[PATCH 2/3] drm/dp_mst: Expose build_mst_prop_path()

[Ville Syrjälä]

On Wed, Apr 24, 2019 at 08:40:30PM +0000, Li, Sun peng (Leo) wrote:
> 
> 
> 
> On 2019-04-24 1:26 p.m., Lyude Paul wrote:
> > Closer, but are we sure we want to use the MST prop path for this? Why not add
> > a sysfs attribute with the corresponding DRM connector name instead since the
> > connector itself will have a path property. That way we can associate aux
> > devices for eDP and DP devices with their corresponding connectors as well
> 
> I thought about that as well, but I hit a wall when trying to get the
> SST connector from the aux device. Perhaps there's a simpler way that
> I'm overlooking?
> 
> It's easier for MST, since the mst_port can be obtained via container_of
> dp_aux. port->connector would then give what we want.
> 
> For SST though, each driver calls drm_aux_register() with an aux struct
> that they've initialized. I'm not sure how I can reliably get the
> drm_connector from that.

On i915 the aux is a child of the connector, so no extra
attributes/links needed. Maybe other drivers should/could
follow  that apporach as well?

-- 
Ville Syrjälä
Intel