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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Kernel DRM/i915 init sends eDP panel into self-test loop"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94338#c16">Comment # 16</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Kernel DRM/i915 init sends eDP panel into self-test loop"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94338">bug 94338</a>
from <span class="vcard"><a class="email" href="mailto:ville.syrjala@linux.intel.com" title="Ville Syrjala <ville.syrjala@linux.intel.com>"> <span class="fn">Ville Syrjala</span></a>
</span></b>
<pre>(In reply to Ville Syrjala from <a href="show_bug.cgi?id=94338#c13">comment #13</a>)
<span class="quote">> OK. So now the question becomes is the EDID failure expected, and if so how
> are we actually supposed to fine the timings for the panel in the VBT. At
> least the panel type in block 40 seems bogus.
>
> The spec says:
>
> "Panel Type
> This field specifies the LFP panel index for the LFP panel present in the
> platform.
> Note: This field is deprecated and to be obsoleted. It is recommended to use
> the Panel Type from the Display Device data structure of the corresponding
> LFP display."
>
> but there is no panel type in the aforementioned structure in block 2.
>
> Jani, did we ever find out what this note really means?</span >
Just to answer myself here, I found something nice in Opregion that might help.
If there's a chance of retesting with this particular machine, I'd rather like
to know the results with this included:
commit a05628195a0d9f3173dd9aa76f482aef692e46ee
Author: Ville Syrjälä <<a href="mailto:ville.syrjala@linux.intel.com">ville.syrjala@linux.intel.com</a>>
Date: Mon Apr 11 10:23:51 2016 +0300
drm/i915: Get panel_type from OpRegion panel details</pre>
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