1 /*
2 * Samsung TV Mixer driver
3 *
4 * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
5 *
6 * Tomasz Stanislawski, <t.stanislaws@samsung.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published
10 * by the Free Software Foundation. either version 2 of the License,
11 * or (at your option) any later version
12 */
13
14 #include "mixer.h"
15
16 #include <media/v4l2-ioctl.h>
17 #include <linux/videodev2.h>
18 #include <linux/mm.h>
19 #include <linux/module.h>
20 #include <linux/version.h>
21 #include <linux/timer.h>
22 #include <media/videobuf2-dma-contig.h>
23
find_reg_callback(struct device * dev,void * p)24 static int find_reg_callback(struct device *dev, void *p)
25 {
26 struct v4l2_subdev **sd = p;
27
28 *sd = dev_get_drvdata(dev);
29 /* non-zero value stops iteration */
30 return 1;
31 }
32
find_and_register_subdev(struct mxr_device * mdev,char * module_name)33 static struct v4l2_subdev *find_and_register_subdev(
34 struct mxr_device *mdev, char *module_name)
35 {
36 struct device_driver *drv;
37 struct v4l2_subdev *sd = NULL;
38 int ret;
39
40 /* TODO: add waiting until probe is finished */
41 drv = driver_find(module_name, &platform_bus_type);
42 if (!drv) {
43 mxr_warn(mdev, "module %s is missing\n", module_name);
44 return NULL;
45 }
46 /* driver refcnt is increased, it is safe to iterate over devices */
47 ret = driver_for_each_device(drv, NULL, &sd, find_reg_callback);
48 /* ret == 0 means that find_reg_callback was never executed */
49 if (sd == NULL) {
50 mxr_warn(mdev, "module %s provides no subdev!\n", module_name);
51 goto done;
52 }
53 /* v4l2_device_register_subdev detects if sd is NULL */
54 ret = v4l2_device_register_subdev(&mdev->v4l2_dev, sd);
55 if (ret) {
56 mxr_warn(mdev, "failed to register subdev %s\n", sd->name);
57 sd = NULL;
58 }
59
60 done:
61 put_driver(drv);
62 return sd;
63 }
64
mxr_acquire_video(struct mxr_device * mdev,struct mxr_output_conf * output_conf,int output_count)65 int __devinit mxr_acquire_video(struct mxr_device *mdev,
66 struct mxr_output_conf *output_conf, int output_count)
67 {
68 struct device *dev = mdev->dev;
69 struct v4l2_device *v4l2_dev = &mdev->v4l2_dev;
70 int i;
71 int ret = 0;
72 struct v4l2_subdev *sd;
73
74 strlcpy(v4l2_dev->name, dev_name(mdev->dev), sizeof(v4l2_dev->name));
75 /* prepare context for V4L2 device */
76 ret = v4l2_device_register(dev, v4l2_dev);
77 if (ret) {
78 mxr_err(mdev, "could not register v4l2 device.\n");
79 goto fail;
80 }
81
82 mdev->alloc_ctx = vb2_dma_contig_init_ctx(mdev->dev);
83 if (IS_ERR_OR_NULL(mdev->alloc_ctx)) {
84 mxr_err(mdev, "could not acquire vb2 allocator\n");
85 goto fail_v4l2_dev;
86 }
87
88 /* registering outputs */
89 mdev->output_cnt = 0;
90 for (i = 0; i < output_count; ++i) {
91 struct mxr_output_conf *conf = &output_conf[i];
92 struct mxr_output *out;
93
94 sd = find_and_register_subdev(mdev, conf->module_name);
95 /* trying to register next output */
96 if (sd == NULL)
97 continue;
98 out = kzalloc(sizeof *out, GFP_KERNEL);
99 if (out == NULL) {
100 mxr_err(mdev, "no memory for '%s'\n",
101 conf->output_name);
102 ret = -ENOMEM;
103 /* registered subdevs are removed in fail_v4l2_dev */
104 goto fail_output;
105 }
106 strlcpy(out->name, conf->output_name, sizeof(out->name));
107 out->sd = sd;
108 out->cookie = conf->cookie;
109 mdev->output[mdev->output_cnt++] = out;
110 mxr_info(mdev, "added output '%s' from module '%s'\n",
111 conf->output_name, conf->module_name);
112 /* checking if maximal number of outputs is reached */
113 if (mdev->output_cnt >= MXR_MAX_OUTPUTS)
114 break;
115 }
116
117 if (mdev->output_cnt == 0) {
118 mxr_err(mdev, "failed to register any output\n");
119 ret = -ENODEV;
120 /* skipping fail_output because there is nothing to free */
121 goto fail_vb2_allocator;
122 }
123
124 return 0;
125
126 fail_output:
127 /* kfree is NULL-safe */
128 for (i = 0; i < mdev->output_cnt; ++i)
129 kfree(mdev->output[i]);
130 memset(mdev->output, 0, sizeof mdev->output);
131
132 fail_vb2_allocator:
133 /* freeing allocator context */
134 vb2_dma_contig_cleanup_ctx(mdev->alloc_ctx);
135
136 fail_v4l2_dev:
137 /* NOTE: automatically unregister all subdevs */
138 v4l2_device_unregister(v4l2_dev);
139
140 fail:
141 return ret;
142 }
143
mxr_release_video(struct mxr_device * mdev)144 void __devexit mxr_release_video(struct mxr_device *mdev)
145 {
146 int i;
147
148 /* kfree is NULL-safe */
149 for (i = 0; i < mdev->output_cnt; ++i)
150 kfree(mdev->output[i]);
