Re: [PATCH 0/2] Associate ddc adapters with connectors

From: Daniel Vetter
Date: Tue Jun 25 2019 - 10:20:38 EST

On Tue, Jun 25, 2019 at 03:10:32PM +0100, Russell King - ARM Linux admin wrote:
> On Tue, Jun 25, 2019 at 04:07:55PM +0200, Daniel Vetter wrote:
> > Otherwise I like this. Biggest problem I'm seeing here is rolling this out
> > everywhere, this is a lot of work. And without widespread adoptions it's
> > not terribly useful for userspace.
> There will be cases where it's not possible, because the I2C bus is
> hidden behind a chip that doesn't give you direct access to the DDC
> bus.

Oh sure, plus lots of connectors where there's just not ddc bus at all.
But if we only roll this out for a handful of drivers it's also not great,
that's what I meant. Looking at

$ git grep drm_do_get_edid

there's only very few drivers where the ddc bus is hidden. There's a lot
more where it's not, and I think a big series to tackle those would serve
extremely well to make a case for this sysfs link.
Daniel Vetter
Software Engineer, Intel Corporation