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96d8eab5 PO |
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 timer). | |
7 | * The device is capable of multi-instance, multi-buffer-per-transaction | |
8 | * operation (via the mem2mem framework). | |
9 | * | |
10 | * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd. | |
11 | * Pawel Osciak, <p.osciak@samsung.com> | |
12 | * Marek Szyprowski, <m.szyprowski@samsung.com> | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License as published by the | |
16 | * Free Software Foundation; either version 2 of the | |
17 | * License, or (at your option) any later version | |
18 | */ | |
19 | #include <linux/module.h> | |
20 | #include <linux/delay.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/version.h> | |
23 | #include <linux/timer.h> | |
24 | #include <linux/sched.h> | |
6b46c397 | 25 | #include <linux/slab.h> |
96d8eab5 PO |
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> | |
d80ee38c | 31 | #include <media/videobuf2-vmalloc.h> |
96d8eab5 PO |
32 | |
33 | #define MEM2MEM_TEST_MODULE_NAME "mem2mem-testdev" | |
34 | ||
35 | MODULE_DESCRIPTION("Virtual device for mem2mem framework testing"); | |
36 | MODULE_AUTHOR("Pawel Osciak, <p.osciak@samsung.com>"); | |
37 | MODULE_LICENSE("GPL"); | |
38 | ||
39 | ||
40 | #define MIN_W 32 | |
41 | #define MIN_H 32 | |
42 | #define MAX_W 640 | |
43 | #define MAX_H 480 | |
44 | #define DIM_ALIGN_MASK 0x08 /* 8-alignment for dimensions */ | |
45 | ||
46 | /* Flags that indicate a format can be used for capture/output */ | |
47 | #define MEM2MEM_CAPTURE (1 << 0) | |
48 | #define MEM2MEM_OUTPUT (1 << 1) | |
49 | ||
50 | #define MEM2MEM_NAME "m2m-testdev" | |
51 | ||
52 | /* Per queue */ | |
53 | #define MEM2MEM_DEF_NUM_BUFS VIDEO_MAX_FRAME | |
54 | /* In bytes, per queue */ | |
55 | #define MEM2MEM_VID_MEM_LIMIT (16 * 1024 * 1024) | |
56 | ||
57 | /* Default transaction time in msec */ | |
58 | #define MEM2MEM_DEF_TRANSTIME 1000 | |
59 | /* Default number of buffers per transaction */ | |
60 | #define MEM2MEM_DEF_TRANSLEN 1 | |
61 | #define MEM2MEM_COLOR_STEP (0xff >> 4) | |
62 | #define MEM2MEM_NUM_TILES 8 | |
63 | ||
64 | #define dprintk(dev, fmt, arg...) \ | |
65 | v4l2_dbg(1, 1, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg) | |
66 | ||
67 | ||
68 | void m2mtest_dev_release(struct device *dev) | |
69 | {} | |
70 | ||
71 | static struct platform_device m2mtest_pdev = { | |
72 | .name = MEM2MEM_NAME, | |
73 | .dev.release = m2mtest_dev_release, | |
74 | }; | |
75 | ||
76 | struct m2mtest_fmt { | |
77 | char *name; | |
78 | u32 fourcc; | |
79 | int depth; | |
80 | /* Types the format can be used for */ | |
81 | u32 types; | |
82 | }; | |
83 | ||
84 | static struct m2mtest_fmt formats[] = { | |
85 | { | |
86 | .name = "RGB565 (BE)", | |
87 | .fourcc = V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */ | |
88 | .depth = 16, | |
89 | /* Both capture and output format */ | |
90 | .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT, | |
91 | }, | |
92 | { | |
93 | .name = "4:2:2, packed, YUYV", | |
94 | .fourcc = V4L2_PIX_FMT_YUYV, | |
95 | .depth = 16, | |
96 | /* Output-only format */ | |
97 | .types = MEM2MEM_OUTPUT, | |
98 | }, | |
99 | }; | |
100 | ||
101 | /* Per-queue, driver-specific private data */ | |
102 | struct m2mtest_q_data { | |
103 | unsigned int width; | |
104 | unsigned int height; | |
105 | unsigned int sizeimage; | |
106 | struct m2mtest_fmt *fmt; | |
107 | }; | |
108 | ||
109 | enum { | |
110 | V4L2_M2M_SRC = 0, | |
111 | V4L2_M2M_DST = 1, | |
112 | }; | |
113 | ||
114 | /* Source and destination queue data */ | |
115 | static struct m2mtest_q_data q_data[2]; | |
116 | ||
117 | static struct m2mtest_q_data *get_q_data(enum v4l2_buf_type type) | |
118 | { | |
119 | switch (type) { | |
120 | case V4L2_BUF_TYPE_VIDEO_OUTPUT: | |
121 | return &q_data[V4L2_M2M_SRC]; | |
122 | case V4L2_BUF_TYPE_VIDEO_CAPTURE: | |
123 | return &q_data[V4L2_M2M_DST]; | |
124 | default: | |
125 | BUG(); | |
126 | } | |
127 | return NULL; | |
128 | } | |
129 | ||
130 | #define V4L2_CID_TRANS_TIME_MSEC V4L2_CID_PRIVATE_BASE | |
131 | #define V4L2_CID_TRANS_NUM_BUFS (V4L2_CID_PRIVATE_BASE + 1) | |
132 | ||
