Re: [PATCH 15/37] drm/display: bridge-connector: allocate the connector dynamically

[Maxime Ripard]

On Tue, May 19, 2026 at 12:37:32PM +0200, Luca Ceresoli wrote:
> Currently the drm_bridge_connector has an embedded drm_connector, so their
> allocation lifetimes are tied to each other. This is insufficient to
> support DRM bridge hotplugging, which requires the connector to be added
> and removed dynamically at runtime multiple times based on hotplug/unplug
> events while the drm_bridge_connector is persistent.
> 
> Moreover the drm_connector is exposed to user space and thus an ongoing
> operation (e.g. an ioctl) might last for an arbitrarily long time even
> after the hardware gets removed. This means a new connector might have to
> be added when the previous one is still referenced by user space.
> 
> In preparation to handle hotplug, allocate the drm-connector dynamically,
> to allow:
> 
>  * creating and destroying a connector multiple times during a single
>    drm_bridge_connector lifetime
>  * creating a new connector even though the previous one is still in use
>    and thus still refcounted and not yet freed
> 
> This commit does not introduce the actions in the two bullets (it will
> happen in a later commit), it only moves to dynamic APIs for connector
> allocation and init.
> 
> Signed-off-by: Luca Ceresoli <luca.ceresoli@xxxxxxxxxxx>

I think this patch should be split in half, with the switch to using
destroy first, and then the actual move to the dynamically allocated
connector API.

Maxime

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