[Bug 59982] Radeon: evergreen Atombios in loop during initialization on ppc64

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=59982

--- Comment #24 from Alex Deucher <agd5f at yahoo.com> ---
If the card is not posted by the sbios, the display hardware is disabled until
the driver attempts to initialize it.  The display controller enable bit is bit
0 of CRTC_CONTROL (0x6e70 + crtc_offset).  The DAC enable bit is bit 0 of
DAC_ENABLE (0x6790).

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