2 * Samsung TV Mixer driver
4 * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
6 * Tomasz Stanislawski, <t.stanislaws@samsung.com>
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
16 #include <media/v4l2-ioctl.h>
17 #include <linux/videodev2.h>
19 #include <linux/version.h>
20 #include <linux/timer.h>
21 #include <media/videobuf2-dma-contig.h>
23 static int find_reg_callback(struct device *dev, void *p)
25 struct v4l2_subdev **sd = p;
27 *sd = dev_get_drvdata(dev);
28 /* non-zero value stops iteration */
32 static struct v4l2_subdev *find_and_register_subdev(
33 struct mxr_device *mdev, char *module_name)
35 struct device_driver *drv;
36 struct v4l2_subdev *sd = NULL;
39 /* TODO: add waiting until probe is finished */
40 drv = driver_find(module_name, &platform_bus_type);
42 mxr_warn(mdev, "module %s is missing\n", module_name);
45 /* driver refcnt is increased, it is safe to iterate over devices */
46 ret = driver_for_each_device(drv, NULL, &sd, find_reg_callback);
47 /* ret == 0 means that find_reg_callback was never executed */
49 mxr_warn(mdev, "module %s provides no subdev!\n", module_name);
52 /* v4l2_device_register_subdev detects if sd is NULL */
53 ret = v4l2_device_register_subdev(&mdev->v4l2_dev, sd);
55 mxr_warn(mdev, "failed to register subdev %s\n", sd->name);
64 int __devinit mxr_acquire_video(struct mxr_device *mdev,
65 struct mxr_output_conf *output_conf, int output_count)
67 struct device *dev = mdev->dev;
68 struct v4l2_device *v4l2_dev = &mdev->v4l2_dev;
71 struct v4l2_subdev *sd;
73 strlcpy(v4l2_dev->name, dev_name(mdev->dev), sizeof(v4l2_dev->name));
74 /* prepare context for V4L2 device */
75 ret = v4l2_device_register(dev, v4l2_dev);
77 mxr_err(mdev, "could not register v4l2 device.\n");
81 mdev->alloc_ctx = vb2_dma_contig_init_ctx(mdev->dev);
82 if (IS_ERR_OR_NULL(mdev->alloc_ctx)) {
83 mxr_err(mdev, "could not acquire vb2 allocator\n");
87 /* registering outputs */
89 for (i = 0; i < output_count; ++i) {
90 struct mxr_output_conf *conf = &output_conf[i];
91 struct mxr_output *out;
93 sd = find_and_register_subdev(mdev, conf->module_name);
94 /* trying to register next output */
97 out = kzalloc(sizeof *out, GFP_KERNEL);
99 mxr_err(mdev, "no memory for '%s'\n",
102 /* registered subdevs are removed in fail_v4l2_dev */
105 strlcpy(out->name, conf->output_name, sizeof(out->name));
107 out->cookie = conf->cookie;
108 mdev->output[mdev->output_cnt++] = out;
109 mxr_info(mdev, "added output '%s' from module '%s'\n",
110 conf->output_name, conf->module_name);
111 /* checking if maximal number of outputs is reached */
112 if (mdev->output_cnt >= MXR_MAX_OUTPUTS)
116 if (mdev->output_cnt == 0) {
117 mxr_err(mdev, "failed to register any output\n");
119 /* skipping fail_output because there is nothing to free */
120 goto fail_vb2_allocator;
126 /* kfree is NULL-safe */
127 for (i = 0; i < mdev->output_cnt; ++i)
128 kfree(mdev->output[i]);
129 memset(mdev->output, 0, sizeof mdev->output);
132 /* freeing allocator context */
133 vb2_dma_contig_cleanup_ctx(mdev->alloc_ctx);
136 /* NOTE: automatically unregister all subdevs */
137 v4l2_device_unregister(v4l2_dev);
