1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * V4L2 deinterlacing support.
4 *
5 * Copyright (c) 2012 Vista Silicon S.L.
6 * Javier Martin <javier.martin@vista-silicon.com>
7 */
8
9 #include <linux/module.h>
10 #include <linux/slab.h>
11 #include <linux/interrupt.h>
12 #include <linux/dmaengine.h>
13 #include <linux/platform_device.h>
14
15 #include <media/v4l2-mem2mem.h>
16 #include <media/v4l2-device.h>
17 #include <media/v4l2-ioctl.h>
18 #include <media/videobuf2-dma-contig.h>
19
20 #define MEM2MEM_TEST_MODULE_NAME "mem2mem-deinterlace"
21
22 MODULE_DESCRIPTION("mem2mem device which supports deinterlacing using dmaengine");
23 MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com");
24 MODULE_LICENSE("GPL");
25 MODULE_VERSION("0.0.1");
26
27 static bool debug;
28 module_param(debug, bool, 0644);
29
30 /* Flags that indicate a format can be used for capture/output */
31 #define MEM2MEM_CAPTURE (1 << 0)
32 #define MEM2MEM_OUTPUT (1 << 1)
33
34 #define MEM2MEM_NAME "m2m-deinterlace"
35
36 #define dprintk(dev, fmt, arg...) \
37 v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
38
39 struct deinterlace_fmt {
40 u32 fourcc;
41 /* Types the format can be used for */
42 u32 types;
43 };
44
45 static struct deinterlace_fmt formats[] = {
46 {
47 .fourcc = V4L2_PIX_FMT_YUV420,
48 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
49 },
50 {
51 .fourcc = V4L2_PIX_FMT_YUYV,
52 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
53 },
54 };
55
56 #define NUM_FORMATS ARRAY_SIZE(formats)
57
58 /* Per-queue, driver-specific private data */
59 struct deinterlace_q_data {
60 unsigned int width;
61 unsigned int height;
62 unsigned int sizeimage;
63 struct deinterlace_fmt *fmt;
64 enum v4l2_field field;
65 };
66
67 enum {
68 V4L2_M2M_SRC = 0,
69 V4L2_M2M_DST = 1,
70 };
71
72 enum {
73 YUV420_DMA_Y_ODD,
74 YUV420_DMA_Y_EVEN,
75 YUV420_DMA_U_ODD,
76 YUV420_DMA_U_EVEN,
77 YUV420_DMA_V_ODD,
78 YUV420_DMA_V_EVEN,
79 YUV420_DMA_Y_ODD_DOUBLING,
80 YUV420_DMA_U_ODD_DOUBLING,
81 YUV420_DMA_V_ODD_DOUBLING,
82 YUYV_DMA_ODD,
83 YUYV_DMA_EVEN,
84 YUYV_DMA_EVEN_DOUBLING,
85 };
86
87 /* Source and destination queue data */
88 static struct deinterlace_q_data q_data[2];
89
get_q_data(enum v4l2_buf_type type)90 static struct deinterlace_q_data *get_q_data(enum v4l2_buf_type type)
91 {
92 switch (type) {
93 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
94 return &q_data[V4L2_M2M_SRC];
95 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
96 return &q_data[V4L2_M2M_DST];
97 default:
98 BUG();
99 }
100 return NULL;
101 }
102
find_format(struct v4l2_format * f)103 static struct deinterlace_fmt *find_format(struct v4l2_format *f)
104 {
105 struct deinterlace_fmt *fmt;
106 unsigned int k;
107
108 for (k = 0; k < NUM_FORMATS; k++) {
109 fmt = &formats[k];
110 if ((fmt->types & f->type) &&
111 (fmt->fourcc == f->fmt.pix.pixelformat))
112 break;
113 }
114
115 if (k == NUM_FORMATS)
116 return NULL;
117
118 return &formats[k];
119 }
120
121 struct deinterlace_dev {
122 struct v4l2_device v4l2_dev;
123 struct video_device vfd;
124
125 atomic_t busy;
126 struct mutex dev_mutex;
127 spinlock_t irqlock;
128
129 struct dma_chan *dma_chan;
130
131 struct v4l2_m2m_dev *m2m_dev;
132 };
133
134 struct deinterlace_ctx {
135 struct v4l2_fh fh;
136 struct deinterlace_dev *dev;
137
138 /* Abort requested by m2m */
139 int aborting;
140 enum v4l2_colorspace colorspace;
141 dma_cookie_t cookie;
142 struct dma_interleaved_template *xt;
143 };
144
145 /*
146 * mem2mem callbacks
147 */
