solo6x10-v4l2.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * Copyright (C) 2010-2013 Bluecherry, LLC <https://www.bluecherrydvr.com>
  4 *
  5 * Original author:
  6 * Ben Collins <bcollins@ubuntu.com>
  7 *
  8 * Additional work by:
  9 * John Brooks <john.brooks@bluecherry.net>
 10 */
 11
 12#include <linux/kernel.h>
 13#include <linux/module.h>
 14#include <linux/kthread.h>
 15#include <linux/freezer.h>
 16
 17#include <media/v4l2-ioctl.h>
 18#include <media/v4l2-common.h>
 19#include <media/v4l2-event.h>
 20#include <media/videobuf2-v4l2.h>
 21#include <media/videobuf2-dma-contig.h>
 22
 23#include "solo6x10.h"
 24#include "solo6x10-tw28.h"
 25
 26/* Image size is two fields, SOLO_HW_BPL is one horizontal line in hardware */
 27#define SOLO_HW_BPL		2048
 28#define solo_vlines(__solo)	(__solo->video_vsize * 2)
 29#define solo_image_size(__solo) (solo_bytesperline(__solo) * \
 30				 solo_vlines(__solo))
 31#define solo_bytesperline(__solo) (__solo->video_hsize * 2)
 32
 33#define MIN_VID_BUFFERS		2
 34
 35static inline void erase_on(struct solo_dev *solo_dev)
 36{
 37	solo_reg_write(solo_dev, SOLO_VO_DISP_ERASE, SOLO_VO_DISP_ERASE_ON);
 38	solo_dev->erasing = 1;
 39	solo_dev->frame_blank = 0;
 40}
 41
 42static inline int erase_off(struct solo_dev *solo_dev)
 43{
 44	if (!solo_dev->erasing)
 45		return 0;
 46
 47	/* First time around, assert erase off */
 48	if (!solo_dev->frame_blank)
 49		solo_reg_write(solo_dev, SOLO_VO_DISP_ERASE, 0);
 50	/* Keep the erasing flag on for 8 frames minimum */
 51	if (solo_dev->frame_blank++ >= 8)
 52		solo_dev->erasing = 0;
 53
 54	return 1;
 55}
 56
 57void solo_video_in_isr(struct solo_dev *solo_dev)
 58{
 59	wake_up_interruptible_all(&solo_dev->disp_thread_wait);
 60}
 61
 62static void solo_win_setup(struct solo_dev *solo_dev, u8 ch,
 63			   int sx, int sy, int ex, int ey, int scale)
 64{
 65	if (ch >= solo_dev->nr_chans)
 66		return;
 67
 68	/* Here, we just keep window/channel the same */
 69	solo_reg_write(solo_dev, SOLO_VI_WIN_CTRL0(ch),
 70		       SOLO_VI_WIN_CHANNEL(ch) |
 71		       SOLO_VI_WIN_SX(sx) |
 72		       SOLO_VI_WIN_EX(ex) |
 73		       SOLO_VI_WIN_SCALE(scale));
 74
 75	solo_reg_write(solo_dev, SOLO_VI_WIN_CTRL1(ch),
 76		       SOLO_VI_WIN_SY(sy) |
 77		       SOLO_VI_WIN_EY(ey));
 78}
 79
 80static int solo_v4l2_ch_ext_4up(struct solo_dev *solo_dev, u8 idx, int on)
 81{
 82	u8 ch = idx * 4;
 83
 84	if (ch >= solo_dev->nr_chans)
 85		return -EINVAL;
 86
 87	if (!on) {
 88		u8 i;
 89
 90		for (i = ch; i < ch + 4; i++)
 91			solo_win_setup(solo_dev, i, solo_dev->video_hsize,
 92				       solo_vlines(solo_dev),
 93				       solo_dev->video_hsize,
 94				       solo_vlines(solo_dev), 0);
 95		return 0;
 96	}
 97
 98	/* Row 1 */
 99	solo_win_setup(solo_dev, ch, 0, 0, solo_dev->video_hsize / 2,
100		       solo_vlines(solo_dev) / 2, 3);
101	solo_win_setup(solo_dev, ch + 1, solo_dev->video_hsize / 2, 0,
102		       solo_dev->video_hsize, solo_vlines(solo_dev) / 2, 3);