143 void __devexit mxr_release_video(struct mxr_device *mdev)
147 /* kfree is NULL-safe */
148 for (i = 0; i < mdev->output_cnt; ++i)
149 kfree(mdev->output[i]);
151 vb2_dma_contig_cleanup_ctx(mdev->alloc_ctx);
152 v4l2_device_unregister(&mdev->v4l2_dev);
155 static int mxr_querycap(struct file *file, void *priv,
156 struct v4l2_capability *cap)
158 struct mxr_layer *layer = video_drvdata(file);
160 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
162 strlcpy(cap->driver, MXR_DRIVER_NAME, sizeof cap->driver);
163 strlcpy(cap->card, layer->vfd.name, sizeof cap->card);
164 sprintf(cap->bus_info, "%d", layer->idx);
165 cap->version = KERNEL_VERSION(0, 1, 0);
166 cap->capabilities = V4L2_CAP_STREAMING |
167 V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
172 /* Geometry handling */
173 static void mxr_layer_geo_fix(struct mxr_layer *layer)
175 struct mxr_device *mdev = layer->mdev;
176 struct v4l2_mbus_framefmt mbus_fmt;
178 /* TODO: add some dirty flag to avoid unnecessary adjustments */
179 mxr_get_mbus_fmt(mdev, &mbus_fmt);
180 layer->geo.dst.full_width = mbus_fmt.width;
181 layer->geo.dst.full_height = mbus_fmt.height;
182 layer->geo.dst.field = mbus_fmt.field;
183 layer->ops.fix_geometry(layer);
186 static void mxr_layer_default_geo(struct mxr_layer *layer)
188 struct mxr_device *mdev = layer->mdev;
189 struct v4l2_mbus_framefmt mbus_fmt;
191 memset(&layer->geo, 0, sizeof layer->geo);
193 mxr_get_mbus_fmt(mdev, &mbus_fmt);
195 layer->geo.dst.full_width = mbus_fmt.width;
196 layer->geo.dst.full_height = mbus_fmt.height;
197 layer->geo.dst.width = layer->geo.dst.full_width;
198 layer->geo.dst.height = layer->geo.dst.full_height;
199 layer->geo.dst.field = mbus_fmt.field;
201 layer->geo.src.full_width = mbus_fmt.width;
202 layer->geo.src.full_height = mbus_fmt.height;
203 layer->geo.src.width = layer->geo.src.full_width;
204 layer->geo.src.height = layer->geo.src.full_height;
206 layer->ops.fix_geometry(layer);
209 static void mxr_geometry_dump(struct mxr_device *mdev, struct mxr_geometry *geo)
211 mxr_dbg(mdev, "src.full_size = (%u, %u)\n",
212 geo->src.full_width, geo->src.full_height);
213 mxr_dbg(mdev, "src.size = (%u, %u)\n",
214 geo->src.width, geo->src.height);
215 mxr_dbg(mdev, "src.offset = (%u, %u)\n",
216 geo->src.x_offset, geo->src.y_offset);
217 mxr_dbg(mdev, "dst.full_size = (%u, %u)\n",
218 geo->dst.full_width, geo->dst.full_height);
219 mxr_dbg(mdev, "dst.size = (%u, %u)\n",
220 geo->dst.width, geo->dst.height);
221 mxr_dbg(mdev, "dst.offset = (%u, %u)\n",
222 geo->dst.x_offset, geo->dst.y_offset);
223 mxr_dbg(mdev, "ratio = (%u, %u)\n",
224 geo->x_ratio, geo->y_ratio);
228 static const struct mxr_format *find_format_by_fourcc(
229 struct mxr_layer *layer, unsigned long fourcc);
230 static const struct mxr_format *find_format_by_index(
231 struct mxr_layer *layer, unsigned long index);
233 static int mxr_enum_fmt(struct file *file, void *priv,
234 struct v4l2_fmtdesc *f)
236 struct mxr_layer *layer = video_drvdata(file);
237 struct mxr_device *mdev = layer->mdev;
238 const struct mxr_format *fmt;
240 mxr_dbg(mdev, "%s\n", __func__);
241 fmt = find_format_by_index(layer, f->index);