deinterlace_job_ready(void * priv)148 static int deinterlace_job_ready(void *priv)
149 {
150 struct deinterlace_ctx *ctx = priv;
151 struct deinterlace_dev *pcdev = ctx->dev;
152
153 if (v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx) > 0 &&
154 v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx) > 0 &&
155 !atomic_read(&ctx->dev->busy)) {
156 dprintk(pcdev, "Task ready\n");
157 return 1;
158 }
159
160 dprintk(pcdev, "Task not ready to run\n");
161
162 return 0;
163 }
164
deinterlace_job_abort(void * priv)165 static void deinterlace_job_abort(void *priv)
166 {
167 struct deinterlace_ctx *ctx = priv;
168 struct deinterlace_dev *pcdev = ctx->dev;
169
170 ctx->aborting = 1;
171
172 dprintk(pcdev, "Aborting task\n");
173
174 v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->fh.m2m_ctx);
175 }
176
dma_callback(void * data)177 static void dma_callback(void *data)
178 {
179 struct deinterlace_ctx *curr_ctx = data;
180 struct deinterlace_dev *pcdev = curr_ctx->dev;
181 struct vb2_v4l2_buffer *src_vb, *dst_vb;
182
183 atomic_set(&pcdev->busy, 0);
184
185 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);
186 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);
187
188 dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
189 dst_vb->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
190 dst_vb->flags |=
191 src_vb->flags & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
192 dst_vb->timecode = src_vb->timecode;
193
194 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
195 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
196
197 v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->fh.m2m_ctx);
198
199 dprintk(pcdev, "dma transfers completed.\n");
200 }
201
deinterlace_issue_dma(struct deinterlace_ctx * ctx,int op,int do_callback)202 static void deinterlace_issue_dma(struct deinterlace_ctx *ctx, int op,
203 int do_callback)
204 {
205 struct deinterlace_q_data *s_q_data;
206 struct vb2_v4l2_buffer *src_buf, *dst_buf;
207 struct deinterlace_dev *pcdev = ctx->dev;
208 struct dma_chan *chan = pcdev->dma_chan;
209 struct dma_device *dmadev = chan->device;
210 struct dma_async_tx_descriptor *tx;
211 unsigned int s_width, s_height;
212 unsigned int s_size;
213 dma_addr_t p_in, p_out;
214 enum dma_ctrl_flags flags;
215
216 src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
217 dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
218
219 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
220 s_width = s_q_data->width;
221 s_height = s_q_data->height;
222 s_size = s_width * s_height;
223
224 p_in = (dma_addr_t)vb2_dma_contig_plane_dma_addr(&src_buf->vb2_buf, 0);
225 p_out = (dma_addr_t)vb2_dma_contig_plane_dma_addr(&dst_buf->vb2_buf,
226 0);
227 if (!p_in || !p_out) {
228 v4l2_err(&pcdev->v4l2_dev,
229 "Acquiring kernel pointers to buffers failed\n");
230 return;
231 }
232
233 switch (op) {
234 case YUV420_DMA_Y_ODD:
235 ctx->xt->numf = s_height / 2;
236 ctx->xt->sgl[0].size = s_width;
237 ctx->xt->sgl[0].icg = s_width;
238 ctx->xt->src_start = p_in;
239 ctx->xt->dst_start = p_out;
240 break;
241 case YUV420_DMA_Y_EVEN:
242 ctx->xt->numf = s_height / 2;
243 ctx->xt->sgl[0].size = s_width;
244 ctx->xt->sgl[0].icg = s_width;
245 ctx->xt->src_start = p_in + s_size / 2;
246 ctx->xt->dst_start = p_out + s_width;
247 break;
248 case YUV420_DMA_U_ODD:
249 ctx->xt->numf = s_height / 4;
250 ctx->xt->sgl[0].size = s_width / 2;
251 ctx->xt->sgl[0].icg = s_width / 2;
252 ctx->xt->src_start = p_in + s_size;
253 ctx->xt->dst_start = p_out + s_size;
