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Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / media / test-drivers / vim2m.c
blob331a9053a0ed7ee0ce2062bbef7d22cda656dd94
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * A virtual v4l2-mem2mem example device.
4 *
5 * This is a virtual device driver for testing mem-to-mem videobuf framework.
6 * It simulates a device that uses memory buffers for both source and
7 * destination, processes the data and issues an "irq" (simulated by a delayed
8 * workqueue).
9 * The device is capable of multi-instance, multi-buffer-per-transaction
10 * operation (via the mem2mem framework).
11 *
12 * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
13 * Pawel Osciak, <pawel@osciak.com>
14 * Marek Szyprowski, <m.szyprowski@samsung.com>
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by the
18 * Free Software Foundation; either version 2 of the
19 * License, or (at your option) any later version
20 */
21 #include <linux/module.h>
22 #include <linux/delay.h>
23 #include <linux/fs.h>
24 #include <linux/sched.h>
25 #include <linux/slab.h>
26
27 #include <linux/platform_device.h>
28 #include <media/v4l2-mem2mem.h>
29 #include <media/v4l2-device.h>
30 #include <media/v4l2-ioctl.h>
31 #include <media/v4l2-ctrls.h>
32 #include <media/v4l2-event.h>
33 #include <media/videobuf2-vmalloc.h>
34
35 MODULE_DESCRIPTION("Virtual device for mem2mem framework testing");
36 MODULE_AUTHOR("Pawel Osciak, <pawel@osciak.com>");
37 MODULE_LICENSE("GPL");
38 MODULE_VERSION("0.2");
39 MODULE_ALIAS("mem2mem_testdev");
40
41 static unsigned int debug;
42 module_param(debug, uint, 0644);
43 MODULE_PARM_DESC(debug, "debug level");
44
45 /* Default transaction time in msec */
46 static unsigned int default_transtime = 40; /* Max 25 fps */
47 module_param(default_transtime, uint, 0644);
48 MODULE_PARM_DESC(default_transtime, "default transaction time in ms");
49
50 #define MIN_W 32
51 #define MIN_H 32
52 #define MAX_W 640
53 #define MAX_H 480
54
55 /* Pixel alignment for non-bayer formats */
56 #define WIDTH_ALIGN 2
57 #define HEIGHT_ALIGN 1
58
59 /* Pixel alignment for bayer formats */
60 #define BAYER_WIDTH_ALIGN 2
61 #define BAYER_HEIGHT_ALIGN 2
62
63 /* Flags that indicate a format can be used for capture/output */
64 #define MEM2MEM_CAPTURE BIT(0)
65 #define MEM2MEM_OUTPUT BIT(1)
66
67 #define MEM2MEM_NAME "vim2m"
68
69 /* Per queue */
70 #define MEM2MEM_DEF_NUM_BUFS VIDEO_MAX_FRAME
71 /* In bytes, per queue */
72 #define MEM2MEM_VID_MEM_LIMIT (16 * 1024 * 1024)
73
74 /* Flags that indicate processing mode */
75 #define MEM2MEM_HFLIP BIT(0)
76 #define MEM2MEM_VFLIP BIT(1)
77
78 #define dprintk(dev, lvl, fmt, arg...) \
79 v4l2_dbg(lvl, debug, &(dev)->v4l2_dev, "%s: " fmt, __func__, ## arg)
80
81 static void vim2m_dev_release(struct device *dev)
82 {}
83
84 static struct platform_device vim2m_pdev = {
85 .name = MEM2MEM_NAME,
86 .dev.release = vim2m_dev_release,
87 };
88
89 struct vim2m_fmt {
90 u32 fourcc;
91 int depth;
92 /* Types the format can be used for */
93 u32 types;
94 };
95
96 static struct vim2m_fmt formats[] = {
97 {
98 .fourcc = V4L2_PIX_FMT_RGB565, /* rrrrrggg gggbbbbb */
99 .depth = 16,
100 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
101 }, {
102 .fourcc = V4L2_PIX_FMT_RGB565X, /* gggbbbbb rrrrrggg */
103 .depth = 16,
104 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
105 }, {
106 .fourcc = V4L2_PIX_FMT_RGB24,
107 .depth = 24,
108 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
109 }, {
110 .fourcc = V4L2_PIX_FMT_BGR24,
111 .depth = 24,
112 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
113 }, {
114 .fourcc = V4L2_PIX_FMT_YUYV,
115 .depth = 16,
116 .types = MEM2MEM_CAPTURE,
117 }, {
118 .fourcc = V4L2_PIX_FMT_SBGGR8,
119 .depth = 8,
120 .types = MEM2MEM_CAPTURE,
121 }, {
122 .fourcc = V4L2_PIX_FMT_SGBRG8,
123 .depth = 8,
124 .types = MEM2MEM_CAPTURE,
125 }, {
126 .fourcc = V4L2_PIX_FMT_SGRBG8,
127 .depth = 8,
128 .types = MEM2MEM_CAPTURE,
129 }, {
130 .fourcc = V4L2_PIX_FMT_SRGGB8,
131 .depth = 8,
132 .types = MEM2MEM_CAPTURE,
133 },
134 };
135
136 #define NUM_FORMATS ARRAY_SIZE(formats)
137
138 /* Per-queue, driver-specific private data */
139 struct vim2m_q_data {
140 unsigned int width;
141 unsigned int height;
142 unsigned int sizeimage;
143 unsigned int sequence;
144 struct vim2m_fmt *fmt;
145 };
146
147 enum {
148 V4L2_M2M_SRC = 0,
149 V4L2_M2M_DST = 1,
150 };
151
152 #define V4L2_CID_TRANS_TIME_MSEC (V4L2_CID_USER_BASE + 0x1000)
153 #define V4L2_CID_TRANS_NUM_BUFS (V4L2_CID_USER_BASE + 0x1001)
154
155 static struct vim2m_fmt *find_format(u32 fourcc)
156 {
157 struct vim2m_fmt *fmt;
158 unsigned int k;
159
160 for (k = 0; k < NUM_FORMATS; k++) {
161 fmt = &formats[k];
162 if (fmt->fourcc == fourcc)
163 break;
164 }
165
166 if (k == NUM_FORMATS)
167 return NULL;
168
169 return &formats[k];
170 }
171
