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[media] media/bfin: use module_platform_driver macro
[deliverable/linux.git] / drivers / media / platform / m2m-deinterlace.c
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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",
84b3bd46
MCC		 365 ctx->cookie, (unsigned)p_in, (unsigned)p_out,
366 s_size * 3/2);
8f0755c0
JM		 367 return;
368 }
369
370 dma_async_issue_pending(chan);
371}
372
373static void deinterlace_device_run(void *priv)
374{
375 struct deinterlace_ctx *ctx = priv;
376 struct deinterlace_q_data *dst_q_data;
377
378 atomic_set(&ctx->dev->busy, 1);
379
380 dprintk(ctx->dev, "%s: DMA try issue.\n", __func__);
381
382 dst_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
383
384 /*
385 * 4 possible field conversions are possible at the moment:
386 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_INTERLACED_TB:
387 * two separate fields in the same input buffer are interlaced
388 * in the output buffer using weaving. Top field comes first.
389 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_NONE:
390 * top field from the input buffer is copied to the output buffer
391 * using line doubling. Bottom field from the input buffer is discarded.
392 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_INTERLACED_BT:
393 * two separate fields in the same input buffer are interlaced
394 * in the output buffer using weaving. Bottom field comes first.
395 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_NONE:
396 * bottom field from the input buffer is copied to the output buffer
397 * using line doubling. Top field from the input buffer is discarded.
398 */
399 switch (dst_q_data->fmt->fourcc) {
400 case V4L2_PIX_FMT_YUV420:
401 switch (dst_q_data->field) {
402 case V4L2_FIELD_INTERLACED_TB:
403 case V4L2_FIELD_INTERLACED_BT:
404 dprintk(ctx->dev, "%s: yuv420 interlaced tb.\n",
405 __func__);
406 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);
407 deinterlace_issue_dma(ctx, YUV420_DMA_Y_EVEN, 0);
408 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);
409 deinterlace_issue_dma(ctx, YUV420_DMA_U_EVEN, 0);
410 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);
411 deinterlace_issue_dma(ctx, YUV420_DMA_V_EVEN, 1);
412 break;
413 case V4L2_FIELD_NONE:
414 default:
415 dprintk(ctx->dev, "%s: yuv420 interlaced line doubling.\n",
416 __func__);
417 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);
418 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD_DOUBLING, 0);
419 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);
420 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD_DOUBLING, 0);
421 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);
422 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD_DOUBLING, 1);
423 break;
424 }
425 break;
426 case V4L2_PIX_FMT_YUYV:
427 default:
428 switch (dst_q_data->field) {
429 case V4L2_FIELD_INTERLACED_TB:
430 case V4L2_FIELD_INTERLACED_BT:
431 dprintk(ctx->dev, "%s: yuyv interlaced_tb.\n",
432 __func__);
433 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);
434 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN, 1);
435 break;
436 case V4L2_FIELD_NONE:
437 default:
438 dprintk(ctx->dev, "%s: yuyv interlaced line doubling.\n",
439 __func__);
440 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);
441 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN_DOUBLING, 1);
442 break;
443 }
444 break;
445 }
446
447 dprintk(ctx->dev, "%s: DMA issue done.\n", __func__);
448}
449
450/*
451 * video ioctls
452 */
453static int vidioc_querycap(struct file *file, void *priv,
454 struct v4l2_capability *cap)
455{
456 strlcpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver));
457 strlcpy(cap->card, MEM2MEM_NAME, sizeof(cap->card));
458 strlcpy(cap->bus_info, MEM2MEM_NAME, sizeof(cap->card));
4703d356
SN		 459 /*
460 * This is only a mem-to-mem video device. The capture and output
461 * device capability flags are left only for backward compatibility
462 * and are scheduled for removal.