245 strlcpy(f->description, fmt->name, sizeof(f->description));
246 f->pixelformat = fmt->fourcc;
251 static int mxr_s_fmt(struct file *file, void *priv,
252 struct v4l2_format *f)
254 struct mxr_layer *layer = video_drvdata(file);
255 const struct mxr_format *fmt;
256 struct v4l2_pix_format_mplane *pix;
257 struct mxr_device *mdev = layer->mdev;
258 struct mxr_geometry *geo = &layer->geo;
260 mxr_dbg(mdev, "%s:%d\n", __func__, __LINE__);
262 pix = &f->fmt.pix_mp;
263 fmt = find_format_by_fourcc(layer, pix->pixelformat);
265 mxr_warn(mdev, "not recognized fourcc: %08x\n",
270 geo->src.full_width = pix->width;
271 geo->src.width = pix->width;
272 geo->src.full_height = pix->height;
273 geo->src.height = pix->height;
274 /* assure consistency of geometry */
275 mxr_layer_geo_fix(layer);
276 mxr_dbg(mdev, "width=%u height=%u span=%u\n",
277 geo->src.width, geo->src.height, geo->src.full_width);
282 static unsigned int divup(unsigned int divident, unsigned int divisor)
284 return (divident + divisor - 1) / divisor;
287 unsigned long mxr_get_plane_size(const struct mxr_block *blk,
288 unsigned int width, unsigned int height)
290 unsigned int bl_width = divup(width, blk->width);
291 unsigned int bl_height = divup(height, blk->height);
293 return bl_width * bl_height * blk->size;
296 static void mxr_mplane_fill(struct v4l2_plane_pix_format *planes,
297 const struct mxr_format *fmt, u32 width, u32 height)
301 memset(planes, 0, sizeof(*planes) * fmt->num_subframes);
302 for (i = 0; i < fmt->num_planes; ++i) {
303 struct v4l2_plane_pix_format *plane = planes
304 + fmt->plane2subframe[i];
305 const struct mxr_block *blk = &fmt->plane[i];
306 u32 bl_width = divup(width, blk->width);
307 u32 bl_height = divup(height, blk->height);
308 u32 sizeimage = bl_width * bl_height * blk->size;
309 u16 bytesperline = bl_width * blk->size / blk->height;
311 plane->sizeimage += sizeimage;
312 plane->bytesperline = max(plane->bytesperline, bytesperline);
316 static int mxr_g_fmt(struct file *file, void *priv,
317 struct v4l2_format *f)
319 struct mxr_layer *layer = video_drvdata(file);
320 struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
322 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
324 pix->width = layer->geo.src.full_width;
325 pix->height = layer->geo.src.full_height;
326 pix->field = V4L2_FIELD_NONE;
327 pix->pixelformat = layer->fmt->fourcc;
328 pix->colorspace = layer->fmt->colorspace;
329 mxr_mplane_fill(pix->plane_fmt, layer->fmt, pix->width, pix->height);
334 static inline struct mxr_crop *choose_crop_by_type(struct mxr_geometry *geo,
335 enum v4l2_buf_type type)
338 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
339 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
341 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
348 static int mxr_g_crop(struct file *file, void *fh, struct v4l2_crop *a)
350 struct mxr_layer *layer = video_drvdata(file);
351 struct mxr_crop *crop;
353 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
354 crop = choose_crop_by_type(&layer->geo, a->type);
357 mxr_layer_geo_fix(layer);
358 a->c.left = crop->x_offset;
359 a->c.top = crop->y_offset;
360 a->c.width = crop->width;
