1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>intel_set_cpu_fifo_underrun_reporting</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-i9xx-check-fifo-underruns.html" title="i9xx_check_fifo_underruns"><link rel="next" href="API-intel-set-pch-fifo-underrun-reporting.html" title="intel_set_pch_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">intel_set_cpu_fifo_underrun_reporting</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-i9xx-check-fifo-underruns.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-pch-fifo-underrun-reporting.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-intel-set-cpu-fifo-underrun-reporting"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>intel_set_cpu_fifo_underrun_reporting &#8212; 
2     set cpu fifo underrrun reporting state
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">bool <b class="fsfunc">intel_set_cpu_fifo_underrun_reporting </b>(</code></td><td>struct drm_i915_private * <var class="pdparam">dev_priv</var>, </td></tr><tr><td>&#160;</td><td>enum pipe <var class="pdparam">pipe</var>, </td></tr><tr><td>&#160;</td><td>bool <var class="pdparam">enable</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1127981172"></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><dt><span class="term"><em class="parameter"><code>pipe</code></em></span></dt><dd><p>
6     (CPU) pipe to set state for
7    </p></dd><dt><span class="term"><em class="parameter"><code>enable</code></em></span></dt><dd><p>
8     whether underruns should be reported or not
9    </p></dd></dl></div></div><div class="refsect1"><a name="idp1127984868"></a><h2>Description</h2><p>
10   This function sets the fifo underrun state for <em class="parameter"><code>pipe</code></em>. It is used in the
11   modeset code to avoid false positives since on many platforms underruns are
12   expected when disabling or enabling the pipe.
13   </p><p>
14
15   Notice that on some platforms disabling underrun reports for one pipe
16   disables for all due to shared interrupts. Actual reporting is still per-pipe
17   though.
18   </p><p>
19
20   Returns the previous state of underrun reporting.
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