<html>
<head>
<base href="https://bugs.freedesktop.org/">
</head>
<body>
<p>
<div>
<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [CHV] Backlight init fails on Surface 3 if module load order is wrong"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96571#c11">Comment # 11</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [CHV] Backlight init fails on Surface 3 if module load order is wrong"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96571">bug 96571</a>
from <span class="vcard"><a class="email" href="mailto:viric@viric.name" title="viric@viric.name">viric@viric.name</a>
</span></b>
<pre>This is the i915 code that tries to find the pwm-backlight controller:
<a href="http://lxr.free-electrons.com/source/drivers/gpu/drm/i915/intel_panel.c#L1636">http://lxr.free-electrons.com/source/drivers/gpu/drm/i915/intel_panel.c#L1636</a>
that controller is added in drivers/video/backlight/pwm_bl.c , but not for ACPI
systems like my LPSS and, I guess, also this crystalcove. Someone should add
ACPI code to pwm_bl.c to handle those ACPI PWM devices, because it only works
for non-ACPI (very few x86, with devicetree, CONFIG_OF).
I have very little idea of kernel developing and I may be wrong, but that is
how I understand the situation.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
<li>You are the assignee for the bug.</li>
<li>You are the QA Contact for the bug.</li>
</ul>
</body>
</html>