1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * TI Camera Access Layer (CAL) - Video Device
4 *
5 * Copyright (c) 2015-2020 Texas Instruments Inc.
6 *
7 * Authors:
8 * Benoit Parrot <bparrot@ti.com>
9 * Laurent Pinchart <laurent.pinchart@ideasonboard.com>
10 */
11
12 #include <linux/ioctl.h>
13 #include <linux/pm_runtime.h>
14 #include <linux/videodev2.h>
15
16 #include <media/media-device.h>
17 #include <media/v4l2-common.h>
18 #include <media/v4l2-ctrls.h>
19 #include <media/v4l2-device.h>
20 #include <media/v4l2-event.h>
21 #include <media/v4l2-fh.h>
22 #include <media/v4l2-ioctl.h>
23 #include <media/videobuf2-core.h>
24 #include <media/videobuf2-dma-contig.h>
25
26 #include "cal.h"
27
28 /* Print Four-character-code (FOURCC) */
fourcc_to_str(u32 fmt)29 static char *fourcc_to_str(u32 fmt)
30 {
31 static char code[5];
32
33 code[0] = (unsigned char)(fmt & 0xff);
34 code[1] = (unsigned char)((fmt >> 8) & 0xff);
35 code[2] = (unsigned char)((fmt >> 16) & 0xff);
36 code[3] = (unsigned char)((fmt >> 24) & 0xff);
37 code[4] = '\0';
38
39 return code;
40 }
41
42 /* ------------------------------------------------------------------
43 * V4L2 Common IOCTLs
44 * ------------------------------------------------------------------
45 */
46
cal_querycap(struct file * file,void * priv,struct v4l2_capability * cap)47 static int cal_querycap(struct file *file, void *priv,
48 struct v4l2_capability *cap)
49 {
50 strscpy(cap->driver, CAL_MODULE_NAME, sizeof(cap->driver));
51 strscpy(cap->card, CAL_MODULE_NAME, sizeof(cap->card));
52
53 return 0;
54 }
55
cal_g_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)56 static int cal_g_fmt_vid_cap(struct file *file, void *priv,
57 struct v4l2_format *f)
58 {
59 struct cal_ctx *ctx = video_drvdata(file);
60
61 *f = ctx->v_fmt;
62
63 return 0;
64 }
65
66 /* ------------------------------------------------------------------
67 * V4L2 Video Node Centric IOCTLs
68 * ------------------------------------------------------------------
69 */
70
find_format_by_pix(struct cal_ctx * ctx,u32 pixelformat)71 static const struct cal_format_info *find_format_by_pix(struct cal_ctx *ctx,
72 u32 pixelformat)
73 {
74 const struct cal_format_info *fmtinfo;
75 unsigned int k;
76
77 for (k = 0; k < ctx->num_active_fmt; k++) {
78 fmtinfo = ctx->active_fmt[k];
79 if (fmtinfo->fourcc == pixelformat)
80 return fmtinfo;
81 }
82
83 return NULL;
84 }
85
find_format_by_code(struct cal_ctx * ctx,u32 code)86 static const struct cal_format_info *find_format_by_code(struct cal_ctx *ctx,
87 u32 code)
88 {
89 const struct cal_format_info *fmtinfo;
90 unsigned int k;
91
92 for (k = 0; k < ctx->num_active_fmt; k++) {
93 fmtinfo = ctx->active_fmt[k];
94 if (fmtinfo->code == code)
95 return fmtinfo;
96 }
97
98 return NULL;
99 }
100
cal_legacy_enum_fmt_vid_cap(struct file * file,void * priv,struct v4l2_fmtdesc * f)101 static int cal_legacy_enum_fmt_vid_cap(struct file *file, void *priv,
102 struct v4l2_fmtdesc *f)
103 {
104 struct cal_ctx *ctx = video_drvdata(file);
105 const struct cal_format_info *fmtinfo;
106
107 if (f->index >= ctx->num_active_fmt)
108 return -EINVAL;
109
110 fmtinfo = ctx->active_fmt[f->index];
111
112 f->pixelformat = fmtinfo->fourcc;
113 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
114 return 0;
115 }
116
__subdev_get_format(struct cal_ctx * ctx,struct v4l2_mbus_framefmt * fmt)117 static int __subdev_get_format(struct cal_ctx *ctx,
118 struct v4l2_mbus_framefmt *fmt)
119 {
120 struct v4l2_subdev_format sd_fmt;
121 struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format;
122 int ret;
123
124 sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
125 sd_fmt.pad = 0;
126
127 ret = v4l2_subdev_call(ctx->phy->source, pad, get_fmt, NULL, &sd_fmt);
128 if (ret)
129 return ret;
130
131 *fmt = *mbus_fmt;
132
133 ctx_dbg(1, ctx, "%s %dx%d code:%04X\n", __func__,
134 fmt->width, fmt->height, fmt->code);
135
136 return 0;
137 }
138
__subdev_set_format(struct cal_ctx * ctx,struct v4l2_mbus_framefmt * fmt)139 static int __subdev_set_format(struct cal_ctx *ctx,
140 struct v4l2_mbus_framefmt *fmt)
141 {
142 struct v4l2_subdev_format sd_fmt;
143 struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format;
144 int ret;
145
146 sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
147 sd_fmt.pad = 0;
148 *mbus_fmt = *fmt;
149
150 ret = v4l2_subdev_call(ctx->phy->source, pad, set_fmt, NULL, &sd_fmt);
151 if (ret)
152 return ret;
153
154 ctx_dbg(1, ctx, "%s %dx%d code:%04X\n", __func__,
155 fmt->width, fmt->height, fmt->code);
156
157 return 0;
158 }
159
cal_calc_format_size(struct cal_ctx * ctx,const struct cal_format_info * fmtinfo,struct v4l2_format * f)160 static void cal_calc_format_size(struct cal_ctx *ctx,
161 const struct cal_format_info *fmtinfo,
162 struct v4l2_format *f)
163 {
164 u32 bpl, max_width;
165
166 /*
167 * Maximum width is bound by the DMA max width in bytes.
