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media: stm32: Use v4l2_async_notifier_add_fwnode_remote_subdev 

The use of v4l2_async_notifier_add_subdev will be discouraged.
Drivers are instead encouraged to use a helper such as
v4l2_async_notifier_add_fwnode_remote_subdev.

This fixes a misuse of the API, as v4l2_async_notifier_add_subdev
should get a kmalloc'ed struct v4l2_async_subdev,
removing some boilerplate code while at it.

Use the appropriate helper v4l2_async_notifier_add_fwnode_remote_subdev,
which handles the needed setup, instead of open-coding it.

This results in removal of the now unneeded driver-specific state
struct dcmi_graph_entity, keeping track of just the source
subdevice.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Reviewed-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Reviewed-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Ezequiel Garcia 2021-01-18 02:52:47 +01:00 committed by Mauro Carvalho Chehab
parent d6701f13bd
commit 49cff8db6c
1 changed files with 30 additions and 56 deletions
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86
drivers/media/platform/stm32/stm32-dcmi.c
View File

@ -99,13 +99,6 @@ enum state {
#define OVERRUN_ERROR_THRESHOLD 3
struct dcmi_graph_entity {
struct v4l2_async_subdev asd;
struct device_node *remote_node;
struct v4l2_subdev *source;
};
struct dcmi_format {
u32 fourcc;
u32 mbus_code;
@ -139,7 +132,7 @@ struct stm32_dcmi {
struct v4l2_device v4l2_dev;
struct video_device *vdev;
struct v4l2_async_notifier notifier;
struct dcmi_graph_entity entity;
struct v4l2_subdev *source;
struct v4l2_format fmt;
struct v4l2_rect crop;
bool do_crop;
@ -610,7 +603,7 @@ static int dcmi_pipeline_s_fmt(struct stm32_dcmi *dcmi,
struct v4l2_subdev_pad_config *pad_cfg,
struct v4l2_subdev_format *format)
{
struct media_entity *entity = &dcmi->entity.source->entity;
struct media_entity *entity = &dcmi->source->entity;
struct v4l2_subdev *subdev;
struct media_pad *sink_pad = NULL;
struct media_pad *src_pad = NULL;
@ -1018,7 +1011,7 @@ static int dcmi_try_fmt(struct stm32_dcmi *dcmi, struct v4l2_format *f,
}
v4l2_fill_mbus_format(&format.format, pix, sd_fmt->mbus_code);
ret = v4l2_subdev_call(dcmi->entity.source, pad, set_fmt,
ret = v4l2_subdev_call(dcmi->source, pad, set_fmt,
&pad_cfg, &format);
if (ret < 0)
return ret;
@ -1152,7 +1145,7 @@ static int dcmi_get_sensor_format(struct stm32_dcmi *dcmi,
};
int ret;
ret = v4l2_subdev_call(dcmi->entity.source, pad, get_fmt, NULL, &fmt);
ret = v4l2_subdev_call(dcmi->source, pad, get_fmt, NULL, &fmt);
if (ret)
return ret;
@ -1181,7 +1174,7 @@ static int dcmi_set_sensor_format(struct stm32_dcmi *dcmi,
}
v4l2_fill_mbus_format(&format.format, pix, sd_fmt->mbus_code);
ret = v4l2_subdev_call(dcmi->entity.source, pad, set_fmt,
ret = v4l2_subdev_call(dcmi->source, pad, set_fmt,
&pad_cfg, &format);
if (ret < 0)
return ret;
@ -1204,7 +1197,7 @@ static int dcmi_get_sensor_bounds(struct stm32_dcmi *dcmi,
/*
* Get sensor bounds first
*/
ret = v4l2_subdev_call(dcmi->entity.source, pad, get_selection,
ret = v4l2_subdev_call(dcmi->source, pad, get_selection,
NULL, &bounds);
if (!ret)
*r = bounds.r;
@ -1385,7 +1378,7 @@ static int dcmi_enum_framesizes(struct file *file, void *fh,
fse.code = sd_fmt->mbus_code;
ret = v4l2_subdev_call(dcmi->entity.source, pad, enum_frame_size,
ret = v4l2_subdev_call(dcmi->source, pad, enum_frame_size,
NULL, &fse);
if (ret)
return ret;
@ -1402,7 +1395,7 @@ static int dcmi_g_parm(struct file *file, void *priv,
{
struct stm32_dcmi *dcmi = video_drvdata(file);
return v4l2_g_parm_cap(video_devdata(file), dcmi->entity.source, p);
return v4l2_g_parm_cap(video_devdata(file), dcmi->source, p);
}
static int dcmi_s_parm(struct file *file, void *priv,
@ -1410,7 +1403,7 @@ static int dcmi_s_parm(struct file *file, void *priv,
{
struct stm32_dcmi *dcmi = video_drvdata(file);
