projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[media] media: Add mem2mem deinterlacing driver
[deliverable/linux.git] / drivers / media / video / m2m-deinterlace.c
CommitLineData
8f0755c0
JM		 1/*
2 * V4L2 deinterlacing support.
3 *
4 * Copyright (c) 2012 Vista Silicon S.L.
5 * Javier Martin <javier.martin@vista-silicon.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the
10 * License, or (at your option) any later version
11 */
12
13#include <linux/module.h>
14#include <linux/slab.h>
15#include <linux/interrupt.h>
16#include <linux/dmaengine.h>
17#include <linux/platform_device.h>
18
19#include <media/v4l2-mem2mem.h>
20#include <media/v4l2-device.h>
21#include <media/v4l2-ioctl.h>
22#include <media/videobuf2-dma-contig.h>
23
24#define MEM2MEM_TEST_MODULE_NAME "mem2mem-deinterlace"
25
26MODULE_DESCRIPTION("mem2mem device which supports deinterlacing using dmaengine");
27MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com");
28MODULE_LICENSE("GPL");
29MODULE_VERSION("0.0.1");
30
31static bool debug = true;
32module_param(debug, bool, 0644);
33
34/* Flags that indicate a format can be used for capture/output */
35#define MEM2MEM_CAPTURE (1 << 0)
36#define MEM2MEM_OUTPUT (1 << 1)
37
38#define MEM2MEM_NAME "m2m-deinterlace"
39
40#define dprintk(dev, fmt, arg...) \
41 v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
42
43struct deinterlace_fmt {
44 char *name;
45 u32 fourcc;
46 /* Types the format can be used for */
47 u32 types;
48};
49
50static struct deinterlace_fmt formats[] = {
51 {
52 .name = "YUV 4:2:0 Planar",
53 .fourcc = V4L2_PIX_FMT_YUV420,
54 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
55 },
56 {
57 .name = "YUYV 4:2:2",
58 .fourcc = V4L2_PIX_FMT_YUYV,
59 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
60 },
61};
62
63#define NUM_FORMATS ARRAY_SIZE(formats)
64
65/* Per-queue, driver-specific private data */
66struct deinterlace_q_data {
67 unsigned int width;
68 unsigned int height;
69 unsigned int sizeimage;
70 struct deinterlace_fmt *fmt;
71 enum v4l2_field field;
72};
73
74enum {
75 V4L2_M2M_SRC = 0,
76 V4L2_M2M_DST = 1,
77};
78
79enum {
80 YUV420_DMA_Y_ODD,
81 YUV420_DMA_Y_EVEN,
82 YUV420_DMA_U_ODD,
83 YUV420_DMA_U_EVEN,
84 YUV420_DMA_V_ODD,
85 YUV420_DMA_V_EVEN,
86 YUV420_DMA_Y_ODD_DOUBLING,
87 YUV420_DMA_U_ODD_DOUBLING,
88 YUV420_DMA_V_ODD_DOUBLING,
89 YUYV_DMA_ODD,
90 YUYV_DMA_EVEN,
91 YUYV_DMA_EVEN_DOUBLING,
92};
93
94/* Source and destination queue data */
95static struct deinterlace_q_data q_data[2];
96
97static struct deinterlace_q_data *get_q_data(enum v4l2_buf_type type)
98{
99 switch (type) {
100 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
101 return &q_data[V4L2_M2M_SRC];
102 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
103 return &q_data[V4L2_M2M_DST];
104 default:
105 BUG();
106 }
107 return NULL;
108}
109
110static struct deinterlace_fmt *find_format(struct v4l2_format *f)
111{
112 struct deinterlace_fmt *fmt;
113 unsigned int k;
114
115 for (k = 0; k < NUM_FORMATS; k++) {
116 fmt = &formats[k];
117 if ((fmt->types & f->type) &&
118 (fmt->fourcc == f->fmt.pix.pixelformat))
119 break;
120 }
121
122 if (k == NUM_FORMATS)
123 return NULL;
124
125 return &formats[k];
126}
127
128struct deinterlace_dev {
129 struct v4l2_device v4l2_dev;
130 struct video_device *vfd;
131
132 atomic_t busy;
133 struct mutex dev_mutex;
134 spinlock_t irqlock;
135
136 struct dma_chan *dma_chan;
137
138 struct v4l2_m2m_dev *m2m_dev;
139 struct vb2_alloc_ctx *alloc_ctx;
140};
141
142struct deinterlace_ctx {
143 struct deinterlace_dev *dev;
144
145 /* Abort requested by m2m */
146 int aborting;
147 enum v4l2_colorspace colorspace;
148 dma_cookie_t cookie;
