2 * Copyright (C) 2010-2013 Bluecherry, LLC <http://www.bluecherrydvr.com>
5 * Ben Collins <bcollins@ubuntu.com>
8 * John Brooks <john.brooks@bluecherry.net>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/kthread.h>
28 #include <linux/freezer.h>
30 #include <media/v4l2-ioctl.h>
31 #include <media/v4l2-common.h>
32 #include <media/v4l2-event.h>
33 #include <media/videobuf2-dma-contig.h>
36 #include "solo6x10-tw28.h"
38 /* Image size is two fields, SOLO_HW_BPL is one horizontal line in hardware */
39 #define SOLO_HW_BPL 2048
40 #define solo_vlines(__solo) (__solo->video_vsize * 2)
41 #define solo_image_size(__solo) (solo_bytesperline(__solo) * \
43 #define solo_bytesperline(__solo) (__solo->video_hsize * 2)
45 #define MIN_VID_BUFFERS 2
47 static inline void erase_on(struct solo_dev *solo_dev)
49 solo_reg_write(solo_dev, SOLO_VO_DISP_ERASE, SOLO_VO_DISP_ERASE_ON);
50 solo_dev->erasing = 1;
51 solo_dev->frame_blank = 0;
54 static inline int erase_off(struct solo_dev *solo_dev)
56 if (!solo_dev->erasing)
59 /* First time around, assert erase off */
60 if (!solo_dev->frame_blank)
61 solo_reg_write(solo_dev, SOLO_VO_DISP_ERASE, 0);
62 /* Keep the erasing flag on for 8 frames minimum */
63 if (solo_dev->frame_blank++ >= 8)
64 solo_dev->erasing = 0;
69 void solo_video_in_isr(struct solo_dev *solo_dev)
71 wake_up_interruptible_all(&solo_dev->disp_thread_wait);
74 static void solo_win_setup(struct solo_dev *solo_dev, u8 ch,
75 int sx, int sy, int ex, int ey, int scale)
77 if (ch >= solo_dev->nr_chans)
80 /* Here, we just keep window/channel the same */
81 solo_reg_write(solo_dev, SOLO_VI_WIN_CTRL0(ch),
82 SOLO_VI_WIN_CHANNEL(ch) |
85 SOLO_VI_WIN_SCALE(scale));
87 solo_reg_write(solo_dev, SOLO_VI_WIN_CTRL1(ch),
92 static int solo_v4l2_ch_ext_4up(struct solo_dev *solo_dev, u8 idx, int on)
96 if (ch >= solo_dev->nr_chans)
101 for (i = ch; i < ch + 4; i++)
102 solo_win_setup(solo_dev, i, solo_dev->video_hsize,
103 solo_vlines(solo_dev),
104 solo_dev->video_hsize,
105 solo_vlines(solo_dev), 0);
110 solo_win_setup(solo_dev, ch, 0, 0, solo_dev->video_hsize / 2,
111 solo_vlines(solo_dev) / 2, 3);
112 solo_win_setup(solo_dev, ch + 1, solo_dev->video_hsize / 2, 0,
113 solo_dev->video_hsize, solo_vlines(solo_dev) / 2, 3);
115 solo_win_setup(solo_dev, ch + 2, 0, solo_vlines(solo_dev) / 2,
116 solo_dev->video_hsize / 2, solo_vlines(solo_dev), 3);
117 solo_win_setup(solo_dev, ch + 3, solo_dev->video_hsize / 2,
118 solo_vlines(solo_dev) / 2, solo_dev->video_hsize,
119 solo_vlines(solo_dev), 3);
124 static int solo_v4l2_ch_ext_16up(struct solo_dev *solo_dev, int on)
126 int sy, ysize, hsize, i;
129 for (i = 0; i < 16; i++)
130 solo_win_setup(solo_dev, i, solo_dev->video_hsize,
131 solo_vlines(solo_dev),
132 solo_dev->video_hsize,
133 solo_vlines(solo_dev), 0);
137 ysize = solo_vlines(solo_dev) / 4;
138 hsize = solo_dev->video_hsize / 4;
140 for (sy = 0, i = 0; i < 4; i++, sy += ysize) {
