Re: [Intel-gfx] [PATCH 13/14] drm/i915: add some barriers when changing DIPs

2012-05-30 Thread Daniel Vetter
On Mon, May 28, 2012 at 04:43:00PM -0300, Paulo Zanoni wrote: > From: Paulo Zanoni > > On IVB and older, we basically have two registers: the control and the > data register. We write a few consecutitve times to the control > register, and we need these writes to arrive exactly in the specified >

[Intel-gfx] [PATCH 13/14] drm/i915: add some barriers when changing DIPs

2012-05-28 Thread Paulo Zanoni
From: Paulo Zanoni On IVB and older, we basically have two registers: the control and the data register. We write a few consecutitve times to the control register, and we need these writes to arrive exactly in the specified order. Also, when we're changing the data register, we need to guarantee