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 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
122 .pad = 0,
123 };
124 struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format;
125 int ret;
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 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
144 .pad = 0,
145 };
146 struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format;
147 int ret;
148
149 *mbus_fmt = *fmt;
150
151 ret = v4l2_subdev_call(ctx->phy->source, pad, set_fmt, NULL, &sd_fmt);
152 if (ret)
153 return ret;
154
155 ctx_dbg(1, ctx, "%s %dx%d code:%04X\n", __func__,
156 fmt->width, fmt->height, fmt->code);
157
158 return 0;
159 }
160
cal_calc_format_size(struct cal_ctx * ctx,const struct cal_format_info * fmtinfo,struct v4l2_format * f)161 static void cal_calc_format_size(struct cal_ctx *ctx,
162 const struct cal_format_info *fmtinfo,
163 struct v4l2_format *f)
164 {
165 u32 bpl, max_width;
166
167 /*
168 * Maximum width is bound by the DMA max width in bytes.
169 * We need to recalculate the actual maxi width depending on the
170 * number of bytes per pixels required.
171 */
172 max_width = CAL_MAX_WIDTH_BYTES / (ALIGN(fmtinfo->bpp, 8) >> 3);
173 v4l_bound_align_image(&f->fmt.pix.width, 48, max_width, 2,
174 &f->fmt.pix.height, 32, CAL_MAX_HEIGHT_LINES,
175 0, 0);
176
177 bpl = (f->fmt.pix.width * ALIGN(fmtinfo->bpp, 8)) >> 3;
178 f->fmt.pix.bytesperline = ALIGN(bpl, 16);
179
180 f->fmt.pix.sizeimage = f->fmt.pix.height *
181 f->fmt.pix.bytesperline;
182
183 ctx_dbg(3, ctx, "%s: fourcc: %s size: %dx%d bpl:%d img_size:%d\n",
184 __func__, fourcc_to_str(f->fmt.pix.pixelformat),
185 f->fmt.pix.width, f->fmt.pix.height,
186 f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
187 }
188
cal_legacy_try_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)189 static int cal_legacy_try_fmt_vid_cap(struct file *file, void *priv,
190 struct v4l2_format *f)
191 {
192 struct cal_ctx *ctx = video_drvdata(file);
193 const struct cal_format_info *fmtinfo;
194 struct v4l2_subdev_frame_size_enum fse = {
195 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
196 };
197 int found;
198
199 fmtinfo = find_format_by_pix(ctx, f->fmt.pix.pixelformat);
200 if (!fmtinfo) {
201 ctx_dbg(3, ctx, "Fourcc format (0x%08x) not found.\n",
202 f->fmt.pix.pixelformat);
203
204 /* Just get the first one enumerated */
205 fmtinfo = ctx->active_fmt[0];
206 f->fmt.pix.pixelformat = fmtinfo->fourcc;
207 }
208
209 f->fmt.pix.field = ctx->v_fmt.fmt.pix.field;
210
211 /* check for/find a valid width/height */
212 found = false;
213 fse.pad = 0;
214 fse.code = fmtinfo->code;
215 for (fse.index = 0; ; fse.index++) {
216 int ret;
217
218 ret = v4l2_subdev_call(ctx->phy->source, pad, enum_frame_size,
219 NULL, &fse);
220 if (ret)
221 break;
222
223 if ((f->fmt.pix.width == fse.max_width) &&
224 (f->fmt.pix.height == fse.max_height)) {
225 found = true;
226 break;
227 } else if ((f->fmt.pix.width >= fse.min_width) &&
228 (f->fmt.pix.width <= fse.max_width) &&
229 (f->fmt.pix.height >= fse.min_height) &&
230 (f->fmt.pix.height <= fse.max_height)) {
231 found = true;
232 break;
233 }
234 }
235
236 if (!found) {
237 /* use existing values as default */
238 f->fmt.pix.width = ctx->v_fmt.fmt.pix.width;
239 f->fmt.pix.height = ctx->v_fmt.fmt.pix.height;
240 }
241
242 /*
243 * Use current colorspace for now, it will get
244 * updated properly during s_fmt
245 */
246 f->fmt.pix.colorspace = ctx->v_fmt.fmt.pix.colorspace;
247 cal_calc_format_size(ctx, fmtinfo, f);
248 return 0;
249 }
250
cal_legacy_s_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)251 static int cal_legacy_s_fmt_vid_cap(struct file *file, void *priv,
252 struct v4l2_format *f)
253 {
254 struct cal_ctx *ctx = video_drvdata(file);