103	/* Row 2 */
104	solo_win_setup(solo_dev, ch + 2, 0, solo_vlines(solo_dev) / 2,
105		       solo_dev->video_hsize / 2, solo_vlines(solo_dev), 3);
106	solo_win_setup(solo_dev, ch + 3, solo_dev->video_hsize / 2,
107		       solo_vlines(solo_dev) / 2, solo_dev->video_hsize,
108		       solo_vlines(solo_dev), 3);
109
110	return 0;
111}
112
113static int solo_v4l2_ch_ext_16up(struct solo_dev *solo_dev, int on)
114{
115	int sy, ysize, hsize, i;
116
117	if (!on) {
118		for (i = 0; i < 16; i++)
119			solo_win_setup(solo_dev, i, solo_dev->video_hsize,
120				       solo_vlines(solo_dev),
121				       solo_dev->video_hsize,
122				       solo_vlines(solo_dev), 0);
123		return 0;
124	}
125
126	ysize = solo_vlines(solo_dev) / 4;
127	hsize = solo_dev->video_hsize / 4;
128
129	for (sy = 0, i = 0; i < 4; i++, sy += ysize) {
130		solo_win_setup(solo_dev, i * 4, 0, sy, hsize,
131			       sy + ysize, 5);
132		solo_win_setup(solo_dev, (i * 4) + 1, hsize, sy,
133			       hsize * 2, sy + ysize, 5);
134		solo_win_setup(solo_dev, (i * 4) + 2, hsize * 2, sy,
135			       hsize * 3, sy + ysize, 5);
136		solo_win_setup(solo_dev, (i * 4) + 3, hsize * 3, sy,
137			       solo_dev->video_hsize, sy + ysize, 5);
138	}
139
140	return 0;
141}
142
143static int solo_v4l2_ch(struct solo_dev *solo_dev, u8 ch, int on)
144{
145	u8 ext_ch;
146
147	if (ch < solo_dev->nr_chans) {
148		solo_win_setup(solo_dev, ch, on ? 0 : solo_dev->video_hsize,
149			       on ? 0 : solo_vlines(solo_dev),
150			       solo_dev->video_hsize, solo_vlines(solo_dev),
151			       on ? 1 : 0);
152		return 0;
153	}
154
155	if (ch >= solo_dev->nr_chans + solo_dev->nr_ext)
156		return -EINVAL;
157
158	ext_ch = ch - solo_dev->nr_chans;
159
160	/* 4up's first */
161	if (ext_ch < 4)
162		return solo_v4l2_ch_ext_4up(solo_dev, ext_ch, on);
163
164	/* Remaining case is 16up for 16-port */
165	return solo_v4l2_ch_ext_16up(solo_dev, on);
166}
167
168static int solo_v4l2_set_ch(struct solo_dev *solo_dev, u8 ch)
169{
170	if (ch >= solo_dev->nr_chans + solo_dev->nr_ext)
171		return -EINVAL;
172
173	erase_on(solo_dev);
174
175	solo_v4l2_ch(solo_dev, solo_dev->cur_disp_ch, 0);
176	solo_v4l2_ch(solo_dev, ch, 1);
177
178	solo_dev->cur_disp_ch = ch;
179
180	return 0;
181}
182
183static void solo_fillbuf(struct solo_dev *solo_dev,
184			 struct vb2_buffer *vb)
185{
186	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
187	dma_addr_t addr;
188	unsigned int fdma_addr;
189	int error = -1;
190	int i;
191
192	addr = vb2_dma_contig_plane_dma_addr(vb, 0);
193	if (!addr)
194		goto finish_buf;
195
196	if (erase_off(solo_dev)) {
197		void *p = vb2_plane_vaddr(vb, 0);
198		int image_size = solo_image_size(solo_dev);
199
200		for (i = 0; i < image_size; i += 2) {
201			((u8 *)p)[i] = 0x80;
202			((u8 *)p)[i + 1] = 0x00;
203		}
204		error = 0;
205	} else {
206		fdma_addr = SOLO_DISP_EXT_ADDR + (solo_dev->old_write *
207				(SOLO_HW_BPL * solo_vlines(solo_dev)));
