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linux/include/sound/hdaudio.h
Kai Vehmanen f9e5fd1b66 ALSA: hda: add link_power op to hdac_bus_ops 
The extended HDA bus (hdac_ext) provides interfaces for more
fine-grained control of individual links than what plain HDA
provides for. Links can be powered off when they are not used and if
all links are released, controller can shut down the command DMA.

These interfaces are currently not used by common HDA codec drivers.
When a HDA codec is runtime suspended, it calls snd_hdac_codec_link_down(),
but there is no link to the HDA extended bus, and on controller side
the links are shut down only when all codecs are suspended.

This patch adds link_power() to hdac_bus ops. Controllers using the HDA
extended core, can use this to plug in snd_hdac_ext_bus_link_power() to
implement more fine-grained control of link power.

No change is needed for plain HDA controllers nor to existing HDA
codec drivers.

Co-developed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20210205184630.1938761-2-kai.vehmanen@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2021-02-08 15:56:35 +01:00

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/* SPDX-License-Identifier: GPL-2.0 */
/*
* HD-audio core stuff
*/
#ifndef __SOUND_HDAUDIO_H
#define __SOUND_HDAUDIO_H
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/pm_runtime.h>
#include <linux/timecounter.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/memalloc.h>
#include <sound/hda_verbs.h>
#include <drm/i915_component.h>
/* codec node id */
typedef u16 hda_nid_t;
struct hdac_bus;
struct hdac_stream;
struct hdac_device;
struct hdac_driver;
struct hdac_widget_tree;
struct hda_device_id;
/*
* 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 mutex widget_lock;
struct hdac_widget_tree *widgets;
/* regmap */
struct regmap *regmap;
struct mutex regmap_lock;
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,
HDA_DEV_ASOC,
};
enum {
SND_SKL_PCI_BIND_AUTO, /* automatic selection based on pci class */
SND_SKL_PCI_BIND_LEGACY,/* bind only with legacy driver */
SND_SKL_PCI_BIND_ASOC /* bind only with ASoC driver */
};
/* 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_device_set_chip_name(struct hdac_device *codec, const char *name);
int snd_hdac_codec_modalias(struct hdac_device *hdac, char *buf, size_t size);
int snd_hdac_refresh_widgets(struct hdac_device *codec);
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);
unsigned int snd_hdac_calc_stream_format(unsigned int rate,
unsigned int channels,
snd_pcm_format_t format,
unsigned int maxbps,
unsigned short spdif_ctls);
int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
u32 *ratesp, u64 *formatsp, unsigned int *bpsp);
bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
unsigned int format);
int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
int flags, unsigned int verb, unsigned int parm);
int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
int flags, unsigned int verb, unsigned int parm);
bool snd_hdac_check_power_state(struct hdac_device *hdac,
hda_nid_t nid, unsigned int target_state);
unsigned int snd_hdac_sync_power_state(struct hdac_device *hdac,
hda_nid_t nid, unsigned int target_state);
/**
* 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
int snd_hdac_power_up(struct hdac_device *codec);
int snd_hdac_power_down(struct hdac_device *codec);
int snd_hdac_power_up_pm(struct hdac_device *codec);
int snd_hdac_power_down_pm(struct hdac_device *codec);
int snd_hdac_keep_power_up(struct hdac_device *codec);
/* call this at entering into suspend/resume callbacks in codec driver */