172 static void get_alignment(u32 fourcc,
173 unsigned int *walign, unsigned int *halign)
174 {
175 switch (fourcc) {
176 case V4L2_PIX_FMT_SBGGR8:
177 case V4L2_PIX_FMT_SGBRG8:
178 case V4L2_PIX_FMT_SGRBG8:
179 case V4L2_PIX_FMT_SRGGB8:
180 *walign = BAYER_WIDTH_ALIGN;
181 *halign = BAYER_HEIGHT_ALIGN;
182 return;
183 default:
184 *walign = WIDTH_ALIGN;
185 *halign = HEIGHT_ALIGN;
186 return;
187 }
188 }
189
190 struct vim2m_dev {
191 struct v4l2_device v4l2_dev;
192 struct video_device vfd;
193 #ifdef CONFIG_MEDIA_CONTROLLER
194 struct media_device mdev;
195 #endif
196
197 atomic_t num_inst;
198 struct mutex dev_mutex;
199
200 struct v4l2_m2m_dev *m2m_dev;
201 };
202
203 struct vim2m_ctx {
204 struct v4l2_fh fh;
205 struct vim2m_dev *dev;
206
207 struct v4l2_ctrl_handler hdl;
208
209 /* Processed buffers in this transaction */
210 u8 num_processed;
211
212 /* Transaction length (i.e. how many buffers per transaction) */
213 u32 translen;
214 /* Transaction time (i.e. simulated processing time) in milliseconds */
215 u32 transtime;
216
217 struct mutex vb_mutex;
218 struct delayed_work work_run;
219
220 /* Abort requested by m2m */
221 int aborting;
222
223 /* Processing mode */
224 int mode;
225
226 enum v4l2_colorspace colorspace;
227 enum v4l2_ycbcr_encoding ycbcr_enc;
228 enum v4l2_xfer_func xfer_func;
229 enum v4l2_quantization quant;
230
231 /* Source and destination queue data */
232 struct vim2m_q_data q_data[2];
233 };
234
235 static inline struct vim2m_ctx *file2ctx(struct file *file)
236 {
237 return container_of(file->private_data, struct vim2m_ctx, fh);
238 }
239
240 static struct vim2m_q_data *get_q_data(struct vim2m_ctx *ctx,
241 enum v4l2_buf_type type)
242 {
243 switch (type) {
244 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
245 return &ctx->q_data[V4L2_M2M_SRC];
246 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
247 return &ctx->q_data[V4L2_M2M_DST];
248 default:
249 return NULL;
250 }
251 }
252
253 static const char *type_name(enum v4l2_buf_type type)
254 {
255 switch (type) {
256 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
257 return "Output";
258 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
259 return "Capture";
260 default:
261 return "Invalid";
262 }
263 }
264
265 #define CLIP(__color) \
266 (u8)(((__color) > 0xff) ? 0xff : (((__color) < 0) ? 0 : (__color)))
267
268 static void copy_line(struct vim2m_q_data *q_data_out,
269 u8 *src, u8 *dst, bool reverse)
270 {
271 int x, depth = q_data_out->fmt->depth >> 3;
272
273 if (!reverse) {
274 memcpy(dst, src, q_data_out->width * depth);
275 } else {
276 for (x = 0; x < q_data_out->width >> 1; x++) {
277 memcpy(dst, src, depth);
278 memcpy(dst + depth, src - depth, depth);
279 src -= depth << 1;
280 dst += depth << 1;
281 }
282 return;
283 }
284 }
285
286 static void copy_two_pixels(struct vim2m_q_data *q_data_in,
287 struct vim2m_q_data *q_data_out,
288 u8 *src[2], u8 **dst, int ypos, bool reverse)
289 {
290 struct vim2m_fmt *out = q_data_out->fmt;
291 struct vim2m_fmt *in = q_data_in->fmt;
292 u8 _r[2], _g[2], _b[2], *r, *g, *b;
293 int i;
294
295 /* Step 1: read two consecutive pixels from src pointer */
296
297 r = _r;
298 g = _g;
299 b = _b;
300
301 switch (in->fourcc) {
302 case V4L2_PIX_FMT_RGB565: /* rrrrrggg gggbbbbb */
303 for (i = 0; i < 2; i++) {
304 u16 pix = le16_to_cpu(*(__le16 *)(src[i]));
305
306 *r++ = (u8)(((pix & 0xf800) >> 11) << 3) | 0x07;
307 *g++ = (u8)((((pix & 0x07e0) >> 5)) << 2) | 0x03;
308 *b++ = (u8)((pix & 0x1f) << 3) | 0x07;
309 }
310 break;
311 case V4L2_PIX_FMT_RGB565X: /* gggbbbbb rrrrrggg */
312 for (i = 0; i < 2; i++) {
313 u16 pix = be16_to_cpu(*(__be16 *)(src[i]));
314
315 *r++ = (u8)(((pix & 0xf800) >> 11) << 3) | 0x07;
316 *g++ = (u8)((((pix & 0x07e0) >> 5)) << 2) | 0x03;
317 *b++ = (u8)((pix & 0x1f) << 3) | 0x07;
318 }
319 break;
320 default:
321 case V4L2_PIX_FMT_RGB24:
322 for (i = 0; i < 2; i++) {
323 *r++ = src[i][0];
324 *g++ = src[i][1];
325 *b++ = src[i][2];
326 }
327 break;
328 case V4L2_PIX_FMT_BGR24:
329 for (i = 0; i < 2; i++) {
330 *b++ = src[i][0];
331 *g++ = src[i][1];
332 *r++ = src[i][2];
333 }
334 break;
335 }
336
337 /* Step 2: store two consecutive points, reversing them if needed */
338
339 r = _r;
340 g = _g;
341 b = _b;
342
343 switch (out->fourcc) {
344 case V4L2_PIX_FMT_RGB565: /* rrrrrggg gggbbbbb */
345 for (i = 0; i < 2; i++) {
346 u16 pix;
347 __le16 *dst_pix = (__le16 *)*dst;
348
349 pix = ((*r << 8) & 0xf800) | ((*g << 3) & 0x07e0) |
350 (*b >> 3);
351
352 *dst_pix = cpu_to_le16(pix);
353
354 *dst += 2;
355 }
356 return;
357 case V4L2_PIX_FMT_RGB565X: /* gggbbbbb rrrrrggg */
358 for (i = 0; i < 2; i++) {
359 u16 pix;
360 __be16 *dst_pix = (__be16 *)*dst;
361
362 pix = ((*r << 8) & 0xf800) | ((*g << 3) & 0x07e0) |
363 (*b >> 3);
364
365 *dst_pix = cpu_to_be16(pix);
366
367 *dst += 2;
368 }
369 return;
370 case V4L2_PIX_FMT_RGB24:
371 for (i = 0; i < 2; i++) {
372 *(*dst)++ = *r++;
373 *(*dst)++ = *g++;
374 *(*dst)++ = *b++;
375 }
376 return;
377 case V4L2_PIX_FMT_BGR24:
378 for (i = 0; i < 2; i++) {
379 *(*dst)++ = *b++;
380 *(*dst)++ = *g++;
381 *(*dst)++ = *r++;
382 }
383 return;
384 case V4L2_PIX_FMT_YUYV:
385 default:
386 {
387 u8 y, y1, u, v;
388
389 y = ((8453 * (*r) + 16594 * (*g) + 3223 * (*b)
390 + 524288) >> 15);
391 u = ((-4878 * (*r) - 9578 * (*g) + 14456 * (*b)
392 + 4210688) >> 15);
393 v = ((14456 * (*r++) - 12105 * (*g++) - 2351 * (*b++)
394 + 4210688) >> 15);
395 y1 = ((8453 * (*r) + 16594 * (*g) + 3223 * (*b)
396 + 524288) >> 15);
397
398 *(*dst)++ = y;
399 *(*dst)++ = u;
400
401 *(*dst)++ = y1;
402 *(*dst)++ = v;
403 return;
404 }
405 case V4L2_PIX_FMT_SBGGR8:
406 if (!(ypos & 1)) {
407 *(*dst)++ = *b;
408 *(*dst)++ = *++g;
409 } else {
410 *(*dst)++ = *g;
411 *(*dst)++ = *++r;
412 }
413 return;
414 case V4L2_PIX_FMT_SGBRG8:
415 if (!(ypos & 1)) {
416 *(*dst)++ = *g;
417 *(*dst)++ = *++b;
418 } else {
419 *(*dst)++ = *r;
420 *(*dst)++ = *++g;
421 }
422 return;
423 case V4L2_PIX_FMT_SGRBG8:
424 if (!(ypos & 1)) {
425 *(*dst)++ = *g;
426 *(*dst)++ = *++r;
427 } else {
428 *(*dst)++ = *b;
429 *(*dst)++ = *++g;
430 }
431 return;
432 case V4L2_PIX_FMT_SRGGB8:
433 if (!(ypos & 1)) {
434 *(*dst)++ = *r;
435 *(*dst)++ = *++g;
436 } else {
437 *(*dst)++ = *g;
438 *(*dst)++ = *++b;
439 }
440 return;
441 }
442 }
443
444 static int device_process(struct vim2m_ctx *ctx,
445 struct vb2_v4l2_buffer *in_vb,
446 struct vb2_v4l2_buffer *out_vb)
447 {
448 struct vim2m_dev *dev = ctx->dev;
449 struct vim2m_q_data *q_data_in, *q_data_out;
450 u8 *p_in, *p_line, *p_in_x[2], *p, *p_out;
451 unsigned int width, height, bytesperline, bytes_per_pixel;
452 unsigned int x, y, y_in, y_out, x_int, x_fract, x_err, x_offset;
453 int start, end, step;
454
455 q_data_in = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
456 if (!q_data_in)
457 return 0;
458 bytesperline = (q_data_in->width * q_data_in->fmt->depth) >> 3;
459 bytes_per_pixel = q_data_in->fmt->depth >> 3;
460
461 q_data_out = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
462 if (!q_data_out)
463 return 0;
464
465 /* As we're doing scaling, use the output dimensions here */
466 height = q_data_out->height;
467 width = q_data_out->width;
468
469 p_in = vb2_plane_vaddr(&in_vb->vb2_buf, 0);
470 p_out = vb2_plane_vaddr(&out_vb->vb2_buf, 0);
471 if (!p_in || !p_out) {
472 v4l2_err(&dev->v4l2_dev,
473 "Acquiring kernel pointers to buffers failed\n");
474 return -EFAULT;
475 }
476
477 out_vb->sequence = q_data_out->sequence++;
478 in_vb->sequence = q_data_in->sequence++;
479 v4l2_m2m_buf_copy_metadata(in_vb, out_vb, true);
480
481 if (ctx->mode & MEM2MEM_VFLIP) {
482 start = height - 1;
483 end = -1;
484 step = -1;
485 } else {
486 start = 0;
487 end = height;
488 step = 1;
489 }
490 y_out = 0;
491
492 /*
493 * When format and resolution are identical,
494 * we can use a faster copy logic
495 */
496 if (q_data_in->fmt->fourcc == q_data_out->fmt->fourcc &&
497 q_data_in->width == q_data_out->width &&
498 q_data_in->height == q_data_out->height) {
499 for (y = start; y != end; y += step, y_out++) {
500 p = p_in + (y * bytesperline);
501 if (ctx->mode & MEM2MEM_HFLIP)
502 p += bytesperline - (q_data_in->fmt->depth >> 3);
503
504 copy_line(q_data_out, p, p_out,
505 ctx->mode & MEM2MEM_HFLIP);
506
507 p_out += bytesperline;
508 }
509 return 0;
510 }
511
512 /* Slower algorithm with format conversion, hflip, vflip and scaler */
513
514 /* To speed scaler up, use Bresenham for X dimension */
515 x_int = q_data_in->width / q_data_out->width;
516 x_fract = q_data_in->width % q_data_out->width;
517
518 for (y = start; y != end; y += step, y_out++) {
519 y_in = (y * q_data_in->height) / q_data_out->height;
520 x_offset = 0;
521 x_err = 0;
522
523 p_line = p_in + (y_in * bytesperline);
524 if (ctx->mode & MEM2MEM_HFLIP)
525 p_line += bytesperline - (q_data_in->fmt->depth >> 3);
526 p_in_x[0] = p_line;
527
528 for (x = 0; x < width >> 1; x++) {
529 x_offset += x_int;
530 x_err += x_fract;
531 if (x_err > width) {
532 x_offset++;
533 x_err -= width;
534 }
535
536 if (ctx->mode & MEM2MEM_HFLIP)
537 p_in_x[1] = p_line - x_offset * bytes_per_pixel;
538 else
539 p_in_x[1] = p_line + x_offset * bytes_per_pixel;
540
541 copy_two_pixels(q_data_in, q_data_out,
542 p_in_x, &p_out, y_out,
543 ctx->mode & MEM2MEM_HFLIP);
544
545 /* Calculate the next p_in_x0 */
546 x_offset += x_int;
547 x_err += x_fract;
548 if (x_err > width) {
549 x_offset++;
550 x_err -= width;
551 }
552
553 if (ctx->mode & MEM2MEM_HFLIP)
554 p_in_x[0] = p_line - x_offset * bytes_per_pixel;
555 else
556 p_in_x[0] = p_line + x_offset * bytes_per_pixel;
557 }
558 }
559
560 return 0;
561 }
562
563 /*
564 * mem2mem callbacks
565 */
566
567 /*
568 * job_ready() - check whether an instance is ready to be scheduled to run
569 */
570 static int job_ready(void *priv)
571 {
572 struct vim2m_ctx *ctx = priv;
573
574 if (v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx) < ctx->translen
575 || v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx) < ctx->translen) {
576 dprintk(ctx->dev, 1, "Not enough buffers available\n");
577 return 0;
578 }
579
580 return 1;
581 }
582
583 static void job_abort(void *priv)
584 {
585 struct vim2m_ctx *ctx = priv;
586
587 /* Will cancel the transaction in the next interrupt handler */
588 ctx->aborting = 1;
589 }
590
591 /* device_run() - prepares and starts the device
592 *
593 * This simulates all the immediate preparations required before starting
594 * a device. This will be called by the framework when it decides to schedule
595 * a particular instance.
596 */
597 static void device_run(void *priv)
598 {
599 struct vim2m_ctx *ctx = priv;
600 struct vb2_v4l2_buffer *src_buf, *dst_buf;
601
602 src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
603 dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
604
605 /* Apply request controls if any */
606 v4l2_ctrl_request_setup(src_buf->vb2_buf.req_obj.req,
607 &ctx->hdl);
608
609 device_process(ctx, src_buf, dst_buf);
610
611 /* Complete request controls if any */
612 v4l2_ctrl_request_complete(src_buf->vb2_buf.req_obj.req,
613 &ctx->hdl);
614
615 /* Run delayed work, which simulates a hardware irq */
616 schedule_delayed_work(&ctx->work_run, msecs_to_jiffies(ctx->transtime));
617 }
618
619 static void device_work(struct work_struct *w)
620 {
621 struct vim2m_ctx *curr_ctx;
622 struct vim2m_dev *vim2m_dev;
623 struct vb2_v4l2_buffer *src_vb, *dst_vb;
624
625 curr_ctx = container_of(w, struct vim2m_ctx, work_run.work);
626
627 if (!curr_ctx) {
628 pr_err("Instance released before the end of transaction\n");
629 return;
630 }
631
632 vim2m_dev = curr_ctx->dev;
633
634 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);
635 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);
636
637 curr_ctx->num_processed++;
638
639 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
640 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
641
642 if (curr_ctx->num_processed == curr_ctx->translen
643 || curr_ctx->aborting) {
644 dprintk(curr_ctx->dev, 2, "Finishing capture buffer fill\n");
645 curr_ctx->num_processed = 0;
646 v4l2_m2m_job_finish(vim2m_dev->m2m_dev, curr_ctx->fh.m2m_ctx);
647 } else {
648 device_run(curr_ctx);
649 }
650 }
651
652 /*
653 * video ioctls
654 */
655 static int vidioc_querycap(struct file *file, void *priv,
656 struct v4l2_capability *cap)
657 {
658 strscpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver));
659 strscpy(cap->card, MEM2MEM_NAME, sizeof(cap->card));
660 snprintf(cap->bus_info, sizeof(cap->bus_info),
661 "platform:%s", MEM2MEM_NAME);
662 return 0;
663 }
664
665 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
666 {
667 int i, num;
668 struct vim2m_fmt *fmt;
669
670 num = 0;
671
672 for (i = 0; i < NUM_FORMATS; ++i) {
673 if (formats[i].types & type) {
674 /* index-th format of type type found ? */
675 if (num == f->index)
676 break;
677 /*
678 * Correct type but haven't reached our index yet,
679 * just increment per-type index
680 */
681 ++num;
682 }
683 }
684
685 if (i < NUM_FORMATS) {
686 /* Format found */
687 fmt = &formats[i];
688 f->pixelformat = fmt->fourcc;
689 return 0;
690 }
691
692 /* Format not found */
693 return -EINVAL;
694 }
695
696 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
697 struct v4l2_fmtdesc *f)
698 {
699 return enum_fmt(f, MEM2MEM_CAPTURE);
700 }
701
702 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
703 struct v4l2_fmtdesc *f)
704 {
705 return enum_fmt(f, MEM2MEM_OUTPUT);
706 }
707
708 static int vidioc_enum_framesizes(struct file *file, void *priv,
709 struct v4l2_frmsizeenum *fsize)
710 {
711 if (fsize->index != 0)
712 return -EINVAL;
713
714 if (!find_format(fsize->pixel_format))
715 return -EINVAL;
716
717 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
718 fsize->stepwise.min_width = MIN_W;
719 fsize->stepwise.min_height = MIN_H;
720 fsize->stepwise.max_width = MAX_W;
721 fsize->stepwise.max_height = MAX_H;
722
723 get_alignment(fsize->pixel_format,
724 &fsize->stepwise.step_width,
725 &fsize->stepwise.step_height);
726 return 0;
727 }
728
729 static int vidioc_g_fmt(struct vim2m_ctx *ctx, struct v4l2_format *f)
730 {
731 struct vb2_queue *vq;
732 struct vim2m_q_data *q_data;
733
734 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
735 if (!vq)
736 return -EINVAL;
737
738 q_data = get_q_data(ctx, f->type);
739 if (!q_data)
740 return -EINVAL;
741
742 f->fmt.pix.width = q_data->width;
743 f->fmt.pix.height = q_data->height;
744 f->fmt.pix.field = V4L2_FIELD_NONE;
745 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
746 f->fmt.pix.bytesperline = (q_data->width * q_data->fmt->depth) >> 3;
747 f->fmt.pix.sizeimage = q_data->sizeimage;
