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Linux 4.19.133
[linux/fpc-iii.git] / drivers / media / platform / vim2m.c
blob7b8cf661f2386c22c3b95e92794dfadd8975820f
1 /*
2 * A virtual v4l2-mem2mem example device.
3 *
4 * This is a virtual device driver for testing mem-to-mem videobuf framework.
5 * It simulates a device that uses memory buffers for both source and
6 * destination, processes the data and issues an "irq" (simulated by a delayed
7 * workqueue).
8 * The device is capable of multi-instance, multi-buffer-per-transaction
9 * operation (via the mem2mem framework).
10 *
11 * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
12 * Pawel Osciak, <pawel@osciak.com>
13 * Marek Szyprowski, <m.szyprowski@samsung.com>
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by the
17 * Free Software Foundation; either version 2 of the
18 * License, or (at your option) any later version
19 */
20 #include <linux/module.h>
21 #include <linux/delay.h>
22 #include <linux/fs.h>
23 #include <linux/sched.h>
24 #include <linux/slab.h>
25
26 #include <linux/platform_device.h>
27 #include <media/v4l2-mem2mem.h>
28 #include <media/v4l2-device.h>
29 #include <media/v4l2-ioctl.h>
30 #include <media/v4l2-ctrls.h>
31 #include <media/v4l2-event.h>
32 #include <media/videobuf2-vmalloc.h>
33
34 MODULE_DESCRIPTION("Virtual device for mem2mem framework testing");
35 MODULE_AUTHOR("Pawel Osciak, <pawel@osciak.com>");
36 MODULE_LICENSE("GPL");
37 MODULE_VERSION("0.1.1");
38 MODULE_ALIAS("mem2mem_testdev");
39
40 static unsigned debug;
41 module_param(debug, uint, 0644);
42 MODULE_PARM_DESC(debug, "activates debug info");
43
44 #define MIN_W 32
45 #define MIN_H 32
46 #define MAX_W 640
47 #define MAX_H 480
48 #define DIM_ALIGN_MASK 7 /* 8-byte alignment for line length */
49
50 /* Flags that indicate a format can be used for capture/output */
51 #define MEM2MEM_CAPTURE (1 << 0)
52 #define MEM2MEM_OUTPUT (1 << 1)
53
54 #define MEM2MEM_NAME "vim2m"
55
56 /* Per queue */
57 #define MEM2MEM_DEF_NUM_BUFS VIDEO_MAX_FRAME
58 /* In bytes, per queue */
59 #define MEM2MEM_VID_MEM_LIMIT (16 * 1024 * 1024)
60
61 /* Default transaction time in msec */
62 #define MEM2MEM_DEF_TRANSTIME 40
63 #define MEM2MEM_COLOR_STEP (0xff >> 4)
64 #define MEM2MEM_NUM_TILES 8
65
66 /* Flags that indicate processing mode */
67 #define MEM2MEM_HFLIP (1 << 0)
68 #define MEM2MEM_VFLIP (1 << 1)
69
70 #define dprintk(dev, fmt, arg...) \
71 v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
72
73
74 static void vim2m_dev_release(struct device *dev)
75 {}
76
77 static struct platform_device vim2m_pdev = {
78 .name = MEM2MEM_NAME,
79 .dev.release = vim2m_dev_release,
80 };
81
82 struct vim2m_fmt {
83 u32 fourcc;
84 int depth;
85 /* Types the format can be used for */
86 u32 types;
87 };
88
89 static struct vim2m_fmt formats[] = {
90 {
91 .fourcc = V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */
92 .depth = 16,
93 /* Both capture and output format */
94 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
95 },
96 {
97 .fourcc = V4L2_PIX_FMT_YUYV,
98 .depth = 16,
99 /* Output-only format */
100 .types = MEM2MEM_OUTPUT,
101 },
102 };
103
104 #define NUM_FORMATS ARRAY_SIZE(formats)
105
106 /* Per-queue, driver-specific private data */
107 struct vim2m_q_data {
