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|
// SPDX-License-Identifier: GPL-2.0+
/*
* Driver for Renesas R-Car VIN
*
* 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
*
* Based on the soc-camera rcar_vin driver
*/
#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_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_dev *),
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_dev *),
const struct media_device_ops *ops)
{
struct rvin_group *group;
u32 id;
int ret;
/* Make sure VIN id is present and sane */
ret = of_property_read_u32(vin->dev->of_node, "renesas,id", &id);
if (ret) {
vin_err(vin, "%pOF: No renesas,id property found\n",
vin->dev->of_node);
return -EINVAL;
}
if (id >= RCAR_VIN_NUM) {
vin_err(vin, "%pOF: Invalid renesas,id '%u'\n",
vin->dev->of_node, id);
return -EINVAL;
}
/* 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);
rvin_group_data = group;
}
mutex_unlock(&rvin_group_lock);
/* Add VIN to group */
mutex_lock(&group->lock);
if (group->vin[id]) {
vin_err(vin, "Duplicate renesas,id property value %u\n", id);
mutex_unlock(&group->lock);
kref_put(&group->refcount, rvin_group_release);
return -EINVAL;
}
group->vin[id] = vin;
vin->id = id;
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 < RVIN_REMOTES_MAX; 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);
}
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);
unsigned int i;
for (i = 0; i < RCAR_VIN_NUM; i++)
if (vin->group->vin[i])
rvin_v4l2_unregister(vin->group->vin[i]);
mutex_lock(&vin->group->lock);
for (i = 0; i < RVIN_CSI_MAX; i++) {
if (vin->group->remotes[i].asc != asc)
continue;
vin->group->remotes[i].subdev = NULL;
vin_dbg(vin, "Unbind %s from slot %u\n", subdev->name, i);
break;
}
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);
unsigned int i;
mutex_lock(&vin->group->lock);
for (i = 0; i < RVIN_CSI_MAX; 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);
break;
}
mutex_unlock(&vin->group->lock);
return 0;
}
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 void rvin_group_notifier_cleanup(struct rvin_dev *vin)
{
if (&vin->v4l2_dev == vin->group->notifier.v4l2_dev) {
v4l2_async_nf_unregister(&vin->group->notifier);
v4l2_async_nf_cleanup(&vin->group->notifier);
}
}
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);
/*
* 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;
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.asc_list))
return 0;
vin->group->notifier.ops = &rvin_group_notify_ops;
ret = v4l2_async_nf_register(&vin->v4l2_dev, &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, struct v4l2_subdev *subdev)
{
int ret;
ret = v4l2_ctrl_handler_init(&vin->ctrl_handler, 16);
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;
}
/* For the non-MC mode add controls from the subdevice. */
if (subdev) {
ret = v4l2_ctrl_add_handler(&vin->ctrl_handler,
subdev->ctrl_handler, NULL, true);
if (ret < 0) {
rvin_free_controls(vin);
return ret;
}
}
vin->vdev.ctrl_handler = &vin->ctrl_handler;
return 0;
}
/* -----------------------------------------------------------------------------
* Async notifier
*/
static int rvin_find_pad(struct v4l2_subdev *sd, int direction)
{
unsigned int pad;
if (sd->entity.num_pads <= 1)
return 0;
for (pad = 0; pad < sd->entity.num_pads; pad++)
if (sd->entity.pads[pad].flags & direction)
return pad;
return -EINVAL;
}
/* -----------------------------------------------------------------------------
* Parallel async notifier
*/
/* The vin lock should be held when calling the subdevice attach and detach */
static int rvin_parallel_subdevice_attach(struct rvin_dev *vin,
struct v4l2_subdev *subdev)
{
struct v4l2_subdev_mbus_code_enum code = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
};
int ret;
/* Find source and sink pad of remote subdevice */
ret = rvin_find_pad(subdev, MEDIA_PAD_FL_SOURCE);
if (ret < 0)
return ret;
vin->parallel.source_pad = ret;