151
152 vb2_dma_contig_cleanup_ctx(mdev->alloc_ctx);
153 v4l2_device_unregister(&mdev->v4l2_dev);
154 }
155
mxr_querycap(struct file * file,void * priv,struct v4l2_capability * cap)156 static int mxr_querycap(struct file *file, void *priv,
157 struct v4l2_capability *cap)
158 {
159 struct mxr_layer *layer = video_drvdata(file);
160
161 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
162
163 strlcpy(cap->driver, MXR_DRIVER_NAME, sizeof cap->driver);
164 strlcpy(cap->card, layer->vfd.name, sizeof cap->card);
165 sprintf(cap->bus_info, "%d", layer->idx);
166 cap->version = KERNEL_VERSION(0, 1, 0);
167 cap->capabilities = V4L2_CAP_STREAMING |
168 V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
169
170 return 0;
171 }
172
mxr_geometry_dump(struct mxr_device * mdev,struct mxr_geometry * geo)173 static void mxr_geometry_dump(struct mxr_device *mdev, struct mxr_geometry *geo)
174 {
175 mxr_dbg(mdev, "src.full_size = (%u, %u)\n",
176 geo->src.full_width, geo->src.full_height);
177 mxr_dbg(mdev, "src.size = (%u, %u)\n",
178 geo->src.width, geo->src.height);
179 mxr_dbg(mdev, "src.offset = (%u, %u)\n",
180 geo->src.x_offset, geo->src.y_offset);
181 mxr_dbg(mdev, "dst.full_size = (%u, %u)\n",
182 geo->dst.full_width, geo->dst.full_height);
183 mxr_dbg(mdev, "dst.size = (%u, %u)\n",
184 geo->dst.width, geo->dst.height);
185 mxr_dbg(mdev, "dst.offset = (%u, %u)\n",
186 geo->dst.x_offset, geo->dst.y_offset);
187 mxr_dbg(mdev, "ratio = (%u, %u)\n",
188 geo->x_ratio, geo->y_ratio);
189 }
190
mxr_layer_default_geo(struct mxr_layer * layer)191 static void mxr_layer_default_geo(struct mxr_layer *layer)
192 {
193 struct mxr_device *mdev = layer->mdev;
194 struct v4l2_mbus_framefmt mbus_fmt;
195
196 memset(&layer->geo, 0, sizeof layer->geo);
197
198 mxr_get_mbus_fmt(mdev, &mbus_fmt);
199
200 layer->geo.dst.full_width = mbus_fmt.width;
201 layer->geo.dst.full_height = mbus_fmt.height;
202 layer->geo.dst.width = layer->geo.dst.full_width;
203 layer->geo.dst.height = layer->geo.dst.full_height;
204 layer->geo.dst.field = mbus_fmt.field;
205
206 layer->geo.src.full_width = mbus_fmt.width;
207 layer->geo.src.full_height = mbus_fmt.height;
208 layer->geo.src.width = layer->geo.src.full_width;
209 layer->geo.src.height = layer->geo.src.full_height;
210
211 mxr_geometry_dump(mdev, &layer->geo);
212 layer->ops.fix_geometry(layer, MXR_GEOMETRY_SINK, 0);
213 mxr_geometry_dump(mdev, &layer->geo);
214 }
215
mxr_layer_update_output(struct mxr_layer * layer)216 static void mxr_layer_update_output(struct mxr_layer *layer)
217 {
218 struct mxr_device *mdev = layer->mdev;
219 struct v4l2_mbus_framefmt mbus_fmt;
220
221 mxr_get_mbus_fmt(mdev, &mbus_fmt);
222 /* checking if update is needed */
223 if (layer->geo.dst.full_width == mbus_fmt.width &&
224 layer->geo.dst.full_height == mbus_fmt.width)
225 return;
226
227 layer->geo.dst.full_width = mbus_fmt.width;
228 layer->geo.dst.full_height = mbus_fmt.height;
229 layer->geo.dst.field = mbus_fmt.field;
230 layer->ops.fix_geometry(layer, MXR_GEOMETRY_SINK, 0);
231
232 mxr_geometry_dump(mdev, &layer->geo);
233 }
234
235 static const struct mxr_format *find_format_by_fourcc(
236 struct mxr_layer *layer, unsigned long fourcc);
237 static const struct mxr_format *find_format_by_index(
238 struct mxr_layer *layer, unsigned long index);
239
mxr_enum_fmt(struct file * file,void * priv,struct v4l2_fmtdesc * f)240 static int mxr_enum_fmt(struct file *file, void *priv,
241 struct v4l2_fmtdesc *f)
242 {
243 struct mxr_layer *layer = video_drvdata(file);
244 struct mxr_device *mdev = layer->mdev;
245 const struct mxr_format *fmt;
246
247 mxr_dbg(mdev, "%s\n", __func__);
248 fmt = find_format_by_index(layer, f->index);
249 if (fmt == NULL)
250 return -EINVAL;
251
252 strlcpy(f->description, fmt->name, sizeof(f->description));
253 f->pixelformat = fmt->fourcc;
254
255 return 0;
256 }
257
divup(unsigned int divident,unsigned int divisor)258 static unsigned int divup(unsigned int divident, unsigned int divisor)
259 {
260 return (divident + divisor - 1) / divisor;
261 }
262
mxr_get_plane_size(const struct mxr_block * blk,unsigned int width,unsigned int height)263 unsigned long mxr_get_plane_size(const struct mxr_block *blk,
264 unsigned int width, unsigned int height)
265 {
266 unsigned int bl_width = divup(width, blk->width);
267 unsigned int bl_height = divup(height, blk->height);
268
269 return bl_width * bl_height * blk->size;
270 }
271