361 a->c.height = crop->height;
365 static int mxr_s_crop(struct file *file, void *fh, struct v4l2_crop *a)
367 struct mxr_layer *layer = video_drvdata(file);
368 struct mxr_crop *crop;
370 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
371 crop = choose_crop_by_type(&layer->geo, a->type);
374 crop->x_offset = a->c.left;
375 crop->y_offset = a->c.top;
376 crop->width = a->c.width;
377 crop->height = a->c.height;
378 mxr_layer_geo_fix(layer);
382 static int mxr_cropcap(struct file *file, void *fh, struct v4l2_cropcap *a)
384 struct mxr_layer *layer = video_drvdata(file);
385 struct mxr_crop *crop;
387 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
388 crop = choose_crop_by_type(&layer->geo, a->type);
391 mxr_layer_geo_fix(layer);
394 a->bounds.width = crop->full_width;
395 a->bounds.top = crop->full_height;
396 a->defrect = a->bounds;
397 /* setting pixel aspect to 1/1 */
398 a->pixelaspect.numerator = 1;
399 a->pixelaspect.denominator = 1;
403 static int mxr_enum_dv_presets(struct file *file, void *fh,
404 struct v4l2_dv_enum_preset *preset)
406 struct mxr_layer *layer = video_drvdata(file);
407 struct mxr_device *mdev = layer->mdev;
410 /* lock protects from changing sd_out */
411 mutex_lock(&mdev->mutex);
412 ret = v4l2_subdev_call(to_outsd(mdev), video, enum_dv_presets, preset);
413 mutex_unlock(&mdev->mutex);
415 return ret ? -EINVAL : 0;
418 static int mxr_s_dv_preset(struct file *file, void *fh,
419 struct v4l2_dv_preset *preset)
421 struct mxr_layer *layer = video_drvdata(file);
422 struct mxr_device *mdev = layer->mdev;
425 /* lock protects from changing sd_out */
426 mutex_lock(&mdev->mutex);
428 /* preset change cannot be done while there is an entity
429 * dependant on output configuration
431 if (mdev->n_output > 0) {
432 mutex_unlock(&mdev->mutex);
436 ret = v4l2_subdev_call(to_outsd(mdev), video, s_dv_preset, preset);
438 mutex_unlock(&mdev->mutex);
440 /* any failure should return EINVAL according to V4L2 doc */
441 return ret ? -EINVAL : 0;
444 static int mxr_g_dv_preset(struct file *file, void *fh,
445 struct v4l2_dv_preset *preset)
447 struct mxr_layer *layer = video_drvdata(file);
448 struct mxr_device *mdev = layer->mdev;
451 /* lock protects from changing sd_out */
452 mutex_lock(&mdev->mutex);
453 ret = v4l2_subdev_call(to_outsd(mdev), video, g_dv_preset, preset);
454 mutex_unlock(&mdev->mutex);
456 return ret ? -EINVAL : 0;
459 static int mxr_s_std(struct file *file, void *fh, v4l2_std_id *norm)
461 struct mxr_layer *layer = video_drvdata(file);
462 struct mxr_device *mdev = layer->mdev;
465 /* lock protects from changing sd_out */
466 mutex_lock(&mdev->mutex);
468 /* standard change cannot be done while there is an entity
469 * dependant on output configuration
471 if (mdev->n_output > 0) {
472 mutex_unlock(&mdev->mutex);
476 ret = v4l2_subdev_call(to_outsd(mdev), video, s_std_output, *norm);
478 mutex_unlock(&mdev->mutex);
480 return ret ? -EINVAL : 0;
483 static int mxr_g_std(struct file *file, void *fh, v4l2_std_id *norm)
485 struct mxr_layer *layer = video_drvdata(file);
486 struct mxr_device *mdev = layer->mdev;
489 /* lock protects from changing sd_out */
490 mutex_lock(&mdev->mutex);
