803 строки
20 KiB
C
803 строки
20 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* V4L2 sub-device
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*
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* Copyright (C) 2010 Nokia Corporation
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*
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* Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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* Sakari Ailus <sakari.ailus@iki.fi>
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*/
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#include <linux/ioctl.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <linux/videodev2.h>
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#include <linux/export.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-ioctl.h>
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#include <media/v4l2-fh.h>
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#include <media/v4l2-event.h>
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static int subdev_fh_init(struct v4l2_subdev_fh *fh, struct v4l2_subdev *sd)
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{
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#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
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if (sd->entity.num_pads) {
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fh->pad = v4l2_subdev_alloc_pad_config(sd);
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if (fh->pad == NULL)
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return -ENOMEM;
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}
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#endif
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return 0;
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}
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static void subdev_fh_free(struct v4l2_subdev_fh *fh)
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{
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#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
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v4l2_subdev_free_pad_config(fh->pad);
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fh->pad = NULL;
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#endif
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}
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static int subdev_open(struct file *file)
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{
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struct video_device *vdev = video_devdata(file);
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struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
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struct v4l2_subdev_fh *subdev_fh;
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int ret;
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subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL);
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if (subdev_fh == NULL)
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return -ENOMEM;
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ret = subdev_fh_init(subdev_fh, sd);
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if (ret) {
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kfree(subdev_fh);
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return ret;
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}
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v4l2_fh_init(&subdev_fh->vfh, vdev);
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v4l2_fh_add(&subdev_fh->vfh);
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file->private_data = &subdev_fh->vfh;
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#if defined(CONFIG_MEDIA_CONTROLLER)
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if (sd->v4l2_dev->mdev && sd->entity.graph_obj.mdev->dev) {
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struct module *owner;
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owner = sd->entity.graph_obj.mdev->dev->driver->owner;
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if (!try_module_get(owner)) {
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ret = -EBUSY;
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goto err;
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}
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subdev_fh->owner = owner;
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}
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#endif
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if (sd->internal_ops && sd->internal_ops->open) {
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ret = sd->internal_ops->open(sd, subdev_fh);
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if (ret < 0)
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goto err;
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}
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return 0;
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err:
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module_put(subdev_fh->owner);
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v4l2_fh_del(&subdev_fh->vfh);
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v4l2_fh_exit(&subdev_fh->vfh);
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subdev_fh_free(subdev_fh);
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kfree(subdev_fh);
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return ret;
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}
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static int subdev_close(struct file *file)
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{
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struct video_device *vdev = video_devdata(file);
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struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
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struct v4l2_fh *vfh = file->private_data;
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struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
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if (sd->internal_ops && sd->internal_ops->close)
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sd->internal_ops->close(sd, subdev_fh);
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module_put(subdev_fh->owner);
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v4l2_fh_del(vfh);
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v4l2_fh_exit(vfh);
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subdev_fh_free(subdev_fh);
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kfree(subdev_fh);
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file->private_data = NULL;
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return 0;
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}
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static inline int check_which(__u32 which)
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{
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if (which != V4L2_SUBDEV_FORMAT_TRY &&
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which != V4L2_SUBDEV_FORMAT_ACTIVE)
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return -EINVAL;
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return 0;
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}
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static inline int check_pad(struct v4l2_subdev *sd, __u32 pad)
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{
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#if defined(CONFIG_MEDIA_CONTROLLER)
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if (sd->entity.num_pads) {
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if (pad >= sd->entity.num_pads)
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return -EINVAL;
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return 0;
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}
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#endif
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/* allow pad 0 on subdevices not registered as media entities */
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if (pad > 0)
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return -EINVAL;
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return 0;
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}
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static int check_cfg(__u32 which, struct v4l2_subdev_pad_config *cfg)
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{
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if (which == V4L2_SUBDEV_FORMAT_TRY && !cfg)
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return -EINVAL;
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return 0;
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}
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static inline int check_format(struct v4l2_subdev *sd,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_format *format)
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{
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if (!format)
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return -EINVAL;
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return check_which(format->which) ? : check_pad(sd, format->pad) ? :
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check_cfg(format->which, cfg);
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}
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static int call_get_fmt(struct v4l2_subdev *sd,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_format *format)
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{
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return check_format(sd, cfg, format) ? :
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sd->ops->pad->get_fmt(sd, cfg, format);
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}
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static int call_set_fmt(struct v4l2_subdev *sd,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_format *format)
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{
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return check_format(sd, cfg, format) ? :
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sd->ops->pad->set_fmt(sd, cfg, format);
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}
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static int call_enum_mbus_code(struct v4l2_subdev *sd,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_mbus_code_enum *code)
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{
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if (!code)
