diff options
Diffstat (limited to 'drivers/media/pci/solo6x10/solo6x10-v4l2.c')
| -rw-r--r-- | drivers/media/pci/solo6x10/solo6x10-v4l2.c | 719 |
1 files changed, 719 insertions, 0 deletions
diff --git a/drivers/media/pci/solo6x10/solo6x10-v4l2.c b/drivers/media/pci/solo6x10/solo6x10-v4l2.c new file mode 100644 index 000000000..e18cc41fc --- /dev/null +++ b/drivers/media/pci/solo6x10/solo6x10-v4l2.c @@ -0,0 +1,719 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2010-2013 Bluecherry, LLC <https://www.bluecherrydvr.com> + * + * Original author: + * Ben Collins <bcollins@ubuntu.com> + * + * Additional work by: + * John Brooks <john.brooks@bluecherry.net> + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/kthread.h> +#include <linux/freezer.h> + +#include <media/v4l2-ioctl.h> +#include <media/v4l2-common.h> +#include <media/v4l2-event.h> +#include <media/videobuf2-v4l2.h> +#include <media/videobuf2-dma-contig.h> + +#include "solo6x10.h" +#include "solo6x10-tw28.h" + +/* Image size is two fields, SOLO_HW_BPL is one horizontal line in hardware */ +#define SOLO_HW_BPL 2048 +#define solo_vlines(__solo) (__solo->video_vsize * 2) +#define solo_image_size(__solo) (solo_bytesperline(__solo) * \ + solo_vlines(__solo)) +#define solo_bytesperline(__solo) (__solo->video_hsize * 2) + +#define MIN_VID_BUFFERS 2 + +static inline void erase_on(struct solo_dev *solo_dev) +{ + solo_reg_write(solo_dev, SOLO_VO_DISP_ERASE, SOLO_VO_DISP_ERASE_ON); + solo_dev->erasing = 1; + solo_dev->frame_blank = 0; +} + +static inline int erase_off(struct solo_dev *solo_dev) +{ + if (!solo_dev->erasing) + return 0; + + /* First time around, assert erase off */ + if (!solo_dev->frame_blank) + solo_reg_write(solo_dev, SOLO_VO_DISP_ERASE, 0); + /* Keep the erasing flag on for 8 frames minimum */ + if (solo_dev->frame_blank++ >= 8) + solo_dev->erasing = 0; + + return 1; +} + +void solo_video_in_isr(struct solo_dev *solo_dev) +{ + wake_up_interruptible_all(&solo_dev->disp_thread_wait); +} + +static void solo_win_setup(struct solo_dev *solo_dev, u8 ch, + int sx, int sy, int ex, int ey, int scale) +{ + if (ch >= solo_dev->nr_chans) + return; + + /* Here, we just keep window/channel the same */ + solo_reg_write(solo_dev, SOLO_VI_WIN_CTRL0(ch), + SOLO_VI_WIN_CHANNEL(ch) | + SOLO_VI_WIN_SX(sx) | + SOLO_VI_WIN_EX(ex) | + SOLO_VI_WIN_SCALE(scale)); + + solo_reg_write(solo_dev, SOLO_VI_WIN_CTRL1(ch), + SOLO_VI_WIN_SY(sy) | + SOLO_VI_WIN_EY(ey)); +} + +static int solo_v4l2_ch_ext_4up(struct solo_dev *solo_dev, u8 idx, int on) +{ + u8 ch = idx * 4; + + if (ch >= solo_dev->nr_chans) + return -EINVAL; + + if (!on) { + u8 i; + + for (i = ch; i < ch + 4; i++) + solo_win_setup(solo_dev, i, solo_dev->video_hsize, + solo_vlines(solo_dev), + solo_dev->video_hsize, + solo_vlines(solo_dev), 0); + return 0; + } + + /* Row 1 */ + solo_win_setup(solo_dev, ch, 0, 0, solo_dev->video_hsize / 2, + solo_vlines(solo_dev) / 2, 3); + solo_win_setup(solo_dev, ch + 1, solo_dev->video_hsize / 2, 0, + solo_dev->video_hsize, solo_vlines(solo_dev) / 2, 3); + /* Row 2 */ + solo_win_setup(solo_dev, ch + 2, 0, solo_vlines(solo_dev) / 2, + solo_dev->video_hsize / 2, solo_vlines(solo_dev), 