// SPDX-License-Identifier: GPL-2.0+
/*
* Driver for Renesas R - Car VIN
*
* Copyright ( C ) 2025 Niklas S ö derlund < niklas . soderlund @ ragnatech . se >
* Copyright ( C ) 2016 Renesas Electronics Corp .
* Copyright ( C ) 2011 - 2013 Renesas Solutions Corp .
* Copyright ( C ) 2013 Cogent Embedded , Inc . , < source @ cogentembedded . com >
* Copyright ( C ) 2008 Magnus Damm
*/
#include <linux/idr.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_graph.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <media/v4l2-async.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-mc.h>
#include "rcar-vin.h"
/*
* The companion CSI - 2 receiver driver ( rcar - csi2 ) is known
* and we know it has one source pad ( pad 0 ) and four sink
* pads ( pad 1 - 4 ) . So to translate a pad on the remote
* CSI - 2 receiver to / from the VIN internal channel number simply
* subtract / add one from the pad / channel number .
*/
#define rvin_group_csi_pad_to_channel(pad) ((pad) - 1 )
#define rvin_group_csi_channel_to_pad(channel) ((channel) + 1 )
/*
* Not all VINs are created equal , master VINs control the
* routing for other VIN ' s . We can figure out which VIN is
* master by looking at a VINs id .
*/
#define rvin_group_id_to_master(vin) ((vin) < 4 ? 0 : 4 )
#define v4l2_dev_to_vin(d) container_of(d, struct rvin_dev, v4l2_dev)
/* -----------------------------------------------------------------------------
* Gen3 Group Allocator
*/
/* FIXME: This should if we find a system that supports more
* than one group for the whole system be replaced with a linked
* list of groups . And eventually all of this should be replaced
* with a global device allocator API .
*
* But for now this works as on all supported systems there will
* be only one group for all instances .
*/
static DEFINE_IDA(rvin_ida);
static DEFINE_MUTEX(rvin_group_lock);
static struct rvin_group *rvin_group_data;
static void rvin_group_cleanup(struct rvin_group *group)
{
media_device_cleanup(&group->mdev);
mutex_destroy(&group->lock);
}
static int rvin_group_init(struct rvin_group *group, struct rvin_dev *vin,
int (*link_setup)(struct rvin_group *),
const struct media_device_ops *ops)
{
struct media_device *mdev = &group->mdev;
const struct of_device_id *match;
struct device_node *np;
mutex_init(&group->lock);
/* Count number of VINs in the system */
group->count = 0 ;
for_each_matching_node(np, vin->dev->driver->of_match_table)
if (of_device_is_available(np))
group->count++;
vin_dbg(vin, "found %u enabled VIN's in DT" , group->count);
group->link_setup = link_setup;
mdev->dev = vin->dev;
mdev->ops = ops;
match = of_match_node(vin->dev->driver->of_match_table,
vin->dev->of_node);
strscpy(mdev->driver_name, KBUILD_MODNAME, sizeof (mdev->driver_name));
strscpy(mdev->model, match->compatible, sizeof (mdev->model));
media_device_init(mdev);
return 0 ;
}
static void rvin_group_release(struct kref *kref)
{
struct rvin_group *group =
container_of(kref, struct rvin_group, refcount);
mutex_lock(&rvin_group_lock);
rvin_group_data = NULL;
rvin_group_cleanup(group);
kfree(group);
mutex_unlock(&rvin_group_lock);
}
static int rvin_group_get(struct rvin_dev *vin,
int (*link_setup)(struct rvin_group *),
const struct media_device_ops *ops)
{
struct rvin_group *group;
int ret;
/* Join or create a VIN group */
mutex_lock(&rvin_group_lock);
if (rvin_group_data) {
group = rvin_group_data;
kref_get(&group->refcount);
} else {
group = kzalloc(sizeof (*group), GFP_KERNEL);
if (!group) {
ret = -ENOMEM;
goto err_group;
}
ret = rvin_group_init(group, vin, link_setup, ops);
if (ret) {
kfree(group);
vin_err(vin, "Failed to initialize group\n" );
goto err_group;
}
kref_init(&group->refcount);
group->info = vin->info;
rvin_group_data = group;
}
mutex_unlock(&rvin_group_lock);
/* Add VIN to group */
mutex_lock(&group->lock);
if (group->vin[vin->id]) {
vin_err(vin, "Duplicate renesas,id property value %u\n" , vin->id);
mutex_unlock(&group->lock);
kref_put(&group->refcount, rvin_group_release);
return -EINVAL;
}
group->vin[vin->id] = vin;
vin->group = group;
vin->v4l2_dev.mdev = &group->mdev;
mutex_unlock(&group->lock);
return 0 ;
err_group:
mutex_unlock(&rvin_group_lock);