108 unsigned int width;
109 unsigned int height;
110 unsigned int sizeimage;
111 unsigned int sequence;
112 struct vim2m_fmt *fmt;
113 };
114
115 enum {
116 V4L2_M2M_SRC = 0,
117 V4L2_M2M_DST = 1,
118 };
119
120 #define V4L2_CID_TRANS_TIME_MSEC (V4L2_CID_USER_BASE + 0x1000)
121 #define V4L2_CID_TRANS_NUM_BUFS (V4L2_CID_USER_BASE + 0x1001)
122
123 static struct vim2m_fmt *find_format(struct v4l2_format *f)
124 {
125 struct vim2m_fmt *fmt;
126 unsigned int k;
127
128 for (k = 0; k < NUM_FORMATS; k++) {
129 fmt = &formats[k];
130 if (fmt->fourcc == f->fmt.pix.pixelformat)
131 break;
132 }
133
134 if (k == NUM_FORMATS)
135 return NULL;
136
137 return &formats[k];
138 }
139
140 struct vim2m_dev {
141 struct v4l2_device v4l2_dev;
142 struct video_device vfd;
143 #ifdef CONFIG_MEDIA_CONTROLLER
144 struct media_device mdev;
145 #endif
146
147 atomic_t num_inst;
148 struct mutex dev_mutex;
149 spinlock_t irqlock;
150
151 struct delayed_work work_run;
152
153 struct v4l2_m2m_dev *m2m_dev;
154 };
155
156 struct vim2m_ctx {
157 struct v4l2_fh fh;
158 struct vim2m_dev *dev;
159
160 struct v4l2_ctrl_handler hdl;
161
162 /* Processed buffers in this transaction */
163 u8 num_processed;
164
165 /* Transaction length (i.e. how many buffers per transaction) */
166 u32 translen;
167 /* Transaction time (i.e. simulated processing time) in milliseconds */
168 u32 transtime;
169
170 /* Abort requested by m2m */
171 int aborting;
172
173 /* Processing mode */
174 int mode;
175
176 enum v4l2_colorspace colorspace;
177 enum v4l2_ycbcr_encoding ycbcr_enc;
178 enum v4l2_xfer_func xfer_func;
179 enum v4l2_quantization quant;
180
181 /* Source and destination queue data */
182 struct vim2m_q_data q_data[2];
183 };
184
185 static inline struct vim2m_ctx *file2ctx(struct file *file)
186 {
187 return container_of(file->private_data, struct vim2m_ctx, fh);
188 }
189
190 static struct vim2m_q_data *get_q_data(struct vim2m_ctx *ctx,
191 enum v4l2_buf_type type)
192 {
193 switch (type) {
194 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
195 return &ctx->q_data[V4L2_M2M_SRC];
196 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
197 return &ctx->q_data[V4L2_M2M_DST];
198 default:
199 BUG();
200 }
201 return NULL;
202 }
203
204
205 static int device_process(struct vim2m_ctx *ctx,
206 struct vb2_v4l2_buffer *in_vb,
207 struct vb2_v4l2_buffer *out_vb)
208 {
209 struct vim2m_dev *dev = ctx->dev;
210 struct vim2m_q_data *q_data;
211 u8 *p_in, *p_out;
212 int x, y, t, w;
213 int tile_w, bytes_left;
214 int width, height, bytesperline;
215
216 q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
217
218 width = q_data->width;
219 height = q_data->height;
220 bytesperline = (q_data->width * q_data->fmt->depth) >> 3;
221
222 p_in = vb2_plane_vaddr(&in_vb->vb2_buf, 0);
223 p_out = vb2_plane_vaddr(&out_vb->vb2_buf, 0);
224 if (!p_in || !p_out) {
225 v4l2_err(&dev->v4l2_dev,
226 "Acquiring kernel pointers to buffers failed\n");
227 return -EFAULT;
228 }
229
230 if (vb2_plane_size(&in_vb->vb2_buf, 0) >
231 vb2_plane_size(&out_vb->vb2_buf, 0)) {
232 v4l2_err(&dev->v4l2_dev, "Output buffer is too small\n");
233 return -EINVAL;
234 }
235
236 tile_w = (width * (q_data[V4L2_M2M_DST].fmt->depth >> 3))
237 / MEM2MEM_NUM_TILES;
238 bytes_left = bytesperline - tile_w * MEM2MEM_NUM_TILES;
