# ALSA PowerMac drivers menuconfig SND_PPC bool "PowerPC sound devices" depends on PPC default y help Support for sound devices specific to PowerPC architectures. if SND_PPC config SND_POWERMAC tristate "PowerMac (AWACS, DACA, Burgundy, Tumbler, Keywest)" depends on I2C && INPUT && PPC_PMAC select SND_PCM select SND_VMASTER help Say Y here to include support for the integrated sound device. To compile this driver as a module, choose M here: the module will be called snd-powermac. config SND_POWERMAC_AUTO_DRC bool "Toggle DRC automatically at headphone/line plug-in" depends on SND_POWERMAC default y help Say Y here to enable the automatic toggle of DRC (dynamic range compression) on Tumbler/Snapper. If this feature is enabled, DRC is turned off when the headphone/line jack is plugged, and turned on when unplugged. Note that you can turn on/off DRC manually even without this option. config SND_PS3 tristate "PS3 Audio support" depends on PS3_PS3AV select SND_PCM default m help Say Y here to include support for audio on the PS3 To compile this driver as a module, choose M here: the module will be called snd_ps3. config SND_PS3_DEFAULT_START_DELAY int "Startup delay time in ms" depends on SND_PS3 default "2000" endif # SND_PPC op-back'>packet-loop-back 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 /sound/soc/codecs/tlv320aic32x4-spi.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 'sound/soc/codecs/tlv320aic32x4-spi.c')