mxr_mplane_fill(struct v4l2_plane_pix_format * planes,const struct mxr_format * fmt,u32 width,u32 height)272 static void mxr_mplane_fill(struct v4l2_plane_pix_format *planes,
273 const struct mxr_format *fmt, u32 width, u32 height)
274 {
275 int i;
276
277 /* checking if nothing to fill */
278 if (!planes)
279 return;
280
281 memset(planes, 0, sizeof(*planes) * fmt->num_subframes);
282 for (i = 0; i < fmt->num_planes; ++i) {
283 struct v4l2_plane_pix_format *plane = planes
284 + fmt->plane2subframe[i];
285 const struct mxr_block *blk = &fmt->plane[i];
286 u32 bl_width = divup(width, blk->width);
287 u32 bl_height = divup(height, blk->height);
288 u32 sizeimage = bl_width * bl_height * blk->size;
289 u16 bytesperline = bl_width * blk->size / blk->height;
290
291 plane->sizeimage += sizeimage;
292 plane->bytesperline = max(plane->bytesperline, bytesperline);
293 }
294 }
295
mxr_g_fmt(struct file * file,void * priv,struct v4l2_format * f)296 static int mxr_g_fmt(struct file *file, void *priv,
297 struct v4l2_format *f)
298 {
299 struct mxr_layer *layer = video_drvdata(file);
300 struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
301
302 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
303
304 pix->width = layer->geo.src.full_width;
305 pix->height = layer->geo.src.full_height;
306 pix->field = V4L2_FIELD_NONE;
307 pix->pixelformat = layer->fmt->fourcc;
308 pix->colorspace = layer->fmt->colorspace;
309 mxr_mplane_fill(pix->plane_fmt, layer->fmt, pix->width, pix->height);
310
311 return 0;
312 }
313
mxr_s_fmt(struct file * file,void * priv,struct v4l2_format * f)314 static int mxr_s_fmt(struct file *file, void *priv,
315 struct v4l2_format *f)
316 {
317 struct mxr_layer *layer = video_drvdata(file);
318 const struct mxr_format *fmt;
319 struct v4l2_pix_format_mplane *pix;
320 struct mxr_device *mdev = layer->mdev;
321 struct mxr_geometry *geo = &layer->geo;
322
323 mxr_dbg(mdev, "%s:%d\n", __func__, __LINE__);
324
325 pix = &f->fmt.pix_mp;
326 fmt = find_format_by_fourcc(layer, pix->pixelformat);
327 if (fmt == NULL) {
328 mxr_warn(mdev, "not recognized fourcc: %08x\n",
329 pix->pixelformat);
330 return -EINVAL;
331 }
332 layer->fmt = fmt;
333 /* set source size to highest accepted value */
334 geo->src.full_width = max(geo->dst.full_width, pix->width);
335 geo->src.full_height = max(geo->dst.full_height, pix->height);
336 layer->ops.fix_geometry(layer, MXR_GEOMETRY_SOURCE, 0);
337 mxr_geometry_dump(mdev, &layer->geo);
338 /* set cropping to total visible screen */
339 geo->src.width = pix->width;
340 geo->src.height = pix->height;
341 geo->src.x_offset = 0;
342 geo->src.y_offset = 0;
343 /* assure consistency of geometry */
344 layer->ops.fix_geometry(layer, MXR_GEOMETRY_CROP, MXR_NO_OFFSET);
345 mxr_geometry_dump(mdev, &layer->geo);
346 /* set full size to lowest possible value */
347 geo->src.full_width = 0;
348 geo->src.full_height = 0;
349 layer->ops.fix_geometry(layer, MXR_GEOMETRY_SOURCE, 0);
350 mxr_geometry_dump(mdev, &layer->geo);
351
352 /* returning results */
353 mxr_g_fmt(file, priv, f);
354
355 return 0;
356 }
357
mxr_g_selection(struct file * file,void * fh,struct v4l2_selection * s)358 static int mxr_g_selection(struct file *file, void *fh,
359 struct v4l2_selection *s)
360 {
361 struct mxr_layer *layer = video_drvdata(file);
362 struct mxr_geometry *geo = &layer->geo;
363
364 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
365
366 if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT &&
367 s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
368 return -EINVAL;
369
370 switch (s->target) {
371 case V4L2_SEL_TGT_CROP_ACTIVE:
372 s->r.left = geo->src.x_offset;
373 s->r.top = geo->src.y_offset;
374 s->r.width = geo->src.width;
375 s->r.height = geo->src.height;
376 break;
377 case V4L2_SEL_TGT_CROP_DEFAULT:
378 case V4L2_SEL_TGT_CROP_BOUNDS:
379 s->r.left = 0;
380 s->r.top = 0;
381 s->r.width = geo->src.full_width;
382 s->r.height = geo->src.full_height;
383 break;
384 case V4L2_SEL_TGT_COMPOSE_ACTIVE:
385 case V4L2_SEL_TGT_COMPOSE_PADDED:
386 s->r.left = geo->dst.x_offset;
387 s->r.top = geo->dst.y_offset;
388 s->r.width = geo->dst.width;
389 s->r.height = geo->dst.height;
390 break;
391 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
392 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
393 s->r.left = 0;
394 s->r.top = 0;
395 s->r.width = geo->dst.full_width;
396 s->r.height = geo->dst.full_height;
397 break;
398 default:
399 return -EINVAL;
400 }
401
402 return 0;
