/* * linux/sound/wm8996.h -- Platform data for WM8996 * * Copyright 2011 Wolfson Microelectronics. PLC. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #ifndef __LINUX_SND_WM8996_H #define __LINUX_SND_WM8996_H enum wm8996_inmode { WM8996_DIFFERRENTIAL_1 = 0, /* IN1xP - IN1xN */ WM8996_INVERTING = 1, /* IN1xN */ WM8996_NON_INVERTING = 2, /* IN1xP */ WM8996_DIFFERENTIAL_2 = 3, /* IN2xP - IN2xP */ }; /** * ReTune Mobile configurations are specified with a label, sample * rate and set of values to write (the enable bits will be ignored). * * Configurations are expected to be generated using the ReTune Mobile * control panel in WISCE - see http://www.wolfsonmicro.com/wisce/ */ struct wm8996_retune_mobile_config { const char *name; int rate; u16 regs[20]; }; #define WM8996_SET_DEFAULT 0x10000 struct wm8996_pdata { int irq_flags; /** Set IRQ trigger flags; default active low */ int ldo_ena; /** GPIO for LDO1; -1 for none */ int micdet_def; /** Default MICDET_SRC/HP1FB_SRC/MICD_BIAS */ enum wm8996_inmode inl_mode; enum wm8996_inmode inr_mode; u32 spkmute_seq; /** Value for register 0x802 */ int gpio_base; u32 gpio_default[5]; int num_retune_mobile_cfgs; struct wm8996_retune_mobile_config *retune_mobile_cfgs; }; #endif tr> net-next plumbingsTobias Klauser
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authorSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>2017-02-03 14:18:39 -0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-02-04 00:11:08 +0100
commit6e978b22efa1db9f6e71b24440b5f1d93e968ee3 (patch)
treec666f7a26b860674848949e39a610222b0723f89 /tools/perf/tests/fdarray.c
parent3c223c19aea85d3dda1416c187915f4a30b04b1f (diff)
cpufreq: intel_pstate: Disable energy efficiency optimization
Some Kabylake desktop processors may not reach max turbo when running in HWP mode, even if running under sustained 100% utilization. This occurs when the HWP.EPP (Energy Performance Preference) is set to "balance_power" (0x80) -- the default on most systems. It occurs because the platform BIOS may erroneously enable an energy-efficiency setting -- MSR_IA32_POWER_CTL BIT-EE, which is not recommended to be enabled on this SKU. On the failing systems, this BIOS issue was not discovered when the desktop motherboard was tested with Windows, because the BIOS also neglects to provide the ACPI/CPPC table, that Windows requires to enable HWP, and so Windows runs in legacy P-state mode, where this setting has no effect. Linux' intel_pstate driver does not require ACPI/CPPC to enable HWP, and so it runs in HWP mode, exposing this incorrect BIOS configuration. There are several ways to address this problem. First, Linux can also run in legacy P-state mode on this system. As intel_pstate is how Linux enables HWP, booting with "intel_pstate=disable" will run in acpi-cpufreq/ondemand legacy p-state mode. Or second, the "performance" governor can be used with intel_pstate, which will modify HWP.EPP to 0. Or third, starting in 4.10, the /sys/devices/system/cpu/cpufreq/policy*/energy_performance_preference attribute in can be updated from "balance_power" to "performance". Or fourth, apply this patch, which fixes the erroneous setting of MSR_IA32_POWER_CTL BIT_EE on this model, allowing the default configuration to function as designed. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Reviewed-by: Len Brown <len.brown@intel.com> Cc: 4.6+ <stable@vger.kernel.org> # 4.6+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'tools/perf/tests/fdarray.c')