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[deliverable/linux.git] / drivers / media / platform / m2m-deinterlace.c
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
26 MODULE_DESCRIPTION("mem2mem device which supports deinterlacing using dmaengine");
27 MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com");
28 MODULE_LICENSE("GPL");
29 MODULE_VERSION("0.0.1");
30
31 static bool debug;
32 module_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
43 struct deinterlace_fmt {
44 char *name;
45 u32 fourcc;
46 /* Types the format can be used for */
47 u32 types;
48 };
49
50 static 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 */
66 struct 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
74 enum {
75 V4L2_M2M_SRC = 0,
76 V4L2_M2M_DST = 1,
77 };
78
79 enum {
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 */
95 static struct deinterlace_q_data q_data[2];
96
97 static 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
110 static 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
128 struct 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 };
140
141 struct deinterlace_ctx {
142 struct deinterlace_dev *dev;
143
144 /* Abort requested by m2m */
145 int aborting;
146 enum v4l2_colorspace colorspace;
147 dma_cookie_t cookie;
148 struct v4l2_m2m_ctx *m2m_ctx;
149 struct dma_interleaved_template *xt;
150 };
151
152 /*
153 * mem2mem callbacks
154 */
155 static int deinterlace_job_ready(void *priv)
156 {
157 struct deinterlace_ctx *ctx = priv;
158 struct deinterlace_dev *pcdev = ctx->dev;
159
160 if ((v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) > 0)
161 && (v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) > 0)
162 && (atomic_read(&ctx->dev->busy) == 0)) {
163 dprintk(pcdev, "Task ready\n");
164 return 1;
165 }
166
167 dprintk(pcdev, "Task not ready to run\n");
168
169 return 0;
170 }
171
172 static void deinterlace_job_abort(void *priv)
173 {
174 struct deinterlace_ctx *ctx = priv;
175 struct deinterlace_dev *pcdev = ctx->dev;
176
177 ctx->aborting = 1;
178
179 dprintk(pcdev, "Aborting task\n");
180
181 v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx);
182 }
183
184 static void deinterlace_lock(void *priv)
185 {
186 struct deinterlace_ctx *ctx = priv;
187 struct deinterlace_dev *pcdev = ctx->dev;
188 mutex_lock(&pcdev->dev_mutex);
189 }
190
191 static void deinterlace_unlock(void *priv)
192 {
193 struct deinterlace_ctx *ctx = priv;
194 struct deinterlace_dev *pcdev = ctx->dev;
195 mutex_unlock(&pcdev->dev_mutex);
196 }
197
198 static void dma_callback(void *data)
199 {
200 struct deinterlace_ctx *curr_ctx = data;
201 struct deinterlace_dev *pcdev = curr_ctx->dev;
202 struct vb2_v4l2_buffer *src_vb, *dst_vb;
203
204 atomic_set(&pcdev->busy, 0);
205
206 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
207 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
208
209 dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
210 dst_vb->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
211 dst_vb->flags |=
212 src_vb->flags & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
213 dst_vb->timecode = src_vb->timecode;
214
215 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
216 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
217
218 v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
219
220 dprintk(pcdev, "dma transfers completed.\n");
221 }
222
223 static void deinterlace_issue_dma(struct deinterlace_ctx *ctx, int op,
224 int do_callback)
225 {
226 struct deinterlace_q_data *s_q_data;
227 struct vb2_v4l2_buffer *src_buf, *dst_buf;
228 struct deinterlace_dev *pcdev = ctx->dev;
229 struct dma_chan *chan = pcdev->dma_chan;
230 struct dma_device *dmadev = chan->device;
231 struct dma_async_tx_descriptor *tx;
232 unsigned int s_width, s_height;
