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linux/drivers/gpu/drm/i915
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Chris Wilson 60548c554b drm/i915: Interactive RPS mode 
RPS provides a feedback loop where we use the load during the previous
evaluation interval to decide whether to up or down clock the GPU
frequency. Our responsiveness is split into 3 regimes, a high and low
plateau with the intent to keep the gpu clocked high to cover occasional
stalls under high load, and low despite occasional glitches under steady
low load, and inbetween. However, we run into situations like kodi where
we want to stay at low power (video decoding is done efficiently
inside the fixed function HW and doesn't need high clocks even for high
bitrate streams), but just occasionally the pipeline is more complex
than a video decode and we need a smidgen of extra GPU power to present
on time. In the high power regime, we sample at sub frame intervals with
a bias to upclocking, and conversely at low power we sample over a few
frames worth to provide what we consider to be the right levels of
responsiveness respectively. At low power, we more or less expect to be
kicked out to high power at the start of a busy sequence by waitboosting.

Prior to commit e9af4ea2b9 ("drm/i915: Avoid waitboosting on the active
request") whenever we missed the frame or stalled, we would immediate go
full throttle and upclock the GPU to max. But in commit e9af4ea2b9, we
relaxed the waitboosting to only apply if the pipeline was deep to avoid
over-committing resources for a near miss. Sadly though, a near miss is
still a miss, and perceptible as jitter in the frame delivery.

To try and prevent the near miss before having to resort to boosting
after the fact, we use the pageflip queue as an indication that we are
in an "interactive" regime and so should sample the load more frequently
to provide power before the frame misses it vblank. This will make us
more favorable to providing a small power increase (one or two bins) as
required rather than going all the way to maximum and then having to
work back down again. (We still keep the waitboosting mechanism around
just in case a dramatic change in system load requires urgent uplocking,
faster than we can provide in a few evaluation intervals.)

v2: Reduce rps_set_interactive to a boolean parameter to avoid the
confusion of what if they wanted a new power mode after pinning to a
different mode (which to choose?)
v3: Only reprogram RPS while the GT is awake, it will be set when we
wake the GT, and while off warns about being used outside of rpm.
v4: Fix deferred application of interactive mode
v5: s/state/interactive/
v6: Group the mutex with its principle in a substruct

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107111
Fixes: e9af4ea2b9 ("drm/i915: Avoid waitboosting on the active request")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Radoslaw Szwichtenberg <radoslaw.szwichtenberg@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180731132629.3381-1-chris@chris-wilson.co.uk
2018-07-31 15:50:30 +01:00
..
gvt drm/i915/kvmgt: Fix compilation error 2018-07-23 15:52:02 -07:00
