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Release 4.11 drivers/media/v4l2-core/v4l2-subdev.c

/*
 * V4L2 sub-device
 *
 * Copyright (C) 2010 Nokia Corporation
 *
 * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
 *          Sakari Ailus <sakari.ailus@iki.fi>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/ioctl.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/videodev2.h>
#include <linux/export.h>

#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-event.h>


static int subdev_fh_init(struct v4l2_subdev_fh *fh, struct v4l2_subdev *sd) { #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) if (sd->entity.num_pads) { fh->pad = v4l2_subdev_alloc_pad_config(sd); if (fh->pad == NULL) return -ENOMEM; } #endif return 0; }

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Stanimir Varbanov4577.59%133.33%
Laurent Pinchart1118.97%133.33%
Sakari Ailus23.45%133.33%
Total58100.00%3100.00%


static void subdev_fh_free(struct v4l2_subdev_fh *fh) { #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) v4l2_subdev_free_pad_config(fh->pad); fh->pad = NULL; #endif }

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Total32100.00%3100.00%


static int subdev_open(struct file *file) { struct video_device *vdev = video_devdata(file); struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); struct v4l2_subdev_fh *subdev_fh; #if defined(CONFIG_MEDIA_CONTROLLER) struct media_entity *entity = NULL; #endif int ret; subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL); if (subdev_fh == NULL) return -ENOMEM; ret = subdev_fh_init(subdev_fh, sd); if (ret) { kfree(subdev_fh); return ret; } v4l2_fh_init(&subdev_fh->vfh, vdev); v4l2_fh_add(&subdev_fh->vfh); file->private_data = &subdev_fh->vfh; #if defined(CONFIG_MEDIA_CONTROLLER) if (sd->v4l2_dev->mdev) { entity = media_entity_get(&sd->entity); if (!entity) { ret = -EBUSY; goto err; } } #endif if (sd->internal_ops && sd->internal_ops->open) { ret = sd->internal_ops->open(sd, subdev_fh); if (ret < 0) goto err; } return 0; err: #if defined(CONFIG_MEDIA_CONTROLLER) media_entity_put(entity); #endif v4l2_fh_del(&subdev_fh->vfh); v4l2_fh_exit(&subdev_fh->vfh); subdev_fh_free(subdev_fh); kfree(subdev_fh); return ret; }

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Total253100.00%5100.00%


static int subdev_close(struct file *file) { struct video_device *vdev = video_devdata(file); struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); struct v4l2_fh *vfh = file->private_data; struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh); if (sd->internal_ops && sd->internal_ops->close) sd->internal_ops->close(sd, subdev_fh); #if defined(CONFIG_MEDIA_CONTROLLER) if (sd->v4l2_dev->mdev) media_entity_put(&sd->entity); #endif v4l2_fh_del(vfh); v4l2_fh_exit(vfh); subdev_fh_free(subdev_fh); kfree(subdev_fh); file->private_data = NULL; return 0; }

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Laurent Pinchart8164.29%360.00%
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Stanimir Varbanov2217.46%120.00%
Total126100.00%5100.00%

#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
static int check_format(struct v4l2_subdev *sd, struct v4l2_subdev_format *format) { if (format->which != V4L2_SUBDEV_FORMAT_TRY && format->which != V4L2_SUBDEV_FORMAT_ACTIVE) return -EINVAL; if (format->pad >= sd->entity.num_pads) return -EINVAL; return 0; }

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static int check_crop(struct v4l2_subdev *sd, struct v4l2_subdev_crop *crop) { if (crop->which != V4L2_SUBDEV_FORMAT_TRY && crop->which != V4L2_SUBDEV_FORMAT_ACTIVE) return -EINVAL; if (crop->pad >= sd->entity.num_pads) return -EINVAL; return 0; }

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static int check_selection(struct v4l2_subdev *sd, struct v4l2_subdev_selection *sel) { if (sel->which != V4L2_SUBDEV_FORMAT_TRY && sel->which != V4L2_SUBDEV_FORMAT_ACTIVE) return -EINVAL; if (sel->pad >= sd->entity.num_pads) return -EINVAL; return 0; }