ret = rvin_find_pad(subdev, MEDIA_PAD_FL_SINK);
vin->parallel.sink_pad = ret < 0 ? 0 : ret;
if (vin->info->use_mc) {
vin->parallel.subdev = subdev;
return 0;
}
/* Find compatible subdevices mbus format */
vin->mbus_code = 0;
code.index = 0;
code.pad = vin->parallel.source_pad;
while (!vin->mbus_code &&
!v4l2_subdev_call(subdev, pad, enum_mbus_code, NULL, &code)) {
code.index++;
switch (code.code) {
case MEDIA_BUS_FMT_YUYV8_1X16:
case MEDIA_BUS_FMT_UYVY8_1X16:
case MEDIA_BUS_FMT_UYVY8_2X8:
case MEDIA_BUS_FMT_UYVY10_2X10:
case MEDIA_BUS_FMT_RGB888_1X24:
vin->mbus_code = code.code;
vin_dbg(vin, "Found media bus format for %s: %d\n",
subdev->name, vin->mbus_code);
break;
default:
break;
}
}
if (!vin->mbus_code) {
vin_err(vin, "Unsupported media bus format for %s\n",
subdev->name);
return -EINVAL;
}
/* Read tvnorms */
ret = v4l2_subdev_call(subdev, video, g_tvnorms, &vin->vdev.tvnorms);
if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
return ret;
/* Read standard */
vin->std = V4L2_STD_UNKNOWN;
ret = v4l2_subdev_call(subdev, video, g_std, &vin->std);
if (ret < 0 && ret != -ENOIOCTLCMD)
return ret;
/* Add the controls */
ret = rvin_create_controls(vin, subdev);
if (ret < 0)
return ret;
vin->parallel.subdev = subdev;
return 0;
}
static void rvin_parallel_subdevice_detach(struct rvin_dev *vin)
{
rvin_v4l2_unregister(vin);
vin->parallel.subdev = NULL;
if (!vin->info->use_mc)
rvin_free_controls(vin);
}
static int rvin_parallel_notify_complete(struct v4l2_async_notifier *notifier)
{
struct rvin_dev *vin = v4l2_dev_to_vin(notifier->v4l2_dev);
struct media_entity *source;
struct media_entity *sink;
int ret;
ret = v4l2_device_register_subdev_nodes(&vin->v4l2_dev);
if (ret < 0) {
vin_err(vin, "Failed to register subdev nodes\n");
return ret;
}
if (!video_is_registered(&vin->vdev)) {
ret = rvin_v4l2_register(vin);
if (ret < 0)
return ret;
}
if (!vin->info->use_mc)
return 0;
/* If we're running with media-controller, link the subdevs. */
source = &vin->parallel.subdev->entity;
sink = &vin->vdev.entity;
ret = media_create_pad_link(source, vin->parallel.source_pad,
sink, vin->parallel.sink_pad, 0);
if (ret)
vin_err(vin, "Error adding link from %s to %s: %d\n",
source->name, sink->name, ret);
return ret;
}
static void rvin_parallel_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);
vin_dbg(vin, "unbind parallel subdev %s\n", subdev->name);
mutex_lock(&vin->lock);
rvin_parallel_subdevice_detach(vin);
mutex_unlock(&vin->lock);
}
static int rvin_parallel_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);
int ret;
mutex_lock(&vin->lock);
ret = rvin_parallel_subdevice_attach(vin, subdev);
mutex_unlock(&vin->lock);
if (ret)
return ret;
v4l2_set_subdev_hostdata(subdev, vin);
vin_dbg(vin, "bound subdev %s source pad: %u sink pad: %u\n",
subdev->name, vin->parallel.source_pad,
vin->parallel.sink_pad);
return 0;
}
static const struct v4l2_async_notifier_operations rvin_parallel_notify_ops = {
.bound = rvin_parallel_notify_bound,
.unbind = rvin_parallel_notify_unbind,
.complete = rvin_parallel_notify_complete,
};
static int rvin_parallel_parse_of(struct rvin_dev *vin)
{
struct fwnode_handle *ep, *fwnode;
struct v4l2_fwnode_endpoint vep = {
.bus_type = V4L2_MBUS_UNKNOWN,
};
struct v4l2_async_connection *asc;
int ret;
ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(vin->dev), 0, 0, 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;
}
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");
ret = -EINVAL;
goto out;
}
asc = v4l2_async_nf_add_fwnode(&vin->notifier, fwnode,
struct v4l2_async_connection);
if (IS_ERR(asc)) {
ret = PTR_ERR(asc);
goto out;
}
vin->parallel.asc = asc;
vin_dbg(vin, "Add parallel OF device %pOF\n", to_of_node(fwnode));
out:
fwnode_handle_put(fwnode);
return ret;
}
static void rvin_parallel_cleanup(struct rvin_dev *vin)
{
v4l2_async_nf_unregister(&vin->notifier);
v4l2_async_nf_cleanup(&vin->notifier);
}
