Commit d8a766a1 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: hda - Bind codecs via standard bus 



Now we create the standard HD-audio bus (/sys/bus/hdaudio), and bind
the codec driver with the codec device over there.  This is the first
step of the whole transition so that the changes to each codec driver
are kept as minimal as possible.

Each codec driver needs to register hda_codec_driver struct containing
the currently existing preset via the new helper macro
module_hda_codec_driver().  The old hda_codec_preset_list is replaced
with this infrastructure.  The generic parsers (for HDMI and other)
are also included in the preset with the special IDs to bind
uniquely.

In HD-audio core side, the device binding code is split to
hda_bind.c.  It provides the snd_hda_bus_type implementation to match
the codec driver with the given codec vendor ID.  It also manages the
module auto-loading by itself like before: when the matching isn't
found, it tries to probe the corresponding codec modules, and finally
falls back to the generic drivers.  (The special ID mentioned above is
set at this stage.)

The only visible change to outside is that the hdaudio sysfs entry now
appears in /sys/bus/devices, not as a sound class device.

More works to move the suspend/resume and remove ops will be
(hopefully) done in later patches.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 327ef4f0

sound/pci/hda/Makefile

+1 −1
Original line number Original line Diff line number Diff line
@@ -4,7 +4,7 @@ snd-hda-tegra-objs := hda_tegra.o 
# for haswell power well

# for haswell power well

snd-hda-intel-$(CONFIG_SND_HDA_I915) +=	hda_i915.o

snd-hda-intel-$(CONFIG_SND_HDA_I915) +=	hda_i915.o





snd-hda-codec-y := hda_codec.o hda_jack.o hda_auto_parser.o hda_sysfs.o

snd-hda-codec-y := hda_bind.o hda_codec.o hda_jack.o hda_auto_parser.o hda_sysfs.o

snd-hda-codec-$(CONFIG_PROC_FS) += hda_proc.o

snd-hda-codec-$(CONFIG_PROC_FS) += hda_proc.o

snd-hda-codec-$(CONFIG_SND_HDA_HWDEP) += hda_hwdep.o

snd-hda-codec-$(CONFIG_SND_HDA_HWDEP) += hda_hwdep.o

snd-hda-codec-$(CONFIG_SND_HDA_INPUT_BEEP) += hda_beep.o

snd-hda-codec-$(CONFIG_SND_HDA_INPUT_BEEP) += hda_beep.o

sound/pci/hda/hda_bind.c

0 → 100644
+320 −0
Original line number Original line Diff line number Diff line 
/*

 * HD-audio codec driver binding

 * Copyright (c) Takashi Iwai <tiwai@suse.de>

 */



#include <linux/init.h>

#include <linux/slab.h>

#include <linux/mutex.h>

#include <linux/module.h>

#include <linux/export.h>

#include <sound/core.h>

#include "hda_codec.h"

#include "hda_local.h"



/* codec vendor labels */

struct hda_vendor_id {

	unsigned int id;

	const char *name;

};



static struct hda_vendor_id hda_vendor_ids[] = {

	{ 0x1002, "ATI" },

	{ 0x1013, "Cirrus Logic" },

	{ 0x1057, "Motorola" },

	{ 0x1095, "Silicon Image" },

	{ 0x10de, "Nvidia" },

	{ 0x10ec, "Realtek" },

	{ 0x1102, "Creative" },

	{ 0x1106, "VIA" },

	{ 0x111d, "IDT" },

	{ 0x11c1, "LSI" },

	{ 0x11d4, "Analog Devices" },

	{ 0x13f6, "C-Media" },

	{ 0x14f1, "Conexant" },

	{ 0x17e8, "Chrontel" },

	{ 0x1854, "LG" },

	{ 0x1aec, "Wolfson Microelectronics" },

	{ 0x1af4, "QEMU" },

	{ 0x434d, "C-Media" },

	{ 0x8086, "Intel" },

	{ 0x8384, "SigmaTel" },

	{} /* terminator */

};



/*

 * find a matching codec preset

 */

static int hda_bus_match(struct device *dev, struct device_driver *drv)

{

	struct hda_codec *codec = container_of(dev, struct hda_codec, dev);

	struct hda_codec_driver *driver =

		container_of(drv, struct hda_codec_driver, driver);

	const struct hda_codec_preset *preset;