168 * We need to recalculate the actual maxi width depending on the
169 * number of bytes per pixels required.
170 */
171 max_width = CAL_MAX_WIDTH_BYTES / (ALIGN(fmtinfo->bpp, 8) >> 3);
172 v4l_bound_align_image(&f->fmt.pix.width, 48, max_width, 2,
173 &f->fmt.pix.height, 32, CAL_MAX_HEIGHT_LINES,
174 0, 0);
175
176 bpl = (f->fmt.pix.width * ALIGN(fmtinfo->bpp, 8)) >> 3;
177 f->fmt.pix.bytesperline = ALIGN(bpl, 16);
178
179 f->fmt.pix.sizeimage = f->fmt.pix.height *
180 f->fmt.pix.bytesperline;
181
182 ctx_dbg(3, ctx, "%s: fourcc: %s size: %dx%d bpl:%d img_size:%d\n",
183 __func__, fourcc_to_str(f->fmt.pix.pixelformat),
184 f->fmt.pix.width, f->fmt.pix.height,
185 f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
186 }
187
cal_legacy_try_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)188 static int cal_legacy_try_fmt_vid_cap(struct file *file, void *priv,
189 struct v4l2_format *f)
190 {
191 struct cal_ctx *ctx = video_drvdata(file);
192 const struct cal_format_info *fmtinfo;
193 struct v4l2_subdev_frame_size_enum fse;
194 int found;
195
196 fmtinfo = find_format_by_pix(ctx, f->fmt.pix.pixelformat);
197 if (!fmtinfo) {
198 ctx_dbg(3, ctx, "Fourcc format (0x%08x) not found.\n",
199 f->fmt.pix.pixelformat);
200
201 /* Just get the first one enumerated */
202 fmtinfo = ctx->active_fmt[0];
203 f->fmt.pix.pixelformat = fmtinfo->fourcc;
204 }
205
206 f->fmt.pix.field = ctx->v_fmt.fmt.pix.field;
207
208 /* check for/find a valid width/height */
209 found = false;
210 fse.pad = 0;
211 fse.code = fmtinfo->code;
212 fse.which = V4L2_SUBDEV_FORMAT_ACTIVE;
213 for (fse.index = 0; ; fse.index++) {
214 int ret;
215
216 ret = v4l2_subdev_call(ctx->phy->source, pad, enum_frame_size,
217 NULL, &fse);
218 if (ret)
219 break;
220
221 if ((f->fmt.pix.width == fse.max_width) &&
222 (f->fmt.pix.height == fse.max_height)) {
223 found = true;
224 break;
225 } else if ((f->fmt.pix.width >= fse.min_width) &&
226 (f->fmt.pix.width <= fse.max_width) &&
227 (f->fmt.pix.height >= fse.min_height) &&
228 (f->fmt.pix.height <= fse.max_height)) {
229 found = true;
230 break;
231 }
232 }
233
234 if (!found) {
235 /* use existing values as default */
236 f->fmt.pix.width = ctx->v_fmt.fmt.pix.width;
237 f->fmt.pix.height = ctx->v_fmt.fmt.pix.height;
238 }
239
240 /*
241 * Use current colorspace for now, it will get
242 * updated properly during s_fmt
243 */
244 f->fmt.pix.colorspace = ctx->v_fmt.fmt.pix.colorspace;
245 cal_calc_format_size(ctx, fmtinfo, f);
246 return 0;
247 }
248
cal_legacy_s_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)249 static int cal_legacy_s_fmt_vid_cap(struct file *file, void *priv,
250 struct v4l2_format *f)
251 {
252 struct cal_ctx *ctx = video_drvdata(file);
253 struct vb2_queue *q = &ctx->vb_vidq;
254 struct v4l2_subdev_format sd_fmt = {
255 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
256 .pad = CAL_CAMERARX_PAD_SINK,
257 };
258 const struct cal_format_info *fmtinfo;
259 int ret;
260
261 if (vb2_is_busy(q)) {
262 ctx_dbg(3, ctx, "%s device busy\n", __func__);
263 return -EBUSY;
264 }
265
266 ret = cal_legacy_try_fmt_vid_cap(file, priv, f);
267 if (ret < 0)
268 return ret;
269
270 fmtinfo = find_format_by_pix(ctx, f->fmt.pix.pixelformat);
271
272 v4l2_fill_mbus_format(&sd_fmt.format, &f->fmt.pix, fmtinfo->code);
273
274 ret = __subdev_set_format(ctx, &sd_fmt.format);
275 if (ret)
276 return ret;
277
278 /* Just double check nothing has gone wrong */
279 if (sd_fmt.format.code != fmtinfo->code) {
280 ctx_dbg(3, ctx,
281 "%s subdev changed format on us, this should not happen\n",
282 __func__);
283 return -EINVAL;
284 }
285