748 f->fmt.pix.colorspace = ctx->colorspace;
749 f->fmt.pix.xfer_func = ctx->xfer_func;
750 f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc;
751 f->fmt.pix.quantization = ctx->quant;
752
753 return 0;
754 }
755
756 static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
757 struct v4l2_format *f)
758 {
759 return vidioc_g_fmt(file2ctx(file), f);
760 }
761
762 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
763 struct v4l2_format *f)
764 {
765 return vidioc_g_fmt(file2ctx(file), f);
766 }
767
768 static int vidioc_try_fmt(struct v4l2_format *f, struct vim2m_fmt *fmt)
769 {
770 int walign, halign;
771 /*
772 * V4L2 specification specifies the driver corrects the
773 * format struct if any of the dimensions is unsupported
774 */
775 if (f->fmt.pix.height < MIN_H)
776 f->fmt.pix.height = MIN_H;
777 else if (f->fmt.pix.height > MAX_H)
778 f->fmt.pix.height = MAX_H;
779
780 if (f->fmt.pix.width < MIN_W)
781 f->fmt.pix.width = MIN_W;
782 else if (f->fmt.pix.width > MAX_W)
783 f->fmt.pix.width = MAX_W;
784
785 get_alignment(f->fmt.pix.pixelformat, &walign, &halign);
786 f->fmt.pix.width &= ~(walign - 1);
787 f->fmt.pix.height &= ~(halign - 1);
788 f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
789 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
790 f->fmt.pix.field = V4L2_FIELD_NONE;
791
792 return 0;
793 }
794
795 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
796 struct v4l2_format *f)
797 {
798 struct vim2m_fmt *fmt;
799 struct vim2m_ctx *ctx = file2ctx(file);
800
801 fmt = find_format(f->fmt.pix.pixelformat);
802 if (!fmt) {
803 f->fmt.pix.pixelformat = formats[0].fourcc;
804 fmt = find_format(f->fmt.pix.pixelformat);
805 }
806 if (!(fmt->types & MEM2MEM_CAPTURE)) {
807 v4l2_err(&ctx->dev->v4l2_dev,
808 "Fourcc format (0x%08x) invalid.\n",
809 f->fmt.pix.pixelformat);
810 return -EINVAL;
811 }
812 f->fmt.pix.colorspace = ctx->colorspace;
813 f->fmt.pix.xfer_func = ctx->xfer_func;
814 f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc;
815 f->fmt.pix.quantization = ctx->quant;
816
817 return vidioc_try_fmt(f, fmt);
818 }
819
820 static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
821 struct v4l2_format *f)
822 {
823 struct vim2m_fmt *fmt;
824 struct vim2m_ctx *ctx = file2ctx(file);
825
826 fmt = find_format(f->fmt.pix.pixelformat);
827 if (!fmt) {
828 f->fmt.pix.pixelformat = formats[0].fourcc;
829 fmt = find_format(f->fmt.pix.pixelformat);
830 }
831 if (!(fmt->types & MEM2MEM_OUTPUT)) {
832 v4l2_err(&ctx->dev->v4l2_dev,
833 "Fourcc format (0x%08x) invalid.\n",
834 f->fmt.pix.pixelformat);
835 return -EINVAL;
836 }
837 if (!f->fmt.pix.colorspace)
838 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
839
840 return vidioc_try_fmt(f, fmt);
841 }
842
843 static int vidioc_s_fmt(struct vim2m_ctx *ctx, struct v4l2_format *f)
844 {
845 struct vim2m_q_data *q_data;
846 struct vb2_queue *vq;
847
848 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
849 if (!vq)
850 return -EINVAL;
851
852 q_data = get_q_data(ctx, f->type);
853 if (!q_data)
854 return -EINVAL;
855
856 if (vb2_is_busy(vq)) {
857 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
858 return -EBUSY;
859 }
860
861 q_data->fmt = find_format(f->fmt.pix.pixelformat);
862 q_data->width = f->fmt.pix.width;
863 q_data->height = f->fmt.pix.height;
864 q_data->sizeimage = q_data->width * q_data->height
865 * q_data->fmt->depth >> 3;
866
867 dprintk(ctx->dev, 1,
868 "Format for type %s: %dx%d (%d bpp), fmt: %c%c%c%c\n",
869 type_name(f->type), q_data->width, q_data->height,
870 q_data->fmt->depth,
871 (q_data->fmt->fourcc & 0xff),
872 (q_data->fmt->fourcc >> 8) & 0xff,
873 (q_data->fmt->fourcc >> 16) & 0xff,
874 (q_data->fmt->fourcc >> 24) & 0xff);
875
876 return 0;
877 }
878
879 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
880 struct v4l2_format *f)
881 {
882 int ret;
883
884 ret = vidioc_try_fmt_vid_cap(file, priv, f);
885 if (ret)
886 return ret;
887
888 return vidioc_s_fmt(file2ctx(file), f);
889 }
890
891 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
892 struct v4l2_format *f)
893 {
894 struct vim2m_ctx *ctx = file2ctx(file);
895 int ret;
896
897 ret = vidioc_try_fmt_vid_out(file, priv, f);
898 if (ret)
899 return ret;
900
901 ret = vidioc_s_fmt(file2ctx(file), f);
902 if (!ret) {
903 ctx->colorspace = f->fmt.pix.colorspace;
904 ctx->xfer_func = f->fmt.pix.xfer_func;
905 ctx->ycbcr_enc = f->fmt.pix.ycbcr_enc;
906 ctx->quant = f->fmt.pix.quantization;
907 }
908 return ret;
909 }
910
911 static int vim2m_s_ctrl(struct v4l2_ctrl *ctrl)
912 {
913 struct vim2m_ctx *ctx =
914 container_of(ctrl->handler, struct vim2m_ctx, hdl);
915
916 switch (ctrl->id) {
917 case V4L2_CID_HFLIP:
918 if (ctrl->val)
919 ctx->mode |= MEM2MEM_HFLIP;
920 else
921 ctx->mode &= ~MEM2MEM_HFLIP;
922 break;
923
924 case V4L2_CID_VFLIP:
925 if (ctrl->val)
926 ctx->mode |= MEM2MEM_VFLIP;
927 else