239 w = 0;
240
241 out_vb->sequence =
242 get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE)->sequence++;
243 in_vb->sequence = q_data->sequence++;
244 out_vb->vb2_buf.timestamp = in_vb->vb2_buf.timestamp;
245
246 if (in_vb->flags & V4L2_BUF_FLAG_TIMECODE)
247 out_vb->timecode = in_vb->timecode;
248 out_vb->field = in_vb->field;
249 out_vb->flags = in_vb->flags &
250 (V4L2_BUF_FLAG_TIMECODE |
251 V4L2_BUF_FLAG_KEYFRAME |
252 V4L2_BUF_FLAG_PFRAME |
253 V4L2_BUF_FLAG_BFRAME |
254 V4L2_BUF_FLAG_TSTAMP_SRC_MASK);
255
256 switch (ctx->mode) {
257 case MEM2MEM_HFLIP | MEM2MEM_VFLIP:
258 p_out += bytesperline * height - bytes_left;
259 for (y = 0; y < height; ++y) {
260 for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
261 if (w & 0x1) {
262 for (x = 0; x < tile_w; ++x)
263 *--p_out = *p_in++ +
264 MEM2MEM_COLOR_STEP;
265 } else {
266 for (x = 0; x < tile_w; ++x)
267 *--p_out = *p_in++ -
268 MEM2MEM_COLOR_STEP;
269 }
270 ++w;
271 }
272 p_in += bytes_left;
273 p_out -= bytes_left;
274 }
275 break;
276
277 case MEM2MEM_HFLIP:
278 for (y = 0; y < height; ++y) {
279 p_out += MEM2MEM_NUM_TILES * tile_w;
280 for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
281 if (w & 0x01) {
282 for (x = 0; x < tile_w; ++x)
283 *--p_out = *p_in++ +
284 MEM2MEM_COLOR_STEP;
285 } else {
286 for (x = 0; x < tile_w; ++x)
287 *--p_out = *p_in++ -
288 MEM2MEM_COLOR_STEP;
289 }
290 ++w;
291 }
292 p_in += bytes_left;
293 p_out += bytesperline;
294 }
295 break;
296
297 case MEM2MEM_VFLIP:
298 p_out += bytesperline * (height - 1);
299 for (y = 0; y < height; ++y) {
300 for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
301 if (w & 0x1) {
302 for (x = 0; x < tile_w; ++x)
303 *p_out++ = *p_in++ +
304 MEM2MEM_COLOR_STEP;
305 } else {
306 for (x = 0; x < tile_w; ++x)
307 *p_out++ = *p_in++ -
308 MEM2MEM_COLOR_STEP;
309 }
310 ++w;
311 }
312 p_in += bytes_left;
313 p_out += bytes_left - 2 * bytesperline;
314 }
315 break;
316
317 default:
318 for (y = 0; y < height; ++y) {
319 for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
320 if (w & 0x1) {
321 for (x = 0; x < tile_w; ++x)
322 *p_out++ = *p_in++ +
323 MEM2MEM_COLOR_STEP;
324 } else {
325 for (x = 0; x < tile_w; ++x)
326 *p_out++ = *p_in++ -
327 MEM2MEM_COLOR_STEP;
328 }
329 ++w;
330 }
331 p_in += bytes_left;
332 p_out += bytes_left;
333 }
334 }
335
336 return 0;
337 }
338
339 /*
340 * mem2mem callbacks
341 */
342
343 /*
344 * job_ready() - check whether an instance is ready to be scheduled to run
345 */
346 static int job_ready(void *priv)
347 {
348 struct vim2m_ctx *ctx = priv;
349
350 if (v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx) < ctx->translen
351 || v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx) < ctx->translen) {
352 dprintk(ctx->dev, "Not enough buffers available\n");
353 return 0;
354 }
355
356 return 1;
357 }
358
359 static void job_abort(void *priv)
360 {
361 struct vim2m_ctx *ctx = priv;
362
363 /* Will cancel the transaction in the next interrupt handler */
364 ctx->aborting = 1;
365 }
366
367 /* device_run() - prepares and starts the device
368 *
369 * This simulates all the immediate preparations required before starting
370 * a device. This will be called by the framework when it decides to schedule
371 * a particular instance.