491 ret = v4l2_subdev_call(to_outsd(mdev), video, g_std_output, norm);
492 mutex_unlock(&mdev->mutex);
494 return ret ? -EINVAL : 0;
497 static int mxr_enum_output(struct file *file, void *fh, struct v4l2_output *a)
499 struct mxr_layer *layer = video_drvdata(file);
500 struct mxr_device *mdev = layer->mdev;
501 struct mxr_output *out;
502 struct v4l2_subdev *sd;
504 if (a->index >= mdev->output_cnt)
506 out = mdev->output[a->index];
509 strlcpy(a->name, out->name, sizeof(a->name));
511 /* try to obtain supported tv norms */
512 v4l2_subdev_call(sd, video, g_tvnorms_output, &a->std);
514 if (sd->ops->video && sd->ops->video->s_dv_preset)
515 a->capabilities |= V4L2_OUT_CAP_PRESETS;
516 if (sd->ops->video && sd->ops->video->s_std_output)
517 a->capabilities |= V4L2_OUT_CAP_STD;
518 a->type = V4L2_OUTPUT_TYPE_ANALOG;
523 static int mxr_s_output(struct file *file, void *fh, unsigned int i)
525 struct video_device *vfd = video_devdata(file);
526 struct mxr_layer *layer = video_drvdata(file);
527 struct mxr_device *mdev = layer->mdev;
530 if (i >= mdev->output_cnt || mdev->output[i] == NULL)
533 mutex_lock(&mdev->mutex);
534 if (mdev->n_output > 0) {
538 mdev->current_output = i;
540 v4l2_subdev_call(to_outsd(mdev), video, g_tvnorms_output,
542 mxr_dbg(mdev, "tvnorms = %08llx\n", vfd->tvnorms);
545 mutex_unlock(&mdev->mutex);
549 static int mxr_g_output(struct file *file, void *fh, unsigned int *p)
551 struct mxr_layer *layer = video_drvdata(file);
552 struct mxr_device *mdev = layer->mdev;
554 mutex_lock(&mdev->mutex);
555 *p = mdev->current_output;
556 mutex_unlock(&mdev->mutex);
561 static int mxr_reqbufs(struct file *file, void *priv,
562 struct v4l2_requestbuffers *p)
564 struct mxr_layer *layer = video_drvdata(file);
566 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
567 return vb2_reqbufs(&layer->vb_queue, p);
570 static int mxr_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
572 struct mxr_layer *layer = video_drvdata(file);
574 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
575 return vb2_querybuf(&layer->vb_queue, p);
578 static int mxr_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
580 struct mxr_layer *layer = video_drvdata(file);
582 mxr_dbg(layer->mdev, "%s:%d(%d)\n", __func__, __LINE__, p->index);
583 return vb2_qbuf(&layer->vb_queue, p);
586 static int mxr_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
588 struct mxr_layer *layer = video_drvdata(file);
590 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
591 return vb2_dqbuf(&layer->vb_queue, p, file->f_flags & O_NONBLOCK);
594 static int mxr_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
596 struct mxr_layer *layer = video_drvdata(file);
598 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
599 return vb2_streamon(&layer->vb_queue, i);
602 static int mxr_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
604 struct mxr_layer *layer = video_drvdata(file);
606 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
607 return vb2_streamoff(&layer->vb_queue, i);
610 static const struct v4l2_ioctl_ops mxr_ioctl_ops = {
611 .vidioc_querycap = mxr_querycap,
612 /* format handling */