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return -EINVAL;
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return check_which(code->which) ? : check_pad(sd, code->pad) ? :
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check_cfg(code->which, cfg) ? :
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sd->ops->pad->enum_mbus_code(sd, cfg, code);
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}
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static int call_enum_frame_size(struct v4l2_subdev *sd,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_frame_size_enum *fse)
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{
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if (!fse)
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return -EINVAL;
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return check_which(fse->which) ? : check_pad(sd, fse->pad) ? :
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check_cfg(fse->which, cfg) ? :
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sd->ops->pad->enum_frame_size(sd, cfg, fse);
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}
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static inline int check_frame_interval(struct v4l2_subdev *sd,
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struct v4l2_subdev_frame_interval *fi)
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{
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if (!fi)
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return -EINVAL;
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return check_pad(sd, fi->pad);
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}
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static int call_g_frame_interval(struct v4l2_subdev *sd,
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struct v4l2_subdev_frame_interval *fi)
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{
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return check_frame_interval(sd, fi) ? :
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sd->ops->video->g_frame_interval(sd, fi);
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}
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static int call_s_frame_interval(struct v4l2_subdev *sd,
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struct v4l2_subdev_frame_interval *fi)
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{
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return check_frame_interval(sd, fi) ? :
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sd->ops->video->s_frame_interval(sd, fi);
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}
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static int call_enum_frame_interval(struct v4l2_subdev *sd,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_frame_interval_enum *fie)
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{
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if (!fie)
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return -EINVAL;
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return check_which(fie->which) ? : check_pad(sd, fie->pad) ? :
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check_cfg(fie->which, cfg) ? :
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sd->ops->pad->enum_frame_interval(sd, cfg, fie);
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}
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static inline int check_selection(struct v4l2_subdev *sd,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_selection *sel)
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{
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if (!sel)
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return -EINVAL;
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return check_which(sel->which) ? : check_pad(sd, sel->pad) ? :
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check_cfg(sel->which, cfg);
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}
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static int call_get_selection(struct v4l2_subdev *sd,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_selection *sel)
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{
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return check_selection(sd, cfg, sel) ? :
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sd->ops->pad->get_selection(sd, cfg, sel);
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}
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static int call_set_selection(struct v4l2_subdev *sd,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_selection *sel)
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{
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return check_selection(sd, cfg, sel) ? :
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sd->ops->pad->set_selection(sd, cfg, sel);
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}
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static inline int check_edid(struct v4l2_subdev *sd,
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struct v4l2_subdev_edid *edid)
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{
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if (!edid)
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return -EINVAL;
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if (edid->blocks && edid->edid == NULL)
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return -EINVAL;
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return check_pad(sd, edid->pad);
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}
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static int call_get_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid)
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{
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return check_edid(sd, edid) ? : sd->ops->pad->get_edid(sd, edid);
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}
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static int call_set_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid)
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{
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return check_edid(sd, edid) ? : sd->ops->pad->set_edid(sd, edid);
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}
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static int call_dv_timings_cap(struct v4l2_subdev *sd,
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struct v4l2_dv_timings_cap *cap)
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{
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if (!cap)
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return -EINVAL;
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return check_pad(sd, cap->pad) ? :
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sd->ops->pad->dv_timings_cap(sd, cap);
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}
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static int call_enum_dv_timings(struct v4l2_subdev *sd,
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struct v4l2_enum_dv_timings *dvt)
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{
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if (!dvt)
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return -EINVAL;
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return check_pad(sd, dvt->pad) ? :
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sd->ops->pad->enum_dv_timings(sd, dvt);
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}
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static const struct v4l2_subdev_pad_ops v4l2_subdev_call_pad_wrappers = {
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.get_fmt = call_get_fmt,
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.set_fmt = call_set_fmt,
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.enum_mbus_code = call_enum_mbus_code,
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.enum_frame_size = call_enum_frame_size,
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.enum_frame_interval = call_enum_frame_interval,
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.get_selection = call_get_selection,
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.set_selection = call_set_selection,
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.get_edid = call_get_edid,
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.set_edid = call_set_edid,
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.dv_timings_cap = call_dv_timings_cap,
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.enum_dv_timings = call_enum_dv_timings,
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};
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static const struct v4l2_subdev_video_ops v4l2_subdev_call_video_wrappers = {
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.g_frame_interval = call_g_frame_interval,
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.s_frame_interval = call_s_frame_interval,
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};
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const struct v4l2_subdev_ops v4l2_subdev_call_wrappers = {
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.pad = &v4l2_subdev_call_pad_wrappers,
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.video = &v4l2_subdev_call_video_wrappers,
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};
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EXPORT_SYMBOL(v4l2_subdev_call_wrappers);
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static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
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{
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struct video_device *vdev = video_devdata(file);
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struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
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struct v4l2_fh *vfh = file->private_data;
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#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
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struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
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int rval;
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#endif
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switch (cmd) {
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case VIDIOC_QUERYCTRL:
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/*
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* TODO: this really should be folded into v4l2_queryctrl (this
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* currently returns -EINVAL for NULL control handlers).