255 struct vb2_queue *q = &ctx->vb_vidq;
256 struct v4l2_subdev_format sd_fmt = {
257 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
258 .pad = CAL_CAMERARX_PAD_SINK,
259 };
260 const struct cal_format_info *fmtinfo;
261 int ret;
262
263 if (vb2_is_busy(q)) {
264 ctx_dbg(3, ctx, "%s device busy\n", __func__);
265 return -EBUSY;
266 }
267
268 ret = cal_legacy_try_fmt_vid_cap(file, priv, f);
269 if (ret < 0)
270 return ret;
271
272 fmtinfo = find_format_by_pix(ctx, f->fmt.pix.pixelformat);
273
274 v4l2_fill_mbus_format(&sd_fmt.format, &f->fmt.pix, fmtinfo->code);
275
276 ret = __subdev_set_format(ctx, &sd_fmt.format);
277 if (ret)
278 return ret;
279
280 /* Just double check nothing has gone wrong */
281 if (sd_fmt.format.code != fmtinfo->code) {
282 ctx_dbg(3, ctx,
283 "%s subdev changed format on us, this should not happen\n",
284 __func__);
285 return -EINVAL;
286 }
287
288 v4l2_fill_pix_format(&ctx->v_fmt.fmt.pix, &sd_fmt.format);
289 ctx->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
290 ctx->v_fmt.fmt.pix.pixelformat = fmtinfo->fourcc;
291 ctx->v_fmt.fmt.pix.field = sd_fmt.format.field;
292 cal_calc_format_size(ctx, fmtinfo, &ctx->v_fmt);
293
294 v4l2_subdev_call(&ctx->phy->subdev, pad, set_fmt, NULL, &sd_fmt);
295
296 ctx->fmtinfo = fmtinfo;
297 *f = ctx->v_fmt;
298
299 return 0;
300 }
301
cal_legacy_enum_framesizes(struct file * file,void * fh,struct v4l2_frmsizeenum * fsize)302 static int cal_legacy_enum_framesizes(struct file *file, void *fh,
303 struct v4l2_frmsizeenum *fsize)
304 {
305 struct cal_ctx *ctx = video_drvdata(file);
306 const struct cal_format_info *fmtinfo;
307 struct v4l2_subdev_frame_size_enum fse = {
308 .index = fsize->index,
309 .pad = 0,
310 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
311 };
312 int ret;
313
314 /* check for valid format */
315 fmtinfo = find_format_by_pix(ctx, fsize->pixel_format);
316 if (!fmtinfo) {
317 ctx_dbg(3, ctx, "Invalid pixel code: %x\n",
318 fsize->pixel_format);
319 return -EINVAL;
320 }
321
322 fse.code = fmtinfo->code;
323
324 ret = v4l2_subdev_call(ctx->phy->source, pad, enum_frame_size, NULL,
325 &fse);
326 if (ret)
327 return ret;
328
329 ctx_dbg(1, ctx, "%s: index: %d code: %x W:[%d,%d] H:[%d,%d]\n",
330 __func__, fse.index, fse.code, fse.min_width, fse.max_width,
331 fse.min_height, fse.max_height);
332
333 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
334 fsize->discrete.width = fse.max_width;
335 fsize->discrete.height = fse.max_height;
336
337 return 0;
338 }
339
cal_legacy_enum_input(struct file * file,void * priv,struct v4l2_input * inp)340 static int cal_legacy_enum_input(struct file *file, void *priv,
341 struct v4l2_input *inp)
342 {
343 if (inp->index > 0)
344 return -EINVAL;
345
346 inp->type = V4L2_INPUT_TYPE_CAMERA;
347 sprintf(inp->name, "Camera %u", inp->index);
348 return 0;
349 }
350
cal_legacy_g_input(struct file * file,void * priv,unsigned int * i)351 static int cal_legacy_g_input(struct file *file, void *priv, unsigned int *i)
352 {
353 *i = 0;
354 return 0;
355 }
356
cal_legacy_s_input(struct file * file,void * priv,unsigned int i)357 static int cal_legacy_s_input(struct file *file, void *priv, unsigned int i)
358 {
359 return i > 0 ? -EINVAL : 0;
360 }
361
362 /* timeperframe is arbitrary and continuous */
cal_legacy_enum_frameintervals(struct file * file,void * priv,struct v4l2_frmivalenum * fival)363 static int cal_legacy_enum_frameintervals(struct file *file, void *priv,
364 struct v4l2_frmivalenum *fival)
365 {
366 struct cal_ctx *ctx = video_drvdata(file);
367 const struct cal_format_info *fmtinfo;
368 struct v4l2_subdev_frame_interval_enum fie = {
369 .index = fival->index,
370 .width = fival->width,
371 .height = fival->height,
372 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
