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<body><span class="vcard"><a class="email" href="mailto:jwrdegoede@fedoraproject.org" title="Hans de Goede <jwrdegoede@fedoraproject.org>"> <span class="fn">Hans de Goede</span></a>
</span> changed
<a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [BYT dsi] Black screen on modesetting with Dell Venue 8 Pro (version with screen with MIPI panel index = 3)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=82880">bug 82880</a>
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<table border="1" cellspacing="0" cellpadding="8">
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<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
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<td style="text-align:right;">Resolution</td>
<td>FIXED
</td>
<td>---
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<td style="text-align:right;">CC</td>
<td>
</td>
<td>jwrdegoede@fedoraproject.org
</td>
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<td style="text-align:right;">Summary</td>
<td>[BYT dsi] Black screen on modesetting with Dell Venue 8 Pro (older firmware) on 3.16.x
</td>
<td>[BYT dsi] Black screen on modesetting with Dell Venue 8 Pro (version with screen with MIPI panel index = 3)
</td>
</tr>
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<td style="text-align:right;">Status</td>
<td>CLOSED
</td>
<td>REOPENED
</td>
</tr></table>
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<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [BYT dsi] Black screen on modesetting with Dell Venue 8 Pro (version with screen with MIPI panel index = 3)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=82880#c39">Comment # 39</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [BYT dsi] Black screen on modesetting with Dell Venue 8 Pro (version with screen with MIPI panel index = 3)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=82880">bug 82880</a>
from <span class="vcard"><a class="email" href="mailto:jwrdegoede@fedoraproject.org" title="Hans de Goede <jwrdegoede@fedoraproject.org>"> <span class="fn">Hans de Goede</span></a>
</span></b>
<pre>I don't think this has anything to do with the firmware version on the Dell
Venue 8 5130. Mine is working fine, but as reported e.g. also in <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [i915][BYT] Blank screen on DSI panel"
href="show_bug.cgi?id=101205">bug 101205</a>
(which is really about Pipo devices) their are 2 different versions of the Dell
Venue 8 5130. With different panels, the working one has:
Jan 01 01:42:14 phone kernel: [drm:intel_bios_init [i915]] Found MIPI Config
block, panel index = 5
Jan 01 01:42:14 phone kernel: [drm:intel_bios_init [i915]] No MIPI Sequence
found, parsing complete
Where as the broken one has:
Mar 10 10:10:24 phone kernel: [drm:intel_bios_init [i915]] Found MIPI Config
block, panel index = 3
Mar 10 10:10:24 phone kernel: [drm:intel_bios_init [i915]] Found MIPI sequence
block v1
Note different panel indexes and if you look at the logs in <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [i915][BYT] Blank screen on DSI panel"
href="show_bug.cgi?id=101205">bug 101205</a>, which
contains logs for both a good and a bad unit then you will also see different
timings.
Jan Brummer has send me a Dell Venue 8 5130 with the trouble-some screen so
that I could take a shot at fixing this.
I've actually managed to find the problem and I've a patch ready, but it is not
pretty...
In the mean time lets open this bug for proper tracking of this until the
problem is fixed on units with a panel index of 3.</pre>
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