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media: v4l2-subdev: Introduce [get|set]_mbus_config pad ops

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Introduce two new pad operations to allow retrieving and configuring the
media bus parameters on a subdevice pad.

The newly introduced operations aims to replace the s/g_mbus_config video
operations, which have been on their way for deprecation since a long
time.

Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Jacopo Mondi 2020-07-17 16:53:15 +02:00 committed by Mauro Carvalho Chehab
parent 9123e3a74e
commit 38df0b8506
2 changed files with 44 additions and 0 deletions
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16
drivers/media/v4l2-core/v4l2-subdev.c
View File

@ -309,6 +309,20 @@ static int call_enum_dv_timings(struct v4l2_subdev *sd,
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)
{
return check_pad(sd, pad) ? :
sd->ops->pad->get_mbus_config(sd, pad, config);
}
static int call_set_mbus_config(struct v4l2_subdev *sd, unsigned int pad,
struct v4l2_mbus_config *config)
{
return check_pad(sd, pad) ? :
sd->ops->pad->get_mbus_config(sd, pad, config);
}
static const struct v4l2_subdev_pad_ops v4l2_subdev_call_pad_wrappers = {
.get_fmt = call_get_fmt,
.set_fmt = call_set_fmt,
@ -321,6 +335,8 @@ static const struct v4l2_subdev_pad_ops v4l2_subdev_call_pad_wrappers = {
.set_edid = call_set_edid,
.dv_timings_cap = call_dv_timings_cap,
.enum_dv_timings = call_enum_dv_timings,
.get_mbus_config = call_get_mbus_config,
.set_mbus_config = call_set_mbus_config,
};
static const struct v4l2_subdev_video_ops v4l2_subdev_call_video_wrappers = {

28
include/media/v4l2-subdev.h
View File

@ -670,6 +670,30 @@ struct v4l2_subdev_pad_config {
*
* @set_frame_desc: set the low level media bus frame parameters, @fd array
* may be adjusted by the subdev driver to device capabilities.
*
* @get_mbus_config: get the media bus configuration of a remote sub-device.
* The media bus configuration is usually retrieved from the
* firmware interface at sub-device probe time, immediately
* applied to the hardware and eventually adjusted by the
* driver. Remote sub-devices (usually video receivers) shall
* use this operation to query the transmitting end bus
* configuration in order to adjust their own one accordingly.
* Callers should make sure they get the most up-to-date as
* possible configuration from the remote end, likely calling
* this operation as close as possible to stream on time. The
* operation shall fail if the pad index it has been called on
* is not valid or in case of unrecoverable failures.
*
* @set_mbus_config: set the media bus configuration of a remote sub-device.
* This operations is intended to allow, in combination with
* the get_mbus_config operation, the negotiation of media bus
* configuration parameters between media sub-devices. The
* operation shall not fail if the requested configuration is
* not supported, but the driver shall update the content of
* the %config argument to reflect what has been actually
* applied to the hardware. The operation shall fail if the
* pad index it has been called on is not valid or in case of
* unrecoverable failures.
*/
struct v4l2_subdev_pad_ops {
int (*init_cfg)(struct v4l2_subdev *sd,
@ -710,6 +734,10 @@ struct v4l2_subdev_pad_ops {
struct v4l2_mbus_frame_desc *fd);
int (*set_frame_desc)(struct v4l2_subdev *sd, unsigned int pad,
struct v4l2_mbus_frame_desc *fd);
int (*get_mbus_config)(struct v4l2_subdev *sd, unsigned int pad,
struct v4l2_mbus_config *config);
int (*set_mbus_config)(struct v4l2_subdev *sd, unsigned int pad,
struct v4l2_mbus_config *config);
};
/**