373 };
374 int ret;
375
376 fmtinfo = find_format_by_pix(ctx, fival->pixel_format);
377 if (!fmtinfo)
378 return -EINVAL;
379
380 fie.code = fmtinfo->code;
381 ret = v4l2_subdev_call(ctx->phy->source, pad, enum_frame_interval,
382 NULL, &fie);
383 if (ret)
384 return ret;
385 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
386 fival->discrete = fie.interval;
387
388 return 0;
389 }
390
cal_legacy_g_parm(struct file * file,void * fh,struct v4l2_streamparm * a)391 static int cal_legacy_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
392 {
393 struct cal_ctx *ctx = video_drvdata(file);
394
395 return v4l2_g_parm_cap(video_devdata(file), ctx->phy->source, a);
396 }
397
cal_legacy_s_parm(struct file * file,void * fh,struct v4l2_streamparm * a)398 static int cal_legacy_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
399 {
400 struct cal_ctx *ctx = video_drvdata(file);
401
402 return v4l2_s_parm_cap(video_devdata(file), ctx->phy->source, a);
403 }
404
405 static const struct v4l2_ioctl_ops cal_ioctl_legacy_ops = {
406 .vidioc_querycap = cal_querycap,
407 .vidioc_enum_fmt_vid_cap = cal_legacy_enum_fmt_vid_cap,
408 .vidioc_g_fmt_vid_cap = cal_g_fmt_vid_cap,
409 .vidioc_try_fmt_vid_cap = cal_legacy_try_fmt_vid_cap,
410 .vidioc_s_fmt_vid_cap = cal_legacy_s_fmt_vid_cap,
411 .vidioc_enum_framesizes = cal_legacy_enum_framesizes,
412 .vidioc_reqbufs = vb2_ioctl_reqbufs,
413 .vidioc_create_bufs = vb2_ioctl_create_bufs,
414 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
415 .vidioc_querybuf = vb2_ioctl_querybuf,
416 .vidioc_qbuf = vb2_ioctl_qbuf,
417 .vidioc_dqbuf = vb2_ioctl_dqbuf,
418 .vidioc_expbuf = vb2_ioctl_expbuf,
419 .vidioc_enum_input = cal_legacy_enum_input,
420 .vidioc_g_input = cal_legacy_g_input,
421 .vidioc_s_input = cal_legacy_s_input,
422 .vidioc_enum_frameintervals = cal_legacy_enum_frameintervals,
423 .vidioc_streamon = vb2_ioctl_streamon,
424 .vidioc_streamoff = vb2_ioctl_streamoff,
425 .vidioc_log_status = v4l2_ctrl_log_status,
426 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
427 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
428 .vidioc_g_parm = cal_legacy_g_parm,
429 .vidioc_s_parm = cal_legacy_s_parm,
430 };
431
432 /* ------------------------------------------------------------------
433 * V4L2 Media Controller Centric IOCTLs
434 * ------------------------------------------------------------------
435 */
436
cal_mc_enum_fmt_vid_cap(struct file * file,void * priv,struct v4l2_fmtdesc * f)437 static int cal_mc_enum_fmt_vid_cap(struct file *file, void *priv,
438 struct v4l2_fmtdesc *f)
439 {
440 unsigned int i;
441 unsigned int idx;
442
443 if (f->index >= cal_num_formats)
444 return -EINVAL;
445
446 idx = 0;
447
448 for (i = 0; i < cal_num_formats; ++i) {
449 if (f->mbus_code && cal_formats[i].code != f->mbus_code)
450 continue;
451
452 if (idx == f->index) {
453 f->pixelformat = cal_formats[i].fourcc;
454 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
455 return 0;
456 }
457
458 idx++;
459 }
460
461 return -EINVAL;
462 }
463
cal_mc_try_fmt(struct cal_ctx * ctx,struct v4l2_format * f,const struct cal_format_info ** info)464 static void cal_mc_try_fmt(struct cal_ctx *ctx, struct v4l2_format *f,
465 const struct cal_format_info **info)
466 {
467 struct v4l2_pix_format *format = &f->fmt.pix;
468 const struct cal_format_info *fmtinfo;
469 unsigned int bpp;
470
471 /*
472 * Default to the first format if the requested pixel format code isn't
473 * supported.
474 */
475 fmtinfo = cal_format_by_fourcc(f->fmt.pix.pixelformat);
476 if (!fmtinfo)
477 fmtinfo = &cal_formats[0];
478
479 /*
480 * Clamp the size, update the pixel format. The field and colorspace are
481 * accepted as-is, except for V4L2_FIELD_ANY that is turned into
482 * V4L2_FIELD_NONE.
