port, i); +} + +static int vidioc_s_input(struct file *file, void *priv, unsigned int i) +{ + struct saa7164_vbi_fh *fh = file->private_data; + + return saa7164_s_input(fh->port->enc_port, i); +} + +static int vidioc_g_frequency(struct file *file, void *priv, + struct v4l2_frequency *f) +{ + struct saa7164_vbi_fh *fh = file->private_data; + + return saa7164_g_frequency(fh->port->enc_port, f); +} + +static int vidioc_s_frequency(struct file *file, void *priv, + const struct v4l2_frequency *f) +{ + struct saa7164_vbi_fh *fh = file->private_data; + int ret = saa7164_s_frequency(fh->port->enc_port, f); + + if (ret == 0) + saa7164_vbi_initialize(fh->port); + return ret; +} + +static int vidioc_querycap(struct file *file, void *priv, + struct v4l2_capability *cap) +{ + struct saa7164_vbi_fh *fh = file->private_data; + struct saa7164_port *port = fh->port; + struct saa7164_dev *dev = port->dev; + + strscpy(cap->driver, dev->name, sizeof(cap->driver)); + strscpy(cap->card, saa7164_boards[dev->board].name, + sizeof(cap->card)); + cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | + V4L2_CAP_TUNER | V4L2_CAP_VBI_CAPTURE | + V4L2_CAP_DEVICE_CAPS; + return 0; +} + +static int saa7164_vbi_stop_port(struct saa7164_port *port) +{ + struct saa7164_dev *dev = port->dev; + int ret; + + ret = saa7164_api_transition_port(port, SAA_DMASTATE_STOP); + if ((ret != SAA_OK) && (ret != SAA_ERR_ALREADY_STOPPED)) { + printk(KERN_ERR "%s() stop transition failed, ret = 0x%x\n", + __func__, ret); + ret = -EIO; + } else { + dprintk(DBGLVL_VBI, "%s() Stopped\n", __func__); + ret = 0; + } + + return ret; +} + +static int saa7164_vbi_acquire_port(struct saa7164_port *port) +{ + struct saa7164_dev *dev = port->dev; + int ret; + + ret = saa7164_api_transition_port(port, SAA_DMASTATE_ACQUIRE); + if ((ret != SAA_OK) && (ret != SAA_ERR_ALREADY_STOPPED)) { + printk(KERN_ERR "%s() acquire transition failed, ret = 0x%x\n", + __func__, ret); + ret = -EIO; + } else { + dprintk(DBGLVL_VBI, "%s() Acquired\n", __func__); + ret = 0; + } + + return ret; +} + +static int saa7164_vbi_pause_port(struct saa7164_port *port) +{ + struct saa7164_dev *dev = port->dev; + int ret; + + ret = saa7164_api_transition_port(port, SAA_DMASTATE_PAUSE); + if ((ret != SAA_OK) && (ret != SAA_ERR_ALREADY_STOPPED)) { + printk(KERN_ERR "%s() pause transition failed, ret = 0x%x\n", + __func__, ret); + ret = -EIO; + } else { + dprintk(DBGLVL_VBI, "%s() Paused\n", __func__); + ret = 0; + } + + return ret; +} + +/* Firmware is very windows centric, meaning you have to transition + * the part through AVStream / KS Windows stages, forwards or backwards. + * States are: stopped, acquired (h/w), paused, started. + * We have to leave here will all of the soft buffers on the free list, + * else the cfg_post() func won't have soft buffers to correctly configure. + */ +static int saa7164_vbi_stop_streaming(struct saa7164_port *port) +{ + struct saa7164_dev *dev = port->dev; + struct saa7164_buffer *buf; + struct saa7164_user_buffer *ubuf; + struct list_head *c, *n; + int ret; + + dprintk(DBGLVL_VBI, "%s(port=%d)\n", __func__, port->nr); + + ret = saa7164_vbi_pause_port(port); + ret = saa7164_vbi_acquire_port(port); + ret = saa7164_vbi_stop_port(port); + + dprintk(DBGLVL_VBI, "%s(port=%d) Hardware stopped\n", __func__, + port->nr); + + /* Reset the state of any allocated buffer resources */ + mutex_lock(&port->dmaqueue_lock); + + /* Reset the hard and soft buffer state */ + list_for_each_safe(c, n, &port->dmaqueue.list) { + buf = list_entry(c, struct saa7164_buffer, list); + buf->flags = SAA7164_BUFFER_FREE; + buf->pos = 0; + } + + list_for_each_safe(c, n, &port->list_buf_used.list) { + ubuf = list_entry(c, struct saa7164_user_buffer, list); + ubuf->pos = 0; + list_move_tail(&ubuf->list, &port->list_buf_free.list); + } + + mutex_unlock(&port->dmaqueue_lock); + + /* Free any allocated resources */ + saa7164_vbi_buffers_dealloc(port); + + dprintk(DBGLVL_VBI, "%s(port=%d) Released\n", __func__, port->nr); + + return ret; +} + +static int saa7164_vbi_start_streaming(struct saa7164_port *port) +{ + struct saa7164_dev *dev = port->dev; + int result, ret = 0; + + dprintk(DBGLVL_VBI, "%s(port=%d)\n", __func__, port->nr); + + port->done_first_interrupt = 0; + + /* allocate all of the PCIe DMA buffer resources on the fly, + * allowing switching between TS and PS payloads without + * requiring a complete driver reload. + */ + saa7164_vbi_buffers_alloc(port); + + /* Configure the encoder with any cache values */ +#if 0 + saa7164_api_set_encoder(port); + saa7164_api_get_encoder(port); +#endif + + /* Place the empty buffers on the hardware */ + saa7164_buffer_cfg_port(port); + + /* Negotiate format */ + if (saa7164_api_set_vbi_format(port) != SAA_OK) { + printk(KERN_ERR "%s() No supported VBI format\n", __func__); + ret = -EIO; + goto out; + } + + /* Acquire the hardware */ + result = saa7164_api_transition_port(port, SAA_DMASTATE_ACQUIRE); + if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) { + printk(KERN_ERR "%s() acquire transition failed, res = 0x%x\n", + __func__, result); + + ret = -EIO; + goto out; + } else + dprintk(DBGLVL_VBI, "%s() Acquired\n", __func__); + + /* Pause the hardware */ + result = saa7164_api_transition_port(port, SAA_DMASTATE_PAUSE); + if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) { + printk(KERN_ERR "%s() pause transition failed, res = 0x%x\n", + __func__, result); + + /* Stop the hardware, regardless */ + result = saa7164_vbi_stop_port(port); + if (result != SAA_OK) { + printk(KERN_ERR "%s() pause/forced stop transition failed, res = 0x%x\n", + __func__, result); + } + + ret = -EIO; + goto out; + } else + dprintk(DBGLVL_VBI, "%s() Paused\n", __func__); + + /* Start the hardware */ + result = saa7164_api_transition_port(port, SAA_DMASTATE_RUN); + if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) { + printk(KERN_ERR "%s() run transition failed, result = 0x%x\n", + __func__, result); + + /* Stop the hardware, regardless */ + result = saa7164_vbi_acquire_port(port); + result = saa7164_vbi_stop_port(port); + if (result != SAA_OK) { + printk(KERN_ERR "%s() run/forced stop transition failed, res = 0x%x\n", + __func__, result); + } + + ret = -EIO; + } else + dprintk(DBGLVL_VBI, "%s() Running\n", __func__); + +out: + return ret; +} + +static int saa7164_vbi_fmt(struct file *file, void *priv, + struct v4l2_format *f) +{ + /* ntsc */ + f->fmt.vbi.samples_per_line = 1440; + f->fmt.vbi.sampling_rate = 27000000; + f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; + f->fmt.vbi.offset = 0; + f->fmt.vbi.flags = 0; + f->fmt.vbi.start[0] = 10; + f->fmt.vbi.count[0] = 18; + f->fmt.vbi.start[1] = 263 + 10 + 1; + f->fmt.vbi.count[1] = 18; + memset(f->fmt.vbi.reserved, 0, sizeof(f->fmt.vbi.reserved)); + return 0; +} + +static int fops_open(struct file *file) +{ + struct saa7164_dev *dev; + struct saa7164_port *port; + struct saa7164_vbi_fh *fh; + + port = (struct saa7164_port *)video_get_drvdata(video_devdata(file)); + if (!port) + return -ENODEV; + + dev = port->dev; + + dprintk(DBGLVL_VBI, "%s()\n", __func__); + + /* allocate + initialize per filehandle data */ + fh = kzalloc(sizeof(*fh), GFP_KERNEL); + if (NULL == fh) + return -ENOMEM; + + fh->port = port; + v4l2_fh_init(&fh->fh, video_devdata(file)); + v4l2_fh_add(&fh->fh); + file->private_data = fh; + + return 0; +} + +static int fops_release(struct file *file) +{ + struct saa7164_vbi_fh *fh = file->private_data; + struct saa7164_port *port = fh->port; + struct saa7164_dev *dev = port->dev; + + dprintk(DBGLVL_VBI, "%s()\n", __func__); + + /* Shut device down on last close */ + if (atomic_cmpxchg(&fh->v4l_reading, 1, 0) == 1) { + if (atomic_dec_return(&port->v4l_reader_count) == 0) { + /* stop vbi capture then cancel buffers */ + saa7164_vbi_stop_streaming(port); + } + } + + v4l2_fh_del(&fh->fh); + v4l2_fh_exit(&fh->fh); + kfree(fh); + + return 0; +} + +static struct +saa7164_user_buffer *saa7164_vbi_next_buf(struct saa7164_port *port) +{ + struct saa7164_user_buffer *ubuf = NULL; + struct saa7164_dev *dev = port->dev; + u32 crc; + + mutex_lock(&port->dmaqueue_lock); + if (!list_empty(&port->list_buf_used.list)) { + ubuf = list_first_entry(&port->list_buf_used.list, + struct saa7164_user_buffer, list); + + if (crc_checking) { + crc = crc32(0, ubuf->data, ubuf->actual_size); + if (crc != ubuf->crc) { + printk(KERN_ERR "%s() ubuf %p crc became invalid, was 0x%x became 0x%x\n", + __func__, + ubuf, ubuf->crc, crc); + } + } + + } + mutex_unlock(&port->dmaqueue_lock); + + dprintk(DBGLVL_VBI, "%s() returns %p\n", __func__, ubuf); + + return ubuf; +} + +static ssize_t fops_read(struct file *file, char __user *buffer, + size_t count, loff_t *pos) +{ + struct saa7164_vbi_fh *fh = file->private_data; + struct saa7164_port *port = fh->port; + struct saa7164_user_buffer *ubuf = NULL; + struct saa7164_dev *dev = port->dev; + int ret = 0; + int rem, cnt; + u8 *p; + + port->last_read_msecs_diff = port->last_read_msecs; + port->last_read_msecs = jiffies_to_msecs(jiffies); + port->last_read_msecs_diff = port->last_read_msecs - + port->last_read_msecs_diff; + + saa7164_histogram_update(&port->read_interval, + port->last_read_msecs_diff); + + if (*pos) { + printk(KERN_ERR "%s() ESPIPE\n", __func__); + return -ESPIPE; + } + + if (atomic_cmpxchg(&fh->v4l_reading, 0, 1) == 0) { + if (atomic_inc_return(&port->v4l_reader_count) == 1) { + + if (saa7164_vbi_initialize(port) < 0) { + printk(KERN_ERR "%s() EINVAL\n", __func__); + return -EINVAL; + } + + saa7164_vbi_start_streaming(port); + msleep(200); + } + } + + /* blocking wait for buffer */ + if ((file->f_flags & O_NONBLOCK) == 0) { + if (wait_event_interruptible(port->wait_read, + saa7164_vbi_next_buf(port))) { + printk(KERN_ERR "%s() ERESTARTSYS\n", __func__); + return -ERESTARTSYS; + } + } + + /* Pull the first buffer from the used list */ + ubuf = saa7164_vbi_next_buf(port); + + while ((count > 0) && ubuf) { + + /* set remaining bytes to copy */ + rem = ubuf->actual_size - ubuf->pos; + cnt = rem > count ? count : rem; + + p = ubuf->data + ubuf->pos; + + dprintk(DBGLVL_VBI, + "%s() count=%d cnt=%d rem=%d buf=%p buf->pos=%d\n", + __func__, (int)count, cnt, rem, ubuf, ubuf->pos); + + if (copy_to_user(buffer, p, cnt)) { + printk(KERN_ERR "%s() copy_to_user failed\n", __func__); + if (!ret) { + printk(KERN_ERR "%s() EFAULT\n", __func__); + ret = -EFAULT; + } + goto err; + } + + ubuf->pos += cnt; + count -= cnt; + buffer += cnt; + ret += cnt; + + if (ubuf->pos > ubuf->actual_size) + printk(KERN_ERR "read() pos > actual, huh?\n"); + + if (ubuf->pos == ubuf->actual_size) { + + /* finished with current buffer, take next buffer */ + + /* Requeue the buffer on the free list */ + ubuf->pos = 0; + + mutex_lock(&port->dmaqueue_lock); + list_move_tail(&ubuf->list, &port->list_buf_free.list); + mutex_unlock(&port->dmaqueue_lock); + + /* Dequeue next */ + if ((file->f_flags & O_NONBLOCK) == 0) { + if (wait_event_interruptible(port->wait_read, + saa7164_vbi_next_buf(port))) { + break; + } + } + ubuf = saa7164_vbi_next_buf(port); + } + } +err: + if (!ret && !ubuf) { + printk(KERN_ERR "%s() EAGAIN\n", __func__); + ret = -EAGAIN; + } + + return ret; +} + +static __poll_t fops_poll(struct file *file, poll_table *wait) +{ + struct saa7164_vbi_fh *fh = (struct saa7164_vbi_fh *)file->private_data; + struct saa7164_port *port = fh->port; + __poll_t mask = 0; + + port->last_poll_msecs_diff = port->last_poll_msecs; + port->last_poll_msecs = jiffies_to_msecs(jiffies); + port->last_poll_msecs_diff = port->last_poll_msecs - + port->last_poll_msecs_diff; + + saa7164_histogram_update(&port->poll_interval, + port->last_poll_msecs_diff); + + if (!video_is_registered(port->v4l_device)) + return EPOLLERR; + + if (atomic_cmpxchg(&fh->v4l_reading, 0, 1) == 0) { + if (atomic_inc_return(&port->v4l_reader_count) == 1) { + if (saa7164_vbi_initialize(port) < 0) + return EPOLLERR; + saa7164_vbi_start_streaming(port); + msleep(200); + } + } + + /* blocking wait for buffer */ + if ((file->f_flags & O_NONBLOCK) == 0) { + if (wait_event_interruptible(port->wait_read, + saa7164_vbi_next_buf(port))) { + return EPOLLERR; + } + } + + /* Pull the first buffer from the used list */ + if (!list_empty(&port->list_buf_used.list)) + mask |= EPOLLIN | EPOLLRDNORM; + + return mask; +} +static const struct v4l2_file_operations vbi_fops = { + .owner = THIS_MODULE, + .open = fops_open, + .release = fops_release, + .read = fops_read, + .poll = fops_poll, + .unlocked_ioctl = video_ioctl2, +}; + +static const struct v4l2_ioctl_ops vbi_ioctl_ops = { + .vidioc_s_std = vidioc_s_std, + .vidioc_g_std = vidioc_g_std, + .vidioc_enum_input = saa7164_enum_input, + .vidioc_g_input = vidioc_g_input, + .vidioc_s_input = vidioc_s_input, + .vidioc_g_tuner = saa7164_g_tuner, + .vidioc_s_tuner = saa7164_s_tuner, + .vidioc_g_frequency = vidioc_g_frequency, + .vidioc_s_frequency = vidioc_s_frequency, + .vidioc_querycap = vidioc_querycap, + .vidioc_g_fmt_vbi_cap = saa7164_vbi_fmt, + .vidioc_try_fmt_vbi_cap = saa7164_vbi_fmt, + .vidioc_s_fmt_vbi_cap = saa7164_vbi_fmt, +}; + +static struct video_device saa7164_vbi_template = { + .name = "saa7164", + .fops = &vbi_fops, + .ioctl_ops = &vbi_ioctl_ops, + .minor = -1, + .tvnorms = SAA7164_NORMS, + .device_caps = V4L2_CAP_VBI_CAPTURE | V4L2_CAP_READWRITE | + V4L2_CAP_TUNER, +}; + +static struct video_device *saa7164_vbi_alloc( + struct saa7164_port *port, + struct pci_dev *pci, + struct video_device *template, + char *type) +{ + struct video_device *vfd; + struct saa7164_dev *dev = port->dev; + + dprintk(DBGLVL_VBI, "%s()\n", __func__); + + vfd = video_device_alloc(); + if (NULL == vfd) + return NULL; + + *vfd = *template; + snprintf(vfd->name, sizeof(vfd->name), "%s %s (%s)", dev->name, + type, saa7164_boards[dev->board].name); + + vfd->v4l2_dev = &dev->v4l2_dev; + vfd->release = video_device_release; + return vfd; +} + +int saa7164_vbi_register(struct saa7164_port *port) +{ + struct saa7164_dev *dev = port->dev; + int result = -ENODEV; + + dprintk(DBGLVL_VBI, "%s()\n", __func__); + + BUG_ON(port->type != SAA7164_MPEG_VBI); + + /* Sanity check that the PCI configuration space is active */ + if (port->hwcfg.BARLocation == 0) { + printk(KERN_ERR "%s() failed (errno = %d), NO PCI configuration\n", + __func__, result); + result = -ENOMEM; + goto failed; + } + + /* Establish VBI defaults here */ + + /* Allocate and register the video device node */ + port->v4l_device = saa7164_vbi_alloc(port, + dev->pci, &saa7164_vbi_template, "vbi"); + + if (!port->v4l_device) { + printk(KERN_INFO "%s: can't allocate vbi device\n", + dev->name); + result = -ENOMEM; + goto failed; + } + + port->enc_port = &dev->ports[port->nr - 2]; + video_set_drvdata(port->v4l_device, port); + result = video_register_device(port->v4l_device, + VFL_TYPE_VBI, -1); + if (result < 0) { + printk(KERN_INFO "%s: can't register vbi device\n", + dev->name); + /* TODO: We're going to leak here if we don't dealloc + The buffers above. The unreg function can't deal wit it. + */ + goto failed; + } + + printk(KERN_INFO "%s: registered device vbi%d [vbi]\n", + dev->name, port->v4l_device->num); + + /* Configure the hardware defaults */ + + result = 0; +failed: + return result; +} + +void saa7164_vbi_unregister(struct saa7164_port *port) +{ + struct saa7164_dev *dev = port->dev; + + dprintk(DBGLVL_VBI, "%s(port=%d)\n", __func__, port->nr); + + BUG_ON(port->type != SAA7164_MPEG_VBI); + + if (port->v4l_device) { + if (port->v4l_device->minor != -1) + video_unregister_device(port->v4l_device); + else + video_device_release(port->v4l_device); + + port->v4l_device = NULL; + } + +} |