286 v4l2_fill_pix_format(&ctx->v_fmt.fmt.pix, &sd_fmt.format);
287 ctx->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
288 ctx->v_fmt.fmt.pix.pixelformat = fmtinfo->fourcc;
289 ctx->v_fmt.fmt.pix.field = sd_fmt.format.field;
290 cal_calc_format_size(ctx, fmtinfo, &ctx->v_fmt);
291
292 v4l2_subdev_call(&ctx->phy->subdev, pad, set_fmt, NULL, &sd_fmt);
293
294 ctx->fmtinfo = fmtinfo;
295 *f = ctx->v_fmt;
296
297 return 0;
298 }
299
cal_legacy_enum_framesizes(struct file * file,void * fh,struct v4l2_frmsizeenum * fsize)300 static int cal_legacy_enum_framesizes(struct file *file, void *fh,
301 struct v4l2_frmsizeenum *fsize)
302 {
303 struct cal_ctx *ctx = video_drvdata(file);
304 const struct cal_format_info *fmtinfo;
305 struct v4l2_subdev_frame_size_enum fse;
306 int ret;
307
308 /* check for valid format */
309 fmtinfo = find_format_by_pix(ctx, fsize->pixel_format);
310 if (!fmtinfo) {
311 ctx_dbg(3, ctx, "Invalid pixel code: %x\n",
312 fsize->pixel_format);
313 return -EINVAL;
314 }
315
316 fse.index = fsize->index;
317 fse.pad = 0;
318 fse.code = fmtinfo->code;
319 fse.which = V4L2_SUBDEV_FORMAT_ACTIVE;
320
321 ret = v4l2_subdev_call(ctx->phy->source, pad, enum_frame_size, NULL,
322 &fse);
323 if (ret)
324 return ret;
325
326 ctx_dbg(1, ctx, "%s: index: %d code: %x W:[%d,%d] H:[%d,%d]\n",
327 __func__, fse.index, fse.code, fse.min_width, fse.max_width,
328 fse.min_height, fse.max_height);
329
330 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
331 fsize->discrete.width = fse.max_width;
332 fsize->discrete.height = fse.max_height;
333
334 return 0;
335 }
336
cal_legacy_enum_input(struct file * file,void * priv,struct v4l2_input * inp)337 static int cal_legacy_enum_input(struct file *file, void *priv,
338 struct v4l2_input *inp)
339 {
340 if (inp->index > 0)
341 return -EINVAL;
342
343 inp->type = V4L2_INPUT_TYPE_CAMERA;
344 sprintf(inp->name, "Camera %u", inp->index);
345 return 0;
346 }
347
cal_legacy_g_input(struct file * file,void * priv,unsigned int * i)348 static int cal_legacy_g_input(struct file *file, void *priv, unsigned int *i)
349 {
350 *i = 0;
351 return 0;
352 }
353
cal_legacy_s_input(struct file * file,void * priv,unsigned int i)354 static int cal_legacy_s_input(struct file *file, void *priv, unsigned int i)
355 {
356 return i > 0 ? -EINVAL : 0;
357 }
358
359 /* timeperframe is arbitrary and continuous */
cal_legacy_enum_frameintervals(struct file * file,void * priv,struct v4l2_frmivalenum * fival)360 static int cal_legacy_enum_frameintervals(struct file *file, void *priv,
361 struct v4l2_frmivalenum *fival)
362 {
363 struct cal_ctx *ctx = video_drvdata(file);
364 const struct cal_format_info *fmtinfo;
365 struct v4l2_subdev_frame_interval_enum fie = {
366 .index = fival->index,
367 .width = fival->width,
368 .height = fival->height,
369 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
370 };
371 int ret;
372
373 fmtinfo = find_format_by_pix(ctx, fival->pixel_format);
374 if (!fmtinfo)
375 return -EINVAL;
376
377 fie.code = fmtinfo->code;
378 ret = v4l2_subdev_call(ctx->phy->source, pad, enum_frame_interval,
379 NULL, &fie);
380 if (ret)
381 return ret;
382 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
383 fival->discrete = fie.interval;
384
385 return 0;
386 }
387
cal_legacy_g_parm(struct file * file,void * fh,struct v4l2_streamparm * a)388 static int cal_legacy_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
389 {
390 struct cal_ctx *ctx = video_drvdata(file);
391
392 return v4l2_g_parm_cap(video_devdata(file), ctx->phy->source, a);
393 }
394