133 | static struct v4l2_queryctrl m2mtest_ctrls[] = { | |
134 | { | |
135 | .id = V4L2_CID_TRANS_TIME_MSEC, | |
136 | .type = V4L2_CTRL_TYPE_INTEGER, | |
137 | .name = "Transaction time (msec)", | |
138 | .minimum = 1, | |
139 | .maximum = 10000, | |
140 | .step = 100, | |
141 | .default_value = 1000, | |
142 | .flags = 0, | |
143 | }, { | |
144 | .id = V4L2_CID_TRANS_NUM_BUFS, | |
145 | .type = V4L2_CTRL_TYPE_INTEGER, | |
146 | .name = "Buffers per transaction", | |
147 | .minimum = 1, | |
148 | .maximum = MEM2MEM_DEF_NUM_BUFS, | |
149 | .step = 1, | |
150 | .default_value = 1, | |
151 | .flags = 0, | |
152 | }, | |
153 | }; | |
154 | ||
155 | #define NUM_FORMATS ARRAY_SIZE(formats) | |
156 | ||
157 | static struct m2mtest_fmt *find_format(struct v4l2_format *f) | |
158 | { | |
159 | struct m2mtest_fmt *fmt; | |
160 | unsigned int k; | |
161 | ||
162 | for (k = 0; k < NUM_FORMATS; k++) { | |
163 | fmt = &formats[k]; | |
164 | if (fmt->fourcc == f->fmt.pix.pixelformat) | |
165 | break; | |
166 | } | |
167 | ||
168 | if (k == NUM_FORMATS) | |
169 | return NULL; | |
170 | ||
171 | return &formats[k]; | |
172 | } | |
173 | ||
174 | struct m2mtest_dev { | |
175 | struct v4l2_device v4l2_dev; | |
176 | struct video_device *vfd; | |
177 | ||
178 | atomic_t num_inst; | |
179 | struct mutex dev_mutex; | |
180 | spinlock_t irqlock; | |
181 | ||
182 | struct timer_list timer; | |
183 | ||
184 | struct v4l2_m2m_dev *m2m_dev; | |
185 | }; | |
186 | ||
187 | struct m2mtest_ctx { | |
188 | struct m2mtest_dev *dev; | |
189 | ||
190 | /* Processed buffers in this transaction */ | |
191 | u8 num_processed; | |
192 | ||
193 | /* Transaction length (i.e. how many buffers per transaction) */ | |
194 | u32 translen; | |
195 | /* Transaction time (i.e. simulated processing time) in milliseconds */ | |
196 | u32 transtime; | |
197 | ||
198 | /* Abort requested by m2m */ | |
199 | int aborting; | |
200 | ||
201 | struct v4l2_m2m_ctx *m2m_ctx; | |
202 | }; | |
203 | ||
96d8eab5 PO |
204 | static struct v4l2_queryctrl *get_ctrl(int id) |
205 | { | |
206 | int i; | |
207 | ||
208 | for (i = 0; i < ARRAY_SIZE(m2mtest_ctrls); ++i) { | |
209 | if (id == m2mtest_ctrls[i].id) | |
210 | return &m2mtest_ctrls[i]; | |
211 | } | |
212 | ||
213 | return NULL; | |
214 | } | |
215 | ||
216 | static int device_process(struct m2mtest_ctx *ctx, | |
d80ee38c MS |
217 | struct vb2_buffer *in_vb, |
218 | struct vb2_buffer *out_vb) | |
96d8eab5 PO |
219 | { |
220 | struct m2mtest_dev *dev = ctx->dev; | |
d80ee38c | 221 | struct m2mtest_q_data *q_data; |
96d8eab5 PO |
222 | u8 *p_in, *p_out; |
223 | int x, y, t, w; | |
224 | int tile_w, bytes_left; | |
d80ee38c | 225 | int width, height, bytesperline; |
96d8eab5 | 226 | |
d80ee38c MS |
227 | q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT); |
228 | ||
229 | width = q_data->width; | |
230 | height = q_data->height; | |
231 | bytesperline = (q_data->width * q_data->fmt->depth) >> 3; | |
232 | ||
233 | p_in = vb2_plane_vaddr(in_vb, 0); | |
234 | p_out = vb2_plane_vaddr(out_vb, 0); | |
96d8eab5 PO |
235 | if (!p_in || !p_out) { |
236 | v4l2_err(&dev->v4l2_dev, | |
237 | "Acquiring kernel pointers to buffers failed\n"); | |
238 | return -EFAULT; | |
239 | } | |
240 | ||
d80ee38c | 241 | if (vb2_plane_size(in_vb, 0) > vb2_plane_size(out_vb, 0)) { |
96d8eab5 PO |
242 | v4l2_err(&dev->v4l2_dev, "Output buffer is too small\n"); |
243 | return -EINVAL; | |
244 | } | |
245 | ||
d80ee38c | 246 | tile_w = (width * (q_data[V4L2_M2M_DST].fmt->depth >> 3)) |
96d8eab5 | 247 | / MEM2MEM_NUM_TILES; |
d80ee38c | 248 | bytes_left = bytesperline - tile_w * MEM2MEM_NUM_TILES; |
96d8eab5 PO |
249 | w = 0; |
250 | ||
d80ee38c | 251 | for (y = 0; y < height; ++y) { |
96d8eab5 PO |
252 | for (t = 0; t < MEM2MEM_NUM_TILES; ++t) { |
253 | if (w & 0x1) { | |
254 | for (x = 0; x < tile_w; ++x) | |
255 | *p_out++ = *p_in++ + MEM2MEM_COLOR_STEP; | |
256 | } else { | |
257 | for (x = 0; x < tile_w; ++x) | |
258 | *p_out++ = *p_in++ - MEM2MEM_COLOR_STEP; | |
259 | } | |
260 | ++w; | |
261 | } | |
262 | p_in += bytes_left; | |
263 | p_out += bytes_left; | |
264 | } | |
265 | ||
266 | return 0; | |
267 | } | |
268 | ||
