[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

Daniel Vetter <daniel at ffwll.ch> changed:

           What    |Removed                     |Added
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                 CC|                            |eich at pdx.freedesktop.org

--- Comment #11 from Daniel Vetter <daniel at ffwll.ch> ---
Personally your experimental results reinforces my opinion that someone ordered
the shittiest sdvo encoder and the tiniest panel they could find and then
noticed that stuff doesn't work with a pixel mutliplier of 4.

To fix this they've frobbed the panel's mode so that it's just barely above
50MHz and this way tricked the Windows driver into picking a pixel mutliplier
of 2 without overtly offending the panel.

I share your fear for the reliability of VBT modes, but in this specific case
of SDVO-LVDS it looks like the vbt is actually more reliable. Especially if you
combine this with the fact that we've ignored the edid modes for a few years
completely. Maybe we need to double-check with egbert, but iirc the panel which
fails for him didn't have any vbt mode at all.

Egbert, can you please check whether my patch doesn't break your system?

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