233 unsigned int s_size;
234 dma_addr_t p_in, p_out;
235 enum dma_ctrl_flags flags;
236
237 src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
238 dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
239
240 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
241 s_width = s_q_data->width;
242 s_height = s_q_data->height;
243 s_size = s_width * s_height;
244
245 p_in = (dma_addr_t)vb2_dma_contig_plane_dma_addr(&src_buf->vb2_buf, 0);
246 p_out = (dma_addr_t)vb2_dma_contig_plane_dma_addr(&dst_buf->vb2_buf,
247 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
349 tx = dmadev->device_prep_interleaved_dma(chan, ctx->xt, flags);
350 if (tx == NULL) {
351 v4l2_warn(&pcdev->v4l2_dev, "DMA interleaved prep error\n");
352 return;
353 }
354
355 if (do_callback) {
356 tx->callback = dma_callback;
357 tx->callback_param = ctx;
358 }
359
360 ctx->cookie = dmaengine_submit(tx);
361 if (dma_submit_error(ctx->cookie)) {
362 v4l2_warn(&pcdev->v4l2_dev,
363 "DMA submit error %d with src=0x%x dst=0x%x len=0x%x\n",
364 ctx->cookie, (unsigned)p_in, (unsigned)p_out,
365 s_size * 3/2);
366 return;
367 }
368
369 dma_async_issue_pending(chan);
370 }
371
372 static 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 */
452 static 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 /*
459 * This is only a mem-to-mem video device. The capture and output
460 * device capability flags are left only for backward compatibility
461 * and are scheduled for removal.
462 */
463 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT |
464 V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
465 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
466
467 return 0;
468 }
469
470 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
471 {
472 int i, num;
473 struct deinterlace_fmt *fmt;
474
475 num = 0;
476
477 for (i = 0; i < NUM_FORMATS; ++i) {
478 if (formats[i].types & type) {
479 /* index-th format of type type found ? */
480 if (num == f->index)
481 break;
482 /* Correct type but haven't reached our index yet,
483 * just increment per-type index */
484 ++num;
485 }
486 }
487
488 if (i < NUM_FORMATS) {
489 /* Format found */
490 fmt = &formats[i];
491 strlcpy(f->description, fmt->name, sizeof(f->description));
492 f->pixelformat = fmt->fourcc;
493 return 0;
494 }
495
496 /* Format not found */
497 return -EINVAL;
498 }
499
500 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
501 struct v4l2_fmtdesc *f)
502 {
503 return enum_fmt(f, MEM2MEM_CAPTURE);
504 }
505
506 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
507 struct v4l2_fmtdesc *f)
508 {
509 return enum_fmt(f, MEM2MEM_OUTPUT);
510 }
511
512 static int vidioc_g_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
513 {
514 struct vb2_queue *vq;
515 struct deinterlace_q_data *q_data;
516
517 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
518 if (!vq)
519 return -EINVAL;
520
521 q_data = get_q_data(f->type);
522
523 f->fmt.pix.width = q_data->width;
524 f->fmt.pix.height = q_data->height;
525 f->fmt.pix.field = q_data->field;
526 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
527
528 switch (q_data->fmt->fourcc) {
529 case V4L2_PIX_FMT_YUV420:
530 f->fmt.pix.bytesperline = q_data->width * 3 / 2;
531 break;
532 case V4L2_PIX_FMT_YUYV:
533 default:
534 f->fmt.pix.bytesperline = q_data->width * 2;
535 }
536
537 f->fmt.pix.sizeimage = q_data->sizeimage;
538 f->fmt.pix.colorspace = ctx->colorspace;
539
540 return 0;
541 }
542
543 static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
544 struct v4l2_format *f)
545 {
546 return vidioc_g_fmt(priv, f);
547 }
548
549 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
550 struct v4l2_format *f)
551 {
552 return vidioc_g_fmt(priv, f);
553 }
554