cal_legacy_s_parm(struct file * file,void * fh,struct v4l2_streamparm * a)395 static int cal_legacy_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
396 {
397 struct cal_ctx *ctx = video_drvdata(file);
398
399 return v4l2_s_parm_cap(video_devdata(file), ctx->phy->source, a);
400 }
401
402 static const struct v4l2_ioctl_ops cal_ioctl_legacy_ops = {
403 .vidioc_querycap = cal_querycap,
404 .vidioc_enum_fmt_vid_cap = cal_legacy_enum_fmt_vid_cap,
405 .vidioc_g_fmt_vid_cap = cal_g_fmt_vid_cap,
406 .vidioc_try_fmt_vid_cap = cal_legacy_try_fmt_vid_cap,
407 .vidioc_s_fmt_vid_cap = cal_legacy_s_fmt_vid_cap,
408 .vidioc_enum_framesizes = cal_legacy_enum_framesizes,
409 .vidioc_reqbufs = vb2_ioctl_reqbufs,
410 .vidioc_create_bufs = vb2_ioctl_create_bufs,
411 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
412 .vidioc_querybuf = vb2_ioctl_querybuf,
413 .vidioc_qbuf = vb2_ioctl_qbuf,
414 .vidioc_dqbuf = vb2_ioctl_dqbuf,
415 .vidioc_expbuf = vb2_ioctl_expbuf,
416 .vidioc_enum_input = cal_legacy_enum_input,
417 .vidioc_g_input = cal_legacy_g_input,
418 .vidioc_s_input = cal_legacy_s_input,
419 .vidioc_enum_frameintervals = cal_legacy_enum_frameintervals,
420 .vidioc_streamon = vb2_ioctl_streamon,
421 .vidioc_streamoff = vb2_ioctl_streamoff,
422 .vidioc_log_status = v4l2_ctrl_log_status,
423 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
424 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
425 .vidioc_g_parm = cal_legacy_g_parm,
426 .vidioc_s_parm = cal_legacy_s_parm,
427 };
428
429 /* ------------------------------------------------------------------
430 * V4L2 Media Controller Centric IOCTLs
431 * ------------------------------------------------------------------
432 */
433
cal_mc_enum_fmt_vid_cap(struct file * file,void * priv,struct v4l2_fmtdesc * f)434 static int cal_mc_enum_fmt_vid_cap(struct file *file, void *priv,
435 struct v4l2_fmtdesc *f)
436 {
437 unsigned int i;
438 unsigned int idx;
439
440 if (f->index >= cal_num_formats)
441 return -EINVAL;
442
443 idx = 0;
444
445 for (i = 0; i < cal_num_formats; ++i) {
446 if (f->mbus_code && cal_formats[i].code != f->mbus_code)
447 continue;
448
449 if (idx == f->index) {
450 f->pixelformat = cal_formats[i].fourcc;
451 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
452 return 0;
453 }
454
455 idx++;
456 }
457
458 return -EINVAL;
459 }
460
cal_mc_try_fmt(struct cal_ctx * ctx,struct v4l2_format * f,const struct cal_format_info ** info)461 static void cal_mc_try_fmt(struct cal_ctx *ctx, struct v4l2_format *f,
462 const struct cal_format_info **info)
463 {
464 struct v4l2_pix_format *format = &f->fmt.pix;
465 const struct cal_format_info *fmtinfo;
466 unsigned int bpp;
467
468 /*
469 * Default to the first format if the requested pixel format code isn't
470 * supported.
471 */
472 fmtinfo = cal_format_by_fourcc(f->fmt.pix.pixelformat);
473 if (!fmtinfo)
474 fmtinfo = &cal_formats[0];
475
476 /*
477 * Clamp the size, update the pixel format. The field and colorspace are
478 * accepted as-is, except for V4L2_FIELD_ANY that is turned into
479 * V4L2_FIELD_NONE.
480 */
481 bpp = ALIGN(fmtinfo->bpp, 8);
482
483 format->width = clamp_t(unsigned int, format->width,
484 CAL_MIN_WIDTH_BYTES * 8 / bpp,
485 CAL_MAX_WIDTH_BYTES * 8 / bpp);
486 format->height = clamp_t(unsigned int, format->height,
487 CAL_MIN_HEIGHT_LINES, CAL_MAX_HEIGHT_LINES);
488 format->pixelformat = fmtinfo->fourcc;
489
490 if (format->field == V4L2_FIELD_ANY)
491 format->field = V4L2_FIELD_NONE;
492
493 /*
494 * Calculate the number of bytes per line and the image size. The
495 * hardware stores the stride as a number of 16 bytes words, in a
496 * signed 15-bit value. Only 14 bits are thus usable.
