[PATCH 07/16] modesetting: reverse prime support (v1.1)

[Eric Anholt]

Dave Airlie <airlied at gmail.com> writes:

> This adds support for reverse prime to the modesetting driver.
>
> Reverse prime is where we have two GPUs in the display chain,
> but the second GPU can't scanout from the shared pixmap, so needs
> an extra copy to the on screen pixmap.
>
> This allows modesetting to support this scenario while still
> supporting the USB offload one.
>
> v1.1:
> fix comment + ret = bits (Eric)

Looks nicer, thanks!  This and patch 11-15 are:

Reviewed-by: Eric Anholt <eric at anholt.net>

Patch 16 is:

Acked-by: Eric Anholt <eric at anholt.net>

(I don't think I'll get around to doing proper review in time, but I've
spent a bunch of time in past revisions of the code, and I think it's
good enough that it's time we merged it so that we start working on the
code inside of version control instead of outside).
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