555 static int vidioc_try_fmt(struct v4l2_format *f, struct deinterlace_fmt *fmt)
556 {
557 switch (f->fmt.pix.pixelformat) {
558 case V4L2_PIX_FMT_YUV420:
559 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
560 break;
561 case V4L2_PIX_FMT_YUYV:
562 default:
563 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
564 }
565 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
566
567 return 0;
568 }
569
570 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
571 struct v4l2_format *f)
572 {
573 struct deinterlace_fmt *fmt;
574 struct deinterlace_ctx *ctx = priv;
575
576 fmt = find_format(f);
577 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE))
578 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
579
580 f->fmt.pix.colorspace = ctx->colorspace;
581
582 if (f->fmt.pix.field != V4L2_FIELD_INTERLACED_TB &&
583 f->fmt.pix.field != V4L2_FIELD_INTERLACED_BT &&
584 f->fmt.pix.field != V4L2_FIELD_NONE)
585 f->fmt.pix.field = V4L2_FIELD_INTERLACED_TB;
586
587 return vidioc_try_fmt(f, fmt);
588 }
589
590 static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
591 struct v4l2_format *f)
592 {
593 struct deinterlace_fmt *fmt;
594
595 fmt = find_format(f);
596 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT))
597 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
598
599 if (!f->fmt.pix.colorspace)
600 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
601
602 if (f->fmt.pix.field != V4L2_FIELD_SEQ_TB &&
603 f->fmt.pix.field != V4L2_FIELD_SEQ_BT)
604 f->fmt.pix.field = V4L2_FIELD_SEQ_TB;
605
606 return vidioc_try_fmt(f, fmt);
607 }
608
609 static int vidioc_s_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
610 {
611 struct deinterlace_q_data *q_data;
612 struct vb2_queue *vq;
613
614 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
615 if (!vq)
616 return -EINVAL;
617
618 q_data = get_q_data(f->type);
619 if (!q_data)
620 return -EINVAL;
621
622 if (vb2_is_busy(vq)) {
623 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
624 return -EBUSY;
625 }
626
627 q_data->fmt = find_format(f);
628 if (!q_data->fmt) {
629 v4l2_err(&ctx->dev->v4l2_dev,
630 "Couldn't set format type %d, wxh: %dx%d. fmt: %d, field: %d\n",
631 f->type, f->fmt.pix.width, f->fmt.pix.height,
632 f->fmt.pix.pixelformat, f->fmt.pix.field);
633 return -EINVAL;
634 }
635
636 q_data->width = f->fmt.pix.width;
637 q_data->height = f->fmt.pix.height;
638 q_data->field = f->fmt.pix.field;
639
640 switch (f->fmt.pix.pixelformat) {
641 case V4L2_PIX_FMT_YUV420:
642 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
643 q_data->sizeimage = (q_data->width * q_data->height * 3) / 2;
644 break;
645 case V4L2_PIX_FMT_YUYV:
646 default:
647 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
648 q_data->sizeimage = q_data->width * q_data->height * 2;
649 }
650
651 dprintk(ctx->dev,
652 "Setting format for type %d, wxh: %dx%d, fmt: %d, field: %d\n",
653 f->type, q_data->width, q_data->height, q_data->fmt->fourcc,
654 q_data->field);
655
656 return 0;
657 }
658
659 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
660 struct v4l2_format *f)
661 {
662 int ret;
663
664 ret = vidioc_try_fmt_vid_cap(file, priv, f);
665 if (ret)
666 return ret;
667 return vidioc_s_fmt(priv, f);
668 }
669
670 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
671 struct v4l2_format *f)
672 {
673 struct deinterlace_ctx *ctx = priv;
674 int ret;
675
676 ret = vidioc_try_fmt_vid_out(file, priv, f);
677 if (ret)
678 return ret;
679
680 ret = vidioc_s_fmt(priv, f);
681 if (!ret)
682 ctx->colorspace = f->fmt.pix.colorspace;
683
684 return ret;
685 }
686
687 static int vidioc_reqbufs(struct file *file, void *priv,
688 struct v4l2_requestbuffers *reqbufs)
689 {
690 struct deinterlace_ctx *ctx = priv;
691
692 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
693 }
694
