On Fri, Apr 23, 2021 at 12:11:06AM -0400, Lyude Paul wrote: > On Thu, 2021-04-22 at 18:33 -0400, Lyude Paul wrote: > > OK - talked with Ville a bit on this and did some of my own research, I > > actually think that moving i2c to drm_dp_aux_init() is the right decision > > for > > the time being. The reasoning behind this being that as shown by my previous > > work of fixing drivers that call drm_dp_aux_register() too early - it seems > > like there's already been drivers that have been working just fine with > > setting up the i2c device before DRM registration. > > > > In the future, it'd probably be better if we can split up i2c_add_adapter() > > into an init and register function - but we'll have to talk with the i2c > > maintainers to see if this is acceptable w/ them > > Actually - I think adding the ability to refcount dp aux adapters might be a > better solution so I'm going to try that! I'm curious: how is a DP AUX adapter reference count going to solve the issue of potentially registering devices too early (i.e. before the DRM is registered)? Is it because registering too early could cause a reference count problem if somebody get a hold of the DP AUX adapter before the parent DRM device is around? Thierry
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