403 }
404
405 /* returns 1 if rectangle 'a' is inside 'b' */
mxr_is_rect_inside(struct v4l2_rect * a,struct v4l2_rect * b)406 static int mxr_is_rect_inside(struct v4l2_rect *a, struct v4l2_rect *b)
407 {
408 if (a->left < b->left)
409 return 0;
410 if (a->top < b->top)
411 return 0;
412 if (a->left + a->width > b->left + b->width)
413 return 0;
414 if (a->top + a->height > b->top + b->height)
415 return 0;
416 return 1;
417 }
418
mxr_s_selection(struct file * file,void * fh,struct v4l2_selection * s)419 static int mxr_s_selection(struct file *file, void *fh,
420 struct v4l2_selection *s)
421 {
422 struct mxr_layer *layer = video_drvdata(file);
423 struct mxr_geometry *geo = &layer->geo;
424 struct mxr_crop *target = NULL;
425 enum mxr_geometry_stage stage;
426 struct mxr_geometry tmp;
427 struct v4l2_rect res;
428
429 memset(&res, 0, sizeof res);
430
431 mxr_dbg(layer->mdev, "%s: rect: %dx%d@%d,%d\n", __func__,
432 s->r.width, s->r.height, s->r.left, s->r.top);
433
434 if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT &&
435 s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
436 return -EINVAL;
437
438 switch (s->target) {
439 /* ignore read-only targets */
440 case V4L2_SEL_TGT_CROP_DEFAULT:
441 case V4L2_SEL_TGT_CROP_BOUNDS:
442 res.width = geo->src.full_width;
443 res.height = geo->src.full_height;
444 break;
445
446 /* ignore read-only targets */
447 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
448 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
449 res.width = geo->dst.full_width;
450 res.height = geo->dst.full_height;
451 break;
452
453 case V4L2_SEL_TGT_CROP_ACTIVE:
454 target = &geo->src;
455 stage = MXR_GEOMETRY_CROP;
456 break;
457 case V4L2_SEL_TGT_COMPOSE_ACTIVE:
458 case V4L2_SEL_TGT_COMPOSE_PADDED:
459 target = &geo->dst;
460 stage = MXR_GEOMETRY_COMPOSE;
461 break;
462 default:
463 return -EINVAL;
464 }
465 /* apply change and update geometry if needed */
466 if (target) {
467 /* backup current geometry if setup fails */
468 memcpy(&tmp, geo, sizeof tmp);
469
470 /* apply requested selection */
471 target->x_offset = s->r.left;
472 target->y_offset = s->r.top;
473 target->width = s->r.width;
474 target->height = s->r.height;
475
476 layer->ops.fix_geometry(layer, stage, s->flags);
477
478 /* retrieve update selection rectangle */
479 res.left = target->x_offset;
480 res.top = target->y_offset;
481 res.width = target->width;
482 res.height = target->height;
483
484 mxr_geometry_dump(layer->mdev, &layer->geo);
485 }
486
487 /* checking if the rectangle satisfies constraints */
488 if ((s->flags & V4L2_SEL_FLAG_LE) && !mxr_is_rect_inside(&res, &s->r))
489 goto fail;
490 if ((s->flags & V4L2_SEL_FLAG_GE) && !mxr_is_rect_inside(&s->r, &res))
491 goto fail;
492
493 /* return result rectangle */
494 s->r = res;
495
496 return 0;
497 fail:
498 /* restore old geometry, which is not touched if target is NULL */
499 if (target)
500 memcpy(geo, &tmp, sizeof tmp);
501 return -ERANGE;
502 }
503
mxr_enum_dv_presets(struct file * file,void * fh,struct v4l2_dv_enum_preset * preset)504 static int mxr_enum_dv_presets(struct file *file, void *fh,
505 struct v4l2_dv_enum_preset *preset)
506 {
507 struct mxr_layer *layer = video_drvdata(file);
508 struct mxr_device *mdev = layer->mdev;
509 int ret;
510
511 /* lock protects from changing sd_out */
512 mutex_lock(&mdev->mutex);
513 ret = v4l2_subdev_call(to_outsd(mdev), video, enum_dv_presets, preset);
514 mutex_unlock(&mdev->mutex);
515
516 return ret ? -EINVAL : 0;
517 }
518
mxr_s_dv_preset(struct file * file,void * fh,struct v4l2_dv_preset * preset)519 static int mxr_s_dv_preset(struct file *file, void *fh,
520 struct v4l2_dv_preset *preset)
521 {
522 struct mxr_layer *layer = video_drvdata(file);
523 struct mxr_device *mdev = layer->mdev;
524 int ret;
525
526 /* lock protects from changing sd_out */
527 mutex_lock(&mdev->mutex);
528
529 /* preset change cannot be done while there is an entity
530 * dependant on output configuration
531 */
532 if (mdev->n_output > 0) {
533 mutex_unlock(&mdev->mutex);
534 return -EBUSY;
535 }
536
537 ret = v4l2_subdev_call(to_outsd(mdev), video, s_dv_preset, preset);
538
539 mutex_unlock(&mdev->mutex);
540
541 mxr_layer_update_output(layer);
542
543 /* any failure should return EINVAL according to V4L2 doc */
544 return ret ? -EINVAL : 0;
545 }
546
mxr_g_dv_preset(struct file * file,void * fh,struct v4l2_dv_preset * preset)547 static int mxr_g_dv_preset(struct file *file, void *fh,