254 break;
255 case YUV420_DMA_U_EVEN:
256 ctx->xt->numf = s_height / 4;
257 ctx->xt->sgl[0].size = s_width / 2;
258 ctx->xt->sgl[0].icg = s_width / 2;
259 ctx->xt->src_start = p_in + (9 * s_size) / 8;
260 ctx->xt->dst_start = p_out + s_size + s_width / 2;
261 break;
262 case YUV420_DMA_V_ODD:
263 ctx->xt->numf = s_height / 4;
264 ctx->xt->sgl[0].size = s_width / 2;
265 ctx->xt->sgl[0].icg = s_width / 2;
266 ctx->xt->src_start = p_in + (5 * s_size) / 4;
267 ctx->xt->dst_start = p_out + (5 * s_size) / 4;
268 break;
269 case YUV420_DMA_V_EVEN:
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 + (11 * s_size) / 8;
274 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2;
275 break;
276 case YUV420_DMA_Y_ODD_DOUBLING:
277 ctx->xt->numf = s_height / 2;
278 ctx->xt->sgl[0].size = s_width;
279 ctx->xt->sgl[0].icg = s_width;
280 ctx->xt->src_start = p_in;
281 ctx->xt->dst_start = p_out + s_width;
282 break;
283 case YUV420_DMA_U_ODD_DOUBLING:
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 + s_size;
288 ctx->xt->dst_start = p_out + s_size + s_width / 2;
289 break;
290 case YUV420_DMA_V_ODD_DOUBLING:
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 + (5 * s_size) / 4;
295 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2;
296 break;
297 case YUYV_DMA_ODD:
298 ctx->xt->numf = s_height / 2;
299 ctx->xt->sgl[0].size = s_width * 2;
300 ctx->xt->sgl[0].icg = s_width * 2;
301 ctx->xt->src_start = p_in;
302 ctx->xt->dst_start = p_out;
303 break;
304 case YUYV_DMA_EVEN:
305 ctx->xt->numf = s_height / 2;
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_width * 2;
310 break;
311 case YUYV_DMA_EVEN_DOUBLING:
312 default:
313 ctx->xt->numf = s_height / 2;
314 ctx->xt->sgl[0].size = s_width * 2;
315 ctx->xt->sgl[0].icg = s_width * 2;
316 ctx->xt->src_start = p_in;
317 ctx->xt->dst_start = p_out + s_width * 2;
318 break;
319 }
320
321 /* Common parameters for al transfers */
322 ctx->xt->frame_size = 1;
323 ctx->xt->dir = DMA_MEM_TO_MEM;
324 ctx->xt->src_sgl = false;
325 ctx->xt->dst_sgl = true;
326 flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT;
327
328 tx = dmadev->device_prep_interleaved_dma(chan, ctx->xt, flags);
329 if (tx == NULL) {
330 v4l2_warn(&pcdev->v4l2_dev, "DMA interleaved prep error\n");
331 return;
332 }
333
334 if (do_callback) {
335 tx->callback = dma_callback;
336 tx->callback_param = ctx;
337 }
338
339 ctx->cookie = dmaengine_submit(tx);
340 if (dma_submit_error(ctx->cookie)) {
341 v4l2_warn(&pcdev->v4l2_dev,
342 "DMA submit error %d with src=0x%x dst=0x%x len=0x%x\n",
343 ctx->cookie, (unsigned)p_in, (unsigned)p_out,
344 s_size * 3/2);
345 return;
346 }
347
348 dma_async_issue_pending(chan);
349 }
350
deinterlace_device_run(void * priv)351 static void deinterlace_device_run(void *priv)
352 {
353 struct deinterlace_ctx *ctx = priv;
354 struct deinterlace_q_data *dst_q_data;
355
356 atomic_set(&ctx->dev->busy, 1);
357
358 dprintk(ctx->dev, "%s: DMA try issue.\n", __func__);
359
360 dst_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
361
362 /*
363 * 4 possible field conversions are possible at the moment:
364 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_INTERLACED_TB:
365 * two separate fields in the same input buffer are interlaced
366 * in the output buffer using weaving. Top field comes first.
367 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_NONE:
368 * top field from the input buffer is copied to the output buffer
369 * using line doubling. Bottom field from the input buffer is discarded.