928 ctx->mode &= ~MEM2MEM_VFLIP;
929 break;
930
931 case V4L2_CID_TRANS_TIME_MSEC:
932 ctx->transtime = ctrl->val;
933 if (ctx->transtime < 1)
934 ctx->transtime = 1;
935 break;
936
937 case V4L2_CID_TRANS_NUM_BUFS:
938 ctx->translen = ctrl->val;
939 break;
940
941 default:
942 v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n");
943 return -EINVAL;
944 }
945
946 return 0;
947 }
948
949 static const struct v4l2_ctrl_ops vim2m_ctrl_ops = {
950 .s_ctrl = vim2m_s_ctrl,
951 };
952
953 static const struct v4l2_ioctl_ops vim2m_ioctl_ops = {
954 .vidioc_querycap = vidioc_querycap,
955
956 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
957 .vidioc_enum_framesizes = vidioc_enum_framesizes,
958 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
959 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
960 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
961
962 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
963 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
964 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
965 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
966
967 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
968 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
969 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
970 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
971 .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf,
972 .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
973 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
974
975 .vidioc_streamon = v4l2_m2m_ioctl_streamon,
976 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
977
978 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
979 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
980 };
981
982 /*
983 * Queue operations
984 */
985
986 static int vim2m_queue_setup(struct vb2_queue *vq,
987 unsigned int *nbuffers,
988 unsigned int *nplanes,
989 unsigned int sizes[],
990 struct device *alloc_devs[])
991 {
992 struct vim2m_ctx *ctx = vb2_get_drv_priv(vq);
993 struct vim2m_q_data *q_data;
994 unsigned int size, count = *nbuffers;
995
996 q_data = get_q_data(ctx, vq->type);
997 if (!q_data)
998 return -EINVAL;
999
1000 size = q_data->width * q_data->height * q_data->fmt->depth >> 3;
1001
1002 while (size * count > MEM2MEM_VID_MEM_LIMIT)
1003 (count)--;
1004 *nbuffers = count;
1005
1006 if (*nplanes)
1007 return sizes[0] < size ? -EINVAL : 0;
1008
1009 *nplanes = 1;
1010 sizes[0] = size;
1011
1012 dprintk(ctx->dev, 1, "%s: get %d buffer(s) of size %d each.\n",
1013 type_name(vq->type), count, size);
1014
1015 return 0;
1016 }
1017
1018 static int vim2m_buf_out_validate(struct vb2_buffer *vb)
1019 {
1020 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1021 struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
1022
1023 if (vbuf->field == V4L2_FIELD_ANY)
1024 vbuf->field = V4L2_FIELD_NONE;
1025 if (vbuf->field != V4L2_FIELD_NONE) {
1026 dprintk(ctx->dev, 1, "%s field isn't supported\n", __func__);
1027 return -EINVAL;
1028 }
1029
1030 return 0;
1031 }
1032
1033 static int vim2m_buf_prepare(struct vb2_buffer *vb)
1034 {
1035 struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
1036 struct vim2m_q_data *q_data;
1037
1038 dprintk(ctx->dev, 2, "type: %s\n", type_name(vb->vb2_queue->type));
1039
1040 q_data = get_q_data(ctx, vb->vb2_queue->type);
1041 if (!q_data)
1042 return -EINVAL;
1043 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
1044 dprintk(ctx->dev, 1,
1045 "%s data will not fit into plane (%lu < %lu)\n",
1046 __func__, vb2_plane_size(vb, 0),
1047 (long)q_data->sizeimage);
1048 return -EINVAL;
1049 }
1050
1051 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
1052
1053 return 0;
1054 }
1055
1056 static void vim2m_buf_queue(struct vb2_buffer *vb)
1057 {
1058 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1059 struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
1060
1061 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
1062 }
1063
1064 static int vim2m_start_streaming(struct vb2_queue *q, unsigned int count)
1065 {
1066 struct vim2m_ctx *ctx = vb2_get_drv_priv(q);
1067 struct vim2m_q_data *q_data = get_q_data(ctx, q->type);
1068
1069 if (!q_data)
1070 return -EINVAL;
1071
1072 if (V4L2_TYPE_IS_OUTPUT(q->type))
1073 ctx->aborting = 0;
1074
1075 q_data->sequence = 0;
1076 return 0;
1077 }
1078
1079 static void vim2m_stop_streaming(struct vb2_queue *q)
1080 {
1081 struct vim2m_ctx *ctx = vb2_get_drv_priv(q);
1082 struct vb2_v4l2_buffer *vbuf;
1083
1084 cancel_delayed_work_sync(&ctx->work_run);
1085
1086 for (;;) {
1087 if (V4L2_TYPE_IS_OUTPUT(q->type))
1088 vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
1089 else
1090 vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
1091 if (!vbuf)
1092 return;
1093 v4l2_ctrl_request_complete(vbuf->vb2_buf.req_obj.req,
1094 &ctx->hdl);
1095 v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