return ret;
}
static void rvin_group_put(struct rvin_dev *vin)
{
struct rvin_group *group = vin->group;
mutex_lock(&group->lock);
vin->group = NULL;
vin->v4l2_dev.mdev = NULL;
if (WARN_ON(group->vin[vin->id] != vin))
goto out;
group->vin[vin->id] = NULL;
out:
mutex_unlock(&group->lock);
kref_put(&group->refcount, rvin_group_release);
}
/* group lock should be held when calling this function. */
static int rvin_group_entity_to_remote_id(struct rvin_group *group,
struct media_entity *entity)
{
struct v4l2_subdev *sd;
unsigned int i;
sd = media_entity_to_v4l2_subdev(entity);
for (i = 0 ; i < ARRAY_SIZE(group->remotes); i++)
if (group->remotes[i].subdev == sd)
return i;
return -ENODEV;
}
static int rvin_group_notify_complete(struct v4l2_async_notifier *notifier)
{
struct rvin_dev *vin = v4l2_dev_to_vin(notifier->v4l2_dev);
unsigned int i;
int ret;
ret = media_device_register(&vin->group->mdev);
if (ret)
return ret;
ret = v4l2_device_register_subdev_nodes(&vin->v4l2_dev);
if (ret) {
vin_err(vin, "Failed to register subdev nodes\n" );
return ret;
}
/* Register all video nodes for the group. */
for (i = 0 ; i < RCAR_VIN_NUM; i++) {
if (vin->group->vin[i] &&
!video_is_registered(&vin->group->vin[i]->vdev)) {
ret = rvin_v4l2_register(vin->group->vin[i]);
if (ret)
return ret;
}
}
return vin->group->link_setup(vin->group);
}
static void rvin_group_notify_unbind(struct v4l2_async_notifier *notifier,
struct v4l2_subdev *subdev,
struct v4l2_async_connection *asc)
{
struct rvin_dev *vin = v4l2_dev_to_vin(notifier->v4l2_dev);
struct rvin_group *group = vin->group;
for (unsigned int i = 0 ; i < RCAR_VIN_NUM; i++) {
if (group->vin[i])
rvin_v4l2_unregister(group->vin[i]);
}
mutex_lock(&vin->group->lock);
for (unsigned int i = 0 ; i < RCAR_VIN_NUM; i++) {
if (!group->vin[i] || group->vin[i]->parallel.asc != asc)
continue ;
group->vin[i]->parallel.subdev = NULL;
vin_dbg(group->vin[i], "Unbind parallel subdev %s\n" ,
subdev->name);
}
for (unsigned int i = 0 ; i < ARRAY_SIZE(group->remotes); i++) {
if (group->remotes[i].asc != asc)
continue ;
group->remotes[i].subdev = NULL;
vin_dbg(vin, "Unbind %s from slot %u\n" , subdev->name, i);
}
mutex_unlock(&vin->group->lock);
media_device_unregister(&vin->group->mdev);
}
static int rvin_group_notify_bound(struct v4l2_async_notifier *notifier,
struct v4l2_subdev *subdev,
struct v4l2_async_connection *asc)
{
struct rvin_dev *vin = v4l2_dev_to_vin(notifier->v4l2_dev);
struct rvin_group *group = vin->group;
guard(mutex)(&group->lock);
for (unsigned int i = 0 ; i < RCAR_VIN_NUM; i++) {
struct rvin_dev *pvin = group->vin[i];
if (!pvin || pvin->parallel.asc != asc)
continue ;
pvin->parallel.source_pad = 0 ;
for (unsigned int pad = 0 ; pad < subdev->entity.num_pads; pad++)
if (subdev->entity.pads[pad].flags & MEDIA_PAD_FL_SOURCE)
pvin->parallel.source_pad = pad;
pvin->parallel.subdev = subdev;
vin_dbg(pvin, "Bound subdev %s\n" , subdev->name);
return 0 ;
}
for (unsigned int i = 0 ; i < ARRAY_SIZE(group->remotes); i++) {
if (vin->group->remotes[i].asc != asc)
continue ;
vin->group->remotes[i].subdev = subdev;
vin_dbg(vin, "Bound %s to slot %u\n" , subdev->name, i);
return 0 ;
}
return -ENODEV;
}
static const struct v4l2_async_notifier_operations rvin_group_notify_ops = {
.bound = rvin_group_notify_bound,
.unbind = rvin_group_notify_unbind,
.complete = rvin_group_notify_complete,
};
static int rvin_group_parse_of(struct rvin_dev *vin, unsigned int port,
unsigned int id)
{
struct fwnode_handle *ep, *fwnode;
struct v4l2_fwnode_endpoint vep = {
.bus_type = V4L2_MBUS_CSI2_DPHY,
};
struct v4l2_async_connection *asc;
int ret;
ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(vin->dev), port, id, 0 );
if (!ep)
return 0 ;
fwnode = fwnode_graph_get_remote_endpoint(ep);
ret = v4l2_fwnode_endpoint_parse(ep, &vep);
fwnode_handle_put(ep);
if (ret) {
vin_err(vin, "Failed to parse %pOF\n" , to_of_node(fwnode));
ret = -EINVAL;
goto out;
}
asc = v4l2_async_nf_add_fwnode(&vin->group->notifier, fwnode,
struct v4l2_async_connection);
if (IS_ERR(asc)) {
ret = PTR_ERR(asc);
goto out;
}
vin->group->remotes[vep.base.id].asc = asc;
vin_dbg(vin, "Add group OF device %pOF to slot %u\n" ,
to_of_node(fwnode), vep.base.id);