372 */
373 static void device_run(void *priv)
374 {
375 struct vim2m_ctx *ctx = priv;
376 struct vim2m_dev *dev = ctx->dev;
377 struct vb2_v4l2_buffer *src_buf, *dst_buf;
378
379 src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
380 dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
381
382 device_process(ctx, src_buf, dst_buf);
383
384 /* Run delayed work, which simulates a hardware irq */
385 schedule_delayed_work(&dev->work_run, msecs_to_jiffies(ctx->transtime));
386 }
387
388 static void device_work(struct work_struct *w)
389 {
390 struct vim2m_dev *vim2m_dev =
391 container_of(w, struct vim2m_dev, work_run.work);
392 struct vim2m_ctx *curr_ctx;
393 struct vb2_v4l2_buffer *src_vb, *dst_vb;
394 unsigned long flags;
395
396 curr_ctx = v4l2_m2m_get_curr_priv(vim2m_dev->m2m_dev);
397
398 if (NULL == curr_ctx) {
399 pr_err("Instance released before the end of transaction\n");
400 return;
401 }
402
403 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);
404 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);
405
406 curr_ctx->num_processed++;
407
408 spin_lock_irqsave(&vim2m_dev->irqlock, flags);
409 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
410 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
411 spin_unlock_irqrestore(&vim2m_dev->irqlock, flags);
412
413 if (curr_ctx->num_processed == curr_ctx->translen
414 || curr_ctx->aborting) {
415 dprintk(curr_ctx->dev, "Finishing transaction\n");
416 curr_ctx->num_processed = 0;
417 v4l2_m2m_job_finish(vim2m_dev->m2m_dev, curr_ctx->fh.m2m_ctx);
418 } else {
419 device_run(curr_ctx);
420 }
421 }
422
423 /*
424 * video ioctls
425 */
426 static int vidioc_querycap(struct file *file, void *priv,
427 struct v4l2_capability *cap)
428 {
429 strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1);
430 strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1);
431 snprintf(cap->bus_info, sizeof(cap->bus_info),
432 "platform:%s", MEM2MEM_NAME);
433 cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
434 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
435 return 0;
436 }
437
438 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
439 {
440 int i, num;
441 struct vim2m_fmt *fmt;
442
443 num = 0;
444
445 for (i = 0; i < NUM_FORMATS; ++i) {
446 if (formats[i].types & type) {
447 /* index-th format of type type found ? */
448 if (num == f->index)
449 break;
450 /* Correct type but haven't reached our index yet,
451 * just increment per-type index */
452 ++num;
453 }
454 }
455
456 if (i < NUM_FORMATS) {
457 /* Format found */
458 fmt = &formats[i];
459 f->pixelformat = fmt->fourcc;
460 return 0;
461 }
462
463 /* Format not found */
464 return -EINVAL;
465 }
466
467 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
468 struct v4l2_fmtdesc *f)
469 {
470 return enum_fmt(f, MEM2MEM_CAPTURE);
471 }
472
473 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
474 struct v4l2_fmtdesc *f)
475 {
476 return enum_fmt(f, MEM2MEM_OUTPUT);
477 }
478
479 static int vidioc_g_fmt(struct vim2m_ctx *ctx, struct v4l2_format *f)
480 {
481 struct vb2_queue *vq;
482 struct vim2m_q_data *q_data;
483
484 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
485 if (!vq)
486 return -EINVAL;
487
488 q_data = get_q_data(ctx, f->type);
489
490 f->fmt.pix.width = q_data->width;
491 f->fmt.pix.height = q_data->height;
492 f->fmt.pix.field = V4L2_FIELD_NONE;
493 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
494 f->fmt.pix.bytesperline = (q_data->width * q_data->fmt->depth) >> 3;
495 f->fmt.pix.sizeimage = q_data->sizeimage;
496 f->fmt.pix.colorspace = ctx->colorspace;
497 f->fmt.pix.xfer_func = ctx->xfer_func;
498 f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc;
499 f->fmt.pix.quantization = ctx->quant;
500
501 return 0;
502 }
503
504 static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
505 struct v4l2_format *f)
506 {
507 return vidioc_g_fmt(file2ctx(file), f);
508 }
509
510 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
511 struct v4l2_format *f)
512 {
513 return vidioc_g_fmt(file2ctx(file), f);
514 }
515
516 static int vidioc_try_fmt(struct v4l2_format *f, struct vim2m_fmt *fmt)
517 {
518 /* V4L2 specification suggests the driver corrects the format struct
