Re: [PATCH] omap2+: add drm device

Gross, Andy
2012-03-06T15:50:32Z

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On Tue, Mar 6, 2012 at 8:35 AM, Tomi Valkeinen <tomi.valkeinen@ti.com>wrote:
>
>
> I have to say I don't know much about DMM, but my understanding is that
> DMM is a bigger entity, of which TILER is only a small part, and DMM
> manages all memory accesses.
>
> Can there be other users for the DMM than DRM? I know there could be
> other users for the TILER, and I know you want to combine that with the
> DRM driver, but I'm wondering about the other parts of DMM than the
> TILER.
>
> Somehow having a DMM driver inside omapdrm sounds strange.

The DMM does indeed contain a number of entities. However, the TILER
portion is the only part that requires a driver. All other register
modifications (LISA map settings, EMIF, etc) are done statically in the
loader or u-boot and never changed again. As such, DMM has become
synonymous with TILER.

Regards,

Andy

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