370 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_INTERLACED_BT:
371 * two separate fields in the same input buffer are interlaced
372 * in the output buffer using weaving. Bottom field comes first.
373 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_NONE:
374 * bottom field from the input buffer is copied to the output buffer
375 * using line doubling. Top field from the input buffer is discarded.
376 */
377 switch (dst_q_data->fmt->fourcc) {
378 case V4L2_PIX_FMT_YUV420:
379 switch (dst_q_data->field) {
380 case V4L2_FIELD_INTERLACED_TB:
381 case V4L2_FIELD_INTERLACED_BT:
382 dprintk(ctx->dev, "%s: yuv420 interlaced tb.\n",
383 __func__);
384 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);
385 deinterlace_issue_dma(ctx, YUV420_DMA_Y_EVEN, 0);
386 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);
387 deinterlace_issue_dma(ctx, YUV420_DMA_U_EVEN, 0);
388 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);
389 deinterlace_issue_dma(ctx, YUV420_DMA_V_EVEN, 1);
390 break;
391 case V4L2_FIELD_NONE:
392 default:
393 dprintk(ctx->dev, "%s: yuv420 interlaced line doubling.\n",
394 __func__);
395 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);
396 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD_DOUBLING, 0);
397 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);
398 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD_DOUBLING, 0);
399 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);
400 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD_DOUBLING, 1);
401 break;
402 }
403 break;
404 case V4L2_PIX_FMT_YUYV:
405 default:
406 switch (dst_q_data->field) {
407 case V4L2_FIELD_INTERLACED_TB:
408 case V4L2_FIELD_INTERLACED_BT:
409 dprintk(ctx->dev, "%s: yuyv interlaced_tb.\n",
410 __func__);
411 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);
412 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN, 1);
413 break;
414 case V4L2_FIELD_NONE:
415 default:
416 dprintk(ctx->dev, "%s: yuyv interlaced line doubling.\n",
417 __func__);
418 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);
419 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN_DOUBLING, 1);
420 break;
421 }
422 break;
423 }
424
425 dprintk(ctx->dev, "%s: DMA issue done.\n", __func__);
426 }
427
428 /*
429 * video ioctls
430 */
vidioc_querycap(struct file * file,void * priv,struct v4l2_capability * cap)431 static int vidioc_querycap(struct file *file, void *priv,
432 struct v4l2_capability *cap)
433 {
434 strscpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver));
435 strscpy(cap->card, MEM2MEM_NAME, sizeof(cap->card));
436 strscpy(cap->bus_info, MEM2MEM_NAME, sizeof(cap->bus_info));
437 return 0;
438 }
439
enum_fmt(struct v4l2_fmtdesc * f,u32 type)440 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
441 {
442 int i, num;
443 struct deinterlace_fmt *fmt;
444
445 num = 0;
446
447 for (i = 0; i < NUM_FORMATS; ++i) {
448 if (formats[i].types & type) {
449 /* index-th format of type type found ? */
450 if (num == f->index)
451 break;
452 /* Correct type but haven't reached our index yet,
453 * just increment per-type index */
454 ++num;
455 }
456 }
457
458 if (i < NUM_FORMATS) {
459 /* Format found */
460 fmt = &formats[i];
461 f->pixelformat = fmt->fourcc;
462 return 0;
463 }
464
465 /* Format not found */
466 return -EINVAL;
467 }
468
vidioc_enum_fmt_vid_cap(struct file * file,void * priv,struct v4l2_fmtdesc * f)469 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
470 struct v4l2_fmtdesc *f)
471 {
472 return enum_fmt(f, MEM2MEM_CAPTURE);
473 }
474
vidioc_enum_fmt_vid_out(struct file * file,void * priv,struct v4l2_fmtdesc * f)475 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
476 struct v4l2_fmtdesc *f)
477 {
478 return enum_fmt(f, MEM2MEM_OUTPUT);
479 }
480
vidioc_g_fmt(struct deinterlace_ctx * ctx,struct v4l2_format * f)481 static int vidioc_g_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
482 {
483 struct vb2_queue *vq;
484 struct deinterlace_q_data *q_data;
485
