[Intel-gfx] [PATCH] drm/i915: Set i9xx lvds clock limits according to specifications

Chris Wilson chris at chris-wilson.co.uk
Fri Feb 15 13:51:27 CET 2013


On Fri, Feb 15, 2013 at 12:18:49AM +0000, Chris Wilson wrote:
> On Wed, Feb 13, 2013 at 10:20:21PM +0100, Patrik Jakobsson wrote:
> > The Intel PRM says the M1 and M2 divisors must be in the range of 10-20 and 5-9.
> > Since we do all calculations based on them being register values (which are
> > subtracted by 2) we need to specify them accordingly.
> 
> One thing I've just noticed is that intel_limits_i9xx_sdvo is reused by
> g4x, so I'll double check that in the morning unless someone beats me to
> it.

Okay, so gen4 share the same values for sdvo as gen3, so we are okay in
fixing those up. However, the same offset-by-2 exists for the g4x values
of m1,m2. And one begins to suspect all the m values.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre



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