diff options
Diffstat (limited to 'drivers/media/v4l2-core/v4l2-subdev.c')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-subdev.c | 2487 |
1 files changed, 2325 insertions, 162 deletions
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index 996c248dea42..25e66bf18f5f 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * V4L2 sub-device * @@ -5,49 +6,90 @@ * * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ +#include <linux/export.h> #include <linux/ioctl.h> +#include <linux/leds.h> +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/overflow.h> #include <linux/slab.h> +#include <linux/string.h> #include <linux/types.h> +#include <linux/version.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> +#include <media/v4l2-fh.h> +#include <media/v4l2-ioctl.h> + +/** + * struct v4l2_subdev_stream_config - Used for storing stream configuration. + * + * @pad: pad number + * @stream: stream number + * @enabled: has the stream been enabled with v4l2_subdev_enable_streams() + * @fmt: &struct v4l2_mbus_framefmt + * @crop: &struct v4l2_rect to be used for crop + * @compose: &struct v4l2_rect to be used for compose + * @interval: frame interval + * + * This structure stores configuration for a stream. + */ +struct v4l2_subdev_stream_config { + u32 pad; + u32 stream; + bool enabled; + + struct v4l2_mbus_framefmt fmt; + struct v4l2_rect crop; + struct v4l2_rect compose; + struct v4l2_fract interval; +}; -static int subdev_fh_init(struct v4l2_subdev_fh *fh, struct v4l2_subdev *sd) -{ #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) - fh->pad = kzalloc(sizeof(*fh->pad) * sd->entity.num_pads, GFP_KERNEL); - if (fh->pad == NULL) - return -ENOMEM; +/* + * The Streams API is an experimental feature. To use the Streams API, set + * 'v4l2_subdev_enable_streams_api' to 1 below. + */ + +static bool v4l2_subdev_enable_streams_api; #endif + +/* + * Maximum stream ID is 63 for now, as we use u64 bitmask to represent a set + * of streams. + * + * Note that V4L2_FRAME_DESC_ENTRY_MAX is related: V4L2_FRAME_DESC_ENTRY_MAX + * restricts the total number of streams in a pad, although the stream ID is + * not restricted. + */ +#define V4L2_SUBDEV_MAX_STREAM_ID 63 + +#include "v4l2-subdev-priv.h" + +#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) +static int subdev_fh_init(struct v4l2_subdev_fh *fh, struct v4l2_subdev *sd) +{ + struct v4l2_subdev_state *state; + static struct lock_class_key key; + + state = __v4l2_subdev_state_alloc(sd, "fh->state->lock", &key); + if (IS_ERR(state)) + return PTR_ERR(state); + + fh->state = state; + return 0; } static void subdev_fh_free(struct v4l2_subdev_fh *fh) { -#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) - kfree(fh->pad); - fh->pad = NULL; -#endif + __v4l2_subdev_state_free(fh->state); + fh->state = NULL; } static int subdev_open(struct file *file) @@ -55,9 +97,6 @@ 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); @@ -71,17 +110,18 @@ static int subdev_open(struct file *file) } 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) { + v4l2_fh_add(&subdev_fh->vfh, file); + + if (sd->v4l2_dev->mdev && sd->entity.graph_obj.mdev->dev) { + struct module *owner; + + owner = sd->entity.graph_obj.mdev->dev->driver->owner; + if (!try_module_get(owner)) { ret = -EBUSY; goto err; } + subdev_fh->owner = owner; } -#endif if (sd->internal_ops && sd->internal_ops->open) { ret = sd->internal_ops->open(sd, subdev_fh); @@ -92,11 +132,8 @@ static int subdev_open(struct file *file) return 0; err: -#if defined(CONFIG_MEDIA_CONTROLLER) - if (entity) - media_entity_put(entity); -#endif - v4l2_fh_del(&subdev_fh->vfh); + module_put(subdev_fh->owner); + v4l2_fh_del(&subdev_fh->vfh, file); v4l2_fh_exit(&subdev_fh->vfh); subdev_fh_free(subdev_fh); kfree(subdev_fh); @@ -108,54 +145,573 @@ 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_fh *vfh = file_to_v4l2_fh(file); 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); + module_put(subdev_fh->owner); + v4l2_fh_del(vfh, file); v4l2_fh_exit(vfh); subdev_fh_free(subdev_fh); kfree(subdev_fh); - file->private_data = NULL; return 0; } +#else /* CONFIG_VIDEO_V4L2_SUBDEV_API */ +static int subdev_open(struct file *file) +{ + return -ENODEV; +} + +static int subdev_close(struct file *file) +{ + return -ENODEV; +} +#endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */ + +static void v4l2_subdev_enable_privacy_led(struct v4l2_subdev *sd) +{ +#if IS_REACHABLE(CONFIG_LEDS_CLASS) + if (!IS_ERR_OR_NULL(sd->privacy_led)) + led_set_brightness(sd->privacy_led, + sd->privacy_led->max_brightness); +#endif +} + +static void v4l2_subdev_disable_privacy_led(struct v4l2_subdev *sd) +{ +#if IS_REACHABLE(CONFIG_LEDS_CLASS) + if (!IS_ERR_OR_NULL(sd->privacy_led)) + led_set_brightness(sd->privacy_led, 0); +#endif +} + +static inline int check_which(u32 which) +{ + if (which != V4L2_SUBDEV_FORMAT_TRY && + which != V4L2_SUBDEV_FORMAT_ACTIVE) + return -EINVAL; + + return 0; +} + +static inline int check_pad(struct v4l2_subdev *sd, u32 pad) +{ +#if defined(CONFIG_MEDIA_CONTROLLER) + if (sd->entity.num_pads) { + if (pad >= sd->entity.num_pads) + return -EINVAL; + return 0; + } +#endif + /* allow pad 0 on subdevices not registered as media entities */ + if (pad > 0) + return -EINVAL; + return 0; +} + +static int check_state(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, + u32 which, u32 pad, u32 stream) +{ + if (sd->flags & V4L2_SUBDEV_FL_STREAMS) { +#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) + if (!v4l2_subdev_state_get_format(state, pad, stream)) + return -EINVAL; + return 0; +#else + return -EINVAL; +#endif + } + + if (stream != 0) + return -EINVAL; + + if (which == V4L2_SUBDEV_FORMAT_TRY && (!state || !state->pads)) + return -EINVAL; + + return 0; +} + +static inline int check_format(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_format *format) +{ + if (!format) + return -EINVAL; + + return check_which(format->which) ? : check_pad(sd, format->pad) ? : + check_state(sd, state, format->which, format->pad, format->stream); +} + +static int call_get_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_format *format) +{ + return check_format(sd, state, format) ? : + sd->ops->pad->get_fmt(sd, state, format); +} -static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg) +static int call_set_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_format *format) +{ + return check_format(sd, state, format) ? : + sd->ops->pad->set_fmt(sd, state, format); +} + +static int call_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_mbus_code_enum *code) +{ + if (!code) + return -EINVAL; + + return check_which(code->which) ? : check_pad(sd, code->pad) ? : + check_state(sd, state, code->which, code->pad, code->stream) ? : + sd->ops->pad->enum_mbus_code(sd, state, code); +} + +static int call_enum_frame_size(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_frame_size_enum *fse) +{ + if (!fse) + return -EINVAL; + + return check_which(fse->which) ? : check_pad(sd, fse->pad) ? : + check_state(sd, state, fse->which, fse->pad, fse->stream) ? : + sd->ops->pad->enum_frame_size(sd, state, fse); +} + +static int call_enum_frame_interval(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_frame_interval_enum *fie) +{ + if (!fie) + return -EINVAL; + + return check_which(fie->which) ? : check_pad(sd, fie->pad) ? : + check_state(sd, state, fie->which, fie->pad, fie->stream) ? : + sd->ops->pad->enum_frame_interval(sd, state, fie); +} + +static inline int check_selection(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_selection *sel) +{ + if (!sel) + return -EINVAL; + + return check_which(sel->which) ? : check_pad(sd, sel->pad) ? : + check_state(sd, state, sel->which, sel->pad, sel->stream); +} + +static int call_get_selection(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_selection *sel) +{ + return check_selection(sd, state, sel) ? : + sd->ops->pad->get_selection(sd, state, sel); +} + +static int call_set_selection(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_selection *sel) +{ + return check_selection(sd, state, sel) ? : + sd->ops->pad->set_selection(sd, state, sel); +} + +static inline int check_frame_interval(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_frame_interval *fi) +{ + if (!fi) + return -EINVAL; + + return check_which(fi->which) ? : check_pad(sd, fi->pad) ? : + check_state(sd, state, fi->which, fi->pad, fi->stream); +} + +static int call_get_frame_interval(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_frame_interval *fi) +{ + return check_frame_interval(sd, state, fi) ? : + sd->ops->pad->get_frame_interval(sd, state, fi); +} + +static int call_set_frame_interval(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_frame_interval *fi) +{ + return check_frame_interval(sd, state, fi) ? : + sd->ops->pad->set_frame_interval(sd, state, fi); +} + +static int call_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad, + struct v4l2_mbus_frame_desc *fd) +{ + unsigned int i; + int ret; + +#if defined(CONFIG_MEDIA_CONTROLLER) + if (!