From: Tom O'Rourke <Tom.O'Rourke@xxxxxxxxx> 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 has been tested with SKL guc firmware version 6.1 and BXT guc version 5.1. The graphics power management features in SLPC in those versions are called GTPERF, BALANCER, and DCC. GTPERF is a combination of DFPS (Dynamic FPS) and Turbo. DFPS adjusts requested graphics frequency to maintain target framerate. Turbo adjusts requested graphics frequency to maintain target GT busyness; this includes an adaptive boost turbo method. BALANCER adjusts balance between power budgets for IA and GT in power limited scenarios. BALANCER is only active when all display pipes are in "game" mode. DCC (Duty Cycle Control) adjusts requested graphics frequency and stalls guc-scheduler to maintain actual graphics frequency in efficient range. This series is a followup to the request for comments " [RFC 00/22] Add support for GuC-based SLPC" https://lists.freedesktop.org/archives/intel-gfx/2016-January/085830.html Thank you to Paulo for his valuable review of the RFC series. Thank you also to Ville, Daniel, Jesse, and Martin for their helpful comments. We (Tom and Sagar) have attempted to incorporate these suggestions in this series. We also adapted to a new SLPC interface version that reflects an internal reorganization within the firmware. The biggest change refactored the tasks. The DFPS and Turbo tasks were merged into the GTPERF task. The IBC (Intelligent Bias Control) feature that had been grouped with Turbo was split out into the BALANCER task. The requested frequency can be fixed by setting min and max to the same value. As before, the actual frequency is controlled by the punit. In addition to the debugfs files to enable/disable each task, there is a module parameter to completely disable SLPC. By default, SLPC will be disabled by module parameter. Benchmarks showing power/performance results are expected before enabling SLPC by default. We anticipate DFPS and BALANCER will not be effective on Linux systems due to difficulty determining frame rate with a compositor and display not in "game" mode. GTPERF (Turbo) and DCC should be effective. Patches 22/26 to 26/26 are included for convenience in testing this series and are not intended to be merged at this time. SLPC requires guc submission and should be disabled if guc submission is not enabled. VIZ-6773, VIZ-6889 Dave Gordon (1): DO NOT MERGE: drm/i915: Enable GuC submission, where supported Peter Antoine (1): DO NOT MERGE: drm/i915: resize the GuC WOPCM for rc6 Sagar Arun Kamble (3): 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 (21): drm/i915/slpc: Expose guc functions for use with SLPC drm/i915/slpc: Add has_slpc capability flag drm/i915/slpc: Add slpc_version_check drm/i915/slpc: Add enable_slpc module parameter drm/i915/slpc: Use intel_slpc_* functions if supported drm/i915/slpc: Enable SLPC in guc if supported drm/i915/slpc: If using SLPC, do not set frequency 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 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 broxton support drm/i915/slpc: Add i915_slpc_info to debugfs DO NOT MERGE: drm/i915: Change SKL guc version wanted to 6.0 DO NOT MERGE: drm/i915/bxt: Add Broxton to guc loader DO NOT MERGE: drm/i915: Enable SLPC, where supported drivers/gpu/drm/i915/Makefile | 5 +- drivers/gpu/drm/i915/i915_debugfs.c | 456 +++++++++++++++++++++++++++ drivers/gpu/drm/i915/i915_drv.c | 2 + drivers/gpu/drm/i915/i915_drv.h | 2 + drivers/gpu/drm/i915/i915_guc_reg.h | 3 +- drivers/gpu/drm/i915/i915_guc_submission.c | 6 +- drivers/gpu/drm/i915/i915_params.c | 10 +- drivers/gpu/drm/i915/i915_params.h | 1 + drivers/gpu/drm/i915/i915_sysfs.c | 20 ++ drivers/gpu/drm/i915/intel_display.c | 2 + drivers/gpu/drm/i915/intel_dp.c | 2 + drivers/gpu/drm/i915/intel_drv.h | 12 + drivers/gpu/drm/i915/intel_guc.h | 13 + drivers/gpu/drm/i915/intel_guc_loader.c | 53 +++- drivers/gpu/drm/i915/intel_pm.c | 41 ++- drivers/gpu/drm/i915/intel_slpc.c | 484 +++++++++++++++++++++++++++++ drivers/gpu/drm/i915/intel_slpc.h | 209 +++++++++++++ 17 files changed, 1299 insertions(+), 22 deletions(-) create mode 100644 drivers/gpu/drm/i915/intel_slpc.c create mode 100644 drivers/gpu/drm/i915/intel_slpc.h -- 1.9.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