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* However, v4l2_queryctrl() is still called directly by
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* drivers as well and until that has been addressed I believe
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* it is safer to do the check here. The same is true for the
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* other control ioctls below.
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*/
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if (!vfh->ctrl_handler)
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return -ENOTTY;
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return v4l2_queryctrl(vfh->ctrl_handler, arg);
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case VIDIOC_QUERY_EXT_CTRL:
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if (!vfh->ctrl_handler)
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return -ENOTTY;
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return v4l2_query_ext_ctrl(vfh->ctrl_handler, arg);
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case VIDIOC_QUERYMENU:
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if (!vfh->ctrl_handler)
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return -ENOTTY;
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return v4l2_querymenu(vfh->ctrl_handler, arg);
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case VIDIOC_G_CTRL:
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if (!vfh->ctrl_handler)
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return -ENOTTY;
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return v4l2_g_ctrl(vfh->ctrl_handler, arg);
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case VIDIOC_S_CTRL:
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if (!vfh->ctrl_handler)
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return -ENOTTY;
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return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg);
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case VIDIOC_G_EXT_CTRLS:
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if (!vfh->ctrl_handler)
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return -ENOTTY;
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return v4l2_g_ext_ctrls(vfh->ctrl_handler,
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vdev, sd->v4l2_dev->mdev, arg);
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case VIDIOC_S_EXT_CTRLS:
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if (!vfh->ctrl_handler)
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return -ENOTTY;
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return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
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vdev, sd->v4l2_dev->mdev, arg);
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case VIDIOC_TRY_EXT_CTRLS:
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if (!vfh->ctrl_handler)
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return -ENOTTY;
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return v4l2_try_ext_ctrls(vfh->ctrl_handler,
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vdev, sd->v4l2_dev->mdev, arg);
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case VIDIOC_DQEVENT:
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if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
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return -ENOIOCTLCMD;
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return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK);
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case VIDIOC_SUBSCRIBE_EVENT:
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return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg);
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case VIDIOC_UNSUBSCRIBE_EVENT:
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return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg);
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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case VIDIOC_DBG_G_REGISTER:
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{
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struct v4l2_dbg_register *p = arg;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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return v4l2_subdev_call(sd, core, g_register, p);
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}
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case VIDIOC_DBG_S_REGISTER:
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{
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struct v4l2_dbg_register *p = arg;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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return v4l2_subdev_call(sd, core, s_register, p);
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}
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case VIDIOC_DBG_G_CHIP_INFO:
