[Bug 72896] [BYT] DP(Port B) can't light up after loading i915 driver.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72896

--- Comment #3 from Todd Previte <tprevite at gmail.com> ---
wait_port_ready() is waiting for the PLL to lock. Status for the PLL is in the
line following that one - 
[67614.240023] timed out waiting for port B ready: 0xf000a0ff

The hotplug patch only resolves the issue of correcting the problem where DP
hotplug is not visible on ports B or D because the bits are reversed (29 vs 27)
in the definitions. So I would not expect that to have any effect on this issue
or 72897.

As for not cleaning up BIOS state, that's a likely candidate and the code I've
been working should resolve that. The new code follows the programming guide to
the letter which is alleged to be a solution for this issue.

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