	/* check probe_id instead of vendor_id if set */

	u32 id = codec->probe_id ? codec->probe_id : codec->vendor_id;



	for (preset = driver->preset; preset->id; preset++) {

		u32 mask = preset->mask;



		if (preset->afg && preset->afg != codec->afg)

			continue;

		if (preset->mfg && preset->mfg != codec->mfg)

			continue;

		if (!mask)

			mask = ~0;

		if (preset->id == (id & mask) &&

		    (!preset->rev || preset->rev == codec->revision_id)) {

			codec->preset = preset;

			return 1;

		}

	}

	return 0;

}



/* reset the codec name from the preset */

static int codec_refresh_name(struct hda_codec *codec, const char *name)

{

	char tmp[16];



	kfree(codec->chip_name);

	if (!name) {

		sprintf(tmp, "ID %x", codec->vendor_id & 0xffff);

		name = tmp;

	}

	codec->chip_name = kstrdup(name, GFP_KERNEL);

	return codec->chip_name ? 0 : -ENOMEM;

}



static int hda_codec_driver_probe(struct device *dev)

{

	struct hda_codec *codec = dev_to_hda_codec(dev);

	struct module *owner = dev->driver->owner;

	int err;



	if (WARN_ON(!codec->preset))

		return -EINVAL;



	err = codec_refresh_name(codec, codec->preset->name);

	if (err < 0)

		goto error;



	if (!try_module_get(owner)) {

		err = -EINVAL;

		goto error;

	}



	err = codec->preset->patch(codec);

	if (err < 0) {

		module_put(owner);

		goto error;

	}



	return 0;



 error:

	codec->preset = NULL;

	memset(&codec->patch_ops, 0, sizeof(codec->patch_ops));

	return err;

}



static int hda_codec_driver_remove(struct device *dev)

{

	struct hda_codec *codec = dev_to_hda_codec(dev);



	if (codec->patch_ops.free)

		codec->patch_ops.free(codec);

	codec->preset = NULL;

	memset(&codec->patch_ops, 0, sizeof(codec->patch_ops));

	module_put(dev->driver->owner);

	return 0;

}



int __hda_codec_driver_register(struct hda_codec_driver *drv, const char *name,

			       struct module *owner)

{

	drv->driver.name = name;

	drv->driver.owner = owner;

	drv->driver.bus = &snd_hda_bus_type;

	drv->driver.probe = hda_codec_driver_probe;

	drv->driver.remove = hda_codec_driver_remove;

	/* TODO: PM and others */

	return driver_register(&drv->driver);

}

EXPORT_SYMBOL_GPL(__hda_codec_driver_register);



void hda_codec_driver_unregister(struct hda_codec_driver *drv)

{

	driver_unregister(&drv->driver);

}

EXPORT_SYMBOL_GPL(hda_codec_driver_unregister);



static inline bool codec_probed(struct hda_codec *codec)

{

	return device_attach(hda_codec_dev(codec)) > 0 && codec->preset;

}



/* try to auto-load and bind the codec module */

static void codec_bind_module(struct hda_codec *codec)

{

#ifdef MODULE

	request_module("snd-hda-codec-id:%08x", codec->vendor_id);

	if (codec_probed(codec))

		return;

	request_module("snd-hda-codec-id:%04x*",

		       (codec->vendor_id >> 16) & 0xffff);

	if (codec_probed(codec))

		return;

#endif

}



/* store the codec vendor name */

static int get_codec_vendor_name(struct hda_codec *codec)

{

	const struct hda_vendor_id *c;

	const char *vendor = NULL;

	u16 vendor_id = codec->vendor_id >> 16;

	char tmp[16];



	for (c = hda_vendor_ids; c->id; c++) {

		if (c->id == vendor_id) {

			vendor = c->name;

			break;

		}

	}

	if (!vendor) {

		sprintf(tmp, "Generic %04x", vendor_id);

		vendor = tmp;

	}

	codec->vendor_name = kstrdup(vendor, GFP_KERNEL);

	if (!codec->vendor_name)

		return -ENOMEM;

	return 0;

}



#if IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI)