269 | static void schedule_irq(struct m2mtest_dev *dev, int msec_timeout) | |
270 | { | |
271 | dprintk(dev, "Scheduling a simulated irq\n"); | |
272 | mod_timer(&dev->timer, jiffies + msecs_to_jiffies(msec_timeout)); | |
273 | } | |
274 | ||
275 | /* | |
276 | * mem2mem callbacks | |
277 | */ | |
278 | ||
279 | /** | |
280 | * job_ready() - check whether an instance is ready to be scheduled to run | |
281 | */ | |
282 | static int job_ready(void *priv) | |
283 | { | |
284 | struct m2mtest_ctx *ctx = priv; | |
285 | ||
286 | if (v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) < ctx->translen | |
287 | || v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) < ctx->translen) { | |
288 | dprintk(ctx->dev, "Not enough buffers available\n"); | |
289 | return 0; | |
290 | } | |
291 | ||
292 | return 1; | |
293 | } | |
294 | ||
295 | static void job_abort(void *priv) | |
296 | { | |
297 | struct m2mtest_ctx *ctx = priv; | |
298 | ||
299 | /* Will cancel the transaction in the next interrupt handler */ | |
300 | ctx->aborting = 1; | |
301 | } | |
302 | ||
d80ee38c MS |
303 | static void m2mtest_lock(void *priv) |
304 | { | |
305 | struct m2mtest_ctx *ctx = priv; | |
306 | struct m2mtest_dev *dev = ctx->dev; | |
307 | mutex_lock(&dev->dev_mutex); | |
308 | } | |
309 | ||
310 | static void m2mtest_unlock(void *priv) | |
311 | { | |
312 | struct m2mtest_ctx *ctx = priv; | |
313 | struct m2mtest_dev *dev = ctx->dev; | |
314 | mutex_unlock(&dev->dev_mutex); | |
315 | } | |
316 | ||
317 | ||
96d8eab5 PO |
318 | /* device_run() - prepares and starts the device |
319 | * | |
320 | * This simulates all the immediate preparations required before starting | |
321 | * a device. This will be called by the framework when it decides to schedule | |
322 | * a particular instance. | |
323 | */ | |
324 | static void device_run(void *priv) | |
325 | { | |
326 | struct m2mtest_ctx *ctx = priv; | |
327 | struct m2mtest_dev *dev = ctx->dev; | |
d80ee38c | 328 | struct vb2_buffer *src_buf, *dst_buf; |
96d8eab5 PO |
329 | |
330 | src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx); | |
331 | dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx); | |
332 | ||
333 | device_process(ctx, src_buf, dst_buf); | |
334 | ||
335 | /* Run a timer, which simulates a hardware irq */ | |
336 | schedule_irq(dev, ctx->transtime); | |
337 | } | |
338 | ||
96d8eab5 PO |
339 | static void device_isr(unsigned long priv) |
340 | { | |
341 | struct m2mtest_dev *m2mtest_dev = (struct m2mtest_dev *)priv; | |
342 | struct m2mtest_ctx *curr_ctx; | |
d80ee38c | 343 | struct vb2_buffer *src_vb, *dst_vb; |
96d8eab5 PO |
344 | unsigned long flags; |
345 | ||
346 | curr_ctx = v4l2_m2m_get_curr_priv(m2mtest_dev->m2m_dev); | |
347 | ||
348 | if (NULL == curr_ctx) { | |
349 | printk(KERN_ERR | |
350 | "Instance released before the end of transaction\n"); | |
351 | return; | |
352 | } | |
353 | ||
d80ee38c MS |
354 | src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx); |
355 | dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx); | |
356 | ||
96d8eab5 PO |
357 | curr_ctx->num_processed++; |
358 | ||
d80ee38c MS |
359 | spin_lock_irqsave(&m2mtest_dev->irqlock, flags); |
360 | v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE); | |
361 | v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE); | |
362 | spin_unlock_irqrestore(&m2mtest_dev->irqlock, flags); | |
363 | ||
96d8eab5 PO |
364 | if (curr_ctx->num_processed == curr_ctx->translen |
365 | || curr_ctx->aborting) { | |
366 | dprintk(curr_ctx->dev, "Finishing transaction\n"); | |
367 | curr_ctx->num_processed = 0; | |
96d8eab5 PO |
368 | v4l2_m2m_job_finish(m2mtest_dev->m2m_dev, curr_ctx->m2m_ctx); |
369 | } else { | |
96d8eab5 PO |
370 | device_run(curr_ctx); |
371 | } | |
372 | } | |
373 | ||
96d8eab5 PO |
374 | /* |
375 | * video ioctls | |
376 | */ | |
377 | static int vidioc_querycap(struct file *file, void *priv, | |
378 | struct v4l2_capability *cap) | |
379 | { | |
380 | strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1); | |
381 | strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1); | |
382 | cap->bus_info[0] = 0; | |
383 | cap->version = KERNEL_VERSION(0, 1, 0); | |
384 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT | |
