On Fri, 29 Jul 2011 10:50:11 -0700, Jesse Barnes <[email protected]> 
wrote:

> +     flags |= FDI_PHASE_SYNC_OVR(pipe);
> +     I915_WRITE(SOUTH_CHICKEN1, flags); /* once to unlock... */
> +     flags |= FDI_PHASE_SYNC_EN(pipe);
> +     I915_WRITE(SOUTH_CHICKEN1, flags); /* then again to enable */
> +     POSTING_READ(SOUTH_CHICKEN1);
> +}

ooh, this even makes the sequence of two writes sound sensible.

Reviewed-by: Keith Packard <[email protected]>

You didn't happen to check the register values after doing this, did
you? Just to verify that all of the crazy math works, given that we
can't actually test whether this fixes anything.

-- 
[email protected]

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