695 static int vidioc_querybuf(struct file *file, void *priv,
696 struct v4l2_buffer *buf)
697 {
698 struct deinterlace_ctx *ctx = priv;
699
700 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
701 }
702
703 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
704 {
705 struct deinterlace_ctx *ctx = priv;
706
707 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
708 }
709
710 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
711 {
712 struct deinterlace_ctx *ctx = priv;
713
714 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
715 }
716
717 static int vidioc_streamon(struct file *file, void *priv,
718 enum v4l2_buf_type type)
719 {
720 struct deinterlace_q_data *s_q_data, *d_q_data;
721 struct deinterlace_ctx *ctx = priv;
722
723 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
724 d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
725
726 /* Check that src and dst queues have the same pix format */
727 if (s_q_data->fmt->fourcc != d_q_data->fmt->fourcc) {
728 v4l2_err(&ctx->dev->v4l2_dev,
729 "src and dst formats don't match.\n");
730 return -EINVAL;
731 }
732
733 /* Check that input and output deinterlacing types are compatible */
734 switch (s_q_data->field) {
735 case V4L2_FIELD_SEQ_BT:
736 if (d_q_data->field != V4L2_FIELD_NONE &&
737 d_q_data->field != V4L2_FIELD_INTERLACED_BT) {
738 v4l2_err(&ctx->dev->v4l2_dev,
739 "src and dst field conversion [(%d)->(%d)] not supported.\n",
740 s_q_data->field, d_q_data->field);
741 return -EINVAL;
742 }
743 break;
744 case V4L2_FIELD_SEQ_TB:
745 if (d_q_data->field != V4L2_FIELD_NONE &&
746 d_q_data->field != V4L2_FIELD_INTERLACED_TB) {
747 v4l2_err(&ctx->dev->v4l2_dev,
748 "src and dst field conversion [(%d)->(%d)] not supported.\n",
749 s_q_data->field, d_q_data->field);
750 return -EINVAL;
751 }
752 break;
753 default:
754 return -EINVAL;
755 }
756
757 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
758 }
759
760 static int vidioc_streamoff(struct file *file, void *priv,
761 enum v4l2_buf_type type)
762 {
763 struct deinterlace_ctx *ctx = priv;
764
765 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
766 }
767
768 static const struct v4l2_ioctl_ops deinterlace_ioctl_ops = {
769 .vidioc_querycap = vidioc_querycap,
770
771 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
772 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
773 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
774 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
775
776 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
777 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
778 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
779 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
780
781 .vidioc_reqbufs = vidioc_reqbufs,
782 .vidioc_querybuf = vidioc_querybuf,
783
784 .vidioc_qbuf = vidioc_qbuf,
785 .vidioc_dqbuf = vidioc_dqbuf,
786
787 .vidioc_streamon = vidioc_streamon,
788 .vidioc_streamoff = vidioc_streamoff,
789 };
790
791
792 /*
793 * Queue operations
794 */
795 struct vb2_dc_conf {
796 struct device *dev;
797 };
798
799 static int deinterlace_queue_setup(struct vb2_queue *vq,
800 unsigned int *nbuffers, unsigned int *nplanes,
801 unsigned int sizes[], struct device *alloc_devs[])
802 {
803 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vq);
804 struct deinterlace_q_data *q_data;
805 unsigned int size, count = *nbuffers;
806
807 q_data = get_q_data(vq->type);
808
809 switch (q_data->fmt->fourcc) {
810 case V4L2_PIX_FMT_YUV420:
811 size = q_data->width * q_data->height * 3 / 2;
812 break;
813 case V4L2_PIX_FMT_YUYV:
814 default:
815 size = q_data->width * q_data->height * 2;
816 }
817
818 *nplanes = 1;
819 *nbuffers = count;
820 sizes[0] = size;
821
822 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
823
824 return 0;