385 | | V4L2_CAP_STREAMING; | |
386 | ||
387 | return 0; | |
388 | } | |
389 | ||
390 | static int enum_fmt(struct v4l2_fmtdesc *f, u32 type) | |
391 | { | |
392 | int i, num; | |
393 | struct m2mtest_fmt *fmt; | |
394 | ||
395 | num = 0; | |
396 | ||
397 | for (i = 0; i < NUM_FORMATS; ++i) { | |
398 | if (formats[i].types & type) { | |
399 | /* index-th format of type type found ? */ | |
400 | if (num == f->index) | |
401 | break; | |
402 | /* Correct type but haven't reached our index yet, | |
403 | * just increment per-type index */ | |
404 | ++num; | |
405 | } | |
406 | } | |
407 | ||
408 | if (i < NUM_FORMATS) { | |
409 | /* Format found */ | |
410 | fmt = &formats[i]; | |
411 | strncpy(f->description, fmt->name, sizeof(f->description) - 1); | |
412 | f->pixelformat = fmt->fourcc; | |
413 | return 0; | |
414 | } | |
415 | ||
416 | /* Format not found */ | |
417 | return -EINVAL; | |
418 | } | |
419 | ||
420 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, | |
421 | struct v4l2_fmtdesc *f) | |
422 | { | |
423 | return enum_fmt(f, MEM2MEM_CAPTURE); | |
424 | } | |
425 | ||
426 | static int vidioc_enum_fmt_vid_out(struct file *file, void *priv, | |
427 | struct v4l2_fmtdesc *f) | |
428 | { | |
429 | return enum_fmt(f, MEM2MEM_OUTPUT); | |
430 | } | |
431 | ||
432 | static int vidioc_g_fmt(struct m2mtest_ctx *ctx, struct v4l2_format *f) | |
433 | { | |
d80ee38c | 434 | struct vb2_queue *vq; |
96d8eab5 PO |
435 | struct m2mtest_q_data *q_data; |
436 | ||
437 | vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); | |
438 | if (!vq) | |
439 | return -EINVAL; | |
440 | ||
441 | q_data = get_q_data(f->type); | |
442 | ||
443 | f->fmt.pix.width = q_data->width; | |
444 | f->fmt.pix.height = q_data->height; | |
d80ee38c | 445 | f->fmt.pix.field = V4L2_FIELD_NONE; |
96d8eab5 PO |
446 | f->fmt.pix.pixelformat = q_data->fmt->fourcc; |
447 | f->fmt.pix.bytesperline = (q_data->width * q_data->fmt->depth) >> 3; | |
448 | f->fmt.pix.sizeimage = q_data->sizeimage; | |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
453 | static int vidioc_g_fmt_vid_out(struct file *file, void *priv, | |
454 | struct v4l2_format *f) | |
455 | { | |
456 | return vidioc_g_fmt(priv, f); | |
457 | } | |
458 | ||
459 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, | |
460 | struct v4l2_format *f) | |
461 | { | |
462 | return vidioc_g_fmt(priv, f); | |
463 | } | |
464 | ||
465 | static int vidioc_try_fmt(struct v4l2_format *f, struct m2mtest_fmt *fmt) | |
466 | { | |
467 | enum v4l2_field field; | |
468 | ||
469 | field = f->fmt.pix.field; | |
470 | ||
471 | if (field == V4L2_FIELD_ANY) | |
472 | field = V4L2_FIELD_NONE; | |
473 | else if (V4L2_FIELD_NONE != field) | |
474 | return -EINVAL; | |
475 | ||
476 | /* V4L2 specification suggests the driver corrects the format struct | |
477 | * if any of the dimensions is unsupported */ | |
478 | f->fmt.pix.field = field; | |
479 | ||
480 | if (f->fmt.pix.height < MIN_H) | |
481 | f->fmt.pix.height = MIN_H; | |
482 | else if (f->fmt.pix.height > MAX_H) | |
483 | f->fmt.pix.height = MAX_H; | |
484 | ||
485 | if (f->fmt.pix.width < MIN_W) | |
486 | f->fmt.pix.width = MIN_W; | |
487 | else if (f->fmt.pix.width > MAX_W) | |
488 | f->fmt.pix.width = MAX_W; | |
489 | ||
490 | f->fmt.pix.width &= ~DIM_ALIGN_MASK; | |
491 | f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3; | |
492 | f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; | |
493 | ||
494 | return 0; | |
495 | } | |
496 | ||
497 | static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, | |
498 | struct v4l2_format *f) | |
499 | { | |
500 | struct m2mtest_fmt *fmt; | |
501 | struct m2mtest_ctx *ctx = priv; | |
502 | ||
503 | fmt = find_format(f); | |
504 | if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) { | |
505 | v4l2_err(&ctx->dev->v4l2_dev, | |
506 | "Fourcc format (0x%08x) invalid.\n", | |
507 | f->fmt.pix.pixelformat); | |
508 | return -EINVAL; | |
509 | } | |
510 | ||
511 | return vidioc_try_fmt(f, fmt); | |
512 | } | |
513 | ||
514 | static int vidioc_try_fmt_vid_out(struct file *file, void *priv, | |
515 | struct v4l2_format *f) | |
516 | { | |
517 | struct m2mtest_fmt *fmt; | |
518 | struct m2mtest_ctx *ctx = priv; | |
519 | ||
520 | fmt = find_format(f); | |
521 | if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) { | |
522 | v4l2_err(&ctx->dev->v4l2_dev, | |
523 | "Fourcc format (0x%08x) invalid.\n", | |
524 | f->fmt.pix.pixelformat); | |
525 | return -EINVAL; | |
526 | } | |
527 | ||
528 | return vidioc_try_fmt(f, fmt); | |
529 | } | |
530 | ||
531 | static int vidioc_s_fmt(struct m2mtest_ctx *ctx, struct v4l2_format *f) | |
532 | { | |
533 | struct m2mtest_q_data *q_data; | |
d80ee38c | 534 | struct vb2_queue *vq; |
96d8eab5 PO |
535 | |
536 | vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); | |
537 | if (!vq) | |
538 | return -EINVAL; | |
539 | ||
540 | q_data = get_q_data(f->type); | |
541 | if (!q_data) | |
542 | return -EINVAL; | |
543 | ||
d80ee38c | 544 | if (vb2_is_busy(vq)) { |
96d8eab5 | 545 | v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__); |
07e80305 | 546 | return -EBUSY; |
96d8eab5 PO |
547 | } |
548 | ||
549 | q_data->fmt = find_format(f); | |
550 | q_data->width = f->fmt.pix.width; | |
551 | q_data->height = f->fmt.pix.height; | |
552 | q_data->sizeimage = q_data->width * q_data->height | |
553 | * q_data->fmt->depth >> 3; | |
96d8eab5 PO |
554 | |
555 | dprintk(ctx->dev, | |
556 | "Setting format for type %d, wxh: %dx%d, fmt: %d\n", | |
557 | f->type, q_data->width, q_data->height, q_data->fmt->fourcc); | |
558 | ||
07e80305 | 559 | return 0; |
96d8eab5 PO |
560 | } |
561 | ||
562 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, | |
563 | struct v4l2_format *f) | |
564 | { | |
565 | int ret; | |
566 | ||
567 | ret = vidioc_try_fmt_vid_cap(file, priv, f); | |
568 | if (ret) | |
569 | return ret; | |
570 | ||
571 | return vidioc_s_fmt(priv, f); | |
572 | } | |
573 | ||
574 | static int vidioc_s_fmt_vid_out(struct file *file, void *priv, | |
575 | struct v4l2_format *f) | |
576 | { | |
577 | int ret; | |
578 | ||
579 | ret = vidioc_try_fmt_vid_out(file, priv, f); | |
580 | if (ret) | |
581 | return ret; | |
582 | ||
583 | return vidioc_s_fmt(priv, f); | |
584 | } | |
585 | ||
586 | static int vidioc_reqbufs(struct file *file, void *priv, | |
587 | struct v4l2_requestbuffers *reqbufs) | |
588 | { | |
589 | struct m2mtest_ctx *ctx = priv; | |
590 | ||
591 | return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs); | |
592 | } | |
593 | ||
594 | static int vidioc_querybuf(struct file *file, void *priv, | |
595 | struct v4l2_buffer *buf) | |
596 | { | |
597 | struct m2mtest_ctx *ctx = priv; | |
598 | ||
599 | return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf); | |
600 | } | |
601 | ||
602 | static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf) | |
603 | { | |
604 | struct m2mtest_ctx *ctx = priv; | |
605 | ||
606 | return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf); | |
607 | } | |
608 | ||
609 | static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf) | |
610 | { | |
611 | struct m2mtest_ctx *ctx = priv; | |
612 | ||
613 | return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf); | |
614 | } | |
615 | ||
616 | static int vidioc_streamon(struct file *file, void *priv, | |
617 | enum v4l2_buf_type type) | |
618 | { | |
619 | struct m2mtest_ctx *ctx = priv; | |
620 | ||
621 | return v4l2_m2m_streamon(file, ctx->m2m_ctx, type); | |
622 | } | |
623 | ||
624 | static int vidioc_streamoff(struct file *file, void *priv, | |
625 | enum v4l2_buf_type type) | |
626 | { | |
627 | struct m2mtest_ctx *ctx = priv; | |
628 | ||
629 | return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type); | |
630 | } | |
631 | ||
632 | static int vidioc_queryctrl(struct file *file, void *priv, | |
633 | struct v4l2_queryctrl *qc) | |
634 | { | |
635 | struct v4l2_queryctrl *c; | |
636 | ||
637 | c = get_ctrl(qc->id); | |
638 | if (!c) | |
639 | return -EINVAL; | |
640 | ||
641 | *qc = *c; | |
642 | return 0; | |
643 | } | |
644 | ||
645 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
646 | struct v4l2_control *ctrl) | |
647 | { | |
648 | struct m2mtest_ctx *ctx = priv; | |
649 | ||
650 | switch (ctrl->id) { | |
651 | case V4L2_CID_TRANS_TIME_MSEC: | |
652 | ctrl->value = ctx->transtime; | |
653 | break; | |
654 | ||
