1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>drm_vblank_count</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="drm-vertical-blank.html#idp1127382092" title="Vertical Blanking and Interrupt Handling Functions Reference"><link rel="prev" href="API-drm-calc-vbltimestamp-from-scanoutpos.html" title="drm_calc_vbltimestamp_from_scanoutpos"><link rel="next" href="API-drm-crtc-vblank-count.html" title="drm_crtc_vblank_count"></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">drm_vblank_count</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-drm-calc-vbltimestamp-from-scanoutpos.html">Prev</a>&#160;</td><th width="60%" align="center">Vertical Blanking and Interrupt Handling Functions Reference</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-drm-crtc-vblank-count.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-drm-vblank-count"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>drm_vblank_count &#8212; 
2     retrieve <span class="quote">&#8220;<span class="quote">cooked</span>&#8221;</span> vblank counter value
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">u32 <b class="fsfunc">drm_vblank_count </b>(</code></td><td>struct drm_device * <var class="pdparam">dev</var>, </td></tr><tr><td>&#160;</td><td>int <var class="pdparam">crtc</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1127453908"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>dev</code></em></span></dt><dd><p>
4     DRM device
5    </p></dd><dt><span class="term"><em class="parameter"><code>crtc</code></em></span></dt><dd><p>
6     which counter to retrieve
7    </p></dd></dl></div></div><div class="refsect1"><a name="idp1127456532"></a><h2>Description</h2><p>
8   Fetches the <span class="quote">&#8220;<span class="quote">cooked</span>&#8221;</span> vblank count value that represents the number of
9   vblank events since the system was booted, including lost events due to
10   modesetting activity.
11   </p><p>
12
13   This is the legacy version of <code class="function">drm_crtc_vblank_count</code>.
14</p></div><div class="refsect1"><a name="idp1127458044"></a><h2>Returns</h2><p>
15   The software vblank counter.
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