[Bug 109671] HDCP compliance sub test cases failure due to hpd timeout

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109671

--- Comment #5 from Ramalingam C <ramalingam.c at intel.com> ---
(In reply to Edward Tan from comment #3)
> Just to make it clear that there is no
> restriction for validating 1A-02 & 03 for the HDP timer which is 100ms and
> that is just a default setting value.

So can we infer that this issue doesn't block the compliance clearance?

BTW, what does this HPD_Timer setting stand for? Duration for which monitor is
off(plugged out)?

>From the log attached, we can see that after the hot-unplug and hot-plug HDCP
src is not starting the authentication.

Two reasons possible:
1. During hotplug out, EDID is still available on DDC. But since with larger
HPD_Timer, this is working. so this is ruled out.
2. I915 is not processing the Hotplug event within 100mSec!? regression in 5.0?
as it is ok with the older kernel.

Few more basic questions to understand the compliance setup:
1. How do you initiate the HDCP authentication from userspace?
2. For each hot-plug event, we need to start the rendering of FB and then HDCP
authentication. How are we doing it?

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