149 struct v4l2_m2m_ctx *m2m_ctx;
150 struct dma_interleaved_template *xt;
151};
152
153/*
154 * mem2mem callbacks
155 */
156static int deinterlace_job_ready(void *priv)
157{
158 struct deinterlace_ctx *ctx = priv;
159 struct deinterlace_dev *pcdev = ctx->dev;
160
161 if ((v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) > 0)
162 && (v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) > 0)
163 && (atomic_read(&ctx->dev->busy) == 0)) {
164 dprintk(pcdev, "Task ready\n");
165 return 1;
166 }
167
168 dprintk(pcdev, "Task not ready to run\n");
169
170 return 0;
171}
172
173static void deinterlace_job_abort(void *priv)
174{
175 struct deinterlace_ctx *ctx = priv;
176 struct deinterlace_dev *pcdev = ctx->dev;
177
178 ctx->aborting = 1;
179
180 dprintk(pcdev, "Aborting task\n");
181
182 v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx);
183}
184
185static void deinterlace_lock(void *priv)
186{
187 struct deinterlace_ctx *ctx = priv;
188 struct deinterlace_dev *pcdev = ctx->dev;
189 mutex_lock(&pcdev->dev_mutex);
190}
191
192static void deinterlace_unlock(void *priv)
193{
194 struct deinterlace_ctx *ctx = priv;
195 struct deinterlace_dev *pcdev = ctx->dev;
196 mutex_unlock(&pcdev->dev_mutex);
197}
198
199static void dma_callback(void *data)
200{
201 struct deinterlace_ctx *curr_ctx = data;
202 struct deinterlace_dev *pcdev = curr_ctx->dev;
203 struct vb2_buffer *src_vb, *dst_vb;
204
205 atomic_set(&pcdev->busy, 0);
206
207 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
208 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
209
210 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
211 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
212
213 v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
214
215 dprintk(pcdev, "dma transfers completed.\n");
216}
217
218static void deinterlace_issue_dma(struct deinterlace_ctx *ctx, int op,
219 int do_callback)
220{
221 struct deinterlace_q_data *s_q_data, *d_q_data;
222 struct vb2_buffer *src_buf, *dst_buf;
223 struct deinterlace_dev *pcdev = ctx->dev;
224 struct dma_chan *chan = pcdev->dma_chan;
225 struct dma_device *dmadev = chan->device;
226 struct dma_async_tx_descriptor *tx;
227 unsigned int s_width, s_height;
228 unsigned int d_width, d_height;
229 unsigned int d_size, s_size;
230 dma_addr_t p_in, p_out;
231 enum dma_ctrl_flags flags;
232
233 src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
234 dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
235
236 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
237 s_width = s_q_data->width;
238 s_height = s_q_data->height;
239 s_size = s_width * s_height;
240
241 d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
242 d_width = d_q_data->width;
243 d_height = d_q_data->height;
244 d_size = d_width * d_height;
245
246 p_in = (dma_addr_t)vb2_dma_contig_plane_dma_addr(src_buf, 0);
247 p_out = (dma_addr_t)vb2_dma_contig_plane_dma_addr(dst_buf, 0);
248 if (!p_in || !p_out) {
249 v4l2_err(&pcdev->v4l2_dev,
250 "Acquiring kernel pointers to buffers failed\n");
251 return;
252 }
253
254 switch (op) {
255 case YUV420_DMA_Y_ODD:
256 ctx->xt->numf = s_height / 2;
257 ctx->xt->sgl[0].size = s_width;
258 ctx->xt->sgl[0].icg = s_width;
259 ctx->xt->src_start = p_in;
260 ctx->xt->dst_start = p_out;
261 break;
262 case YUV420_DMA_Y_EVEN:
263 ctx->xt->numf = s_height / 2;
264 ctx->xt->sgl[0].size = s_width;
265 ctx->xt->sgl[0].icg = s_width;
266 ctx->xt->src_start = p_in + s_size / 2;
267 ctx->xt->dst_start = p_out + s_width;
268 break;
269 case YUV420_DMA_U_ODD:
270 ctx->xt->numf = s_height / 4;
271 ctx->xt->sgl[0].size = s_width / 2;
272 ctx->xt->sgl[0].icg = s_width / 2;
273 ctx->xt->src_start = p_in + s_size;
