Re: [PATCH 02/18] property: Add support for calling fwnode_graph_get_endpoint_by_id() for fwnode->secondary

[Laurent Pinchart]

Hi Daniel,

Thank you for the patch.

On Mon, Nov 30, 2020 at 01:31:13PM +0000, Daniel Scally wrote:
> This function is used to find fwnode endpoints against a device. In
> some instances those endpoints are software nodes which are children of
> fwnode->secondary. Add support to fwnode_graph_get_endpoint_by_id() to
> find those endpoints by recursively calling itself passing the ptr to
> fwnode->secondary in the event no endpoint is found for the primary.
> 
> Signed-off-by: Daniel Scally <djrscally@xxxxxxxxx>

Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>

> ---
> Changes since RFC v3:
> 
> 	Patch introduced. In discussion in the last submission I noted
> 	that the CIO2 device doesn't have an ACPI fwnode - that turns
> 	out to be true for _some_ devices but not others, so we need
> 	this function to check the secondary too.
> 
>  drivers/base/property.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/base/property.c b/drivers/base/property.c
> index a5ca2306796f..4ece6b086e36 100644
> --- a/drivers/base/property.c
> +++ b/drivers/base/property.c
> @@ -1162,6 +1162,10 @@ fwnode_graph_get_endpoint_by_id(const struct fwnode_handle *fwnode,
>  		best_ep_id = fwnode_ep.id;
>  	}
>  
> +	if (!best_ep && fwnode && !IS_ERR_OR_NULL(fwnode->secondary))
> +		return fwnode_graph_get_endpoint_by_id(fwnode->secondary, port,
> +						       endpoint, flags);
> +
>  	return best_ep;
>  }
>  EXPORT_SYMBOL_GPL(fwnode_graph_get_endpoint_by_id);

-- 
Regards,

Laurent Pinchart