463 */
464 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT |
465 V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
8f0755c0
JM		 466 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
467
468 return 0;
469}
470
471static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
472{
473 int i, num;
474 struct deinterlace_fmt *fmt;
475
476 num = 0;
477
478 for (i = 0; i < NUM_FORMATS; ++i) {
479 if (formats[i].types & type) {
480 /* index-th format of type type found ? */
481 if (num == f->index)
482 break;
483 /* Correct type but haven't reached our index yet,
484 * just increment per-type index */
485 ++num;
486 }
487 }
488
489 if (i < NUM_FORMATS) {
490 /* Format found */
491 fmt = &formats[i];
492 strlcpy(f->description, fmt->name, sizeof(f->description));
493 f->pixelformat = fmt->fourcc;
494 return 0;
495 }
496
497 /* Format not found */
498 return -EINVAL;
499}
500
501static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
502 struct v4l2_fmtdesc *f)
503{
504 return enum_fmt(f, MEM2MEM_CAPTURE);
505}
506
507static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
508 struct v4l2_fmtdesc *f)
509{
510 return enum_fmt(f, MEM2MEM_OUTPUT);
511}
512
513static int vidioc_g_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
514{
515 struct vb2_queue *vq;
516 struct deinterlace_q_data *q_data;
517
518 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
519 if (!vq)
520 return -EINVAL;
521
522 q_data = get_q_data(f->type);
523
524 f->fmt.pix.width = q_data->width;
525 f->fmt.pix.height = q_data->height;
526 f->fmt.pix.field = q_data->field;
527 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
528
529 switch (q_data->fmt->fourcc) {
530 case V4L2_PIX_FMT_YUV420:
531 f->fmt.pix.bytesperline = q_data->width * 3 / 2;
532 break;
533 case V4L2_PIX_FMT_YUYV:
534 default:
535 f->fmt.pix.bytesperline = q_data->width * 2;
536 }
537
538 f->fmt.pix.sizeimage = q_data->sizeimage;
539 f->fmt.pix.colorspace = ctx->colorspace;
540
541 return 0;
542}
543
544static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
545 struct v4l2_format *f)
546{
547 return vidioc_g_fmt(priv, f);
548}
549
550static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
551 struct v4l2_format *f)
552{
553 return vidioc_g_fmt(priv, f);
554}
555
556static int vidioc_try_fmt(struct v4l2_format *f, struct deinterlace_fmt *fmt)
557{
558 switch (f->fmt.pix.pixelformat) {
559 case V4L2_PIX_FMT_YUV420:
560 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
561 break;
562 case V4L2_PIX_FMT_YUYV:
563 default:
564 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
565 }
566 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
567
568 return 0;
569}
570
571static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
572 struct v4l2_format *f)
573{
574 struct deinterlace_fmt *fmt;
575 struct deinterlace_ctx *ctx = priv;
576
577 fmt = find_format(f);
578 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE))
579 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
580
581 f->fmt.pix.colorspace = ctx->colorspace;
582
583 if (f->fmt.pix.field != V4L2_FIELD_INTERLACED_TB &&
584 f->fmt.pix.field != V4L2_FIELD_INTERLACED_BT &&
585 f->fmt.pix.field != V4L2_FIELD_NONE)
586 f->fmt.pix.field = V4L2_FIELD_INTERLACED_TB;
587
588 return vidioc_try_fmt(f, fmt);
589}
590
591static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
592 struct v4l2_format *f)
593{
594 struct deinterlace_fmt *fmt;
595
596 fmt = find_format(f);
597 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT))
598 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
599
600 if (!f->fmt.pix.colorspace)
601 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
602
603 if (f->fmt.pix.field != V4L2_FIELD_SEQ_TB &&
604 f->fmt.pix.field != V4L2_FIELD_SEQ_BT)
605 f->fmt.pix.field = V4L2_FIELD_SEQ_TB;
606
607 return vidioc_try_fmt(f, fmt);
608}
609
610static int vidioc_s_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
611{
612 struct deinterlace_q_data *q_data;