static int rvin_parallel_init(struct rvin_dev *vin)
{
int ret;
v4l2_async_nf_init(&vin->notifier);
ret = rvin_parallel_parse_of(vin);
if (ret)
return ret;
if (!vin->parallel.asc)
return -ENODEV;
vin_dbg(vin, "Found parallel subdevice %pOF\n",
to_of_node(vin->parallel.asc->match.fwnode));
vin->notifier.ops = &rvin_parallel_notify_ops;
ret = v4l2_async_nf_register(&vin->v4l2_dev, &vin->notifier);
if (ret < 0) {
vin_err(vin, "Notifier registration failed\n");
v4l2_async_nf_cleanup(&vin->notifier);
return ret;
}
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_csi2_setup_links(struct rvin_dev *vin)
{
const struct rvin_group_route *route;
unsigned int id;
int ret = -EINVAL;
/* Create all media device links between VINs and CSI-2's. */
mutex_lock(&vin->group->lock);
for (route = vin->info->routes; route->chsel; route++) {
/* Check that VIN' master is part of the group. */
if (!vin->group->vin[route->master])
continue;
/* Check that CSI-2 is part of the group. */
if (!vin->group->remotes[route->csi].subdev)
continue;
for (id = route->master; id < route->master + 4; id++) {
/* Check that VIN is part of the group. */
if (!vin->group->vin[id])
continue;
ret = rvin_csi2_create_link(vin->group, id, route);
if (ret)
goto out;
}
}
out:
mutex_unlock(&vin->group->lock);
return ret;
}
static void rvin_csi2_cleanup(struct rvin_dev *vin)
{
rvin_parallel_cleanup(vin);
rvin_group_notifier_cleanup(vin);
rvin_group_put(vin);
rvin_free_controls(vin);
}
static int rvin_csi2_init(struct rvin_dev *vin)
{
int ret;
vin->pad.flags = MEDIA_PAD_FL_SINK;
ret = media_entity_pads_init(&vin->vdev.entity, 1, &vin->pad);
if (ret)
return ret;
ret = rvin_create_controls(vin, NULL);
if (ret < 0)
return ret;
ret = rvin_group_get(vin, rvin_csi2_setup_links, &rvin_csi2_media_ops);
if (ret)
goto err_controls;
/* It's OK to not have a parallel subdevice. */
ret = rvin_parallel_init(vin);
if (ret && ret != -ENODEV)
goto err_group;
ret = rvin_group_notifier_init(vin, 1, RVIN_CSI_MAX);
if (ret)
goto err_parallel;
return 0;
err_parallel:
rvin_parallel_cleanup(vin);
err_group:
rvin_group_put(vin);
err_controls:
rvin_free_controls(vin);
return ret;
}
/* -----------------------------------------------------------------------------
* ISP
*/
static int rvin_isp_setup_links(struct rvin_dev *vin)
{
unsigned int i;
int ret = -EINVAL;
/* Create all media device links between VINs and ISP's. */
mutex_lock(&vin->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;
if (!vin->group->vin[i])
continue;
/* Check that ISP is part of the group. */
if (!vin->group->remotes[source_slot].subdev)
continue;
source = &vin->group->remotes[source_slot].subdev->entity;
source_pad = &source->pads[source_idx];
sink = &vin->group->vin[i]->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(&vin->group->lock);
return ret;
}
static void rvin_isp_cleanup(struct rvin_dev *vin)
{
rvin_group_notifier_cleanup(vin);
rvin_group_put(vin);
rvin_free_controls(vin);
}
static int rvin_isp_init(struct rvin_dev *vin)
{
int ret;
vin->pad.flags = MEDIA_PAD_FL_SINK;
ret = media_entity_pads_init(&vin->vdev.entity, 1, &vin->pad);
if (ret)
return ret;
ret = rvin_create_controls(vin, NULL);
if (ret < 0)
return ret;
ret = rvin_group_get(vin, rvin_isp_setup_links, NULL);
if (ret)
goto err_controls;
ret = rvin_group_notifier_init(vin, 2, RVIN_ISP_MAX);
if (ret)
goto err_group;
return 0;
err_group:
rvin_group_put(vin);
err_controls:
rvin_free_controls(vin);
return ret;
}
/* -----------------------------------------------------------------------------
* Suspend / Resume
*/
static int __maybe_unused rvin_suspend(struct device *dev)
{
struct rvin_dev *vin = dev_get_drvdata(dev);
if (vin->state != RUNNING)
return 0;
rvin_stop_streaming(vin);
vin->state = SUSPENDED;
return 0;
}
static int __maybe_unused rvin_resume(struct device *dev)
{
struct rvin_dev *vin = dev_get_drvdata(dev);
if (vin->state != SUSPENDED)
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->use_mc) {
