mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
c3aeda6287
Although some races in runtime PM refcount was fixed by the commit
[664c715573: ALSA: hda - Work around races of power up/down with
runtime PM], there is still a race in the following case:
CPU0: CPU1 :
runtime suspend:
codec->in_pm = 1
snd_hdac_power_up_pm():
pm_runtime_get_sync() skipped
suspend finished:
codec->in_pm = 0
snd_hdac_power_down_pm():
pm_runtime_put_*() is called!
For avoiding this situation, increment in_pm flag atomically when it's
non-zero, and decrement accordingly, to ensure that in_pm is set
consistently for the whole concurrent operations.
Also, since atomic_inc_not_zero() and atomic_dec_if_positive() are
lengthy inline functions, move snd_hdac_power_up_pm() and _down_pm()
to sound/hda/hdac_device.c as no inline functions.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
247 lines
6.6 KiB
C
247 lines
6.6 KiB
C
/*
|
|
* HD-audio core stuff
|
|
*/
|
|
|
|
#ifndef __SOUND_HDAUDIO_H
|
|
#define __SOUND_HDAUDIO_H
|
|
|
|
#include <linux/device.h>
|
|
#include <sound/hda_verbs.h>
|
|
|
|
/* codec node id */
|
|
typedef u16 hda_nid_t;
|
|
|
|
struct hdac_bus;
|
|
struct hdac_device;
|
|
struct hdac_driver;
|
|
struct hdac_widget_tree;
|
|
|
|
/*
|
|
* exported bus type
|
|
*/
|
|
extern struct bus_type snd_hda_bus_type;
|
|
|
|
/*
|
|
* generic arrays
|
|
*/
|
|
struct snd_array {
|
|
unsigned int used;
|
|
unsigned int alloced;
|
|
unsigned int elem_size;
|
|
unsigned int alloc_align;
|
|
void *list;
|
|
};
|
|
|
|
/*
|
|
* HD-audio codec base device
|
|
*/
|
|
struct hdac_device {
|
|
struct device dev;
|
|
int type;
|
|
struct hdac_bus *bus;
|
|
unsigned int addr; /* codec address */
|
|
struct list_head list; /* list point for bus codec_list */
|
|
|
|
hda_nid_t afg; /* AFG node id */
|
|
hda_nid_t mfg; /* MFG node id */
|
|
|
|
/* ids */
|
|
unsigned int vendor_id;
|
|
unsigned int subsystem_id;
|
|
unsigned int revision_id;
|
|
unsigned int afg_function_id;
|
|
unsigned int mfg_function_id;
|
|
unsigned int afg_unsol:1;
|
|
unsigned int mfg_unsol:1;
|
|
|
|
unsigned int power_caps; /* FG power caps */
|
|
|
|
const char *vendor_name; /* codec vendor name */
|
|
const char *chip_name; /* codec chip name */
|
|
|
|
/* verb exec op override */
|
|
int (*exec_verb)(struct hdac_device *dev, unsigned int cmd,
|
|
unsigned int flags, unsigned int *res);
|
|
|
|
/* widgets */
|
|
unsigned int num_nodes;
|
|
hda_nid_t start_nid, end_nid;
|
|
|
|
/* misc flags */
|
|
atomic_t in_pm; /* suspend/resume being performed */
|
|
|
|
/* sysfs */
|
|
struct hdac_widget_tree *widgets;
|
|
|
|
/* regmap */
|
|
struct regmap *regmap;
|
|
struct snd_array vendor_verbs;
|
|
bool lazy_cache:1; /* don't wake up for writes */
|
|
bool caps_overwriting:1; /* caps overwrite being in process */
|
|
bool cache_coef:1; /* cache COEF read/write too */
|
|
};
|
|
|
|
/* device/driver type used for matching */
|
|
enum {
|
|
HDA_DEV_CORE,
|
|
HDA_DEV_LEGACY,
|
|
};
|
|
|
|
/* direction */
|
|
enum {
|
|
HDA_INPUT, HDA_OUTPUT
|
|
};
|
|
|
|
#define dev_to_hdac_dev(_dev) container_of(_dev, struct hdac_device, dev)
|
|
|
|
int snd_hdac_device_init(struct hdac_device *dev, struct hdac_bus *bus,
|
|
const char *name, unsigned int addr);
|
|
void snd_hdac_device_exit(struct hdac_device *dev);
|
|
int snd_hdac_device_register(struct hdac_device *codec);
|
|
void snd_hdac_device_unregister(struct hdac_device *codec);
|
|
|
|
int snd_hdac_refresh_widgets(struct hdac_device *codec);
|
|
|
|
unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
|
|
unsigned int verb, unsigned int parm);
|
|
int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
|
|
unsigned int flags, unsigned int *res);
|
|
int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
|
|
unsigned int verb, unsigned int parm, unsigned int *res);
|
|
int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
|
|
unsigned int *res);
|
|
int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
|
|
int parm);
|
|
int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
|
|
unsigned int parm, unsigned int val);
|
|
int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
|
|
hda_nid_t *conn_list, int max_conns);
|
|
int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
|
|
hda_nid_t *start_id);
|
|
|
|
/**
|
|
* snd_hdac_read_parm - read a codec parameter
|
|
* @codec: the codec object
|
|
* @nid: NID to read a parameter
|
|
* @parm: parameter to read
|
|
*
|
|
* Returns -1 for error. If you need to distinguish the error more
|
|
* strictly, use _snd_hdac_read_parm() directly.