548 struct v4l2_dv_preset *preset)
549 {
550 struct mxr_layer *layer = video_drvdata(file);
551 struct mxr_device *mdev = layer->mdev;
552 int ret;
553
554 /* lock protects from changing sd_out */
555 mutex_lock(&mdev->mutex);
556 ret = v4l2_subdev_call(to_outsd(mdev), video, g_dv_preset, preset);
557 mutex_unlock(&mdev->mutex);
558
559 return ret ? -EINVAL : 0;
560 }
561
mxr_s_std(struct file * file,void * fh,v4l2_std_id * norm)562 static int mxr_s_std(struct file *file, void *fh, v4l2_std_id *norm)
563 {
564 struct mxr_layer *layer = video_drvdata(file);
565 struct mxr_device *mdev = layer->mdev;
566 int ret;
567
568 /* lock protects from changing sd_out */
569 mutex_lock(&mdev->mutex);
570
571 /* standard change cannot be done while there is an entity
572 * dependant on output configuration
573 */
574 if (mdev->n_output > 0) {
575 mutex_unlock(&mdev->mutex);
576 return -EBUSY;
577 }
578
579 ret = v4l2_subdev_call(to_outsd(mdev), video, s_std_output, *norm);
580
581 mutex_unlock(&mdev->mutex);
582
583 mxr_layer_update_output(layer);
584
585 return ret ? -EINVAL : 0;
586 }
587
mxr_g_std(struct file * file,void * fh,v4l2_std_id * norm)588 static int mxr_g_std(struct file *file, void *fh, v4l2_std_id *norm)
589 {
590 struct mxr_layer *layer = video_drvdata(file);
591 struct mxr_device *mdev = layer->mdev;
592 int ret;
593
594 /* lock protects from changing sd_out */
595 mutex_lock(&mdev->mutex);
596 ret = v4l2_subdev_call(to_outsd(mdev), video, g_std_output, norm);
597 mutex_unlock(&mdev->mutex);
598
599 return ret ? -EINVAL : 0;
600 }
601
mxr_enum_output(struct file * file,void * fh,struct v4l2_output * a)602 static int mxr_enum_output(struct file *file, void *fh, struct v4l2_output *a)
603 {
604 struct mxr_layer *layer = video_drvdata(file);
605 struct mxr_device *mdev = layer->mdev;
606 struct mxr_output *out;
607 struct v4l2_subdev *sd;
608
609 if (a->index >= mdev->output_cnt)
610 return -EINVAL;
611 out = mdev->output[a->index];
612 BUG_ON(out == NULL);
613 sd = out->sd;
614 strlcpy(a->name, out->name, sizeof(a->name));
615
616 /* try to obtain supported tv norms */
617 v4l2_subdev_call(sd, video, g_tvnorms_output, &a->std);
618 a->capabilities = 0;
619 if (sd->ops->video && sd->ops->video->s_dv_preset)
620 a->capabilities |= V4L2_OUT_CAP_PRESETS;
621 if (sd->ops->video && sd->ops->video->s_std_output)
622 a->capabilities |= V4L2_OUT_CAP_STD;
623 a->type = V4L2_OUTPUT_TYPE_ANALOG;
624
625 return 0;
626 }
627
mxr_s_output(struct file * file,void * fh,unsigned int i)628 static int mxr_s_output(struct file *file, void *fh, unsigned int i)
629 {
630 struct video_device *vfd = video_devdata(file);
631 struct mxr_layer *layer = video_drvdata(file);
632 struct mxr_device *mdev = layer->mdev;
633
634 if (i >= mdev->output_cnt || mdev->output[i] == NULL)
635 return -EINVAL;
636
637 mutex_lock(&mdev->mutex);
638 if (mdev->n_output > 0) {
639 mutex_unlock(&mdev->mutex);
640 return -EBUSY;
641 }
642 mdev->current_output = i;
643 vfd->tvnorms = 0;
644 v4l2_subdev_call(to_outsd(mdev), video, g_tvnorms_output,
645 &vfd->tvnorms);
646 mutex_unlock(&mdev->mutex);
647
648 /* update layers geometry */
649 mxr_layer_update_output(layer);
650
651 mxr_dbg(mdev, "tvnorms = %08llx\n", vfd->tvnorms);
652
653 return 0;
654 }
655
mxr_g_output(struct file * file,void * fh,unsigned int * p)656 static int mxr_g_output(struct file *file, void *fh, unsigned int *p)
657 {
658 struct mxr_layer *layer = video_drvdata(file);
659 struct mxr_device *mdev = layer->mdev;
660
661 mutex_lock(&mdev->mutex);
662 *p = mdev->current_output;
663 mutex_unlock(&mdev->mutex);
664
665 return 0;
666 }
667
mxr_reqbufs(struct file * file,void * priv,struct v4l2_requestbuffers * p)668 static int mxr_reqbufs(struct file *file, void *priv,
669 struct v4l2_requestbuffers *p)
670 {
671 struct mxr_layer *layer = video_drvdata(file);
672
673 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
674 return vb2_reqbufs(&layer->vb_queue, p);
675 }
676
mxr_querybuf(struct file * file,void * priv,struct v4l2_buffer * p)677 static int mxr_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
678 {
679 struct mxr_layer *layer = video_drvdata(file);
680
681 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
682 return vb2_querybuf(&layer->vb_queue, p);
683 }
684
mxr_qbuf(struct file * file,void * priv,struct v4l2_buffer * p)685 static int mxr_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
686 {
687 struct mxr_layer *layer = video_drvdata(file);