613 struct vb2_queue *vq;
614
615 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
616 if (!vq)
617 return -EINVAL;
618
619 q_data = get_q_data(f->type);
620 if (!q_data)
621 return -EINVAL;
622
623 if (vb2_is_busy(vq)) {
624 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
625 return -EBUSY;
626 }
627
628 q_data->fmt = find_format(f);
629 if (!q_data->fmt) {
630 v4l2_err(&ctx->dev->v4l2_dev,
631 "Couldn't set format type %d, wxh: %dx%d. fmt: %d, field: %d\n",
632 f->type, f->fmt.pix.width, f->fmt.pix.height,
633 f->fmt.pix.pixelformat, f->fmt.pix.field);
634 return -EINVAL;
635 }
636
637 q_data->width = f->fmt.pix.width;
638 q_data->height = f->fmt.pix.height;
639 q_data->field = f->fmt.pix.field;
640
641 switch (f->fmt.pix.pixelformat) {
642 case V4L2_PIX_FMT_YUV420:
643 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
644 q_data->sizeimage = (q_data->width * q_data->height * 3) / 2;
645 break;
646 case V4L2_PIX_FMT_YUYV:
647 default:
648 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
649 q_data->sizeimage = q_data->width * q_data->height * 2;
650 }
651
652 dprintk(ctx->dev,
653 "Setting format for type %d, wxh: %dx%d, fmt: %d, field: %d\n",
654 f->type, q_data->width, q_data->height, q_data->fmt->fourcc,
655 q_data->field);
656
657 return 0;
658}
659
660static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
661 struct v4l2_format *f)
662{
663 int ret;
664
665 ret = vidioc_try_fmt_vid_cap(file, priv, f);
666 if (ret)
667 return ret;
668 return vidioc_s_fmt(priv, f);
669}
670
671static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
672 struct v4l2_format *f)
673{
674 struct deinterlace_ctx *ctx = priv;
675 int ret;
676
677 ret = vidioc_try_fmt_vid_out(file, priv, f);
678 if (ret)
679 return ret;
680
681 ret = vidioc_s_fmt(priv, f);
682 if (!ret)
683 ctx->colorspace = f->fmt.pix.colorspace;
684
685 return ret;
686}
687
688static int vidioc_reqbufs(struct file *file, void *priv,
689 struct v4l2_requestbuffers *reqbufs)
690{
691 struct deinterlace_ctx *ctx = priv;
692
693 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
694}
695
696static int vidioc_querybuf(struct file *file, void *priv,
697 struct v4l2_buffer *buf)
698{
699 struct deinterlace_ctx *ctx = priv;
700
701 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
702}
703
704static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
705{
706 struct deinterlace_ctx *ctx = priv;
707
708 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
709}
710
711static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
712{
713 struct deinterlace_ctx *ctx = priv;
714
715 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
716}
717
718static int vidioc_streamon(struct file *file, void *priv,
719 enum v4l2_buf_type type)
720{
721 struct deinterlace_q_data *s_q_data, *d_q_data;
722 struct deinterlace_ctx *ctx = priv;
723
724 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
725 d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
726
727 /* Check that src and dst queues have the same pix format */
728 if (s_q_data->fmt->fourcc != d_q_data->fmt->fourcc) {
729 v4l2_err(&ctx->dev->v4l2_dev,
730 "src and dst formats don't match.\n");
731 return -EINVAL;
732 }
733
734 /* Check that input and output deinterlacing types are compatible */
735 switch (s_q_data->field) {
736 case V4L2_FIELD_SEQ_BT:
737 if (d_q_data->field != V4L2_FIELD_NONE &&
738 d_q_data->field != V4L2_FIELD_INTERLACED_BT) {
739 v4l2_err(&ctx->dev->v4l2_dev,
740 "src and dst field conversion [(%d)->(%d)] not supported.\n",
741 s_q_data->field, d_q_data->field);
742 return -EINVAL;
743 }
744 break;
745 case V4L2_FIELD_SEQ_TB:
746 if (d_q_data->field != V4L2_FIELD_NONE &&
747 d_q_data->field != V4L2_FIELD_INTERLACED_TB) {
748 v4l2_err(&ctx->dev->v4l2_dev,
749 "src and dst field conversion [(%d)->(%d)] not supported.\n",
750 s_q_data->field, d_q_data->field);
751 return -EINVAL;
752 }
753 break;
754 default:
755 return -EINVAL;
756 }
757
758 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
