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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [SKL BAT] *ERROR* LSPCON resume failed"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99178">99178</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[SKL BAT] *ERROR* LSPCON resume failed
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>major
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>imre.deak@intel.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<div>
<pre>LSPCON initialization still fails sometimes during system resume. The machine
is an SKL-6770HQ, LSPCON is MegaChips with revisions HW-rev 2.1 SW-rev 1.29.
The plan is to fix this by waiting with the intialization of the chip until it
asserts HPD.
[ 205.411044] [drm:lspcon_resume [i915]] LSPCON recovering in PCON mode after
356 ms
[ 205.411530] [drm:drm_dp_i2c_do_msg] native defer
[ 205.412726] [drm:drm_dp_i2c_do_msg] native defer
[ 205.413961] [drm:drm_dp_i2c_do_msg] native defer
[ 205.415168] [drm:drm_dp_i2c_do_msg] native defer
[ 205.416398] [drm:drm_dp_i2c_do_msg] native defer
[ 205.417594] [drm:drm_dp_i2c_do_msg] native defer
[ 205.418797] [drm:drm_dp_i2c_do_msg] native defer
[ 205.419504] [drm:drm_dp_i2c_do_msg] too many retries, giving up
[ 205.420002] [drm:drm_dp_i2c_do_msg] native defer
[ 205.421198] [drm:drm_dp_i2c_do_msg] native defer
[ 205.422418] [drm:drm_dp_i2c_do_msg] native defer
[ 205.423622] [drm:drm_dp_i2c_do_msg] native defer
[ 205.424817] [drm:drm_dp_i2c_do_msg] native defer
[ 205.426014] [drm:drm_dp_i2c_do_msg] native defer
[ 205.427225] [drm:drm_dp_i2c_do_msg] native defer
[ 205.427930] [drm:drm_dp_i2c_do_msg] too many retries, giving up
[ 205.427937] [drm:drm_lspcon_get_mode] *ERROR* LSPCON read(0x80, 0x41) failed
[ 205.428000] [drm:lspcon_wait_mode [i915]] *ERROR* Error reading LSPCON mode
[ 205.428055] [drm:lspcon_wait_mode [i915]] Current LSPCON mode INVALID
[ 205.428553] [drm:drm_dp_i2c_do_msg] native defer
[ 205.429750] [drm:drm_dp_i2c_do_msg] native defer
[ 205.430961] [drm:drm_dp_i2c_do_msg] native defer
[ 205.432158] [drm:drm_dp_i2c_do_msg] native defer
[ 205.433350] [drm:drm_dp_i2c_do_msg] native defer
[ 205.434564] [drm:drm_dp_i2c_do_msg] native defer
[ 205.435762] [drm:drm_dp_i2c_do_msg] native defer
[ 205.436468] [drm:drm_dp_i2c_do_msg] too many retries, giving up
[ 205.436967] [drm:drm_dp_i2c_do_msg] native defer
[ 205.438159] [drm:drm_dp_i2c_do_msg] native defer
[ 205.439399] [drm:drm_dp_i2c_do_msg] native defer
[ 205.440594] [drm:drm_dp_i2c_do_msg] native defer
[ 205.441797] [drm:drm_dp_i2c_do_msg] native defer
[ 205.443005] [drm:drm_dp_i2c_do_msg] native defer
[ 205.444202] [drm:drm_dp_i2c_do_msg] native defer
[ 205.444930] [drm:drm_dp_i2c_do_msg] too many retries, giving up
[ 205.444936] [drm:drm_lspcon_get_mode] *ERROR* LSPCON read(0x80, 0x41) failed
[ 205.445013] [drm:lspcon_change_mode.constprop.4 [i915]] *ERROR* Error
reading LSPCON mode
[ 205.445062] [drm:lspcon_resume [i915]] *ERROR* LSPCON resume failed</pre>
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