1096 }
1097 }
1098
1099 static void vim2m_buf_request_complete(struct vb2_buffer *vb)
1100 {
1101 struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
1102
1103 v4l2_ctrl_request_complete(vb->req_obj.req, &ctx->hdl);
1104 }
1105
1106 static const struct vb2_ops vim2m_qops = {
1107 .queue_setup = vim2m_queue_setup,
1108 .buf_out_validate = vim2m_buf_out_validate,
1109 .buf_prepare = vim2m_buf_prepare,
1110 .buf_queue = vim2m_buf_queue,
1111 .start_streaming = vim2m_start_streaming,
1112 .stop_streaming = vim2m_stop_streaming,
1113 .wait_prepare = vb2_ops_wait_prepare,
1114 .wait_finish = vb2_ops_wait_finish,
1115 .buf_request_complete = vim2m_buf_request_complete,
1116 };
1117
1118 static int queue_init(void *priv, struct vb2_queue *src_vq,
1119 struct vb2_queue *dst_vq)
1120 {
1121 struct vim2m_ctx *ctx = priv;
1122 int ret;
1123
1124 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1125 src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1126 src_vq->drv_priv = ctx;
1127 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
1128 src_vq->ops = &vim2m_qops;
1129 src_vq->mem_ops = &vb2_vmalloc_memops;
1130 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1131 src_vq->lock = &ctx->vb_mutex;
1132 src_vq->supports_requests = true;
1133
1134 ret = vb2_queue_init(src_vq);
1135 if (ret)
1136 return ret;
1137
1138 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1139 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1140 dst_vq->drv_priv = ctx;
1141 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
1142 dst_vq->ops = &vim2m_qops;
1143 dst_vq->mem_ops = &vb2_vmalloc_memops;
1144 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1145 dst_vq->lock = &ctx->vb_mutex;
1146
1147 return vb2_queue_init(dst_vq);
1148 }
1149
1150 static struct v4l2_ctrl_config vim2m_ctrl_trans_time_msec = {
1151 .ops = &vim2m_ctrl_ops,
1152 .id = V4L2_CID_TRANS_TIME_MSEC,
1153 .name = "Transaction Time (msec)",
1154 .type = V4L2_CTRL_TYPE_INTEGER,
1155 .min = 1,
1156 .max = 10001,
1157 .step = 1,
1158 };
1159
1160 static const struct v4l2_ctrl_config vim2m_ctrl_trans_num_bufs = {
1161 .ops = &vim2m_ctrl_ops,
1162 .id = V4L2_CID_TRANS_NUM_BUFS,
1163 .name = "Buffers Per Transaction",
1164 .type = V4L2_CTRL_TYPE_INTEGER,
1165 .def = 1,
1166 .min = 1,
1167 .max = MEM2MEM_DEF_NUM_BUFS,
1168 .step = 1,
1169 };
1170
1171 /*
1172 * File operations
1173 */
1174 static int vim2m_open(struct file *file)
1175 {
1176 struct vim2m_dev *dev = video_drvdata(file);
1177 struct vim2m_ctx *ctx = NULL;
1178 struct v4l2_ctrl_handler *hdl;
1179 int rc = 0;
1180
1181 if (mutex_lock_interruptible(&dev->dev_mutex))
1182 return -ERESTARTSYS;
1183 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
1184 if (!ctx) {
1185 rc = -ENOMEM;
1186 goto open_unlock;
1187 }
1188
1189 v4l2_fh_init(&ctx->fh, video_devdata(file));
1190 file->private_data = &ctx->fh;
1191 ctx->dev = dev;
1192 hdl = &ctx->hdl;
1193 v4l2_ctrl_handler_init(hdl, 4);
1194 v4l2_ctrl_new_std(hdl, &vim2m_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
1195 v4l2_ctrl_new_std(hdl, &vim2m_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
1196
1197 vim2m_ctrl_trans_time_msec.def = default_transtime;
1198 v4l2_ctrl_new_custom(hdl, &vim2m_ctrl_trans_time_msec, NULL);
1199 v4l2_ctrl_new_custom(hdl, &vim2m_ctrl_trans_num_bufs, NULL);
1200 if (hdl->error) {
1201 rc = hdl->error;
1202 v4l2_ctrl_handler_free(hdl);
1203 kfree(ctx);
1204 goto open_unlock;
1205 }
1206 ctx->fh.ctrl_handler = hdl;
1207 v4l2_ctrl_handler_setup(hdl);
1208
1209 ctx->q_data[V4L2_M2M_SRC].fmt = &formats[0];
1210 ctx->q_data[V4L2_M2M_SRC].width = 640;
1211 ctx->q_data[V4L2_M2M_SRC].height = 480;
1212 ctx->q_data[V4L2_M2M_SRC].sizeimage =
1213 ctx->q_data[V4L2_M2M_SRC].width *
1214 ctx->q_data[V4L2_M2M_SRC].height *
1215 (ctx->q_data[V4L2_M2M_SRC].fmt->depth >> 3);
1216 ctx->q_data[V4L2_M2M_DST] = ctx->q_data[V4L2_M2M_SRC];
1217 ctx->colorspace = V4L2_COLORSPACE_REC709;
1218
1219 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);
1220
1221 mutex_init(&ctx->vb_mutex);
1222 INIT_DELAYED_WORK(&ctx->work_run, device_work);
1223
1224 if (IS_ERR(ctx->fh.m2m_ctx)) {
1225 rc = PTR_ERR(ctx->fh.m2m_ctx);
1226
1227 v4l2_ctrl_handler_free(hdl);
1228 v4l2_fh_exit(&ctx->fh);
1229 kfree(ctx);
1230 goto open_unlock;
1231 }
1232
1233 v4l2_fh_add(&ctx->fh);
1234 atomic_inc(&dev->num_inst);
1235
1236 dprintk(dev, 1, "Created instance: %p, m2m_ctx: %p\n",
1237 ctx, ctx->fh.m2m_ctx);
1238
1239 open_unlock:
1240 mutex_unlock(&dev->dev_mutex);
1241 return rc;
1242 }
1243
1244 static int vim2m_release(struct file *file)
1245 {
1246 struct vim2m_dev *dev = video_drvdata(file);
1247 struct vim2m_ctx *ctx = file2ctx(file);
1248
1249 dprintk(dev, 1, "Releasing instance %p\n", ctx);
1250
1251 v4l2_fh_del(&ctx->fh);
1252 v4l2_fh_exit(&ctx->fh);
1253 v4l2_ctrl_handler_free(&ctx->hdl);
1254 mutex_lock(&dev->dev_mutex);