825 }
826
827 static int deinterlace_buf_prepare(struct vb2_buffer *vb)
828 {
829 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
830 struct deinterlace_q_data *q_data;
831
832 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
833
834 q_data = get_q_data(vb->vb2_queue->type);
835
836 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
837 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n",
838 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage);
839 return -EINVAL;
840 }
841
842 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
843
844 return 0;
845 }
846
847 static void deinterlace_buf_queue(struct vb2_buffer *vb)
848 {
849 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
850 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
851
852 v4l2_m2m_buf_queue(ctx->m2m_ctx, vbuf);
853 }
854
855 static struct vb2_ops deinterlace_qops = {
856 .queue_setup = deinterlace_queue_setup,
857 .buf_prepare = deinterlace_buf_prepare,
858 .buf_queue = deinterlace_buf_queue,
859 };
860
861 static int queue_init(void *priv, struct vb2_queue *src_vq,
862 struct vb2_queue *dst_vq)
863 {
864 struct deinterlace_ctx *ctx = priv;
865 int ret;
866
867 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
868 src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
869 src_vq->drv_priv = ctx;
870 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
871 src_vq->ops = &deinterlace_qops;
872 src_vq->mem_ops = &vb2_dma_contig_memops;
873 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
874 src_vq->dev = ctx->dev->v4l2_dev.dev;
875 q_data[V4L2_M2M_SRC].fmt = &formats[0];
876 q_data[V4L2_M2M_SRC].width = 640;
877 q_data[V4L2_M2M_SRC].height = 480;
878 q_data[V4L2_M2M_SRC].sizeimage = (640 * 480 * 3) / 2;
879 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_SEQ_TB;
880
881 ret = vb2_queue_init(src_vq);
882 if (ret)
883 return ret;
884
885 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
886 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
887 dst_vq->drv_priv = ctx;
888 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
889 dst_vq->ops = &deinterlace_qops;
890 dst_vq->mem_ops = &vb2_dma_contig_memops;
891 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
892 dst_vq->dev = ctx->dev->v4l2_dev.dev;
893 q_data[V4L2_M2M_DST].fmt = &formats[0];
894 q_data[V4L2_M2M_DST].width = 640;
895 q_data[V4L2_M2M_DST].height = 480;
896 q_data[V4L2_M2M_DST].sizeimage = (640 * 480 * 3) / 2;
897 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_INTERLACED_TB;
898
899 return vb2_queue_init(dst_vq);
900 }
901
902 /*
903 * File operations
904 */
905 static int deinterlace_open(struct file *file)
906 {
907 struct deinterlace_dev *pcdev = video_drvdata(file);
908 struct deinterlace_ctx *ctx = NULL;
909
910 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
911 if (!ctx)
912 return -ENOMEM;
913
914 file->private_data = ctx;
915 ctx->dev = pcdev;
916
917 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
918 if (IS_ERR(ctx->m2m_ctx)) {
919 int ret = PTR_ERR(ctx->m2m_ctx);
920
921 kfree(ctx);
922 return ret;
923 }
924
925 ctx->xt = kzalloc(sizeof(struct dma_interleaved_template) +
926 sizeof(struct data_chunk), GFP_KERNEL);
927 if (!ctx->xt) {
928 kfree(ctx);
929 return -ENOMEM;
930 }
931
932 ctx->colorspace = V4L2_COLORSPACE_REC709;
933
934 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
935
936 return 0;
937 }
938
939 static int deinterlace_release(struct file *file)
940 {
941 struct deinterlace_dev *pcdev = video_drvdata(file);
942 struct deinterlace_ctx *ctx = file->private_data;
943
944 dprintk(pcdev, "Releasing instance %p\n", ctx);
945
946 v4l2_m2m_ctx_release(ctx->m2m_ctx);
947 kfree(ctx->xt);
948 kfree(ctx);
949
950 return 0;
951 }
952
953 static unsigned int deinterlace_poll(struct file *file,