486 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
487 if (!vq)
488 return -EINVAL;
489
490 q_data = get_q_data(f->type);
491
492 f->fmt.pix.width = q_data->width;
493 f->fmt.pix.height = q_data->height;
494 f->fmt.pix.field = q_data->field;
495 f->fmt.pix.pixelformat = q_data->fmt->fourcc;
496
497 switch (q_data->fmt->fourcc) {
498 case V4L2_PIX_FMT_YUV420:
499 f->fmt.pix.bytesperline = q_data->width * 3 / 2;
500 break;
501 case V4L2_PIX_FMT_YUYV:
502 default:
503 f->fmt.pix.bytesperline = q_data->width * 2;
504 }
505
506 f->fmt.pix.sizeimage = q_data->sizeimage;
507 f->fmt.pix.colorspace = ctx->colorspace;
508
509 return 0;
510 }
511
vidioc_g_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * f)512 static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
513 struct v4l2_format *f)
514 {
515 return vidioc_g_fmt(priv, f);
516 }
517
vidioc_g_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)518 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
519 struct v4l2_format *f)
520 {
521 return vidioc_g_fmt(priv, f);
522 }
523
vidioc_try_fmt(struct v4l2_format * f,struct deinterlace_fmt * fmt)524 static int vidioc_try_fmt(struct v4l2_format *f, struct deinterlace_fmt *fmt)
525 {
526 switch (f->fmt.pix.pixelformat) {
527 case V4L2_PIX_FMT_YUV420:
528 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
529 break;
530 case V4L2_PIX_FMT_YUYV:
531 default:
532 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
533 }
534 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
535
536 return 0;
537 }
538
vidioc_try_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)539 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
540 struct v4l2_format *f)
541 {
542 struct deinterlace_fmt *fmt;
543 struct deinterlace_ctx *ctx = priv;
544
545 fmt = find_format(f);
546 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE))
547 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
548
549 f->fmt.pix.colorspace = ctx->colorspace;
550
551 if (f->fmt.pix.field != V4L2_FIELD_INTERLACED_TB &&
552 f->fmt.pix.field != V4L2_FIELD_INTERLACED_BT &&
553 f->fmt.pix.field != V4L2_FIELD_NONE)
554 f->fmt.pix.field = V4L2_FIELD_INTERLACED_TB;
555
556 return vidioc_try_fmt(f, fmt);
557 }
558
vidioc_try_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * f)559 static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
560 struct v4l2_format *f)
561 {
562 struct deinterlace_fmt *fmt;
563
564 fmt = find_format(f);
565 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT))
566 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
567
568 if (!f->fmt.pix.colorspace)
569 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
570
571 if (f->fmt.pix.field != V4L2_FIELD_SEQ_TB &&
572 f->fmt.pix.field != V4L2_FIELD_SEQ_BT)
573 f->fmt.pix.field = V4L2_FIELD_SEQ_TB;
574
575 return vidioc_try_fmt(f, fmt);
576 }
577
vidioc_s_fmt(struct deinterlace_ctx * ctx,struct v4l2_format * f)578 static int vidioc_s_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
579 {
580 struct deinterlace_q_data *q_data;
581 struct vb2_queue *vq;
582
583 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
584 if (!vq)
585 return -EINVAL;
586
587 q_data = get_q_data(f->type);
588 if (!q_data)
589 return -EINVAL;
590
591 if (vb2_is_busy(vq)) {
592 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
593 return -EBUSY;
594 }
595
596 q_data->fmt = find_format(f);
597 if (!q_data->fmt) {
598 v4l2_err(&ctx->dev->v4l2_dev,
599 "Couldn't set format type %d, wxh: %dx%d. fmt: %d, field: %d\n",
600 f->type, f->fmt.pix.width, f->fmt.pix.height,
601 f->fmt.pix.pixelformat, f->fmt.pix.field);
602 return -EINVAL;
603 }
604
605 q_data->width = f->fmt.pix.width;
606 q_data->height = f->fmt.pix.height;
607 q_data->field = f->fmt.pix.field;
608
609 switch (f->fmt.pix.pixelformat) {
610 case V4L2_PIX_FMT_YUV420:
611 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
612 q_data->sizeimage = (q_data->width * q_data->height * 3) / 2;
613 break;
614 case V4L2_PIX_FMT_YUYV:
615 default:
616 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