return v4l2_s_parm_cap(video_devdata(file), dcmi->entity.source, p);
return v4l2_s_parm_cap(video_devdata(file), dcmi->source, p);
}
static int dcmi_enum_frameintervals(struct file *file, void *fh,
@ -1432,7 +1425,7 @@ static int dcmi_enum_frameintervals(struct file *file, void *fh,
fie.code = sd_fmt->mbus_code;
ret = v4l2_subdev_call(dcmi->entity.source, pad,
ret = v4l2_subdev_call(dcmi->source, pad,
enum_frame_interval, NULL, &fie);
if (ret)
return ret;
@ -1452,7 +1445,7 @@ MODULE_DEVICE_TABLE(of, stm32_dcmi_of_match);
static int dcmi_open(struct file *file)
{
struct stm32_dcmi *dcmi = video_drvdata(file);
struct v4l2_subdev *sd = dcmi->entity.source;
struct v4l2_subdev *sd = dcmi->source;
int ret;
if (mutex_lock_interruptible(&dcmi->lock))
@ -1483,7 +1476,7 @@ static int dcmi_open(struct file *file)
static int dcmi_release(struct file *file)
{
struct stm32_dcmi *dcmi = video_drvdata(file);
struct v4l2_subdev *sd = dcmi->entity.source;
struct v4l2_subdev *sd = dcmi->source;
bool fh_singular;
int ret;
@ -1616,7 +1609,7 @@ static int dcmi_formats_init(struct stm32_dcmi *dcmi)
{
const struct dcmi_format *sd_fmts[ARRAY_SIZE(dcmi_formats)];
unsigned int num_fmts = 0, i, j;
struct v4l2_subdev *subdev = dcmi->entity.source;
struct v4l2_subdev *subdev = dcmi->source;
struct v4l2_subdev_mbus_code_enum mbus_code = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
};
@ -1675,7 +1668,7 @@ static int dcmi_formats_init(struct stm32_dcmi *dcmi)
static int dcmi_framesizes_init(struct stm32_dcmi *dcmi)
{
unsigned int num_fsize = 0;
struct v4l2_subdev *subdev = dcmi->entity.source;
struct v4l2_subdev *subdev = dcmi->source;
struct v4l2_subdev_frame_size_enum fse = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
.code = dcmi->sd_format->mbus_code,
@ -1727,14 +1720,13 @@ static int dcmi_graph_notify_complete(struct v4l2_async_notifier *notifier)
* we search for the source subdevice
* in order to expose it through V4L2 interface
*/
dcmi->entity.source =
media_entity_to_v4l2_subdev(dcmi_find_source(dcmi));
if (!dcmi->entity.source) {
dcmi->source = media_entity_to_v4l2_subdev(dcmi_find_source(dcmi));
if (!dcmi->source) {
dev_err(dcmi->dev, "Source subdevice not found\n");
return -ENODEV;
}
dcmi->vdev->ctrl_handler = dcmi->entity.source->ctrl_handler;
dcmi->vdev->ctrl_handler = dcmi->source->ctrl_handler;
ret = dcmi_formats_init(dcmi);
if (ret) {
@ -1813,46 +1805,28 @@ static const struct v4l2_async_notifier_operations dcmi_graph_notify_ops = {
.complete = dcmi_graph_notify_complete,
};
static int dcmi_graph_parse(struct stm32_dcmi *dcmi, struct device_node *node)
{
struct device_node *ep = NULL;
struct device_node *remote;
ep = of_graph_get_next_endpoint(node, ep);
if (!ep)
return -EINVAL;
remote = of_graph_get_remote_port_parent(ep);
of_node_put(ep);
if (!remote)
return -EINVAL;
/* Remote node to connect */
dcmi->entity.remote_node = remote;
dcmi->entity.asd.match_type = V4L2_ASYNC_MATCH_FWNODE;
dcmi->entity.asd.match.fwnode = of_fwnode_handle(remote);
return 0;
}
static int dcmi_graph_init(struct stm32_dcmi *dcmi)
{
struct v4l2_async_subdev *asd;
struct device_node *ep;
int ret;
/* Parse the graph to extract a list of subdevice DT nodes. */
ret = dcmi_graph_parse(dcmi, dcmi->dev->of_node);
if (ret < 0) {
dev_err(dcmi->dev, "Failed to parse graph\n");
return ret;
ep = of_graph_get_next_endpoint(dcmi->dev->of_node, NULL);
if (!ep) {
dev_err(dcmi->dev, "Failed to get next endpoint\n");
return -EINVAL;
}
v4l2_async_notifier_init(&dcmi->notifier);
ret = v4l2_async_notifier_add_subdev(&dcmi->notifier,
&dcmi->entity.asd);
if (ret) {
asd = v4l2_async_notifier_add_fwnode_remote_subdev(
&dcmi->notifier, of_fwnode_handle(ep), sizeof(*asd));
of_node_put(ep);
if (IS_ERR(asd)) {
dev_err(dcmi->dev, "Failed to add subdev notifier\n");
of_node_put(dcmi->entity.remote_node);
return ret;
return PTR_ERR(asd);
}
dcmi->notifier.ops = &dcmi_graph_notify_ops;