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,
.use_mc = false,
.max_width = 2048,
.max_height = 2048,
.scaler = rvin_scaler_gen2,
};
static const struct rvin_info rcar_info_m1 = {
.model = RCAR_M1,
.use_mc = false,
.max_width = 2048,
.max_height = 2048,
.scaler = rvin_scaler_gen2,
};
static const struct rvin_info rcar_info_gen2 = {
.model = RCAR_GEN2,
.use_mc = false,
.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 = 0x04 },
{ .master = 0, .csi = RVIN_CSI40, .chsel = 0x03 },
{ .master = 4, .csi = RVIN_CSI20, .chsel = 0x04 },
{ /* Sentinel */ }
};
static const struct rvin_info rcar_info_r8a774e1 = {
.model = RCAR_GEN3,
.use_mc = true,
.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 = 0x04 },
{ .master = 0, .csi = RVIN_CSI40, .chsel = 0x03 },
{ .master = 4, .csi = RVIN_CSI20, .chsel = 0x04 },
{ .master = 4, .csi = RVIN_CSI41, .chsel = 0x03 },
{ /* Sentinel */ }
};
static const struct rvin_info rcar_info_r8a7795 = {
.model = RCAR_GEN3,
.use_mc = true,
.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 = 0x04 },
{ .master = 0, .csi = RVIN_CSI40, .chsel = 0x03 },
{ .master = 4, .csi = RVIN_CSI20, .chsel = 0x04 },
{ .master = 4, .csi = RVIN_CSI40, .chsel = 0x03 },
{ /* Sentinel */ }
};
static const struct rvin_info rcar_info_r8a7796 = {
.model = RCAR_GEN3,
.use_mc = true,
.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 = 0x04 },
{ .master = 0, .csi = RVIN_CSI40, .chsel = 0x03 },
{ .master = 4, .csi = RVIN_CSI20, .chsel = 0x04 },
{ .master = 4, .csi = RVIN_CSI40, .chsel = 0x03 },
{ /* Sentinel */ }
};
static const struct rvin_info rcar_info_r8a77965 = {
.model = RCAR_GEN3,
.use_mc = true,
.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 = 0x03 },
{ /* Sentinel */ }
};
static const struct rvin_info rcar_info_r8a77970 = {
.model = RCAR_GEN3,
.use_mc = true,
.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 = 0x03 },
{ .master = 4, .csi = RVIN_CSI41, .chsel = 0x03 },
{ /* Sentinel */ }
};
static const struct rvin_info rcar_info_r8a77980 = {
.model = RCAR_GEN3,
.use_mc = true,
.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 = 0x03 },
{ /* Sentinel */ }
};
static const struct rvin_info rcar_info_r8a77990 = {
.model = RCAR_GEN3,
.use_mc = true,
.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,
.use_mc = true,
.nv12 = true,
.max_width = 4096,
.max_height = 4096,
.routes = rcar_info_r8a77995_routes,
.scaler = rvin_scaler_gen3,
};
static const struct rvin_info rcar_info_r8a779a0 = {
.model = RCAR_GEN3,
.use_mc = true,
.use_isp = true,
.nv12 = true,
.max_width = 4096,
.max_height = 4096,
};
static const struct rvin_info rcar_info_r8a779g0 = {
.model = RCAR_GEN3,
.use_mc = true,
.use_isp = true,
.nv12 = 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,
},
{
.compatible = "renesas,vin-r8a779a0",
.data = &rcar_info_r8a779a0,
},
{
.compatible = "renesas,vin-r8a779g0",
.data = &rcar_info_r8a779g0,
},
{ /* Sentinel */ },
};
MODULE_DEVICE_TABLE(of, rvin_of_id_table);
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 = 0xff;
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 (vin->info->use_isp) {
ret = rvin_isp_init(vin);
} else if (vin->info->use_mc) {
ret = rvin_csi2_init(vin);
if (vin->info->scaler &&
rvin_group_id_to_master(vin->id) == vin->id)
vin->scaler = vin->info->scaler;
} else {
ret = rvin_parallel_init(vin);
if (vin->info->scaler)
vin->scaler = vin->info->scaler;
}
if (ret) {
rvin_dma_unregister(vin);
return ret;
}
pm_suspend_ignore_children(&pdev->dev, true);
pm_runtime_enable(&pdev->dev);
return 0;
}
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->info->use_isp)
rvin_isp_cleanup(vin);
else if (vin->info->use_mc)
rvin_csi2_cleanup(vin);
else
rvin_parallel_cleanup(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_new = 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");
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