617 q_data->sizeimage = q_data->width * q_data->height * 2;
618 }
619
620 dprintk(ctx->dev,
621 "Setting format for type %d, wxh: %dx%d, fmt: %d, field: %d\n",
622 f->type, q_data->width, q_data->height, q_data->fmt->fourcc,
623 q_data->field);
624
625 return 0;
626 }
627
vidioc_s_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)628 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
629 struct v4l2_format *f)
630 {
631 int ret;
632
633 ret = vidioc_try_fmt_vid_cap(file, priv, f);
634 if (ret)
635 return ret;
636 return vidioc_s_fmt(priv, f);
637 }
638
vidioc_s_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * f)639 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
640 struct v4l2_format *f)
641 {
642 struct deinterlace_ctx *ctx = priv;
643 int ret;
644
645 ret = vidioc_try_fmt_vid_out(file, priv, f);
646 if (ret)
647 return ret;
648
649 ret = vidioc_s_fmt(priv, f);
650 if (!ret)
651 ctx->colorspace = f->fmt.pix.colorspace;
652
653 return ret;
654 }
655
vidioc_streamon(struct file * file,void * priv,enum v4l2_buf_type type)656 static int vidioc_streamon(struct file *file, void *priv,
657 enum v4l2_buf_type type)
658 {
659 struct deinterlace_q_data *s_q_data, *d_q_data;
660 struct deinterlace_ctx *ctx = priv;
661
662 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
663 d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
664
665 /* Check that src and dst queues have the same pix format */
666 if (s_q_data->fmt->fourcc != d_q_data->fmt->fourcc) {
667 v4l2_err(&ctx->dev->v4l2_dev,
668 "src and dst formats don't match.\n");
669 return -EINVAL;
670 }
671
672 /* Check that input and output deinterlacing types are compatible */
673 switch (s_q_data->field) {
674 case V4L2_FIELD_SEQ_BT:
675 if (d_q_data->field != V4L2_FIELD_NONE &&
676 d_q_data->field != V4L2_FIELD_INTERLACED_BT) {
677 v4l2_err(&ctx->dev->v4l2_dev,
678 "src and dst field conversion [(%d)->(%d)] not supported.\n",
679 s_q_data->field, d_q_data->field);
680 return -EINVAL;
681 }
682 break;
683 case V4L2_FIELD_SEQ_TB:
684 if (d_q_data->field != V4L2_FIELD_NONE &&
685 d_q_data->field != V4L2_FIELD_INTERLACED_TB) {
686 v4l2_err(&ctx->dev->v4l2_dev,
687 "src and dst field conversion [(%d)->(%d)] not supported.\n",
688 s_q_data->field, d_q_data->field);
689 return -EINVAL;
690 }
691 break;
692 default:
693 return -EINVAL;
694 }
695
696 return v4l2_m2m_streamon(file, ctx->fh.m2m_ctx, type);
697 }
698
699 static const struct v4l2_ioctl_ops deinterlace_ioctl_ops = {
700 .vidioc_querycap = vidioc_querycap,
701
702 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
703 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
704 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
705 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
706
707 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
708 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
709 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
710 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
711
712 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
713 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
714 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
715 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
716 .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf,
717 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
718
719 .vidioc_streamon = vidioc_streamon,
720 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
721 };
722
723
724 /*
725 * Queue operations
726 */
727 struct vb2_dc_conf {
728 struct device *dev;
729 };
730
deinterlace_queue_setup(struct vb2_queue * vq,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])731 static int deinterlace_queue_setup(struct vb2_queue *vq,
732 unsigned int *nbuffers, unsigned int *nplanes,
733 unsigned int sizes[], struct device *alloc_devs[])
734 {
735 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vq);
736 struct deinterlace_q_data *q_data;
737 unsigned int size, count = *nbuffers;
738