out:
fwnode_handle_put(fwnode);
return ret;
}
static int rvin_parallel_parse_of(struct rvin_dev *vin)
{
struct fwnode_handle *fwnode __free(fwnode_handle) = NULL;
struct fwnode_handle *ep __free(fwnode_handle) = NULL;
struct v4l2_fwnode_endpoint vep = {
.bus_type = V4L2_MBUS_UNKNOWN,
};
struct v4l2_async_connection *asc;
ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(vin->dev), 0 , 0 , 0 );
if (!ep)
return 0 ;
if (v4l2_fwnode_endpoint_parse(ep, &vep)) {
vin_err(vin, "Failed to parse %pOF\n" , to_of_node(ep));
return -EINVAL;
}
switch (vep.bus_type) {
case V4L2_MBUS_PARALLEL:
case V4L2_MBUS_BT656:
vin_dbg(vin, "Found %s media bus\n" ,
vep.bus_type == V4L2_MBUS_PARALLEL ?
"PARALLEL" : "BT656" );
vin->parallel.mbus_type = vep.bus_type;
vin->parallel.bus = vep.bus.parallel;
break ;
default :
vin_err(vin, "Unknown media bus type\n" );
return -EINVAL;
}
fwnode = fwnode_graph_get_remote_endpoint(ep);
asc = v4l2_async_nf_add_fwnode(&vin->group->notifier, fwnode,
struct v4l2_async_connection);
if (IS_ERR(asc))
return PTR_ERR(asc);
vin->parallel.asc = asc;
vin_dbg(vin, "Add parallel OF device %pOF\n" , to_of_node(fwnode));
return 0 ;
}
static int rvin_group_notifier_init(struct rvin_dev *vin, unsigned int port,
unsigned int max_id)
{
unsigned int count = 0 , vin_mask = 0 ;
unsigned int i, id;
int ret;
mutex_lock(&vin->group->lock);
/* If not all VIN's are registered don't register the notifier. */
for (i = 0 ; i < RCAR_VIN_NUM; i++) {
if (vin->group->vin[i]) {
count++;
vin_mask |= BIT(i);
}
}
if (vin->group->count != count) {
mutex_unlock(&vin->group->lock);
return 0 ;
}
mutex_unlock(&vin->group->lock);
v4l2_async_nf_init(&vin->group->notifier, &vin->v4l2_dev);
/*
* Some subdevices may overlap but the parser function can handle it and
* each subdevice will only be registered once with the group notifier .
*/
for (i = 0 ; i < RCAR_VIN_NUM; i++) {
if (!(vin_mask & BIT(i)))
continue ;
/* Parse local subdevice. */
ret = rvin_parallel_parse_of(vin->group->vin[i]);
if (ret)
return ret;
/* Parse shared subdevices. */
for (id = 0 ; id < max_id; id++) {
if (vin->group->remotes[id].asc)
continue ;
ret = rvin_group_parse_of(vin->group->vin[i], port, id);
if (ret)
return ret;
}
}
if (list_empty(&vin->group->notifier.waiting_list))
return 0 ;
vin->group->notifier.ops = &rvin_group_notify_ops;
ret = v4l2_async_nf_register(&vin->group->notifier);
if (ret < 0 ) {
vin_err(vin, "Notifier registration failed\n" );
v4l2_async_nf_cleanup(&vin->group->notifier);
return ret;
}
return 0 ;
}
/* -----------------------------------------------------------------------------
* Controls
*/
static int rvin_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct rvin_dev *vin =
container_of(ctrl->handler, struct rvin_dev, ctrl_handler);
switch (ctrl->id) {
case V4L2_CID_ALPHA_COMPONENT:
rvin_set_alpha(vin, ctrl->val);
break ;
}
return 0 ;
}
static const struct v4l2_ctrl_ops rvin_ctrl_ops = {
.s_ctrl = rvin_s_ctrl,
};
static void rvin_free_controls(struct rvin_dev *vin)
{
v4l2_ctrl_handler_free(&vin->ctrl_handler);
vin->vdev.ctrl_handler = NULL;
}
static int rvin_create_controls(struct rvin_dev *vin)
{
int ret;
ret = v4l2_ctrl_handler_init(&vin->ctrl_handler, 1 );
if (ret < 0 )
return ret;
/* The VIN directly deals with alpha component. */
v4l2_ctrl_new_std(&vin->ctrl_handler, &rvin_ctrl_ops,
V4L2_CID_ALPHA_COMPONENT, 0 , 255 , 1 , 255 );
if (vin->ctrl_handler.error) {
ret = vin->ctrl_handler.error;
rvin_free_controls(vin);
return ret;
}
vin->vdev.ctrl_handler = &vin->ctrl_handler;
return 0 ;
}
/* -----------------------------------------------------------------------------
* CSI - 2
*/
/*
* Link setup for the links between a VIN and a CSI - 2 receiver is a bit
* complex . The reason for this is that the register controlling routing
* is not present in each VIN instance . There are special VINs which
* control routing for themselves and other VINs . There are not many
* different possible links combinations that can be enabled at the same
* time , therefor all already enabled links which are controlled by a
* master VIN need to be taken into account when making the decision
* if a new link can be enabled or not .
