[Intel-gfx] [PATCH v2 5/8] drm/i915/huc: differentiate the 2 steps of the MTL HuC auth flow

[Teres Alexis, Alan Previn]

On Fri, 2023-04-28 at 11:58 -0700, Ceraolo Spurio, Daniele wrote:
> Before we add the second step of the MTL HuC auth (via GSC), we need to
> have the ability to differentiate between them. To do so, the huc
> authentication check is duplicated for GuC and GSC auth, with meu
> binaries being considered fully authenticated only after the GSC auth
> step.
> 
> To report the difference between the 2 auth steps, a new case is added
> to the HuC getparam. This way, the clear media driver can start
> submitting before full auth, as partial auth is enough for those
> workloads.
> 
> v2: fix authentication status check for DG2
> 
> Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
> Cc: Alan Previn <alan.previn.teres.alexis at intel.com>
> ---
>  drivers/gpu/drm/i915/gt/uc/intel_huc.c    | 94 +++++++++++++++++------
>  drivers/gpu/drm/i915/gt/uc/intel_huc.h    | 16 +++-
>  drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c |  4 +-
>  drivers/gpu/drm/i915/i915_reg.h           |  3 +
>  include/uapi/drm/i915_drm.h               |  3 +-
>  5 files changed, 91 insertions(+), 29 deletions(-)
> 
I believe you need a rebase with the PXP single session merged (the
readiness code in gsccs backend). Other than that, all looks good:

Reviewed-by: Alan Previn <alan.previn.teres.alexis at intel.com>