655 | case V4L2_CID_TRANS_NUM_BUFS: | |
656 | ctrl->value = ctx->translen; | |
657 | break; | |
658 | ||
659 | default: | |
660 | v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n"); | |
661 | return -EINVAL; | |
662 | } | |
663 | ||
664 | return 0; | |
665 | } | |
666 | ||
667 | static int check_ctrl_val(struct m2mtest_ctx *ctx, struct v4l2_control *ctrl) | |
668 | { | |
669 | struct v4l2_queryctrl *c; | |
670 | ||
671 | c = get_ctrl(ctrl->id); | |
672 | if (!c) | |
673 | return -EINVAL; | |
674 | ||
675 | if (ctrl->value < c->minimum || ctrl->value > c->maximum) { | |
676 | v4l2_err(&ctx->dev->v4l2_dev, "Value out of range\n"); | |
677 | return -ERANGE; | |
678 | } | |
679 | ||
680 | return 0; | |
681 | } | |
682 | ||
683 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
684 | struct v4l2_control *ctrl) | |
685 | { | |
686 | struct m2mtest_ctx *ctx = priv; | |
687 | int ret = 0; | |
688 | ||
689 | ret = check_ctrl_val(ctx, ctrl); | |
690 | if (ret != 0) | |
691 | return ret; | |
692 | ||
693 | switch (ctrl->id) { | |
694 | case V4L2_CID_TRANS_TIME_MSEC: | |
695 | ctx->transtime = ctrl->value; | |
696 | break; | |
697 | ||
698 | case V4L2_CID_TRANS_NUM_BUFS: | |
699 | ctx->translen = ctrl->value; | |
700 | break; | |
701 | ||
702 | default: | |
703 | v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n"); | |
704 | return -EINVAL; | |
705 | } | |
706 | ||
707 | return 0; | |
708 | } | |
709 | ||
710 | ||
711 | static const struct v4l2_ioctl_ops m2mtest_ioctl_ops = { | |
712 | .vidioc_querycap = vidioc_querycap, | |
713 | ||
714 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, | |
715 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
716 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
717 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
718 | ||
719 | .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out, | |
720 | .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out, | |
721 | .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out, | |
722 | .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out, | |
723 | ||
724 | .vidioc_reqbufs = vidioc_reqbufs, | |
725 | .vidioc_querybuf = vidioc_querybuf, | |
726 | ||
727 | .vidioc_qbuf = vidioc_qbuf, | |
728 | .vidioc_dqbuf = vidioc_dqbuf, | |
729 | ||
730 | .vidioc_streamon = vidioc_streamon, | |
731 | .vidioc_streamoff = vidioc_streamoff, | |
732 | ||
733 | .vidioc_queryctrl = vidioc_queryctrl, | |
734 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
735 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
736 | }; | |
737 | ||
738 | ||
739 | /* | |
740 | * Queue operations | |
741 | */ | |
742 | ||
d80ee38c MS |
743 | static int m2mtest_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers, |
744 | unsigned int *nplanes, unsigned long sizes[], | |
745 | void *alloc_ctxs[]) | |
96d8eab5 | 746 | { |
d80ee38c | 747 | struct m2mtest_ctx *ctx = vb2_get_drv_priv(vq); |
96d8eab5 | 748 | struct m2mtest_q_data *q_data; |
d80ee38c | 749 | unsigned int size, count = *nbuffers; |
96d8eab5 PO |
750 | |
751 | q_data = get_q_data(vq->type); | |
752 | ||
d80ee38c MS |
753 | size = q_data->width * q_data->height * q_data->fmt->depth >> 3; |
754 | ||
755 | while (size * count > MEM2MEM_VID_MEM_LIMIT) | |
756 | (count)--; | |
96d8eab5 | 757 | |
d80ee38c MS |
758 | *nplanes = 1; |
759 | *nbuffers = count; | |
760 | sizes[0] = size; | |
96d8eab5 | 761 | |
d80ee38c MS |
762 | /* |
763 | * videobuf2-vmalloc allocator is context-less so no need to set | |
764 | * alloc_ctxs array. | |
765 | */ | |
96d8eab5 | 766 | |
d80ee38c | 767 | dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size); |
96d8eab5 PO |
768 | |
769 | return 0; | |
770 | } | |
771 | ||
d80ee38c | 772 | static int m2mtest_buf_prepare(struct vb2_buffer *vb) |
96d8eab5 | 773 | { |
d80ee38c | 774 | struct m2mtest_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); |
96d8eab5 | 775 | struct m2mtest_q_data *q_data; |
96d8eab5 | 776 | |
d80ee38c | 777 | dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type); |
96d8eab5 | 778 | |
d80ee38c | 779 | q_data = get_q_data(vb->vb2_queue->type); |
96d8eab5 | 780 | |
d80ee38c MS |
781 | if (vb2_plane_size(vb, 0) < q_data->sizeimage) { |