519 * if any of the dimensions is unsupported */
520 if (f->fmt.pix.height < MIN_H)
521 f->fmt.pix.height = MIN_H;
522 else if (f->fmt.pix.height > MAX_H)
523 f->fmt.pix.height = MAX_H;
524
525 if (f->fmt.pix.width < MIN_W)
526 f->fmt.pix.width = MIN_W;
527 else if (f->fmt.pix.width > MAX_W)
528 f->fmt.pix.width = MAX_W;
529
530 f->fmt.pix.width &= ~DIM_ALIGN_MASK;
531 f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
532 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
533 f->fmt.pix.field = V4L2_FIELD_NONE;
534
535 return 0;
536 }
537
538 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
539 struct v4l2_format *f)
540 {
541 struct vim2m_fmt *fmt;
542 struct vim2m_ctx *ctx = file2ctx(file);
543
544 fmt = find_format(f);
545 if (!fmt) {
546 f->fmt.pix.pixelformat = formats[0].fourcc;
547 fmt = find_format(f);
548 }
549 if (!(fmt->types & MEM2MEM_CAPTURE)) {
550 v4l2_err(&ctx->dev->v4l2_dev,
551 "Fourcc format (0x%08x) invalid.\n",
552 f->fmt.pix.pixelformat);
553 return -EINVAL;
554 }
555 f->fmt.pix.colorspace = ctx->colorspace;
556 f->fmt.pix.xfer_func = ctx->xfer_func;
557 f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc;
558 f->fmt.pix.quantization = ctx->quant;
559
560 return vidioc_try_fmt(f, fmt);
561 }
562
563 static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
564 struct v4l2_format *f)
565 {
566 struct vim2m_fmt *fmt;
567 struct vim2m_ctx *ctx = file2ctx(file);
568
569 fmt = find_format(f);
570 if (!fmt) {
571 f->fmt.pix.pixelformat = formats[0].fourcc;
572 fmt = find_format(f);
573 }
574 if (!(fmt->types & MEM2MEM_OUTPUT)) {
575 v4l2_err(&ctx->dev->v4l2_dev,
576 "Fourcc format (0x%08x) invalid.\n",
577 f->fmt.pix.pixelformat);
578 return -EINVAL;
579 }
580 if (!f->fmt.pix.colorspace)
581 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
582
583 return vidioc_try_fmt(f, fmt);
584 }
585
586 static int vidioc_s_fmt(struct vim2m_ctx *ctx, struct v4l2_format *f)
587 {
588 struct vim2m_q_data *q_data;
589 struct vb2_queue *vq;
590
591 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
592 if (!vq)
593 return -EINVAL;
594
595 q_data = get_q_data(ctx, f->type);
596 if (!q_data)
597 return -EINVAL;
598
599 if (vb2_is_busy(vq)) {
600 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
601 return -EBUSY;
602 }
603
604 q_data->fmt = find_format(f);
605 q_data->width = f->fmt.pix.width;
606 q_data->height = f->fmt.pix.height;
607 q_data->sizeimage = q_data->width * q_data->height
608 * q_data->fmt->depth >> 3;
609
610 dprintk(ctx->dev,
611 "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
612 f->type, q_data->width, q_data->height, q_data->fmt->fourcc);
613
614 return 0;
615 }
616
617 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
618 struct v4l2_format *f)
619 {
620 int ret;
621
622 ret = vidioc_try_fmt_vid_cap(file, priv, f);
623 if (ret)
624 return ret;
625
626 return vidioc_s_fmt(file2ctx(file), f);
627 }
628
629 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
630 struct v4l2_format *f)
631 {
632 struct vim2m_ctx *ctx = file2ctx(file);
633 int ret;
634
635 ret = vidioc_try_fmt_vid_out(file, priv, f);
636 if (ret)
637 return ret;
638
639 ret = vidioc_s_fmt(file2ctx(file), f);
640 if (!ret) {
641 ctx->colorspace = f->fmt.pix.colorspace;
642 ctx->xfer_func = f->fmt.pix.xfer_func;
643 ctx->ycbcr_enc = f->fmt.pix.ycbcr_enc;
644 ctx->quant = f->fmt.pix.quantization;
645 }
646 return ret;
647 }
648
649 static int vim2m_s_ctrl(struct v4l2_ctrl *ctrl)
650 {
651 struct vim2m_ctx *ctx =
652 container_of(ctrl->handler, struct vim2m_ctx, hdl);
653
654 switch (ctrl->id) {
655 case V4L2_CID_HFLIP:
656 if (ctrl->val)
657 ctx->mode |= MEM2MEM_HFLIP;
658 else
659 ctx->mode &= ~MEM2MEM_HFLIP;
660 break;
661
662 case V4L2_CID_VFLIP:
663 if (ctrl->val)
664 ctx->mode |= MEM2MEM_VFLIP;
665 else
666 ctx->mode &= ~MEM2MEM_VFLIP;
667 break;
668
669 case V4L2_CID_TRANS_TIME_MSEC:
670 ctx->transtime = ctrl->val;
671 break;
672
673 case V4L2_CID_TRANS_NUM_BUFS:
674 ctx->translen = ctrl->val;
675 break;
676
677 default:
678 v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n");
679 return -EINVAL;
680 }
681
682 return 0;
683 }
684
685 static const struct v4l2_ctrl_ops vim2m_ctrl_ops = {
