[Intel-gfx] [PATCH 6/7] drm/i915: Restart RPS using the same RP_CONTROL as from initialisation

[Szwichtenberg, Radoslaw]

On Mon, 2017-02-20 at 09:47 +0000, Chris Wilson wrote:
> During initialisation, we set different flags for different
> architectures - these should be preserved when we reload the RPS
> thresholds. If we use a mmio read, it will first ensure that the
> threshold registers are written before we apply the latch in RP_CONTROL.
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
> Cc: stable at vger.kernel.org
Reviewed-by: Radoslaw Szwichtenberg <radoslaw.szwichtenberg at intel.com>