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perf bpf: Move perf_event_output() from stdio.h to bpf.h
[linux/fpc-iii.git] / drivers / media / platform / vim2m.c
blobd82db738f174ef048d663d366b4950cd732c2b43
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 /* Apply request controls if any */
383 v4l2_ctrl_request_setup(src_buf->vb2_buf.req_obj.req,
384 &ctx->hdl);
385
386 device_process(ctx, src_buf, dst_buf);
387
388 /* Complete request controls if any */
389 v4l2_ctrl_request_complete(src_buf->vb2_buf.req_obj.req,
390 &ctx->hdl);
391
392 /* Run delayed work, which simulates a hardware irq */
393 schedule_delayed_work(&dev->work_run, msecs_to_jiffies(ctx->transtime));
394 }
395
396 static void device_work(struct work_struct *w)
397 {
398 struct vim2m_dev *vim2m_dev =
399 container_of(w, struct vim2m_dev, work_run.work);
400 struct vim2m_ctx *curr_ctx;
401 struct vb2_v4l2_buffer *src_vb, *dst_vb;
402 unsigned long flags;
403
404 curr_ctx = v4l2_m2m_get_curr_priv(vim2m_dev->m2m_dev);
405
406 if (NULL == curr_ctx) {
407 pr_err("Instance released before the end of transaction\n");
408 return;
409 }
410
411 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);
412 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);
413
414 curr_ctx->num_processed++;
415
416 spin_lock_irqsave(&vim2m_dev->irqlock, flags);
417 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
418 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
419 spin_unlock_irqrestore(&vim2m_dev->irqlock, flags);
420
421 if (curr_ctx->num_processed == curr_ctx->translen
422 || curr_ctx->aborting) {
423 dprintk(curr_ctx->dev, "Finishing transaction\n");
424 curr_ctx->num_processed = 0;
425 v4l2_m2m_job_finish(vim2m_dev->m2m_dev, curr_ctx->fh.m2m_ctx);
426 } else {
427 device_run(curr_ctx);
428 }
429 }
430
431 /*
432 * video ioctls
433 */
434 static int vidioc_querycap(struct file *file, void *priv,
435 struct v4l2_capability *cap)
436 {
437 strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1);
438 strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1);
439 snprintf(cap->bus_info, sizeof(cap->bus_info),
440 "platform:%s", MEM2MEM_NAME);
441 cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
442 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
443 return 0;
444 }
445
446 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
447 {
448 int i, num;
449 struct vim2m_fmt *fmt;
450
451 num = 0;
452
453 for (i = 0; i < NUM_FORMATS; ++i) {
454 if (formats[i].types & type) {
455 /* index-th format of type type found ? */
456 if (num == f->index)
457 break;
458 /* Correct type but haven't reached our index yet,
459 * just increment per-type index */
460 ++num;
461 }
462 }
463
464 if (i < NUM_FORMATS) {
465 /* Format found */
466 fmt = &formats[i];
467 f->pixelformat = fmt->fourcc;
468 return 0;
469 }
470
471 /* Format not found */
472 return -EINVAL;
473 }
474
475 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
476 struct v4l2_fmtdesc *f)
477 {
478 return enum_fmt(f, MEM2MEM_CAPTURE);
479 }
480
481 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
482 struct v4l2_fmtdesc *f)
483 {
484 return enum_fmt(f, MEM2MEM_OUTPUT);
485 }
486
487 static int vidioc_g_fmt(struct vim2m_ctx *ctx, struct v4l2_format *f)
488 {
489 struct vb2_queue *vq;
490 struct vim2m_q_data *q_data;
491
492 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
493 if (!vq)
494 return -EINVAL;
495
496 q_data = get_q_data(ctx, f->type);
497
498 f->fmt.pix.width = q_data->width;
499 f->fmt.pix.height = q_data->height;
500 f->fmt.pix.field = V4L2_FIELD_NONE;
501 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