selftests drm/i915/selftests: Replace opencoded clflush with drm_clflush_virt_range 2018-07-30 10:33:21 +01:00
dvo.h
dvo_ch7xxx.c drm/i915/dvo: switch to kernel unsigned int types 2018-06-18 14:45:58 +03:00
dvo_ch7017.c drm/i915/dvo: switch to kernel unsigned int types 2018-06-18 14:45:58 +03:00
dvo_ivch.c drm/i915/dvo: switch to kernel unsigned int types 2018-06-18 14:45:58 +03:00
dvo_ns2501.c drm/i915/dvo: switch to kernel unsigned int types 2018-06-18 14:45:58 +03:00
dvo_sil164.c drm/i915/dvo: switch to kernel unsigned int types 2018-06-18 14:45:58 +03:00
dvo_tfp410.c drm/i915/dvo: switch to kernel unsigned int types 2018-06-18 14:45:58 +03:00
i915_cmd_parser.c
i915_debugfs.c drm/i915: Interactive RPS mode 2018-07-31 15:50:30 +01:00
i915_drv.c Merge drm/drm-next into drm-intel-next-queued 2018-07-23 09:13:12 -07:00
i915_drv.h drm/i915: Interactive RPS mode 2018-07-31 15:50:30 +01:00
i915_gem.c drm/i915: Don't disable the GPU for older gen on wedging 2018-07-26 12:53:34 +01:00
i915_gem.h drm/i915/execlists: Direct submission of new requests (avoid tasklet/ksoftirqd) 2018-06-28 22:55:10 +01:00
i915_gem_batch_pool.c
i915_gem_batch_pool.h
i915_gem_clflush.c
i915_gem_clflush.h
i915_gem_context.c drm/i915: Remove unnecessary ggtt_offset_bias from i915_gem_context 2018-07-27 16:07:37 +01:00
i915_gem_context.h drm/i915: Remove unnecessary ggtt_offset_bias from i915_gem_context 2018-07-27 16:07:37 +01:00
i915_gem_dmabuf.c dma-buf: remove kmap_atomic interface 2018-06-20 15:59:34 +02:00
i915_gem_evict.c drm/i915: Provide a timeout to i915_gem_wait_for_idle() 2018-07-09 13:55:41 +01:00
i915_gem_execbuffer.c drm/i915: Move i915_vma_move_to_active() to i915_vma.c 2018-07-06 18:22:41 +01:00
i915_gem_fence_reg.c
i915_gem_fence_reg.h
i915_gem_gtt.c drm/i915/gtt: remove px_page 2018-07-30 15:21:48 +01:00
i915_gem_gtt.h drm/i915/gtt: remove px_page 2018-07-30 15:21:48 +01:00
i915_gem_internal.c
i915_gem_object.c
i915_gem_object.h drm/i915: Mark up object tiling-and-stride getters as const 2018-07-26 12:31:02 +01:00
i915_gem_render_state.c drm/i915: Start returning an error from i915_vma_move_to_active() 2018-07-06 18:22:37 +01:00
i915_gem_render_state.h
i915_gem_shrinker.c drm/i915: Introduce i915_address_space.mutex 2018-07-11 13:56:16 +01:00
i915_gem_stolen.c drm/i915: use the ICL stolen memory 2018-07-10 16:29:56 -07:00
i915_gem_tiling.c
i915_gem_userptr.c drm/i915/userptr: Enable read-only support on gen8+ 2018-07-13 16:18:15 +01:00
i915_gemfs.c
i915_gemfs.h
i915_gpu_error.c drm/i915: Track vma activity per fence.context, not per engine 2018-07-06 18:22:43 +01:00
i915_gpu_error.h drm/i915: Track vma activity per fence.context, not per engine 2018-07-06 18:22:43 +01:00
i915_ioc32.c
i915_irq.c drm/i915: Interactive RPS mode 2018-07-31 15:50:30 +01:00
i915_memcpy.c
i915_mm.c
i915_oa_bdw.c
i915_oa_bdw.h
i915_oa_bxt.c
i915_oa_bxt.h
i915_oa_cflgt2.c
i915_oa_cflgt2.h
i915_oa_cflgt3.c
i915_oa_cflgt3.h
i915_oa_chv.c
i915_oa_chv.h
i915_oa_cnl.c
i915_oa_cnl.h
i915_oa_glk.c
i915_oa_glk.h
i915_oa_hsw.c
i915_oa_hsw.h
i915_oa_icl.c
i915_oa_icl.h
i915_oa_kblgt2.c
i915_oa_kblgt2.h
i915_oa_kblgt3.c
i915_oa_kblgt3.h
i915_oa_sklgt2.c
i915_oa_sklgt2.h
i915_oa_sklgt3.c
i915_oa_sklgt3.h