(sd->entity.pads[pad].flags & MEDIA_PAD_FL_SOURCE)) + return -EOPNOTSUPP; +#endif + + memset(fd, 0, sizeof(*fd)); + + ret = sd->ops->pad->get_frame_desc(sd, pad, fd); + if (ret) + return ret; + + dev_dbg(sd->dev, "Frame descriptor on pad %u, type %s\n", pad, + fd->type == V4L2_MBUS_FRAME_DESC_TYPE_PARALLEL ? "parallel" : + fd->type == V4L2_MBUS_FRAME_DESC_TYPE_CSI2 ? "CSI-2" : + "unknown"); + + for (i = 0; i < fd->num_entries; i++) { + struct v4l2_mbus_frame_desc_entry *entry = &fd->entry[i]; + char buf[20] = ""; + + if (fd->type == V4L2_MBUS_FRAME_DESC_TYPE_CSI2) + WARN_ON(snprintf(buf, sizeof(buf), + ", vc %u, dt 0x%02x", + entry->bus.csi2.vc, + entry->bus.csi2.dt) >= sizeof(buf)); + + dev_dbg(sd->dev, + "\tstream %u, code 0x%04x, length %u, flags 0x%04x%s\n", + entry->stream, entry->pixelcode, entry->length, + entry->flags, buf); + } + + return 0; +} + +static inline int check_edid(struct v4l2_subdev *sd, + struct v4l2_subdev_edid *edid) +{ + if (!edid) + return -EINVAL; + + if (edid->blocks && edid->edid == NULL) + return -EINVAL; + + return check_pad(sd, edid->pad); +} + +static int call_get_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid) +{ + return check_edid(sd, edid) ? : sd->ops->pad->get_edid(sd, edid); +} + +static int call_set_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid) +{ + return check_edid(sd, edid) ? : sd->ops->pad->set_edid(sd, edid); +} + +static int call_s_dv_timings(struct v4l2_subdev *sd, unsigned int pad, + struct v4l2_dv_timings *timings) +{ + if (!timings) + return -EINVAL; + + return check_pad(sd, pad) ? : + sd->ops->pad->s_dv_timings(sd, pad, timings); +} + +static int call_g_dv_timings(struct v4l2_subdev *sd, unsigned int pad, + struct v4l2_dv_timings *timings) +{ + if (!timings) + return -EINVAL; + + return check_pad(sd, pad) ? : + sd->ops->pad->g_dv_timings(sd, pad, timings); +} + +static int call_query_dv_timings(struct v4l2_subdev *sd, unsigned int pad, + struct v4l2_dv_timings *timings) +{ + if (!timings) + return -EINVAL; + + return check_pad(sd, pad) ? : + sd->ops->pad->query_dv_timings(sd, pad, timings); +} + +static int call_dv_timings_cap(struct v4l2_subdev *sd, + struct v4l2_dv_timings_cap *cap) +{ + if (!cap) + return -EINVAL; + + return check_pad(sd, cap->pad) ? : + sd->ops->pad->dv_timings_cap(sd, cap); +} + +static int call_enum_dv_timings(struct v4l2_subdev *sd, + struct v4l2_enum_dv_timings *dvt) +{ + if (!dvt) + return -EINVAL; + + return check_pad(sd, dvt->pad) ? : + sd->ops->pad->enum_dv_timings(sd, dvt); +} + +static int call_get_mbus_config(struct v4l2_subdev *sd, unsigned int pad, + struct v4l2_mbus_config *config) +{ + memset(config, 0, sizeof(*config)); + + return check_pad(sd, pad) ? : + sd->ops->pad->get_mbus_config(sd, pad, config); +} + +static int call_s_stream(struct v4l2_subdev *sd, int enable) +{ + int ret; + + /* + * The .s_stream() operation must never be called to start or stop an + * already started or stopped subdev. Catch offenders but don't return + * an error yet to avoid regressions. + */ + if (WARN_ON(sd->s_stream_enabled == !!enable)) + return 0; + + ret = sd->ops->video->s_stream(sd, enable); + + if (!enable && ret < 0) { + dev_warn(sd->dev, "disabling streaming failed (%d)\n", ret); + ret = 0; + } + + if (!ret) { + sd->s_stream_enabled = enable; + + if (enable) + v4l2_subdev_enable_privacy_led(sd); + else + v4l2_subdev_disable_privacy_led(sd); + } + + return ret; +} + +#ifdef CONFIG_MEDIA_CONTROLLER +/* + * Create state-management wrapper for pad ops dealing with subdev state. The + * wrapper handles the case where the caller does not provide the called + * subdev's state. This should be removed when all the callers are fixed. + */ +#define DEFINE_STATE_WRAPPER(f, arg_type) \ + static int call_##f##_state(struct v4l2_subdev *sd, \ + struct v4l2_subdev_state *_state, \ + arg_type *arg) \ + { \ + struct v4l2_subdev_state *state = _state; \ + int ret; \ + if (!_state) \ + state = v4l2_subdev_lock_and_get_active_state(sd); \ + ret = call_##f(sd, state, arg); \ + if (!_state && state) \ + v4l2_subdev_unlock_state(state); \ + return ret; \ + } + +#else /* CONFIG_MEDIA_CONTROLLER */ + +#define DEFINE_STATE_WRAPPER(f, arg_type) \ + static int call_##f##_state(struct v4l2_subdev *sd, \ + struct v4l2_subdev_state *state, \ + arg_type *arg) \ + { \ + return call_##f(sd, state, arg); \ + } + +#endif /* CONFIG_MEDIA_CONTROLLER */ + +DEFINE_STATE_WRAPPER(get_fmt, struct v4l2_subdev_format); +DEFINE_STATE_WRAPPER(set_fmt, struct v4l2_subdev_format); +DEFINE_STATE_WRAPPER(enum_mbus_code, struct v4l2_subdev_mbus_code_enum); +DEFINE_STATE_WRAPPER(enum_frame_size, struct v4l2_subdev_frame_size_enum); +DEFINE_STATE_WRAPPER(enum_frame_interval, struct v4l2_subdev_frame_interval_enum); +DEFINE_STATE_WRAPPER(get_selection, struct v4l2_subdev_selection); +DEFINE_STATE_WRAPPER(set_selection, struct v4l2_subdev_selection); + +static const struct v4l2_subdev_pad_ops v4l2_subdev_call_pad_wrappers = { + .get_fmt = call_get_fmt_state, + .set_fmt = call_set_fmt_state, + .enum_mbus_code = call_enum_mbus_code_state, + .enum_frame_size = call_enum_frame_size_state, + .enum_frame_interval = call_enum_frame_interval_state, + .get_selection = call_get_selection_state, + .set_selection = call_set_selection_state, + .get_frame_interval = call_get_frame_interval, + .set_frame_interval = call_set_frame_interval, + .get_edid = call_get_edid, + .set_edid = call_set_edid, + .s_dv_timings = call_s_dv_timings, + .g_dv_timings = call_g_dv_timings, + .query_dv_timings = call_query_dv_timings, + .dv_timings_cap = call_dv_timings_cap, + .enum_dv_timings = call_enum_dv_timings, + .get_frame_desc = call_get_frame_desc, + .get_mbus_config = call_get_mbus_config, +}; + +static const struct v4l2_subdev_video_ops v4l2_subdev_call_video_wrappers = { + .s_stream = call_s_stream, +}; + +const struct v4l2_subdev_ops v4l2_subdev_call_wrappers = { + .pad = &v4l2_subdev_call_pad_wrappers, + .video = &v4l2_subdev_call_video_wrappers, +}; +EXPORT_SYMBOL(v4l2_subdev_call_wrappers); + +#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) + +static struct v4l2_subdev_state * +subdev_ioctl_get_state(struct v4l2_subdev *sd, struct v4l2_subdev_fh *subdev_fh, + unsigned int cmd, void *arg) +{ + u32 which; + + switch (cmd) { + default: + return NULL; + case VIDIOC_SUBDEV_G_FMT: + case VIDIOC_SUBDEV_S_FMT: + which = ((struct v4l2_subdev_format *)arg)->which; + break; + case VIDIOC_SUBDEV_G_CROP: + case VIDIOC_SUBDEV_S_CROP: + which = ((struct v4l2_subdev_crop *)arg)->which; + break; + case VIDIOC_SUBDEV_ENUM_MBUS_CODE: + which = ((struct v4l2_subdev_mbus_code_enum *)arg)->which; + break; + case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: + which = ((struct v4l2_subdev_frame_size_enum *)arg)->which; + break; + case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: + which = ((struct v4l2_subdev_frame_interval_enum *)arg)->which; + break; + case VIDIOC_SUBDEV_G_SELECTION: + case VIDIOC_SUBDEV_S_SELECTION: + which = ((struct v4l2_subdev_selection *)arg)->which; + break; + case VIDIOC_SUBDEV_G_FRAME_INTERVAL: + case VIDIOC_SUBDEV_S_FRAME_INTERVAL: { + struct v4l2_subdev_frame_interval *fi = arg; + + if (!