static inline void snd_hdac_enter_pm(struct hdac_device *codec)
{
atomic_inc(&codec->in_pm);
}
/* call this at leaving from suspend/resume callbacks in codec driver */
static inline void snd_hdac_leave_pm(struct hdac_device *codec)
{
atomic_dec(&codec->in_pm);
}
static inline bool snd_hdac_is_in_pm(struct hdac_device *codec)
{
return atomic_read(&codec->in_pm);
}
static inline bool snd_hdac_is_power_on(struct hdac_device *codec)
{
return !pm_runtime_suspended(&codec->dev);
}
#else
static inline int snd_hdac_power_up(struct hdac_device *codec) { return 0; }
static inline int snd_hdac_power_down(struct hdac_device *codec) { return 0; }
static inline int snd_hdac_power_up_pm(struct hdac_device *codec) { return 0; }
static inline int snd_hdac_power_down_pm(struct hdac_device *codec) { return 0; }
static inline int snd_hdac_keep_power_up(struct hdac_device *codec) { return 0; }
static inline void snd_hdac_enter_pm(struct hdac_device *codec) {}
static inline void snd_hdac_leave_pm(struct hdac_device *codec) {}
static inline bool snd_hdac_is_in_pm(struct hdac_device *codec) { return false; }
static inline bool snd_hdac_is_power_on(struct hdac_device *codec) { return true; }
#endif
/*
* HD-audio codec base driver
*/
struct hdac_driver {
struct device_driver driver;
int type;
const struct hda_device_id *id_table;
int (*match)(struct hdac_device *dev, struct hdac_driver *drv);
void (*unsol_event)(struct hdac_device *dev, unsigned int event);
/* fields used by ext bus APIs */
int (*probe)(struct hdac_device *dev);
int (*remove)(struct hdac_device *dev);
void (*shutdown)(struct hdac_device *dev);
};
#define drv_to_hdac_driver(_drv) container_of(_drv, struct hdac_driver, driver)
const struct hda_device_id *
hdac_get_device_id(struct hdac_device *hdev, struct hdac_driver *drv);
/*
* Bus verb operators
*/
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);
/* notify of codec link power-up/down */
void (*link_power)(struct hdac_device *hdev, bool enable);
};
/*
* ops used for ASoC HDA codec drivers
*/
struct hdac_ext_bus_ops {
int (*hdev_attach)(struct hdac_device *hdev);
int (*hdev_detach)(struct hdac_device *hdev);
};
#define HDA_UNSOL_QUEUE_SIZE 64
#define HDA_MAX_CODECS 8 /* limit by controller side */
/*
* CORB/RIRB
*
* Each CORB entry is 4byte, RIRB is 8byte
*/
struct hdac_rb {
__le32 *buf; /* virtual address of CORB/RIRB buffer */
dma_addr_t addr; /* physical address of CORB/RIRB buffer */
unsigned short rp, wp; /* RIRB read/write pointers */
int cmds[HDA_MAX_CODECS]; /* number of pending requests */
u32 res[HDA_MAX_CODECS]; /* last read value */
};
/*
* HD-audio bus base driver
*
* @ppcap: pp capabilities pointer
* @spbcap: SPIB capabilities pointer
* @mlcap: MultiLink capabilities pointer
* @gtscap: gts capabilities pointer
* @drsmcap: dma resume capabilities pointer
* @num_streams: streams supported
* @idx: HDA link index
* @hlink_list: link list of HDA links
* @lock: lock for link and display power mgmt
* @cmd_dma_state: state of cmd DMAs: CORB and RIRB
*/
struct hdac_bus {
struct device *dev;
const struct hdac_bus_ops *ops;
const struct hdac_ext_bus_ops *ext_ops;
/* h/w resources */
unsigned long addr;
void __iomem *remap_addr;
int irq;
void __iomem *ppcap;
void __iomem *spbcap;
void __iomem *mlcap;
void __iomem *gtscap;
void __iomem *drsmcap;
/* 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 detected codecs */
unsigned long codec_mask;
/* bit flags of powered codecs */
unsigned long codec_powered;
/* CORB/RIRB */
struct hdac_rb corb;
struct hdac_rb rirb;
unsigned int last_cmd[HDA_MAX_CODECS]; /* last sent command */
wait_queue_head_t rirb_wq;
/* CORB/RIRB and position buffers */
struct snd_dma_buffer rb;
struct snd_dma_buffer posbuf;
int dma_type; /* SNDRV_DMA_TYPE_XXX for CORB/RIRB */
/* hdac_stream linked list */
struct list_head stream_list;
/* operation state */
bool chip_init:1; /* h/w initialized */
/* behavior flags */
bool aligned_mmio:1; /* aligned MMIO access */
bool sync_write:1; /* sync after verb write */
bool use_posbuf:1; /* use position buffer */
bool snoop:1; /* enable snooping */
bool align_bdle_4k:1; /* BDLE align 4K boundary */
bool reverse_assign:1; /* assign devices in reverse order */
bool corbrp_self_clear:1; /* CORBRP clears itself after reset */
bool polling_mode:1;
bool needs_damn_long_delay:1;
int poll_count;
int bdl_pos_adj; /* BDL position adjustment */
/* delay time in us for dma stop */
unsigned int dma_stop_delay;
/* locks */
spinlock_t reg_lock;
struct mutex cmd_mutex;
struct mutex lock;
/* DRM component interface */
struct drm_audio_component *audio_component;
long display_power_status;
unsigned long display_power_active;
/* parameters required for enhanced capabilities */
int num_streams;
int idx;
/* link management */
struct list_head hlink_list;
bool cmd_dma_state;
/* factor used to derive STRIPE control value */
unsigned int sdo_limit;
};
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_unlocked(struct hdac_bus *bus, unsigned int addr,
unsigned int cmd, unsigned int *res);
void snd_hdac_codec_link_up(struct hdac_device *codec);
void snd_hdac_codec_link_down(struct hdac_device *codec);
int snd_hdac_bus_send_cmd(struct hdac_bus *bus, unsigned int val);
int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
unsigned int *res);
int snd_hdac_bus_parse_capabilities(struct hdac_bus *bus);
bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset);
void snd_hdac_bus_stop_chip(struct hdac_bus *bus);
void snd_hdac_bus_init_cmd_io(struct hdac_bus *bus);
void snd_hdac_bus_stop_cmd_io(struct hdac_bus *bus);
void snd_hdac_bus_enter_link_reset(struct hdac_bus *bus);
void snd_hdac_bus_exit_link_reset(struct hdac_bus *bus);
int snd_hdac_bus_reset_link(struct hdac_bus *bus, bool full_reset);
void snd_hdac_bus_link_power(struct hdac_device *hdev, bool enable);
void snd_hdac_bus_update_rirb(struct hdac_bus *bus);
int snd_hdac_bus_handle_stream_irq(struct hdac_bus *bus, unsigned int status,
void (*ack)(struct hdac_bus *,
struct hdac_stream *));
int snd_hdac_bus_alloc_stream_pages(struct hdac_bus *bus);
void snd_hdac_bus_free_stream_pages(struct hdac_bus *bus);
#ifdef CONFIG_SND_HDA_ALIGNED_MMIO
unsigned int snd_hdac_aligned_read(void __iomem *addr, unsigned int mask);
void snd_hdac_aligned_write(unsigned int val, void __iomem *addr,
unsigned int mask);
#define snd_hdac_aligned_mmio(bus) (bus)->aligned_mmio
#else
#define snd_hdac_aligned_mmio(bus) false
#define snd_hdac_aligned_read(addr, mask) 0
#define snd_hdac_aligned_write(val, addr, mask) do {} while (0)
#endif
static inline void snd_hdac_reg_writeb(struct hdac_bus *bus, void __iomem *addr,
u8 val)
{
if (snd_hdac_aligned_mmio(bus))
snd_hdac_aligned_write(val, addr, 0xff);
else
writeb(val, addr);
}
static inline void snd_hdac_reg_writew(struct hdac_bus *bus, void __iomem *addr,
u16 val)
{
if (snd_hdac_aligned_mmio(bus))
snd_hdac_aligned_write(val, addr, 0xffff);
else
writew(val, addr);
}
static inline u8 snd_hdac_reg_readb(struct hdac_bus *bus, void __iomem *addr)
{
return snd_hdac_aligned_mmio(bus) ?
snd_hdac_aligned_read(addr, 0xff) : readb(addr);
}
static inline u16 snd_hdac_reg_readw(struct hdac_bus *bus, void __iomem *addr)
{
return snd_hdac_aligned_mmio(bus) ?