686 .s_ctrl = vim2m_s_ctrl,
687 };
688
689
690 static const struct v4l2_ioctl_ops vim2m_ioctl_ops = {
691 .vidioc_querycap = vidioc_querycap,
692
693 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
694 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
695 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
696 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
697
698 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
699 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
700 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
701 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
702
703 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
704 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
705 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
706 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
707 .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf,
708 .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
709 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
710
711 .vidioc_streamon = v4l2_m2m_ioctl_streamon,
712 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
713
714 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
715 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
716 };
717
718
719 /*
720 * Queue operations
721 */
722
723 static int vim2m_queue_setup(struct vb2_queue *vq,
724 unsigned int *nbuffers, unsigned int *nplanes,
725 unsigned int sizes[], struct device *alloc_devs[])
726 {
727 struct vim2m_ctx *ctx = vb2_get_drv_priv(vq);
728 struct vim2m_q_data *q_data;
729 unsigned int size, count = *nbuffers;
730
731 q_data = get_q_data(ctx, vq->type);
732
733 size = q_data->width * q_data->height * q_data->fmt->depth >> 3;
734
735 while (size * count > MEM2MEM_VID_MEM_LIMIT)
736 (count)--;
737 *nbuffers = count;
738
739 if (*nplanes)
740 return sizes[0] < size ? -EINVAL : 0;
741
742 *nplanes = 1;
743 sizes[0] = size;
744
745 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
746
747 return 0;
748 }
749
750 static int vim2m_buf_prepare(struct vb2_buffer *vb)
751 {
752 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
753 struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
754 struct vim2m_q_data *q_data;
755
756 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
757
758 q_data = get_q_data(ctx, vb->vb2_queue->type);
759 if (V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
760 if (vbuf->field == V4L2_FIELD_ANY)
761 vbuf->field = V4L2_FIELD_NONE;
762 if (vbuf->field != V4L2_FIELD_NONE) {
763 dprintk(ctx->dev, "%s field isn't supported\n",
764 __func__);
765 return -EINVAL;
766 }
767 }
768
769 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
770 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n",
771 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage);
772 return -EINVAL;
773 }
774
775 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
776
777 return 0;
778 }
779
780 static void vim2m_buf_queue(struct vb2_buffer *vb)
781 {
782 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
783 struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
784
785 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
786 }
787
788 static int vim2m_start_streaming(struct vb2_queue *q, unsigned count)
789 {
790 struct vim2m_ctx *ctx = vb2_get_drv_priv(q);
791 struct vim2m_q_data *q_data = get_q_data(ctx, q->type);
792
793 q_data->sequence = 0;
794 return 0;
795 }
796
797 static void vim2m_stop_streaming(struct vb2_queue *q)
798 {
799 struct vim2m_ctx *ctx = vb2_get_drv_priv(q);
800 struct vim2m_dev *dev = ctx->dev;
801 struct vb2_v4l2_buffer *vbuf;
802 unsigned long flags;
803
804 if (v4l2_m2m_get_curr_priv(dev->m2m_dev) == ctx)
805 cancel_delayed_work_sync(&dev->work_run);
806
807 for (;;) {
808 if (V4L2_TYPE_IS_OUTPUT(q->type))
809 vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
810 else
811 vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
812 if (vbuf == NULL)
813 return;
814 spin_lock_irqsave(&ctx->dev->irqlock, flags);
815 v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
816 spin_unlock_irqrestore(&ctx->dev->irqlock, flags);
817 }
818 }
819
820 static const struct vb2_ops vim2m_qops = {