497 */
498 format->bytesperline = ALIGN(clamp(format->bytesperline,
499 format->width * bpp / 8,
500 ((1U << 14) - 1) * 16), 16);
501
502 format->sizeimage = format->height * format->bytesperline;
503
504 format->colorspace = ctx->v_fmt.fmt.pix.colorspace;
505
506 if (info)
507 *info = fmtinfo;
508
509 ctx_dbg(3, ctx, "%s: %s %ux%u (bytesperline %u sizeimage %u)\n",
510 __func__, fourcc_to_str(format->pixelformat),
511 format->width, format->height,
512 format->bytesperline, format->sizeimage);
513 }
514
cal_mc_try_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)515 static int cal_mc_try_fmt_vid_cap(struct file *file, void *priv,
516 struct v4l2_format *f)
517 {
518 struct cal_ctx *ctx = video_drvdata(file);
519
520 cal_mc_try_fmt(ctx, f, NULL);
521 return 0;
522 }
523
cal_mc_s_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)524 static int cal_mc_s_fmt_vid_cap(struct file *file, void *priv,
525 struct v4l2_format *f)
526 {
527 struct cal_ctx *ctx = video_drvdata(file);
528 const struct cal_format_info *fmtinfo;
529
530 if (vb2_is_busy(&ctx->vb_vidq)) {
531 ctx_dbg(3, ctx, "%s device busy\n", __func__);
532 return -EBUSY;
533 }
534
535 cal_mc_try_fmt(ctx, f, &fmtinfo);
536
537 ctx->v_fmt = *f;
538 ctx->fmtinfo = fmtinfo;
539
540 return 0;
541 }
542
cal_mc_enum_framesizes(struct file * file,void * fh,struct v4l2_frmsizeenum * fsize)543 static int cal_mc_enum_framesizes(struct file *file, void *fh,
544 struct v4l2_frmsizeenum *fsize)
545 {
546 struct cal_ctx *ctx = video_drvdata(file);
547 const struct cal_format_info *fmtinfo;
548 unsigned int bpp;
549
550 if (fsize->index > 0)
551 return -EINVAL;
552
553 fmtinfo = cal_format_by_fourcc(fsize->pixel_format);
554 if (!fmtinfo) {
555 ctx_dbg(3, ctx, "Invalid pixel format 0x%08x\n",
556 fsize->pixel_format);
557 return -EINVAL;
558 }
559
560 bpp = ALIGN(fmtinfo->bpp, 8);
561
562 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
563 fsize->stepwise.min_width = CAL_MIN_WIDTH_BYTES * 8 / bpp;
564 fsize->stepwise.max_width = CAL_MAX_WIDTH_BYTES * 8 / bpp;
565 fsize->stepwise.step_width = 64 / bpp;
566 fsize->stepwise.min_height = CAL_MIN_HEIGHT_LINES;
567 fsize->stepwise.max_height = CAL_MAX_HEIGHT_LINES;
568 fsize->stepwise.step_height = 1;
569
570 return 0;
571 }
572
573 static const struct v4l2_ioctl_ops cal_ioctl_mc_ops = {
574 .vidioc_querycap = cal_querycap,
575 .vidioc_enum_fmt_vid_cap = cal_mc_enum_fmt_vid_cap,
576 .vidioc_g_fmt_vid_cap = cal_g_fmt_vid_cap,
577 .vidioc_try_fmt_vid_cap = cal_mc_try_fmt_vid_cap,
578 .vidioc_s_fmt_vid_cap = cal_mc_s_fmt_vid_cap,
579 .vidioc_enum_framesizes = cal_mc_enum_framesizes,
580 .vidioc_reqbufs = vb2_ioctl_reqbufs,
581 .vidioc_create_bufs = vb2_ioctl_create_bufs,
582 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
583 .vidioc_querybuf = vb2_ioctl_querybuf,
584 .vidioc_qbuf = vb2_ioctl_qbuf,
585 .vidioc_dqbuf = vb2_ioctl_dqbuf,
586 .vidioc_expbuf = vb2_ioctl_expbuf,
587 .vidioc_streamon = vb2_ioctl_streamon,
588 .vidioc_streamoff = vb2_ioctl_streamoff,
589 .vidioc_log_status = v4l2_ctrl_log_status,
590 };
591
592 /* ------------------------------------------------------------------
593 * videobuf2 Common Operations
594 * ------------------------------------------------------------------
595 */
596
cal_queue_setup(struct vb2_queue * vq,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])597 static int cal_queue_setup(struct vb2_queue *vq,
598 unsigned int *nbuffers, unsigned int *nplanes,
599 unsigned int sizes[], struct device *alloc_devs[])
600 {
601 struct cal_ctx *ctx = vb2_get_drv_priv(vq);
602 unsigned int size = ctx->v_fmt.fmt.pix.sizeimage;
603
604 if (vq->num_buffers + *nbuffers < 3)
605 *nbuffers = 3 - vq->num_buffers;
606
607 if (*nplanes) {
608 if (sizes[0] < size)
609 return -EINVAL;
610 size = sizes[0];
611 }
612
613 *nplanes = 1;
614 sizes[0] = size;
615
616 ctx_dbg(3, ctx, "nbuffers=%d, size=%d\n", *nbuffers, sizes[0]);
617
618 return 0;
619 }
620
cal_buffer_prepare(struct vb2_buffer * vb)621 static int cal_buffer_prepare(struct vb2_buffer *vb)
622 {