688
689 mxr_dbg(layer->mdev, "%s:%d(%d)\n", __func__, __LINE__, p->index);
690 return vb2_qbuf(&layer->vb_queue, p);
691 }
692
mxr_dqbuf(struct file * file,void * priv,struct v4l2_buffer * p)693 static int mxr_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
694 {
695 struct mxr_layer *layer = video_drvdata(file);
696
697 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
698 return vb2_dqbuf(&layer->vb_queue, p, file->f_flags & O_NONBLOCK);
699 }
700
mxr_streamon(struct file * file,void * priv,enum v4l2_buf_type i)701 static int mxr_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
702 {
703 struct mxr_layer *layer = video_drvdata(file);
704
705 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
706 return vb2_streamon(&layer->vb_queue, i);
707 }
708
mxr_streamoff(struct file * file,void * priv,enum v4l2_buf_type i)709 static int mxr_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
710 {
711 struct mxr_layer *layer = video_drvdata(file);
712
713 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
714 return vb2_streamoff(&layer->vb_queue, i);
715 }
716
717 static const struct v4l2_ioctl_ops mxr_ioctl_ops = {
718 .vidioc_querycap = mxr_querycap,
719 /* format handling */
720 .vidioc_enum_fmt_vid_out = mxr_enum_fmt,
721 .vidioc_s_fmt_vid_out_mplane = mxr_s_fmt,
722 .vidioc_g_fmt_vid_out_mplane = mxr_g_fmt,
723 /* buffer control */
724 .vidioc_reqbufs = mxr_reqbufs,
725 .vidioc_querybuf = mxr_querybuf,
726 .vidioc_qbuf = mxr_qbuf,
727 .vidioc_dqbuf = mxr_dqbuf,
728 /* Streaming control */
729 .vidioc_streamon = mxr_streamon,
730 .vidioc_streamoff = mxr_streamoff,
731 /* Preset functions */
732 .vidioc_enum_dv_presets = mxr_enum_dv_presets,
733 .vidioc_s_dv_preset = mxr_s_dv_preset,
734 .vidioc_g_dv_preset = mxr_g_dv_preset,
735 /* analog TV standard functions */
736 .vidioc_s_std = mxr_s_std,
737 .vidioc_g_std = mxr_g_std,
738 /* Output handling */
739 .vidioc_enum_output = mxr_enum_output,
740 .vidioc_s_output = mxr_s_output,
741 .vidioc_g_output = mxr_g_output,
742 /* selection ioctls */
743 .vidioc_g_selection = mxr_g_selection,
744 .vidioc_s_selection = mxr_s_selection,
745 };
746
mxr_video_open(struct file * file)747 static int mxr_video_open(struct file *file)
748 {
749 struct mxr_layer *layer = video_drvdata(file);
750 struct mxr_device *mdev = layer->mdev;
751 int ret = 0;
752
753 mxr_dbg(mdev, "%s:%d\n", __func__, __LINE__);
754 /* assure device probe is finished */
755 wait_for_device_probe();
756 /* creating context for file descriptor */
757 ret = v4l2_fh_open(file);
758 if (ret) {
759 mxr_err(mdev, "v4l2_fh_open failed\n");
760 return ret;
761 }
762
763 /* leaving if layer is already initialized */
764 if (!v4l2_fh_is_singular_file(file))
765 return 0;
766
767 /* FIXME: should power be enabled on open? */
768 ret = mxr_power_get(mdev);
769 if (ret) {
770 mxr_err(mdev, "power on failed\n");
771 goto fail_fh_open;
772 }
773
774 ret = vb2_queue_init(&layer->vb_queue);
775 if (ret != 0) {
776 mxr_err(mdev, "failed to initialize vb2 queue\n");
777 goto fail_power;
778 }
779 /* set default format, first on the list */
780 layer->fmt = layer->fmt_array[0];
781 /* setup default geometry */
782 mxr_layer_default_geo(layer);
783
784 return 0;
785
786 fail_power:
787 mxr_power_put(mdev);
788
789 fail_fh_open:
790 v4l2_fh_release(file);
791
792 return ret;
793 }
794
795 static unsigned int
mxr_video_poll(struct file * file,struct poll_table_struct * wait)796 mxr_video_poll(struct file *file, struct poll_table_struct *wait)
797 {
798 struct mxr_layer *layer = video_drvdata(file);
799
800 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
801
802 return vb2_poll(&layer->vb_queue, file, wait);
803 }
804
mxr_video_mmap(struct file * file,struct vm_area_struct * vma)805 static int mxr_video_mmap(struct file *file, struct vm_area_struct *vma)
806 {
807 struct mxr_layer *layer = video_drvdata(file);
808
809 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
810
811 return vb2_mmap(&layer->vb_queue, vma);
812 }
813
mxr_video_release(struct file * file)814 static int mxr_video_release(struct file *file)
815 {
816 struct mxr_layer *layer = video_drvdata(file);
817
818 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
819 if (v4l2_fh_is_singular_file(file)) {
820 vb2_queue_release(&layer->vb_queue);
821 mxr_power_put(layer->mdev);
822 }
823 v4l2_fh_release(file);
824 return 0;
825 }
826
827 static const struct v4l2_file_operations mxr_fops = {