snd_hdac_aligned_read(addr, 0xffff) : readw(addr);
}
#define snd_hdac_reg_writel(bus, addr, val) writel(val, addr)
#define snd_hdac_reg_readl(bus, addr) readl(addr)
/*
* macros for easy use
*/
#define _snd_hdac_chip_writeb(chip, reg, value) \
snd_hdac_reg_writeb(chip, (chip)->remap_addr + (reg), value)
#define _snd_hdac_chip_readb(chip, reg) \
snd_hdac_reg_readb(chip, (chip)->remap_addr + (reg))
#define _snd_hdac_chip_writew(chip, reg, value) \
snd_hdac_reg_writew(chip, (chip)->remap_addr + (reg), value)
#define _snd_hdac_chip_readw(chip, reg) \
snd_hdac_reg_readw(chip, (chip)->remap_addr + (reg))
#define _snd_hdac_chip_writel(chip, reg, value) \
snd_hdac_reg_writel(chip, (chip)->remap_addr + (reg), value)
#define _snd_hdac_chip_readl(chip, reg) \
snd_hdac_reg_readl(chip, (chip)->remap_addr + (reg))
/* read/write a register, pass without AZX_REG_ prefix */
#define snd_hdac_chip_writel(chip, reg, value) \
_snd_hdac_chip_writel(chip, AZX_REG_ ## reg, value)
#define snd_hdac_chip_writew(chip, reg, value) \
_snd_hdac_chip_writew(chip, AZX_REG_ ## reg, value)
#define snd_hdac_chip_writeb(chip, reg, value) \
_snd_hdac_chip_writeb(chip, AZX_REG_ ## reg, value)
#define snd_hdac_chip_readl(chip, reg) \
_snd_hdac_chip_readl(chip, AZX_REG_ ## reg)
#define snd_hdac_chip_readw(chip, reg) \
_snd_hdac_chip_readw(chip, AZX_REG_ ## reg)
#define snd_hdac_chip_readb(chip, reg) \
_snd_hdac_chip_readb(chip, AZX_REG_ ## reg)
/* update a register, pass without AZX_REG_ prefix */
#define snd_hdac_chip_updatel(chip, reg, mask, val) \
snd_hdac_chip_writel(chip, reg, \
(snd_hdac_chip_readl(chip, reg) & ~(mask)) | (val))
#define snd_hdac_chip_updatew(chip, reg, mask, val) \
snd_hdac_chip_writew(chip, reg, \
(snd_hdac_chip_readw(chip, reg) & ~(mask)) | (val))
#define snd_hdac_chip_updateb(chip, reg, mask, val) \
snd_hdac_chip_writeb(chip, reg, \
(snd_hdac_chip_readb(chip, reg) & ~(mask)) | (val))
/*
* HD-audio stream
*/
struct hdac_stream {
struct hdac_bus *bus;
struct snd_dma_buffer bdl; /* BDL buffer */
__le32 *posbuf; /* position buffer pointer */
int direction; /* playback / capture (SNDRV_PCM_STREAM_*) */
unsigned int bufsize; /* size of the play buffer in bytes */
unsigned int period_bytes; /* size of the period in bytes */
unsigned int frags; /* number for period in the play buffer */
unsigned int fifo_size; /* FIFO size */
void __iomem *sd_addr; /* stream descriptor pointer */
u32 sd_int_sta_mask; /* stream int status mask */
/* pcm support */
struct snd_pcm_substream *substream; /* assigned substream,
* set in PCM open
*/
struct snd_compr_stream *cstream;
unsigned int format_val; /* format value to be set in the
* controller and the codec
*/
unsigned char stream_tag; /* assigned stream */
unsigned char index; /* stream index */
int assigned_key; /* last device# key assigned to */
bool opened:1;
bool running:1;
bool prepared:1;
bool no_period_wakeup:1;
bool locked:1;
bool stripe:1; /* apply stripe control */
u64 curr_pos;
/* timestamp */
unsigned long start_wallclk; /* start + minimum wallclk */
unsigned long period_wallclk; /* wallclk for period */
struct timecounter tc;
struct cyclecounter cc;
int delay_negative_threshold;
struct list_head list;
#ifdef CONFIG_SND_HDA_DSP_LOADER
/* DSP access mutex */
struct mutex dsp_mutex;
#endif
};
void snd_hdac_stream_init(struct hdac_bus *bus, struct hdac_stream *azx_dev,
int idx, int direction, int tag);
struct hdac_stream *snd_hdac_stream_assign(struct hdac_bus *bus,
struct snd_pcm_substream *substream);
void snd_hdac_stream_release(struct hdac_stream *azx_dev);
struct hdac_stream *snd_hdac_get_stream(struct hdac_bus *bus,
int dir, int stream_tag);
int snd_hdac_stream_setup(struct hdac_stream *azx_dev);