*
* 1 . Find out which VIN the link the user tries to enable is connected to .
* 2 . Lookup which master VIN controls the links for this VIN .
* 3 . Start with a bitmask with all bits set .
* 4 . For each previously enabled link from the master VIN bitwise AND its
* route mask ( see documentation for mask in struct rvin_group_route )
* with the bitmask .
* 5 . Bitwise AND the mask for the link the user tries to enable to the bitmask .
* 6 . If the bitmask is not empty at this point the new link can be enabled
* while keeping all previous links enabled . Update the CHSEL value of the
* master VIN and inform the user that the link could be enabled .
*
* Please note that no link can be enabled if any VIN in the group is
* currently open .
*/
static int rvin_csi2_link_notify(struct media_link *link, u32 flags,
unsigned int notification)
{
struct rvin_group *group = container_of(link->graph_obj.mdev,
struct rvin_group, mdev);
struct media_entity *entity;
struct video_device *vdev;
struct rvin_dev *vin;
unsigned int i;
int csi_id, ret;
ret = v4l2_pipeline_link_notify(link, flags, notification);
if (ret)
return ret;
/* Only care about link enablement for VIN nodes. */
if (!(flags & MEDIA_LNK_FL_ENABLED) ||
!is_media_entity_v4l2_video_device(link->sink->entity))
return 0 ;
/*
* Don ' t allow link changes if any stream in the graph is active as
* modifying the CHSEL register fields can disrupt running streams .
*/
media_device_for_each_entity(entity, &group->mdev)
if (media_entity_is_streaming(entity))
return -EBUSY;
/* Find the master VIN that controls the routes. */
vdev = media_entity_to_video_device(link->sink->entity);
vin = container_of(vdev, struct rvin_dev, vdev);
mutex_lock(&group->lock);
csi_id = rvin_group_entity_to_remote_id(group, link->source->entity);
if (csi_id == -ENODEV) {
struct v4l2_subdev *sd;
/*
* Make sure the source entity subdevice is registered as
* a parallel input of one of the enabled VINs if it is not
* one of the CSI - 2 subdevices .
*
* No hardware configuration required for parallel inputs ,
* we can return here .