483 */
484 bpp = ALIGN(fmtinfo->bpp, 8);
485
486 format->width = clamp_t(unsigned int, format->width,
487 CAL_MIN_WIDTH_BYTES * 8 / bpp,
488 CAL_MAX_WIDTH_BYTES * 8 / bpp);
489 format->height = clamp_t(unsigned int, format->height,
490 CAL_MIN_HEIGHT_LINES, CAL_MAX_HEIGHT_LINES);
491 format->pixelformat = fmtinfo->fourcc;
492
493 if (format->field == V4L2_FIELD_ANY)
494 format->field = V4L2_FIELD_NONE;
495
496 /*
497 * Calculate the number of bytes per line and the image size. The
498 * hardware stores the stride as a number of 16 bytes words, in a
499 * signed 15-bit value. Only 14 bits are thus usable.
500 */
501 format->bytesperline = ALIGN(clamp(format->bytesperline,
502 format->width * bpp / 8,
503 ((1U << 14) - 1) * 16), 16);
504
505 format->sizeimage = format->height * format->bytesperline;
506
507 format->colorspace = ctx->v_fmt.fmt.pix.colorspace;
508
509 if (info)
510 *info = fmtinfo;
511
512 ctx_dbg(3, ctx, "%s: %s %ux%u (bytesperline %u sizeimage %u)\n",
513 __func__, fourcc_to_str(format->pixelformat),
514 format->width, format->height,
515 format->bytesperline, format->sizeimage);
516 }
517
cal_mc_try_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)518 static int cal_mc_try_fmt_vid_cap(struct file *file, void *priv,
519 struct v4l2_format *f)
520 {
521 struct cal_ctx *ctx = video_drvdata(file);
522
523 cal_mc_try_fmt(ctx, f, NULL);
524 return 0;
525 }
526
cal_mc_s_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)527 static int cal_mc_s_fmt_vid_cap(struct file *file, void *priv,
528 struct v4l2_format *f)
529 {
530 struct cal_ctx *ctx = video_drvdata(file);
531 const struct cal_format_info *fmtinfo;
532
533 if (vb2_is_busy(&ctx->vb_vidq)) {
534 ctx_dbg(3, ctx, "%s device busy\n", __func__);
535 return -EBUSY;
536 }
537
538 cal_mc_try_fmt(ctx, f, &fmtinfo);
539
540 ctx->v_fmt = *f;
541 ctx->fmtinfo = fmtinfo;
542
543 return 0;
544 }
545
cal_mc_enum_framesizes(struct file * file,void * fh,struct v4l2_frmsizeenum * fsize)546 static int cal_mc_enum_framesizes(struct file *file, void *fh,
547 struct v4l2_frmsizeenum *fsize)
548 {
549 struct cal_ctx *ctx = video_drvdata(file);
550 const struct cal_format_info *fmtinfo;
551 unsigned int bpp;
552
553 if (fsize->index > 0)
554 return -EINVAL;
555
556 fmtinfo = cal_format_by_fourcc(fsize->pixel_format);
557 if (!fmtinfo) {
558 ctx_dbg(3, ctx, "Invalid pixel format 0x%08x\n",
559 fsize->pixel_format);
560 return -EINVAL;
561 }
562
563 bpp = ALIGN(fmtinfo->bpp, 8);
564
565 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
566 fsize->stepwise.min_width = CAL_MIN_WIDTH_BYTES * 8 / bpp;
567 fsize->stepwise.max_width = CAL_MAX_WIDTH_BYTES * 8 / bpp;
568 fsize->stepwise.step_width = 64 / bpp;
569 fsize->stepwise.min_height = CAL_MIN_HEIGHT_LINES;
570 fsize->stepwise.max_height = CAL_MAX_HEIGHT_LINES;
571 fsize->stepwise.step_height = 1;
572
573 return 0;
574 }
575
576 static const struct v4l2_ioctl_ops cal_ioctl_mc_ops = {
577 .vidioc_querycap = cal_querycap,
578 .vidioc_enum_fmt_vid_cap = cal_mc_enum_fmt_vid_cap,
579 .vidioc_g_fmt_vid_cap = cal_g_fmt_vid_cap,
580 .vidioc_try_fmt_vid_cap = cal_mc_try_fmt_vid_cap,
581 .vidioc_s_fmt_vid_cap = cal_mc_s_fmt_vid_cap,
582 .vidioc_enum_framesizes = cal_mc_enum_framesizes,
583 .vidioc_reqbufs = vb2_ioctl_reqbufs,
584 .vidioc_create_bufs = vb2_ioctl_create_bufs,
585 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
586 .vidioc_querybuf = vb2_ioctl_querybuf,
587 .vidioc_qbuf = vb2_ioctl_qbuf,
588 .vidioc_dqbuf = vb2_ioctl_dqbuf,
589 .vidioc_expbuf = vb2_ioctl_expbuf,
590 .vidioc_streamon = vb2_ioctl_streamon,
591 .vidioc_streamoff = vb2_ioctl_streamoff,
592 .vidioc_log_status = v4l2_ctrl_log_status,
593 };
594
595 /* ------------------------------------------------------------------
596 * videobuf2 Common Operations
597 * ------------------------------------------------------------------
598 */
599
cal_queue_setup(struct vb2_queue * vq,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])600 static int cal_queue_setup(struct vb2_queue *vq,