void snd_hdac_stream_cleanup(struct hdac_stream *azx_dev);
int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev);
int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
unsigned int format_val);
void snd_hdac_stream_start(struct hdac_stream *azx_dev, bool fresh_start);
void snd_hdac_stream_clear(struct hdac_stream *azx_dev);
void snd_hdac_stream_stop(struct hdac_stream *azx_dev);
void snd_hdac_stream_reset(struct hdac_stream *azx_dev);
void snd_hdac_stream_sync_trigger(struct hdac_stream *azx_dev, bool set,
unsigned int streams, unsigned int reg);
void snd_hdac_stream_sync(struct hdac_stream *azx_dev, bool start,
unsigned int streams);
void snd_hdac_stream_timecounter_init(struct hdac_stream *azx_dev,
unsigned int streams);
int snd_hdac_get_stream_stripe_ctl(struct hdac_bus *bus,
struct snd_pcm_substream *substream);
/*
* macros for easy use
*/
/* read/write a register, pass without AZX_REG_ prefix */
#define snd_hdac_stream_writel(dev, reg, value) \
snd_hdac_reg_writel((dev)->bus, (dev)->sd_addr + AZX_REG_ ## reg, value)
#define snd_hdac_stream_writew(dev, reg, value) \
snd_hdac_reg_writew((dev)->bus, (dev)->sd_addr + AZX_REG_ ## reg, value)
#define snd_hdac_stream_writeb(dev, reg, value) \
snd_hdac_reg_writeb((dev)->bus, (dev)->sd_addr + AZX_REG_ ## reg, value)
#define snd_hdac_stream_readl(dev, reg) \
snd_hdac_reg_readl((dev)->bus, (dev)->sd_addr + AZX_REG_ ## reg)
#define snd_hdac_stream_readw(dev, reg) \
snd_hdac_reg_readw((dev)->bus, (dev)->sd_addr + AZX_REG_ ## reg)
#define snd_hdac_stream_readb(dev, reg) \
snd_hdac_reg_readb((dev)->bus, (dev)->sd_addr + AZX_REG_ ## reg)
/* update a register, pass without AZX_REG_ prefix */
#define snd_hdac_stream_updatel(dev, reg, mask, val) \
snd_hdac_stream_writel(dev, reg, \
(snd_hdac_stream_readl(dev, reg) & \
~(mask)) | (val))
#define snd_hdac_stream_updatew(dev, reg, mask, val) \
snd_hdac_stream_writew(dev, reg, \
(snd_hdac_stream_readw(dev, reg) & \
~(mask)) | (val))
#define snd_hdac_stream_updateb(dev, reg, mask, val) \
snd_hdac_stream_writeb(dev, reg, \
(snd_hdac_stream_readb(dev, reg) & \
~(mask)) | (val))
#ifdef CONFIG_SND_HDA_DSP_LOADER
/* DSP lock helpers */
#define snd_hdac_dsp_lock_init(dev) mutex_init(&(dev)->dsp_mutex)
#define snd_hdac_dsp_lock(dev) mutex_lock(&(dev)->dsp_mutex)
#define snd_hdac_dsp_unlock(dev) mutex_unlock(&(dev)->dsp_mutex)
#define snd_hdac_stream_is_locked(dev) ((dev)->locked)
/* DSP loader helpers */
int snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
unsigned int byte_size, struct snd_dma_buffer *bufp);
void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start);
void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
struct snd_dma_buffer *dmab);
#else /* CONFIG_SND_HDA_DSP_LOADER */
#define snd_hdac_dsp_lock_init(dev) do {} while (0)
#define snd_hdac_dsp_lock(dev) do {} while (0)
#define snd_hdac_dsp_unlock(dev) do {} while (0)
#define snd_hdac_stream_is_locked(dev) 0
static inline int
snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
unsigned int byte_size, struct snd_dma_buffer *bufp)
{
return 0;
}
static inline void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start)
{
}
static inline void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
struct snd_dma_buffer *dmab)
{
}
#endif /* CONFIG_SND_HDA_DSP_LOADER */
/*
* 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;
}
/* a helper macro to iterate for each snd_array element */
#define snd_array_for_each(array, idx, ptr) \
for ((idx) = 0, (ptr) = (array)->list; (idx) < (array)->used; \
(ptr) = snd_array_elem(array, ++(idx)))
#endif /* __SOUND_HDAUDIO_H */
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