828 .owner = THIS_MODULE,
829 .open = mxr_video_open,
830 .poll = mxr_video_poll,
831 .mmap = mxr_video_mmap,
832 .release = mxr_video_release,
833 .unlocked_ioctl = video_ioctl2,
834 };
835
queue_setup(struct vb2_queue * vq,const struct v4l2_format * pfmt,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],void * alloc_ctxs[])836 static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *pfmt,
837 unsigned int *nbuffers, unsigned int *nplanes, unsigned int sizes[],
838 void *alloc_ctxs[])
839 {
840 struct mxr_layer *layer = vb2_get_drv_priv(vq);
841 const struct mxr_format *fmt = layer->fmt;
842 int i;
843 struct mxr_device *mdev = layer->mdev;
844 struct v4l2_plane_pix_format planes[3];
845
846 mxr_dbg(mdev, "%s\n", __func__);
847 /* checking if format was configured */
848 if (fmt == NULL)
849 return -EINVAL;
850 mxr_dbg(mdev, "fmt = %s\n", fmt->name);
851 mxr_mplane_fill(planes, fmt, layer->geo.src.full_width,
852 layer->geo.src.full_height);
853
854 *nplanes = fmt->num_subframes;
855 for (i = 0; i < fmt->num_subframes; ++i) {
856 alloc_ctxs[i] = layer->mdev->alloc_ctx;
857 sizes[i] = PAGE_ALIGN(planes[i].sizeimage);
858 mxr_dbg(mdev, "size[%d] = %08lx\n", i, sizes[i]);
859 }
860
861 if (*nbuffers == 0)
862 *nbuffers = 1;
863
864 return 0;
865 }
866
buf_queue(struct vb2_buffer * vb)867 static void buf_queue(struct vb2_buffer *vb)
868 {
869 struct mxr_buffer *buffer = container_of(vb, struct mxr_buffer, vb);
870 struct mxr_layer *layer = vb2_get_drv_priv(vb->vb2_queue);
871 struct mxr_device *mdev = layer->mdev;
872 unsigned long flags;
873
874 spin_lock_irqsave(&layer->enq_slock, flags);
875 list_add_tail(&buffer->list, &layer->enq_list);
876 spin_unlock_irqrestore(&layer->enq_slock, flags);
877
878 mxr_dbg(mdev, "queuing buffer\n");
879 }
880
wait_lock(struct vb2_queue * vq)881 static void wait_lock(struct vb2_queue *vq)
882 {
883 struct mxr_layer *layer = vb2_get_drv_priv(vq);
884
885 mxr_dbg(layer->mdev, "%s\n", __func__);
886 mutex_lock(&layer->mutex);
887 }
888
wait_unlock(struct vb2_queue * vq)889 static void wait_unlock(struct vb2_queue *vq)
890 {
891 struct mxr_layer *layer = vb2_get_drv_priv(vq);
892
893 mxr_dbg(layer->mdev, "%s\n", __func__);
894 mutex_unlock(&layer->mutex);
895 }
896
start_streaming(struct vb2_queue * vq,unsigned int count)897 static int start_streaming(struct vb2_queue *vq, unsigned int count)
898 {
899 struct mxr_layer *layer = vb2_get_drv_priv(vq);
900 struct mxr_device *mdev = layer->mdev;
901 unsigned long flags;
902
903 mxr_dbg(mdev, "%s\n", __func__);
904
905 if (count == 0) {
906 mxr_dbg(mdev, "no output buffers queued\n");
907 return -EINVAL;
908 }
909
910 /* block any changes in output configuration */
911 mxr_output_get(mdev);
912
913 mxr_layer_update_output(layer);
914 layer->ops.format_set(layer);
915 /* enabling layer in hardware */
916 spin_lock_irqsave(&layer->enq_slock, flags);
917 layer->state = MXR_LAYER_STREAMING;
918 spin_unlock_irqrestore(&layer->enq_slock, flags);
919
920 layer->ops.stream_set(layer, MXR_ENABLE);
921 mxr_streamer_get(mdev);
922
923 return 0;
924 }
925
mxr_watchdog(unsigned long arg)926 static void mxr_watchdog(unsigned long arg)
927 {
928 struct mxr_layer *layer = (struct mxr_layer *) arg;
929 struct mxr_device *mdev = layer->mdev;
930 unsigned long flags;
931
932 mxr_err(mdev, "watchdog fired for layer %s\n", layer->vfd.name);
933
934 spin_lock_irqsave(&layer->enq_slock, flags);
935
936 if (layer->update_buf == layer->shadow_buf)
937 layer->update_buf = NULL;
938 if (layer->update_buf) {
939 vb2_buffer_done(&layer->update_buf->vb, VB2_BUF_STATE_ERROR);
940 layer->update_buf = NULL;
941 }
942 if (layer->shadow_buf) {
943 vb2_buffer_done(&layer->shadow_buf->vb, VB2_BUF_STATE_ERROR);
944 layer->shadow_buf = NULL;
945 }
946 spin_unlock_irqrestore(&layer->enq_slock, flags);
947 }
948
stop_streaming(struct vb2_queue * vq)949 static int stop_streaming(struct vb2_queue *vq)
950 {
951 struct mxr_layer *layer = vb2_get_drv_priv(vq);
952 struct mxr_device *mdev = layer->mdev;
953 unsigned long flags;
954 struct timer_list watchdog;
955 struct mxr_buffer *buf, *buf_tmp;
956
957 mxr_dbg(mdev, "%s\n", __func__);
958
959 spin_lock_irqsave(&layer->enq_slock, flags);
960
961 /* reset list */
962 layer->state = MXR_LAYER_STREAMING_FINISH;
963
964 /* set all buffer to be done */
965 list_for_each_entry_safe(buf, buf_tmp, &layer->enq_list, list) {
966 list_del(&buf->list);
967 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
