E-EDID support: read out extension blocks

Christophe Oosterlynck christophe.oosterlynck at dzine.be
Tue Aug 14 06:47:39 PDT 2012

Hi all,

to be HDMI compliant, extension blocks provided by E-EDID should be read
out. It seems that X doesn't do this.

I've been browsing through the code and found a commit [1] which introduced
the 'complete' parameter to xf86DoEEDID. This is being called with
complete=FALSE from xf86DoEDID_DDC2 [2]. I was wondering why and if there
is any other code path where this function is called with complete=TRUE? Or
doesn't X support reading out extensions blocks by default and can it only
be done by calling xf86DoEEDID myself?

[2] http://cgit.freedesktop.org/xorg/xserver/tree/hw/xfree86/ddc/ddc.c#n468

Best regards,

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