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@xxxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-subdev.c | 16 +++++++++++++++
include/media/v4l2-subdev.h | 28 +++++++++++++++++++++++++++
2 files changed, 44 insertions(+)
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index 6b989fe5a0a9..a7d508e74d6b 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -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 = {
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index f7fe78a6f65a..57226e13ef91 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -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);
};
/**
--
2.27.0
