1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>i915_gem_track_fb</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#idp1127883116" title="Frontbuffer Tracking"><link rel="prev" href="API-intel-frontbuffer-flip.html" title="intel_frontbuffer_flip"><link rel="next" href="API-i9xx-check-fifo-underruns.html" title="i9xx_check_fifo_underruns"></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">i915_gem_track_fb</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-intel-frontbuffer-flip.html">Prev</a>&#160;</td><th width="60%" align="center">Frontbuffer Tracking</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-i9xx-check-fifo-underruns.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-i915-gem-track-fb"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>i915_gem_track_fb &#8212; 
2  update frontbuffer tracking
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">i915_gem_track_fb </b>(</code></td><td>struct drm_i915_gem_object * <var class="pdparam">old</var>, </td></tr><tr><td>&#160;</td><td>struct drm_i915_gem_object * <var class="pdparam">new</var>, </td></tr><tr><td>&#160;</td><td>unsigned <var class="pdparam">frontbuffer_bits</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1127958420"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>old</code></em></span></dt><dd><p>
4     -- undescribed --
5    </p></dd><dt><span class="term"><em class="parameter"><code>new</code></em></span></dt><dd><p>
6     -- undescribed --
7    </p></dd><dt><span class="term"><em class="parameter"><code>frontbuffer_bits</code></em></span></dt><dd><p>
8     -- undescribed --
9    </p></dd></dl></div></div><div class="refsect1"><a name="idp1127962060"></a><h2>old</h2><p>
10   current GEM buffer for the frontbuffer slots
11</p></div><div class="refsect1"><a name="idp1127962692"></a><h2>new</h2><p>
12   new GEM buffer for the frontbuffer slots
13</p></div><div class="refsect1"><a name="idp1127963324"></a><h2>frontbuffer_bits</h2><p>
14   bitmask of frontbuffer slots
15   </p><p>
16
17   This updates the frontbuffer tracking bits <em class="parameter"><code>frontbuffer_bits</code></em> by clearing them
18   from <em class="parameter"><code>old</code></em> and setting them in <em class="parameter"><code>new</code></em>. Both <em class="parameter"><code>old</code></em> and <em class="parameter"><code>new</code></em> can be NULL.
19</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-intel-frontbuffer-flip.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="ch04s02.html#idp1127883116">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-i9xx-check-fifo-underruns.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">intel_frontbuffer_flip</span>&#160;</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">&#160;<span class="phrase">i9xx_check_fifo_underruns</span></td></tr></table></div></body></html>
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