208
209		error = solo_p2m_dma_t(solo_dev, 0, addr, fdma_addr,
210				       solo_bytesperline(solo_dev),
211				       solo_vlines(solo_dev), SOLO_HW_BPL);
212	}
213
214finish_buf:
215	if (!error) {
216		vb2_set_plane_payload(vb, 0,
217			solo_vlines(solo_dev) * solo_bytesperline(solo_dev));
218		vbuf->sequence = solo_dev->sequence++;
219		vb->timestamp = ktime_get_ns();
220	}
221
222	vb2_buffer_done(vb, error ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
223}
224
225static void solo_thread_try(struct solo_dev *solo_dev)
226{
227	struct solo_vb2_buf *vb;
228
229	/* Only "break" from this loop if slock is held, otherwise
230	 * just return. */
231	for (;;) {
232		unsigned int cur_write;
233
234		cur_write = SOLO_VI_STATUS0_PAGE(
235			solo_reg_read(solo_dev, SOLO_VI_STATUS0));
236		if (cur_write == solo_dev->old_write)
237			return;
238
239		spin_lock(&solo_dev->slock);
240
241		if (list_empty(&solo_dev->vidq_active))
242			break;
243
244		vb = list_first_entry(&solo_dev->vidq_active, struct solo_vb2_buf,
245				      list);
246
247		solo_dev->old_write = cur_write;
248		list_del(&vb->list);
249
250		spin_unlock(&solo_dev->slock);
251
252		solo_fillbuf(solo_dev, &vb->vb.vb2_buf);
253	}
254
255	assert_spin_locked(&solo_dev->slock);
256	spin_unlock(&solo_dev->slock);
257}
258
259static int solo_thread(void *data)
260{
261	struct solo_dev *solo_dev = data;
262	DECLARE_WAITQUEUE(wait, current);
263
264	set_freezable();
265	add_wait_queue(&solo_dev->disp_thread_wait, &wait);
266
267	for (;;) {
268		long timeout = schedule_timeout_interruptible(HZ);
269
270		if (timeout == -ERESTARTSYS || kthread_should_stop())
271			break;
272		solo_thread_try(solo_dev);
273		try_to_freeze();
274	}
275
276	remove_wait_queue(&solo_dev->disp_thread_wait, &wait);
277
278	return 0;
279}
280
281static int solo_start_thread(struct solo_dev *solo_dev)
282{
283	int ret = 0;
284
285	solo_dev->kthread = kthread_run(solo_thread, solo_dev, SOLO6X10_NAME "_disp");
286
287	if (IS_ERR(solo_dev->kthread)) {
288		ret = PTR_ERR(solo_dev->kthread);
289		solo_dev->kthread = NULL;
290		return ret;
291	}
292	solo_irq_on(solo_dev, SOLO_IRQ_VIDEO_IN);
293
294	return ret;
295}
296
297static void solo_stop_thread(struct solo_dev *solo_dev)
298{
299	if (!solo_dev->kthread)
300		return;
301
302	solo_irq_off(solo_dev, SOLO_IRQ_VIDEO_IN);
303	kthread_stop(solo_dev->kthread);
304	solo_dev->kthread = NULL;
305}
306
307static int solo_queue_setup(struct vb2_queue *q,
308			   unsigned int *num_buffers, unsigned int *num_planes,
309			   unsigned int sizes[], struct device *alloc_devs[])
310{
311	struct solo_dev *solo_dev = vb2_get_drv_priv(q);
312
313	sizes[0] = solo_image_size(solo_dev);
314	*num_planes = 1;
315
316	if (*num_buffers < MIN_VID_BUFFERS)
317		*num_buffers = MIN_VID_BUFFERS;
318
319	return 0;
320}
321
322static int solo_start_streaming(struct vb2_queue *q, unsigned int count)
323{
324	struct solo_dev *solo_dev = vb2_get_drv_priv(q);
325