623 struct cal_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
624 struct cal_buffer *buf = container_of(vb, struct cal_buffer,
625 vb.vb2_buf);
626 unsigned long size;
627
628 size = ctx->v_fmt.fmt.pix.sizeimage;
629 if (vb2_plane_size(vb, 0) < size) {
630 ctx_err(ctx,
631 "data will not fit into plane (%lu < %lu)\n",
632 vb2_plane_size(vb, 0), size);
633 return -EINVAL;
634 }
635
636 vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size);
637 return 0;
638 }
639
cal_buffer_queue(struct vb2_buffer * vb)640 static void cal_buffer_queue(struct vb2_buffer *vb)
641 {
642 struct cal_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
643 struct cal_buffer *buf = container_of(vb, struct cal_buffer,
644 vb.vb2_buf);
645 unsigned long flags;
646
647 /* recheck locking */
648 spin_lock_irqsave(&ctx->dma.lock, flags);
649 list_add_tail(&buf->list, &ctx->dma.queue);
650 spin_unlock_irqrestore(&ctx->dma.lock, flags);
651 }
652
cal_release_buffers(struct cal_ctx * ctx,enum vb2_buffer_state state)653 static void cal_release_buffers(struct cal_ctx *ctx,
654 enum vb2_buffer_state state)
655 {
656 struct cal_buffer *buf, *tmp;
657
658 /* Release all queued buffers. */
659 spin_lock_irq(&ctx->dma.lock);
660
661 list_for_each_entry_safe(buf, tmp, &ctx->dma.queue, list) {
662 list_del(&buf->list);
663 vb2_buffer_done(&buf->vb.vb2_buf, state);
664 }
665
666 if (ctx->dma.pending) {
667 vb2_buffer_done(&ctx->dma.pending->vb.vb2_buf, state);
668 ctx->dma.pending = NULL;
669 }
670
671 if (ctx->dma.active) {
672 vb2_buffer_done(&ctx->dma.active->vb.vb2_buf, state);
673 ctx->dma.active = NULL;
674 }
675
676 spin_unlock_irq(&ctx->dma.lock);
677 }
678
679 /* ------------------------------------------------------------------
680 * videobuf2 Operations
681 * ------------------------------------------------------------------
682 */
683
cal_video_check_format(struct cal_ctx * ctx)684 static int cal_video_check_format(struct cal_ctx *ctx)
685 {
686 const struct v4l2_mbus_framefmt *format;
687 struct media_pad *remote_pad;
688
689 remote_pad = media_pad_remote_pad_first(&ctx->pad);
690 if (!remote_pad)
691 return -ENODEV;
692
693 format = &ctx->phy->formats[remote_pad->index];
694
695 if (ctx->fmtinfo->code != format->code ||
696 ctx->v_fmt.fmt.pix.height != format->height ||
697 ctx->v_fmt.fmt.pix.width != format->width ||
698 ctx->v_fmt.fmt.pix.field != format->field)
699 return -EPIPE;
700
701 return 0;
702 }
703
cal_start_streaming(struct vb2_queue * vq,unsigned int count)704 static int cal_start_streaming(struct vb2_queue *vq, unsigned int count)
705 {
706 struct cal_ctx *ctx = vb2_get_drv_priv(vq);
707 struct cal_buffer *buf;
708 dma_addr_t addr;
709 int ret;
710
711 ret = video_device_pipeline_alloc_start(&ctx->vdev);
712 if (ret < 0) {
713 ctx_err(ctx, "Failed to start media pipeline: %d\n", ret);
714 goto error_release_buffers;
715 }
716
717 /*
718 * Verify that the currently configured format matches the output of
719 * the connected CAMERARX.
720 */
721 ret = cal_video_check_format(ctx);
722 if (ret < 0) {
723 ctx_dbg(3, ctx,
724 "Format mismatch between CAMERARX and video node\n");
725 goto error_pipeline;
726 }
727
728 ret = cal_ctx_prepare(ctx);
729 if (ret) {
730 ctx_err(ctx, "Failed to prepare context: %d\n", ret);
731 goto error_pipeline;
732 }
733
734 spin_lock_irq(&ctx->dma.lock);
735 buf = list_first_entry(&ctx->dma.queue, struct cal_buffer, list);
736 ctx->dma.active = buf;
737 list_del(&buf->list);
738 spin_unlock_irq(&ctx->dma.lock);
739
740 addr = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0);
741
742 ret = pm_runtime_resume_and_get(ctx->cal->dev);
743 if (ret < 0)
744 goto error_pipeline;
745
746 cal_ctx_set_dma_addr(ctx, addr);
747 cal_ctx_start(ctx);
748
749 ret = v4l2_subdev_call(&ctx->phy->subdev, video, s_stream, 1);
750 if (ret)
751 goto error_stop;
752
753 if (cal_debug >= 4)
754 cal_quickdump_regs(ctx->cal);
755
756 return 0;
757
758 error_stop:
759 cal_ctx_stop(ctx);
760 pm_runtime_put_sync(ctx->cal->dev);
761 cal_ctx_unprepare(ctx);
762
763 error_pipeline:
764 video_device_pipeline_stop(&ctx->vdev);