/* if all audio out widgets are digital, let's assume the codec as a HDMI/DP */

static bool is_likely_hdmi_codec(struct hda_codec *codec)

{

	hda_nid_t nid = codec->start_nid;

	int i;



	for (i = 0; i < codec->num_nodes; i++, nid++) {

		unsigned int wcaps = get_wcaps(codec, nid);

		switch (get_wcaps_type(wcaps)) {

		case AC_WID_AUD_IN:

			return false; /* HDMI parser supports only HDMI out */

		case AC_WID_AUD_OUT:

			if (!(wcaps & AC_WCAP_DIGITAL))

				return false;

			break;

		}

	}

	return true;

}

#else

/* no HDMI codec parser support */

#define is_likely_hdmi_codec(codec)	false

#endif /* CONFIG_SND_HDA_CODEC_HDMI */



static int codec_bind_generic(struct hda_codec *codec)

{

	if (codec->probe_id)

		return -ENODEV;



	if (is_likely_hdmi_codec(codec)) {

		codec->probe_id = HDA_CODEC_ID_GENERIC_HDMI;

#if IS_MODULE(CONFIG_SND_HDA_CODEC_HDMI)

		request_module("snd-hda-codec-hdmi");

#endif

		if (codec_probed(codec))

			return 0;

	}



	codec->probe_id = HDA_CODEC_ID_GENERIC;

#if IS_MODULE(CONFIG_SND_HDA_GENERIC)

	request_module("snd-hda-codec-generic");

#endif

	if (codec_probed(codec))

		return 0;

	return -ENODEV;

}



#if IS_ENABLED(CONFIG_SND_HDA_GENERIC)

#define is_generic_config(codec) \

	(codec->modelname && !strcmp(codec->modelname, "generic"))

#else

#define is_generic_config(codec)	0

#endif



/**

 * snd_hda_codec_configure - (Re-)configure the HD-audio codec

 * @codec: the HDA codec

 *

 * Start parsing of the given codec tree and (re-)initialize the whole

 * patch instance.

 *

 * Returns 0 if successful or a negative error code.

 */

int snd_hda_codec_configure(struct hda_codec *codec)

{

	int err;



	if (!codec->vendor_name) {

		err = get_codec_vendor_name(codec);

		if (err < 0)

			return err;

	}



	if (is_generic_config(codec))

		codec->probe_id = HDA_CODEC_ID_GENERIC;

	else

		codec->probe_id = 0;



	err = device_add(hda_codec_dev(codec));

	if (err < 0)

		return err;



	if (!codec->preset)

		codec_bind_module(codec);

	if (!codec->preset) {

		err = codec_bind_generic(codec);

		if (err < 0) {

			codec_err(codec, "Unable to bind the codec\n");

			goto error;

		}

	}



	/* audio codec should override the mixer name */

	if (codec->afg || !*codec->bus->card->mixername)

		snprintf(codec->bus->card->mixername,

			 sizeof(codec->bus->card->mixername),

			 "%s %s", codec->vendor_name, codec->chip_name);

	return 0;



 error:

	device_del(hda_codec_dev(codec));

	return err;

}

EXPORT_SYMBOL_GPL(snd_hda_codec_configure);



/*

 * bus registration

 */

struct bus_type snd_hda_bus_type = {

	.name = "hdaudio",

	.match = hda_bus_match,

};



static int __init hda_codec_init(void)

{

	return bus_register(&snd_hda_bus_type);

}



static void __exit hda_codec_exit(void)

{

	bus_unregister(&snd_hda_bus_type);

}



module_init(hda_codec_init);

module_exit(hda_codec_exit);

sound/pci/hda/hda_codec.c

+16 −291
Original line number Original line Diff line number Diff line
@@ -40,69 +40,6 @@ 
#define CREATE_TRACE_POINTS

#define CREATE_TRACE_POINTS

#include "hda_trace.h"

#include "hda_trace.h"





/*

 * vendor / preset table

 */



struct hda_vendor_id {

	unsigned int id;

	const char *name;

};