*/
sd = media_entity_to_v4l2_subdev(link->source->entity);
for (i = 0 ; i < RCAR_VIN_NUM; i++) {
if (group->vin[i] &&
group->vin[i]->parallel.subdev == sd) {
group->vin[i]->is_csi = false ;
ret = 0 ;
goto out;
}
}
vin_err(vin, "Subdevice %s not registered to any VIN\n" ,
link->source->entity->name);
ret = -ENODEV;
} else {
const struct rvin_group_route *route;
unsigned int chsel = UINT_MAX;
unsigned int master_id;
master_id = rvin_group_id_to_master(vin->id);
if (WARN_ON(!group->vin[master_id])) {
ret = -ENODEV;
goto out;
}
/* Make sure group is connected to same CSI-2 */
for (i = master_id; i < master_id + 4 ; i++) {
struct media_pad *csi_pad;
if (!group->vin[i])
continue ;
/* Get remote CSI-2, if any. */
csi_pad = media_pad_remote_pad_first(
&group->vin[i]->vdev.entity.pads[0 ]);
if (!csi_pad)
continue ;
if (csi_pad->entity != link->source->entity) {
vin_dbg(vin, "Already attached to %s\n" ,
csi_pad->entity->name);
ret = -EBUSY;
goto out;
}
}
for (route = vin->info->routes; route->chsel; route++) {
if (route->master == master_id && route->csi == csi_id) {
chsel = route->chsel;
break ;
}
}
if (chsel == UINT_MAX) {
vin_err(vin, "No CHSEL value found\n" );
ret = -EINVAL;
goto out;
}
ret = rvin_set_channel_routing(group->vin[master_id], chsel);
if (ret)
goto out;
vin->is_csi = true ;
}
out:
mutex_unlock(&group->lock);
return ret;
}
static const struct media_device_ops rvin_csi2_media_ops = {
.link_notify = rvin_csi2_link_notify,
};
static int rvin_csi2_create_link(struct rvin_group *group, unsigned int id,
const struct rvin_group_route *route)
{
struct media_entity *source = &group->remotes[route->csi].subdev->entity;
struct media_entity *sink = &group->vin[id]->vdev.entity;
struct media_pad *sink_pad = &sink->pads[0 ];
unsigned int channel;
int ret;
for (channel = 0 ; channel < 4 ; channel++) {
unsigned int source_idx = rvin_group_csi_channel_to_pad(channel);
struct media_pad *source_pad = &source->pads[source_idx];
/* Skip if link already exists. */
if (media_entity_find_link(source_pad, sink_pad))
continue ;
ret = media_create_pad_link(source, source_idx, sink, 0 , 0 );
if (ret)
return ret;
}
return 0 ;
}
static int rvin_parallel_setup_links(struct rvin_group *group)
{
u32 flags = MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE;
guard(mutex)(&group->lock);
/* If the group also has links don't enable the link. */
for (unsigned int i = 0 ; i < ARRAY_SIZE(group->remotes); i++) {
if (group->remotes[i].subdev) {
flags = 0 ;
break ;
}
}
/* Create links. */
for (unsigned int i = 0 ; i < RCAR_VIN_NUM; i++) {
struct rvin_dev *vin = group->vin[i];
struct media_entity *source;
struct media_entity *sink;
int ret;
/* Nothing to do if there is no VIN or parallel subdev. */
if (!vin || !vin->parallel.subdev)
continue ;
source = &vin->parallel.subdev->entity;
sink = &vin->vdev.entity;
ret = media_create_pad_link(source, vin->parallel.source_pad,
sink, 0 , flags);
if (ret)
return ret;
}
return 0 ;
}
static int rvin_csi2_setup_links(struct rvin_group *group)
{
const struct rvin_group_route *route;
unsigned int id;
int ret;
ret = rvin_parallel_setup_links(group);
if (ret)
return ret;
/* Create all media device links between VINs and CSI-2's. */
mutex_lock(&group->lock);
for (route = group->info->routes; route->chsel; route++) {
/* Check that VIN' master is part of the group. */
if (!group->vin[route->master])
continue ;
/* Check that CSI-2 is part of the group. */
if (!group->remotes[route->csi].subdev)
continue ;
for (id = route->master; id < route->master + 4 ; id++) {
/* Check that VIN is part of the group. */
if (!group->vin[id])
continue ;
ret = rvin_csi2_create_link(group, id, route);
if (ret)
goto out;
}
}
out:
mutex_unlock(&group->lock);
return ret;
}
static int rvin_csi2_init(struct rvin_dev *vin)
{
int ret;
ret = rvin_group_get(vin, rvin_csi2_setup_links, &rvin_csi2_media_ops);
if (ret)
return ret;
ret = rvin_group_notifier_init(vin, 1 , RVIN_CSI_MAX);
if (ret)
rvin_group_put(vin);
return ret;
}
/* -----------------------------------------------------------------------------
* ISP
*/
static int rvin_isp_setup_links(struct rvin_group *group)
{
unsigned int i;
int ret = -EINVAL;
/* Create all media device links between VINs and ISP's. */
mutex_lock(&group->lock);
for (i = 0 ; i < RCAR_VIN_NUM; i++) {
struct media_pad *source_pad, *sink_pad;
struct media_entity *source, *sink;
unsigned int source_slot = i / 8 ;
unsigned int source_idx = i % 8 + 1 ;
struct rvin_dev *vin = group->vin[i];
if (!vin)
continue ;
/* Check that ISP is part of the group. */
if (!group->remotes[source_slot].subdev)
continue ;
source = &group->remotes[source_slot].subdev->entity;
source_pad = &source->pads[source_idx];
sink = &vin->vdev.entity;
sink_pad = &sink->pads[0 ];
/* Skip if link already exists. */
if (media_entity_find_link(source_pad, sink_pad))
continue ;
ret = media_create_pad_link(source, source_idx, sink, 0 ,
MEDIA_LNK_FL_ENABLED |
MEDIA_LNK_FL_IMMUTABLE);
if (ret) {
vin_err(vin, "Error adding link from %s to %s\n" ,
source->name, sink->name);
break ;
}
}
mutex_unlock(&group->lock);
return ret;
}
static int rvin_isp_init(struct rvin_dev *vin)
{
int ret;
ret = rvin_group_get(vin, rvin_isp_setup_links, NULL);
if (ret)
return ret;
ret = rvin_group_notifier_init(vin, 2 , RVIN_ISP_MAX);
if (ret)
rvin_group_put(vin);
return ret;
}
/* -----------------------------------------------------------------------------
* Suspend / Resume
*/
static int __maybe_unused rvin_suspend(struct device *dev)
{
struct rvin_dev *vin = dev_get_drvdata(dev);
if (!vin->running)
return 0 ;
rvin_stop_streaming(vin);
return 0 ;
}
static int __maybe_unused rvin_resume(struct device *dev)
{
struct rvin_dev *vin = dev_get_drvdata(dev);
if (!vin->running)
return 0 ;
/*
* Restore group master CHSEL setting .
