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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 - NULL pointer dereference in intel_pipe_will_have_type() triggered from vlv_compute_dpll()"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94995">94995</a>
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<th>Summary</th>
<td>NULL pointer dereference in intel_pipe_will_have_type() triggered from vlv_compute_dpll()
</td>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>DRI git
</td>
</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>critical
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>DRM/Intel
</td>
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<th>Assignee</th>
<td>ville.syrjala@linux.intel.com
</td>
</tr>
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<th>Reporter</th>
<td>marius.c.vlad@intel.com
</td>
</tr>
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<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>
<tr>
<th>i915 platform</th>
<td>BYT
</td>
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<th>i915 features</th>
<td>display/DSI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=123030" name="attach_123030" title="stacktrace">attachment 123030</a> <a href="attachment.cgi?id=123030&action=edit" title="stacktrace">[details]</a></span>
stacktrace
Reloading the module (tests/drv_module_reload) causes a NULL pointer
dereference on BYT.
The culprit seems to be:
cd2d34d drm/i915: Setup DPLL/DPLLMD for DSI too on VLV/CHV
Check quickly and it seems that crtc_state->base.state is NULL when reloading
the driver.
>From the following integration manifest:
e51a1e3 drm-intel-nightly: 2016y-04m-15d-13h-26m-14s UTC integration manifest
234126c drm/i915: Reject 'Center' scaling mode for eDP/DSI on GMCH platforms
f4ee265 drm/i915: Hook up pfit for DSI
062efa5 drm/i915: Eliminate {vlv,bxt}_configure_dsi_pll()
47eacba drm/i915: Compute DSI PLL parameters during .compute_config()
cd2d34d drm/i915: Setup DPLL/DPLLMD for DSI too on VLV/CHV
da6110b drm/i915/bxt: PORT_PLL_REF_SEL bit should be set for all BXT variations
ab24353 drm-intel-nightly: 2016y-04m-15d-13h-02m-57s UTC integration manifest
Tried w/:
commit b1acc63c4301f12ef2ca31872d937641aaf3c9dc
Author: Ville Syrjälä <<a href="mailto:ville.syrjala@linux.intel.com">ville.syrjala@linux.intel.com</a>>
Date: Mon Apr 18 18:56:14 2016 +0300
drm-intel-nightly: 2016y-04m-18d-15h-55m-43s UTC integration manifest</pre>
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