821 .queue_setup = vim2m_queue_setup,
822 .buf_prepare = vim2m_buf_prepare,
823 .buf_queue = vim2m_buf_queue,
824 .start_streaming = vim2m_start_streaming,
825 .stop_streaming = vim2m_stop_streaming,
826 .wait_prepare = vb2_ops_wait_prepare,
827 .wait_finish = vb2_ops_wait_finish,
828 };
829
830 static int queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
831 {
832 struct vim2m_ctx *ctx = priv;
833 int ret;
834
835 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
836 src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
837 src_vq->drv_priv = ctx;
838 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
839 src_vq->ops = &vim2m_qops;
840 src_vq->mem_ops = &vb2_vmalloc_memops;
841 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
842 src_vq->lock = &ctx->dev->dev_mutex;
843
844 ret = vb2_queue_init(src_vq);
845 if (ret)
846 return ret;
847
848 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
849 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
850 dst_vq->drv_priv = ctx;
851 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
852 dst_vq->ops = &vim2m_qops;
853 dst_vq->mem_ops = &vb2_vmalloc_memops;
854 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
855 dst_vq->lock = &ctx->dev->dev_mutex;
856
857 return vb2_queue_init(dst_vq);
858 }
859
860 static const struct v4l2_ctrl_config vim2m_ctrl_trans_time_msec = {
861 .ops = &vim2m_ctrl_ops,
862 .id = V4L2_CID_TRANS_TIME_MSEC,
863 .name = "Transaction Time (msec)",
864 .type = V4L2_CTRL_TYPE_INTEGER,
865 .def = MEM2MEM_DEF_TRANSTIME,
866 .min = 1,
867 .max = 10001,
868 .step = 1,
869 };
870
871 static const struct v4l2_ctrl_config vim2m_ctrl_trans_num_bufs = {
872 .ops = &vim2m_ctrl_ops,
873 .id = V4L2_CID_TRANS_NUM_BUFS,
874 .name = "Buffers Per Transaction",
875 .type = V4L2_CTRL_TYPE_INTEGER,
876 .def = 1,
877 .min = 1,
878 .max = MEM2MEM_DEF_NUM_BUFS,
879 .step = 1,
880 };
881
882 /*
883 * File operations
884 */
885 static int vim2m_open(struct file *file)
886 {
887 struct vim2m_dev *dev = video_drvdata(file);
888 struct vim2m_ctx *ctx = NULL;
889 struct v4l2_ctrl_handler *hdl;
890 int rc = 0;
891
892 if (mutex_lock_interruptible(&dev->dev_mutex))
893 return -ERESTARTSYS;
894 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
895 if (!ctx) {
896 rc = -ENOMEM;
897 goto open_unlock;
898 }
899
900 v4l2_fh_init(&ctx->fh, video_devdata(file));
901 file->private_data = &ctx->fh;
902 ctx->dev = dev;
903 hdl = &ctx->hdl;
904 v4l2_ctrl_handler_init(hdl, 4);
905 v4l2_ctrl_new_std(hdl, &vim2m_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
906 v4l2_ctrl_new_std(hdl, &vim2m_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
907 v4l2_ctrl_new_custom(hdl, &vim2m_ctrl_trans_time_msec, NULL);
908 v4l2_ctrl_new_custom(hdl, &vim2m_ctrl_trans_num_bufs, NULL);
909 if (hdl->error) {
910 rc = hdl->error;
911 v4l2_ctrl_handler_free(hdl);
912 kfree(ctx);
913 goto open_unlock;
914 }
915 ctx->fh.ctrl_handler = hdl;
916 v4l2_ctrl_handler_setup(hdl);
917
918 ctx->q_data[V4L2_M2M_SRC].fmt = &formats[0];
919 ctx->q_data[V4L2_M2M_SRC].width = 640;
920 ctx->q_data[V4L2_M2M_SRC].height = 480;
921 ctx->q_data[V4L2_M2M_SRC].sizeimage =
922 ctx->q_data[V4L2_M2M_SRC].width *
923 ctx->q_data[V4L2_M2M_SRC].height *
924 (ctx->q_data[V4L2_M2M_SRC].fmt->depth >> 3);
925 ctx->q_data[V4L2_M2M_DST] = ctx->q_data[V4L2_M2M_SRC];
926 ctx->colorspace = V4L2_COLORSPACE_REC709;
927
928 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);
929
930 if (IS_ERR(ctx->fh.m2m_ctx)) {
931 rc = PTR_ERR(ctx->fh.m2m_ctx);
932
933 v4l2_ctrl_handler_free(hdl);
934 v4l2_fh_exit(&ctx->fh);
935 kfree(ctx);
936 goto open_unlock;
937 }
938
939 v4l2_fh_add(&ctx->fh);
940 atomic_inc(&dev->num_inst);
941
942 dprintk(dev, "Created instance: %p, m2m_ctx: %p\n",
943 ctx, ctx->fh.m2m_ctx);
944
945 open_unlock:
946 mutex_unlock(&dev->dev_mutex);
947 return rc;
948 }
949
950 static int vim2m_release(struct file *file)
951 {
952 struct vim2m_dev *dev = video_drvdata(file);
953 struct vim2m_ctx *ctx = file2ctx(file);
954
955 dprintk(dev, "Releasing instance %p\n", ctx);
956
957 v4l2_fh_del(&ctx->fh);
958 v4l2_fh_exit(&ctx->fh);
959 v4l2_ctrl_handler_free(&ctx->hdl);
960 mutex_lock(&dev->dev_mutex);
