[Intel-gfx] [PATCH] drm/i915/guc: Removed unused GuC parameters.

Sagar Arun Kamble sagar.a.kamble at intel.com
Thu Mar 1 12:05:36 UTC 2018

On 3/1/2018 1:32 PM, Chris Wilson wrote:
> Quoting Michel Thierry (2018-02-28 22:07:51)
>> On 28/02/18 12:26, Michel Thierry wrote:
>>> On 28/02/18 10:42, Piotr PiĆ³rkowski wrote:
>>>> In the i915 driver, there is a function, intel_guc_init_params(),
>>>> which initializes the GuC parameter block which is passed into
>>>> the GuC. There is parameter GUC_CTL_DEVICE_INFO with values
>>>> GfxGtType and GfxCoreFamily unused by GuC.
>>>> This patch remove GUC_CTL_DEVICE_INFO with GfxGtType and
>>>> GfxCoreFamily parameters and also unnecessary functions
>>>> get_gt_type() and get_core_family().
>>> Hi,
>>> Looking at the fw code, you're partially right, GfxGtType is ignored...
>>> but GfxCoreFamily isn't.
>> Unless whoever wrote the fw was smart enough to forget to call the
>> function that is reading GfxCoreFamily... I didn't count on that.
> Is the intention to use GfxCoreFamily documented, i.e. are they
> expecting it part of the interface and may re-instantiate the check
> "because it was always supposed to exist" in some future version?
Usage of GfxCoreFamily is only in SLPC and for platform specific 
initialization and might be removed in future interfaces.
If needed, we can add as part of SLPC patches.
> -Chris
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