739 q_data = get_q_data(vq->type);
740
741 switch (q_data->fmt->fourcc) {
742 case V4L2_PIX_FMT_YUV420:
743 size = q_data->width * q_data->height * 3 / 2;
744 break;
745 case V4L2_PIX_FMT_YUYV:
746 default:
747 size = q_data->width * q_data->height * 2;
748 }
749
750 *nplanes = 1;
751 *nbuffers = count;
752 sizes[0] = size;
753
754 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
755
756 return 0;
757 }
758
deinterlace_buf_prepare(struct vb2_buffer * vb)759 static int deinterlace_buf_prepare(struct vb2_buffer *vb)
760 {
761 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
762 struct deinterlace_q_data *q_data;
763
764 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
765
766 q_data = get_q_data(vb->vb2_queue->type);
767
768 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
769 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n",
770 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage);
771 return -EINVAL;
772 }
773
774 vb2_set_plane_payload(vb, 0, q_data->sizeimage);
775
776 return 0;
777 }
778
deinterlace_buf_queue(struct vb2_buffer * vb)779 static void deinterlace_buf_queue(struct vb2_buffer *vb)
780 {
781 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
782 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
783
784 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
785 }
786
787 static const struct vb2_ops deinterlace_qops = {
788 .queue_setup = deinterlace_queue_setup,
789 .buf_prepare = deinterlace_buf_prepare,
790 .buf_queue = deinterlace_buf_queue,
791 .wait_prepare = vb2_ops_wait_prepare,
792 .wait_finish = vb2_ops_wait_finish,
793 };
794
queue_init(void * priv,struct vb2_queue * src_vq,struct vb2_queue * dst_vq)795 static int queue_init(void *priv, struct vb2_queue *src_vq,
796 struct vb2_queue *dst_vq)
797 {
798 struct deinterlace_ctx *ctx = priv;
799 int ret;
800
801 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
802 src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
803 src_vq->drv_priv = ctx;
804 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
805 src_vq->ops = &deinterlace_qops;
806 src_vq->mem_ops = &vb2_dma_contig_memops;
807 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
808 src_vq->dev = ctx->dev->v4l2_dev.dev;
809 src_vq->lock = &ctx->dev->dev_mutex;
810 q_data[V4L2_M2M_SRC].fmt = &formats[0];
811 q_data[V4L2_M2M_SRC].width = 640;
812 q_data[V4L2_M2M_SRC].height = 480;
813 q_data[V4L2_M2M_SRC].sizeimage = (640 * 480 * 3) / 2;
814 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_SEQ_TB;
815
816 ret = vb2_queue_init(src_vq);
817 if (ret)
818 return ret;
819
820 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
821 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
822 dst_vq->drv_priv = ctx;
823 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
824 dst_vq->ops = &deinterlace_qops;
825 dst_vq->mem_ops = &vb2_dma_contig_memops;
826 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
827 dst_vq->dev = ctx->dev->v4l2_dev.dev;
828 dst_vq->lock = &ctx->dev->dev_mutex;
829 q_data[V4L2_M2M_DST].fmt = &formats[0];
830 q_data[V4L2_M2M_DST].width = 640;
831 q_data[V4L2_M2M_DST].height = 480;
832 q_data[V4L2_M2M_DST].sizeimage = (640 * 480 * 3) / 2;
833 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_INTERLACED_TB;
834
835 return vb2_queue_init(dst_vq);
836 }
837
838 /*
839 * File operations
840 */
deinterlace_open(struct file * file)841 static int deinterlace_open(struct file *file)
842 {
843 struct deinterlace_dev *pcdev = video_drvdata(file);
844 struct deinterlace_ctx *ctx = NULL;
845
846 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
847 if (!ctx)
848 return -ENOMEM;
849
850 v4l2_fh_init(&ctx->fh, video_devdata(file));
851 file->private_data = &ctx->fh;
852 ctx->dev = pcdev;
853
854 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
855 if (IS_ERR(ctx->fh.m2m_ctx)) {
856 int ret = PTR_ERR(ctx->fh.m2m_ctx);
857
858 kfree(ctx);
859 return ret;
860 }
861
862 ctx->xt = kzalloc(sizeof(struct dma_interleaved_template) +
