<html><head></head><body><div style="font-family: Verdana;font-size: 12.0px;"><div>Hi, Folks!</div>
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<div>I'am looking for an opportunity to access the I2C-Interface which is attached to my displayport link.</div>
<div>Can anyone give me a hint aubout an minimal working example for this?</div>
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<div>I tried to figure aut how this could be solved using the linux userspace, but for me it looks like i have to implement my own driver</div>
<div>according to <a href="https://www.kernel.org/doc/htmldocs/drm/ch02s05.html#idp10812112">https://www.kernel.org/doc/htmldocs/drm/ch02s05.html#idp10812112</a> this should be done by describing an</div>
<div><span style="font-family: 'Times New Roman'; line-height: normal;">drm_dp_aux_msg structure, which is passed into a driver's .</span><code class="function" style="line-height: normal;">transfer</code><span style="font-family: 'Times New Roman'; line-height: normal;"> implementation.</span></div>
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<div>Furthermore i was looking into some packages (the working machine runs an ArchLinux-Distro) which where provided.</div>
<div>$ extra/libdrm 2.4.60-2 :Userspace interface to kernel DRM services</div>
<div>$ extra/libva-intel-driver 1.5.1-1 : VA-API implementation for Intel G45 and HD Graphics family (the working machine has an Intel HD4000 GPU)</div>
<div>But none of them does provide such helper functions.</div>
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<div>Thank you for your time, with kind Regards,</div>
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<div>Marc</div></div></body></html>