274 ctx->xt->dst_start = p_out + s_size;
275 break;
276 case YUV420_DMA_U_EVEN:
277 ctx->xt->numf = s_height / 4;
278 ctx->xt->sgl[0].size = s_width / 2;
279 ctx->xt->sgl[0].icg = s_width / 2;
280 ctx->xt->src_start = p_in + (9 * s_size) / 8;
281 ctx->xt->dst_start = p_out + s_size + s_width / 2;
282 break;
283 case YUV420_DMA_V_ODD:
284 ctx->xt->numf = s_height / 4;
285 ctx->xt->sgl[0].size = s_width / 2;
286 ctx->xt->sgl[0].icg = s_width / 2;
287 ctx->xt->src_start = p_in + (5 * s_size) / 4;
288 ctx->xt->dst_start = p_out + (5 * s_size) / 4;
289 break;
290 case YUV420_DMA_V_EVEN:
291 ctx->xt->numf = s_height / 4;
292 ctx->xt->sgl[0].size = s_width / 2;
293 ctx->xt->sgl[0].icg = s_width / 2;
294 ctx->xt->src_start = p_in + (11 * s_size) / 8;
295 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2;
296 break;
297 case YUV420_DMA_Y_ODD_DOUBLING:
298 ctx->xt->numf = s_height / 2;
299 ctx->xt->sgl[0].size = s_width;
300 ctx->xt->sgl[0].icg = s_width;
301 ctx->xt->src_start = p_in;
302 ctx->xt->dst_start = p_out + s_width;
303 break;
304 case YUV420_DMA_U_ODD_DOUBLING:
305 ctx->xt->numf = s_height / 4;
306 ctx->xt->sgl[0].size = s_width / 2;
307 ctx->xt->sgl[0].icg = s_width / 2;
308 ctx->xt->src_start = p_in + s_size;
309 ctx->xt->dst_start = p_out + s_size + s_width / 2;
310 break;
311 case YUV420_DMA_V_ODD_DOUBLING:
312 ctx->xt->numf = s_height / 4;
313 ctx->xt->sgl[0].size = s_width / 2;
314 ctx->xt->sgl[0].icg = s_width / 2;
315 ctx->xt->src_start = p_in + (5 * s_size) / 4;
316 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2;
317 break;
318 case YUYV_DMA_ODD:
319 ctx->xt->numf = s_height / 2;
320 ctx->xt->sgl[0].size = s_width * 2;
321 ctx->xt->sgl[0].icg = s_width * 2;
322 ctx->xt->src_start = p_in;
323 ctx->xt->dst_start = p_out;
324 break;
325 case YUYV_DMA_EVEN:
326 ctx->xt->numf = s_height / 2;
327 ctx->xt->sgl[0].size = s_width * 2;
328 ctx->xt->sgl[0].icg = s_width * 2;
329 ctx->xt->src_start = p_in + s_size;
330 ctx->xt->dst_start = p_out + s_width * 2;
331 break;
332 case YUYV_DMA_EVEN_DOUBLING:
333 default:
334 ctx->xt->numf = s_height / 2;
335 ctx->xt->sgl[0].size = s_width * 2;
336 ctx->xt->sgl[0].icg = s_width * 2;
337 ctx->xt->src_start = p_in;
338 ctx->xt->dst_start = p_out + s_width * 2;
339 break;
340 }
341
342 /* Common parameters for al transfers */
343 ctx->xt->frame_size = 1;
344 ctx->xt->dir = DMA_MEM_TO_MEM;
345 ctx->xt->src_sgl = false;
346 ctx->xt->dst_sgl = true;
347 flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT |
348 DMA_COMPL_SKIP_DEST_UNMAP | DMA_COMPL_SKIP_SRC_UNMAP;
349
350 tx = dmadev->device_prep_interleaved_dma(chan, ctx->xt, flags);
351 if (tx == NULL) {
352 v4l2_warn(&pcdev->v4l2_dev, "DMA interleaved prep error\n");
353 return;
354 }
355
356 if (do_callback) {
357 tx->callback = dma_callback;
358 tx->callback_param = ctx;
359 }
360
361 ctx->cookie = dmaengine_submit(tx);
362 if (dma_submit_error(ctx->cookie)) {
363 v4l2_warn(&pcdev->v4l2_dev,
364 "DMA submit error %d with src=0x%x dst=0x%x len=0x%x\n",
365 ctx->cookie, p_in, p_out, s_size * 3/2);
366 return;
367 }
368
369 dma_async_issue_pending(chan);
370}
371
372static void deinterlace_device_run(void *priv)
373{
374 struct deinterlace_ctx *ctx = priv;
375 struct deinterlace_q_data *dst_q_data;
376
377 atomic_set(&ctx->dev->busy, 1);
378
379 dprintk(ctx->dev, "%s: DMA try issue.\n", __func__);
380
381 dst_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
382
383 /*
384 * 4 possible field conversions are possible at the moment:
385 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_INTERLACED_TB:
386 * two separate fields in the same input buffer are interlaced
387 * in the output buffer using weaving. Top field comes first.
388 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_NONE:
389 * top field from the input buffer is copied to the output buffer
390 * using line doubling. Bottom field from the input buffer is discarded.
391 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_INTERLACED_BT:
392 * two separate fields in the same input buffer are interlaced
393 * in the output buffer using weaving. Bottom field comes first.
394 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_NONE:
395 * bottom field from the input buffer is copied to the output buffer
396 * using line doubling. Top field from the input buffer is discarded.
397 */
398 switch (dst_q_data->fmt->fourcc) {
399 case V4L2_PIX_FMT_YUV420:
400 switch (dst_q_data->field) {
401 case V4L2_FIELD_INTERLACED_TB:
402 case V4L2_FIELD_INTERLACED_BT:
403 dprintk(ctx->dev, "%s: yuv420 interlaced tb.\n",
404 __func__);
405 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);
406 deinterlace_issue_dma(ctx, YUV420_DMA_Y_EVEN, 0);
407 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);
408 deinterlace_issue_dma(ctx, YUV420_DMA_U_EVEN, 0);
409 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);
410 deinterlace_issue_dma(ctx, YUV420_DMA_V_EVEN, 1);
411 break;
412 case V4L2_FIELD_NONE:
413 default:
414 dprintk(ctx->dev, "%s: yuv420 interlaced line doubling.\n",
415 __func__);
416 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);
417 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD_DOUBLING, 0);
418 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);
419 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD_DOUBLING, 0);
420 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);
421 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD_DOUBLING, 1);
422 break;
423 }
424 break;
425 case V4L2_PIX_FMT_YUYV:
426 default:
427 switch (dst_q_data->field) {
428 case V4L2_FIELD_INTERLACED_TB:
429 case V4L2_FIELD_INTERLACED_BT:
430 dprintk(ctx->dev, "%s: yuyv interlaced_tb.\n",
431 __func__);
432 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);
433 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN, 1);
434 break;
435 case V4L2_FIELD_NONE:
436 default:
437 dprintk(ctx->dev, "%s: yuyv interlaced line doubling.\n",
438 __func__);
439 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);
440 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN_DOUBLING, 1);
441 break;
442 }
443 break;
444 }
445
446 dprintk(ctx->dev, "%s: DMA issue done.\n", __func__);
447}
448
449/*
450 * video ioctls
451 */
452static int vidioc_querycap(struct file *file, void *priv,
453 struct v4l2_capability *cap)
454{
455 strlcpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver));
456 strlcpy(cap->card, MEM2MEM_NAME, sizeof(cap->card));
457 strlcpy(cap->bus_info, MEM2MEM_NAME, sizeof(cap->card));
458 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT
459 | V4L2_CAP_STREAMING;
460 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
461
462 return 0;
463}
464
465static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
466{
467 int i, num;
468 struct deinterlace_fmt *fmt;
469
470 num = 0;
471
472 for (i = 0; i < NUM_FORMATS; ++i) {
473 if (formats[i].types & type) {
474 /* index-th format of type type found ? */
475 if (num == f->index)
476 break;
477 /* Correct type but haven't reached our index yet,
478 * just increment per-type index */
479 ++num;
480 }
481 }
482
483 if (i < NUM_FORMATS) {
484 /* Format found */
485 fmt = &formats[i];
486 strlcpy(f->description, fmt->name, sizeof(f->description));
487 f->pixelformat = fmt->fourcc;
488 return 0;
489 }
490
491 /* Format not found */
492 return -EINVAL;
493}
494
495static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
496 struct v4l2_fmtdesc *f)
497{
498 return enum_fmt(f, MEM2MEM_CAPTURE);
499}
500
501static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
502 struct v4l2_fmtdesc *f)
503{
504 return enum_fmt(f, MEM2MEM_OUTPUT);
505}
506
507static int vidioc_g_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
508{
509 struct vb2_queue *vq;
510 struct deinterlace_q_data *q_data;
511
512 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
513 if (!vq)
514 return -EINVAL;
515
516 q_data = get_q_data(f->type);
517