613 .vidioc_enum_fmt_vid_out = mxr_enum_fmt,
614 .vidioc_s_fmt_vid_out_mplane = mxr_s_fmt,
615 .vidioc_g_fmt_vid_out_mplane = mxr_g_fmt,
617 .vidioc_reqbufs = mxr_reqbufs,
618 .vidioc_querybuf = mxr_querybuf,
619 .vidioc_qbuf = mxr_qbuf,
620 .vidioc_dqbuf = mxr_dqbuf,
621 /* Streaming control */
622 .vidioc_streamon = mxr_streamon,
623 .vidioc_streamoff = mxr_streamoff,
624 /* Preset functions */
625 .vidioc_enum_dv_presets = mxr_enum_dv_presets,
626 .vidioc_s_dv_preset = mxr_s_dv_preset,
627 .vidioc_g_dv_preset = mxr_g_dv_preset,
628 /* analog TV standard functions */
629 .vidioc_s_std = mxr_s_std,
630 .vidioc_g_std = mxr_g_std,
631 /* Output handling */
632 .vidioc_enum_output = mxr_enum_output,
633 .vidioc_s_output = mxr_s_output,
634 .vidioc_g_output = mxr_g_output,
636 .vidioc_g_crop = mxr_g_crop,
637 .vidioc_s_crop = mxr_s_crop,
638 .vidioc_cropcap = mxr_cropcap,
641 static int mxr_video_open(struct file *file)
643 struct mxr_layer *layer = video_drvdata(file);
644 struct mxr_device *mdev = layer->mdev;
647 mxr_dbg(mdev, "%s:%d\n", __func__, __LINE__);
648 /* assure device probe is finished */
649 wait_for_device_probe();
650 /* creating context for file descriptor */
651 ret = v4l2_fh_open(file);
653 mxr_err(mdev, "v4l2_fh_open failed\n");
657 /* leaving if layer is already initialized */
658 if (!v4l2_fh_is_singular_file(file))
661 /* FIXME: should power be enabled on open? */
662 ret = mxr_power_get(mdev);
664 mxr_err(mdev, "power on failed\n");
668 ret = vb2_queue_init(&layer->vb_queue);
670 mxr_err(mdev, "failed to initialize vb2 queue\n");
673 /* set default format, first on the list */
674 layer->fmt = layer->fmt_array[0];
675 /* setup default geometry */
676 mxr_layer_default_geo(layer);
684 v4l2_fh_release(file);
690 mxr_video_poll(struct file *file, struct poll_table_struct *wait)
692 struct mxr_layer *layer = video_drvdata(file);
694 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
696 return vb2_poll(&layer->vb_queue, file, wait);
699 static int mxr_video_mmap(struct file *file, struct vm_area_struct *vma)
701 struct mxr_layer *layer = video_drvdata(file);
703 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
705 return vb2_mmap(&layer->vb_queue, vma);
708 static int mxr_video_release(struct file *file)
710 struct mxr_layer *layer = video_drvdata(file);
712 mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
713 if (v4l2_fh_is_singular_file(file)) {
714 vb2_queue_release(&layer->vb_queue);
715 mxr_power_put(layer->mdev);
717 v4l2_fh_release(file);
721 static const struct v4l2_file_operations mxr_fops = {
722 .owner = THIS_MODULE,
723 .open = mxr_video_open,
724 .poll = mxr_video_poll,
725 .mmap = mxr_video_mmap,
726 .release = mxr_video_release,
727 .unlocked_ioctl = video_ioctl2,
730 static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *pfmt,
731 unsigned int *nbuffers, unsigned int *nplanes, unsigned int sizes[],
734 struct mxr_layer *layer = vb2_get_drv_priv(vq);
735 const struct mxr_format *fmt = layer->fmt;
737 struct mxr_device *mdev = layer->mdev;
738 struct v4l2_plane_pix_format planes[3];
740 mxr_dbg(mdev, "%s\n", __func__);
741 /* checking if format was configured */
