Getting EDID pretending working correctly is a pain. You can see our pain regarding EDID in the HDMI2USB project at https://github.com/timvideos/HDMI2USB/issues/105

There are a bunch of other Open Source projects which all work on manipulating EDID, they include;

• Bunny Hung's NeTV FPGA firmware - https://github.com/bunnie/netv-fpga/tree/master/sources_1/imports/release1

• VOC's EDID Injector - https://github.com/datenwolf/vgaedidinjector (which I have a low cost version in progress for HDMI at https://github.com/mithro/timvideos-edid-injector)

• Hamsterworks projects (with lots more at http://hamsterworks.co.nz/mediawiki/index.php/FPGA_Projects )

  • HDMI Input - http://hamsterworks.co.nz/mediawiki/index.php/HDMI_Input
  • EDID ROM - http://hamsterworks.co.nz/mediawiki/index.php/EDID_ROM

• misoc / migen for MilkyMist at https://github.com/m-labs/misoc/blob/master/misoclib/video/dvisampler/edid.py

• Stephan Warren's "HDMI Tester" - https://github.com/swarren/hdmi-tester (post from Stephan Warren about his EDID stuff - https://plus.google.com/+StephenWarren/posts/7SH3Dn4y4go).

Enabling EDID debugging on Ubuntu (thanks to David Airlie)

echo 6 > /sys/module/drm/parameters/debug

Documentation/EDID
drivers/gpu/drm/i915/intel_i2c.c
drivers/gpu/drm/drm_edid.c

https://01.org/linuxgraphics/documentation/2013-intel-core-processor-family