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    SubjectRe: [PATCH] drm/i915: By default, enable RC6 on IVB and SNB when reasonable
    On Fri, Nov 18, 2011 at 10:41:29PM -0800, Keith Packard wrote:

    > + /*
    > + * Only enable RC6 if all dma remapping is disabled, or if
    > + * there's no iommu present in the machine.
    > + */
    > + if (INTEL_INFO(dev)->gen == 6)
    > + return no_iommu || dmar_disabled;

    So the user has to choose between 5W of power saving or having dmar? And
    we default to giving them dmar? I think that's going to come as a
    surprise to people.

    --
    Matthew Garrett | mjg59@srcf.ucam.org


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