#ifndef __USBMIXER_H #define __USBMIXER_H #include struct usb_mixer_interface { struct snd_usb_audio *chip; struct usb_host_interface *hostif; struct list_head list; unsigned int ignore_ctl_error; struct urb *urb; /* array[MAX_ID_ELEMS], indexed by unit id */ struct usb_mixer_elem_list **id_elems; /* the usb audio specification version this interface complies to */ int protocol; /* Sound Blaster remote control stuff */ const struct rc_config *rc_cfg; u32 rc_code; wait_queue_head_t rc_waitq; struct urb *rc_urb; struct usb_ctrlrequest *rc_setup_packet; u8 rc_buffer[6]; }; #define MAX_CHANNELS 16 /* max logical channels */ enum { USB_MIXER_BOOLEAN, USB_MIXER_INV_BOOLEAN, USB_MIXER_S8, USB_MIXER_U8, USB_MIXER_S16, USB_MIXER_U16, USB_MIXER_S32, USB_MIXER_U32, }; typedef void (*usb_mixer_elem_dump_func_t)(struct snd_info_buffer *buffer, struct usb_mixer_elem_list *list); typedef int (*usb_mixer_elem_resume_func_t)(struct usb_mixer_elem_list *elem); struct usb_mixer_elem_list { struct usb_mixer_interface *mixer; struct usb_mixer_elem_list *next_id_elem; /* list of controls with same id */ struct snd_kcontrol *kctl; unsigned int id; usb_mixer_elem_dump_func_t dump; usb_mixer_elem_resume_func_t resume; }; struct usb_mixer_elem_info { struct usb_mixer_elem_list head; unsigned int control; /* CS or ICN (high byte) */ unsigned int cmask; /* channel mask bitmap: 0 = master */ unsigned int idx_off; /* Control index offset */ unsigned int ch_readonly; unsigned int master_readonly; int channels; int val_type; int min, max, res; int dBmin, dBmax; int cached; int cache_val[MAX_CHANNELS]; u8 initialized; void *private_data; }; int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif, int ignore_error); void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer); void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid); int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval, int request, int validx, int value_set); int snd_usb_mixer_add_control(struct usb_mixer_elem_list *list, struct snd_kcontrol *kctl); void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list, struct usb_mixer_interface *mixer, int unitid); int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag, unsigned int size, unsigned int __user *_tlv); #ifdef CONFIG_PM int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer); int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume); #endif int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel, int index, int value); int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval, int channel, int index, int *value); extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl); #endif /* __USBMIXER_H */ h: root/drivers/usb/misc/ehset.c
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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 /drivers/usb/misc/ehset.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 'drivers/usb/misc/ehset.c')