3); + solo_win_setup(solo_dev, ch + 3, solo_dev->video_hsize / 2, + solo_vlines(solo_dev) / 2, solo_dev->video_hsize, + solo_vlines(solo_dev), 3); + + return 0; +} + +static int solo_v4l2_ch_ext_16up(struct solo_dev *solo_dev, int on) +{ + int sy, ysize, hsize, i; + + if (!on) { + for (i = 0; i < 16; i++) + solo_win_setup(solo_dev, i, solo_dev->video_hsize, + solo_vlines(solo_dev), + solo_dev->video_hsize, + solo_vlines(solo_dev), 0); + return 0; + } + + ysize = solo_vlines(solo_dev) / 4; + hsize = solo_dev->video_hsize / 4; + + for (sy = 0, i = 0; i < 4; i++, sy += ysize) { + solo_win_setup(solo_dev, i * 4, 0, sy, hsize, + sy + ysize, 5); + solo_win_setup(solo_dev, (i * 4) + 1, hsize, sy, + hsize * 2, sy + ysize, 5); + solo_win_setup(solo_dev, (i * 4) + 2, hsize * 2, sy, + hsize * 3, sy + ysize, 5); + solo_win_setup(solo_dev, (i * 4) + 3, hsize * 3, sy, + solo_dev->video_hsize, sy + ysize, 5); + } + + return 0; +} + +static int solo_v4l2_ch(struct solo_dev *solo_dev, u8 ch, int on) +{ + u8 ext_ch; + + if (ch < solo_dev->nr_chans) { + solo_win_setup(solo_dev, ch, on ? 0 : solo_dev->video_hsize, + on ? 0 : solo_vlines(solo_dev), + solo_dev->video_hsize, solo_vlines(solo_dev), + on ? 1 : 0); + return 0; + } + + if (ch >= solo_dev->nr_chans + solo_dev->nr_ext) + return -EINVAL; + + ext_ch = ch - solo_dev->nr_chans; + + /* 4up's first */ + if (ext_ch < 4) + return solo_v4l2_ch_ext_4up(solo_dev, ext_ch, on); + + /* Remaining case is 16up for 16-port */ + return solo_v4l2_ch_ext_16up(solo_dev, on); +} + +static int solo_v4l2_set_ch(struct solo_dev *solo_dev, u8 ch) +{ + if (ch >= solo_dev->nr_chans + solo_dev->nr_ext) + return -EINVAL; + + erase_on(solo_dev); + + solo_v4l2_ch(solo_dev, solo_dev->cur_disp_ch, 0); + solo_v4l2_ch(solo_dev, ch, 1); + + solo_dev->cur_disp_ch = ch; + + return 0; +} + +static void solo_fillbuf(struct solo_dev *solo_dev, + struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + dma_addr_t addr; + unsigned int fdma_addr; + int error = -1; + int i; + + addr = vb2_dma_contig_plane_dma_addr(vb, 0); + if (!addr) + goto finish_buf; + + if (erase_off(solo_dev)) { + void *p = vb2_plane_vaddr(vb, 0); + int image_size = solo_image_size(solo_dev); + + for (i = 0; i < image_size; i += 2) { + ((u8 *)p)[i] = 0x80; + ((u8 *)p)[i + 1] = 0x00; + } + error = 0; + } else { + fdma_addr = SOLO_DISP_EXT_ADDR + (solo_dev->old_write * + (SOLO_HW_BPL * solo_vlines(solo_dev))); + + error = solo_p2m_dma_t(solo_dev, 0, addr, fdma_addr, + solo_bytesperline(solo_dev), + solo_vlines(solo_dev), SOLO_HW_BPL); + } + +finish_buf: + if (!error) { + vb2_set_plane_payload(vb, 0, + solo_vlines(solo_dev) * solo_bytesperline(solo_dev)); + vbuf->sequence = solo_dev->sequence++; + vb->timestamp = ktime_get_ns(); + } + + vb2_buffer_done(vb, error ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); +} + +static void solo_thread_try(struct solo_dev *solo_dev) +{ + struct solo_vb2_buf *vb; + + /* Only "break" from this loop if slock is held, otherwise + * just return. */ + for (;;) { + unsigned int cur_write; + + cur_write = SOLO_VI_STATUS0_PAGE( + solo_reg_read(solo_dev, SOLO_VI_STATUS0)); + if (cur_write == solo_dev->old_write) + return; + + spin_lock(&solo_dev->slock); + + if (list_empty(&solo_dev->vidq_active)) + break; + + vb = list_first_entry(&solo_dev->vidq_active, struct solo_vb2_buf, + list); + + solo_dev->old_write = cur_write; + list_del(&vb->list); + + spin_unlock(&solo_dev->slock); + + solo_fillbuf(solo_dev, &vb->vb.vb2_buf); + } + + assert_spin_locked(&solo_dev->slock); + spin_unlock(&solo_dev->slock); +} + +static int solo_thread(void *data) +{ + struct solo_dev *solo_dev = data; + DECLARE_WAITQUEUE(wait, current); + + set_freezable(); + add_wait_queue(&solo_dev->disp_thread_wait, &wait); + + for (;;) { + long timeout = schedule_timeout_interruptible(HZ); + + if (timeout == -ERESTARTSYS || kthread_should_stop()) + break; + solo_thread_try(solo_dev); + try_to_freeze(); + } + + remove_wait_queue(&solo_dev->disp_thread_wait, &wait); + + return 0; +} + +static int solo_start_thread(struct solo_dev *solo_dev) +{ + int ret = 0; + + solo_dev->kthread = kthread_run(solo_thread, solo_dev, SOLO6X10_NAME "_disp"); + + if (IS_ERR(solo_dev->kthread)) { + ret = PTR_ERR(solo_dev->kthread); + solo_dev->kthread = NULL; + return ret; + } + solo_irq_on(solo_dev, SOLO_IRQ_VIDEO_IN); + + return ret; +} + +static void solo_stop_thread(struct solo_dev *solo_dev) +{ + if (!solo_dev->kthread) + return; + + solo_irq_off(solo_dev, SOLO_IRQ_VIDEO_IN); + kthread_stop(solo_dev->kthread); + solo_dev->kthread = NULL; +} + +static int solo_queue_setup(struct vb2_queue *q, + unsigned int *num_buffers, unsigned int *num_planes, + unsigned int sizes[], struct device *alloc_devs[]) +{ + struct solo_dev *solo_dev = vb2_get_drv_priv(q); + + sizes[0] = solo_image_size(solo_dev); + *num_planes = 1; + + if (*num_buffers < MIN_VID_BUFFERS) + *num_buffers = MIN_VID_BUFFERS; + + return 0; +} + +static int solo_start_streaming(struct vb2_queue *q, unsigned int count) +{ + struct solo_dev *solo_dev = vb2_get_drv_priv(q); + + solo_dev->sequence = 0; + return solo_start_thread(solo_dev); +} + +static void solo_stop_streaming(struct vb2_queue *q) +{ + struct solo_dev *solo_dev = vb2_get_drv_priv(q); + + solo_stop_thread(solo_dev); + + spin_lock(&solo_dev->slock); + while (!list_empty(&solo_dev->vidq_active)) { + struct solo_vb2_buf *buf = list_entry( + solo_dev->vidq_active.next, + struct solo_vb2_buf, list); + + list_del(&buf->list); + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); + } + spin_unlock(&solo_dev->slock); + INIT_LIST_HEAD(&solo_dev->vidq_active); +} + +static void solo_buf_queue(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct vb2_queue *vq = vb->vb2_queue; + struct solo_dev *solo_dev = vb2_get_drv_priv(vq); + struct solo_vb2_buf *solo_vb = + container_of(vbuf, struct solo_vb2_buf, vb); + + spin_lock(&solo_dev->slock); + list_add_tail(&solo_vb->list, &solo_dev->vidq_active); + spin_unlock(&solo_dev->slock); + wake_up_interruptible(&solo_dev->disp_thread_wait); +} + +static const struct vb2_ops solo_video_qops = { + .queue_setup = solo_queue_setup, + .buf_queue = solo_buf_queue, + .start_streaming = solo_start_streaming, + .stop_streaming = solo_stop_streaming, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, +}; + +static int solo_querycap(struct file *file, void *priv, + struct v4l2_capability *cap) +{ + strscpy(cap->driver, SOLO6X10_NAME, sizeof(cap->driver)); + strscpy(cap->card, "Softlogic 6x10", sizeof(cap->card)); + return 0; +} + +static int solo_enum_ext_input(struct solo_dev *solo_dev, + struct v4l2_input *input) +{ + int ext = input->index - solo_dev->nr_chans; + unsigned int nup, first; + + if (ext >= solo_dev->nr_ext) + return -EINVAL; + + nup = (ext == 4) ? 