[PATCH] drm/radeon: fix regression on atom cards with hardcoded EDID record.

[Dave Airlie]

On Mon, May 2, 2011 at 4:26 AM, Alex Deucher <alexdeucher at gmail.com> wrote:
> On Sun, May 1, 2011 at 6:16 AM, Dave Airlie <airlied at gmail.com> wrote:
>> From: Dave Airlie <airlied at redhat.com>
>>
>> Since fafcf94e2b5732d1e13b440291c53115d2b172e9 introduced an edid size, it seems to have broken this path.
>>
>> This manifest as oops on T500 Lenovo laptops with dual graphics primarily.
>>
>> Should fix: https://bugzilla.kernel.org/show_bug.cgi?id=33812
>>
>> Signed-off-by: Dave Airlie <airlied at redhat.com>
>> cc: stable at kernel.org
>
> Reviewed-by: Alex Deucher <alexdeucher at gmail.com>
>
> Although, I think there may be a problem with the mux switching since
> we shouldn't hit the hardcoded EDID unless DDC fails.

I've avoided having to do a MUX switch for DDC so far since I've no
idea how to enumerate what the MUX is attached to properly.

The good thing is the table has worked fine up until now.

Dave.