765 error_release_buffers:
766 cal_release_buffers(ctx, VB2_BUF_STATE_QUEUED);
767
768 return ret;
769 }
770
cal_stop_streaming(struct vb2_queue * vq)771 static void cal_stop_streaming(struct vb2_queue *vq)
772 {
773 struct cal_ctx *ctx = vb2_get_drv_priv(vq);
774
775 cal_ctx_stop(ctx);
776
777 v4l2_subdev_call(&ctx->phy->subdev, video, s_stream, 0);
778
779 pm_runtime_put_sync(ctx->cal->dev);
780
781 cal_ctx_unprepare(ctx);
782
783 cal_release_buffers(ctx, VB2_BUF_STATE_ERROR);
784
785 video_device_pipeline_stop(&ctx->vdev);
786 }
787
788 static const struct vb2_ops cal_video_qops = {
789 .queue_setup = cal_queue_setup,
790 .buf_prepare = cal_buffer_prepare,
791 .buf_queue = cal_buffer_queue,
792 .start_streaming = cal_start_streaming,
793 .stop_streaming = cal_stop_streaming,
794 .wait_prepare = vb2_ops_wait_prepare,
795 .wait_finish = vb2_ops_wait_finish,
796 };
797
798 /* ------------------------------------------------------------------
799 * V4L2 Initialization and Registration
800 * ------------------------------------------------------------------
801 */
802
803 static const struct v4l2_file_operations cal_fops = {
804 .owner = THIS_MODULE,
805 .open = v4l2_fh_open,
806 .release = vb2_fop_release,
807 .poll = vb2_fop_poll,
808 .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
809 .mmap = vb2_fop_mmap,
810 };
811
cal_ctx_v4l2_init_formats(struct cal_ctx * ctx)812 static int cal_ctx_v4l2_init_formats(struct cal_ctx *ctx)
813 {
814 struct v4l2_subdev_mbus_code_enum mbus_code;
815 struct v4l2_mbus_framefmt mbus_fmt;
816 const struct cal_format_info *fmtinfo;
817 unsigned int i, j, k;
818 int ret = 0;
819
820 /* Enumerate sub device formats and enable all matching local formats */
821 ctx->active_fmt = devm_kcalloc(ctx->cal->dev, cal_num_formats,
822 sizeof(*ctx->active_fmt), GFP_KERNEL);
823 if (!ctx->active_fmt)
824 return -ENOMEM;
825
826 ctx->num_active_fmt = 0;
827
828 for (j = 0, i = 0; ; ++j) {
829
830 memset(&mbus_code, 0, sizeof(mbus_code));
831 mbus_code.index = j;
832 mbus_code.which = V4L2_SUBDEV_FORMAT_ACTIVE;
833 ret = v4l2_subdev_call(ctx->phy->source, pad, enum_mbus_code,
834 NULL, &mbus_code);
835 if (ret == -EINVAL)
836 break;
837
838 if (ret) {
839 ctx_err(ctx, "Error enumerating mbus codes in subdev %s: %d\n",
840 ctx->phy->source->name, ret);
841 return ret;
842 }
843
844 ctx_dbg(2, ctx,
845 "subdev %s: code: %04x idx: %u\n",
846 ctx->phy->source->name, mbus_code.code, j);
847
848 for (k = 0; k < cal_num_formats; k++) {
849 fmtinfo = &cal_formats[k];
850
851 if (mbus_code.code == fmtinfo->code) {
852 ctx->active_fmt[i] = fmtinfo;
853 ctx_dbg(2, ctx,
854 "matched fourcc: %s: code: %04x idx: %u\n",
855 fourcc_to_str(fmtinfo->fourcc),
856 fmtinfo->code, i);
857 ctx->num_active_fmt = ++i;
858 }
859 }
860 }
861
862 if (i == 0) {
863 ctx_err(ctx, "No suitable format reported by subdev %s\n",
864 ctx->phy->source->name);
865 return -EINVAL;
866 }
867
868 ret = __subdev_get_format(ctx, &mbus_fmt);
869 if (ret)
870 return ret;
871
872 fmtinfo = find_format_by_code(ctx, mbus_fmt.code);
873 if (!fmtinfo) {
874 ctx_dbg(3, ctx, "mbus code format (0x%08x) not found.\n",
875 mbus_fmt.code);
876 return -EINVAL;
877 }
878
879 /* Save current format */
880 v4l2_fill_pix_format(&ctx->v_fmt.fmt.pix, &mbus_fmt);
881 ctx->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
882 ctx->v_fmt.fmt.pix.pixelformat = fmtinfo->fourcc;
883 cal_calc_format_size(ctx, fmtinfo, &ctx->v_fmt);
884 ctx->fmtinfo = fmtinfo;
885
886 return 0;
887 }
888
cal_ctx_v4l2_init_mc_format(struct cal_ctx * ctx)889 static int cal_ctx_v4l2_init_mc_format(struct cal_ctx *ctx)
890 {
891 const struct cal_format_info *fmtinfo;
892 struct v4l2_pix_format *pix_fmt = &ctx->v_fmt.fmt.pix;
893
894 fmtinfo = cal_format_by_code(MEDIA_BUS_FMT_UYVY8_2X8);
895 if (!fmtinfo)
896 return -EINVAL;
897
898 pix_fmt->width = 640;
899 pix_fmt->height = 480;
900 pix_fmt->field = V4L2_FIELD_NONE;
901 pix_fmt->colorspace = V4L2_COLORSPACE_SRGB;
902 pix_fmt->ycbcr_enc = V4L2_YCBCR_ENC_601;
