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This is yet another chapter in the ongoing saga of bringing RC6 to Sandy Bridge machines by default. Now that we have discovered that RC6 issues are triggered by RC6+ state, let's try to disable it by default. Plain RC6 is the one responsible for most energy savings, and so far it haven't given any problems - at least, none we are aware of. So with this, when i915_enable_rc6=-1 (e.g., the default value), we'll attempt to enable plain RC6 only on SNB. For Ivy Bridge, the behavior stays the same as always - we enable both RC6 and deep RC6. Note that while this exact patch does not has explicit tested-by's, the equivalent settings were fixed in 3.3 kernel by a smaller patch. And it has also received considerable testing through Canonical RC6 task-force testing at https://wiki.ubuntu.com/Kernel/PowerManagementRC6. Up to date, it looks like all the known issues are gone. v2: improve description and reference a couple of open bugs related to RC6 which seem to be fixed with this change. References: https://bugs.freedesktop.org/show_bug.cgi?id=41682 References: https://bugs.freedesktop.org/show_bug.cgi?id=38567 References: https://bugs.freedesktop.org/show_bug.cgi?id=44867 Acked-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> |
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| .. | ||
| dvo_ch7xxx.c | ||
| dvo_ch7017.c | ||
| dvo_ivch.c | ||
| dvo_sil164.c | ||
| dvo_tfp410.c | ||
| dvo.h | ||
| i915_debugfs.c | ||
| i915_dma.c | ||
| i915_drv.c | ||
| i915_drv.h | ||
| i915_gem_debug.c | ||
| i915_gem_evict.c | ||
| i915_gem_execbuffer.c | ||
| i915_gem_gtt.c | ||
| i915_gem_tiling.c | ||
| i915_gem.c | ||
| i915_ioc32.c | ||
| i915_irq.c | ||
| i915_reg.h | ||
| i915_suspend.c | ||
| i915_trace_points.c | ||
| i915_trace.h | ||
| intel_acpi.c | ||
| intel_bios.c | ||
| intel_bios.h | ||
| intel_crt.c | ||
| intel_display.c | ||
| intel_dp.c | ||
| intel_drv.h | ||
| intel_dvo.c | ||
| intel_fb.c | ||
| intel_hdmi.c | ||
| intel_i2c.c | ||
| intel_lvds.c | ||
| intel_modes.c | ||
| intel_opregion.c | ||
| intel_overlay.c | ||
| intel_panel.c | ||
| intel_ringbuffer.c | ||
| intel_ringbuffer.h | ||
| intel_sdvo_regs.h | ||
| intel_sdvo.c | ||
| intel_sprite.c | ||
| intel_tv.c | ||
| Makefile | ||