(subdev_fh->client_caps & + V4L2_SUBDEV_CLIENT_CAP_INTERVAL_USES_WHICH)) + fi->which = V4L2_SUBDEV_FORMAT_ACTIVE; + + which = fi->which; + break; + } + case VIDIOC_SUBDEV_G_ROUTING: + case VIDIOC_SUBDEV_S_ROUTING: + which = ((struct v4l2_subdev_routing *)arg)->which; + break; + } + + return which == V4L2_SUBDEV_FORMAT_TRY ? + subdev_fh->state : + v4l2_subdev_get_unlocked_active_state(sd); +} + +static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg, + struct v4l2_subdev_state *state) { 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_fh *vfh = file_to_v4l2_fh(file); struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh); -#endif + bool ro_subdev = test_bit(V4L2_FL_SUBDEV_RO_DEVNODE, &vdev->flags); + bool streams_subdev = sd->flags & V4L2_SUBDEV_FL_STREAMS; + bool client_supports_streams = subdev_fh->client_caps & + V4L2_SUBDEV_CLIENT_CAP_STREAMS; + int rval; + + /* + * If the streams API is not enabled, remove V4L2_SUBDEV_CAP_STREAMS. + * Remove this when the API is no longer experimental. + */ + if (!v4l2_subdev_enable_streams_api) + streams_subdev = false; switch (cmd) { + case VIDIOC_SUBDEV_QUERYCAP: { + struct v4l2_subdev_capability *cap = arg; + + memset(cap->reserved, 0, sizeof(cap->reserved)); + cap->version = LINUX_VERSION_CODE; + cap->capabilities = + (ro_subdev ? V4L2_SUBDEV_CAP_RO_SUBDEV : 0) | + (streams_subdev ? V4L2_SUBDEV_CAP_STREAMS : 0); + + return 0; + } + case VIDIOC_QUERYCTRL: + /* + * TODO: this really should be folded into v4l2_queryctrl (this + * currently returns -EINVAL for NULL control handlers). + * However, v4l2_queryctrl() is still called directly by + * drivers as well and until that has been addressed I believe + * it is safer to do the check here. The same is true for the + * other control ioctls below. + */ + if (!vfh->ctrl_handler) + return -ENOTTY; return v4l2_queryctrl(vfh->ctrl_handler, arg); + case VIDIOC_QUERY_EXT_CTRL: + if (!vfh->ctrl_handler) + return -ENOTTY; + return v4l2_query_ext_ctrl(vfh->ctrl_handler, arg); + case VIDIOC_QUERYMENU: + if (!vfh->ctrl_handler) + return -ENOTTY; return v4l2_querymenu(vfh->ctrl_handler, arg); case VIDIOC_G_CTRL: + if (!vfh->ctrl_handler) + return -ENOTTY; return v4l2_g_ctrl(vfh->ctrl_handler, arg); case VIDIOC_S_CTRL: + if (!vfh->ctrl_handler) + return -ENOTTY; return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg); case VIDIOC_G_EXT_CTRLS: - return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg); + if (!vfh->ctrl_handler) + return -ENOTTY; + return v4l2_g_ext_ctrls(vfh->ctrl_handler, + vdev, sd->v4l2_dev->mdev, arg); case VIDIOC_S_EXT_CTRLS: - return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg); + if (!vfh->ctrl_handler) + return -ENOTTY; + return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, + vdev, sd->v4l2_dev->mdev, arg); case VIDIOC_TRY_EXT_CTRLS: - return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg); + if (!vfh->ctrl_handler) + return -ENOTTY; + return v4l2_try_ext_ctrls(vfh->ctrl_handler, + vdev, sd->v4l2_dev->mdev, arg); case VIDIOC_DQEVENT: if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS)) @@ -164,10 +720,25 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg) 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); + if (v4l2_subdev_has_op(sd, core, subscribe_event)) + return v4l2_subdev_call(sd, core, subscribe_event, + vfh, arg); + + if ((sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS) && + vfh->ctrl_handler) + return v4l2_ctrl_subdev_subscribe_event(sd, vfh, arg); + + return -ENOIOCTLCMD; case VIDIOC_UNSUBSCRIBE_EVENT: - return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg); + if (v4l2_subdev_has_op(sd, core, unsubscribe_event)) + return v4l2_subdev_call(sd, core, unsubscribe_event, + vfh, arg); + + if (sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS) + return v4l2_event_subdev_unsubscribe(sd, vfh, arg); + + return -ENOIOCTLCMD; #ifdef CONFIG_VIDEO_ADV_DEBUG case VIDIOC_DBG_G_REGISTER: @@ -186,6 +757,19 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg) return -EPERM; return v4l2_subdev_call(sd, core, s_register, p); } + case VIDIOC_DBG_G_CHIP_INFO: + { + struct v4l2_dbg_chip_info *p = arg; + + if (p->match.type != V4L2_CHIP_MATCH_SUBDEV || p->match.addr) + return -EINVAL; + if (sd->ops->core && sd->ops->core->s_register) + p->flags |= V4L2_CHIP_FL_WRITABLE; + if (sd->ops->core && sd->ops->core->g_register) + p->flags |= V4L2_CHIP_FL_READABLE; + strscpy(p->name, sd->name, sizeof(p->name)); + return 0; + } #endif case VIDIOC_LOG_STATUS: { @@ -199,56 +783,47 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg) return ret; } -#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) case VIDIOC_SUBDEV_G_FMT: { struct v4l2_subdev_format *format = arg; - if (format->which != V4L2_SUBDEV_FORMAT_TRY && - format->which != V4L2_SUBDEV_FORMAT_ACTIVE) - return -EINVAL; + if (!client_supports_streams) + format->stream = 0; - if (format->pad >= sd->entity.num_pads) - return -EINVAL; - - return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh, format); + memset(format->reserved, 0, sizeof(format->reserved)); + memset(format->format.reserved, 0, sizeof(format->format.reserved)); + return v4l2_subdev_call(sd, pad, get_fmt, state, format); } case VIDIOC_SUBDEV_S_FMT: { struct v4l2_subdev_format *format = arg; - if (format->which != V4L2_SUBDEV_FORMAT_TRY && - format->which != V4L2_SUBDEV_FORMAT_ACTIVE) - return -EINVAL; + if (format->which != V4L2_SUBDEV_FORMAT_TRY && ro_subdev) + return -EPERM; - if (format->pad >= sd->entity.num_pads) - return -EINVAL; + if (!client_supports_streams) + format->stream = 0; - return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh, format); + memset(format->reserved, 0, sizeof(format->reserved)); + memset(format->format.reserved, 0, sizeof(format->format.reserved)); + return v4l2_subdev_call(sd, pad, set_fmt, state, format); } case VIDIOC_SUBDEV_G_CROP: { struct v4l2_subdev_crop *crop = arg; struct v4l2_subdev_selection sel; - int rval; - if (crop->which != V4L2_SUBDEV_FORMAT_TRY && - crop->which != V4L2_SUBDEV_FORMAT_ACTIVE) - return -EINVAL; - - if (crop->pad >= sd->entity.num_pads) - return -EINVAL; - - rval = v4l2_subdev_call(sd, pad, get_crop, subdev_fh, crop); - if (rval != -ENOIOCTLCMD) - return rval; + if (!client_supports_streams) + crop->stream = 0; + memset(crop->reserved, 0, sizeof(crop->reserved)); memset(&sel, 0, sizeof(sel)); sel.which = crop->which; sel.pad = crop->pad; + sel.stream = crop->stream; sel.target = V4L2_SEL_TGT_CROP; rval = v4l2_subdev_call( - sd, pad, get_selection, subdev_fh, &sel); + sd, pad, get_selection, state, &sel); crop->rect = sel.r; @@ -258,27 +833,23 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg) case VIDIOC_SUBDEV_S_CROP: { struct v4l2_subdev_crop *crop = arg; struct v4l2_subdev_selection sel; - int rval; - if (crop->which != V4L2_SUBDEV_FORMAT_TRY && - crop->which != V4L2_SUBDEV_FORMAT_ACTIVE) - return -EINVAL; - - if (crop->pad >= sd->entity.num_pads) - return -EINVAL; + if (crop->which != V4L2_SUBDEV_FORMAT_TRY && ro_subdev) + return -EPERM; - rval = v4l2_subdev_call(sd, pad, set_crop, subdev_fh, crop); - if (rval != -ENOIOCTLCMD) - return rval; + if (!client_supports_streams) + crop->stream = 0; + memset(crop->reserved, 0, sizeof(crop->reserved)); memset(&sel, 0, sizeof(sel)); sel.which = crop->which; sel.pad = crop->pad; + sel.stream = crop->stream; sel.target = V4L2_SEL_TGT_CROP; sel.r = crop->rect; rval = v4l2_subdev_call( - sd, pad, set_selection, subdev_fh, &sel); + sd, pad, set_selection, state, &sel); crop->rect = sel.r; @@ -288,73 +859,286 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg) case VIDIOC_SUBDEV_ENUM_MBUS_CODE: { struct v4l2_subdev_mbus_code_enum *code = arg; - if (code->pad >= sd->entity.num_pads) - return -EINVAL; + if (!client_supports_streams) + code->stream = 0; - return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh, + memset(code->reserved, 0, sizeof(code->reserved)); + return v4l2_subdev_call(sd, pad, enum_mbus_code, state, code); } case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: { struct v4l2_subdev_frame_size_enum *fse = arg; - if (fse->pad >= sd->entity.num_pads) - return -EINVAL; + if (!client_supports_streams) + fse->stream = 0; - return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh, + memset(fse->reserved, 0, sizeof(fse->reserved)); + return v4l2_subdev_call(sd, pad, enum_frame_size, state, fse); } - case VIDIOC_SUBDEV_G_FRAME_INTERVAL: - return v4l2_subdev_call(sd, video, g_frame_interval, arg); + case VIDIOC_SUBDEV_G_FRAME_INTERVAL: { + struct v4l2_subdev_frame_interval *fi = arg; + + if (!client_supports_streams) + fi->stream = 0; - case VIDIOC_SUBDEV_S_FRAME_INTERVAL: - return v4l2_subdev_call(sd, video, s_frame_interval, arg); + memset(fi->reserved, 0, sizeof(fi->reserved)); + return v4l2_subdev_call(sd, pad, get_frame_interval, state, fi); + } + + case VIDIOC_SUBDEV_S_FRAME_INTERVAL: { + struct v4l2_subdev_frame_interval *fi = arg; + + if (!client_supports_streams) + fi->stream = 0; + + if (fi->which != V4L2_SUBDEV_FORMAT_TRY && ro_subdev) + return -EPERM; + + memset(fi->reserved, 0, sizeof(fi->reserved)); + return v4l2_subdev_call(sd, pad, set_frame_interval, state, fi); + } case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: { struct v4l2_subdev_frame_interval_enum *fie = arg; - if (fie->pad >= sd->entity.num_pads) - return -EINVAL; + if (!client_supports_streams) + fie->stream = 0; - return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh, + memset(fie->reserved, 0, sizeof(fie->reserved)); + return v4l2_subdev_call(sd, pad, enum_frame_interval, state, fie); } case VIDIOC_SUBDEV_G_SELECTION: { struct v4l2_subdev_selection *sel = arg; - if (sel->which != V4L2_SUBDEV_FORMAT_TRY && - sel->which != V4L2_SUBDEV_FORMAT_ACTIVE) - return -EINVAL; - - if (sel->pad >= sd->entity.num_pads) - return -EINVAL; + if (!client_supports_streams) + sel->stream = 0; + memset(sel->reserved, 0, sizeof(sel->reserved)); return v4l2_subdev_call( - sd, pad, get_selection, subdev_fh, sel); + sd, pad, get_selection, state, sel); } case VIDIOC_SUBDEV_S_SELECTION: { struct v4l2_subdev_selection *sel = arg; - if (sel->which != V4L2_SUBDEV_FORMAT_TRY && - sel->which != V4L2_SUBDEV_FORMAT_ACTIVE) + if (sel->which != V4L2_SUBDEV_FORMAT_TRY && ro_subdev) + return -EPERM; + + if (!client_supports_streams) + sel->stream = 0; + + memset(sel->reserved, 0, sizeof(sel->reserved)); + return v4l2_subdev_call( + sd, pad, set_selection, state, 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, pad, query_dv_timings, 0, arg); + + case VIDIOC_SUBDEV_G_DV_TIMINGS: + return v4l2_subdev_call(sd, pad, g_dv_timings, 0, arg); + + case VIDIOC_SUBDEV_S_DV_TIMINGS: + if (ro_subdev) + return -EPERM; + + return v4l2_subdev_call(sd, pad, s_dv_timings, 0, 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; + + if (ro_subdev) + return -EPERM; + + 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; - if (sel->pad >= sd->entity.num_pads) + return v4l_video_std_enumstd(p, id); + } + + case VIDIOC_SUBDEV_QUERYSTD: + return v4l2_subdev_call(sd, video, querystd, arg); + + case VIDIOC_SUBDEV_G_ROUTING: { + struct v4l2_subdev_routing *routing = arg; + struct v4l2_subdev_krouting *krouting; + + if (!v4l2_subdev_enable_streams_api) + return -ENOIOCTLCMD; + + if (!