[PATCH] Document additional environmental variables

[Kieran Bingham]

Quoting Pablo Pita (2024-07-27 06:18:05)
> * LIBCAMERA_IPA_PROXY_PATH: path to access a proxy IPA
> * LIBCAMERA_RPI_TUNING_FILE: used to pass tuning configuration data for the raspberry pi
> 
> Signed-off-by: Pablo Pita <pablo.pita at gmail.com>

I think you could have kept both of mine and Jacopo's RB tags for this
so I'm going to add them both (Jacopo, please let me know if you
object!)

>From v1:


Reviewed-by: Kieran Bingham <kieran.bingham at ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi at ideasonboard.com>

> ---
>  Documentation/environment_variables.rst | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/Documentation/environment_variables.rst b/Documentation/environment_variables.rst
> index 4e9fbb27..7cc13e9f 100644
> --- a/Documentation/environment_variables.rst
> +++ b/Documentation/environment_variables.rst
> @@ -37,6 +37,11 @@ LIBCAMERA_IPA_MODULE_PATH
>  
>     Example value: ``${HOME}/.libcamera/lib:/opt/libcamera/vendor/lib``
>  
> +LIBCAMERA_IPA_PROXY_PATH
> +   Define custom full path for a proxy worker for a given executable name.
> +   
> +   Example value: ``${HOME}/.libcamera/proxy/worker:/opt/libcamera/vendor/proxy/worker``
> +   
>  LIBCAMERA_PIPELINES_MATCH_LIST
>     Define an ordered list of pipeline names to be used to match the media
>     devices in the system. The pipeline handler names used to populate the
> @@ -50,6 +55,11 @@ LIBCAMERA_RPI_CONFIG_FILE
>  
>     Example value: ``/usr/local/share/libcamera/pipeline/rpi/vc4/minimal_mem.yaml``
>  
> +LIBCAMERA_RPI_TUNING_FILE
> +   Define a custom JSON tuning file to use in the Raspberry Pi.
> +
> +   Example value: ``/usr/local/share/libcamera/ipa/rpi/vc4/custom_sensor.json``
> +
>  Further details
>  ---------------
>  
> -- 
> 2.43.0
>