601 unsigned int *nbuffers, unsigned int *nplanes,
602 unsigned int sizes[], struct device *alloc_devs[])
603 {
604 struct cal_ctx *ctx = vb2_get_drv_priv(vq);
605 unsigned int size = ctx->v_fmt.fmt.pix.sizeimage;
606
607 if (vq->num_buffers + *nbuffers < 3)
608 *nbuffers = 3 - vq->num_buffers;
609
610 if (*nplanes) {
611 if (sizes[0] < size)
612 return -EINVAL;
613 size = sizes[0];
614 }
615
616 *nplanes = 1;
617 sizes[0] = size;
618
619 ctx_dbg(3, ctx, "nbuffers=%d, size=%d\n", *nbuffers, sizes[0]);
620
621 return 0;
622 }
623
cal_buffer_prepare(struct vb2_buffer * vb)624 static int cal_buffer_prepare(struct vb2_buffer *vb)
625 {
626 struct cal_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
627 struct cal_buffer *buf = container_of(vb, struct cal_buffer,
628 vb.vb2_buf);
629 unsigned long size;
630
631 size = ctx->v_fmt.fmt.pix.sizeimage;
632 if (vb2_plane_size(vb, 0) < size) {
633 ctx_err(ctx,
634 "data will not fit into plane (%lu < %lu)\n",
635 vb2_plane_size(vb, 0), size);
636 return -EINVAL;
637 }
638
639 vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size);
640 return 0;
641 }
642
cal_buffer_queue(struct vb2_buffer * vb)643 static void cal_buffer_queue(struct vb2_buffer *vb)
644 {
645 struct cal_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
646 struct cal_buffer *buf = container_of(vb, struct cal_buffer,
647 vb.vb2_buf);
648 unsigned long flags;
649
650 /* recheck locking */
651 spin_lock_irqsave(&ctx->dma.lock, flags);
652 list_add_tail(&buf->list, &ctx->dma.queue);
653 spin_unlock_irqrestore(&ctx->dma.lock, flags);
654 }
655
cal_release_buffers(struct cal_ctx * ctx,enum vb2_buffer_state state)656 static void cal_release_buffers(struct cal_ctx *ctx,
657 enum vb2_buffer_state state)
658 {
659 struct cal_buffer *buf, *tmp;
660
661 /* Release all queued buffers. */
662 spin_lock_irq(&ctx->dma.lock);
663
664 list_for_each_entry_safe(buf, tmp, &ctx->dma.queue, list) {
665 list_del(&buf->list);
666 vb2_buffer_done(&buf->vb.vb2_buf, state);
667 }
668
669 if (ctx->dma.pending) {
670 vb2_buffer_done(&ctx->dma.pending->vb.vb2_buf, state);
671 ctx->dma.pending = NULL;
672 }
673
674 if (ctx->dma.active) {
675 vb2_buffer_done(&ctx->dma.active->vb.vb2_buf, state);
676 ctx->dma.active = NULL;
677 }
678
679 spin_unlock_irq(&ctx->dma.lock);
680 }
681
682 /* ------------------------------------------------------------------
683 * videobuf2 Operations
684 * ------------------------------------------------------------------
685 */
686
cal_video_check_format(struct cal_ctx * ctx)687 static int cal_video_check_format(struct cal_ctx *ctx)
688 {
689 const struct v4l2_mbus_framefmt *format;
690 struct v4l2_subdev_state *state;
691 struct media_pad *remote_pad;
692 int ret = 0;
693
694 remote_pad = media_pad_remote_pad_first(&ctx->pad);
695 if (!remote_pad)
696 return -ENODEV;
697
698 state = v4l2_subdev_lock_and_get_active_state(&ctx->phy->subdev);
699
700 format = v4l2_subdev_get_pad_format(&ctx->phy->subdev, state, remote_pad->index);
701 if (!format) {
702 ret = -EINVAL;
703 goto out;
704 }
705
706 if (ctx->fmtinfo->code != format->code ||
707 ctx->v_fmt.fmt.pix.height != format->height ||
708 ctx->v_fmt.fmt.pix.width != format->width ||
709 ctx->v_fmt.fmt.pix.field != format->field) {
710 ret = -EPIPE;
711 goto out;
712 }
713
714 out:
715 v4l2_subdev_unlock_state(state);
716
717 return ret;
718 }
719
cal_start_streaming(struct vb2_queue * vq,unsigned int count)720 static int cal_start_streaming(struct vb2_queue *vq, unsigned int count)
721 {
722 struct cal_ctx *ctx = vb2_get_drv_priv(vq);
723 struct cal_buffer *buf;
724 dma_addr_t addr;
725 int ret;
726
727 ret = video_device_pipeline_alloc_start(&ctx->vdev);
728 if (ret < 0) {
729 ctx_err(ctx, "Failed to start media pipeline: %d\n", ret);
730 goto error_release_buffers;
731 }
732
733 /*
734 * Verify that the currently configured format matches the output of
735 * the connected CAMERARX.