*
* This needs to be done by every VIN resuming not only the master
* as we don ' t know if and in which order the master VINs will
* be resumed .
*/
if (vin->info->model == RCAR_GEN3) {
unsigned int master_id = rvin_group_id_to_master(vin->id);
struct rvin_dev *master = vin->group->vin[master_id];
int ret;
if (WARN_ON(!master))
return -ENODEV;
ret = rvin_set_channel_routing(master, master->chsel);
if (ret)
return ret;
}
return rvin_start_streaming(vin);
}
/* -----------------------------------------------------------------------------
* Platform Device Driver
*/
static const struct rvin_info rcar_info_h1 = {
.model = RCAR_H1,
.max_width = 2048 ,
.max_height = 2048 ,
.scaler = rvin_scaler_gen2,
};
static const struct rvin_info rcar_info_m1 = {
.model = RCAR_M1,
.max_width = 2048 ,
.max_height = 2048 ,
.scaler = rvin_scaler_gen2,
};
static const struct rvin_info rcar_info_gen2 = {
.model = RCAR_GEN2,
.max_width = 2048 ,
.max_height = 2048 ,
.scaler = rvin_scaler_gen2,
};
static const struct rvin_group_route rcar_info_r8a774e1_routes[] = {
{ .master = 0 , .csi = RVIN_CSI20, .chsel = 0 x04 },
{ .master = 0 , .csi = RVIN_CSI40, .chsel = 0 x03 },
{ .master = 4 , .csi = RVIN_CSI20, .chsel = 0 x04 },
{ /* Sentinel */ }
};
static const struct rvin_info rcar_info_r8a774e1 = {
.model = RCAR_GEN3,
.max_width = 4096 ,
.max_height = 4096 ,
.routes = rcar_info_r8a774e1_routes,
};
static const struct rvin_group_route rcar_info_r8a7795_routes[] = {
{ .master = 0 , .csi = RVIN_CSI20, .chsel = 0 x04 },
{ .master = 0 , .csi = RVIN_CSI40, .chsel = 0 x03 },
{ .master = 4 , .csi = RVIN_CSI20, .chsel = 0 x04 },
{ .master = 4 , .csi = RVIN_CSI41, .chsel = 0 x03 },
{ /* Sentinel */ }
};
static const struct rvin_info rcar_info_r8a7795 = {
.model = RCAR_GEN3,
.nv12 = true ,
.max_width = 4096 ,
.max_height = 4096 ,
.routes = rcar_info_r8a7795_routes,
.scaler = rvin_scaler_gen3,
};
static const struct rvin_group_route rcar_info_r8a7796_routes[] = {
{ .master = 0 , .csi = RVIN_CSI20, .chsel = 0 x04 },
{ .master = 0 , .csi = RVIN_CSI40, .chsel = 0 x03 },
{ .master = 4 , .csi = RVIN_CSI20, .chsel = 0 x04 },
{ .master = 4 , .csi = RVIN_CSI40, .chsel = 0 x03 },
{ /* Sentinel */ }
};
static const struct rvin_info rcar_info_r8a7796 = {
.model = RCAR_GEN3,
.nv12 = true ,
.max_width = 4096 ,
.max_height = 4096 ,
.routes = rcar_info_r8a7796_routes,
.scaler = rvin_scaler_gen3,
};
static const struct rvin_group_route rcar_info_r8a77965_routes[] = {
{ .master = 0 , .csi = RVIN_CSI20, .chsel = 0 x04 },
{ .master = 0 , .csi = RVIN_CSI40, .chsel = 0 x03 },
{ .master = 4 , .csi = RVIN_CSI20, .chsel = 0 x04 },
{ .master = 4 , .csi = RVIN_CSI40, .chsel = 0 x03 },
{ /* Sentinel */ }
};
static const struct rvin_info rcar_info_r8a77965 = {
.model = RCAR_GEN3,
.nv12 = true ,
.max_width = 4096 ,
.max_height = 4096 ,
.routes = rcar_info_r8a77965_routes,
.scaler = rvin_scaler_gen3,
};
static const struct rvin_group_route rcar_info_r8a77970_routes[] = {
{ .master = 0 , .csi = RVIN_CSI40, .chsel = 0 x03 },
{ /* Sentinel */ }
};
static const struct rvin_info rcar_info_r8a77970 = {