518 f->fmt.pix.width = q_data->width;
519 f->fmt.pix.height = q_data->height;
520 f->fmt.pix.field = q_data->field;
521 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
522
523 switch (q_data->fmt->fourcc) {
524 case V4L2_PIX_FMT_YUV420:
525 f->fmt.pix.bytesperline = q_data->width * 3 / 2;
526 break;
527 case V4L2_PIX_FMT_YUYV:
528 default:
529 f->fmt.pix.bytesperline = q_data->width * 2;
530 }
531
532 f->fmt.pix.sizeimage = q_data->sizeimage;
533 f->fmt.pix.colorspace = ctx->colorspace;
534
535 return 0;
536}
537
538static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
539 struct v4l2_format *f)
540{
541 return vidioc_g_fmt(priv, f);
542}
543
544static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
545 struct v4l2_format *f)
546{
547 return vidioc_g_fmt(priv, f);
548}
549
550static int vidioc_try_fmt(struct v4l2_format *f, struct deinterlace_fmt *fmt)
551{
552 switch (f->fmt.pix.pixelformat) {
553 case V4L2_PIX_FMT_YUV420:
554 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
555 break;
556 case V4L2_PIX_FMT_YUYV:
557 default:
558 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
559 }
560 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
561
562 return 0;
563}
564
565static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
566 struct v4l2_format *f)
567{
568 struct deinterlace_fmt *fmt;
569 struct deinterlace_ctx *ctx = priv;
570
571 fmt = find_format(f);
572 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE))
573 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
574
575 f->fmt.pix.colorspace = ctx->colorspace;
576
577 if (f->fmt.pix.field != V4L2_FIELD_INTERLACED_TB &&
578 f->fmt.pix.field != V4L2_FIELD_INTERLACED_BT &&
579 f->fmt.pix.field != V4L2_FIELD_NONE)
580 f->fmt.pix.field = V4L2_FIELD_INTERLACED_TB;
581
582 return vidioc_try_fmt(f, fmt);
583}
584
585static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
586 struct v4l2_format *f)
587{
588 struct deinterlace_fmt *fmt;
589
590 fmt = find_format(f);
591 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT))
592 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
593
594 if (!f->fmt.pix.colorspace)
595 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
596
597 if (f->fmt.pix.field != V4L2_FIELD_SEQ_TB &&
598 f->fmt.pix.field != V4L2_FIELD_SEQ_BT)
599 f->fmt.pix.field = V4L2_FIELD_SEQ_TB;
600
601 return vidioc_try_fmt(f, fmt);
602}
603
604static int vidioc_s_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
605{
606 struct deinterlace_q_data *q_data;
607 struct vb2_queue *vq;
608
609 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
610 if (!vq)
611 return -EINVAL;
612
613 q_data = get_q_data(f->type);
614 if (!q_data)
615 return -EINVAL;
616
617 if (vb2_is_busy(vq)) {
618 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
619 return -EBUSY;
620 }
621
622 q_data->fmt = find_format(f);
623 if (!q_data->fmt) {
624 v4l2_err(&ctx->dev->v4l2_dev,
625 "Couldn't set format type %d, wxh: %dx%d. fmt: %d, field: %d\n",
626 f->type, f->fmt.pix.width, f->fmt.pix.height,
627 f->fmt.pix.pixelformat, f->fmt.pix.field);
628 return -EINVAL;
629 }
630
631 q_data->width = f->fmt.pix.width;
632 q_data->height = f->fmt.pix.height;
633 q_data->field = f->fmt.pix.field;
634
635 switch (f->fmt.pix.pixelformat) {
636 case V4L2_PIX_FMT_YUV420:
637 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
638 q_data->sizeimage = (q_data->width * q_data->height * 3) / 2;
639 break;
640 case V4L2_PIX_FMT_YUYV:
641 default:
642 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
643 q_data->sizeimage = q_data->width * q_data->height * 2;
644 }
645
646 dprintk(ctx->dev,
647 "Setting format for type %d, wxh: %dx%d, fmt: %d, field: %d\n",
648 f->type, q_data->width, q_data->height, q_data->fmt->fourcc,
649 q_data->field);
650
651 return 0;
652}
653
654static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
655 struct v4l2_format *f)
656{
657 int ret;
658
659 ret = vidioc_try_fmt_vid_cap(file, priv, f);
660 if (ret)
661 return ret;
662 return vidioc_s_fmt(priv, f);
663}
664
665static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
666 struct v4l2_format *f)
667{
668 struct deinterlace_ctx *ctx = priv;
669 int ret;
670