782 | dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n", | |
783 | __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage); | |
96d8eab5 PO |
784 | return -EINVAL; |
785 | } | |
786 | ||
d80ee38c | 787 | vb2_set_plane_payload(vb, 0, q_data->sizeimage); |
96d8eab5 PO |
788 | |
789 | return 0; | |
96d8eab5 PO |
790 | } |
791 | ||
d80ee38c | 792 | static void m2mtest_buf_queue(struct vb2_buffer *vb) |
96d8eab5 | 793 | { |
d80ee38c MS |
794 | struct m2mtest_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); |
795 | v4l2_m2m_buf_queue(ctx->m2m_ctx, vb); | |
96d8eab5 PO |
796 | } |
797 | ||
d80ee38c MS |
798 | static struct vb2_ops m2mtest_qops = { |
799 | .queue_setup = m2mtest_queue_setup, | |
800 | .buf_prepare = m2mtest_buf_prepare, | |
801 | .buf_queue = m2mtest_buf_queue, | |
96d8eab5 PO |
802 | }; |
803 | ||
d80ee38c | 804 | static int queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq) |
96d8eab5 PO |
805 | { |
806 | struct m2mtest_ctx *ctx = priv; | |
d80ee38c | 807 | int ret; |
96d8eab5 | 808 | |
d80ee38c MS |
809 | memset(src_vq, 0, sizeof(*src_vq)); |
810 | src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; | |
811 | src_vq->io_modes = VB2_MMAP; | |
812 | src_vq->drv_priv = ctx; | |
813 | src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); | |
814 | src_vq->ops = &m2mtest_qops; | |
815 | src_vq->mem_ops = &vb2_vmalloc_memops; | |
816 | ||
817 | ret = vb2_queue_init(src_vq); | |
818 | if (ret) | |
819 | return ret; | |
96d8eab5 | 820 | |
d80ee38c MS |
821 | memset(dst_vq, 0, sizeof(*dst_vq)); |
822 | dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
823 | dst_vq->io_modes = VB2_MMAP; | |
824 | dst_vq->drv_priv = ctx; | |
825 | dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); | |
826 | dst_vq->ops = &m2mtest_qops; | |
827 | dst_vq->mem_ops = &vb2_vmalloc_memops; | |
828 | ||
829 | return vb2_queue_init(dst_vq); | |
830 | } | |
96d8eab5 PO |
831 | |
832 | /* | |
833 | * File operations | |
834 | */ | |
835 | static int m2mtest_open(struct file *file) | |
836 | { | |
837 | struct m2mtest_dev *dev = video_drvdata(file); | |
838 | struct m2mtest_ctx *ctx = NULL; | |
839 | ||
840 | ctx = kzalloc(sizeof *ctx, GFP_KERNEL); | |
841 | if (!ctx) | |
842 | return -ENOMEM; | |
843 | ||
844 | file->private_data = ctx; | |
845 | ctx->dev = dev; | |
846 | ctx->translen = MEM2MEM_DEF_TRANSLEN; | |
847 | ctx->transtime = MEM2MEM_DEF_TRANSTIME; | |
848 | ctx->num_processed = 0; | |
849 | ||
d80ee38c MS |
850 | ctx->m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init); |
851 | ||
96d8eab5 | 852 | if (IS_ERR(ctx->m2m_ctx)) { |
16ee9bb1 DC |
853 | int ret = PTR_ERR(ctx->m2m_ctx); |
854 | ||
96d8eab5 | 855 | kfree(ctx); |
16ee9bb1 | 856 | return ret; |
96d8eab5 PO |
857 | } |
858 | ||
859 | atomic_inc(&dev->num_inst); | |
860 | ||
861 | dprintk(dev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx); | |
862 | ||
863 | return 0; | |
864 | } | |
865 | ||
866 | static int m2mtest_release(struct file *file) | |
867 | { | |
868 | struct m2mtest_dev *dev = video_drvdata(file); | |
869 | struct m2mtest_ctx *ctx = file->private_data; | |
870 | ||
871 | dprintk(dev, "Releasing instance %p\n", ctx); | |
872 | ||
873 | v4l2_m2m_ctx_release(ctx->m2m_ctx); | |
874 | kfree(ctx); | |
875 | ||
876 | atomic_dec(&dev->num_inst); | |
877 | ||
878 | return 0; | |
879 | } | |
880 | ||
881 | static unsigned int m2mtest_poll(struct file *file, | |
882 | struct poll_table_struct *wait) | |
883 | { | |
abf84383 | 884 | struct m2mtest_ctx *ctx = file->private_data; |
96d8eab5 PO |
885 | |
886 | return v4l2_m2m_poll(file, ctx->m2m_ctx, wait); | |
887 | } | |
888 | ||
889 | static int m2mtest_mmap(struct file *file, struct vm_area_struct *vma) | |
890 | { | |
abf84383 | 891 | struct m2mtest_ctx *ctx = file->private_data; |
96d8eab5 PO |
892 | |
893 | return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma); | |
894 | } | |
895 | ||
896 | static const struct v4l2_file_operations m2mtest_fops = { | |
897 | .owner = THIS_MODULE, | |
898 | .open = m2mtest_open, | |
899 | .release = m2mtest_release, | |
900 | .poll = m2mtest_poll, | |
07e80305 | 901 | .unlocked_ioctl = video_ioctl2, |
96d8eab5 PO |
902 | .mmap = m2mtest_mmap, |