736 */
737 ret = cal_video_check_format(ctx);
738 if (ret < 0) {
739 ctx_dbg(3, ctx,
740 "Format mismatch between CAMERARX and video node\n");
741 goto error_pipeline;
742 }
743
744 ret = cal_ctx_prepare(ctx);
745 if (ret) {
746 ctx_err(ctx, "Failed to prepare context: %d\n", ret);
747 goto error_pipeline;
748 }
749
750 spin_lock_irq(&ctx->dma.lock);
751 buf = list_first_entry(&ctx->dma.queue, struct cal_buffer, list);
752 ctx->dma.active = buf;
753 list_del(&buf->list);
754 spin_unlock_irq(&ctx->dma.lock);
755
756 addr = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0);
757
758 ret = pm_runtime_resume_and_get(ctx->cal->dev);
759 if (ret < 0)
760 goto error_pipeline;
761
762 cal_ctx_set_dma_addr(ctx, addr);
763 cal_ctx_start(ctx);
764
765 ret = v4l2_subdev_call(&ctx->phy->subdev, video, s_stream, 1);
766 if (ret)
767 goto error_stop;
768
769 if (cal_debug >= 4)
770 cal_quickdump_regs(ctx->cal);
771
772 return 0;
773
774 error_stop:
775 cal_ctx_stop(ctx);
776 pm_runtime_put_sync(ctx->cal->dev);
777 cal_ctx_unprepare(ctx);
778
779 error_pipeline:
780 video_device_pipeline_stop(&ctx->vdev);
781 error_release_buffers:
782 cal_release_buffers(ctx, VB2_BUF_STATE_QUEUED);
783
784 return ret;
785 }
786
cal_stop_streaming(struct vb2_queue * vq)787 static void cal_stop_streaming(struct vb2_queue *vq)
788 {
789 struct cal_ctx *ctx = vb2_get_drv_priv(vq);
790
791 cal_ctx_stop(ctx);
792
793 v4l2_subdev_call(&ctx->phy->subdev, video, s_stream, 0);
794
795 pm_runtime_put_sync(ctx->cal->dev);
796
797 cal_ctx_unprepare(ctx);
798
799 cal_release_buffers(ctx, VB2_BUF_STATE_ERROR);
800
801 video_device_pipeline_stop(&ctx->vdev);
802 }
803
804 static const struct vb2_ops cal_video_qops = {
805 .queue_setup = cal_queue_setup,
806 .buf_prepare = cal_buffer_prepare,
807 .buf_queue = cal_buffer_queue,
808 .start_streaming = cal_start_streaming,
809 .stop_streaming = cal_stop_streaming,
810 .wait_prepare = vb2_ops_wait_prepare,
811 .wait_finish = vb2_ops_wait_finish,
812 };
813
814 /* ------------------------------------------------------------------
815 * V4L2 Initialization and Registration
816 * ------------------------------------------------------------------
817 */
818
819 static const struct v4l2_file_operations cal_fops = {
820 .owner = THIS_MODULE,
821 .open = v4l2_fh_open,
822 .release = vb2_fop_release,
823 .poll = vb2_fop_poll,
824 .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
825 .mmap = vb2_fop_mmap,
826 };
827
cal_ctx_v4l2_init_formats(struct cal_ctx * ctx)828 static int cal_ctx_v4l2_init_formats(struct cal_ctx *ctx)
829 {
830 struct v4l2_mbus_framefmt mbus_fmt;
831 const struct cal_format_info *fmtinfo;
832 unsigned int i, j, k;
833 int ret = 0;
834
835 /* Enumerate sub device formats and enable all matching local formats */
836 ctx->active_fmt = devm_kcalloc(ctx->cal->dev, cal_num_formats,
837 sizeof(*ctx->active_fmt), GFP_KERNEL);
838 if (!ctx->active_fmt)
839 return -ENOMEM;
840
841 ctx->num_active_fmt = 0;
842
843 for (j = 0, i = 0; ; ++j) {
844 struct v4l2_subdev_mbus_code_enum mbus_code = {