502 f->fmt.pix.bytesperline = (q_data->width * q_data->fmt->depth) >> 3;
503 f->fmt.pix.sizeimage = q_data->sizeimage;
504 f->fmt.pix.colorspace = ctx->colorspace;
505 f->fmt.pix.xfer_func = ctx->xfer_func;
506 f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc;
507 f->fmt.pix.quantization = ctx->quant;
508
509 return 0;
510 }
511
512 static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
513 struct v4l2_format *f)
514 {
515 return vidioc_g_fmt(file2ctx(file), f);
516 }
517
518 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
519 struct v4l2_format *f)
520 {
521 return vidioc_g_fmt(file2ctx(file), f);
522 }
523
524 static int vidioc_try_fmt(struct v4l2_format *f, struct vim2m_fmt *fmt)
525 {
526 /* V4L2 specification suggests the driver corrects the format struct
527 * if any of the dimensions is unsupported */
528 if (f->fmt.pix.height < MIN_H)
529 f->fmt.pix.height = MIN_H;
530 else if (f->fmt.pix.height > MAX_H)
531 f->fmt.pix.height = MAX_H;
532
533 if (f->fmt.pix.width < MIN_W)
534 f->fmt.pix.width = MIN_W;
535 else if (f->fmt.pix.width > MAX_W)
536 f->fmt.pix.width = MAX_W;
537
538 f->fmt.pix.width &= ~DIM_ALIGN_MASK;
539 f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
540 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
541 f->fmt.pix.field = V4L2_FIELD_NONE;
542
543 return 0;
544 }
545
546 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
547 struct v4l2_format *f)
548 {
549 struct vim2m_fmt *fmt;
550 struct vim2m_ctx *ctx = file2ctx(file);
551
552 fmt = find_format(f);
553 if (!fmt) {
554 f->fmt.pix.pixelformat = formats[0].fourcc;
555 fmt = find_format(f);
556 }
557 if (!(fmt->types & MEM2MEM_CAPTURE)) {
558 v4l2_err(&ctx->dev->v4l2_dev,
559 "Fourcc format (0x%08x) invalid.\n",
560 f->fmt.pix.pixelformat);
561 return -EINVAL;
562 }
563 f->fmt.pix.colorspace = ctx->colorspace;
564 f->fmt.pix.xfer_func = ctx->xfer_func;
565 f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc;
566 f->fmt.pix.quantization = ctx->quant;
567
568 return vidioc_try_fmt(f, fmt);
569 }
570
571 static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
572 struct v4l2_format *f)
573 {
574 struct vim2m_fmt *fmt;
575 struct vim2m_ctx *ctx = file2ctx(file);
576
577 fmt = find_format(f);
578 if (!fmt) {
579 f->fmt.pix.pixelformat = formats[0].fourcc;
580 fmt = find_format(f);
581 }
582 if (!(fmt->types & MEM2MEM_OUTPUT)) {
583 v4l2_err(&ctx->dev->v4l2_dev,
584 "Fourcc format (0x%08x) invalid.\n",
585 f->fmt.pix.pixelformat);
586 return -EINVAL;
587 }
588 if (!f->fmt.pix.colorspace)
589 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
590
591 return vidioc_try_fmt(f, fmt);
592 }
593
594 static int vidioc_s_fmt(struct vim2m_ctx *ctx, struct v4l2_format *f)
595 {
596 struct vim2m_q_data *q_data;
597 struct vb2_queue *vq;
598
599 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
600 if (!vq)
601 return -EINVAL;
602
603 q_data = get_q_data(ctx, f->type);
604 if (!q_data)
605 return -EINVAL;
606
607 if (vb2_is_busy(vq)) {
608 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
609 return -EBUSY;
610 }
611
612 q_data->fmt = find_format(f);
613 q_data->width = f->fmt.pix.width;
614 q_data->height = f->fmt.pix.height;
615 q_data->sizeimage = q_data->width * q_data->height
616 * q_data->fmt->depth >> 3;
617
618 dprintk(ctx->dev,
619 "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
620 f->type, q_data->width, q_data->height, q_data->fmt->fourcc);
621
622 return 0;
623 }
624
625 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
626 struct v4l2_format *f)
627 {
628 int ret;
629
