Add link_freq field to struct v4l2_mbus_config in order to pass the link
frequency to the receiving sub-device.
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-common.c | 11 ++++++++---
include/media/v4l2-mediabus.h | 2 ++
2 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
index 01650aed7c30..ff859a340c5d 100644
--- a/drivers/media/v4l2-core/v4l2-common.c
+++ b/drivers/media/v4l2-core/v4l2-common.c
@@ -506,13 +506,18 @@ EXPORT_SYMBOL_GPL(__v4l2_get_link_freq_ctrl);
s64 __v4l2_get_link_freq_pad(struct media_pad *pad, unsigned int mul,
unsigned int div)
{
+ struct v4l2_mbus_config mbus_config = {};
struct v4l2_subdev *sd;
+ int ret;
sd = media_entity_to_v4l2_subdev(pad->entity);
- if (!sd)
- return -ENODEV;
+ ret = v4l2_subdev_call(sd, pad, get_mbus_config, pad->index,
+ &mbus_config);
+ if (ret < 0 && ret != -ENOIOCTLCMD)
+ return ret;
- return __v4l2_get_link_freq_ctrl(sd->ctrl_handler, mul, div);
+ return mbus_config.link_freq ?:
+ __v4l2_get_link_freq_ctrl(sd->ctrl_handler, mul, div);
}
EXPORT_SYMBOL_GPL(__v4l2_get_link_freq_pad);
#endif /* CONFIG_MEDIA_CONTROLLER */
diff --git a/include/media/v4l2-mediabus.h b/include/media/v4l2-mediabus.h
index 5bce6e423e94..cc5f776dc662 100644
--- a/include/media/v4l2-mediabus.h
+++ b/include/media/v4l2-mediabus.h
@@ -148,6 +148,7 @@ enum v4l2_mbus_type {
/**
* struct v4l2_mbus_config - media bus configuration
* @type: interface type
+ * @link_freq: The link frequency. See also V4L2_CID_LINK_FREQ control.
* @bus: bus configuration data structure
* @bus.parallel: embedded &struct v4l2_mbus_config_parallel.
* Used if the bus is parallel or BT.656.
@@ -162,6 +163,7 @@ enum v4l2_mbus_type {
*/
struct v4l2_mbus_config {
enum v4l2_mbus_type type;
+ u64 link_freq;
union {
struct v4l2_mbus_config_parallel parallel;
struct v4l2_mbus_config_mipi_csi1 mipi_csi1;
--
2.39.2