16 : 4; + first = (ext & 3) << 2; /* first channel in the n-up */ + snprintf(input->name, sizeof(input->name), + "Multi %d-up (cameras %d-%d)", + nup, first + 1, first + nup); + /* Possible outputs: + * Multi 4-up (cameras 1-4) + * Multi 4-up (cameras 5-8) + * Multi 4-up (cameras 9-12) + * Multi 4-up (cameras 13-16) + * Multi 16-up (cameras 1-16) + */ + return 0; +} + +static int solo_enum_input(struct file *file, void *priv, + struct v4l2_input *input) +{ + struct solo_dev *solo_dev = video_drvdata(file); + + if (input->index >= solo_dev->nr_chans) { + int ret = solo_enum_ext_input(solo_dev, input); + + if (ret < 0) + return ret; + } else { + snprintf(input->name, sizeof(input->name), "Camera %d", + input->index + 1); + + /* We can only check this for normal inputs */ + if (!tw28_get_video_status(solo_dev, input->index)) + input->status = V4L2_IN_ST_NO_SIGNAL; + } + + input->type = V4L2_INPUT_TYPE_CAMERA; + input->std = solo_dev->vfd->tvnorms; + return 0; +} + +static int solo_set_input(struct file *file, void *priv, unsigned int index) +{ + struct solo_dev *solo_dev = video_drvdata(file); + int ret = solo_v4l2_set_ch(solo_dev, index); + + if (!ret) { + while (erase_off(solo_dev)) + /* Do nothing */; + } + + return ret; +} + +static int solo_get_input(struct file *file, void *priv, unsigned int *index) +{ + struct solo_dev *solo_dev = video_drvdata(file); + + *index = solo_dev->cur_disp_ch; + + return 0; +} + +static int solo_enum_fmt_cap(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + if (f->index) + return -EINVAL; + + f->pixelformat = V4L2_PIX_FMT_UYVY; + return 0; +} + +static int solo_try_fmt_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct solo_dev *solo_dev = video_drvdata(file); + struct v4l2_pix_format *pix = &f->fmt.pix; + int image_size = solo_image_size(solo_dev); + + if (pix->pixelformat != V4L2_PIX_FMT_UYVY) + return -EINVAL; + + pix->width = solo_dev->video_hsize; + pix->height = solo_vlines(solo_dev); + pix->sizeimage = image_size; + pix->field = V4L2_FIELD_INTERLACED; + pix->pixelformat = V4L2_PIX_FMT_UYVY; + pix->colorspace = V4L2_COLORSPACE_SMPTE170M; + return 0; +} + +static int solo_set_fmt_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct solo_dev *solo_dev = video_drvdata(file); + + if (vb2_is_busy(&solo_dev->vidq)) + return -EBUSY; + + /* For right now, if it doesn't match our running config, + * then fail */ + return solo_try_fmt_cap(file, priv, f); +} + +static int solo_get_fmt_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct solo_dev *solo_dev = video_drvdata(file); + struct v4l2_pix_format *pix = &f->fmt.pix; + + pix->width = solo_dev->video_hsize; + pix->height = solo_vlines(solo_dev); + pix->pixelformat = V4L2_PIX_FMT_UYVY; + pix->field = V4L2_FIELD_INTERLACED; + pix->sizeimage = solo_image_size(solo_dev); + pix->colorspace = V4L2_COLORSPACE_SMPTE170M; + pix->bytesperline = solo_bytesperline(solo_dev); + + return 0; +} + +static int solo_g_std(struct file *file, void *priv, v4l2_std_id *i) +{ + struct solo_dev *solo_dev = video_drvdata(file); + + if (solo_dev->video_type == SOLO_VO_FMT_TYPE_NTSC) + *i = V4L2_STD_NTSC_M; + else + *i = V4L2_STD_PAL; + return 0; +} + +int solo_set_video_type(struct solo_dev *solo_dev, bool is_50hz) +{ + int i; + + /* Make sure all video nodes are idle */ + if (vb2_is_busy(&solo_dev->vidq)) + return -EBUSY; + for (i = 0; i < solo_dev->nr_chans; i++) + if (vb2_is_busy(&solo_dev->v4l2_enc[i]->vidq)) + return -EBUSY; + solo_dev->video_type = is_50hz ? SOLO_VO_FMT_TYPE_PAL : + SOLO_VO_FMT_TYPE_NTSC; + /* Reconfigure for the new standard */ + solo_disp_init(solo_dev); + solo_enc_init(solo_dev); + solo_tw28_init(solo_dev); + for (i = 0; i < solo_dev->nr_chans; i++) + solo_update_mode(solo_dev->v4l2_enc[i]); + return solo_v4l2_set_ch(solo_dev, solo_dev->cur_disp_ch); +} + +static int solo_s_std(struct file *file, void *priv, v4l2_std_id std) +{ + struct solo_dev *solo_dev = video_drvdata(file); + + return solo_set_video_type(solo_dev, std & V4L2_STD_625_50); +} + +static int solo_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct solo_dev *solo_dev = + container_of(ctrl->handler, struct solo_dev, disp_hdl); + + switch (ctrl->id) { + case V4L2_CID_MOTION_TRACE: + if (ctrl->val) { + solo_reg_write(solo_dev, SOLO_VI_MOTION_BORDER, + SOLO_VI_MOTION_Y_ADD | + SOLO_VI_MOTION_Y_VALUE(0x20) | + SOLO_VI_MOTION_CB_VALUE(0x10) | + SOLO_VI_MOTION_CR_VALUE(0x10)); + solo_reg_write(solo_dev, SOLO_VI_MOTION_BAR, + SOLO_VI_MOTION_CR_ADD | + SOLO_VI_MOTION_Y_VALUE(0x10) | + SOLO_VI_MOTION_CB_VALUE(0x80) | + SOLO_VI_MOTION_CR_VALUE(0x10)); + } else { + solo_reg_write(solo_dev, SOLO_VI_MOTION_BORDER, 0); + solo_reg_write(solo_dev, SOLO_VI_MOTION_BAR, 0); + } + return 0; + default: + break; + } + return -EINVAL; +} + +static const struct v4l2_file_operations solo_v4l2_fops = { + .owner = THIS_MODULE, + .open = v4l2_fh_open, + .release = vb2_fop_release, + .read = vb2_fop_read, + .poll = vb2_fop_poll, + .mmap = vb2_fop_mmap, + .unlocked_ioctl = video_ioctl2, +}; + +static const struct v4l2_ioctl_ops solo_v4l2_ioctl_ops = { + .vidioc_querycap = solo_querycap, + .vidioc_s_std = solo_s_std, + .vidioc_g_std = solo_g_std, + /* Input callbacks */ + .vidioc_enum_input = solo_enum_input, + .vidioc_s_input = solo_set_input, + .vidioc_g_input = solo_get_input, + /* Video capture format callbacks */ + .vidioc_enum_fmt_vid_cap = solo_enum_fmt_cap, + .vidioc_try_fmt_vid_cap = solo_try_fmt_cap, + .vidioc_s_fmt_vid_cap = solo_set_fmt_cap, + .vidioc_g_fmt_vid_cap = solo_get_fmt_cap, + /* Streaming I/O */ + .vidioc_reqbufs = vb2_ioctl_reqbufs, + .vidioc_querybuf = vb2_ioctl_querybuf, + .vidioc_qbuf = vb2_ioctl_qbuf, + .vidioc_dqbuf = vb2_ioctl_dqbuf, + .vidioc_streamon = vb2_ioctl_streamon, + .vidioc_streamoff = vb2_ioctl_streamoff, + /* Logging and events */ + .vidioc_log_status = v4l2_ctrl_log_status, + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +}; + +static const struct video_device solo_v4l2_template = { + .name = SOLO6X10_NAME, + .fops = &solo_v4l2_fops, + .ioctl_ops = &solo_v4l2_ioctl_ops, + .minor = -1, + .release = video_device_release, + .tvnorms = V4L2_STD_NTSC_M | V4L2_STD_PAL, + .