326	solo_dev->sequence = 0;
327	return solo_start_thread(solo_dev);
328}
329
330static void solo_stop_streaming(struct vb2_queue *q)
331{
332	struct solo_dev *solo_dev = vb2_get_drv_priv(q);
333
334	solo_stop_thread(solo_dev);
335
336	spin_lock(&solo_dev->slock);
337	while (!list_empty(&solo_dev->vidq_active)) {
338		struct solo_vb2_buf *buf = list_entry(
339				solo_dev->vidq_active.next,
340				struct solo_vb2_buf, list);
341
342		list_del(&buf->list);
343		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
344	}
345	spin_unlock(&solo_dev->slock);
346	INIT_LIST_HEAD(&solo_dev->vidq_active);
347}
348
349static void solo_buf_queue(struct vb2_buffer *vb)
350{
351	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
352	struct vb2_queue *vq = vb->vb2_queue;
353	struct solo_dev *solo_dev = vb2_get_drv_priv(vq);
354	struct solo_vb2_buf *solo_vb =
355		container_of(vbuf, struct solo_vb2_buf, vb);
356
357	spin_lock(&solo_dev->slock);
358	list_add_tail(&solo_vb->list, &solo_dev->vidq_active);
359	spin_unlock(&solo_dev->slock);
360	wake_up_interruptible(&solo_dev->disp_thread_wait);
361}
362
363static const struct vb2_ops solo_video_qops = {
364	.queue_setup	= solo_queue_setup,
365	.buf_queue	= solo_buf_queue,
366	.start_streaming = solo_start_streaming,
367	.stop_streaming = solo_stop_streaming,
368};
369
370static int solo_querycap(struct file *file, void  *priv,
371			 struct v4l2_capability *cap)
372{
373	strscpy(cap->driver, SOLO6X10_NAME, sizeof(cap->driver));
374	strscpy(cap->card, "Softlogic 6x10", sizeof(cap->card));
375	return 0;
376}
377
378static int solo_enum_ext_input(struct solo_dev *solo_dev,
379			       struct v4l2_input *input)
380{
381	int ext = input->index - solo_dev->nr_chans;
382	unsigned int nup, first;
383
384	if (ext >= solo_dev->nr_ext)
385		return -EINVAL;
386
387	nup   = (ext == 4) ? 16 : 4;
388	first = (ext & 3) << 2; /* first channel in the n-up */
389	snprintf(input->name, sizeof(input->name),
390		 "Multi %d-up (cameras %d-%d)",
391		 nup, first + 1, first + nup);
392	/* Possible outputs:
393	 *  Multi 4-up (cameras 1-4)
394	 *  Multi 4-up (cameras 5-8)
395	 *  Multi 4-up (cameras 9-12)
396	 *  Multi 4-up (cameras 13-16)
397	 *  Multi 16-up (cameras 1-16)
398	 */
399	return 0;
400}
401
402static int solo_enum_input(struct file *file, void *priv,
403			   struct v4l2_input *input)
404{
405	struct solo_dev *solo_dev = video_drvdata(file);
406
407	if (input->index >= solo_dev->nr_chans) {
408		int ret = solo_enum_ext_input(solo_dev, input);
409
410		if (ret < 0)
411			return ret;
412	} else {
413		snprintf(input->name, sizeof(input->name), "Camera %d",
414			 input->index + 1);
415
416		/* We can only check this for normal inputs */
417		if (!tw28_get_video_status(solo_dev, input->index))
418			input->status = V4L2_IN_ST_NO_SIGNAL;
419	}
420
421	input->type = V4L2_INPUT_TYPE_CAMERA;
422	input->std = solo_dev->vfd->tvnorms;
423	return 0;
424}
425