759}
760
761static int vidioc_streamoff(struct file *file, void *priv,
762 enum v4l2_buf_type type)
763{
764 struct deinterlace_ctx *ctx = priv;
765
766 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
767}
768
769static const struct v4l2_ioctl_ops deinterlace_ioctl_ops = {
770 .vidioc_querycap = vidioc_querycap,
771
772 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
773 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
774 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
775 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
776
777 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
778 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
779 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
780 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
781
782 .vidioc_reqbufs = vidioc_reqbufs,
783 .vidioc_querybuf = vidioc_querybuf,
784
785 .vidioc_qbuf = vidioc_qbuf,
786 .vidioc_dqbuf = vidioc_dqbuf,
787
788 .vidioc_streamon = vidioc_streamon,
789 .vidioc_streamoff = vidioc_streamoff,
790};
791
792
793/*
794 * Queue operations
795 */
796struct vb2_dc_conf {
797 struct device *dev;
798};
799
800static int deinterlace_queue_setup(struct vb2_queue *vq,
801 const struct v4l2_format *fmt,
802 unsigned int *nbuffers, unsigned int *nplanes,
803 unsigned int sizes[], void *alloc_ctxs[])
804{
805 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vq);
806 struct deinterlace_q_data *q_data;
807 unsigned int size, count = *nbuffers;
808
809 q_data = get_q_data(vq->type);
810
811 switch (q_data->fmt->fourcc) {
812 case V4L2_PIX_FMT_YUV420:
813 size = q_data->width * q_data->height * 3 / 2;
814 break;
815 case V4L2_PIX_FMT_YUYV:
816 default:
817 size = q_data->width * q_data->height * 2;
818 }
819
820 *nplanes = 1;
821 *nbuffers = count;
822 sizes[0] = size;
823
824 alloc_ctxs[0] = ctx->dev->alloc_ctx;
825
826 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
827
828 return 0;
829}
830
831static int deinterlace_buf_prepare(struct vb2_buffer *vb)
832{
833 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
834 struct deinterlace_q_data *q_data;
835
836 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
837
838 q_data = get_q_data(vb->vb2_queue->type);
839
840 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
841 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n",
842 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage);
843 return -EINVAL;
844 }
845
846 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
847
848 return 0;
849}
850
851static void deinterlace_buf_queue(struct vb2_buffer *vb)
852{
853 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
854 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
855}
856
857static struct vb2_ops deinterlace_qops = {
858 .queue_setup = deinterlace_queue_setup,
859 .buf_prepare = deinterlace_buf_prepare,
860 .buf_queue = deinterlace_buf_queue,
861};
862
863static int queue_init(void *priv, struct vb2_queue *src_vq,
864 struct vb2_queue *dst_vq)
865{
866 struct deinterlace_ctx *ctx = priv;
867 int ret;
868
8f0755c0
JM		 869 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
870 src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
871 src_vq->drv_priv = ctx;
872 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
873 src_vq->ops = &deinterlace_qops;
874 src_vq->mem_ops = &vb2_dma_contig_memops;
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
8f0755c0
JM		 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 q_data[V4L2_M2M_DST].fmt = &formats[0];
892 q_data[V4L2_M2M_DST].width = 640;
893 q_data[V4L2_M2M_DST].height = 480;
894 q_data[V4L2_M2M_DST].sizeimage = (640 * 480 * 3) / 2;
895 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_INTERLACED_TB;
896
897 return vb2_queue_init(dst_vq);
898}
899
900/*
901 * File operations
902 */
903static int deinterlace_open(struct file *file)
904{
905 struct deinterlace_dev *pcdev = video_drvdata(file);
906 struct deinterlace_ctx *ctx = NULL;
907