845 .index = j,
846 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
847 };
848
849 ret = v4l2_subdev_call(ctx->phy->source, pad, enum_mbus_code,
850 NULL, &mbus_code);
851 if (ret == -EINVAL)
852 break;
853
854 if (ret) {
855 ctx_err(ctx, "Error enumerating mbus codes in subdev %s: %d\n",
856 ctx->phy->source->name, ret);
857 return ret;
858 }
859
860 ctx_dbg(2, ctx,
861 "subdev %s: code: %04x idx: %u\n",
862 ctx->phy->source->name, mbus_code.code, j);
863
864 for (k = 0; k < cal_num_formats; k++) {
865 fmtinfo = &cal_formats[k];
866
867 if (mbus_code.code == fmtinfo->code) {
868 ctx->active_fmt[i] = fmtinfo;
869 ctx_dbg(2, ctx,
870 "matched fourcc: %s: code: %04x idx: %u\n",
871 fourcc_to_str(fmtinfo->fourcc),
872 fmtinfo->code, i);
873 ctx->num_active_fmt = ++i;
874 }
875 }
876 }
877
878 if (i == 0) {
879 ctx_err(ctx, "No suitable format reported by subdev %s\n",
880 ctx->phy->source->name);
881 return -EINVAL;
882 }
883
884 ret = __subdev_get_format(ctx, &mbus_fmt);
885 if (ret)
886 return ret;
887
888 fmtinfo = find_format_by_code(ctx, mbus_fmt.code);
889 if (!fmtinfo) {
890 ctx_dbg(3, ctx, "mbus code format (0x%08x) not found.\n",
891 mbus_fmt.code);
892 return -EINVAL;
893 }
894
895 /* Save current format */
896 v4l2_fill_pix_format(&ctx->v_fmt.fmt.pix, &mbus_fmt);
897 ctx->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
898 ctx->v_fmt.fmt.pix.pixelformat = fmtinfo->fourcc;
899 cal_calc_format_size(ctx, fmtinfo, &ctx->v_fmt);
900 ctx->fmtinfo = fmtinfo;
901
902 return 0;
903 }
904
cal_ctx_v4l2_init_mc_format(struct cal_ctx * ctx)905 static int cal_ctx_v4l2_init_mc_format(struct cal_ctx *ctx)
906 {
907 const struct cal_format_info *fmtinfo;
908 struct v4l2_pix_format *pix_fmt = &ctx->v_fmt.fmt.pix;
909
910 fmtinfo = cal_format_by_code(MEDIA_BUS_FMT_UYVY8_1X16);
911 if (!fmtinfo)
912 return -EINVAL;
913
914 pix_fmt->width = 640;
915 pix_fmt->height = 480;
916 pix_fmt->field = V4L2_FIELD_NONE;
917 pix_fmt->colorspace = V4L2_COLORSPACE_SRGB;
918 pix_fmt->ycbcr_enc = V4L2_YCBCR_ENC_601;
919 pix_fmt->quantization = V4L2_QUANTIZATION_LIM_RANGE;
920 pix_fmt->xfer_func = V4L2_XFER_FUNC_SRGB;
921 pix_fmt->pixelformat = fmtinfo->fourcc;
922
923 ctx->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
924
925 /* Save current format */
926 cal_calc_format_size(ctx, fmtinfo, &ctx->v_fmt);
927 ctx->fmtinfo = fmtinfo;
928
929 return 0;
930 }
931
cal_ctx_v4l2_register(struct cal_ctx * ctx)932 int cal_ctx_v4l2_register(struct cal_ctx *ctx)
933 {
934 struct video_device *vfd = &ctx->vdev;
935 int ret;
936
937 if (!cal_mc_api) {
938 struct v4l2_ctrl_handler *hdl = &ctx->ctrl_handler;
939
940 ret = cal_ctx_v4l2_init_formats(ctx);
941 if (ret) {
942 ctx_err(ctx, "Failed to init formats: %d\n", ret);
943 return ret;
944 }
945
946 ret = v4l2_ctrl_add_handler(hdl, ctx->phy->source->ctrl_handler,
947 NULL, true);
948 if (ret < 0) {
949 ctx_err(ctx, "Failed to add source ctrl handler\n");
950 return ret;
951 }
952 } else {
953 ret = cal_ctx_v4l2_init_mc_format(ctx);
954 if (ret) {
955 ctx_err(ctx, "Failed to init format: %d\n", ret);