426static int solo_set_input(struct file *file, void *priv, unsigned int index)
427{
428	struct solo_dev *solo_dev = video_drvdata(file);
429	int ret = solo_v4l2_set_ch(solo_dev, index);
430
431	if (!ret) {
432		while (erase_off(solo_dev))
433			/* Do nothing */;
434	}
435
436	return ret;
437}
438
439static int solo_get_input(struct file *file, void *priv, unsigned int *index)
440{
441	struct solo_dev *solo_dev = video_drvdata(file);
442
443	*index = solo_dev->cur_disp_ch;
444
445	return 0;
446}
447
448static int solo_enum_fmt_cap(struct file *file, void *priv,
449			     struct v4l2_fmtdesc *f)
450{
451	if (f->index)
452		return -EINVAL;
453
454	f->pixelformat = V4L2_PIX_FMT_UYVY;
455	return 0;
456}
457
458static int solo_try_fmt_cap(struct file *file, void *priv,
459			    struct v4l2_format *f)
460{
461	struct solo_dev *solo_dev = video_drvdata(file);
462	struct v4l2_pix_format *pix = &f->fmt.pix;
463	int image_size = solo_image_size(solo_dev);
464
465	if (pix->pixelformat != V4L2_PIX_FMT_UYVY)
466		return -EINVAL;
467
468	pix->width = solo_dev->video_hsize;
469	pix->height = solo_vlines(solo_dev);
470	pix->sizeimage = image_size;
471	pix->field = V4L2_FIELD_INTERLACED;
472	pix->pixelformat = V4L2_PIX_FMT_UYVY;
473	pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
474	return 0;
475}
476
477static int solo_set_fmt_cap(struct file *file, void *priv,
478			    struct v4l2_format *f)
479{
480	struct solo_dev *solo_dev = video_drvdata(file);
481
482	if (vb2_is_busy(&solo_dev->vidq))
483		return -EBUSY;
484
485	/* For right now, if it doesn't match our running config,
486	 * then fail */
487	return solo_try_fmt_cap(file, priv, f);
488}
489
490static int solo_get_fmt_cap(struct file *file, void *priv,
491			    struct v4l2_format *f)
492{
493	struct solo_dev *solo_dev = video_drvdata(file);
494	struct v4l2_pix_format *pix = &f->fmt.pix;
495
496	pix->width = solo_dev->video_hsize;
497	pix->height = solo_vlines(solo_dev);
498	pix->pixelformat = V4L2_PIX_FMT_UYVY;
499	pix->field = V4L2_FIELD_INTERLACED;
500	pix->sizeimage = solo_image_size(solo_dev);
501	pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
502	pix->bytesperline = solo_bytesperline(solo_dev);
503
504	return 0;
505}
506
507static int solo_g_std(struct file *file, void *priv, v4l2_std_id *i)
508{
509	struct solo_dev *solo_dev = video_drvdata(file);
510
511	if (solo_dev->video_type == SOLO_VO_FMT_TYPE_NTSC)
512		*i = V4L2_STD_NTSC_M;
513	else
514		*i = V4L2_STD_PAL;
515	return 0;
516}
517
518int solo_set_video_type(struct solo_dev *solo_dev, bool is_50hz)
519{
520	int i;
521
522	/* Make sure all video nodes are idle */
523	if (vb2_is_busy(&solo_dev->vidq))
524		return -EBUSY;
525	for (i = 0; i < solo_dev->nr_chans; i++)
526		if (vb2_is_busy(&solo_dev->v4l2_enc[i]->vidq))
527			return -EBUSY;
528	solo_dev->video_type = is_50hz ? SOLO_VO_FMT_TYPE_PAL :
529					 SOLO_VO_FMT_TYPE_NTSC;
530	/* Reconfigure for the new standard */
531	solo_disp_init(solo_dev);
532	solo_enc_init(solo_dev);