908 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
909 if (!ctx)
910 return -ENOMEM;
911
912 file->private_data = ctx;
913 ctx->dev = pcdev;
914
915 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
916 if (IS_ERR(ctx->m2m_ctx)) {
917 int ret = PTR_ERR(ctx->m2m_ctx);
918
919 kfree(ctx);
920 return ret;
921 }
922
923 ctx->xt = kzalloc(sizeof(struct dma_async_tx_descriptor) +
924 sizeof(struct data_chunk), GFP_KERNEL);
925 if (!ctx->xt) {
926 int ret = PTR_ERR(ctx->xt);
927
928 kfree(ctx);
929 return ret;
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
939static 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
953static 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
966static 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
973static 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
982static 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,
954f340f 988 .vfl_dir = VFL_DIR_M2M,
8f0755c0
JM		 989};
990
991static 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
999static 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 = kzalloc(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 goto free_dev;
1017
1018 if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) {
1019 v4l2_err(&pcdev->v4l2_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 = video_device_alloc();
1031 if (!vfd) {
1032 v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
1033 ret = -ENOMEM;
1034 goto unreg_dev;
1035 }
1036
1037 *vfd = deinterlace_videodev;
1038 vfd->lock = &pcdev->dev_mutex;
1039
1040 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
1041 if (ret) {
1042 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
1043 goto rel_vdev;
1044 }
1045
1046 video_set_drvdata(vfd, pcdev);
1047 snprintf(vfd->name, sizeof(vfd->name), "%s", deinterlace_videodev.name);
1048 pcdev->vfd = vfd;
1049 v4l2_info(&pcdev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME
1050 " Device registered as /dev/video%d\n", vfd->num);
1051
1052 platform_set_drvdata(pdev, pcdev);
1053
1054 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1055 if (IS_ERR(pcdev->alloc_ctx)) {
1056 v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n");
1057 ret = PTR_ERR(pcdev->alloc_ctx);
1058 goto err_ctx;
1059 }
1060
1061 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
1062 if (IS_ERR(pcdev->m2m_dev)) {
1063 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
1064 ret = PTR_ERR(pcdev->m2m_dev);
1065 goto err_m2m;
1066 }
1067
1068 return 0;
1069
1070 v4l2_m2m_release(pcdev->m2m_dev);
1071err_m2m:
1072 video_unregister_device(pcdev->vfd);
1073err_ctx:
1074 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1075rel_vdev:
1076 video_device_release(vfd);
1077unreg_dev:
1078 v4l2_device_unregister(&pcdev->v4l2_dev);
1079rel_dma:
1080 dma_release_channel(pcdev->dma_chan);
1081free_dev:
1082 kfree(pcdev);
1083
1084 return ret;
1085}
1086
1087static int deinterlace_remove(struct platform_device *pdev)
1088{
1089 struct deinterlace_dev *pcdev =
1090 (struct deinterlace_dev *)platform_get_drvdata(pdev);
1091
1092 v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME);
1093 v4l2_m2m_release(pcdev->m2m_dev);
1094 video_unregister_device(pcdev->vfd);
1095 v4l2_device_unregister(&pcdev->v4l2_dev);
1096 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1097 dma_release_channel(pcdev->dma_chan);
1098 kfree(pcdev);
1099
1100 return 0;
1101}
1102
1103static struct platform_driver deinterlace_pdrv = {
1104 .probe = deinterlace_probe,
1105 .remove = deinterlace_remove,
1106 .driver = {
1107 .name = MEM2MEM_NAME,
1108 .owner = THIS_MODULE,
1109 },
1110};
1111
1112static void __exit deinterlace_exit(void)
1113{
1114 platform_driver_unregister(&deinterlace_pdrv);
1115}
1116
1117static int __init deinterlace_init(void)
1118{
1119 return platform_driver_register(&deinterlace_pdrv);
1120}
1121
1122module_init(deinterlace_init);
1123module_exit(deinterlace_exit);
1124
Linux kernel - Deliverables
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