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static int check_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid) { if (edid->pad >= sd->entity.num_pads) return -EINVAL; if (edid->blocks && edid->edid == NULL) return -EINVAL; return 0; }

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#endif
static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg) { struct video_device *vdev = video_devdata(file); struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); struct v4l2_fh *vfh = file->private_data; #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh); int rval; #endif switch (cmd) { case VIDIOC_QUERYCTRL: return v4l2_queryctrl(vfh->ctrl_handler, arg); case VIDIOC_QUERY_EXT_CTRL: return v4l2_query_ext_ctrl(vfh->ctrl_handler, arg); case VIDIOC_QUERYMENU: return v4l2_querymenu(vfh->ctrl_handler, arg); case VIDIOC_G_CTRL: return v4l2_g_ctrl(vfh->ctrl_handler, arg); case VIDIOC_S_CTRL: return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg); case VIDIOC_G_EXT_CTRLS: return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg); case VIDIOC_S_EXT_CTRLS: return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg); case VIDIOC_TRY_EXT_CTRLS: return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg); case VIDIOC_DQEVENT: if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS)) return -ENOIOCTLCMD; return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK); case VIDIOC_SUBSCRIBE_EVENT: return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg); case VIDIOC_UNSUBSCRIBE_EVENT: return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg); #ifdef CONFIG_VIDEO_ADV_DEBUG case VIDIOC_DBG_G_REGISTER: { struct v4l2_dbg_register *p = arg; if (!capable(CAP_SYS_ADMIN)) return -EPERM; return v4l2_subdev_call(sd, core, g_register, p); } case VIDIOC_DBG_S_REGISTER: { struct v4l2_dbg_register *p = arg; if (!capable(CAP_SYS_ADMIN)) return -EPERM; return v4l2_subdev_call(sd, core, s_register, p); } #endif case VIDIOC_LOG_STATUS: { int ret; pr_info("%s: ================= START STATUS =================\n", sd->name); ret = v4l2_subdev_call(sd, core, log_status); pr_info("%s: ================== END STATUS ==================\n", sd->name); return ret; } #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) case VIDIOC_SUBDEV_G_FMT: { struct v4l2_subdev_format *format = arg; rval = check_format(sd, format); if (rval) return rval; return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh->pad, format); } case VIDIOC_SUBDEV_S_FMT: { struct v4l2_subdev_format *format = arg; rval = check_format(sd, format); if (rval) return rval; return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh->pad, format); } case VIDIOC_SUBDEV_G_CROP: { struct v4l2_subdev_crop *crop = arg; struct v4l2_subdev_selection sel; rval = check_crop(sd, crop); if (rval) return rval; memset(&sel, 0, sizeof(sel)); sel.which = crop->which; sel.pad = crop->pad; sel.target = V4L2_SEL_TGT_CROP; rval = v4l2_subdev_call( sd, pad, get_selection, subdev_fh->pad, &sel); crop->rect = sel.r; return rval; } case VIDIOC_SUBDEV_S_CROP: { struct v4l2_subdev_crop *crop = arg; struct v4l2_subdev_selection sel; rval = check_crop(sd, crop); if (rval) return rval; 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; if (code->which != V4L2_SUBDEV_FORMAT_TRY && code->which != V4L2_SUBDEV_FORMAT_ACTIVE) return -EINVAL; if (code->pad >= sd->entity.num_pads) return -EINVAL; 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; if (fse->which != V4L2_SUBDEV_FORMAT_TRY && fse->which != V4L2_SUBDEV_FORMAT_ACTIVE) return -EINVAL; if (fse->pad >= sd->entity.num_pads) return -EINVAL; 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; if (fi->pad >= sd->entity.num_pads) return -EINVAL; return v4l2_subdev_call(sd, video, g_frame_interval, arg); } case VIDIOC_SUBDEV_S_FRAME_INTERVAL: { struct v4l2_subdev_frame_interval *fi = arg; if (fi->pad >= sd->entity.num_pads) return -EINVAL; return v4l2_subdev_call(sd, video, s_frame_interval, arg); } case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: { struct v4l2_subdev_frame_interval_enum *fie = arg; if (fie->which != V4L2_SUBDEV_FORMAT_TRY && fie->which != V4L2_SUBDEV_FORMAT_ACTIVE) return -EINVAL; if (fie->pad >= sd->entity.num_pads) return -EINVAL; return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh->pad, fie); } case VIDIOC_SUBDEV_G_SELECTION: { struct v4l2_subdev_selection *sel = arg; rval = check_selection(sd, sel); if (rval) return rval; return v4l2_subdev_call( sd, pad, get_selection, subdev_fh->pad, sel); } case VIDIOC_SUBDEV_S_SELECTION: { struct v4l2_subdev_selection *sel = arg; rval = check_selection(sd, sel); if (rval) return rval; return v4l2_subdev_call( sd, pad, set_selection, subdev_fh->pad, sel); } case VIDIOC_G_EDID: { struct v4l2_subdev_edid *edid = arg; rval = check_edid(sd, edid); if (rval) return rval; return v4l2_subdev_call(sd, pad, get_edid, edid); } case VIDIOC_S_EDID: { struct v4l2_subdev_edid *edid = arg; rval = check_edid(sd, edid); if (rval) return rval; return v4l2_subdev_call(sd, pad, set_edid, edid); } case VIDIOC_SUBDEV_DV_TIMINGS_CAP: { struct v4l2_dv_timings_cap *cap = arg; if (cap->pad >= sd->entity.num_pads) return -EINVAL; return v4l2_subdev_call(sd, pad, dv_timings_cap, cap); } case VIDIOC_SUBDEV_ENUM_DV_TIMINGS: { struct v4l2_enum_dv_timings *dvt = arg; if (dvt->pad >= sd->entity.num_pads) return -EINVAL; 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); #endif default: return v4l2_subdev_call(sd, core, ioctl, cmd, arg); } return 0; }

