[Intel-gfx] [PATCH] drm/i915: Retry reading DPCD when bogus values are read

[Daniel Vetter]

On Mon, Nov 25, 2013 at 4:52 PM, Takashi Iwai <tiwai at suse.de> wrote:
>> A few questions:
>> - Has anyone checked whether the same panel (I guess this is about edp)
>>   also fails in the same way on other chips? Maybe with a dual gpu
>>   solution?
>
> I should have mentioned more clearly that this was about the real DP
> monitor, not eDP.  I haven't seen this problem with eDP.

Then I'd really like to know what happens on other platforms, both
intel and non-intel.

>> - Jesse has a patch somewhere, please test the diff embedded in this bz
>>   comment:
>>
>> https://bugs.freedesktop.org/show_bug.cgi?id=67245#c29
>>
>>   Could be that we have an issue with the panel power timings.
>
> I guess this is only about eDP?

Yeah, this is just an eDP-only issue that Jesse's patch addresses.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch