[Intel-gfx] [RFC 00/22] Add support for GuC-based SLPC

tom.orourke at intel.com tom.orourke at intel.com
Wed Jan 20 18:26:02 PST 2016

From: Tom O'Rourke <Tom.O'Rourke at intel.com>

SLPC (Single Loop Power Controller) is a replacement for
some host-based power management features.  The SLPC
implemenation runs in firmware on GuC.

This series is a first request for comments.  This series
is not expected to be merged.  After changes based on
comments, a later patch series will be sent for merging.
This series has been tested with SKL guc firmware
versions 4.3 and 4.7.  The graphics power management
features in SLPC in those versions are DFPS (Dynamic FPS),
Turbo, and DCC (Duty Cycle Control).  DFPS adjusts
requested graphics frequency to maintain target framerate.
Turbo adjusts requested graphics frequency to maintain
target GT busyness.  DCC adjusts requested graphics
frequency and stalls guc-scheduler to maintain actual
graphics frequency in efficient range.

Patch 1/22 is included ihere for convenience and should be
part of an earlier series.  SLPC assumes guc firmware has
been loaded and GuC submission is enabled.

Patch 22/22 sets the flag to enable SLPC on SKL.  Without
this patch, the previous patches should have no effect.

VIZ-6773, VIZ-6889

Dave Gordon (1):
  drm/i915: Enable GuC submission, where supported

Sagar Arun Kamble (4):
  drm/i915/slpc: Enable/Disable RC6 in SLPC flows
  drm/i915/slpc: Add Display mode event related data structures
  drm/i915/slpc: Notification of Display mode change
  drm/i915/slpc: Notification of Refresh Rate change

Tom O'Rourke (17):
  drm/i915/slpc: Add has_slpc capability flag
  drm/i915/slpc: Expose guc functions for use with SLPC
  drm/i915/slpc: Use intel_slpc_* functions if supported
  drm/i915/slpc: If using SLPC, do not set frequency
  drm/i915/slpc: Enable SLPC in guc if supported
  drm/i915/slpc: Allocate/Release/Initialize SLPC shared data
  drm/i915/slpc: Setup rps frequency values during SLPC init
  drm/i915/slpc: Update current requested frequency
  drm/i915/slpc: Send reset event
  drm/i915/slpc: Send shutdown event
  drm/i915/slpc: Add slpc_status enum values
  drm/i915/slpc: Add i915_slpc_info to debugfs
  drm/i915/slpc: Add dfps task info to i915_slpc_info
  drm/i915/slpc: Add parameter unset/set/get functions
  drm/i915/slpc: Add slpc support for max/min freq
  drm/i915/slpc: Add enable/disable debugfs for slpc
  drm/i915/slpc: Add has_slpc to skylake info

 drivers/gpu/drm/i915/Makefile              |   5 +-
 drivers/gpu/drm/i915/i915_debugfs.c        | 436 +++++++++++++++++++++++++
 drivers/gpu/drm/i915/i915_drv.c            |   1 +
 drivers/gpu/drm/i915/i915_drv.h            |   2 +
 drivers/gpu/drm/i915/i915_guc_submission.c |   6 +-
 drivers/gpu/drm/i915/i915_params.c         |   4 +-
 drivers/gpu/drm/i915/i915_sysfs.c          |  10 +
 drivers/gpu/drm/i915/intel_display.c       |   2 +
 drivers/gpu/drm/i915/intel_dp.c            |   2 +
 drivers/gpu/drm/i915/intel_drv.h           |   1 +
 drivers/gpu/drm/i915/intel_guc.h           |   7 +
 drivers/gpu/drm/i915/intel_guc_loader.c    |   3 +
 drivers/gpu/drm/i915/intel_pm.c            |  43 ++-
 drivers/gpu/drm/i915/intel_slpc.c          | 499 +++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_slpc.h          | 207 ++++++++++++
 15 files changed, 1210 insertions(+), 18 deletions(-)
 create mode 100644 drivers/gpu/drm/i915/intel_slpc.c
 create mode 100644 drivers/gpu/drm/i915/intel_slpc.h


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