Re: [PATCH v4 3/4] media: Documentation: Update link frequency driver documentation

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Hi Sakari

On Mon, Apr 29, 2024 at 10:08:51PM +0300, Sakari Ailus wrote:
> Add the get_mbus_config() as the means for conveying the link frequency
> towards the receiver drivers.
>
> Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
> ---
>  Documentation/driver-api/media/tx-rx.rst | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/Documentation/driver-api/media/tx-rx.rst b/Documentation/driver-api/media/tx-rx.rst
> index 29d66a47b56e..2f22a1534da9 100644
> --- a/Documentation/driver-api/media/tx-rx.rst
> +++ b/Documentation/driver-api/media/tx-rx.rst
> @@ -49,6 +49,10 @@ Link frequency
>  The :ref:`V4L2_CID_LINK_FREQ <v4l2-cid-link-freq>` control is used to tell the
>  receiver the frequency of the bus (i.e. it is not the same as the symbol rate).
>
> +For devices where the link frequency is read-only, the link_freq field of struct

A control can be 'read-only' as well.

What about something along the lines of:

For devices where the link frequency doesn't need to be exposed to userspace,
the link_freq field of struct

> +v4l2_mbus_config is recommended over controls for conveying the link frequency
> +to the downstream driver in the pipeline.
> +
>  ``.s_stream()`` callback
>  ^^^^^^^^^^^^^^^^^^^^^^^^
>
> --
> 2.39.2
>
>




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