[PATCH v7 02/12] drm: bridge: panel: Implement drmm_of_dsi_get_bridge helper

[Maxime Ripard]

On Wed, Mar 29, 2023 at 06:46:08PM +0530, Jagan Teki wrote:
> Implement a DRM-managed action helper that returns the next DSI bridge
> in the chain.
> 
> Unlike general bridge return helper drmm_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 downstream DSI device that has been added via
> child or OF-graph port or ports node.
> 
> Upstream DSI looks for downstream devices using drm pointer, port and
> endpoint number. Downstream devices added via child node don't affect
> the port and endpoint number arguments.
> 
> Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>

If you intend to use it with the sun4i driver, then don't. The sun4i
driver is barely using drm-managed resources, so chances are all its
resources will be freed by the time this action will run.

Maxime
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