956 return ret;
957 }
958 }
959
960 ret = video_register_device(vfd, VFL_TYPE_VIDEO, cal_video_nr);
961 if (ret < 0) {
962 ctx_err(ctx, "Failed to register video device\n");
963 return ret;
964 }
965
966 ret = media_create_pad_link(&ctx->phy->subdev.entity,
967 CAL_CAMERARX_PAD_FIRST_SOURCE,
968 &vfd->entity, 0,
969 MEDIA_LNK_FL_IMMUTABLE |
970 MEDIA_LNK_FL_ENABLED);
971 if (ret) {
972 ctx_err(ctx, "Failed to create media link for context %u\n",
973 ctx->dma_ctx);
974 video_unregister_device(vfd);
975 return ret;
976 }
977
978 ctx_info(ctx, "V4L2 device registered as %s\n",
979 video_device_node_name(vfd));
980
981 return 0;
982 }
983
cal_ctx_v4l2_unregister(struct cal_ctx * ctx)984 void cal_ctx_v4l2_unregister(struct cal_ctx *ctx)
985 {
986 ctx_dbg(1, ctx, "unregistering %s\n",
987 video_device_node_name(&ctx->vdev));
988
989 video_unregister_device(&ctx->vdev);
990 }
991
cal_ctx_v4l2_init(struct cal_ctx * ctx)992 int cal_ctx_v4l2_init(struct cal_ctx *ctx)
993 {
994 struct video_device *vfd = &ctx->vdev;
995 struct vb2_queue *q = &ctx->vb_vidq;
996 int ret;
997
998 INIT_LIST_HEAD(&ctx->dma.queue);
999 spin_lock_init(&ctx->dma.lock);
1000 mutex_init(&ctx->mutex);
1001 init_waitqueue_head(&ctx->dma.wait);
1002
1003 /* Initialize the vb2 queue. */
1004 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1005 q->io_modes = VB2_MMAP | VB2_DMABUF;
1006 q->drv_priv = ctx;
1007 q->buf_struct_size = sizeof(struct cal_buffer);
1008 q->ops = &cal_video_qops;
1009 q->mem_ops = &vb2_dma_contig_memops;
1010 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1011 q->lock = &ctx->mutex;
1012 q->min_buffers_needed = 3;
1013 q->dev = ctx->cal->dev;
1014
1015 ret = vb2_queue_init(q);
1016 if (ret)
1017 return ret;
1018
1019 /* Initialize the video device and media entity. */
1020 vfd->fops = &cal_fops;
1021 vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING
1022 | (cal_mc_api ? V4L2_CAP_IO_MC : 0);
1023 vfd->v4l2_dev = &ctx->cal->v4l2_dev;
1024 vfd->queue = q;
1025 snprintf(vfd->name, sizeof(vfd->name), "CAL output %u", ctx->dma_ctx);
1026 vfd->release = video_device_release_empty;
1027 vfd->ioctl_ops = cal_mc_api ? &cal_ioctl_mc_ops : &cal_ioctl_legacy_ops;
1028 vfd->lock = &ctx->mutex;
1029 video_set_drvdata(vfd, ctx);
1030
1031 ctx->pad.flags = MEDIA_PAD_FL_SINK;
1032 ret = media_entity_pads_init(&vfd->entity, 1, &ctx->pad);
1033 if (ret < 0)
1034 return ret;
1035
1036 if (!cal_mc_api) {
1037 /* Initialize the control handler. */
1038 struct v4l2_ctrl_handler *hdl = &ctx->ctrl_handler;
1039
1040 ret = v4l2_ctrl_handler_init(hdl, 11);
1041 if (ret < 0) {
1042 ctx_err(ctx, "Failed to init ctrl handler\n");
1043 goto error;
1044 }
1045
1046 vfd->ctrl_handler = hdl;
1047 }
1048
1049 return 0;
1050
1051 error:
1052 media_entity_cleanup(&vfd->entity);
1053 return ret;
1054 }
1055
cal_ctx_v4l2_cleanup(struct cal_ctx * ctx)1056 void cal_ctx_v4l2_cleanup(struct cal_ctx *ctx)
1057 {
1058 if (!cal_mc_api)
1059 v4l2_ctrl_handler_free(&ctx->ctrl_handler);
1060
1061 media_entity_cleanup(&ctx->vdev.entity);
1062 }
1063