[Bug 28774] RS780: No picture over HDMI

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https://bugs.freedesktop.org/show_bug.cgi?id=28774

--- Comment #11 from Alex Deucher <agd5f@xxxxxxxxx> 2010-06-28 22:38:29 PDT ---
On avivo chips, the display regs start at 0x6000 (crtcs/grph/cur/etc.) and the
output regs start at 0x7000 (dacs/dig/etc.).  They only relevant register in
your dump that's different is 0x75a0 (DIG_CNTL) and the only difference is that
dig mode (DVI vs HDMI) either of which should work fine.  I think the problem
lies in the north bridge pcie config regs as the HDMI port uses the PCIEPHY
transmitter which shares lanes with the northbrigde.  I'm trying to get some
better info on how it's supposed to work to help debug it.

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