903 pix_fmt->quantization = V4L2_QUANTIZATION_LIM_RANGE;
904 pix_fmt->xfer_func = V4L2_XFER_FUNC_SRGB;
905 pix_fmt->pixelformat = fmtinfo->fourcc;
906
907 ctx->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
908
909 /* Save current format */
910 cal_calc_format_size(ctx, fmtinfo, &ctx->v_fmt);
911 ctx->fmtinfo = fmtinfo;
912
913 return 0;
914 }
915
cal_ctx_v4l2_register(struct cal_ctx * ctx)916 int cal_ctx_v4l2_register(struct cal_ctx *ctx)
917 {
918 struct video_device *vfd = &ctx->vdev;
919 int ret;
920
921 if (!cal_mc_api) {
922 struct v4l2_ctrl_handler *hdl = &ctx->ctrl_handler;
923
924 ret = cal_ctx_v4l2_init_formats(ctx);
925 if (ret) {
926 ctx_err(ctx, "Failed to init formats: %d\n", ret);
927 return ret;
928 }
929
930 ret = v4l2_ctrl_add_handler(hdl, ctx->phy->source->ctrl_handler,
931 NULL, true);
932 if (ret < 0) {
933 ctx_err(ctx, "Failed to add source ctrl handler\n");
934 return ret;
935 }
936 } else {
937 ret = cal_ctx_v4l2_init_mc_format(ctx);
938 if (ret) {
939 ctx_err(ctx, "Failed to init format: %d\n", ret);
940 return ret;
941 }
942 }
943
944 ret = video_register_device(vfd, VFL_TYPE_VIDEO, cal_video_nr);
945 if (ret < 0) {
946 ctx_err(ctx, "Failed to register video device\n");
947 return ret;
948 }
949
950 ret = media_create_pad_link(&ctx->phy->subdev.entity,
951 CAL_CAMERARX_PAD_FIRST_SOURCE,
952 &vfd->entity, 0,
953 MEDIA_LNK_FL_IMMUTABLE |
954 MEDIA_LNK_FL_ENABLED);
955 if (ret) {
956 ctx_err(ctx, "Failed to create media link for context %u\n",
957 ctx->dma_ctx);
958 video_unregister_device(vfd);
959 return ret;
960 }
961
962 ctx_info(ctx, "V4L2 device registered as %s\n",
963 video_device_node_name(vfd));
964
965 return 0;
966 }
967
cal_ctx_v4l2_unregister(struct cal_ctx * ctx)968 void cal_ctx_v4l2_unregister(struct cal_ctx *ctx)
969 {
970 ctx_dbg(1, ctx, "unregistering %s\n",
971 video_device_node_name(&ctx->vdev));
972
973 video_unregister_device(&ctx->vdev);
974 }
975
cal_ctx_v4l2_init(struct cal_ctx * ctx)976 int cal_ctx_v4l2_init(struct cal_ctx *ctx)
977 {
978 struct video_device *vfd = &ctx->vdev;
979 struct vb2_queue *q = &ctx->vb_vidq;
980 int ret;
981
982 INIT_LIST_HEAD(&ctx->dma.queue);
983 spin_lock_init(&ctx->dma.lock);
984 mutex_init(&ctx->mutex);
985 init_waitqueue_head(&ctx->dma.wait);
986
987 /* Initialize the vb2 queue. */
988 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
989 q->io_modes = VB2_MMAP | VB2_DMABUF;
990 q->drv_priv = ctx;
991 q->buf_struct_size = sizeof(struct cal_buffer);
992 q->ops = &cal_video_qops;
993 q->mem_ops = &vb2_dma_contig_memops;
994 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
995 q->lock = &ctx->mutex;
996 q->min_buffers_needed = 3;
997 q->dev = ctx->cal->dev;
998
999 ret = vb2_queue_init(q);
1000 if (ret)
1001 return ret;
1002
1003 /* Initialize the video device and media entity. */
1004 vfd->fops = &cal_fops;
1005 vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING
1006 | (cal_mc_api ? V4L2_CAP_IO_MC : 0);
1007 vfd->v4l2_dev = &ctx->cal->v4l2_dev;
1008 vfd->queue = q;
1009 snprintf(vfd->name, sizeof(vfd->name), "CAL output %u", ctx->dma_ctx);
1010 vfd->release = video_device_release_empty;
1011 vfd->ioctl_ops = cal_mc_api ? &cal_ioctl_mc_ops : &cal_ioctl_legacy_ops;
1012 vfd->lock = &ctx->mutex;
1013 video_set_drvdata(vfd, ctx);
1014
1015 ctx->pad.flags = MEDIA_PAD_FL_SINK;
1016 ret = media_entity_pads_init(&vfd->entity, 1, &ctx->pad);
1017 if (ret < 0)
1018 return ret;
1019
1020 if (!cal_mc_api) {
1021 /* Initialize the control handler. */
1022 struct v4l2_ctrl_handler *hdl = &ctx->ctrl_handler;
1023
1024 ret = v4l2_ctrl_handler_init(hdl, 11);
1025 if (ret < 0) {
1026 ctx_err(ctx, "Failed to init ctrl handler\n");
1027 goto error;
1028 }
1029
1030 vfd->ctrl_handler = hdl;
1031 }
1032
1033 return 0;
1034
1035 error:
1036 media_entity_cleanup(&vfd->entity);
1037 return ret;
1038 }
1039
cal_ctx_v4l2_cleanup(struct cal_ctx * ctx)1040 void cal_ctx_v4l2_cleanup(struct cal_ctx *ctx)
1041 {
1042 if (!cal_mc_api)
1043 v4l2_ctrl_handler_free(&ctx->ctrl_handler);
1044
1045 media_entity_cleanup(&ctx->vdev.entity);
1046 }
1047