[Bug 65524] [sdvo lvds regression] "Use &intel_sdvo->ddc instead of intel_sdvo->i2c for DDC"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=65524

--- Comment #12 from Egbert Eich <eich at pdx.freedesktop.org> ---
I'm positive that your patch will not harm the TGCS (foermerly IBM) POS system
on which I discovered that reading EDID was broken.
For entertainment let me share the story that led to this discovery:
The vendor's QA complained that the driver we ship in the next SP (SP3) of our
enterprise product only allows to set an 800x600 mode on the built-in 1024x768
panel correctly when the VBIOS option "Windows 7" is selected but not when "All
Others" is set. The additional claim that this used to work with SP1 let me to
investigate the issue further: it turned out that the 'Windows 7' VBIOS
contained a VBT table, while the other one didn't. A test with the SP1 kernel
revealed that on this kernel the panel provided an EDID thus the fixed panel
mode was set even in the absence of a VBT.
The rest was then easy to spot.

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