(sd->flags & V4L2_SUBDEV_FL_STREAMS)) + return -ENOIOCTLCMD; + + memset(routing->reserved, 0, sizeof(routing->reserved)); + + krouting = &state->routing; + + memcpy((struct v4l2_subdev_route *)(uintptr_t)routing->routes, + krouting->routes, + min(krouting->num_routes, routing->len_routes) * + sizeof(*krouting->routes)); + routing->num_routes = krouting->num_routes; + + return 0; + } + + case VIDIOC_SUBDEV_S_ROUTING: { + struct v4l2_subdev_routing *routing = arg; + struct v4l2_subdev_route *routes = + (struct v4l2_subdev_route *)(uintptr_t)routing->routes; + struct v4l2_subdev_krouting krouting = {}; + unsigned int num_active_routes = 0; + unsigned int i; + + if (!v4l2_subdev_enable_streams_api) + return -ENOIOCTLCMD; + + if (!(sd->flags & V4L2_SUBDEV_FL_STREAMS)) + return -ENOIOCTLCMD; + + if (routing->which != V4L2_SUBDEV_FORMAT_TRY && ro_subdev) + return -EPERM; + + if (routing->num_routes > routing->len_routes) return -EINVAL; - return v4l2_subdev_call( - sd, pad, set_selection, subdev_fh, sel); + memset(routing->reserved, 0, sizeof(routing->reserved)); + + for (i = 0; i < routing->num_routes; ++i) { + const struct v4l2_subdev_route *route = &routes[i]; + const struct media_pad *pads = sd->entity.pads; + + if (route->sink_stream > V4L2_SUBDEV_MAX_STREAM_ID || + route->source_stream > V4L2_SUBDEV_MAX_STREAM_ID) + return -EINVAL; + + if (route->sink_pad >= sd->entity.num_pads) + return -EINVAL; + + if (!(pads[route->sink_pad].flags & + MEDIA_PAD_FL_SINK)) + return -EINVAL; + + if (route->source_pad >= sd->entity.num_pads) + return -EINVAL; + + if (!(pads[route->source_pad].flags & + MEDIA_PAD_FL_SOURCE)) + return -EINVAL; + + if (route->flags & V4L2_SUBDEV_ROUTE_FL_ACTIVE) + num_active_routes++; + } + + /* + * Drivers that implement routing need to report a frame + * descriptor accordingly, with up to one entry per route. Until + * the frame descriptors entries get allocated dynamically, + * limit the number of active routes to + * V4L2_FRAME_DESC_ENTRY_MAX. + */ + if (num_active_routes > V4L2_FRAME_DESC_ENTRY_MAX) + return -E2BIG; + + /* + * If the driver doesn't support setting routing, just return + * the routing table. + */ + if (!v4l2_subdev_has_op(sd, pad, set_routing)) { + memcpy((struct v4l2_subdev_route *)(uintptr_t)routing->routes, + state->routing.routes, + min(state->routing.num_routes, routing->len_routes) * + sizeof(*state->routing.routes)); + routing->num_routes = state->routing.num_routes; + + return 0; + } + + krouting.num_routes = routing->num_routes; + krouting.len_routes = routing->len_routes; + krouting.routes = routes; + + rval = v4l2_subdev_call(sd, pad, set_routing, state, + routing->which, &krouting); + if (rval < 0) + return rval; + + memcpy((struct v4l2_subdev_route *)(uintptr_t)routing->routes, + state->routing.routes, + min(state->routing.num_routes, routing->len_routes) * + sizeof(*state->routing.routes)); + routing->num_routes = state->routing.num_routes; + + return 0; } - case VIDIOC_SUBDEV_G_EDID: - return v4l2_subdev_call(sd, pad, get_edid, arg); + case VIDIOC_SUBDEV_G_CLIENT_CAP: { + struct v4l2_subdev_client_capability *client_cap = arg; + + client_cap->capabilities = subdev_fh->client_caps; + + return 0; + } + + case VIDIOC_SUBDEV_S_CLIENT_CAP: { + struct v4l2_subdev_client_capability *client_cap = arg; + + /* + * Clear V4L2_SUBDEV_CLIENT_CAP_STREAMS if streams API is not + * enabled. Remove this when streams API is no longer + * experimental. + */ + if (!v4l2_subdev_enable_streams_api) + client_cap->capabilities &= ~V4L2_SUBDEV_CLIENT_CAP_STREAMS; + + /* Filter out unsupported capabilities */ + client_cap->capabilities &= (V4L2_SUBDEV_CLIENT_CAP_STREAMS | + V4L2_SUBDEV_CLIENT_CAP_INTERVAL_USES_WHICH); + + subdev_fh->client_caps = client_cap->capabilities; + + return 0; + } - case VIDIOC_SUBDEV_S_EDID: - return v4l2_subdev_call(sd, pad, set_edid, arg); -#endif default: return v4l2_subdev_call(sd, core, ioctl, cmd, arg); } @@ -362,25 +1146,83 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *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)) { + struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); + struct v4l2_fh *vfh = file_to_v4l2_fh(file); + struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh); + struct v4l2_subdev_state *state; + + state = subdev_ioctl_get_state(sd, subdev_fh, cmd, arg); + + if (state) + v4l2_subdev_lock_state(state); + + ret = subdev_do_ioctl(file, cmd, arg, state); + + if (state) + v4l2_subdev_unlock_state(state); + } + + 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); + return video_usercopy(file, cmd, arg, subdev_do_ioctl_lock); } -static unsigned int subdev_poll(struct file *file, poll_table *wait) +#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); - struct v4l2_fh *fh = file->private_data; + + return v4l2_subdev_call(sd, core, compat_ioctl32, cmd, arg); +} +#endif + +#else /* CONFIG_VIDEO_V4L2_SUBDEV_API */ +static long subdev_ioctl(struct file *file, unsigned int cmd, + unsigned long arg) +{ + return -ENODEV; +} + +#ifdef CONFIG_COMPAT +static long subdev_compat_ioctl32(struct file *file, unsigned int cmd, + unsigned long arg) +{ + return -ENODEV; +} +#endif +#endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */ + +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_to_v4l2_fh(file); if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS)) - return POLLERR; + return EPOLLERR; poll_wait(file, &fh->wait, wait); if (v4l2_event_pending(fh)) - return POLLPRI; + return EPOLLPRI; return 0; } @@ -389,72 +1231,1324 @@ 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_get_fwnode_pad_1_to_1(struct media_entity *entity, + struct fwnode_endpoint *endpoint) +{ + struct fwnode_handle *fwnode; + struct v4l2_subdev *sd; + + if (!is_media_entity_v4l2_subdev(entity)) + return -EINVAL; + + sd = media_entity_to_v4l2_subdev(entity); + + fwnode = fwnode_graph_get_port_parent(endpoint->local_fwnode); + fwnode_handle_put(fwnode); + + if (device_match_fwnode(sd->dev, fwnode)) + return endpoint->port; + + return -ENXIO; +} +EXPORT_SYMBOL_GPL(v4l2_subdev_get_fwnode_pad_1_to_1); + 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) { - 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) + bool pass = true; + + /* The width, height and code must match. */ + if (source_fmt->format.width != sink_fmt->format.width) { + dev_dbg(sd->entity.graph_obj.mdev->dev, + "%s: width does not match (source %u, sink %u)\n", + __func__, + source_fmt->format.width, sink_fmt->format.width); + pass = false; + } + + if (source_fmt->format.height != sink_fmt->format.height) { + dev_dbg(sd->entity.graph_obj.mdev->dev, + "%s: height does not match (source %u, sink %u)\n", + __func__, + source_fmt->format.height, sink_fmt->format.height); + pass = false; + } + + if (source_fmt->format.code != sink_fmt->format.code) { + dev_dbg(sd->entity.graph_obj.mdev->dev, + "%s: media bus code does not match (source 0x%8.8x, sink 0x%8.8x)\n", + __func__, + source_fmt->format.code, sink_fmt->format.code); + pass = false; + } + + /* 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) { + dev_dbg(sd->entity.graph_obj.mdev->dev, + "%s: field does not match (source %u, sink %u)\n", + __func__, + source_fmt->format.field, sink_fmt->format.field); + pass = false; + } + + if (pass) + return 0; + + dev_dbg(sd->entity.graph_obj.mdev->dev, + "%s: link was \"%s\":%u -> \"%s\":%u\n", __func__, + link->source->entity->name, link->source->index, + link->sink->entity->name, link->sink->index); + + return -EPIPE; +} +EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate_default); + +static int +v4l2_subdev_link_validate_get_format(struct media_pad *pad, u32 stream, + struct v4l2_subdev_format *fmt, + bool states_locked) +{ + struct v4l2_subdev_state *state; + struct v4l2_subdev *sd; + int ret; + + sd = media_entity_to_v4l2_subdev(pad->entity); + + fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE; + fmt->pad = pad->index; + fmt->stream = stream; + + if (states_locked) + state = v4l2_subdev_get_locked_active_state(sd); + else + state = v4l2_subdev_lock_and_get_active_state(sd); + + ret = v4l2_subdev_call(sd, pad, get_fmt, state, fmt); + + if (!states_locked && state) + v4l2_subdev_unlock_state(state); + + return ret; +} + +#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) + +static void __v4l2_link_validate_get_streams(struct media_pad *pad, + u64 *streams_mask, + bool states_locked) +{ + struct v4l2_subdev_route *route; + struct v4l2_subdev_state *state; + struct v4l2_subdev *subdev; + + subdev = media_entity_to_v4l2_subdev(pad->entity); + + *streams_mask = 0; + + if (states_locked) + state = v4l2_subdev_get_locked_active_state(subdev); + else + state = v4l2_subdev_lock_and_get_active_state(subdev); + + if (WARN_ON(!state)) + return; + + for_each_active_route(&state->routing, route) { + u32 route_pad; + u32 route_stream; + + if (pad->flags & MEDIA_PAD_FL_SOURCE) { + route_pad = route->source_pad; + route_stream = route->source_stream; + } else { + route_pad = route->sink_pad; + route_stream = route->sink_stream; + } + + if (route_pad != pad->index) + continue; + + *streams_mask |= BIT_ULL(route_stream); + } + + if (!states_locked) + v4l2_subdev_unlock_state(state); +} + +#endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */ + +static void v4l2_link_validate_get_streams(struct media_pad *pad, + u64 *streams_mask, + bool states_locked) +{ + struct v4l2_subdev *subdev = media_entity_to_v4l2_subdev(pad->entity); + + if (!(subdev->flags & V4L2_SUBDEV_FL_STREAMS)) { + /* Non-streams subdevs have an implicit stream 0 */ + *streams_mask = BIT_ULL(0); + return; + } + +#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) + __v4l2_link_validate_get_streams(pad, streams_mask, states_locked); +#else + /* This shouldn't happen */ + *streams_mask = 0; +#endif +} + +static int v4l2_subdev_link_validate_locked(struct media_link *link, bool states_locked) +{ + struct v4l2_subdev *sink_subdev = + media_entity_to_v4l2_subdev(link->sink->entity); + struct device *dev = sink_subdev->entity.graph_obj.mdev->dev; + u64 source_streams_mask; + u64 sink_streams_mask; + u64 dangling_sink_streams; + u32 stream; + int ret; + + dev_dbg(dev, "validating link \"%s\":%u -> \"%s\":%u\n", + link->source->entity->name, link->source->index, + link->sink->entity->name, link->sink->index); + + v4l2_link_validate_get_streams(link->source, &source_streams_mask, states_locked); + v4l2_link_validate_get_streams(link->sink, &sink_streams_mask, states_locked); + + /* + * It is ok to have more source streams than sink streams as extra + * source streams can just be ignored by the receiver, but having extra + * sink streams is an error as streams must have a source. + */ + dangling_sink_streams = (source_streams_mask ^ sink_streams_mask) & + sink_streams_mask; + if (dangling_sink_streams) { + dev_err(dev, "Dangling sink streams: mask %#llx\n", + dangling_sink_streams); return -EINVAL; + } + + /* Validate source and sink stream formats */ + + for (stream = 0; stream < sizeof(sink_streams_mask) * 8; ++stream) { + struct v4l2_subdev_format sink_fmt, source_fmt; + + if (!(sink_streams_mask & BIT_ULL(stream))) + continue; + + dev_dbg(dev, "validating stream \"%s\":%u:%u -> \"%s\":%u:%u\n", + link->source->entity->name, link->source->index, stream, + link->sink->entity->name, link->sink->index, stream); + + ret = v4l2_subdev_link_validate_get_format(link->source, stream, + &source_fmt, states_locked); + if (ret < 0) { + dev_dbg(dev, + "Failed to get format for \"%s\":%u:%u (but that's ok)\n", + link->source->entity->name, link->source->index, + stream); + continue; + } + + ret = v4l2_subdev_link_validate_get_format(link->sink, stream, + &sink_fmt, states_locked); + if (ret < 0) { + dev_dbg(dev, + "Failed to get format for \"%s\":%u:%u (but that's ok)\n", + link->sink->entity->name, link->sink->index, + stream); + continue; + } + + /* TODO: add stream number to link_validate() */ + ret = v4l2_subdev_call(sink_subdev, pad, link_validate, link, + &source_fmt, &sink_fmt); + if (!ret) + continue; + + if (ret != -ENOIOCTLCMD) + return ret; + + ret = v4l2_subdev_link_validate_default(sink_subdev, link, + &source_fmt, &sink_fmt); + + if (ret) + return ret; + } return 0; } -EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate_default); + +int v4l2_subdev_link_validate(struct media_link *link) +{ + struct v4l2_subdev *source_sd, *sink_sd; + struct v4l2_subdev_state *source_state, *sink_state; + bool states_locked; + int ret; + + /* + * Links are validated in the context of the sink entity. Usage of this + * helper on a sink that is not a subdev is a clear driver bug. + */ + if (WARN_ON_ONCE(!is_media_entity_v4l2_subdev(link->sink->entity))) + return -EINVAL; + + /* + * If the source is a video device, delegate link validation to it. This + * allows usage of this helper for subdev connected to a video output + * device, provided that the driver implement the video output device's + * .link_validate() operation. + */ + if (is_media_entity_v4l2_video_device(link->source->entity)) { + struct media_entity *source = link->source->entity; + + if (!source->ops || !source->ops->link_validate) { + /* + * Many existing drivers do not implement the required + * .link_validate() operation for their video devices. + * Print a warning to get the drivers fixed, and return + * 0 to avoid breaking userspace. This should + * eventually be turned into a WARN_ON() when all + * drivers will have been fixed. + */ + pr_warn_once("video device '%s' does not implement .link_validate(), driver bug!\n", + source->name); + return 0; + } + + /* + * Avoid infinite loops in case a video device incorrectly uses + * this helper function as its .link_validate() handler. + */ + if (WARN_ON(source->ops->link_validate == v4l2_subdev_link_validate)) + return -EINVAL; + + return source->ops->link_validate(link); + } + + /* + * If the source is still not a subdev, usage of this helper is a clear + * driver bug. + */ + if (WARN_ON(!is_media_entity_v4l2_subdev(link->source->entity))) + return -EINVAL; + + sink_sd = media_entity_to_v4l2_subdev(link->sink->entity); + source_sd = media_entity_to_v4l2_subdev(link->source->entity); + + sink_state = v4l2_subdev_get_unlocked_active_state(sink_sd); + source_state = v4l2_subdev_get_unlocked_active_state(source_sd); + + states_locked = sink_state && source_state; + + if (states_locked) + v4l2_subdev_lock_states(sink_state, source_state); + + ret = v4l2_subdev_link_validate_locked(link, states_locked); + + if (states_locked) + v4l2_subdev_unlock_states(sink_state, source_state); + + return ret; +} +EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate); + +bool v4l2_subdev_has_pad_interdep(struct media_entity *entity, + unsigned int pad0, unsigned int pad1) +{ + struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); + struct v4l2_subdev_krouting *routing; + struct v4l2_subdev_state *state; + unsigned int i; + + state = v4l2_subdev_lock_and_get_active_state(sd); + + routing = &state->routing; + + for (i = 0; i < routing->num_routes; ++i) { + struct v4l2_subdev_route *route = &routing->routes[i]; + + if (!(route->flags & V4L2_SUBDEV_ROUTE_FL_ACTIVE)) + continue; + + if ((route->sink_pad == pad0 && route->source_pad == pad1) || + (route->source_pad == pad0 && route->sink_pad == pad1)) { + v4l2_subdev_unlock_state(state); + return true; + } + } + + v4l2_subdev_unlock_state(state); + + return false; +} +EXPORT_SYMBOL_GPL(v4l2_subdev_has_pad_interdep); + +struct v4l2_subdev_state * +__v4l2_subdev_state_alloc(struct v4l2_subdev *sd, const char *lock_name, + struct lock_class_key *lock_key) +{ + struct v4l2_subdev_state *state; + int ret; + + state = kzalloc(sizeof(*state), GFP_KERNEL); + if (!state) + return ERR_PTR(-ENOMEM); + + __mutex_init(&state->_lock, lock_name, lock_key); + if (sd->state_lock) + state->lock = sd->state_lock; + else + state->lock = &state->_lock; + + state->sd = sd; + + /* Drivers that support streams do not need the legacy pad config */ + if (!