i915_oa_sklgt4.c
i915_oa_sklgt4.h
i915_params.c drm/i915: Remove intel_panel_detect() 2018-07-19 18:39:31 +03:00
i915_params.h drm/i915: Remove intel_panel_detect() 2018-07-19 18:39:31 +03:00
i915_pci.c drm/i915: Only force GGTT coherency w/a on required chipsets 2018-07-20 16:53:55 +01:00
i915_perf.c drm/i915: Pull unpin map into vma release 2018-07-24 09:55:12 +01:00
i915_pmu.c drm/i915/pmu: Do not assume fixed hrtimer period 2018-06-05 16:45:01 +01:00
i915_pmu.h drm/i915/pmu: Do not assume fixed hrtimer period 2018-06-05 16:45:01 +01:00
i915_pvinfo.h - Ice Lake's display enabling patches (Jose, Mahesh, Dhinakaran, Paulo, Manasi, Anusha, Arkadiusz) 2018-06-07 10:24:50 +08:00
i915_query.c drm/i915/query: nospec expects no more than an unsigned long 2018-05-29 13:53:07 +03:00
i915_query.h
i915_reg.h drm/i915/icl: Set TBT IO in Aux transaction 2018-07-27 16:19:39 -07:00
i915_request.c drm/i915: Provide a timeout to i915_gem_wait_for_idle() 2018-07-09 13:55:41 +01:00
i915_request.h drm/i915: Track vma activity per fence.context, not per engine 2018-07-06 18:22:43 +01:00
i915_scheduler.h
i915_selftest.h drm/i915/selftests: Downgrade igt_timeout message 2018-07-16 11:23:45 +01:00
i915_suspend.c
i915_sw_fence.c
i915_sw_fence.h
i915_syncmap.c
i915_syncmap.h
i915_sysfs.c
i915_timeline.c drm/i915: Split i915_gem_timeline into individual timelines 2018-05-02 23:57:18 +01:00
i915_timeline.h drm/i915: Replace nested subclassing with explicit subclasses 2018-07-07 08:09:43 +01:00
i915_trace.h drm/i915/ringbuffer: Fix context restore upon reset 2018-06-11 14:03:47 +01:00
i915_trace_points.c
i915_utils.h drm/i915: Retire requests along rings 2018-04-30 16:01:18 +01:00
i915_vgpu.c drm/i915/gtt: Rename i915_hw_ppgtt base member 2018-06-05 21:11:20 +01:00
i915_vgpu.h drm/i915: Add new vGPU cap info bit VGT_CAPS_HUGE_GTT 2018-06-05 16:57:01 +03:00
i915_vma.c drm/i915: Pull unpin map into vma release 2018-07-24 09:55:12 +01:00
i915_vma.h drm/i915/guc: Move the pin bias value from GuC to GGTT 2018-07-27 16:03:41 +01:00
icl_dsi.c drm/i915/icl: Power down unused DSI lanes 2018-07-06 12:14:16 +03:00
intel_acpi.c drm/i915/dsm: remove unnecessary dsm priv structure 2018-06-14 15:59:09 +03:00
intel_atomic.c Chris is doing many reworks that allow us to get full-ppgtt supported 2018-06-28 13:10:44 +10:00
intel_atomic_plane.c Chris is doing many reworks that allow us to get full-ppgtt supported 2018-06-28 13:10:44 +10:00
intel_audio.c drm/i915/audio: constify ELD pointers 2018-06-19 17:41:44 +03:00
intel_bios.c drm/i915/psr: fix copy-paste error with setting of tp2_wakeup_time_us 2018-06-20 12:00:31 -07:00
intel_bios.h
intel_breadcrumbs.c drm/i915: Move the irq_counter inside the spinlock 2018-06-28 20:56:35 +01:00
intel_cdclk.c drm/i915: Mark expected switch fall-throughs 2018-07-05 16:40:51 +03:00
intel_color.c
intel_crt.c drm/i915: Enforce max hdisplay/hblank_start limits on HSW/BDW FDI 2018-06-19 17:18:24 +03:00
intel_csr.c drm/i915: add support for specifying DMC firmware override by module param 2018-05-02 13:05:01 +03:00
intel_ddi.c drm/i915/icl: toggle PHY clock gating around link training 2018-07-25 13:45:26 -07:00