630 ret = vidioc_try_fmt_vid_cap(file, priv, f);
631 if (ret)
632 return ret;
633
634 return vidioc_s_fmt(file2ctx(file), f);
635 }
636
637 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
638 struct v4l2_format *f)
639 {
640 struct vim2m_ctx *ctx = file2ctx(file);
641 int ret;
642
643 ret = vidioc_try_fmt_vid_out(file, priv, f);
644 if (ret)
645 return ret;
646
647 ret = vidioc_s_fmt(file2ctx(file), f);
648 if (!ret) {
649 ctx->colorspace = f->fmt.pix.colorspace;
650 ctx->xfer_func = f->fmt.pix.xfer_func;
651 ctx->ycbcr_enc = f->fmt.pix.ycbcr_enc;
652 ctx->quant = f->fmt.pix.quantization;
653 }
654 return ret;
655 }
656
657 static int vim2m_s_ctrl(struct v4l2_ctrl *ctrl)
658 {
659 struct vim2m_ctx *ctx =
660 container_of(ctrl->handler, struct vim2m_ctx, hdl);
661
662 switch (ctrl->id) {
663 case V4L2_CID_HFLIP:
664 if (ctrl->val)
665 ctx->mode |= MEM2MEM_HFLIP;
666 else
667 ctx->mode &= ~MEM2MEM_HFLIP;
668 break;
669
670 case V4L2_CID_VFLIP:
671 if (ctrl->val)
672 ctx->mode |= MEM2MEM_VFLIP;
673 else
674 ctx->mode &= ~MEM2MEM_VFLIP;
675 break;
676
677 case V4L2_CID_TRANS_TIME_MSEC:
678 ctx->transtime = ctrl->val;
679 break;
680
681 case V4L2_CID_TRANS_NUM_BUFS:
682 ctx->translen = ctrl->val;
683 break;
684
685 default:
686 v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n");
687 return -EINVAL;
688 }
689
690 return 0;
691 }
692
693 static const struct v4l2_ctrl_ops vim2m_ctrl_ops = {
694 .s_ctrl = vim2m_s_ctrl,
695 };
696
697
698 static const struct v4l2_ioctl_ops vim2m_ioctl_ops = {
699 .vidioc_querycap = vidioc_querycap,
700
701 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
702 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
703 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
704 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
705
706 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
707 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
708 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
709 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
710
711 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
712 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
713 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
714 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
715 .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf,
716 .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
717 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
718
719 .vidioc_streamon = v4l2_m2m_ioctl_streamon,
720 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
721
722 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
723 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
724 };
725
726
727 /*
728 * Queue operations
729 */
730
731 static int vim2m_queue_setup(struct vb2_queue *vq,
732 unsigned int *nbuffers, unsigned int *nplanes,
733 unsigned int sizes[], struct device *alloc_devs[])
734 {
735 struct vim2m_ctx *ctx = vb2_get_drv_priv(vq);
736 struct vim2m_q_data *q_data;
737 unsigned int size, count = *nbuffers;
738
739 q_data = get_q_data(ctx, vq->type);
740
741 size = q_data->width * q_data->height * q_data->fmt->depth >> 3;
742
743 while (size * count > MEM2MEM_VID_MEM_LIMIT)
744 (count)--;
745 *nbuffers = count;
746
747 if (*nplanes)
748 return sizes[0] < size ? -EINVAL : 0;
749
750 *nplanes = 1;
751 sizes[0] = size;
752
753 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
754
755 return 0;
756 }
757
758 static int vim2m_buf_prepare(struct vb2_buffer *vb)
759 {
760 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
761 struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
762 struct vim2m_q_data *q_data;