1255 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
1256 mutex_unlock(&dev->dev_mutex);
1257 kfree(ctx);
1258
1259 atomic_dec(&dev->num_inst);
1260
1261 return 0;
1262 }
1263
1264 static void vim2m_device_release(struct video_device *vdev)
1265 {
1266 struct vim2m_dev *dev = container_of(vdev, struct vim2m_dev, vfd);
1267
1268 v4l2_device_unregister(&dev->v4l2_dev);
1269 v4l2_m2m_release(dev->m2m_dev);
1270 #ifdef CONFIG_MEDIA_CONTROLLER
1271 media_device_cleanup(&dev->mdev);
1272 #endif
1273 kfree(dev);
1274 }
1275
1276 static const struct v4l2_file_operations vim2m_fops = {
1277 .owner = THIS_MODULE,
1278 .open = vim2m_open,
1279 .release = vim2m_release,
1280 .poll = v4l2_m2m_fop_poll,
1281 .unlocked_ioctl = video_ioctl2,
1282 .mmap = v4l2_m2m_fop_mmap,
1283 };
1284
1285 static const struct video_device vim2m_videodev = {
1286 .name = MEM2MEM_NAME,
1287 .vfl_dir = VFL_DIR_M2M,
1288 .fops = &vim2m_fops,
1289 .ioctl_ops = &vim2m_ioctl_ops,
1290 .minor = -1,
1291 .release = vim2m_device_release,
1292 .device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING,
1293 };
1294
1295 static const struct v4l2_m2m_ops m2m_ops = {
1296 .device_run = device_run,
1297 .job_ready = job_ready,
1298 .job_abort = job_abort,
1299 };
1300
1301 static const struct media_device_ops m2m_media_ops = {
1302 .req_validate = vb2_request_validate,
1303 .req_queue = v4l2_m2m_request_queue,
1304 };
1305
1306 static int vim2m_probe(struct platform_device *pdev)
1307 {
1308 struct vim2m_dev *dev;
1309 struct video_device *vfd;
1310 int ret;
1311
1312 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1313 if (!dev)
1314 return -ENOMEM;
1315
1316 ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
1317 if (ret)
1318 goto error_free;
1319
1320 atomic_set(&dev->num_inst, 0);
1321 mutex_init(&dev->dev_mutex);
1322
1323 dev->vfd = vim2m_videodev;
1324 vfd = &dev->vfd;
1325 vfd->lock = &dev->dev_mutex;
1326 vfd->v4l2_dev = &dev->v4l2_dev;
1327
1328 video_set_drvdata(vfd, dev);
1329 v4l2_info(&dev->v4l2_dev,
1330 "Device registered as /dev/video%d\n", vfd->num);
1331
1332 platform_set_drvdata(pdev, dev);
1333
1334 dev->m2m_dev = v4l2_m2m_init(&m2m_ops);
1335 if (IS_ERR(dev->m2m_dev)) {
1336 v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
1337 ret = PTR_ERR(dev->m2m_dev);
1338 dev->m2m_dev = NULL;
1339 goto error_dev;
1340 }
1341
1342 ret = video_register_device(vfd, VFL_TYPE_VIDEO, 0);
1343 if (ret) {
1344 v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
1345 goto error_m2m;
1346 }
1347
1348 #ifdef CONFIG_MEDIA_CONTROLLER
1349 dev->mdev.dev = &pdev->dev;
1350 strscpy(dev->mdev.model, "vim2m", sizeof(dev->mdev.model));
1351 strscpy(dev->mdev.bus_info, "platform:vim2m",
1352 sizeof(dev->mdev.bus_info));
1353 media_device_init(&dev->mdev);
1354 dev->mdev.ops = &m2m_media_ops;
1355 dev->v4l2_dev.mdev = &dev->mdev;
1356
1357 ret = v4l2_m2m_register_media_controller(dev->m2m_dev, vfd,
1358 MEDIA_ENT_F_PROC_VIDEO_SCALER);
1359 if (ret) {
1360 v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller\n");
1361 goto error_v4l2;
1362 }
1363
1364 ret = media_device_register(&dev->mdev);
1365 if (ret) {
1366 v4l2_err(&dev->v4l2_dev, "Failed to register mem2mem media device\n");
1367 goto error_m2m_mc;
1368 }
1369 #endif
1370 return 0;
1371
1372 #ifdef CONFIG_MEDIA_CONTROLLER
1373 error_m2m_mc:
1374 v4l2_m2m_unregister_media_controller(dev->m2m_dev);
1375 #endif
1376 error_v4l2:
1377 video_unregister_device(&dev->vfd);
1378 /* vim2m_device_release called by video_unregister_device to release various objects */
1379 return ret;
1380 error_m2m:
1381 v4l2_m2m_release(dev->m2m_dev);
1382 error_dev:
1383 v4l2_device_unregister(&dev->v4l2_dev);
1384 error_free:
1385 kfree(dev);
1386
1387 return ret;
1388 }
1389
1390 static int vim2m_remove(struct platform_device *pdev)
1391 {
1392 struct vim2m_dev *dev = platform_get_drvdata(pdev);
1393
1394 v4l2_info(&dev->v4l2_dev, "Removing " MEM2MEM_NAME);
1395
1396 #ifdef CONFIG_MEDIA_CONTROLLER
1397 media_device_unregister(&dev->mdev);
1398 v4l2_m2m_unregister_media_controller(dev->m2m_dev);
1399 #endif
1400 video_unregister_device(&dev->vfd);
1401
1402 return 0;
1403 }
1404
1405 static struct platform_driver vim2m_pdrv = {
1406 .probe = vim2m_probe,
1407 .remove = vim2m_remove,
1408 .driver = {
1409 .name = MEM2MEM_NAME,
1410 },
1411 };
1412
1413 static void __exit vim2m_exit(void)
1414 {
1415 platform_driver_unregister(&vim2m_pdrv);
1416 platform_device_unregister(&vim2m_pdev);
1417 }
1418
1419 static int __init vim2m_init(void)
1420 {
1421 int ret;
1422
1423 ret = platform_device_register(&vim2m_pdev);
1424 if (ret)
1425 return ret;
1426
1427 ret = platform_driver_register(&vim2m_pdrv);
1428 if (ret)
1429 platform_device_unregister(&vim2m_pdev);
1430
1431 return ret;
1432 }
1433
1434 module_init(vim2m_init);
1435 module_exit(vim2m_exit);
Linux with added FPC-III support