|
|
*/
|
|
static inline int snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid,
|
|
int parm)
|
|
{
|
|
unsigned int val;
|
|
|
|
return _snd_hdac_read_parm(codec, nid, parm, &val) < 0 ? -1 : val;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
void snd_hdac_power_up(struct hdac_device *codec);
|
|
void snd_hdac_power_down(struct hdac_device *codec);
|
|
void snd_hdac_power_up_pm(struct hdac_device *codec);
|
|
void snd_hdac_power_down_pm(struct hdac_device *codec);
|
|
#else
|
|
static inline void snd_hdac_power_up(struct hdac_device *codec) {}
|
|
static inline void snd_hdac_power_down(struct hdac_device *codec) {}
|
|
static inline void snd_hdac_power_up_pm(struct hdac_device *codec) {}
|
|
static inline void snd_hdac_power_down_pm(struct hdac_device *codec) {}
|
|
#endif
|
|
|
|
/*
|
|
* HD-audio codec base driver
|
|
*/
|
|
struct hdac_driver {
|
|
struct device_driver driver;
|
|
int type;
|
|
int (*match)(struct hdac_device *dev, struct hdac_driver *drv);
|
|
void (*unsol_event)(struct hdac_device *dev, unsigned int event);
|
|
};
|
|
|
|
#define drv_to_hdac_driver(_drv) container_of(_drv, struct hdac_driver, driver)
|
|
|
|
/*
|
|
* HD-audio bus base driver
|
|
*/
|
|
struct hdac_bus_ops {
|
|
/* send a single command */
|
|
int (*command)(struct hdac_bus *bus, unsigned int cmd);
|
|
/* get a response from the last command */
|
|
int (*get_response)(struct hdac_bus *bus, unsigned int addr,
|
|
unsigned int *res);
|
|
};
|
|
|
|
#define HDA_UNSOL_QUEUE_SIZE 64
|
|
|
|
struct hdac_bus {
|
|
struct device *dev;
|
|
const struct hdac_bus_ops *ops;
|
|
|
|
/* codec linked list */
|
|
struct list_head codec_list;
|
|
unsigned int num_codecs;
|
|
|
|
/* link caddr -> codec */
|
|
struct hdac_device *caddr_tbl[HDA_MAX_CODEC_ADDRESS + 1];
|
|
|
|
/* unsolicited event queue */
|
|
u32 unsol_queue[HDA_UNSOL_QUEUE_SIZE * 2]; /* ring buffer */
|
|
unsigned int unsol_rp, unsol_wp;
|
|
struct work_struct unsol_work;
|
|
|
|
/* bit flags of powered codecs */
|
|
unsigned long codec_powered;
|
|
|
|
/* flags */
|
|
bool sync_write:1; /* sync after verb write */
|
|
|
|
/* locks */
|
|
struct mutex cmd_mutex;
|
|
};
|
|
|
|
int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev,
|
|
const struct hdac_bus_ops *ops);
|
|
void snd_hdac_bus_exit(struct hdac_bus *bus);
|
|
int snd_hdac_bus_exec_verb(struct hdac_bus *bus, unsigned int addr,
|
|
unsigned int cmd, unsigned int *res);
|
|
int snd_hdac_bus_exec_verb_unlocked(struct hdac_bus *bus, unsigned int addr,
|
|
unsigned int cmd, unsigned int *res);
|
|
void snd_hdac_bus_queue_event(struct hdac_bus *bus, u32 res, u32 res_ex);
|
|
|
|
int snd_hdac_bus_add_device(struct hdac_bus *bus, struct hdac_device *codec);
|
|
void snd_hdac_bus_remove_device(struct hdac_bus *bus,
|
|
struct hdac_device *codec);
|
|
|
|
static inline void snd_hdac_codec_link_up(struct hdac_device *codec)
|
|
{
|
|
set_bit(codec->addr, &codec->bus->codec_powered);
|
|
}
|
|
|
|
static inline void snd_hdac_codec_link_down(struct hdac_device *codec)
|
|
{
|
|
clear_bit(codec->addr, &codec->bus->codec_powered);
|
|
}
|
|
|
|
/*
|
|
* generic array helpers
|
|
*/
|
|
void *snd_array_new(struct snd_array *array);
|
|
void snd_array_free(struct snd_array *array);
|
|
static inline void snd_array_init(struct snd_array *array, unsigned int size,
|
|
unsigned int align)
|
|
{
|
|
array->elem_size = size;
|
|
array->alloc_align = align;
|
|
}
|
|
|
|
static inline void *snd_array_elem(struct snd_array *array, unsigned int idx)
|
|
{
|
|
return array->list + idx * array->elem_size;
|
|
}
|
|
|
|
static inline unsigned int snd_array_index(struct snd_array *array, void *ptr)
|
|
{
|
|
return (unsigned long)(ptr - array->list) / array->elem_size;
|
|
}
|
|
|
|
#endif /* __SOUND_HDAUDIO_H */
|