<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>drm_do_get_edid</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="ch02s05.html#idp332873012" title="EDID Helper Functions Reference"><link rel="prev" href="API-drm-edid-is-valid.html" title="drm_edid_is_valid"><link rel="next" href="API-drm-probe-ddc.html" title="drm_probe_ddc"></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_do_get_edid</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-drm-edid-is-valid.html">Prev</a> </td><th width="60%" align="center">EDID Helper Functions Reference</th><td width="20%" align="right"> <a accesskey="n" href="API-drm-probe-ddc.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-drm-do-get-edid"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>drm_do_get_edid —
get EDID data using a custom EDID block read function
</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">struct edid * <b class="fsfunc">drm_do_get_edid </b>(</code></td><td>struct drm_connector * <var class="pdparam">connector</var>, </td></tr><tr><td> </td><td>int (*<var class="pdparam">get_edid_block</var>)
<code>(</code>void *data, u8 *buf, unsigned int block, size_t len<code>)</code>, </td></tr><tr><td> </td><td>void * <var class="pdparam">data</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a name="idp332905644"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>connector</code></em></span></dt><dd><p>
connector we're probing
</p></dd><dt><span class="term"><em class="parameter"><code>get_edid_block</code></em></span></dt><dd><p>
EDID block read function
</p></dd><dt><span class="term"><em class="parameter"><code>data</code></em></span></dt><dd><p>
private data passed to the block read function
</p></dd></dl></div></div><div class="refsect1"><a name="idp332909340"></a><h2>Description</h2><p>
When the I2C adapter connected to the DDC bus is hidden behind a device that
exposes a different interface to read EDID blocks this function can be used
to get EDID data using a custom block read function.
</p><p>
As in the general case the DDC bus is accessible by the kernel at the I2C
level, drivers must make all reasonable efforts to expose it as an I2C
adapter and use <code class="function">drm_get_edid</code> instead of abusing this function.
</p></div><div class="refsect1"><a name="idp332910860"></a><h2>Return</h2><p>
Pointer to valid EDID or NULL if we couldn't find any.
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