[Intel-gfx] [PATCH 10/10] drm/i915: Fix intel_dp_hot_plug()

[Todd Previte]

On 10/9/14 8:38 PM, Dave Airlie wrote:
> On 10 October 2014 01:49, Chris Wilson <chris at chris-wilson.co.uk> wrote:
>> On Thu, Oct 09, 2014 at 08:38:10AM -0700, Todd Previte wrote:
>>> The hot plug function for DP appears to have been broken somewhere along the way. Without
>>> this function being operational, hot plug events are not correctly received for compliance
>>> testing. This patch implements the necessary functionality to resolve that issue.
>> Perhaps a discussion of why it was removed and how the apparent conflict
>> should be resolved?
>>
>> In particular citing the commit that gutted the function and cc'ing the
>> author (Dave Airlie) and reviwers (you) are in order.
>>
>> commit 0e32b39ceed665bfa4a77a4bc307b6652b991632
>> Author: Dave Airlie <airlied at redhat.com>
>> Date:   Fri May 2 14:02:48 2014 +1000
>>
>>      drm/i915: add DP 1.2 MST support (v0.7)
> I'm sure this shouldn't be needed as we get short/long hotplug DP
> events in the pulse handler,
> not here.
>
> Dave.
Sounds good. Looking at the HPD pulse handler, I think I can get the 
necessary code in there for the non-MST case to get compliance testing 
working with just the pulse handler. The short pulse will catch it 
already, but I need to add code to the long pulse segment in order to 
get the correct notification there.

-T