533	solo_tw28_init(solo_dev);
534	for (i = 0; i < solo_dev->nr_chans; i++)
535		solo_update_mode(solo_dev->v4l2_enc[i]);
536	return solo_v4l2_set_ch(solo_dev, solo_dev->cur_disp_ch);
537}
538
539static int solo_s_std(struct file *file, void *priv, v4l2_std_id std)
540{
541	struct solo_dev *solo_dev = video_drvdata(file);
542
543	return solo_set_video_type(solo_dev, std & V4L2_STD_625_50);
544}
545
546static int solo_s_ctrl(struct v4l2_ctrl *ctrl)
547{
548	struct solo_dev *solo_dev =
549		container_of(ctrl->handler, struct solo_dev, disp_hdl);
550
551	switch (ctrl->id) {
552	case V4L2_CID_MOTION_TRACE:
553		if (ctrl->val) {
554			solo_reg_write(solo_dev, SOLO_VI_MOTION_BORDER,
555					SOLO_VI_MOTION_Y_ADD |
556					SOLO_VI_MOTION_Y_VALUE(0x20) |
557					SOLO_VI_MOTION_CB_VALUE(0x10) |
558					SOLO_VI_MOTION_CR_VALUE(0x10));
559			solo_reg_write(solo_dev, SOLO_VI_MOTION_BAR,
560					SOLO_VI_MOTION_CR_ADD |
561					SOLO_VI_MOTION_Y_VALUE(0x10) |
562					SOLO_VI_MOTION_CB_VALUE(0x80) |
563					SOLO_VI_MOTION_CR_VALUE(0x10));
564		} else {
565			solo_reg_write(solo_dev, SOLO_VI_MOTION_BORDER, 0);
566			solo_reg_write(solo_dev, SOLO_VI_MOTION_BAR, 0);
567		}
568		return 0;
569	default:
570		break;
571	}
572	return -EINVAL;
573}
574
575static const struct v4l2_file_operations solo_v4l2_fops = {
576	.owner			= THIS_MODULE,
577	.open			= v4l2_fh_open,
578	.release		= vb2_fop_release,
579	.read			= vb2_fop_read,
580	.poll			= vb2_fop_poll,
581	.mmap			= vb2_fop_mmap,
582	.unlocked_ioctl		= video_ioctl2,
583};
584
585static const struct v4l2_ioctl_ops solo_v4l2_ioctl_ops = {
586	.vidioc_querycap		= solo_querycap,
587	.vidioc_s_std			= solo_s_std,
588	.vidioc_g_std			= solo_g_std,
589	/* Input callbacks */
590	.vidioc_enum_input		= solo_enum_input,
591	.vidioc_s_input			= solo_set_input,
592	.vidioc_g_input			= solo_get_input,
593	/* Video capture format callbacks */
594	.vidioc_enum_fmt_vid_cap	= solo_enum_fmt_cap,
595	.vidioc_try_fmt_vid_cap		= solo_try_fmt_cap,
596	.vidioc_s_fmt_vid_cap		= solo_set_fmt_cap,
597	.vidioc_g_fmt_vid_cap		= solo_get_fmt_cap,
598	/* Streaming I/O */
599	.vidioc_reqbufs			= vb2_ioctl_reqbufs,
600	.vidioc_querybuf		= vb2_ioctl_querybuf,
601	.vidioc_qbuf			= vb2_ioctl_qbuf,
602	.vidioc_dqbuf			= vb2_ioctl_dqbuf,
603	.vidioc_streamon		= vb2_ioctl_streamon,
604	.vidioc_streamoff		= vb2_ioctl_streamoff,
605	/* Logging and events */
606	.vidioc_log_status		= v4l2_ctrl_log_status,
607	.vidioc_subscribe_event		= v4l2_ctrl_subscribe_event,
608	.vidioc_unsubscribe_event	= v4l2_event_unsubscribe,
609};
610
611static const struct video_device solo_v4l2_template = {
612	.name			= SOLO6X10_NAME,
613	.fops			= &solo_v4l2_fops,
614	.ioctl_ops		= &solo_v4l2_ioctl_ops,
615	.minor			= -1,
616	.release		= video_device_release,
617	.tvnorms		= V4L2_STD_NTSC_M | V4L2_STD_PAL,
618	.device_caps		= V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
619				  V4L2_CAP_STREAMING,
620};
621
622static const struct v4l2_ctrl_ops solo_ctrl_ops = {
623	.s_ctrl = solo_s_ctrl,
624};
625
626static const struct v4l2_ctrl_config solo_motion_trace_ctrl = {
627	.ops = &solo_ctrl_ops,
628	.id = V4L2_CID_MOTION_TRACE,
629	.name = "Motion Detection Trace",
630	.type = V4L2_CTRL_TYPE_BOOLEAN,
631	.max = 1,
632	.step = 1,
633};
634
635int solo_v4l2_init(struct solo_dev *solo_dev, unsigned nr)
636{
637	int ret;
638	int i;
639
640	init_waitqueue_head(&solo_dev->disp_thread_wait);
641	spin_lock_init(&solo_dev->slock);
642	mutex_init(&solo_dev->lock);
643	INIT_LIST_HEAD(&solo_dev->vidq_active);
644
645	solo_dev->vfd = video_device_alloc();
646	if (!solo_dev->vfd)
647		return -ENOMEM;
648
649	*solo_dev->vfd = solo_v4l2_template;
650	solo_dev->vfd->v4l2_dev = &solo_dev->v4l2_dev;
651	solo_dev->vfd->queue = &solo_dev->vidq;
652	solo_dev->vfd->lock = &solo_dev->lock;
653	v4l2_ctrl_handler_init(&solo_dev->disp_hdl, 1);
654	v4l2_ctrl_new_custom(&solo_dev->disp_hdl, &solo_motion_trace_ctrl, NULL);
655	if (solo_dev->disp_hdl.error) {
656		ret = solo_dev->disp_hdl.error;
657		goto fail;
658	}
659	solo_dev->vfd->ctrl_handler = &solo_dev->disp_hdl;
660
661	video_set_drvdata(solo_dev->vfd, solo_dev);
662
663	solo_dev->vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
664	solo_dev->vidq.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
665	solo_dev->vidq.ops = &solo_video_qops;
666	solo_dev->vidq.mem_ops = &vb2_dma_contig_memops;
667	solo_dev->vidq.drv_priv = solo_dev;
668	solo_dev->vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
669	solo_dev->vidq.gfp_flags = __GFP_DMA32 | __GFP_KSWAPD_RECLAIM;
670	solo_dev->vidq.buf_struct_size = sizeof(struct solo_vb2_buf);
671	solo_dev->vidq.lock = &solo_dev->lock;
672	solo_dev->vidq.dev = &solo_dev->pdev->dev;
673	ret = vb2_queue_init(&solo_dev->vidq);
674	if (ret < 0)
675		goto fail;
676
677	/* Cycle all the channels and clear */
678	for (i = 0; i < solo_dev->nr_chans; i++) {
679		solo_v4l2_set_ch(solo_dev, i);
680		while (erase_off(solo_dev))
681			/* Do nothing */;
682	}
683
684	/* Set the default display channel */
685	solo_v4l2_set_ch(solo_dev, 0);
686	while (erase_off(solo_dev))
687		/* Do nothing */;
688
689	ret = video_register_device(solo_dev->vfd, VFL_TYPE_VIDEO, nr);
690	if (ret < 0)
691		goto fail;
692
693	snprintf(solo_dev->vfd->name, sizeof(solo_dev->vfd->name), "%s (%i)",
694		 SOLO6X10_NAME, solo_dev->vfd->num);
695
696	dev_info(&solo_dev->pdev->dev, "Display as /dev/video%d with %d inputs (%d extended)\n",
697		 solo_dev->vfd->num,
698		 solo_dev->nr_chans, solo_dev->nr_ext);
699
700	return 0;
701
702fail:
703	video_device_release(solo_dev->vfd);
704	v4l2_ctrl_handler_free(&solo_dev->disp_hdl);
705	solo_dev->vfd = NULL;
706	return ret;
707}
708
709void solo_v4l2_exit(struct solo_dev *solo_dev)
710{
711	if (solo_dev->vfd == NULL)
712		return;
713
714	video_unregister_device(solo_dev->vfd);
715	v4l2_ctrl_handler_free(&solo_dev->disp_hdl);
716	solo_dev->vfd = NULL;
717}