[Intel-gfx] [PATCH 03/10] drm/i915: gen 9 h/w w/a (WaDisablePartialInstShootdown)

[Nick Hoath]

On 06/02/2015 08:52, Daniel Vetter wrote:
> On Thu, Feb 05, 2015 at 05:51:46PM +0000, Damien Lespiau wrote:
>> On Thu, Feb 05, 2015 at 10:47:18AM +0000, Nick Hoath wrote:
>>> From: "Hoath, Nicholas" <nicholas.hoath at intel.com>
>>>
>>> Add:
>>> WaDisablePartialInstShootdown
>>
>> Just an editor note: that's not really additional information compared
>> to the subject of the patch. Also subject message could be a bit more
>> direct and mention SKL:
>>
>>    drm/i915/skl: Implement WaDisablePartialInstShootdown
>
> Well it's gen9 but yeah. The commit message body should explain the
> commit (e.g. more details on impact), but for w/a that's only really
> required if there's been an outside report.
So an empty body is ok if the subject has sufficient information?
>
>>> v1: Dont add WaDisableThreadStallDopClockGating as not SKL WA. (Found by Damien Lespiau)
>>
>> v2, v1 was the original patch. Commit messages should also be wrapped
Ah, I thought we were software engineers so started counting at 0 :)
>> like emails, so 90 chars is too long.
>>
>> Reviewed-by: Damien Lespiau <damien.lespiau at intel.com>
>
> Frobbed commit while applying.
> -Daniel
>>
>>> Signed-off-by: Nick Hoath <nicholas.hoath at intel.com>
>>> ---
>>>   drivers/gpu/drm/i915/intel_ringbuffer.c | 7 +++++++
>>>   1 file changed, 7 insertions(+)
>>>
>>> diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
>>> index fbfe65a..b869f1c 100644
>>> --- a/drivers/gpu/drm/i915/intel_ringbuffer.c
>>> +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
>>> @@ -875,6 +875,13 @@ static int chv_init_workarounds(struct intel_engine_cs *ring)
>>>
>>>   static int gen9_init_workarounds(struct intel_engine_cs *ring)
>>>   {
>>> +	struct drm_device *dev = ring->dev;
>>> +	struct drm_i915_private *dev_priv = dev->dev_private;
>>> +
>>> +	/* WaDisablePartialInstShootdown:skl */
>>> +	WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN,
>>> +			  PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE);
>>> +
>>>   	return 0;
>>>   }
>>>
>>> --
>>> 2.1.1
>>>
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>