671 ret = vidioc_try_fmt_vid_out(file, priv, f);
672 if (ret)
673 return ret;
674
675 ret = vidioc_s_fmt(priv, f);
676 if (!ret)
677 ctx->colorspace = f->fmt.pix.colorspace;
678
679 return ret;
680}
681
682static int vidioc_reqbufs(struct file *file, void *priv,
683 struct v4l2_requestbuffers *reqbufs)
684{
685 struct deinterlace_ctx *ctx = priv;
686
687 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
688}
689
690static int vidioc_querybuf(struct file *file, void *priv,
691 struct v4l2_buffer *buf)
692{
693 struct deinterlace_ctx *ctx = priv;
694
695 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
696}
697
698static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
699{
700 struct deinterlace_ctx *ctx = priv;
701
702 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
703}
704
705static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
706{
707 struct deinterlace_ctx *ctx = priv;
708
709 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
710}
711
712static int vidioc_streamon(struct file *file, void *priv,
713 enum v4l2_buf_type type)
714{
715 struct deinterlace_q_data *s_q_data, *d_q_data;
716 struct deinterlace_ctx *ctx = priv;
717
718 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
719 d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
720
721 /* Check that src and dst queues have the same pix format */
722 if (s_q_data->fmt->fourcc != d_q_data->fmt->fourcc) {
723 v4l2_err(&ctx->dev->v4l2_dev,
724 "src and dst formats don't match.\n");
725 return -EINVAL;
726 }
727
728 /* Check that input and output deinterlacing types are compatible */
729 switch (s_q_data->field) {
730 case V4L2_FIELD_SEQ_BT:
731 if (d_q_data->field != V4L2_FIELD_NONE &&
732 d_q_data->field != V4L2_FIELD_INTERLACED_BT) {
733 v4l2_err(&ctx->dev->v4l2_dev,
734 "src and dst field conversion [(%d)->(%d)] not supported.\n",
735 s_q_data->field, d_q_data->field);
736 return -EINVAL;
737 }
738 break;
739 case V4L2_FIELD_SEQ_TB:
740 if (d_q_data->field != V4L2_FIELD_NONE &&
741 d_q_data->field != V4L2_FIELD_INTERLACED_TB) {
742 v4l2_err(&ctx->dev->v4l2_dev,
743 "src and dst field conversion [(%d)->(%d)] not supported.\n",
744 s_q_data->field, d_q_data->field);
745 return -EINVAL;
746 }
747 break;
748 default:
749 return -EINVAL;
750 }
751
752 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
753}
754
755static int vidioc_streamoff(struct file *file, void *priv,
756 enum v4l2_buf_type type)
757{
758 struct deinterlace_ctx *ctx = priv;
759
760 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
761}
762
763static const struct v4l2_ioctl_ops deinterlace_ioctl_ops = {
764 .vidioc_querycap = vidioc_querycap,
765
766 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
767 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
768 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
769 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
770
771 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
772 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
773 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
774 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
775
776 .vidioc_reqbufs = vidioc_reqbufs,
777 .vidioc_querybuf = vidioc_querybuf,
778
779 .vidioc_qbuf = vidioc_qbuf,
780 .vidioc_dqbuf = vidioc_dqbuf,
781
782 .vidioc_streamon = vidioc_streamon,
783 .vidioc_streamoff = vidioc_streamoff,
784};
785
786
787/*
788 * Queue operations
789 */
790struct vb2_dc_conf {
791 struct device *dev;
792};
793
794static int deinterlace_queue_setup(struct vb2_queue *vq,
795 const struct v4l2_format *fmt,
796 unsigned int *nbuffers, unsigned int *nplanes,
797 unsigned int sizes[], void *alloc_ctxs[])
798{
799 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vq);
800 struct deinterlace_q_data *q_data;
801 unsigned int size, count = *nbuffers;
802
803 q_data = get_q_data(vq->type);
804
805 switch (q_data->fmt->fourcc) {
806 case V4L2_PIX_FMT_YUV420:
807 size = q_data->width * q_data->height * 3 / 2;
808 break;
809 case V4L2_PIX_FMT_YUYV:
810 default:
811 size = q_data->width * q_data->height * 2;
812 }
813
814 *nplanes = 1;
815 *nbuffers = count;
816 sizes[0] = size;
817
818 alloc_ctxs[0] = ctx->dev->alloc_ctx;
819
820 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