968 }
969
970 spin_unlock_irqrestore(&layer->enq_slock, flags);
971
972 /* give 1 seconds to complete to complete last buffers */
973 setup_timer_on_stack(&watchdog, mxr_watchdog,
974 (unsigned long)layer);
975 mod_timer(&watchdog, jiffies + msecs_to_jiffies(1000));
976
977 /* wait until all buffers are goes to done state */
978 vb2_wait_for_all_buffers(vq);
979
980 /* stop timer if all synchronization is done */
981 del_timer_sync(&watchdog);
982 destroy_timer_on_stack(&watchdog);
983
984 /* stopping hardware */
985 spin_lock_irqsave(&layer->enq_slock, flags);
986 layer->state = MXR_LAYER_IDLE;
987 spin_unlock_irqrestore(&layer->enq_slock, flags);
988
989 /* disabling layer in hardware */
990 layer->ops.stream_set(layer, MXR_DISABLE);
991 /* remove one streamer */
992 mxr_streamer_put(mdev);
993 /* allow changes in output configuration */
994 mxr_output_put(mdev);
995 return 0;
996 }
997
998 static struct vb2_ops mxr_video_qops = {
999 .queue_setup = queue_setup,
1000 .buf_queue = buf_queue,
1001 .wait_prepare = wait_unlock,
1002 .wait_finish = wait_lock,
1003 .start_streaming = start_streaming,
1004 .stop_streaming = stop_streaming,
1005 };
1006
1007 /* FIXME: try to put this functions to mxr_base_layer_create */
mxr_base_layer_register(struct mxr_layer * layer)1008 int mxr_base_layer_register(struct mxr_layer *layer)
1009 {
1010 struct mxr_device *mdev = layer->mdev;
1011 int ret;
1012
1013 ret = video_register_device(&layer->vfd, VFL_TYPE_GRABBER, -1);
1014 if (ret)
1015 mxr_err(mdev, "failed to register video device\n");
1016 else
1017 mxr_info(mdev, "registered layer %s as /dev/video%d\n",
1018 layer->vfd.name, layer->vfd.num);
1019 return ret;
1020 }
1021
mxr_base_layer_unregister(struct mxr_layer * layer)1022 void mxr_base_layer_unregister(struct mxr_layer *layer)
1023 {
1024 video_unregister_device(&layer->vfd);
1025 }
1026
mxr_layer_release(struct mxr_layer * layer)1027 void mxr_layer_release(struct mxr_layer *layer)
1028 {
1029 if (layer->ops.release)
1030 layer->ops.release(layer);
1031 }
1032
mxr_base_layer_release(struct mxr_layer * layer)1033 void mxr_base_layer_release(struct mxr_layer *layer)
1034 {
1035 kfree(layer);
1036 }
1037
mxr_vfd_release(struct video_device * vdev)1038 static void mxr_vfd_release(struct video_device *vdev)
1039 {
1040 printk(KERN_INFO "video device release\n");
1041 }
1042
mxr_base_layer_create(struct mxr_device * mdev,int idx,char * name,struct mxr_layer_ops * ops)1043 struct mxr_layer *mxr_base_layer_create(struct mxr_device *mdev,
1044 int idx, char *name, struct mxr_layer_ops *ops)
1045 {
1046 struct mxr_layer *layer;
1047
1048 layer = kzalloc(sizeof *layer, GFP_KERNEL);
1049 if (layer == NULL) {
1050 mxr_err(mdev, "not enough memory for layer.\n");
1051 goto fail;
1052 }
1053
1054 layer->mdev = mdev;
1055 layer->idx = idx;
1056 layer->ops = *ops;
1057
1058 spin_lock_init(&layer->enq_slock);
1059 INIT_LIST_HEAD(&layer->enq_list);
1060 mutex_init(&layer->mutex);
1061
1062 layer->vfd = (struct video_device) {
1063 .minor = -1,
1064 .release = mxr_vfd_release,
1065 .fops = &mxr_fops,
1066 .ioctl_ops = &mxr_ioctl_ops,
1067 };
1068 strlcpy(layer->vfd.name, name, sizeof(layer->vfd.name));
1069 /* let framework control PRIORITY */
1070 set_bit(V4L2_FL_USE_FH_PRIO, &layer->vfd.flags);
1071
1072 video_set_drvdata(&layer->vfd, layer);
1073 layer->vfd.lock = &layer->mutex;
1074 layer->vfd.v4l2_dev = &mdev->v4l2_dev;
1075
1076 layer->vb_queue = (struct vb2_queue) {
1077 .type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,
1078 .io_modes = VB2_MMAP | VB2_USERPTR,
1079 .drv_priv = layer,
1080 .buf_struct_size = sizeof(struct mxr_buffer),
1081 .ops = &mxr_video_qops,
1082 .mem_ops = &vb2_dma_contig_memops,
1083 };
1084
1085 return layer;
1086
1087 fail:
1088 return NULL;
1089 }
1090
find_format_by_fourcc(struct mxr_layer * layer,unsigned long fourcc)1091 static const struct mxr_format *find_format_by_fourcc(
1092 struct mxr_layer *layer, unsigned long fourcc)
1093 {
1094 int i;
1095
1096 for (i = 0; i < layer->fmt_array_size; ++i)
1097 if (layer->fmt_array[i]->fourcc == fourcc)
1098 return layer->fmt_array[i];
1099 return NULL;
1100 }
1101
find_format_by_index(struct mxr_layer * layer,unsigned long index)1102 static const struct mxr_format *find_format_by_index(
1103 struct mxr_layer *layer, unsigned long index)
1104 {
1105 if (index >= layer->fmt_array_size)
1106 return NULL;
1107 return layer->fmt_array[index];
1108 }
1109
1110