[Intel-gfx] [PATCH 1/2] drm/i915: enable HiZ Raw Stall Optimization on HSW

[Matt Turner]

On Wed, Jan 29, 2014 at 9:56 AM, Daniel Vetter <daniel at ffwll.ch> wrote:
> On Tue, Jan 28, 2014 at 6:29 AM, Chia-I Wu <olvaffe at gmail.com> wrote:
>> From: Chia-I Wu <olv at lunarg.com>
>>
>> The optimization is available on Ivy Bridge and later, and is disabled by
>> default.  Enabling it helps certain workloads such as GLBenchmark TRex test.
>>
>> No piglit regression.
>>
>> v2
>>  - no need to save the register before suspend as init_clock_gating can
>>    correctly program it after resume
>>  - split IVB change to another commit
>>
>> Signed-off-by: Chia-I Wu <olv at lunarg.com>
>
> What about byt?
> -Daniel

In the previous thread, Ville pointed out that the documentation
doesn't say anything about BYT for this bit, so it's unknown whether
it's supported, and Chia-I said

> Though I will leave BDW/VLV out as I do not have the hardware.

I do have BYT, so I'll check it out, but this patch can go in without
it that information, since Chia-I took Ville's advice and split the
patches into per-generation hunks.