Re: [PATCH v3 3/4] drm/bridge: Add devm_drm_bridge_add()

[Maxime Ripard]

Hi,

On Tue, May 10, 2022 at 12:29:43PM -0700, Douglas Anderson wrote:
> This adds a devm managed version of drm_bridge_add(). Like other
> "devm" function listed in drm_bridge.h, this function takes an
> explicit "dev" to use for the lifetime management. A few notes:
> * In general we have a "struct device" for bridges that makes a good
>   candidate for where the lifetime matches exactly what we want.
> * The "bridge->dev->dev" device appears to be the encoder
>   device. That's not the right device to use for lifetime management.
> 
> Suggested-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
> Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>

If we are to introduce more managed helpers, I think it'd be wiser to
introduce them as DRM-managed, and not device managed.

Otherwise, you'll end up in a weird state when a device has been removed
but the DRM device is still around.

Maxime