954 struct poll_table_struct *wait)
955 {
956 struct deinterlace_ctx *ctx = file->private_data;
957 int ret;
958
959 deinterlace_lock(ctx);
960 ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
961 deinterlace_unlock(ctx);
962
963 return ret;
964 }
965
966 static int deinterlace_mmap(struct file *file, struct vm_area_struct *vma)
967 {
968 struct deinterlace_ctx *ctx = file->private_data;
969
970 return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
971 }
972
973 static const struct v4l2_file_operations deinterlace_fops = {
974 .owner = THIS_MODULE,
975 .open = deinterlace_open,
976 .release = deinterlace_release,
977 .poll = deinterlace_poll,
978 .unlocked_ioctl = video_ioctl2,
979 .mmap = deinterlace_mmap,
980 };
981
982 static struct video_device deinterlace_videodev = {
983 .name = MEM2MEM_NAME,
984 .fops = &deinterlace_fops,
985 .ioctl_ops = &deinterlace_ioctl_ops,
986 .minor = -1,
987 .release = video_device_release_empty,
988 .vfl_dir = VFL_DIR_M2M,
989 };
990
991 static struct v4l2_m2m_ops m2m_ops = {
992 .device_run = deinterlace_device_run,
993 .job_ready = deinterlace_job_ready,
994 .job_abort = deinterlace_job_abort,
995 .lock = deinterlace_lock,
996 .unlock = deinterlace_unlock,
997 };
998
999 static int deinterlace_probe(struct platform_device *pdev)
1000 {
1001 struct deinterlace_dev *pcdev;
1002 struct video_device *vfd;
1003 dma_cap_mask_t mask;
1004 int ret = 0;
1005
1006 pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
1007 if (!pcdev)
1008 return -ENOMEM;
1009
1010 spin_lock_init(&pcdev->irqlock);
1011
1012 dma_cap_zero(mask);
1013 dma_cap_set(DMA_INTERLEAVE, mask);
1014 pcdev->dma_chan = dma_request_channel(mask, NULL, pcdev);
1015 if (!pcdev->dma_chan)
1016 return -ENODEV;
1017
1018 if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) {
1019 dev_err(&pdev->dev, "DMA does not support INTERLEAVE\n");
1020 goto rel_dma;
1021 }
1022
1023 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
1024 if (ret)
1025 goto rel_dma;
1026
1027 atomic_set(&pcdev->busy, 0);
1028 mutex_init(&pcdev->dev_mutex);
1029
1030 vfd = &pcdev->vfd;
1031 *vfd = deinterlace_videodev;
1032 vfd->lock = &pcdev->dev_mutex;
1033 vfd->v4l2_dev = &pcdev->v4l2_dev;
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 unreg_dev;
1039 }
1040
1041 video_set_drvdata(vfd, pcdev);
1042 snprintf(vfd->name, sizeof(vfd->name), "%s", deinterlace_videodev.name);
1043 v4l2_info(&pcdev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME
1044 " Device registered as /dev/video%d\n", vfd->num);
1045
1046 platform_set_drvdata(pdev, pcdev);
1047
1048 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
1049 if (IS_ERR(pcdev->m2m_dev)) {
1050 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
1051 ret = PTR_ERR(pcdev->m2m_dev);
1052 goto err_m2m;
1053 }
1054
1055 return 0;
1056
1057 err_m2m:
1058 video_unregister_device(&pcdev->vfd);
1059 unreg_dev:
1060 v4l2_device_unregister(&pcdev->v4l2_dev);
1061 rel_dma:
1062 dma_release_channel(pcdev->dma_chan);
1063
1064 return ret;
1065 }
1066
1067 static int deinterlace_remove(struct platform_device *pdev)
1068 {
1069 struct deinterlace_dev *pcdev = platform_get_drvdata(pdev);
1070
1071 v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME);
1072 v4l2_m2m_release(pcdev->m2m_dev);
1073 video_unregister_device(&pcdev->vfd);
1074 v4l2_device_unregister(&pcdev->v4l2_dev);
1075 dma_release_channel(pcdev->dma_chan);
1076
1077 return 0;
1078 }
1079
1080 static struct platform_driver deinterlace_pdrv = {
1081 .probe = deinterlace_probe,
1082 .remove = deinterlace_remove,
1083 .driver = {
1084 .name = MEM2MEM_NAME,
1085 },
1086 };
1087 module_platform_driver(deinterlace_pdrv);
1088
Linux kernel - Deliverables
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