821
822 return 0;
823}
824
825static int deinterlace_buf_prepare(struct vb2_buffer *vb)
826{
827 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
828 struct deinterlace_q_data *q_data;
829
830 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
831
832 q_data = get_q_data(vb->vb2_queue->type);
833
834 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
835 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n",
836 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage);
837 return -EINVAL;
838 }
839
840 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
841
842 return 0;
843}
844
845static void deinterlace_buf_queue(struct vb2_buffer *vb)
846{
847 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
848 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
849}
850
851static struct vb2_ops deinterlace_qops = {
852 .queue_setup = deinterlace_queue_setup,
853 .buf_prepare = deinterlace_buf_prepare,
854 .buf_queue = deinterlace_buf_queue,
855};
856
857static int queue_init(void *priv, struct vb2_queue *src_vq,
858 struct vb2_queue *dst_vq)
859{
860 struct deinterlace_ctx *ctx = priv;
861 int ret;
862
863 memset(src_vq, 0, sizeof(*src_vq));
864 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
865 src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
866 src_vq->drv_priv = ctx;
867 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
868 src_vq->ops = &deinterlace_qops;
869 src_vq->mem_ops = &vb2_dma_contig_memops;
870 q_data[V4L2_M2M_SRC].fmt = &formats[0];
871 q_data[V4L2_M2M_SRC].width = 640;
872 q_data[V4L2_M2M_SRC].height = 480;
873 q_data[V4L2_M2M_SRC].sizeimage = (640 * 480 * 3) / 2;
874 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_SEQ_TB;
875
876 ret = vb2_queue_init(src_vq);
877 if (ret)
878 return ret;
879
880 memset(dst_vq, 0, sizeof(*dst_vq));
881 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
882 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
883 dst_vq->drv_priv = ctx;
884 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
885 dst_vq->ops = &deinterlace_qops;
886 dst_vq->mem_ops = &vb2_dma_contig_memops;
887 q_data[V4L2_M2M_DST].fmt = &formats[0];
888 q_data[V4L2_M2M_DST].width = 640;
889 q_data[V4L2_M2M_DST].height = 480;
890 q_data[V4L2_M2M_DST].sizeimage = (640 * 480 * 3) / 2;
891 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_INTERLACED_TB;
892
893 return vb2_queue_init(dst_vq);
894}
895
896/*
897 * File operations
898 */
899static int deinterlace_open(struct file *file)
900{
901 struct deinterlace_dev *pcdev = video_drvdata(file);
902 struct deinterlace_ctx *ctx = NULL;
903
904 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
905 if (!ctx)
906 return -ENOMEM;
907
908 file->private_data = ctx;
909 ctx->dev = pcdev;
910
911 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
912 if (IS_ERR(ctx->m2m_ctx)) {
913 int ret = PTR_ERR(ctx->m2m_ctx);
914
915 kfree(ctx);
916 return ret;
917 }
918
919 ctx->xt = kzalloc(sizeof(struct dma_async_tx_descriptor) +
920 sizeof(struct data_chunk), GFP_KERNEL);
921 if (!ctx->xt) {
922 int ret = PTR_ERR(ctx->xt);
923
924 kfree(ctx);
925 return ret;
926 }
927
928 ctx->colorspace = V4L2_COLORSPACE_REC709;
929
930 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
931
932 return 0;
933}
934
935static int deinterlace_release(struct file *file)
936{
937 struct deinterlace_dev *pcdev = video_drvdata(file);
938 struct deinterlace_ctx *ctx = file->private_data;
939
940 dprintk(pcdev, "Releasing instance %p\n", ctx);
941
942 v4l2_m2m_ctx_release(ctx->m2m_ctx);
943 kfree(ctx->xt);
944 kfree(ctx);
945
946 return 0;
947}
948
949static unsigned int deinterlace_poll(struct file *file,
950 struct poll_table_struct *wait)
951{
952 struct deinterlace_ctx *ctx = file->private_data;
953 int ret;
954
955 deinterlace_lock(ctx);
956 ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
957 deinterlace_unlock(ctx);
958
959 return ret;
960}
961
962static int deinterlace_mmap(struct file *file, struct vm_area_struct *vma)
963{
964 struct deinterlace_ctx *ctx = file->private_data;
965
966 return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
967}
968
969static const struct v4l2_file_operations deinterlace_fops = {