.model = RCAR_GEN3,
.max_width = 4096 ,
.max_height = 4096 ,
.routes = rcar_info_r8a77970_routes,
};
static const struct rvin_group_route rcar_info_r8a77980_routes[] = {
{ .master = 0 , .csi = RVIN_CSI40, .chsel = 0 x03 },
{ .master = 4 , .csi = RVIN_CSI41, .chsel = 0 x03 },
{ /* Sentinel */ }
};
static const struct rvin_info rcar_info_r8a77980 = {
.model = RCAR_GEN3,
.nv12 = true ,
.max_width = 4096 ,
.max_height = 4096 ,
.routes = rcar_info_r8a77980_routes,
};
static const struct rvin_group_route rcar_info_r8a77990_routes[] = {
{ .master = 4 , .csi = RVIN_CSI40, .chsel = 0 x03 },
{ /* Sentinel */ }
};
static const struct rvin_info rcar_info_r8a77990 = {
.model = RCAR_GEN3,
.nv12 = true ,
.max_width = 4096 ,
.max_height = 4096 ,
.routes = rcar_info_r8a77990_routes,
.scaler = rvin_scaler_gen3,
};
static const struct rvin_group_route rcar_info_r8a77995_routes[] = {
{ /* Sentinel */ }
};
static const struct rvin_info rcar_info_r8a77995 = {
.model = RCAR_GEN3,
.nv12 = true ,
.max_width = 4096 ,
.max_height = 4096 ,
.routes = rcar_info_r8a77995_routes,
.scaler = rvin_scaler_gen3,
};
static const struct rvin_info rcar_info_gen4 = {
.model = RCAR_GEN4,
.use_isp = true ,
.nv12 = true ,
.raw10 = true ,
.max_width = 4096 ,
.max_height = 4096 ,
};
static const struct of_device_id rvin_of_id_table[] = {
{
.compatible = "renesas,vin-r8a774a1" ,
.data = &rcar_info_r8a7796,
},
{
.compatible = "renesas,vin-r8a774b1" ,
.data = &rcar_info_r8a77965,
},
{
.compatible = "renesas,vin-r8a774c0" ,
.data = &rcar_info_r8a77990,
},
{
.compatible = "renesas,vin-r8a774e1" ,
.data = &rcar_info_r8a774e1,
},
{
.compatible = "renesas,vin-r8a7778" ,
.data = &rcar_info_m1,
},
{
.compatible = "renesas,vin-r8a7779" ,
.data = &rcar_info_h1,
},
{
.compatible = "renesas,rcar-gen2-vin" ,
.data = &rcar_info_gen2,
},
{
.compatible = "renesas,vin-r8a7795" ,
.data = &rcar_info_r8a7795,
},
{
.compatible = "renesas,vin-r8a7796" ,
.data = &rcar_info_r8a7796,
},
{
.compatible = "renesas,vin-r8a77961" ,
.data = &rcar_info_r8a7796,
},
{
.compatible = "renesas,vin-r8a77965" ,
.data = &rcar_info_r8a77965,
},
{
.compatible = "renesas,vin-r8a77970" ,
.data = &rcar_info_r8a77970,
},
{
.compatible = "renesas,vin-r8a77980" ,
.data = &rcar_info_r8a77980,
},
{
.compatible = "renesas,vin-r8a77990" ,
.data = &rcar_info_r8a77990,
},
{
.compatible = "renesas,vin-r8a77995" ,
.data = &rcar_info_r8a77995,
},
{
/* Keep to be compatible with old DTS files. */
.compatible = "renesas,vin-r8a779a0" ,
.data = &rcar_info_gen4,
},
{
/* Keep to be compatible with old DTS files. */
.compatible = "renesas,vin-r8a779g0" ,
.data = &rcar_info_gen4,
},
{
.compatible = "renesas,rcar-gen4-vin" ,
.data = &rcar_info_gen4,
},
{ /* Sentinel */ },
};
MODULE_DEVICE_TABLE(of, rvin_of_id_table);
static int rvin_id_get(struct rvin_dev *vin)
{
u32 oid;
int id;
switch (vin->info->model) {
case RCAR_GEN3:
case RCAR_GEN4:
if (of_property_read_u32(vin->dev->of_node, "renesas,id" , &oid)) {
vin_err(vin, "%pOF: No renesas,id property found\n" ,
vin->dev->of_node);
return -EINVAL;
