drm/i915: Explain why we need to write DPLL twice
authorChris Wilson <chris@chris-wilson.co.uk>
Fri, 3 Dec 2010 21:13:16 +0000 (21:13 +0000)
committerChris Wilson <chris@chris-wilson.co.uk>
Sun, 5 Dec 2010 00:37:35 +0000 (00:37 +0000)
... it's because setting the Pixel Multiply bits only takes effect once
the PLL is enabled and stable.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

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