763
764 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
765
766 q_data = get_q_data(ctx, vb->vb2_queue->type);
767 if (V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
768 if (vbuf->field == V4L2_FIELD_ANY)
769 vbuf->field = V4L2_FIELD_NONE;
770 if (vbuf->field != V4L2_FIELD_NONE) {
771 dprintk(ctx->dev, "%s field isn't supported\n",
772 __func__);
773 return -EINVAL;
774 }
775 }
776
777 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
778 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n",
779 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage);
780 return -EINVAL;
781 }
782
783 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
784
785 return 0;
786 }
787
788 static void vim2m_buf_queue(struct vb2_buffer *vb)
789 {
790 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
791 struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
792
793 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
794 }
795
796 static int vim2m_start_streaming(struct vb2_queue *q, unsigned count)
797 {
798 struct vim2m_ctx *ctx = vb2_get_drv_priv(q);
799 struct vim2m_q_data *q_data = get_q_data(ctx, q->type);
800
801 q_data->sequence = 0;
802 return 0;
803 }
804
805 static void vim2m_stop_streaming(struct vb2_queue *q)
806 {
807 struct vim2m_ctx *ctx = vb2_get_drv_priv(q);
808 struct vb2_v4l2_buffer *vbuf;
809 unsigned long flags;
810
811 flush_scheduled_work();
812 for (;;) {
813 if (V4L2_TYPE_IS_OUTPUT(q->type))
814 vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
815 else
816 vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
817 if (vbuf == NULL)
818 return;
819 v4l2_ctrl_request_complete(vbuf->vb2_buf.req_obj.req,
820 &ctx->hdl);
821 spin_lock_irqsave(&ctx->dev->irqlock, flags);
822 v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
823 spin_unlock_irqrestore(&ctx->dev->irqlock, flags);
824 }
825 }
826
827 static void vim2m_buf_request_complete(struct vb2_buffer *vb)
828 {
829 struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
830
831 v4l2_ctrl_request_complete(vb->req_obj.req, &ctx->hdl);
832 }
833
834 static const struct vb2_ops vim2m_qops = {
835 .queue_setup = vim2m_queue_setup,
836 .buf_prepare = vim2m_buf_prepare,
837 .buf_queue = vim2m_buf_queue,
838 .start_streaming = vim2m_start_streaming,
839 .stop_streaming = vim2m_stop_streaming,
840 .wait_prepare = vb2_ops_wait_prepare,
841 .wait_finish = vb2_ops_wait_finish,
842 .buf_request_complete = vim2m_buf_request_complete,
843 };
844
845 static int queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
846 {
847 struct vim2m_ctx *ctx = priv;
848 int ret;
849
850 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
851 src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
852 src_vq->drv_priv = ctx;
853 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
854 src_vq->ops = &vim2m_qops;
855 src_vq->mem_ops = &vb2_vmalloc_memops;
856 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
857 src_vq->lock = &ctx->dev->dev_mutex;
858 src_vq->supports_requests = true;
859
860 ret = vb2_queue_init(src_vq);
861 if (ret)
862 return ret;
863
864 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
865 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
866 dst_vq->drv_priv = ctx;
867 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
868 dst_vq->ops = &vim2m_qops;
869 dst_vq->mem_ops = &vb2_vmalloc_memops;
870 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
871 dst_vq->lock = &ctx->dev->dev_mutex;
872
873 return vb2_queue_init(dst_vq);
874 }
875
876 static const struct v4l2_ctrl_config vim2m_ctrl_trans_time_msec = {