(sd->flags & V4L2_SUBDEV_FL_STREAMS) && sd->entity.num_pads) { + state->pads = kvcalloc(sd->entity.num_pads, + sizeof(*state->pads), GFP_KERNEL); + if (!state->pads) { + ret = -ENOMEM; + goto err; + } + } + + if (sd->internal_ops && sd->internal_ops->init_state) { + /* + * There can be no race at this point, but we lock the state + * anyway to satisfy lockdep checks. + */ + v4l2_subdev_lock_state(state); + ret = sd->internal_ops->init_state(sd, state); + v4l2_subdev_unlock_state(state); + + if (ret) + goto err; + } + + return state; + +err: + if (state && state->pads) + kvfree(state->pads); + + kfree(state); + + return ERR_PTR(ret); +} +EXPORT_SYMBOL_GPL(__v4l2_subdev_state_alloc); + +void __v4l2_subdev_state_free(struct v4l2_subdev_state *state) +{ + if (!state) + return; + + mutex_destroy(&state->_lock); + + kfree(state->routing.routes); + kvfree(state->stream_configs.configs); + kvfree(state->pads); + kfree(state); +} +EXPORT_SYMBOL_GPL(__v4l2_subdev_state_free); + +int __v4l2_subdev_init_finalize(struct v4l2_subdev *sd, const char *name, + struct lock_class_key *key) +{ + struct v4l2_subdev_state *state; + struct device *dev = sd->dev; + bool has_disable_streams; + bool has_enable_streams; + bool has_s_stream; + + /* Check that the subdevice implements the required features */ + + has_s_stream = v4l2_subdev_has_op(sd, video, s_stream); + has_enable_streams = v4l2_subdev_has_op(sd, pad, enable_streams); + has_disable_streams = v4l2_subdev_has_op(sd, pad, disable_streams); + + if (has_enable_streams != has_disable_streams) { + dev_err(dev, + "subdev '%s' must implement both or neither of .enable_streams() and .disable_streams()\n", + sd->name); + return -EINVAL; + } + + if (sd->flags & V4L2_SUBDEV_FL_STREAMS) { + if (has_s_stream && !has_enable_streams) { + dev_err(dev, + "subdev '%s' must implement .enable/disable_streams()\n", + sd->name); + + return -EINVAL; + } + } + + if (sd->ctrl_handler) + sd->flags |= V4L2_SUBDEV_FL_HAS_EVENTS; + + state = __v4l2_subdev_state_alloc(sd, name, key); + if (IS_ERR(state)) + return PTR_ERR(state); + + sd->active_state = state; + + return 0; +} +EXPORT_SYMBOL_GPL(__v4l2_subdev_init_finalize); + +void v4l2_subdev_cleanup(struct v4l2_subdev *sd) +{ + struct v4l2_async_subdev_endpoint *ase, *ase_tmp; + + __v4l2_subdev_state_free(sd->active_state); + sd->active_state = NULL; + + /* Uninitialised sub-device, bail out here. */ + if (!sd->async_subdev_endpoint_list.next) + return; + + list_for_each_entry_safe(ase, ase_tmp, &sd->async_subdev_endpoint_list, + async_subdev_endpoint_entry) { + list_del(&ase->async_subdev_endpoint_entry); + + kfree(ase); + } +} +EXPORT_SYMBOL_GPL(v4l2_subdev_cleanup); + +struct v4l2_mbus_framefmt * +__v4l2_subdev_state_get_format(struct v4l2_subdev_state *state, + unsigned int pad, u32 stream) +{ + struct v4l2_subdev_stream_configs *stream_configs; + unsigned int i; + + if (WARN_ON_ONCE(!state)) + return NULL; + + if (state->pads) { + if (stream) + return NULL; + + if (pad >= state->sd->entity.num_pads) + return NULL; + + return &state->pads[pad].format; + } + + lockdep_assert_held(state->lock); + + stream_configs = &state->stream_configs; + + for (i = 0; i < stream_configs->num_configs; ++i) { + if (stream_configs->configs[i].pad == pad && + stream_configs->configs[i].stream == stream) + return &stream_configs->configs[i].fmt; + } + + return NULL; +} +EXPORT_SYMBOL_GPL(__v4l2_subdev_state_get_format); + +struct v4l2_rect * +__v4l2_subdev_state_get_crop(struct v4l2_subdev_state *state, unsigned int pad, + u32 stream) +{ + struct v4l2_subdev_stream_configs *stream_configs; + unsigned int i; + + if (WARN_ON_ONCE(!state)) + return NULL; + + if (state->pads) { + if (stream) + return NULL; + + if (pad >= state->sd->entity.num_pads) + return NULL; + + return &state->pads[pad].crop; + } + + lockdep_assert_held(state->lock); + + stream_configs = &state->stream_configs; + + for (i = 0; i < stream_configs->num_configs; ++i) { + if (stream_configs->configs[i].pad == pad && + stream_configs->configs[i].stream == stream) + return &stream_configs->configs[i].crop; + } + + return NULL; +} +EXPORT_SYMBOL_GPL(__v4l2_subdev_state_get_crop); + +struct v4l2_rect * +__v4l2_subdev_state_get_compose(struct v4l2_subdev_state *state, + unsigned int pad, u32 stream) +{ + struct v4l2_subdev_stream_configs *stream_configs; + unsigned int i; + + if (WARN_ON_ONCE(!state)) + return NULL; + + if (state->pads) { + if (stream) + return NULL; + + if (pad >= state->sd->entity.num_pads) + return NULL; + + return &state->pads[pad].compose; + } + + lockdep_assert_held(state->lock); + + stream_configs = &state->stream_configs; + + for (i = 0; i < stream_configs->num_configs; ++i) { + if (stream_configs->configs[i].pad == pad && + stream_configs->configs[i].stream == stream) + return &stream_configs->configs[i].compose; + } + + return NULL; +} +EXPORT_SYMBOL_GPL(__v4l2_subdev_state_get_compose); + +struct v4l2_fract * +__v4l2_subdev_state_get_interval(struct v4l2_subdev_state *state, + unsigned int pad, u32 stream) +{ + struct v4l2_subdev_stream_configs *stream_configs; + unsigned int i; + + if (WARN_ON(!state)) + return NULL; + + lockdep_assert_held(state->lock); + + if (state->pads) { + if (stream) + return NULL; + + if (pad >= state->sd->entity.num_pads) + return NULL; + + return &state->pads[pad].interval; + } + + lockdep_assert_held(state->lock); + + stream_configs = &state->stream_configs; + + for (i = 0; i < stream_configs->num_configs; ++i) { + if (stream_configs->configs[i].pad == pad && + stream_configs->configs[i].stream == stream) + return &stream_configs->configs[i].interval; + } + + return NULL; +} +EXPORT_SYMBOL_GPL(__v4l2_subdev_state_get_interval); + +#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) static int -v4l2_subdev_link_validate_get_format(struct media_pad *pad, - struct v4l2_subdev_format *fmt) +v4l2_subdev_init_stream_configs(struct v4l2_subdev_stream_configs *stream_configs, + const struct v4l2_subdev_krouting *routing) +{ + struct v4l2_subdev_stream_configs new_configs = { 0 }; + struct v4l2_subdev_route *route; + u32 idx; + + /* Count number of formats needed */ + for_each_active_route(routing, route) { + /* + * Each route needs a format on both ends of the route. + */ + new_configs.num_configs += 2; + } + + if (new_configs.num_configs) { + new_configs.configs = kvcalloc(new_configs.num_configs, + sizeof(*new_configs.configs), + GFP_KERNEL); + + if (!new_configs.configs) + return -ENOMEM; + } + + /* + * Fill in the 'pad' and stream' value for each item in the array from + * the routing table + */ + idx = 0; + + for_each_active_route(routing, route) { + new_configs.configs[idx].pad = route->sink_pad; + new_configs.configs[idx].stream = route->sink_stream; + + idx++; + + new_configs.configs[idx].pad = route->source_pad; + new_configs.configs[idx].stream = route->source_stream; + + idx++; + } + + kvfree(stream_configs->configs); + *stream_configs = new_configs; + + return 0; +} + +int v4l2_subdev_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, + struct v4l2_subdev_format *format) +{ + struct v4l2_mbus_framefmt *fmt; + + fmt = v4l2_subdev_state_get_format(state, format->pad, format->stream); + if (!fmt) + return -EINVAL; + + format->format = *fmt; + + return 0; +} +EXPORT_SYMBOL_GPL(v4l2_subdev_get_fmt); + +int v4l2_subdev_get_frame_interval(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_frame_interval *fi) +{ + struct v4l2_fract *interval; + + interval = v4l2_subdev_state_get_interval(state, fi->pad, fi->stream); + if (!interval) + return -EINVAL; + + fi->interval = *interval; + + return 0; +} +EXPORT_SYMBOL_GPL(v4l2_subdev_get_frame_interval); + +int v4l2_subdev_set_routing(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + const struct v4l2_subdev_krouting *routing) +{ + struct v4l2_subdev_krouting *dst = &state->routing; + const struct v4l2_subdev_krouting *src = routing; + struct v4l2_subdev_krouting new_routing = { 0 }; + size_t bytes; + int r; + + if (unlikely(check_mul_overflow((size_t)src->num_routes, + sizeof(*src->routes), &bytes))) + return -EOVERFLOW; + + lockdep_assert_held(state->lock); + + if (src->num_routes > 0) { + new_routing.routes = kmemdup(src->routes, bytes, GFP_KERNEL); + if (!new_routing.routes) + return -ENOMEM; + } + + new_routing.num_routes = src->num_routes; + + r = v4l2_subdev_init_stream_configs(&state->stream_configs, + &new_routing); + if (r) { + kfree(new_routing.routes); + return r; + } + + kfree(dst->routes); + *dst = new_routing; + + return 0; +} +EXPORT_SYMBOL_GPL(v4l2_subdev_set_routing); + +struct v4l2_subdev_route * +__v4l2_subdev_next_active_route(const struct v4l2_subdev_krouting *routing, + struct v4l2_subdev_route *route) { - if (media_entity_type(pad->entity) == MEDIA_ENT_T_V4L2_SUBDEV) { - struct v4l2_subdev *sd = - media_entity_to_v4l2_subdev(pad->entity); + if (route) + ++route; + else + route = &routing->routes[0]; - fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE; - fmt->pad = pad->index; - return v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt); + for (; route < routing->routes + routing->num_routes; ++route) { + if (!