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{
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struct v4l2_dbg_chip_info *p = arg;
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if (p->match.type != V4L2_CHIP_MATCH_SUBDEV || p->match.addr)
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return -EINVAL;
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if (sd->ops->core && sd->ops->core->s_register)
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p->flags |= V4L2_CHIP_FL_WRITABLE;
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if (sd->ops->core && sd->ops->core->g_register)
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p->flags |= V4L2_CHIP_FL_READABLE;
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strscpy(p->name, sd->name, sizeof(p->name));
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return 0;
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}
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#endif
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case VIDIOC_LOG_STATUS: {
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int ret;
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pr_info("%s: ================= START STATUS =================\n",
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sd->name);
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ret = v4l2_subdev_call(sd, core, log_status);
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pr_info("%s: ================== END STATUS ==================\n",
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sd->name);
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return ret;
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}
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#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
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case VIDIOC_SUBDEV_G_FMT: {
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struct v4l2_subdev_format *format = arg;
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memset(format->reserved, 0, sizeof(format->reserved));
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memset(format->format.reserved, 0, sizeof(format->format.reserved));
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return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh->pad, format);
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}
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case VIDIOC_SUBDEV_S_FMT: {
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struct v4l2_subdev_format *format = arg;
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memset(format->reserved, 0, sizeof(format->reserved));
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memset(format->format.reserved, 0, sizeof(format->format.reserved));
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return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh->pad, format);
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}
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case VIDIOC_SUBDEV_G_CROP: {
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struct v4l2_subdev_crop *crop = arg;
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struct v4l2_subdev_selection sel;
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memset(crop->reserved, 0, sizeof(crop->reserved));
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memset(&sel, 0, sizeof(sel));
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sel.which = crop->which;
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sel.pad = crop->pad;
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sel.target = V4L2_SEL_TGT_CROP;
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rval = v4l2_subdev_call(
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sd, pad, get_selection, subdev_fh->pad, &sel);
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crop->rect = sel.r;
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return rval;
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}
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|
case VIDIOC_SUBDEV_S_CROP: {
|
|
struct v4l2_subdev_crop *crop = arg;
|
|
struct v4l2_subdev_selection sel;
|
|
|
|
memset(crop->reserved, 0, sizeof(crop->reserved));
|
|
memset(&sel, 0, sizeof(sel));
|
|
sel.which = crop->which;
|
|
sel.pad = crop->pad;
|
|
sel.target = V4L2_SEL_TGT_CROP;
|
|
sel.r = crop->rect;
|
|
|
|
rval = v4l2_subdev_call(
|
|
sd, pad, set_selection, subdev_fh->pad, &sel);
|
|
|
|
crop->rect = sel.r;
|
|
|
|
return rval;
|
|
}
|
|
|
|
case VIDIOC_SUBDEV_ENUM_MBUS_CODE: {
|
|
struct v4l2_subdev_mbus_code_enum *code = arg;
|
|
|
|
memset(code->reserved, 0, sizeof(code->reserved));
|
|
return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh->pad,
|
|
code);
|
|
}
|
|
|
|
case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: {
|
|
struct v4l2_subdev_frame_size_enum *fse = arg;
|
|
|
|
memset(fse->reserved, 0, sizeof(fse->reserved));
|
|
return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh->pad,
|
|
fse);
|
|
}
|