141 solo_win_setup(solo_dev, i * 4, 0, sy, hsize,
143 solo_win_setup(solo_dev, (i * 4) + 1, hsize, sy,
144 hsize * 2, sy + ysize, 5);
145 solo_win_setup(solo_dev, (i * 4) + 2, hsize * 2, sy,
146 hsize * 3, sy + ysize, 5);
147 solo_win_setup(solo_dev, (i * 4) + 3, hsize * 3, sy,
148 solo_dev->video_hsize, sy + ysize, 5);
154 static int solo_v4l2_ch(struct solo_dev *solo_dev, u8 ch, int on)
158 if (ch < solo_dev->nr_chans) {
159 solo_win_setup(solo_dev, ch, on ? 0 : solo_dev->video_hsize,
160 on ? 0 : solo_vlines(solo_dev),
161 solo_dev->video_hsize, solo_vlines(solo_dev),
166 if (ch >= solo_dev->nr_chans + solo_dev->nr_ext)
169 ext_ch = ch - solo_dev->nr_chans;
173 return solo_v4l2_ch_ext_4up(solo_dev, ext_ch, on);
175 /* Remaining case is 16up for 16-port */
176 return solo_v4l2_ch_ext_16up(solo_dev, on);
179 static int solo_v4l2_set_ch(struct solo_dev *solo_dev, u8 ch)
181 if (ch >= solo_dev->nr_chans + solo_dev->nr_ext)
186 solo_v4l2_ch(solo_dev, solo_dev->cur_disp_ch, 0);
187 solo_v4l2_ch(solo_dev, ch, 1);
189 solo_dev->cur_disp_ch = ch;
194 static void solo_fillbuf(struct solo_dev *solo_dev,
195 struct vb2_buffer *vb)
198 unsigned int fdma_addr;
202 vbuf = vb2_dma_contig_plane_dma_addr(vb, 0);
206 if (erase_off(solo_dev)) {
207 void *p = vb2_plane_vaddr(vb, 0);
208 int image_size = solo_image_size(solo_dev);
209 for (i = 0; i < image_size; i += 2) {
211 ((u8 *)p)[i + 1] = 0x00;
215 fdma_addr = SOLO_DISP_EXT_ADDR + (solo_dev->old_write *
216 (SOLO_HW_BPL * solo_vlines(solo_dev)));
218 error = solo_p2m_dma_t(solo_dev, 0, vbuf, fdma_addr,
219 solo_bytesperline(solo_dev),
220 solo_vlines(solo_dev), SOLO_HW_BPL);
225 vb2_set_plane_payload(vb, 0,
226 solo_vlines(solo_dev) * solo_bytesperline(solo_dev));
227 vb->v4l2_buf.sequence = solo_dev->sequence++;
228 v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
231 vb2_buffer_done(vb, error ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
234 static void solo_thread_try(struct solo_dev *solo_dev)
236 struct solo_vb2_buf *vb;
238 /* Only "break" from this loop if slock is held, otherwise
241 unsigned int cur_write;
243 cur_write = SOLO_VI_STATUS0_PAGE(
244 solo_reg_read(solo_dev, SOLO_VI_STATUS0));
245 if (cur_write == solo_dev->old_write)
248 spin_lock(&solo_dev->slock);
250 if (list_empty(&solo_dev->vidq_active))
253 vb = list_first_entry(&solo_dev->vidq_active, struct solo_vb2_buf,
256 solo_dev->old_write = cur_write;
259 spin_unlock(&solo_dev->slock);
261 solo_fillbuf(solo_dev, &vb->vb);
264 assert_spin_locked(&solo_dev->slock);
265 spin_unlock(&solo_dev->slock);
268 static int solo_thread(void *data)
270 struct solo_dev *solo_dev = data;
271 DECLARE_WAITQUEUE(wait, current);
274 add_wait_queue(&solo_dev->disp_thread_wait, &wait);
277 long timeout = schedule_timeout_interruptible(HZ);
278 if (timeout == -ERESTARTSYS || kthread_should_stop())
280 solo_thread_try(solo_dev);
284 remove_wait_queue(&solo_dev->disp_thread_wait, &wait);