970 .owner = THIS_MODULE,
971 .open = deinterlace_open,
972 .release = deinterlace_release,
973 .poll = deinterlace_poll,
974 .unlocked_ioctl = video_ioctl2,
975 .mmap = deinterlace_mmap,
976};
977
978static struct video_device deinterlace_videodev = {
979 .name = MEM2MEM_NAME,
980 .fops = &deinterlace_fops,
981 .ioctl_ops = &deinterlace_ioctl_ops,
982 .minor = -1,
983 .release = video_device_release,
984};
985
986static struct v4l2_m2m_ops m2m_ops = {
987 .device_run = deinterlace_device_run,
988 .job_ready = deinterlace_job_ready,
989 .job_abort = deinterlace_job_abort,
990 .lock = deinterlace_lock,
991 .unlock = deinterlace_unlock,
992};
993
994static int deinterlace_probe(struct platform_device *pdev)
995{
996 struct deinterlace_dev *pcdev;
997 struct video_device *vfd;
998 dma_cap_mask_t mask;
999 int ret = 0;
1000
1001 pcdev = kzalloc(sizeof *pcdev, GFP_KERNEL);
1002 if (!pcdev)
1003 return -ENOMEM;
1004
1005 spin_lock_init(&pcdev->irqlock);
1006
1007 dma_cap_zero(mask);
1008 dma_cap_set(DMA_INTERLEAVE, mask);
1009 pcdev->dma_chan = dma_request_channel(mask, NULL, pcdev);
1010 if (!pcdev->dma_chan)
1011 goto free_dev;
1012
1013 if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) {
1014 v4l2_err(&pcdev->v4l2_dev, "DMA does not support INTERLEAVE\n");
1015 goto rel_dma;
1016 }
1017
1018 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
1019 if (ret)
1020 goto rel_dma;
1021
1022 atomic_set(&pcdev->busy, 0);
1023 mutex_init(&pcdev->dev_mutex);
1024
1025 vfd = video_device_alloc();
1026 if (!vfd) {
1027 v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
1028 ret = -ENOMEM;
1029 goto unreg_dev;
1030 }
1031
1032 *vfd = deinterlace_videodev;
1033 vfd->lock = &pcdev->dev_mutex;
1034
1035 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
1036 if (ret) {
1037 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
1038 goto rel_vdev;
1039 }
1040
1041 video_set_drvdata(vfd, pcdev);
1042 snprintf(vfd->name, sizeof(vfd->name), "%s", deinterlace_videodev.name);
1043 pcdev->vfd = vfd;
1044 v4l2_info(&pcdev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME
1045 " Device registered as /dev/video%d\n", vfd->num);
1046
1047 platform_set_drvdata(pdev, pcdev);
1048
1049 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1050 if (IS_ERR(pcdev->alloc_ctx)) {
1051 v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n");
1052 ret = PTR_ERR(pcdev->alloc_ctx);
1053 goto err_ctx;
1054 }
1055
1056 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
1057 if (IS_ERR(pcdev->m2m_dev)) {
1058 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
1059 ret = PTR_ERR(pcdev->m2m_dev);
1060 goto err_m2m;
1061 }
1062
1063 return 0;
1064
1065 v4l2_m2m_release(pcdev->m2m_dev);
1066err_m2m:
1067 video_unregister_device(pcdev->vfd);
1068err_ctx:
1069 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1070rel_vdev:
1071 video_device_release(vfd);
1072unreg_dev:
1073 v4l2_device_unregister(&pcdev->v4l2_dev);
1074rel_dma:
1075 dma_release_channel(pcdev->dma_chan);
1076free_dev:
1077 kfree(pcdev);
1078
1079 return ret;
1080}
1081
1082static int deinterlace_remove(struct platform_device *pdev)
1083{
1084 struct deinterlace_dev *pcdev =
1085 (struct deinterlace_dev *)platform_get_drvdata(pdev);
1086
1087 v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME);
1088 v4l2_m2m_release(pcdev->m2m_dev);
1089 video_unregister_device(pcdev->vfd);
1090 v4l2_device_unregister(&pcdev->v4l2_dev);
1091 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1092 dma_release_channel(pcdev->dma_chan);
1093 kfree(pcdev);
1094
1095 return 0;
1096}
1097
1098static struct platform_driver deinterlace_pdrv = {
1099 .probe = deinterlace_probe,
1100 .remove = deinterlace_remove,
1101 .driver = {
1102 .name = MEM2MEM_NAME,
1103 .owner = THIS_MODULE,
1104 },
1105};
1106
1107static void __exit deinterlace_exit(void)
1108{
1109 platform_driver_unregister(&deinterlace_pdrv);
1110}
1111
1112static int __init deinterlace_init(void)
1113{
1114 return platform_driver_register(&deinterlace_pdrv);
1115}
1116
1117module_init(deinterlace_init);
1118module_exit(deinterlace_exit);
1119
Linux kernel - Deliverables
This page took 0.086583 seconds and 5 git commands to generate.