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Laurent Pinchart52742.53%725.93%
Sakari Ailus40632.77%622.22%
Hans Verkuil17313.96%933.33%
Martin Hostettler776.21%13.70%
Antti Koskipaa383.07%13.70%
Sylwester Nawrocki120.97%13.70%
Stanimir Varbanov40.32%13.70%
Mauro Carvalho Chehab20.16%13.70%
Total1239100.00%27100.00%


static long subdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { return video_usercopy(file, cmd, arg, subdev_do_ioctl); }

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#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); }

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#endif
static unsigned int 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 POLLERR; poll_wait(file, &fh->wait, wait); if (v4l2_event_pending(fh)) return POLLPRI; return 0; }

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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; }

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Sakari Ailus6970.41%133.33%
Laurent Pinchart2727.55%133.33%
Helen Mae Koike Fornazier22.04%133.33%
Total98100.00%3100.00%

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; }

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Sakari Ailus7072.92%120.00%
Laurent Pinchart2222.92%120.00%
Mauro Carvalho Chehab44.17%360.00%
Total96100.00%5100.00%


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); }

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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 = kcalloc(sd->entity.num_pads, sizeof(*cfg), GFP_KERNEL); if (!cfg) return NULL; ret = v4l2_subdev_call(sd, pad, init_cfg, cfg); if (ret < 0 && ret != -ENOIOCTLCMD) { kfree(cfg); return NULL; } return cfg; }

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EXPORT_SYMBOL_GPL(v4l2_subdev_alloc_pad_config);
void v4l2_subdev_free_pad_config(struct v4l2_subdev_pad_config *cfg) { kfree(cfg); }

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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 }

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Laurent Pinchart10798.17%360.00%
Mauro Carvalho Chehab21.83%240.00%
Total109100.00%5100.00%

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); }

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EXPORT_SYMBOL_GPL(v4l2_subdev_notify_event);

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Laurent Pinchart110239.64%1432.56%
Sakari Ailus109639.42%818.60%
Hans Verkuil2418.67%1023.26%
Stanimir Varbanov1505.40%12.33%
Martin Hostettler772.77%12.33%
Lars-Peter Clausen431.55%12.33%
Antti Koskipaa381.37%12.33%
Mauro Carvalho Chehab160.58%49.30%
Sylwester Nawrocki120.43%12.33%
Paul Gortmaker30.11%12.33%
Helen Mae Koike Fornazier20.07%12.33%
Total2780100.00%43100.00%
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