intel_device_info.c drm/i915: Record logical context support in driver caps 2018-07-06 14:05:23 +01:00
intel_device_info.h drm/i915: Only force GGTT coherency w/a on required chipsets 2018-07-20 16:53:55 +01:00
intel_display.c drm/i915: Interactive RPS mode 2018-07-31 15:50:30 +01:00
intel_display.h drm/i915/icl: store the port type for TC ports 2018-07-25 13:33:25 -07:00
intel_dp.c drm/i915/icl: Set TBT IO in Aux transaction 2018-07-27 16:19:39 -07:00
intel_dp_aux_backlight.c drm/i915/backlight: switch to kernel unsigned int types 2018-06-18 14:46:04 +03:00
intel_dp_link_training.c drm/i915/dp: Improve clock recovery loop limit comment 2018-07-25 09:57:25 -07:00
intel_dp_mst.c drm/i915/mst: Continue state updates even if AUX writes fail. 2018-07-26 00:32:44 -07:00
intel_dpio_phy.c
intel_dpll_mgr.c drm/i915/icl: Add TBT checks for PLL calculations 2018-07-27 16:18:31 -07:00
intel_dpll_mgr.h drm/i915/icl: Fix MG PLL setup when refclk is 38.4MHz 2018-06-21 19:01:40 +03:00
intel_drv.h drm/i915: Interactive RPS mode 2018-07-31 15:50:30 +01:00
intel_dsi.h drm/i915/dsi: use vlv and bxt prefixes for the global DSI functions 2018-07-06 10:54:05 +03:00
intel_dsi_dcs_backlight.c
intel_dsi_vbt.c drm/i915/dsi: use vlv and bxt prefixes for the global DSI functions 2018-07-06 10:54:05 +03:00
intel_dvo.c drm/i915: Allow DBLSCAN user modes with eDP/LVDS/DSI 2018-06-19 15:47:49 +03:00
intel_engine_cs.c drm/i915: Eliminate use of PAGE_SIZE as a virtual alignment 2018-07-27 11:05:28 +01:00
intel_fbc.c drm/i915: Remove delayed FBC activation. 2018-06-29 10:06:31 +02:00
intel_fbdev.c drm/i915: Use intel_fb_obj() everywhere 2018-05-22 09:44:02 +01:00
intel_fifo_underrun.c
intel_frontbuffer.c drm/i915/psr: Nuke PSR support for VLV and CHV 2018-05-24 16:05:19 +03:00
intel_frontbuffer.h
intel_gpu_commands.h
intel_guc.c drm/i915/guc: Move the pin bias value from GuC to GGTT 2018-07-27 16:03:41 +01:00
intel_guc.h drm/i915/guc: Move the pin bias value from GuC to GGTT 2018-07-27 16:03:41 +01:00
intel_guc_ads.c drm/i915: Pull unpin map into vma release 2018-07-24 09:55:12 +01:00
intel_guc_ads.h
intel_guc_ct.c drm/i915: Pull unpin map into vma release 2018-07-24 09:55:12 +01:00
intel_guc_ct.h
intel_guc_fw.c
intel_guc_fw.h
intel_guc_fwif.h drm/i915/guc: Move defines with size of GuC logs to intel_guc_log.h 2018-06-12 15:44:45 +01:00
intel_guc_log.c drm/i915: Pull unpin map into vma release 2018-07-24 09:55:12 +01:00
intel_guc_log.h drm/i915/guc: Add support for define guc_log_size in megabytes. 2018-06-12 15:44:47 +01:00
intel_guc_reg.h
intel_guc_submission.c drm/i915: Pull unpin map into vma release 2018-07-24 09:55:12 +01:00
intel_guc_submission.h
intel_gvt.c drm/i915: Unwind HW init after GVT setup failure 2018-07-10 16:46:09 +01:00
intel_gvt.h
intel_hangcheck.c drm/i915: Declare the driver wedged if hangcheck makes no progress 2018-06-14 19:20:33 +01:00
intel_hdcp.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
intel_hdmi.c Chris is doing many reworks that allow us to get full-ppgtt supported 2018-06-28 13:10:44 +10:00
intel_hotplug.c drm/i915: Pass hpd_pin to long_pulse_detect() 2018-07-13 18:22:22 +03:00
intel_huc.c drm/i915/guc: Move the pin bias value from GuC to GGTT 2018-07-27 16:03:41 +01:00