/* codec vendor labels */

static struct hda_vendor_id hda_vendor_ids[] = {

	{ 0x1002, "ATI" },

	{ 0x1013, "Cirrus Logic" },

	{ 0x1057, "Motorola" },

	{ 0x1095, "Silicon Image" },

	{ 0x10de, "Nvidia" },

	{ 0x10ec, "Realtek" },

	{ 0x1102, "Creative" },

	{ 0x1106, "VIA" },

	{ 0x111d, "IDT" },

	{ 0x11c1, "LSI" },

	{ 0x11d4, "Analog Devices" },

	{ 0x13f6, "C-Media" },

	{ 0x14f1, "Conexant" },

	{ 0x17e8, "Chrontel" },

	{ 0x1854, "LG" },

	{ 0x1aec, "Wolfson Microelectronics" },

	{ 0x1af4, "QEMU" },

	{ 0x434d, "C-Media" },

	{ 0x8086, "Intel" },

	{ 0x8384, "SigmaTel" },

	{} /* terminator */

};



static DEFINE_MUTEX(preset_mutex);

static LIST_HEAD(hda_preset_tables);



/**

 * snd_hda_add_codec_preset - Add a codec preset to the chain

 * @preset: codec preset table to add

 */

int snd_hda_add_codec_preset(struct hda_codec_preset_list *preset)

{

	mutex_lock(&preset_mutex);

	list_add_tail(&preset->list, &hda_preset_tables);

	mutex_unlock(&preset_mutex);

	return 0;

}

EXPORT_SYMBOL_GPL(snd_hda_add_codec_preset);



/**

 * snd_hda_delete_codec_preset - Delete a codec preset from the chain

 * @preset: codec preset table to delete

 */

int snd_hda_delete_codec_preset(struct hda_codec_preset_list *preset)

{

	mutex_lock(&preset_mutex);

	list_del(&preset->list);

	mutex_unlock(&preset_mutex);

	return 0;

}

EXPORT_SYMBOL_GPL(snd_hda_delete_codec_preset);



#ifdef CONFIG_PM

#ifdef CONFIG_PM

#define codec_in_pm(codec)	((codec)->in_pm)

#define codec_in_pm(codec)	((codec)->in_pm)

static void hda_power_work(struct work_struct *work);

static void hda_power_work(struct work_struct *work);
@@ -885,111 +822,6 @@ int snd_hda_bus_new(struct snd_card *card, 
}

}

EXPORT_SYMBOL_GPL(snd_hda_bus_new);

EXPORT_SYMBOL_GPL(snd_hda_bus_new);





#if IS_ENABLED(CONFIG_SND_HDA_GENERIC)

#define is_generic_config(codec) \

	(codec->modelname && !strcmp(codec->modelname, "generic"))

#else

#define is_generic_config(codec)	0

#endif



#ifdef MODULE

#define HDA_MODREQ_MAX_COUNT	2	/* two request_modules()'s */

#else

#define HDA_MODREQ_MAX_COUNT	0	/* all presets are statically linked */

#endif



/*

 * find a matching codec preset

 */

static const struct hda_codec_preset *

find_codec_preset(struct hda_codec *codec)

{

	struct hda_codec_preset_list *tbl;

	const struct hda_codec_preset *preset;

	unsigned int mod_requested = 0;



 again:

	mutex_lock(&preset_mutex);

	list_for_each_entry(tbl, &hda_preset_tables, list) {

		if (!try_module_get(tbl->owner)) {

			codec_err(codec, "cannot module_get\n");

			continue;

		}

		for (preset = tbl->preset; preset->id; preset++) {

			u32 mask = preset->mask;

			if (preset->afg && preset->afg != codec->afg)

				continue;

			if (preset->mfg && preset->mfg != codec->mfg)

				continue;

			if (!mask)

				mask = ~0;

			if (preset->id == (codec->vendor_id & mask) &&

			    (!preset->rev ||

			     preset->rev == codec->revision_id)) {

				mutex_unlock(&preset_mutex);

				codec->owner = tbl->owner;

				return preset;

			}

		}

		module_put(tbl->owner);

	}

	mutex_unlock(&preset_mutex);



	if (mod_requested < HDA_MODREQ_MAX_COUNT) {

		if (!mod_requested)

			request_module("snd-hda-codec-id:%08x",

				       codec->vendor_id);

		else

			request_module("snd-hda-codec-id:%04x*",

				       (codec->vendor_id >> 16) & 0xffff);

		mod_requested++;

		goto again;