289 static int solo_start_thread(struct solo_dev *solo_dev)
293 solo_dev->kthread = kthread_run(solo_thread, solo_dev, SOLO6X10_NAME "_disp");
295 if (IS_ERR(solo_dev->kthread)) {
296 ret = PTR_ERR(solo_dev->kthread);
297 solo_dev->kthread = NULL;
300 solo_irq_on(solo_dev, SOLO_IRQ_VIDEO_IN);
305 static void solo_stop_thread(struct solo_dev *solo_dev)
307 if (!solo_dev->kthread)
310 solo_irq_off(solo_dev, SOLO_IRQ_VIDEO_IN);
311 kthread_stop(solo_dev->kthread);
312 solo_dev->kthread = NULL;
315 static int solo_queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
316 unsigned int *num_buffers, unsigned int *num_planes,
317 unsigned int sizes[], void *alloc_ctxs[])
319 struct solo_dev *solo_dev = vb2_get_drv_priv(q);
321 sizes[0] = solo_image_size(solo_dev);
322 alloc_ctxs[0] = solo_dev->alloc_ctx;
325 if (*num_buffers < MIN_VID_BUFFERS)
326 *num_buffers = MIN_VID_BUFFERS;
331 static int solo_start_streaming(struct vb2_queue *q, unsigned int count)
333 struct solo_dev *solo_dev = vb2_get_drv_priv(q);
335 solo_dev->sequence = 0;
336 return solo_start_thread(solo_dev);
339 static int solo_stop_streaming(struct vb2_queue *q)
341 struct solo_dev *solo_dev = vb2_get_drv_priv(q);
343 solo_stop_thread(solo_dev);
344 INIT_LIST_HEAD(&solo_dev->vidq_active);
348 static void solo_buf_queue(struct vb2_buffer *vb)
350 struct vb2_queue *vq = vb->vb2_queue;
351 struct solo_dev *solo_dev = vb2_get_drv_priv(vq);
352 struct solo_vb2_buf *solo_vb =
353 container_of(vb, struct solo_vb2_buf, vb);
355 spin_lock(&solo_dev->slock);
356 list_add_tail(&solo_vb->list, &solo_dev->vidq_active);
357 spin_unlock(&solo_dev->slock);
358 wake_up_interruptible(&solo_dev->disp_thread_wait);
361 static const struct vb2_ops solo_video_qops = {
362 .queue_setup = solo_queue_setup,
363 .buf_queue = solo_buf_queue,
364 .start_streaming = solo_start_streaming,
365 .stop_streaming = solo_stop_streaming,
366 .wait_prepare = vb2_ops_wait_prepare,
367 .wait_finish = vb2_ops_wait_finish,
370 static int solo_querycap(struct file *file, void *priv,
371 struct v4l2_capability *cap)
373 struct solo_dev *solo_dev = video_drvdata(file);
375 strcpy(cap->driver, SOLO6X10_NAME);
376 strcpy(cap->card, "Softlogic 6x10");
377 snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s",
378 pci_name(solo_dev->pdev));
379 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
380 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
381 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
385 static int solo_enum_ext_input(struct solo_dev *solo_dev,
386 struct v4l2_input *input)
388 static const char * const dispnames_1[] = { "4UP" };
389 static const char * const dispnames_2[] = { "4UP-1", "4UP-2" };
390 static const char * const dispnames_5[] = {
391 "4UP-1", "4UP-2", "4UP-3", "4UP-4", "16UP"
393 const char * const *dispnames;
395 if (input->index >= (solo_dev->nr_chans + solo_dev->nr_ext))
398 if (solo_dev->nr_ext == 5)
