[PATCH v9 6/8] drm/i915/uapi/pxp: Add a GET_PARAM for PXP

[Teres Alexis, Alan Previn]

On Thu, 2023-04-27 at 16:48 -0700, Teres Alexis, Alan Previn wrote:
> Because of the additional firmware, component-driver and
> initialization depedencies required on MTL platform before a
> PXP context can be created, UMD calling for PXP creation as a
> way to get-caps can take a long time. An actual real world
> customer stack has seen this happen in the 4-to-8 second range
> after the kernel starts (which sees MESA's init appear in the
> middle of this range as the compositor comes up). To avoid
> unncessary delays experienced by the UMD for get-caps purposes,
> add a GET_PARAM for I915_PARAM_PXP_SUPPORT.
> 
alan:snip.
Progress update on the UMD side - I'm working on patch for PR here: 
https://gitlab.freedesktop.org/alan_previn_intel/mesa-alan-previn-features/-/commit/fb9d4fbfbef7dfd3f41df335cd31549fd39ddb57
but taking time to verify certain code paths