903 | }; | |
904 | ||
905 | static struct video_device m2mtest_videodev = { | |
906 | .name = MEM2MEM_NAME, | |
907 | .fops = &m2mtest_fops, | |
908 | .ioctl_ops = &m2mtest_ioctl_ops, | |
909 | .minor = -1, | |
910 | .release = video_device_release, | |
911 | }; | |
912 | ||
913 | static struct v4l2_m2m_ops m2m_ops = { | |
914 | .device_run = device_run, | |
915 | .job_ready = job_ready, | |
916 | .job_abort = job_abort, | |
d80ee38c MS |
917 | .lock = m2mtest_lock, |
918 | .unlock = m2mtest_unlock, | |
96d8eab5 PO |
919 | }; |
920 | ||
921 | static int m2mtest_probe(struct platform_device *pdev) | |
922 | { | |
923 | struct m2mtest_dev *dev; | |
924 | struct video_device *vfd; | |
925 | int ret; | |
926 | ||
927 | dev = kzalloc(sizeof *dev, GFP_KERNEL); | |
928 | if (!dev) | |
929 | return -ENOMEM; | |
930 | ||
931 | spin_lock_init(&dev->irqlock); | |
932 | ||
933 | ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev); | |
934 | if (ret) | |
935 | goto free_dev; | |
936 | ||
937 | atomic_set(&dev->num_inst, 0); | |
938 | mutex_init(&dev->dev_mutex); | |
939 | ||
940 | vfd = video_device_alloc(); | |
941 | if (!vfd) { | |
942 | v4l2_err(&dev->v4l2_dev, "Failed to allocate video device\n"); | |
943 | ret = -ENOMEM; | |
944 | goto unreg_dev; | |
945 | } | |
946 | ||
947 | *vfd = m2mtest_videodev; | |
07e80305 | 948 | vfd->lock = &dev->dev_mutex; |
96d8eab5 PO |
949 | |
950 | ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0); | |
951 | if (ret) { | |
952 | v4l2_err(&dev->v4l2_dev, "Failed to register video device\n"); | |
953 | goto rel_vdev; | |
954 | } | |
955 | ||
956 | video_set_drvdata(vfd, dev); | |
957 | snprintf(vfd->name, sizeof(vfd->name), "%s", m2mtest_videodev.name); | |
958 | dev->vfd = vfd; | |
959 | v4l2_info(&dev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME | |
960 | "Device registered as /dev/video%d\n", vfd->num); | |
961 | ||
962 | setup_timer(&dev->timer, device_isr, (long)dev); | |
963 | platform_set_drvdata(pdev, dev); | |
964 | ||
965 | dev->m2m_dev = v4l2_m2m_init(&m2m_ops); | |
966 | if (IS_ERR(dev->m2m_dev)) { | |
967 | v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n"); | |
968 | ret = PTR_ERR(dev->m2m_dev); | |
969 | goto err_m2m; | |
970 | } | |
971 | ||
b6ae906b PO |
972 | q_data[V4L2_M2M_SRC].fmt = &formats[0]; |
973 | q_data[V4L2_M2M_DST].fmt = &formats[0]; | |
974 | ||
96d8eab5 PO |
975 | return 0; |
976 | ||
d80ee38c | 977 | v4l2_m2m_release(dev->m2m_dev); |
96d8eab5 PO |
978 | err_m2m: |
979 | video_unregister_device(dev->vfd); | |
980 | rel_vdev: | |
981 | video_device_release(vfd); | |
982 | unreg_dev: | |
983 | v4l2_device_unregister(&dev->v4l2_dev); | |
984 | free_dev: | |
985 | kfree(dev); | |
986 | ||
987 | return ret; | |
988 | } | |
989 | ||
990 | static int m2mtest_remove(struct platform_device *pdev) | |
991 | { | |
992 | struct m2mtest_dev *dev = | |
993 | (struct m2mtest_dev *)platform_get_drvdata(pdev); | |
994 | ||
995 | v4l2_info(&dev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME); | |
996 | v4l2_m2m_release(dev->m2m_dev); | |
997 | del_timer_sync(&dev->timer); | |
998 | video_unregister_device(dev->vfd); | |
999 | v4l2_device_unregister(&dev->v4l2_dev); | |
1000 | kfree(dev); | |
1001 | ||
1002 | return 0; | |
1003 | } | |
1004 | ||
1005 | static struct platform_driver m2mtest_pdrv = { | |
1006 | .probe = m2mtest_probe, | |
1007 | .remove = m2mtest_remove, | |
1008 | .driver = { | |
1009 | .name = MEM2MEM_NAME, | |
1010 | .owner = THIS_MODULE, | |
1011 | }, | |
1012 | }; | |
1013 | ||
1014 | static void __exit m2mtest_exit(void) | |
1015 | { | |
1016 | platform_driver_unregister(&m2mtest_pdrv); | |
1017 | platform_device_unregister(&m2mtest_pdev); | |
1018 | } | |
1019 | ||
1020 | static int __init m2mtest_init(void) | |
1021 | { | |
1022 | int ret; | |
1023 | ||
1024 | ret = platform_device_register(&m2mtest_pdev); | |
1025 | if (ret) | |
1026 | return ret; | |
1027 | ||
1028 | ret = platform_driver_register(&m2mtest_pdrv); | |
1029 | if (ret) | |
1030 | platform_device_unregister(&m2mtest_pdev); | |
1031 | ||
1032 | return 0; | |
1033 | } | |
1034 | ||
1035 | module_init(m2mtest_init); | |
1036 | module_exit(m2mtest_exit); | |
1037 |