[Intel-gfx] [PATCH 32/38] drm/i915: Defer request emission

[Joonas Lahtinen]

On ti, 2016-09-20 at 09:30 +0100, Chris Wilson wrote:
> Move the actual emission of the request (the closing breadcrumb) from
> i915_add_request() to the submit callback. (It can be moved later when
> required.) This allows us to defer the allocation of the global_seqno
> from request construction to actual submission, allowing us to emit the
> requests out of order (wrt to the order of their construction, they
> still will only be executed one all of their dependencies are resolved
> including that all earlier requests on their timeline have been
> submitted.) We have to specialise how we then emit the request in order
> to write into the preallocated space, rather than at the tail of the
> ringbuffer (which will have been advanced by the addition of new
> requests).

No changelog, so assuming *out++ style change is the only one.

Reviewed-by: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>

Regards, Joonas
-- 
Joonas Lahtinen
Open Source Technology Center
Intel Corporation