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<body><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> changed
<a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Reading EDID on valleyview(device id: 0x0f31) fails"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97971">bug 97971</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>NEW
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<td>NEEDINFO
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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Reading EDID on valleyview(device id: 0x0f31) fails"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97971#c8">Comment # 8</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Reading EDID on valleyview(device id: 0x0f31) fails"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97971">bug 97971</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 Jani Nikula from <a href="show_bug.cgi?id=97971#c5">comment #5</a>)
<span class="quote">> 杨波, can you get /sys/kernel/debug/dri/0/i915_vbt or
> /sys/kernel/debug/dri/0/i915_opregion from the original reporter?
>
> Ville, any idea if we should be looking at some other ddc pin in the VBT, or
> is the IS_VALLEYVIEW() thing all right? Are there any machines that would
> have both VGA and DVI connectors, or does having DVI always mean that the
> VGA is routed to DVI-I?</span >
I didn't realize we even had machines with DVI-I. I've only ever seen separate
DVI-D + VGA myself.
I would be rather surprised if there's a VLV machine with DVI-I. But who knows,
I've been known to be wrong occasionally. So the key question here is; Does the
machine have DVI-I, or just HDMI/DVI-D using non-standard DDC pins?
As far as finding the right DDC pin goes, I think VBT has both the global CRT
DDC pin, and the per-child device DDC pin. We only look at the global thing I
believe. Dunno if we should be looking at the other one.</pre>
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