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | + V4L2_CAP_STREAMING, +}; + +static const struct v4l2_ctrl_ops solo_ctrl_ops = { + .s_ctrl = solo_s_ctrl, +}; + +static const struct v4l2_ctrl_config solo_motion_trace_ctrl = { + .ops = &solo_ctrl_ops, + .id = V4L2_CID_MOTION_TRACE, + .name = "Motion Detection Trace", + .type = V4L2_CTRL_TYPE_BOOLEAN, + .max = 1, + .step = 1, +}; + +int solo_v4l2_init(struct solo_dev *solo_dev, unsigned nr) +{ + int ret; + int i; + + init_waitqueue_head(&solo_dev->disp_thread_wait); + spin_lock_init(&solo_dev->slock); + mutex_init(&solo_dev->lock); + INIT_LIST_HEAD(&solo_dev->vidq_active); + + solo_dev->vfd = video_device_alloc(); + if (!solo_dev->vfd) + return -ENOMEM; + + *solo_dev->vfd = solo_v4l2_template; + solo_dev->vfd->v4l2_dev = &solo_dev->v4l2_dev; + solo_dev->vfd->queue = &solo_dev->vidq; + solo_dev->vfd->lock = &solo_dev->lock; + v4l2_ctrl_handler_init(&solo_dev->disp_hdl, 1); + v4l2_ctrl_new_custom(&solo_dev->disp_hdl, &solo_motion_trace_ctrl, NULL); + if (solo_dev->disp_hdl.error) { + ret = solo_dev->disp_hdl.error; + goto fail; + } + solo_dev->vfd->ctrl_handler = &solo_dev->disp_hdl; + + video_set_drvdata(solo_dev->vfd, solo_dev); + + solo_dev->vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + solo_dev->vidq.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ; + solo_dev->vidq.ops = &solo_video_qops; + solo_dev->vidq.mem_ops = &vb2_dma_contig_memops; + solo_dev->vidq.drv_priv = solo_dev; + solo_dev->vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + solo_dev->vidq.gfp_flags = __GFP_DMA32 | __GFP_KSWAPD_RECLAIM; + solo_dev->vidq.buf_struct_size = sizeof(struct solo_vb2_buf); + solo_dev->vidq.lock = &solo_dev->lock; + solo_dev->vidq.dev = &solo_dev->pdev->dev; + ret = vb2_queue_init(&solo_dev->vidq); + if (ret < 0) + goto fail; + + /* Cycle all the channels and clear */ + for (i = 0; i < solo_dev->nr_chans; i++) { + solo_v4l2_set_ch(solo_dev, i); + while (erase_off(solo_dev)) + /* Do nothing */; + } + + /* Set the default display channel */ + solo_v4l2_set_ch(solo_dev, 0); + while (erase_off(solo_dev)) + /* Do nothing */; + + ret = video_register_device(solo_dev->vfd, VFL_TYPE_VIDEO, nr); + if (ret < 0) + goto fail; + + snprintf(solo_dev->vfd->name, sizeof(solo_dev->vfd->name), "%s (%i)", + SOLO6X10_NAME, solo_dev->vfd->num); + + dev_info(&solo_dev->pdev->dev, "Display as /dev/video%d with %d inputs (%d extended)\n", + solo_dev->vfd->num, + solo_dev->nr_chans, solo_dev->nr_ext); + + return 0; + +fail: + video_device_release(solo_dev->vfd); + v4l2_ctrl_handler_free(&solo_dev->disp_hdl); + solo_dev->vfd = NULL; + return ret; +} + +void solo_v4l2_exit(struct solo_dev *solo_dev) +{ + if (solo_dev->vfd == NULL) + return; + + video_unregister_device(solo_dev->vfd); + v4l2_ctrl_handler_free(&solo_dev->disp_hdl); + solo_dev->vfd = NULL; +} |