(route->flags & V4L2_SUBDEV_ROUTE_FL_ACTIVE)) + continue; + + return route; } - WARN(pad->entity->type != MEDIA_ENT_T_DEVNODE_V4L, - "Driver bug! Wrong media entity type 0x%08x, entity %s\n", - pad->entity->type, pad->entity->name); + return NULL; +} +EXPORT_SYMBOL_GPL(__v4l2_subdev_next_active_route); + +int v4l2_subdev_set_routing_with_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + const struct v4l2_subdev_krouting *routing, + const struct v4l2_mbus_framefmt *fmt) +{ + struct v4l2_subdev_stream_configs *stream_configs; + unsigned int i; + int ret; + + ret = v4l2_subdev_set_routing(sd, state, routing); + if (ret) + return ret; + + stream_configs = &state->stream_configs; + + for (i = 0; i < stream_configs->num_configs; ++i) + stream_configs->configs[i].fmt = *fmt; + + return 0; +} +EXPORT_SYMBOL_GPL(v4l2_subdev_set_routing_with_fmt); + +int v4l2_subdev_routing_find_opposite_end(const struct v4l2_subdev_krouting *routing, + u32 pad, u32 stream, u32 *other_pad, + u32 *other_stream) +{ + unsigned int i; + + for (i = 0; i < routing->num_routes; ++i) { + struct v4l2_subdev_route *route = &routing->routes[i]; + + if (route->source_pad == pad && + route->source_stream == stream) { + if (other_pad) + *other_pad = route->sink_pad; + if (other_stream) + *other_stream = route->sink_stream; + return 0; + } + + if (route->sink_pad == pad && route->sink_stream == stream) { + if (other_pad) + *other_pad = route->source_pad; + if (other_stream) + *other_stream = route->source_stream; + return 0; + } + } return -EINVAL; } +EXPORT_SYMBOL_GPL(v4l2_subdev_routing_find_opposite_end); -int v4l2_subdev_link_validate(struct media_link *link) +struct v4l2_mbus_framefmt * +v4l2_subdev_state_get_opposite_stream_format(struct v4l2_subdev_state *state, + u32 pad, u32 stream) { - struct v4l2_subdev *sink; - struct v4l2_subdev_format sink_fmt, source_fmt; - int rval; + u32 other_pad, other_stream; + int ret; + + ret = v4l2_subdev_routing_find_opposite_end(&state->routing, + pad, stream, + &other_pad, &other_stream); + if (ret) + return NULL; + + return v4l2_subdev_state_get_format(state, other_pad, other_stream); +} +EXPORT_SYMBOL_GPL(v4l2_subdev_state_get_opposite_stream_format); + +u64 v4l2_subdev_state_xlate_streams(const struct v4l2_subdev_state *state, + u32 pad0, u32 pad1, u64 *streams) +{ + const struct v4l2_subdev_krouting *routing = &state->routing; + struct v4l2_subdev_route *route; + u64 streams0 = 0; + u64 streams1 = 0; + + for_each_active_route(routing, route) { + if (route->sink_pad == pad0 && route->source_pad == pad1 && + (*streams & BIT_ULL(route->sink_stream))) { + streams0 |= BIT_ULL(route->sink_stream); + streams1 |= BIT_ULL(route->source_stream); + } + if (route->source_pad == pad0 && route->sink_pad == pad1 && + (*streams & BIT_ULL(route->source_stream))) { + streams0 |= BIT_ULL(route->source_stream); + streams1 |= BIT_ULL(route->sink_stream); + } + } + + *streams = streams0; + return streams1; +} +EXPORT_SYMBOL_GPL(v4l2_subdev_state_xlate_streams); + +int v4l2_subdev_routing_validate(struct v4l2_subdev *sd, + const struct v4l2_subdev_krouting *routing, + enum v4l2_subdev_routing_restriction disallow) +{ + u32 *remote_pads = NULL; + unsigned int i, j; + int ret = -EINVAL; + + if (disallow & (V4L2_SUBDEV_ROUTING_NO_STREAM_MIX | + V4L2_SUBDEV_ROUTING_NO_MULTIPLEXING)) { + remote_pads = kcalloc(sd->entity.num_pads, sizeof(*remote_pads), + GFP_KERNEL); + if (!remote_pads) + return -ENOMEM; + + for (i = 0; i < sd->entity.num_pads; ++i) + remote_pads[i] = U32_MAX; + } + + for (i = 0; i < routing->num_routes; ++i) { + const struct v4l2_subdev_route *route = &routing->routes[i]; + + /* Validate the sink and source pad numbers. */ + if (route->sink_pad >= sd->entity.num_pads || + !(sd->entity.pads[route->sink_pad].flags & MEDIA_PAD_FL_SINK)) { + dev_dbg(sd->dev, "route %u sink (%u) is not a sink pad\n", + i, route->sink_pad); + goto out; + } + + if (route->source_pad >= sd->entity.num_pads || + !(sd->entity.pads[route->source_pad].flags & MEDIA_PAD_FL_SOURCE)) { + dev_dbg(sd->dev, "route %u source (%u) is not a source pad\n", + i, route->source_pad); + goto out; + } + + /* + * V4L2_SUBDEV_ROUTING_NO_SINK_STREAM_MIX: all streams from a + * sink pad must be routed to a single source pad. + */ + if (disallow & V4L2_SUBDEV_ROUTING_NO_SINK_STREAM_MIX) { + if (remote_pads[route->sink_pad] != U32_MAX && + remote_pads[route->sink_pad] != route->source_pad) { + dev_dbg(sd->dev, + "route %u attempts to mix %s streams\n", + i, "sink"); + goto out; + } + } + + /* + * V4L2_SUBDEV_ROUTING_NO_SOURCE_STREAM_MIX: all streams on a + * source pad must originate from a single sink pad. + */ + if (disallow & V4L2_SUBDEV_ROUTING_NO_SOURCE_STREAM_MIX) { + if (remote_pads[route->source_pad] != U32_MAX && + remote_pads[route->source_pad] != route->sink_pad) { + dev_dbg(sd->dev, + "route %u attempts to mix %s streams\n", + i, "source"); + goto out; + } + } + + /* + * V4L2_SUBDEV_ROUTING_NO_SINK_MULTIPLEXING: Pads on the sink + * side can not do stream multiplexing, i.e. there can be only + * a single stream in a sink pad. + */ + if (disallow & V4L2_SUBDEV_ROUTING_NO_SINK_MULTIPLEXING) { + if (remote_pads[route->sink_pad] != U32_MAX) { + dev_dbg(sd->dev, + "route %u attempts to multiplex on %s pad %u\n", + i, "sink", route->sink_pad); + goto out; + } + } + + /* + * V4L2_SUBDEV_ROUTING_NO_SOURCE_MULTIPLEXING: Pads on the + * source side can not do stream multiplexing, i.e. there can + * be only a single stream in a source pad. + */ + if (disallow & V4L2_SUBDEV_ROUTING_NO_SOURCE_MULTIPLEXING) { + if (remote_pads[route->source_pad] != U32_MAX) { + dev_dbg(sd->dev, + "route %u attempts to multiplex on %s pad %u\n", + i, "source", route->source_pad); + goto out; + } + } + + if (remote_pads) { + remote_pads[route->sink_pad] = route->source_pad; + remote_pads[route->source_pad] = route->sink_pad; + } + + for (j = i + 1; j < routing->num_routes; ++j) { + const struct v4l2_subdev_route *r = &routing->routes[j]; + + /* + * V4L2_SUBDEV_ROUTING_NO_1_TO_N: No two routes can + * originate from the same (sink) stream. + */ + if ((disallow & V4L2_SUBDEV_ROUTING_NO_1_TO_N) && + route->sink_pad == r->sink_pad && + route->sink_stream == r->sink_stream) { + dev_dbg(sd->dev, + "routes %u and %u originate from same sink (%u/%u)\n", + i, j, route->sink_pad, + route->sink_stream); + goto out; + } + + /* + * V4L2_SUBDEV_ROUTING_NO_N_TO_1: No two routes can end + * at the same (source) stream. + */ + if ((disallow & V4L2_SUBDEV_ROUTING_NO_N_TO_1) && + route->source_pad == r->source_pad && + route->source_stream == r->source_stream) { + dev_dbg(sd->dev, + "routes %u and %u end at same source (%u/%u)\n", + i, j, route->source_pad, + route->source_stream); + goto out; + } + } + } + + ret = 0; + +out: + kfree(remote_pads); + return ret; +} +EXPORT_SYMBOL_GPL(v4l2_subdev_routing_validate); + +static void v4l2_subdev_collect_streams(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + u32 pad, u64 streams_mask, + u64 *found_streams, + u64 *enabled_streams) +{ + if (!(sd->flags & V4L2_SUBDEV_FL_STREAMS)) { + *found_streams = BIT_ULL(0); + *enabled_streams = + (sd->enabled_pads & BIT_ULL(pad)) ? BIT_ULL(0) : 0; + dev_dbg(sd->dev, + "collect_streams: sub-device \"%s\" does not support streams\n", + sd->entity.name); + return; + } + + *found_streams = 0; + *enabled_streams = 0; - rval = v4l2_subdev_link_validate_get_format( - link->source, &source_fmt); - if (rval < 0) + for (unsigned int i = 0; i < state->stream_configs.num_configs; ++i) { + const struct v4l2_subdev_stream_config *cfg = + &state->stream_configs.configs[i]; + + if (cfg->pad != pad || !(streams_mask & BIT_ULL(cfg->stream))) + continue; + + *found_streams |= BIT_ULL(cfg->stream); + if (cfg->enabled) + *enabled_streams |= BIT_ULL(cfg->stream); + } + + dev_dbg(sd->dev, + "collect_streams: \"%s\":%u: found %#llx enabled %#llx\n", + sd->entity.name, pad, *found_streams, *enabled_streams); +} + +static void v4l2_subdev_set_streams_enabled(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + u32 pad, u64 streams_mask, + bool enabled) +{ + if (!(sd->flags & V4L2_SUBDEV_FL_STREAMS)) { + if (enabled) + sd->enabled_pads |= BIT_ULL(pad); + else + sd->enabled_pads &= ~BIT_ULL(pad); + return; + } + + for (unsigned int i = 0; i < state->stream_configs.num_configs; ++i) { + struct v4l2_subdev_stream_config *cfg = + &state->stream_configs.configs[i]; + + if (cfg->pad == pad && (streams_mask & BIT_ULL(cfg->stream))) + cfg->enabled = enabled; + } +} + +int v4l2_subdev_enable_streams(struct v4l2_subdev *sd, u32 pad, + u64 streams_mask) +{ + struct device *dev = sd->entity.graph_obj.mdev->dev; + struct v4l2_subdev_state *state; + bool already_streaming; + u64 enabled_streams; + u64 found_streams; + bool use_s_stream; + int ret; + + dev_dbg(dev, "enable streams \"%s\":%u/%#llx\n", sd->entity.name, pad, + streams_mask); + + /* A few basic sanity checks first. */ + if (pad >= sd->entity.num_pads) + return -EINVAL; + + if (!