[Intel-gfx] [PATCH 0/4] drm/i915: Prepare for GSC-loaded HuC

[Daniele Ceraolo Spurio]

On newer platforms (starting DG2 G10 B-step and G11 A-step), ownership of
HuC loading and authentication has been moved from the GuC to the GSC, with
both actions being performed via a single PXP command.
Given that the mei code has not fully landed yet (see [1]), we can't
implement the new load mechanism, but we can start getting ready for it
by taking care of the changes required for the existing code:

- The HuC header is now different from the GuC one. This also means that
  if the FW is for GSC-loading and the HW fuse is set to legacy load (or
  vice-versa) we can't load the HuC.

- To send a PXP message to the GSC we need both MEI_GSC and MEI_PXP.

- All legacy HuC loading paths can be skipped.

Note that the HuC fw version for DG2 is still not defined, so the HuC
code will be skipped until the define is added.

[1] https://patchwork.freedesktop.org/series/102339/

Cc: Alan Previn <alan.previn.teres.alexis at intel.com>
Cc: John Harrison <john.c.harrison at intel.com>

Daniele Ceraolo Spurio (4):
  drm/i915/huc: check HW directly for HuC auth status
  drm/i915/huc: Add fetch support for gsc-loaded HuC binary
  drm/i915/huc: Prepare for GSC-loaded HuC
  drm/i915/huc: Don't fail the probe if HuC init fails

 drivers/gpu/drm/i915/gt/uc/intel_guc_reg.h   |  1 +
 drivers/gpu/drm/i915/gt/uc/intel_huc.c       | 97 +++++++++++++++----
 drivers/gpu/drm/i915/gt/uc/intel_huc.h       |  5 +-
 drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c    |  5 +-
 drivers/gpu/drm/i915/gt/uc/intel_uc.c        | 22 +++--
 drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c     | 99 ++++++++++++--------
 drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h     |  2 +
 drivers/gpu/drm/i915/gt/uc/intel_uc_fw_abi.h |  9 ++
 8 files changed, 172 insertions(+), 68 deletions(-)

-- 
2.25.1