[PATCH v2 02/13] dm: core: Add a helper to retrieve devices through graph endpoints

[Simon Glass]

On Thu, 5 Dec 2024 at 06:54, Miquel Raynal <miquel.raynal at bootlin.com> wrote:
>
> There are already several helpers to find a udevice based on its
> position in a device tree, like getting a child or a node pointed by a
> phandle, but there was no support for graph endpoints, which are very
> common in display pipelines.
>
> Add a new helper, named uclass_get_device_by_endpoint() which enters the
> child graph reprensentation, looks for a specific port, then follows the
> remote endpoint, and finally retrieves the first parent of the given
> uclass_id.
>
> This is a very handy and straightforward way to get a bridge or a panel
> handle.
>
> Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
> ---
>  drivers/core/uclass.c | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++
>  include/dm/uclass.h   | 21 +++++++++++++++++
>  2 files changed, 83 insertions(+)

Reviewed-by: Simon Glass <sjg at chromium.org>