961 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
962 mutex_unlock(&dev->dev_mutex);
963 kfree(ctx);
964
965 atomic_dec(&dev->num_inst);
966
967 return 0;
968 }
969
970 static const struct v4l2_file_operations vim2m_fops = {
971 .owner = THIS_MODULE,
972 .open = vim2m_open,
973 .release = vim2m_release,
974 .poll = v4l2_m2m_fop_poll,
975 .unlocked_ioctl = video_ioctl2,
976 .mmap = v4l2_m2m_fop_mmap,
977 };
978
979 static const struct video_device vim2m_videodev = {
980 .name = MEM2MEM_NAME,
981 .vfl_dir = VFL_DIR_M2M,
982 .fops = &vim2m_fops,
983 .ioctl_ops = &vim2m_ioctl_ops,
984 .minor = -1,
985 .release = video_device_release_empty,
986 };
987
988 static const struct v4l2_m2m_ops m2m_ops = {
989 .device_run = device_run,
990 .job_ready = job_ready,
991 .job_abort = job_abort,
992 };
993
994 static int vim2m_probe(struct platform_device *pdev)
995 {
996 struct vim2m_dev *dev;
997 struct video_device *vfd;
998 int ret;
999
1000 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
1001 if (!dev)
1002 return -ENOMEM;
1003
1004 spin_lock_init(&dev->irqlock);
1005
1006 ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
1007 if (ret)
1008 return ret;
1009
1010 atomic_set(&dev->num_inst, 0);
1011 mutex_init(&dev->dev_mutex);
1012
1013 dev->vfd = vim2m_videodev;
1014 vfd = &dev->vfd;
1015 vfd->lock = &dev->dev_mutex;
1016 vfd->v4l2_dev = &dev->v4l2_dev;
1017 INIT_DELAYED_WORK(&dev->work_run, device_work);
1018
1019 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
1020 if (ret) {
1021 v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
1022 goto unreg_v4l2;
1023 }
1024
1025 video_set_drvdata(vfd, dev);
1026 v4l2_info(&dev->v4l2_dev,
1027 "Device registered as /dev/video%d\n", vfd->num);
1028
1029 platform_set_drvdata(pdev, dev);
1030
1031 dev->m2m_dev = v4l2_m2m_init(&m2m_ops);
1032 if (IS_ERR(dev->m2m_dev)) {
1033 v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
1034 ret = PTR_ERR(dev->m2m_dev);
1035 goto unreg_dev;
1036 }
1037
1038 #ifdef CONFIG_MEDIA_CONTROLLER
1039 dev->mdev.dev = &pdev->dev;
1040 strlcpy(dev->mdev.model, "vim2m", sizeof(dev->mdev.model));
1041 media_device_init(&dev->mdev);
1042 dev->v4l2_dev.mdev = &dev->mdev;
1043
1044 ret = v4l2_m2m_register_media_controller(dev->m2m_dev,
1045 vfd, MEDIA_ENT_F_PROC_VIDEO_SCALER);
1046 if (ret) {
1047 v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller\n");
1048 goto unreg_m2m;
1049 }
1050
1051 ret = media_device_register(&dev->mdev);
1052 if (ret) {
1053 v4l2_err(&dev->v4l2_dev, "Failed to register mem2mem media device\n");
1054 goto unreg_m2m_mc;
1055 }
1056 #endif
1057 return 0;
1058
1059 #ifdef CONFIG_MEDIA_CONTROLLER
1060 unreg_m2m_mc:
1061 v4l2_m2m_unregister_media_controller(dev->m2m_dev);
1062 unreg_m2m:
1063 v4l2_m2m_release(dev->m2m_dev);
1064 #endif
1065 unreg_dev:
1066 video_unregister_device(&dev->vfd);
1067 unreg_v4l2:
1068 v4l2_device_unregister(&dev->v4l2_dev);
1069
1070 return ret;
1071 }
1072
1073 static int vim2m_remove(struct platform_device *pdev)
1074 {
1075 struct vim2m_dev *dev = platform_get_drvdata(pdev);
1076
1077 v4l2_info(&dev->v4l2_dev, "Removing " MEM2MEM_NAME);
1078
1079 #ifdef CONFIG_MEDIA_CONTROLLER
1080 media_device_unregister(&dev->mdev);
1081 v4l2_m2m_unregister_media_controller(dev->m2m_dev);
1082 media_device_cleanup(&dev->mdev);
1083 #endif
1084 v4l2_m2m_release(dev->m2m_dev);
1085 video_unregister_device(&dev->vfd);
1086 v4l2_device_unregister(&dev->v4l2_dev);
1087
1088 return 0;
1089 }
1090
1091 static struct platform_driver vim2m_pdrv = {
1092 .probe = vim2m_probe,
1093 .remove = vim2m_remove,
1094 .driver = {
1095 .name = MEM2MEM_NAME,
1096 },
1097 };
1098
1099 static void __exit vim2m_exit(void)
1100 {
1101 platform_driver_unregister(&vim2m_pdrv);
1102 platform_device_unregister(&vim2m_pdev);
1103 }
1104
1105 static int __init vim2m_init(void)
1106 {
1107 int ret;
1108
1109 ret = platform_device_register(&vim2m_pdev);
1110 if (ret)
1111 return ret;
1112
1113 ret = platform_driver_register(&vim2m_pdrv);
1114 if (ret)
1115 platform_device_unregister(&vim2m_pdev);
1116
1117 return ret;
1118 }
1119
1120 module_init(vim2m_init);
1121 module_exit(vim2m_exit);
Linux with added FPC-III support