877 .ops = &vim2m_ctrl_ops,
878 .id = V4L2_CID_TRANS_TIME_MSEC,
879 .name = "Transaction Time (msec)",
880 .type = V4L2_CTRL_TYPE_INTEGER,
881 .def = MEM2MEM_DEF_TRANSTIME,
882 .min = 1,
883 .max = 10001,
884 .step = 1,
885 };
886
887 static const struct v4l2_ctrl_config vim2m_ctrl_trans_num_bufs = {
888 .ops = &vim2m_ctrl_ops,
889 .id = V4L2_CID_TRANS_NUM_BUFS,
890 .name = "Buffers Per Transaction",
891 .type = V4L2_CTRL_TYPE_INTEGER,
892 .def = 1,
893 .min = 1,
894 .max = MEM2MEM_DEF_NUM_BUFS,
895 .step = 1,
896 };
897
898 /*
899 * File operations
900 */
901 static int vim2m_open(struct file *file)
902 {
903 struct vim2m_dev *dev = video_drvdata(file);
904 struct vim2m_ctx *ctx = NULL;
905 struct v4l2_ctrl_handler *hdl;
906 int rc = 0;
907
908 if (mutex_lock_interruptible(&dev->dev_mutex))
909 return -ERESTARTSYS;
910 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
911 if (!ctx) {
912 rc = -ENOMEM;
913 goto open_unlock;
914 }
915
916 v4l2_fh_init(&ctx->fh, video_devdata(file));
917 file->private_data = &ctx->fh;
918 ctx->dev = dev;
919 hdl = &ctx->hdl;
920 v4l2_ctrl_handler_init(hdl, 4);
921 v4l2_ctrl_new_std(hdl, &vim2m_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
922 v4l2_ctrl_new_std(hdl, &vim2m_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
923 v4l2_ctrl_new_custom(hdl, &vim2m_ctrl_trans_time_msec, NULL);
924 v4l2_ctrl_new_custom(hdl, &vim2m_ctrl_trans_num_bufs, NULL);
925 if (hdl->error) {
926 rc = hdl->error;
927 v4l2_ctrl_handler_free(hdl);
928 kfree(ctx);
929 goto open_unlock;
930 }
931 ctx->fh.ctrl_handler = hdl;
932 v4l2_ctrl_handler_setup(hdl);
933
934 ctx->q_data[V4L2_M2M_SRC].fmt = &formats[0];
935 ctx->q_data[V4L2_M2M_SRC].width = 640;
936 ctx->q_data[V4L2_M2M_SRC].height = 480;
937 ctx->q_data[V4L2_M2M_SRC].sizeimage =
938 ctx->q_data[V4L2_M2M_SRC].width *
939 ctx->q_data[V4L2_M2M_SRC].height *
940 (ctx->q_data[V4L2_M2M_SRC].fmt->depth >> 3);
941 ctx->q_data[V4L2_M2M_DST] = ctx->q_data[V4L2_M2M_SRC];
942 ctx->colorspace = V4L2_COLORSPACE_REC709;
943
944 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);
945
946 if (IS_ERR(ctx->fh.m2m_ctx)) {
947 rc = PTR_ERR(ctx->fh.m2m_ctx);
948
949 v4l2_ctrl_handler_free(hdl);
950 v4l2_fh_exit(&ctx->fh);
951 kfree(ctx);
952 goto open_unlock;
953 }
954
955 v4l2_fh_add(&ctx->fh);
956 atomic_inc(&dev->num_inst);
957
958 dprintk(dev, "Created instance: %p, m2m_ctx: %p\n",
959 ctx, ctx->fh.m2m_ctx);
960
961 open_unlock:
962 mutex_unlock(&dev->dev_mutex);
963 return rc;
964 }
965
966 static int vim2m_release(struct file *file)
967 {
968 struct vim2m_dev *dev = video_drvdata(file);
969 struct vim2m_ctx *ctx = file2ctx(file);
970
971 dprintk(dev, "Releasing instance %p\n", ctx);
972
973 v4l2_fh_del(&ctx->fh);
974 v4l2_fh_exit(&ctx->fh);
975 v4l2_ctrl_handler_free(&ctx->hdl);
976 mutex_lock(&dev->dev_mutex);
977 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
978 mutex_unlock(&dev->dev_mutex);
979 kfree(ctx);
980
981 atomic_dec(&dev->num_inst);
982
983 return 0;
984 }
985
986 static const struct v4l2_file_operations vim2m_fops = {
987 .owner = THIS_MODULE,
988 .open = vim2m_open,
989 .release = vim2m_release,
990 .poll = v4l2_m2m_fop_poll,
991 .unlocked_ioctl = video_ioctl2,
992 .mmap = v4l2_m2m_fop_mmap,
993 };
994
995 static const struct video_device vim2m_videodev = {
996 .name = MEM2MEM_NAME,
997 .vfl_dir = VFL_DIR_M2M,
998 .fops = &vim2m_fops,
999 .ioctl_ops = &vim2m_ioctl_ops,
1000 .minor = -1,
1001 .release = video_device_release_empty,
1002 };
1003
1004 static const struct v4l2_m2m_ops m2m_ops = {
1005 .device_run = device_run,
1006 .job_ready = job_ready,