863 sizeof(struct data_chunk), GFP_KERNEL);
864 if (!ctx->xt) {
865 kfree(ctx);
866 return -ENOMEM;
867 }
868
869 ctx->colorspace = V4L2_COLORSPACE_REC709;
870 v4l2_fh_add(&ctx->fh);
871
872 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n",
873 ctx, ctx->fh.m2m_ctx);
874
875 return 0;
876 }
877
deinterlace_release(struct file * file)878 static int deinterlace_release(struct file *file)
879 {
880 struct deinterlace_dev *pcdev = video_drvdata(file);
881 struct deinterlace_ctx *ctx = file->private_data;
882
883 dprintk(pcdev, "Releasing instance %p\n", ctx);
884
885 v4l2_fh_del(&ctx->fh);
886 v4l2_fh_exit(&ctx->fh);
887 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
888 kfree(ctx->xt);
889 kfree(ctx);
890
891 return 0;
892 }
893
894 static const struct v4l2_file_operations deinterlace_fops = {
895 .owner = THIS_MODULE,
896 .open = deinterlace_open,
897 .release = deinterlace_release,
898 .poll = v4l2_m2m_fop_poll,
899 .unlocked_ioctl = video_ioctl2,
900 .mmap = v4l2_m2m_fop_mmap,
901 };
902
903 static const struct video_device deinterlace_videodev = {
904 .name = MEM2MEM_NAME,
905 .fops = &deinterlace_fops,
906 .ioctl_ops = &deinterlace_ioctl_ops,
907 .minor = -1,
908 .release = video_device_release_empty,
909 .vfl_dir = VFL_DIR_M2M,
910 .device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING,
911 };
912
913 static const struct v4l2_m2m_ops m2m_ops = {
914 .device_run = deinterlace_device_run,
915 .job_ready = deinterlace_job_ready,
916 .job_abort = deinterlace_job_abort,
917 };
918
deinterlace_probe(struct platform_device * pdev)919 static int deinterlace_probe(struct platform_device *pdev)
920 {
921 struct deinterlace_dev *pcdev;
922 struct video_device *vfd;
923 dma_cap_mask_t mask;
924 int ret = 0;
925
926 pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
927 if (!pcdev)
928 return -ENOMEM;
929
930 spin_lock_init(&pcdev->irqlock);
931
932 dma_cap_zero(mask);
933 dma_cap_set(DMA_INTERLEAVE, mask);
934 pcdev->dma_chan = dma_request_channel(mask, NULL, pcdev);
935 if (!pcdev->dma_chan)
936 return -ENODEV;
937
938 if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) {
939 dev_err(&pdev->dev, "DMA does not support INTERLEAVE\n");
940 ret = -ENODEV;
941 goto rel_dma;
942 }
943
944 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
945 if (ret)
946 goto rel_dma;
947
948 atomic_set(&pcdev->busy, 0);
949 mutex_init(&pcdev->dev_mutex);
950
951 vfd = &pcdev->vfd;
952 *vfd = deinterlace_videodev;
953 vfd->lock = &pcdev->dev_mutex;
954 vfd->v4l2_dev = &pcdev->v4l2_dev;
955
956 ret = video_register_device(vfd, VFL_TYPE_VIDEO, 0);
957 if (ret) {
958 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
959 goto unreg_dev;
960 }
961
962 video_set_drvdata(vfd, pcdev);
963 v4l2_info(&pcdev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME
964 " Device registered as /dev/video%d\n", vfd->num);
965
966 platform_set_drvdata(pdev, pcdev);
967
968 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
969 if (IS_ERR(pcdev->m2m_dev)) {
970 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
971 ret = PTR_ERR(pcdev->m2m_dev);
972 goto err_m2m;
973 }
974
975 return 0;
976
977 err_m2m:
978 video_unregister_device(&pcdev->vfd);
979 unreg_dev:
980 v4l2_device_unregister(&pcdev->v4l2_dev);
981 rel_dma:
982 dma_release_channel(pcdev->dma_chan);
983
984 return ret;
985 }
986
deinterlace_remove(struct platform_device * pdev)987 static int deinterlace_remove(struct platform_device *pdev)
988 {
989 struct deinterlace_dev *pcdev = platform_get_drvdata(pdev);
990
991 v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME);
992 v4l2_m2m_release(pcdev->m2m_dev);
993 video_unregister_device(&pcdev->vfd);
994 v4l2_device_unregister(&pcdev->v4l2_dev);
995 dma_release_channel(pcdev->dma_chan);
996
997 return 0;
998 }
999
1000 static struct platform_driver deinterlace_pdrv = {
1001 .probe = deinterlace_probe,
1002 .remove = deinterlace_remove,
1003 .driver = {
1004 .name = MEM2MEM_NAME,
1005 },
1006 };
1007 module_platform_driver(deinterlace_pdrv);
1008
1009