|
|
|
case VIDIOC_SUBDEV_G_FRAME_INTERVAL: {
|
|
struct v4l2_subdev_frame_interval *fi = arg;
|
|
|
|
memset(fi->reserved, 0, sizeof(fi->reserved));
|
|
return v4l2_subdev_call(sd, video, g_frame_interval, arg);
|
|
}
|
|
|
|
case VIDIOC_SUBDEV_S_FRAME_INTERVAL: {
|
|
struct v4l2_subdev_frame_interval *fi = arg;
|
|
|
|
memset(fi->reserved, 0, sizeof(fi->reserved));
|
|
return v4l2_subdev_call(sd, video, s_frame_interval, arg);
|
|
}
|
|
|
|
case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: {
|
|
struct v4l2_subdev_frame_interval_enum *fie = arg;
|
|
|
|
memset(fie->reserved, 0, sizeof(fie->reserved));
|
|
return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh->pad,
|
|
fie);
|
|
}
|
|
|
|
case VIDIOC_SUBDEV_G_SELECTION: {
|
|
struct v4l2_subdev_selection *sel = arg;
|
|
|
|
memset(sel->reserved, 0, sizeof(sel->reserved));
|
|
return v4l2_subdev_call(
|
|
sd, pad, get_selection, subdev_fh->pad, sel);
|
|
}
|
|
|
|
case VIDIOC_SUBDEV_S_SELECTION: {
|
|
struct v4l2_subdev_selection *sel = arg;
|
|
|
|
memset(sel->reserved, 0, sizeof(sel->reserved));
|
|
return v4l2_subdev_call(
|
|
sd, pad, set_selection, subdev_fh->pad, sel);
|
|
}
|
|
|
|
case VIDIOC_G_EDID: {
|
|
struct v4l2_subdev_edid *edid = arg;
|
|
|
|
return v4l2_subdev_call(sd, pad, get_edid, edid);
|
|
}
|
|
|
|
case VIDIOC_S_EDID: {
|
|
struct v4l2_subdev_edid *edid = arg;
|
|
|
|
return v4l2_subdev_call(sd, pad, set_edid, edid);
|
|
}
|
|
|
|
case VIDIOC_SUBDEV_DV_TIMINGS_CAP: {
|
|
struct v4l2_dv_timings_cap *cap = arg;
|
|
|
|
return v4l2_subdev_call(sd, pad, dv_timings_cap, cap);
|
|
}
|
|
|
|
case VIDIOC_SUBDEV_ENUM_DV_TIMINGS: {
|
|
struct v4l2_enum_dv_timings *dvt = arg;
|
|
|
|
return v4l2_subdev_call(sd, pad, enum_dv_timings, dvt);
|
|
}
|
|
|
|
case VIDIOC_SUBDEV_QUERY_DV_TIMINGS:
|
|
return v4l2_subdev_call(sd, video, query_dv_timings, arg);
|
|
|
|
case VIDIOC_SUBDEV_G_DV_TIMINGS:
|
|
return v4l2_subdev_call(sd, video, g_dv_timings, arg);
|
|
|
|
case VIDIOC_SUBDEV_S_DV_TIMINGS:
|
|
return v4l2_subdev_call(sd, video, s_dv_timings, arg);
|
|
|
|
case VIDIOC_SUBDEV_G_STD:
|
|
return v4l2_subdev_call(sd, video, g_std, arg);
|
|
|
|
case VIDIOC_SUBDEV_S_STD: {
|
|
v4l2_std_id *std = arg;
|
|
|
|
return v4l2_subdev_call(sd, video, s_std, *std);
|
|
}
|
|
|
|
case VIDIOC_SUBDEV_ENUMSTD: {
|
|
struct v4l2_standard *p = arg;
|
|
v4l2_std_id id;
|
|
|
|
if (v4l2_subdev_call(sd, video, g_tvnorms, &id))
|
|
return -EINVAL;
|
|
|
|
return v4l_video_std_enumstd(p, id);
|
|
}
|
|
|
|
case VIDIOC_SUBDEV_QUERYSTD:
|
|
return v4l2_subdev_call(sd, video, querystd, arg);
|
|
#endif
|
|
default:
|
|
return v4l2_subdev_call(sd, core, ioctl, cmd, arg);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static long subdev_do_ioctl_lock(struct file *file, unsigned int cmd, void *arg)
|
|
{
|
|
struct video_device *vdev = video_devdata(file);
|
|
struct mutex *lock = vdev->lock;
|
|
long ret = -ENODEV;
|
|
|
|
if (lock && mutex_lock_interruptible(lock))
|
|
return -ERESTARTSYS;
|
|
if (video_is_registered(vdev))
|
|
ret = subdev_do_ioctl(file, cmd, arg);
|
|
if (lock)
|
|
mutex_unlock(lock);
|
|
return ret;
|
|
}
|
|
|
|
static long subdev_ioctl(struct file *file, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
return video_usercopy(file, cmd, arg, subdev_do_ioctl_lock);
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
static long subdev_compat_ioctl32(struct file *file, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
struct video_device *vdev = video_devdata(file);
|
|
struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
|
|
|
|
return v4l2_subdev_call(sd, core, compat_ioctl32, cmd, arg);
|
|
}
|
|
#endif
|
|
|
|
static __poll_t subdev_poll(struct file *file, poll_table *wait)
|
|
{
|
|
struct video_device *vdev = video_devdata(file);
|
|
struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
|
|
struct v4l2_fh *fh = file->private_data;
|
|
|
|
if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
|
|
return EPOLLERR;
|
|
|
|
poll_wait(file, &fh->wait, wait);
|
|
|
|
if (v4l2_event_pending(fh))
|
|
return EPOLLPRI;
|
|
|
|
return 0;
|
|
}
|
|
|
|
const struct v4l2_file_operations v4l2_subdev_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = subdev_open,
|
|
.unlocked_ioctl = subdev_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl32 = subdev_compat_ioctl32,
|
|
#endif
|
|
.release = subdev_close,
|
|
.poll = subdev_poll,
|
|
};
|
|
|
|
#ifdef CONFIG_MEDIA_CONTROLLER
|
|
int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd,
|
|
struct media_link *link,
|
|
struct v4l2_subdev_format *source_fmt,
|
|
struct v4l2_subdev_format *sink_fmt)
|
|
{
|
|
/* The width, height and code must match. */
|
|
if (source_fmt->format.width != sink_fmt->format.width
|
|
|| source_fmt->format.height != sink_fmt->format.height
|
|
|| source_fmt->format.code != sink_fmt->format.code)
|
|
return -EPIPE;
|
|
|
|
/* The field order must match, or the sink field order must be NONE
|
|
* to support interlaced hardware connected to bridges that support
|
|
* progressive formats only.