(sd->entity.pads[pad].flags & MEDIA_PAD_FL_SOURCE)) + return -EOPNOTSUPP; + + /* + * We use a 64-bit bitmask for tracking enabled pads, so only subdevices + * with 64 pads or less can be supported. + */ + if (pad >= sizeof(sd->enabled_pads) * BITS_PER_BYTE) + return -EOPNOTSUPP; + + if (!streams_mask) return 0; - rval = v4l2_subdev_link_validate_get_format( - link->sink, &sink_fmt); - if (rval < 0) + /* Fallback on .s_stream() if .enable_streams() isn't available. */ + use_s_stream = !v4l2_subdev_has_op(sd, pad, enable_streams); + + if (!use_s_stream) + state = v4l2_subdev_lock_and_get_active_state(sd); + else + state = NULL; + + /* + * Verify that the requested streams exist and that they are not + * already enabled. + */ + + v4l2_subdev_collect_streams(sd, state, pad, streams_mask, + &found_streams, &enabled_streams); + + if (found_streams != streams_mask) { + dev_dbg(dev, "streams 0x%llx not found on %s:%u\n", + streams_mask & ~found_streams, sd->entity.name, pad); + ret = -EINVAL; + goto done; + } + + if (enabled_streams) { + dev_dbg(dev, "streams 0x%llx already enabled on %s:%u\n", + enabled_streams, sd->entity.name, pad); + ret = -EALREADY; + goto done; + } + + already_streaming = v4l2_subdev_is_streaming(sd); + + if (!use_s_stream) { + /* Call the .enable_streams() operation. */ + ret = v4l2_subdev_call(sd, pad, enable_streams, state, pad, + streams_mask); + } else { + /* Start streaming when the first pad is enabled. */ + if (!already_streaming) + ret = v4l2_subdev_call(sd, video, s_stream, 1); + else + ret = 0; + } + + if (ret) { + dev_dbg(dev, "enable streams %u:%#llx failed: %d\n", pad, + streams_mask, ret); + goto done; + } + + /* Mark the streams as enabled. */ + v4l2_subdev_set_streams_enabled(sd, state, pad, streams_mask, true); + + /* + * TODO: When all the drivers have been changed to use + * v4l2_subdev_enable_streams() and v4l2_subdev_disable_streams(), + * instead of calling .s_stream() operation directly, we can remove + * the privacy LED handling from call_s_stream() and do it here + * for all cases. + */ + if (!use_s_stream && !already_streaming) + v4l2_subdev_enable_privacy_led(sd); + +done: + if (!use_s_stream) + v4l2_subdev_unlock_state(state); + + return ret; +} +EXPORT_SYMBOL_GPL(v4l2_subdev_enable_streams); + +int v4l2_subdev_disable_streams(struct v4l2_subdev *sd, u32 pad, + u64 streams_mask) +{ + struct device *dev = sd->entity.graph_obj.mdev->dev; + struct v4l2_subdev_state *state; + u64 enabled_streams; + u64 found_streams; + bool use_s_stream; + int ret; + + dev_dbg(dev, "disable streams \"%s\":%u/%#llx\n", sd->entity.name, pad, + streams_mask); + + /* A few basic sanity checks first. */ + if (pad >= sd->entity.num_pads) + return -EINVAL; + + if (!(sd->entity.pads[pad].flags & MEDIA_PAD_FL_SOURCE)) + return -EOPNOTSUPP; + + /* + * We use a 64-bit bitmask for tracking enabled pads, so only subdevices + * with 64 pads or less can be supported. + */ + if (pad >= sizeof(sd->enabled_pads) * BITS_PER_BYTE) + return -EOPNOTSUPP; + + if (!streams_mask) return 0; - sink = media_entity_to_v4l2_subdev(link->sink->entity); + /* Fallback on .s_stream() if .disable_streams() isn't available. */ + use_s_stream = !v4l2_subdev_has_op(sd, pad, disable_streams); - rval = v4l2_subdev_call(sink, pad, link_validate, link, - &source_fmt, &sink_fmt); - if (rval != -ENOIOCTLCMD) - return rval; + if (!use_s_stream) + state = v4l2_subdev_lock_and_get_active_state(sd); + else + state = NULL; - return v4l2_subdev_link_validate_default( - sink, link, &source_fmt, &sink_fmt); + /* + * Verify that the requested streams exist and that they are not + * already disabled. + */ + + v4l2_subdev_collect_streams(sd, state, pad, streams_mask, + &found_streams, &enabled_streams); + + if (found_streams != streams_mask) { + dev_dbg(dev, "streams 0x%llx not found on %s:%u\n", + streams_mask & ~found_streams, sd->entity.name, pad); + ret = -EINVAL; + goto done; + } + + if (enabled_streams != streams_mask) { + dev_dbg(dev, "streams 0x%llx already disabled on %s:%u\n", + streams_mask & ~enabled_streams, sd->entity.name, pad); + ret = -EALREADY; + goto done; + } + + if (!use_s_stream) { + /* Call the .disable_streams() operation. */ + ret = v4l2_subdev_call(sd, pad, disable_streams, state, pad, + streams_mask); + } else { + /* Stop streaming when the last streams are disabled. */ + + if (!(sd->enabled_pads & ~BIT_ULL(pad))) + ret = v4l2_subdev_call(sd, video, s_stream, 0); + else + ret = 0; + } + + if (ret) { + dev_dbg(dev, "disable streams %u:%#llx failed: %d\n", pad, + streams_mask, ret); + goto done; + } + + v4l2_subdev_set_streams_enabled(sd, state, pad, streams_mask, false); + +done: + if (!use_s_stream) { + if (!v4l2_subdev_is_streaming(sd)) + v4l2_subdev_disable_privacy_led(sd); + + v4l2_subdev_unlock_state(state); + } + + return ret; } -EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate); +EXPORT_SYMBOL_GPL(v4l2_subdev_disable_streams); + +int v4l2_subdev_s_stream_helper(struct v4l2_subdev *sd, int enable) +{ + struct v4l2_subdev_state *state; + struct v4l2_subdev_route *route; + struct media_pad *pad; + u64 source_mask = 0; + int pad_index = -1; + + /* + * Find the source pad. This helper is meant for subdevs that have a + * single source pad, so failures shouldn't happen, but catch them + * loudly nonetheless as they indicate a driver bug. + */ + media_entity_for_each_pad(&sd->entity, pad) { + if (pad->flags & MEDIA_PAD_FL_SOURCE) { + pad_index = pad->index; + break; + } + } + + if (WARN_ON(pad_index == -1)) + return -EINVAL; + + if (sd->flags & V4L2_SUBDEV_FL_STREAMS) { + /* + * As there's a single source pad, just collect all the source + * streams. + */ + state = v4l2_subdev_lock_and_get_active_state(sd); + + for_each_active_route(&state->routing, route) + source_mask |= BIT_ULL(route->source_stream); + + v4l2_subdev_unlock_state(state); + } else { + /* + * For non-streams subdevices, there's a single implicit stream + * per pad. + */ + source_mask = BIT_ULL(0); + } + + if (enable) + return v4l2_subdev_enable_streams(sd, pad_index, source_mask); + else + return v4l2_subdev_disable_streams(sd, pad_index, source_mask); +} +EXPORT_SYMBOL_GPL(v4l2_subdev_s_stream_helper); + +#endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */ + #endif /* CONFIG_MEDIA_CONTROLLER */ void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops) @@ -468,9 +2562,78 @@ void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops) sd->grp_id = 0; sd->dev_priv = NULL; sd->host_priv = NULL; + sd->privacy_led = NULL; + INIT_LIST_HEAD(&sd->async_subdev_endpoint_list); #if defined(CONFIG_MEDIA_CONTROLLER) sd->entity.name = sd->name; - sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV; + 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); + +bool v4l2_subdev_is_streaming(struct v4l2_subdev *sd) +{ + struct v4l2_subdev_state *state; + + if (!v4l2_subdev_has_op(sd, pad, enable_streams)) + return sd->s_stream_enabled; + + if (!(sd->flags & V4L2_SUBDEV_FL_STREAMS)) + return !!sd->enabled_pads; + + state = v4l2_subdev_get_locked_active_state(sd); + + for (unsigned int i = 0; i < state->stream_configs.num_configs; ++i) { + const struct v4l2_subdev_stream_config *cfg; + + cfg = &state->stream_configs.configs[i]; + + if (cfg->enabled) + return true; + } + + return false; +} +EXPORT_SYMBOL_GPL(v4l2_subdev_is_streaming); + +int v4l2_subdev_get_privacy_led(struct v4l2_subdev *sd) +{ +#if IS_REACHABLE(CONFIG_LEDS_CLASS) + sd->privacy_led = led_get(sd->dev, "privacy"); + if (IS_ERR(sd->privacy_led) && PTR_ERR(sd->privacy_led) != -ENOENT) + return dev_err_probe(sd->dev, PTR_ERR(sd->privacy_led), + "getting privacy LED\n"); + + if (!IS_ERR_OR_NULL(sd->privacy_led)) { + mutex_lock(&sd->privacy_led->led_access); + led_sysfs_disable(sd->privacy_led); + led_trigger_remove(sd->privacy_led); + led_set_brightness(sd->privacy_led, 0); + mutex_unlock(&sd->privacy_led->led_access); + } +#endif + return 0; +} +EXPORT_SYMBOL_GPL(v4l2_subdev_get_privacy_led); + +void v4l2_subdev_put_privacy_led(struct v4l2_subdev *sd) +{ +#if IS_REACHABLE(CONFIG_LEDS_CLASS) + if (!IS_ERR_OR_NULL(sd->privacy_led)) { + mutex_lock(&sd->privacy_led->led_access); + led_sysfs_enable(sd->privacy_led); + mutex_unlock(&sd->privacy_led->led_access); + led_put(sd->privacy_led); + } +#endif +} +EXPORT_SYMBOL_GPL(v4l2_subdev_put_privacy_led); |