[v9,0/5] Add driver for GSC controller

Message

Alexander Usyskin Feb. 17, 2022, 3:22 p.m. UTC

GSC is a graphics system controller, it provides
a chassis controller for graphics discrete cards.

There are two MEI interfaces in GSC: HECI1 and HECI2.

This series includes instantiation of the auxiliary devices for HECI2
and mei-gsc auxiliary device driver that binds to the auxiliary device.

The prinicpal user of this interface is the
Intel Graphics System Controller Firmware Update Library (IGSC FU)
(https://github.com/intel/igsc)

In v2 the platform device was replaced by the auxiliary device.
v3 is the rebase over drm-tip to make public CI running.
In v4 the not needed debug prints and empty line were removed,
      'select' were replaced by 'depends on' in MEI Kconfig,
      the new include file now listed in the MAINTATINERS file. 
V5, rebase and add Greg KH Reviewed-by
V6, rebase and drop redundant assignments found by the kernel test robot.
V7, add Greg KH Reviewed-by to the individual patches
V8, address Tvrtko comments for i915
V9, rebase and address more Tvrtko comments, use drm error printing

Alexander Usyskin (2):
  mei: gsc: setup char driver alive in spite of firmware handshake
    failure
  mei: gsc: retrieve the firmware version

Tomas Winkler (3):
  drm/i915/gsc: add gsc as a mei auxiliary device
  mei: add support for graphics system controller (gsc) devices
  mei: gsc: add runtime pm handlers

 MAINTAINERS                              |   1 +
 drivers/gpu/drm/i915/Kconfig             |   1 +
 drivers/gpu/drm/i915/Makefile            |   3 +
 drivers/gpu/drm/i915/gt/intel_gsc.c      | 204 ++++++++++++++++++
 drivers/gpu/drm/i915/gt/intel_gsc.h      |  37 ++++
 drivers/gpu/drm/i915/gt/intel_gt.c       |   3 +
 drivers/gpu/drm/i915/gt/intel_gt.h       |   5 +
 drivers/gpu/drm/i915/gt/intel_gt_irq.c   |  13 ++
 drivers/gpu/drm/i915/gt/intel_gt_regs.h  |   1 +
 drivers/gpu/drm/i915/gt/intel_gt_types.h |   2 +
 drivers/gpu/drm/i915/i915_drv.h          |   8 +
 drivers/gpu/drm/i915/i915_pci.c          |   3 +-
 drivers/gpu/drm/i915/i915_reg.h          |   2 +
 drivers/gpu/drm/i915/intel_device_info.h |   2 +
 drivers/misc/mei/Kconfig                 |  14 ++
 drivers/misc/mei/Makefile                |   3 +
 drivers/misc/mei/bus-fixup.c             |  25 +++
 drivers/misc/mei/gsc-me.c                | 252 +++++++++++++++++++++++
 drivers/misc/mei/hw-me.c                 |  29 ++-
 drivers/misc/mei/hw-me.h                 |   2 +
 include/linux/mei_aux.h                  |  19 ++
 21 files changed, 626 insertions(+), 3 deletions(-)
 create mode 100644 drivers/gpu/drm/i915/gt/intel_gsc.c
 create mode 100644 drivers/gpu/drm/i915/gt/intel_gsc.h
 create mode 100644 drivers/misc/mei/gsc-me.c
 create mode 100644 include/linux/mei_aux.h