[PATCH 1/2] drm: allow drivers to provide their own EDID fetching routine

Jesse Barnes jbarnes at virtuousgeek.org
Tue Jul 20 16:05:47 PDT 2010

On Wed, 21 Jul 2010 08:54:30 +1000
Dave Airlie <airlied at redhat.com> wrote:

> On Tue, 2010-07-20 at 15:44 -0700, Jesse Barnes wrote:
> > Make drm_edid_read take a new argument, edid_read, to allow drivers to
> > provide their own EDID fetch routine.  Export the bit banging DDC over
> > i2c version of the EDID fetching routine and make the drivers use it.
> > This sets the stage for GMBUS support in the Intel driver.
> > 
> I think this needs some rework.
> You might want to checkout what the radeon driver does for hw i2c
> engine. You should set up your own i2c hw handlers and use those instead
> of bypassing the i2c stack. GMBUS is just another i2c hw block.

I'll check it out, but I don't see what using the i2c stack buys us
here except for obfuscation...

Jesse Barnes, Intel Open Source Technology Center

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