399 dispnames = dispnames_5;
400 else if (solo_dev->nr_ext == 2)
401 dispnames = dispnames_2;
403 dispnames = dispnames_1;
405 snprintf(input->name, sizeof(input->name), "Multi %s",
406 dispnames[input->index - solo_dev->nr_chans]);
411 static int solo_enum_input(struct file *file, void *priv,
412 struct v4l2_input *input)
414 struct solo_dev *solo_dev = video_drvdata(file);
416 if (input->index >= solo_dev->nr_chans) {
417 int ret = solo_enum_ext_input(solo_dev, input);
421 snprintf(input->name, sizeof(input->name), "Camera %d",
424 /* We can only check this for normal inputs */
425 if (!tw28_get_video_status(solo_dev, input->index))
426 input->status = V4L2_IN_ST_NO_SIGNAL;
429 input->type = V4L2_INPUT_TYPE_CAMERA;
430 input->std = solo_dev->vfd->tvnorms;
434 static int solo_set_input(struct file *file, void *priv, unsigned int index)
436 struct solo_dev *solo_dev = video_drvdata(file);
437 int ret = solo_v4l2_set_ch(solo_dev, index);
440 while (erase_off(solo_dev))
447 static int solo_get_input(struct file *file, void *priv, unsigned int *index)
449 struct solo_dev *solo_dev = video_drvdata(file);
451 *index = solo_dev->cur_disp_ch;
456 static int solo_enum_fmt_cap(struct file *file, void *priv,
457 struct v4l2_fmtdesc *f)
462 f->pixelformat = V4L2_PIX_FMT_UYVY;
463 strlcpy(f->description, "UYUV 4:2:2 Packed", sizeof(f->description));
468 static int solo_try_fmt_cap(struct file *file, void *priv,
469 struct v4l2_format *f)
471 struct solo_dev *solo_dev = video_drvdata(file);
472 struct v4l2_pix_format *pix = &f->fmt.pix;
473 int image_size = solo_image_size(solo_dev);
475 if (pix->pixelformat != V4L2_PIX_FMT_UYVY)
478 pix->width = solo_dev->video_hsize;
479 pix->height = solo_vlines(solo_dev);
480 pix->sizeimage = image_size;
481 pix->field = V4L2_FIELD_INTERLACED;
482 pix->pixelformat = V4L2_PIX_FMT_UYVY;
483 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
488 static int solo_set_fmt_cap(struct file *file, void *priv,
489 struct v4l2_format *f)
491 struct solo_dev *solo_dev = video_drvdata(file);
493 if (vb2_is_busy(&solo_dev->vidq))
496 /* For right now, if it doesn't match our running config,
498 return solo_try_fmt_cap(file, priv, f);
501 static int solo_get_fmt_cap(struct file *file, void *priv,
502 struct v4l2_format *f)
504 struct solo_dev *solo_dev = video_drvdata(file);
505 struct v4l2_pix_format *pix = &f->fmt.pix;
507 pix->width = solo_dev->video_hsize;
508 pix->height = solo_vlines(solo_dev);
509 pix->pixelformat = V4L2_PIX_FMT_UYVY;
510 pix->field = V4L2_FIELD_INTERLACED;
511 pix->sizeimage = solo_image_size(solo_dev);
512 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
513 pix->bytesperline = solo_bytesperline(solo_dev);
519 static int solo_g_std(struct file *file, void *priv, v4l2_std_id *i)
521 struct solo_dev *solo_dev = video_drvdata(file);
523 if (solo_dev->video_type == SOLO_VO_FMT_TYPE_NTSC)
524 *i = V4L2_STD_NTSC_M;
