<html>
<head>
<base href="https://bugs.freedesktop.org/">
</head>
<body>
<p>
<div>
<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [GLK] Fifo underrun when changing resolution"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100302#c8">Comment # 8</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [GLK] Fifo underrun when changing resolution"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100302">bug 100302</a>
from <span class="vcard"><a class="email" href="mailto:luis.botello.ortega@intel.com" title="Luis Botello <luis.botello.ortega@intel.com>"> <span class="fn">Luis Botello</span></a>
</span></b>
<pre>(In reply to Ander Conselvan de Oliveira from <a href="show_bug.cgi?id=100302#c6">comment #6</a>)
<span class="quote">> Created <span class=""><a href="attachment.cgi?id=130896" name="attach_130896" title="Workaround patch">attachment 130896</a> <a href="attachment.cgi?id=130896&action=edit" title="Workaround patch">[details]</a></span> <a href='page.cgi?id=splinter.html&bug=100302&attachment=130896'>[review]</a> [review]
> Workaround patch
>
> I found a better workaround. If DPF clock gating is disabled before the pipe
> scaler is enabled, the underrun doesn't happen.</span >
With this patch there is no FIFO underruns, I used this config:
======================================
Software
======================================
kernel version : 4.11.0-rc7-drm-tip-patch-ander-underrun-f7dd93d+
architecture : x86_64
bios revision : 43.30
bios release date : 04/11/2017
ksc : 1.25
xf86-video-intel (tag) : 2.99.917
xf86-video-intel (commit) : 2.99.917-771-gb57abe2
xorg-xserver : 1.18.4
libdrm : 2.4.80
vaapi (intel-driver) : Intel i965 driver for Intel(R) Geminilake -
1.8.2.pre1 (1.7.3-382-gdbe582c)
cairo : 1.15.5
xserver : X.Org X Server 1.19.99.1
dmc version : 1.4</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 QA Contact for the bug.</li>
</ul>
</body>
</html>