1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>i9xx_check_fifo_underruns</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux DRM Developer's Guide"><link rel="up" href="ch04s02.html#idp1127966068" title="Display FIFO Underrun Reporting"><link rel="prev" href="API-i915-gem-track-fb.html" title="i915_gem_track_fb"><link rel="next" href="API-intel-set-cpu-fifo-underrun-reporting.html" title="intel_set_cpu_fifo_underrun_reporting"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">i9xx_check_fifo_underruns</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-i915-gem-track-fb.html">Prev</a>&#160;</td><th width="60%" align="center">Display FIFO Underrun Reporting</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-intel-set-cpu-fifo-underrun-reporting.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-i9xx-check-fifo-underruns"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>i9xx_check_fifo_underruns &#8212; 
2  check for fifo underruns
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">void <b class="fsfunc">i9xx_check_fifo_underruns </b>(</code></td><td>struct drm_i915_private * <var class="pdparam">dev_priv</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1127972924"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>dev_priv</code></em></span></dt><dd><p>
4     i915 device instance
5    </p></dd></dl></div></div><div class="refsect1"><a name="idp1127974540"></a><h2>Description</h2><p>
6   This function checks for fifo underruns on GMCH platforms. This needs to be
7   done manually on modeset to make sure that we catch all underruns since they
8   do not generate an interrupt by themselves on these platforms.
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