530 int solo_set_video_type(struct solo_dev *solo_dev, bool is_50hz)
534 /* Make sure all video nodes are idle */
535 if (vb2_is_busy(&solo_dev->vidq))
537 for (i = 0; i < solo_dev->nr_chans; i++)
538 if (vb2_is_busy(&solo_dev->v4l2_enc[i]->vidq))
540 solo_dev->video_type = is_50hz ? SOLO_VO_FMT_TYPE_PAL :
541 SOLO_VO_FMT_TYPE_NTSC;
542 /* Reconfigure for the new standard */
543 solo_disp_init(solo_dev);
544 solo_enc_init(solo_dev);
545 solo_tw28_init(solo_dev);
546 for (i = 0; i < solo_dev->nr_chans; i++)
547 solo_update_mode(solo_dev->v4l2_enc[i]);
548 return solo_v4l2_set_ch(solo_dev, solo_dev->cur_disp_ch);
551 static int solo_s_std(struct file *file, void *priv, v4l2_std_id std)
553 struct solo_dev *solo_dev = video_drvdata(file);
555 return solo_set_video_type(solo_dev, std & V4L2_STD_625_50);
558 static int solo_s_ctrl(struct v4l2_ctrl *ctrl)
560 struct solo_dev *solo_dev =
561 container_of(ctrl->handler, struct solo_dev, disp_hdl);
564 case V4L2_CID_MOTION_TRACE:
566 solo_reg_write(solo_dev, SOLO_VI_MOTION_BORDER,
567 SOLO_VI_MOTION_Y_ADD |
568 SOLO_VI_MOTION_Y_VALUE(0x20) |
569 SOLO_VI_MOTION_CB_VALUE(0x10) |
570 SOLO_VI_MOTION_CR_VALUE(0x10));
571 solo_reg_write(solo_dev, SOLO_VI_MOTION_BAR,
572 SOLO_VI_MOTION_CR_ADD |
573 SOLO_VI_MOTION_Y_VALUE(0x10) |
574 SOLO_VI_MOTION_CB_VALUE(0x80) |
575 SOLO_VI_MOTION_CR_VALUE(0x10));
577 solo_reg_write(solo_dev, SOLO_VI_MOTION_BORDER, 0);
578 solo_reg_write(solo_dev, SOLO_VI_MOTION_BAR, 0);
587 static const struct v4l2_file_operations solo_v4l2_fops = {
588 .owner = THIS_MODULE,
589 .open = v4l2_fh_open,
590 .release = vb2_fop_release,
591 .read = vb2_fop_read,
592 .poll = vb2_fop_poll,
593 .mmap = vb2_fop_mmap,
594 .unlocked_ioctl = video_ioctl2,
597 static const struct v4l2_ioctl_ops solo_v4l2_ioctl_ops = {
598 .vidioc_querycap = solo_querycap,
599 .vidioc_s_std = solo_s_std,
600 .vidioc_g_std = solo_g_std,
601 /* Input callbacks */
602 .vidioc_enum_input = solo_enum_input,
603 .vidioc_s_input = solo_set_input,
604 .vidioc_g_input = solo_get_input,
605 /* Video capture format callbacks */
606 .vidioc_enum_fmt_vid_cap = solo_enum_fmt_cap,
607 .vidioc_try_fmt_vid_cap = solo_try_fmt_cap,
608 .vidioc_s_fmt_vid_cap = solo_set_fmt_cap,
609 .vidioc_g_fmt_vid_cap = solo_get_fmt_cap,
611 .vidioc_reqbufs = vb2_ioctl_reqbufs,
612 .vidioc_querybuf = vb2_ioctl_querybuf,
613 .vidioc_qbuf = vb2_ioctl_qbuf,
614 .vidioc_dqbuf = vb2_ioctl_dqbuf,
615 .vidioc_streamon = vb2_ioctl_streamon,
616 .vidioc_streamoff = vb2_ioctl_streamoff,
617 /* Logging and events */
618 .vidioc_log_status = v4l2_ctrl_log_status,
619 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
620 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
623 static struct video_device solo_v4l2_template = {
624 .name = SOLO6X10_NAME,
625 .fops = &solo_v4l2_fops,
626 .ioctl_ops = &solo_v4l2_ioctl_ops,
628 .release = video_device_release,
629 .tvnorms = V4L2_STD_NTSC_M | V4L2_STD_PAL,
