[RESEND PATCH v11 02/18] drm: bridge: panel: Add devm_drm_of_dsi_get_bridge helper

[Maxime Ripard]

Hi,

On Mon, Jan 23, 2023 at 08:41:56PM +0530, Jagan Teki wrote:
> Add devm OF helper to return the next DSI bridge in the chain.
> 
> Unlike general bridge return helper devm_drm_of_get_bridge, this
> helper uses the dsi specific panel_or_bridge helper to find the
> next DSI device in the pipeline.
> 
> Helper lookup a given child DSI node or a DT node's port and
> endpoint number, find the connected node and return either
> the associated struct drm_panel or drm_bridge device.

I'm not sure that using a device managed helper is the right choice
here. The bridge will stay longer than the backing device so it will
create a use-after-free. You should probably use a DRM-managed action
here instead.

Maxime
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