1007 .job_abort = job_abort,
1008 };
1009
1010 static const struct media_device_ops m2m_media_ops = {
1011 .req_validate = vb2_request_validate,
1012 .req_queue = v4l2_m2m_request_queue,
1013 };
1014
1015 static int vim2m_probe(struct platform_device *pdev)
1016 {
1017 struct vim2m_dev *dev;
1018 struct video_device *vfd;
1019 int ret;
1020
1021 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
1022 if (!dev)
1023 return -ENOMEM;
1024
1025 spin_lock_init(&dev->irqlock);
1026
1027 ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
1028 if (ret)
1029 return ret;
1030
1031 atomic_set(&dev->num_inst, 0);
1032 mutex_init(&dev->dev_mutex);
1033
1034 dev->vfd = vim2m_videodev;
1035 vfd = &dev->vfd;
1036 vfd->lock = &dev->dev_mutex;
1037 vfd->v4l2_dev = &dev->v4l2_dev;
1038 INIT_DELAYED_WORK(&dev->work_run, device_work);
1039
1040 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
1041 if (ret) {
1042 v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
1043 goto unreg_v4l2;
1044 }
1045
1046 video_set_drvdata(vfd, dev);
1047 v4l2_info(&dev->v4l2_dev,
1048 "Device registered as /dev/video%d\n", vfd->num);
1049
1050 platform_set_drvdata(pdev, dev);
1051
1052 dev->m2m_dev = v4l2_m2m_init(&m2m_ops);
1053 if (IS_ERR(dev->m2m_dev)) {
1054 v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
1055 ret = PTR_ERR(dev->m2m_dev);
1056 goto unreg_dev;
1057 }
1058
1059 #ifdef CONFIG_MEDIA_CONTROLLER
1060 dev->mdev.dev = &pdev->dev;
1061 strscpy(dev->mdev.model, "vim2m", sizeof(dev->mdev.model));
1062 media_device_init(&dev->mdev);
1063 dev->mdev.ops = &m2m_media_ops;
1064 dev->v4l2_dev.mdev = &dev->mdev;
1065
1066 ret = v4l2_m2m_register_media_controller(dev->m2m_dev,
1067 vfd, MEDIA_ENT_F_PROC_VIDEO_SCALER);
1068 if (ret) {
1069 v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller\n");
1070 goto unreg_m2m;
1071 }
1072
1073 ret = media_device_register(&dev->mdev);
1074 if (ret) {
1075 v4l2_err(&dev->v4l2_dev, "Failed to register mem2mem media device\n");
1076 goto unreg_m2m_mc;
1077 }
1078 #endif
1079 return 0;
1080
1081 #ifdef CONFIG_MEDIA_CONTROLLER
1082 unreg_m2m_mc:
1083 v4l2_m2m_unregister_media_controller(dev->m2m_dev);
1084 unreg_m2m:
1085 v4l2_m2m_release(dev->m2m_dev);
1086 #endif
1087 unreg_dev:
1088 video_unregister_device(&dev->vfd);
1089 unreg_v4l2:
1090 v4l2_device_unregister(&dev->v4l2_dev);
1091
1092 return ret;
1093 }
1094
1095 static int vim2m_remove(struct platform_device *pdev)
1096 {
1097 struct vim2m_dev *dev = platform_get_drvdata(pdev);
1098
1099 v4l2_info(&dev->v4l2_dev, "Removing " MEM2MEM_NAME);
1100
1101 #ifdef CONFIG_MEDIA_CONTROLLER
1102 media_device_unregister(&dev->mdev);
1103 v4l2_m2m_unregister_media_controller(dev->m2m_dev);
1104 media_device_cleanup(&dev->mdev);
1105 #endif
1106 v4l2_m2m_release(dev->m2m_dev);
1107 video_unregister_device(&dev->vfd);
1108 v4l2_device_unregister(&dev->v4l2_dev);
1109
1110 return 0;
1111 }
1112
1113 static struct platform_driver vim2m_pdrv = {
1114 .probe = vim2m_probe,
1115 .remove = vim2m_remove,
1116 .driver = {
1117 .name = MEM2MEM_NAME,
1118 },
1119 };
1120
1121 static void __exit vim2m_exit(void)
1122 {
1123 platform_driver_unregister(&vim2m_pdrv);
1124 platform_device_unregister(&vim2m_pdev);
1125 }
1126
1127 static int __init vim2m_init(void)
1128 {
1129 int ret;
1130
1131 ret = platform_device_register(&vim2m_pdev);
1132 if (ret)
1133 return ret;
1134
1135 ret = platform_driver_register(&vim2m_pdrv);
1136 if (ret)
1137 platform_device_unregister(&vim2m_pdev);
1138
1139 return ret;
1140 }
1141
1142 module_init(vim2m_init);
1143 module_exit(vim2m_exit);
Linux with added FPC-III support