632 static const struct v4l2_ctrl_ops solo_ctrl_ops = {
633 .s_ctrl = solo_s_ctrl,
636 static const struct v4l2_ctrl_config solo_motion_trace_ctrl = {
637 .ops = &solo_ctrl_ops,
638 .id = V4L2_CID_MOTION_TRACE,
639 .name = "Motion Detection Trace",
640 .type = V4L2_CTRL_TYPE_BOOLEAN,
645 int solo_v4l2_init(struct solo_dev *solo_dev, unsigned nr)
650 init_waitqueue_head(&solo_dev->disp_thread_wait);
651 spin_lock_init(&solo_dev->slock);
652 mutex_init(&solo_dev->lock);
653 INIT_LIST_HEAD(&solo_dev->vidq_active);
655 solo_dev->vfd = video_device_alloc();
659 *solo_dev->vfd = solo_v4l2_template;
660 solo_dev->vfd->v4l2_dev = &solo_dev->v4l2_dev;
661 solo_dev->vfd->queue = &solo_dev->vidq;
662 solo_dev->vfd->lock = &solo_dev->lock;
663 v4l2_ctrl_handler_init(&solo_dev->disp_hdl, 1);
664 v4l2_ctrl_new_custom(&solo_dev->disp_hdl, &solo_motion_trace_ctrl, NULL);
665 if (solo_dev->disp_hdl.error) {
666 ret = solo_dev->disp_hdl.error;
669 solo_dev->vfd->ctrl_handler = &solo_dev->disp_hdl;
670 set_bit(V4L2_FL_USE_FH_PRIO, &solo_dev->vfd->flags);
672 video_set_drvdata(solo_dev->vfd, solo_dev);
674 solo_dev->vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
675 solo_dev->vidq.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
676 solo_dev->vidq.ops = &solo_video_qops;
677 solo_dev->vidq.mem_ops = &vb2_dma_contig_memops;
678 solo_dev->vidq.drv_priv = solo_dev;
679 solo_dev->vidq.timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
680 solo_dev->vidq.gfp_flags = __GFP_DMA32;
681 solo_dev->vidq.buf_struct_size = sizeof(struct solo_vb2_buf);
682 solo_dev->vidq.lock = &solo_dev->lock;
683 ret = vb2_queue_init(&solo_dev->vidq);
687 solo_dev->alloc_ctx = vb2_dma_contig_init_ctx(&solo_dev->pdev->dev);
688 if (IS_ERR(solo_dev->alloc_ctx)) {
689 dev_err(&solo_dev->pdev->dev, "Can't allocate buffer context");
690 return PTR_ERR(solo_dev->alloc_ctx);
693 /* Cycle all the channels and clear */
694 for (i = 0; i < solo_dev->nr_chans; i++) {
695 solo_v4l2_set_ch(solo_dev, i);
696 while (erase_off(solo_dev))
700 /* Set the default display channel */
701 solo_v4l2_set_ch(solo_dev, 0);
702 while (erase_off(solo_dev))
705 ret = video_register_device(solo_dev->vfd, VFL_TYPE_GRABBER, nr);
709 snprintf(solo_dev->vfd->name, sizeof(solo_dev->vfd->name), "%s (%i)",
710 SOLO6X10_NAME, solo_dev->vfd->num);
712 dev_info(&solo_dev->pdev->dev, "Display as /dev/video%d with "
713 "%d inputs (%d extended)\n", solo_dev->vfd->num,
714 solo_dev->nr_chans, solo_dev->nr_ext);
719 video_device_release(solo_dev->vfd);
720 vb2_dma_contig_cleanup_ctx(solo_dev->alloc_ctx);
721 v4l2_ctrl_handler_free(&solo_dev->disp_hdl);
722 solo_dev->vfd = NULL;
726 void solo_v4l2_exit(struct solo_dev *solo_dev)
728 if (solo_dev->vfd == NULL)
731 video_unregister_device(solo_dev->vfd);
732 vb2_dma_contig_cleanup_ctx(solo_dev->alloc_ctx);
733 v4l2_ctrl_handler_free(&solo_dev->disp_hdl);
734 solo_dev->vfd = NULL;