intel_huc.h drm/i915/uc: Fetch GuC/HuC firmwares from guc/huc specific init 2018-06-28 22:51:33 +01:00
intel_huc_fw.c
intel_huc_fw.h
intel_i2c.c drm/i915/gmbus: Enable burst read 2018-07-12 17:31:28 +02:00
intel_lpe_audio.c
intel_lrc.c drm/i915: Drop unneed i915 parameter from intel_ring_pin() 2018-07-27 18:22:08 +01:00
intel_lrc.h drm/i915: Remove superfluous GEN8_LR_CONTEXT_ALIGN 2018-07-27 11:30:42 +01:00
intel_lrc_reg.h
intel_lspcon.c drm/i915/lspcon: switch to kernel unsigned int types 2018-06-18 14:46:22 +03:00
intel_lvds.c On GEM side: 2018-07-20 12:29:24 +10:00
intel_mocs.c drm/i915/icl: Add configuring MOCS in new Icelake engines 2018-05-03 16:41:04 -07:00
intel_mocs.h
intel_modes.c drm: drop _mode_ from update_edit_property() 2018-07-13 18:40:27 +02:00
intel_opregion.c drm/i915/opregion: move acpi notifier to dev_priv 2018-06-14 13:48:10 +03:00
intel_opregion.h drm/i915/opregion: move acpi notifier to dev_priv 2018-06-14 13:48:10 +03:00
intel_overlay.c
intel_panel.c drm/i915: Remove intel_panel_detect() 2018-07-19 18:39:31 +03:00
intel_pipe_crc.c drm/i915: Remove support for legacy debugfs crc interface 2018-07-06 14:33:35 +02:00
intel_pm.c drm/i915: Interactive RPS mode 2018-07-31 15:50:30 +01:00
intel_psr.c drm/i915/psr: Remove few mod parameters option. 2018-07-12 23:33:38 -07:00
intel_renderstate.h
intel_renderstate_gen6.c
intel_renderstate_gen7.c
intel_renderstate_gen8.c
intel_renderstate_gen9.c
intel_ringbuffer.c drm/i915: Kick waiters on resetting legacy rings 2018-07-30 10:32:07 +01:00
intel_ringbuffer.h drm/i915: Drop unneed i915 parameter from intel_ring_pin() 2018-07-27 18:22:08 +01:00
intel_runtime_pm.c drm/i915/icl: don't set CNL_DDI_CLOCK_REG_ACCESS_ON anymore 2018-07-27 15:52:33 -07:00
intel_sdvo.c drm-misc-next for 4.19: 2018-07-20 10:46:49 +10:00
intel_sdvo_regs.h
intel_sideband.c
intel_sprite.c On GEM side: 2018-07-20 12:29:24 +10:00
intel_tv.c drm/i915/tv: fix strncpy truncation warning 2018-07-12 10:18:19 +01:00
intel_uc.c drm/i915/uc: Fetch GuC/HuC firmwares from guc/huc specific init 2018-06-28 22:51:33 +01:00
intel_uc.h
intel_uc_fw.c drm/i915/guc: Move the pin bias value from GuC to GGTT 2018-07-27 16:03:41 +01:00
intel_uc_fw.h drm/i915/firmware: Correct URL for firmware 2018-05-02 13:40:17 -07:00
intel_uncore.c drm/i915: Show stack (by WARN) for hitting forcewake errors 2018-07-24 11:55:20 +01:00
intel_uncore.h drm/i915/uncore: switch to kernel unsigned int types 2018-06-18 14:45:51 +03:00
intel_vbt_defs.h drm/i915/vbt: switch to kernel unsigned int types 2018-06-18 14:44:52 +03:00
intel_wopcm.c drm/i915: Add a fault injection point to WOPCM init 2018-07-27 16:07:45 +01:00
intel_wopcm.h
intel_workarounds.c drm/i915: Keep the ctx workarounds tightly packed 2018-06-15 13:27:04 +01:00
intel_workarounds.h
Kconfig
Kconfig.debug Higlights here goes to many PSR fixes and improvements; to the Ice lake work with 2018-07-19 05:46:30 +10:00
Makefile drm/i915/icl: Program DSI Escape clock Divider 2018-07-06 12:13:34 +03:00
vlv_dsi.c drm/i915/dsi: update some of the platform based checks 2018-07-06 10:54:10 +03:00
vlv_dsi_pll.c drm/i915/dsi: use vlv and bxt prefixes for the global DSI functions 2018-07-06 10:54:05 +03:00