[PATCH v3 03/20] drm/dp: Move i2c init to drm_dp_aux_init, add __must_check and fini

[Thierry Reding]

On Thu, Apr 22, 2021 at 01:18:09PM -0400, Lyude Paul wrote:
> On Tue, 2021-04-20 at 02:16 +0300, Ville Syrjälä wrote:
> > 
> > The init vs. register split is intentional. Registering the thing
> > and allowing userspace access to it before the rest of the driver
> > is ready isn't particularly great. For a while now we've tried to
> > move towards an architecture where the driver is fully initialzied
> > before anything gets exposed to userspace.
> 
> Yeah-thank you for pointing this out. Thierry - do you think there's an
> alternate solution we could go with in Tegra to fix the get_device() issue
> that wouldn't require us trying to expose the i2c adapter early?

I suppose we could do it in a hackish way that grabs a reference to the
I2C adapter only upon registration. We can't do that for the regular I2C
DDC case where the I2C controller is an external one because by the time
we get to registration it could've gone again. This would make both code
paths asymmetric, so I'd prefer not to do it. Perhaps it could serve as
an stop-gap solution until something better is in place, though.

Thierry
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