744 mxr_dbg(mdev, "fmt = %s\n", fmt->name);
745 mxr_mplane_fill(planes, fmt, layer->geo.src.full_width,
746 layer->geo.src.full_height);
748 *nplanes = fmt->num_subframes;
749 for (i = 0; i < fmt->num_subframes; ++i) {
750 alloc_ctxs[i] = layer->mdev->alloc_ctx;
751 sizes[i] = PAGE_ALIGN(planes[i].sizeimage);
752 mxr_dbg(mdev, "size[%d] = %08lx\n", i, sizes[i]);
761 static void buf_queue(struct vb2_buffer *vb)
763 struct mxr_buffer *buffer = container_of(vb, struct mxr_buffer, vb);
764 struct mxr_layer *layer = vb2_get_drv_priv(vb->vb2_queue);
765 struct mxr_device *mdev = layer->mdev;
768 spin_lock_irqsave(&layer->enq_slock, flags);
769 list_add_tail(&buffer->list, &layer->enq_list);
770 spin_unlock_irqrestore(&layer->enq_slock, flags);
772 mxr_dbg(mdev, "queuing buffer\n");
775 static void wait_lock(struct vb2_queue *vq)
777 struct mxr_layer *layer = vb2_get_drv_priv(vq);
779 mxr_dbg(layer->mdev, "%s\n", __func__);
780 mutex_lock(&layer->mutex);
783 static void wait_unlock(struct vb2_queue *vq)
785 struct mxr_layer *layer = vb2_get_drv_priv(vq);
787 mxr_dbg(layer->mdev, "%s\n", __func__);
788 mutex_unlock(&layer->mutex);
791 static int start_streaming(struct vb2_queue *vq, unsigned int count)
793 struct mxr_layer *layer = vb2_get_drv_priv(vq);
794 struct mxr_device *mdev = layer->mdev;
797 mxr_dbg(mdev, "%s\n", __func__);
800 mxr_dbg(mdev, "no output buffers queued\n");
804 /* block any changes in output configuration */
805 mxr_output_get(mdev);
807 /* update layers geometry */
808 mxr_layer_geo_fix(layer);
809 mxr_geometry_dump(mdev, &layer->geo);
811 layer->ops.format_set(layer);
812 /* enabling layer in hardware */
813 spin_lock_irqsave(&layer->enq_slock, flags);
814 layer->state = MXR_LAYER_STREAMING;
815 spin_unlock_irqrestore(&layer->enq_slock, flags);
817 layer->ops.stream_set(layer, MXR_ENABLE);
818 mxr_streamer_get(mdev);
823 static void mxr_watchdog(unsigned long arg)
825 struct mxr_layer *layer = (struct mxr_layer *) arg;
826 struct mxr_device *mdev = layer->mdev;
829 mxr_err(mdev, "watchdog fired for layer %s\n", layer->vfd.name);
831 spin_lock_irqsave(&layer->enq_slock, flags);
833 if (layer->update_buf == layer->shadow_buf)
834 layer->update_buf = NULL;
835 if (layer->update_buf) {
836 vb2_buffer_done(&layer->update_buf->vb, VB2_BUF_STATE_ERROR);
837 layer->update_buf = NULL;
839 if (layer->shadow_buf) {
840 vb2_buffer_done(&layer->shadow_buf->vb, VB2_BUF_STATE_ERROR);
841 layer->shadow_buf = NULL;
843 spin_unlock_irqrestore(&layer->enq_slock, flags);
846 static int stop_streaming(struct vb2_queue *vq)
848 struct mxr_layer *layer = vb2_get_drv_priv(vq);
849 struct mxr_device *mdev = layer->mdev;
851 struct timer_list watchdog;
852 struct mxr_buffer *buf, *buf_tmp;
854 mxr_dbg(mdev, "%s\n", __func__);
856 spin_lock_irqsave(&layer->enq_slock, flags);
859 layer->state = MXR_LAYER_STREAMING_FINISH;
861 /* set all buffer to be done */
862 list_for_each_entry_safe(buf, buf_tmp, &layer->enq_list, list) {
863 list_del(&buf->list);
864 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
867 spin_unlock_irqrestore(&layer->enq_slock, flags);
869 /* give 1 seconds to complete to complete last buffers */
