[PATCH] drm/radeon: don't mess with hot plug detect for eDP or LVDS connector v2

[Jerome Glisse]

On Wed, May 9, 2012 at 9:40 AM, Alex Deucher <alexdeucher at gmail.com> wrote:
> On Fri, May 4, 2012 at 11:06 AM,  <j.glisse at gmail.com> wrote:
>> From: Jerome Glisse <jglisse at redhat.com>
>>
>> It seems imac pannel doesn't like whe we change the hot plug setup
>> and then refuse to work. This help but doesn't fully fix:
>> https://bugzilla.redhat.com/show_bug.cgi?id=726143
>
> How does it help?  Does it fix the the aux problems, but the monitor
> still doesn't train?  What's the working value of the relevant
> DC_HPD*_CONTROL register?
>
> Alex

Don't have the hw but somehow the way we program this reg completely
disable the panel, after that the panel doesn't answer to anything
(nor i2c nor any aux transaction). Without programming that link
training is successfull but panel stays black. I can ask to get the
value before and after.

Cheers,
Jerome