}
if (oid < 0 || oid >= RCAR_VIN_NUM) {
vin_err(vin, "%pOF: Invalid renesas,id '%u'\n" ,
vin->dev->of_node, oid);
return -EINVAL;
}
vin->id = oid;
break ;
default :
id = ida_alloc_range(&rvin_ida, 0 , RCAR_VIN_NUM - 1 ,
GFP_KERNEL);
if (id < 0 ) {
vin_err(vin, "%pOF: Failed to allocate VIN group ID\n" ,
vin->dev->of_node);
return -EINVAL;
}
vin->id = id;
break ;
}
return 0 ;
}
static void rvin_id_put(struct rvin_dev *vin)
{
switch (vin->info->model) {
case RCAR_GEN3:
case RCAR_GEN4:
break ;
default :
ida_free(&rvin_ida, vin->id);
break ;
}
}
static int rcar_vin_probe(struct platform_device *pdev)
{
struct rvin_dev *vin;
int irq, ret;
vin = devm_kzalloc(&pdev->dev, sizeof (*vin), GFP_KERNEL);
if (!vin)
return -ENOMEM;
vin->dev = &pdev->dev;
vin->info = of_device_get_match_data(&pdev->dev);
vin->alpha = 0 xff;
vin->base = devm_platform_ioremap_resource(pdev, 0 );
if (IS_ERR(vin->base))
return PTR_ERR(vin->base);
irq = platform_get_irq(pdev, 0 );
if (irq < 0 )
return irq;
ret = rvin_dma_register(vin, irq);
if (ret)
return ret;
platform_set_drvdata(pdev, vin);
if (rvin_id_get(vin)) {
ret = -EINVAL;
goto err_dma;
}
vin->pad.flags = MEDIA_PAD_FL_SINK;
ret = media_entity_pads_init(&vin->vdev.entity, 1 , &vin->pad);
if (ret)
goto err_id;
ret = rvin_create_controls(vin);
if (ret < 0 )
goto err_id;
switch (vin->info->model) {
case RCAR_GEN3:
case RCAR_GEN4:
if (vin->info->use_isp) {
ret = rvin_isp_init(vin);
} else {
ret = rvin_csi2_init(vin);
if (vin->info->scaler &&
rvin_group_id_to_master(vin->id) == vin->id)
vin->scaler = vin->info->scaler;
}
break ;
default :
ret = rvin_group_get(vin, rvin_parallel_setup_links, NULL);
if (!ret)
ret = rvin_group_notifier_init(vin, 0 , 0 );
if (vin->info->scaler)
vin->scaler = vin->info->scaler;
break ;
}
if (ret)
goto err_ctrl;
pm_suspend_ignore_children(&pdev->dev, true );
pm_runtime_enable(&pdev->dev);
return 0 ;
err_ctrl:
rvin_free_controls(vin);
err_id:
rvin_id_put(vin);
err_dma:
rvin_dma_unregister(vin);
return ret;
}
static void rcar_vin_remove(struct platform_device *pdev)
{
struct rvin_dev *vin = platform_get_drvdata(pdev);
pm_runtime_disable(&pdev->dev);
rvin_v4l2_unregister(vin);
if (&vin->v4l2_dev == vin->group->notifier.v4l2_dev) {
v4l2_async_nf_unregister(&vin->group->notifier);
v4l2_async_nf_cleanup(&vin->group->notifier);
}
rvin_group_put(vin);
rvin_free_controls(vin);
rvin_id_put(vin);
rvin_dma_unregister(vin);
}
static SIMPLE_DEV_PM_OPS(rvin_pm_ops, rvin_suspend, rvin_resume);
static struct platform_driver rcar_vin_driver = {
.driver = {
.name = "rcar-vin" ,
.suppress_bind_attrs = true ,
.pm = &rvin_pm_ops,
.of_match_table = rvin_of_id_table,
},
.probe = rcar_vin_probe,
.remove = rcar_vin_remove,
};
module_platform_driver(rcar_vin_driver);
MODULE_AUTHOR("Niklas Söderlund <niklas.soderlund@ragnatech.se>" );
MODULE_DESCRIPTION("Renesas R-Car VIN camera host driver" );
MODULE_LICENSE("GPL" );
Messung V0.5 in Prozent C=97 H=88 G=92
¤ Dauer der Verarbeitung: 0.15 Sekunden
(vorverarbeitet am 2026-10-11)
¤
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