|
|
*/
|
|
if (source_fmt->format.field != sink_fmt->format.field &&
|
|
sink_fmt->format.field != V4L2_FIELD_NONE)
|
|
return -EPIPE;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate_default);
|
|
|
|
static int
|
|
v4l2_subdev_link_validate_get_format(struct media_pad *pad,
|
|
struct v4l2_subdev_format *fmt)
|
|
{
|
|
if (is_media_entity_v4l2_subdev(pad->entity)) {
|
|
struct v4l2_subdev *sd =
|
|
media_entity_to_v4l2_subdev(pad->entity);
|
|
|
|
fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE;
|
|
fmt->pad = pad->index;
|
|
return v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt);
|
|
}
|
|
|
|
WARN(pad->entity->function != MEDIA_ENT_F_IO_V4L,
|
|
"Driver bug! Wrong media entity type 0x%08x, entity %s\n",
|
|
pad->entity->function, pad->entity->name);
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
int v4l2_subdev_link_validate(struct media_link *link)
|
|
{
|
|
struct v4l2_subdev *sink;
|
|
struct v4l2_subdev_format sink_fmt, source_fmt;
|
|
int rval;
|
|
|
|
rval = v4l2_subdev_link_validate_get_format(
|
|
link->source, &source_fmt);
|
|
if (rval < 0)
|
|
return 0;
|
|
|
|
rval = v4l2_subdev_link_validate_get_format(
|
|
link->sink, &sink_fmt);
|
|
if (rval < 0)
|
|
return 0;
|
|
|
|
sink = media_entity_to_v4l2_subdev(link->sink->entity);
|
|
|
|
rval = v4l2_subdev_call(sink, pad, link_validate, link,
|
|
&source_fmt, &sink_fmt);
|
|
if (rval != -ENOIOCTLCMD)
|
|
return rval;
|
|
|
|
return v4l2_subdev_link_validate_default(
|
|
sink, link, &source_fmt, &sink_fmt);
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate);
|
|
|
|
struct v4l2_subdev_pad_config *
|
|
v4l2_subdev_alloc_pad_config(struct v4l2_subdev *sd)
|
|
{
|
|
struct v4l2_subdev_pad_config *cfg;
|
|
int ret;
|
|
|
|
if (!sd->entity.num_pads)
|
|
return NULL;
|
|
|
|
cfg = kvmalloc_array(sd->entity.num_pads, sizeof(*cfg),
|
|
GFP_KERNEL | __GFP_ZERO);
|
|
if (!cfg)
|
|
return NULL;
|
|
|
|
ret = v4l2_subdev_call(sd, pad, init_cfg, cfg);
|
|
if (ret < 0 && ret != -ENOIOCTLCMD) {
|
|
kvfree(cfg);
|
|
return NULL;
|
|
}
|
|
|
|
return cfg;
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_subdev_alloc_pad_config);
|
|
|
|
void v4l2_subdev_free_pad_config(struct v4l2_subdev_pad_config *cfg)
|
|
{
|
|
kvfree(cfg);
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_subdev_free_pad_config);
|
|
#endif /* CONFIG_MEDIA_CONTROLLER */
|
|
|
|
void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops)
|
|
{
|
|
INIT_LIST_HEAD(&sd->list);
|
|
BUG_ON(!ops);
|
|
sd->ops = ops;
|
|
sd->v4l2_dev = NULL;
|
|
sd->flags = 0;
|
|
sd->name[0] = '\0';
|
|
sd->grp_id = 0;
|
|
sd->dev_priv = NULL;
|
|
sd->host_priv = NULL;
|
|
#if defined(CONFIG_MEDIA_CONTROLLER)
|
|
sd->entity.name = sd->name;
|
|
sd->entity.obj_type = MEDIA_ENTITY_TYPE_V4L2_SUBDEV;
|
|
sd->entity.function = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN;
|
|
#endif
|
|
}
|
|
EXPORT_SYMBOL(v4l2_subdev_init);
|
|
|
|
void v4l2_subdev_notify_event(struct v4l2_subdev *sd,
|
|
const struct v4l2_event *ev)
|
|
{
|
|
v4l2_event_queue(sd->devnode, ev);
|
|
v4l2_subdev_notify(sd, V4L2_DEVICE_NOTIFY_EVENT, (void *)ev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_subdev_notify_event);
|