870 setup_timer_on_stack(&watchdog, mxr_watchdog,
871 (unsigned long)layer);
872 mod_timer(&watchdog, jiffies + msecs_to_jiffies(1000));
874 /* wait until all buffers are goes to done state */
875 vb2_wait_for_all_buffers(vq);
877 /* stop timer if all synchronization is done */
878 del_timer_sync(&watchdog);
879 destroy_timer_on_stack(&watchdog);
881 /* stopping hardware */
882 spin_lock_irqsave(&layer->enq_slock, flags);
883 layer->state = MXR_LAYER_IDLE;
884 spin_unlock_irqrestore(&layer->enq_slock, flags);
886 /* disabling layer in hardware */
887 layer->ops.stream_set(layer, MXR_DISABLE);
888 /* remove one streamer */
889 mxr_streamer_put(mdev);
890 /* allow changes in output configuration */
891 mxr_output_put(mdev);
895 static struct vb2_ops mxr_video_qops = {
896 .queue_setup = queue_setup,
897 .buf_queue = buf_queue,
898 .wait_prepare = wait_unlock,
899 .wait_finish = wait_lock,
900 .start_streaming = start_streaming,
901 .stop_streaming = stop_streaming,
904 /* FIXME: try to put this functions to mxr_base_layer_create */
905 int mxr_base_layer_register(struct mxr_layer *layer)
907 struct mxr_device *mdev = layer->mdev;
910 ret = video_register_device(&layer->vfd, VFL_TYPE_GRABBER, -1);
912 mxr_err(mdev, "failed to register video device\n");
914 mxr_info(mdev, "registered layer %s as /dev/video%d\n",
915 layer->vfd.name, layer->vfd.num);
919 void mxr_base_layer_unregister(struct mxr_layer *layer)
921 video_unregister_device(&layer->vfd);
924 void mxr_layer_release(struct mxr_layer *layer)
926 if (layer->ops.release)
927 layer->ops.release(layer);
930 void mxr_base_layer_release(struct mxr_layer *layer)
935 static void mxr_vfd_release(struct video_device *vdev)
937 printk(KERN_INFO "video device release\n");
940 struct mxr_layer *mxr_base_layer_create(struct mxr_device *mdev,
941 int idx, char *name, struct mxr_layer_ops *ops)
943 struct mxr_layer *layer;
945 layer = kzalloc(sizeof *layer, GFP_KERNEL);
947 mxr_err(mdev, "not enough memory for layer.\n");
955 spin_lock_init(&layer->enq_slock);
956 INIT_LIST_HEAD(&layer->enq_list);
957 mutex_init(&layer->mutex);
959 layer->vfd = (struct video_device) {
961 .release = mxr_vfd_release,
963 .ioctl_ops = &mxr_ioctl_ops,
965 strlcpy(layer->vfd.name, name, sizeof(layer->vfd.name));
966 /* let framework control PRIORITY */
967 set_bit(V4L2_FL_USE_FH_PRIO, &layer->vfd.flags);
969 video_set_drvdata(&layer->vfd, layer);
970 layer->vfd.lock = &layer->mutex;
971 layer->vfd.v4l2_dev = &mdev->v4l2_dev;
973 layer->vb_queue = (struct vb2_queue) {
974 .type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,
975 .io_modes = VB2_MMAP | VB2_USERPTR,
977 .buf_struct_size = sizeof(struct mxr_buffer),
978 .ops = &mxr_video_qops,
979 .mem_ops = &vb2_dma_contig_memops,
988 static const struct mxr_format *find_format_by_fourcc(
989 struct mxr_layer *layer, unsigned long fourcc)
993 for (i = 0; i < layer->fmt_array_size; ++i)
994 if (layer->fmt_array[i]->fourcc == fourcc)
995 return layer->fmt_array[i];
999 static const struct mxr_format *find_format_by_index(
1000 struct mxr_layer *layer, unsigned long index)
1002 if (index >= layer->fmt_array_size)
1004 return layer->fmt_array[index];