	}

	return NULL;

}



/*

 * get_codec_name - store the codec name

 */

static int get_codec_name(struct hda_codec *codec)

{

	const struct hda_vendor_id *c;

	const char *vendor = NULL;

	u16 vendor_id = codec->vendor_id >> 16;

	char tmp[16];



	if (codec->vendor_name)

		goto get_chip_name;



	for (c = hda_vendor_ids; c->id; c++) {

		if (c->id == vendor_id) {

			vendor = c->name;

			break;

		}

	}

	if (!vendor) {

		sprintf(tmp, "Generic %04x", vendor_id);

		vendor = tmp;

	}

	codec->vendor_name = kstrdup(vendor, GFP_KERNEL);

	if (!codec->vendor_name)

		return -ENOMEM;



 get_chip_name:

	if (codec->chip_name)

		return 0;



	if (codec->preset && codec->preset->name)

		codec->chip_name = kstrdup(codec->preset->name, GFP_KERNEL);

	else {

		sprintf(tmp, "ID %x", codec->vendor_id & 0xffff);

		codec->chip_name = kstrdup(tmp, GFP_KERNEL);

	}

	if (!codec->chip_name)

		return -ENOMEM;

	return 0;

}



/*

/*

 * look for an AFG and MFG nodes

 * look for an AFG and MFG nodes

 */

 */
@@ -1300,20 +1132,6 @@ get_hda_cvt_setup(struct hda_codec *codec, hda_nid_t nid) 
	return p;

	return p;

}

}





/*

 * Dynamic symbol binding for the codec parsers

 */



#define load_parser(codec, sym) \

	((codec)->parser = (int (*)(struct hda_codec *))symbol_request(sym))



static void unload_parser(struct hda_codec *codec)

{

	if (codec->parser)

		symbol_put_addr(codec->parser);

	codec->parser = NULL;

}



/*

/*

 * codec destructor

 * codec destructor

 */

 */
@@ -1322,6 +1140,8 @@ static void snd_hda_codec_free(struct hda_codec *codec) 
	if (!codec)

	if (!codec)

		return;

		return;

	cancel_delayed_work_sync(&codec->jackpoll_work);

	cancel_delayed_work_sync(&codec->jackpoll_work);

	if (device_is_registered(hda_codec_dev(codec)))

		device_del(hda_codec_dev(codec));

	snd_hda_jack_tbl_clear(codec);

	snd_hda_jack_tbl_clear(codec);

	free_init_pincfgs(codec);

	free_init_pincfgs(codec);

#ifdef CONFIG_PM

#ifdef CONFIG_PM
@@ -1335,12 +1155,8 @@ static void snd_hda_codec_free(struct hda_codec *codec) 
	snd_array_free(&codec->spdif_out);

	snd_array_free(&codec->spdif_out);

	remove_conn_list(codec);

	remove_conn_list(codec);

	codec->bus->caddr_tbl[codec->addr] = NULL;

	codec->bus->caddr_tbl[codec->addr] = NULL;

	if (codec->patch_ops.free)

		codec->patch_ops.free(codec);

	hda_call_pm_notify(codec, false); /* cancel leftover refcounts */

	hda_call_pm_notify(codec, false); /* cancel leftover refcounts */

	snd_hda_sysfs_clear(codec);

	snd_hda_sysfs_clear(codec);

	unload_parser(codec);

	module_put(codec->owner);

	free_hda_cache(&codec->amp_cache);

	free_hda_cache(&codec->amp_cache);

	free_hda_cache(&codec->cmd_cache);

	free_hda_cache(&codec->cmd_cache);

	kfree(codec->vendor_name);

	kfree(codec->vendor_name);
@@ -1348,7 +1164,7 @@ static void snd_hda_codec_free(struct hda_codec *codec) 
	kfree(codec->modelname);

	kfree(codec->modelname);

	kfree(codec->wcaps);

	kfree(codec->wcaps);

	codec->bus->num_codecs--;

	codec->bus->num_codecs--;

	put_device(&codec->dev);

	put_device(hda_codec_dev(codec));

}

}





static bool snd_hda_codec_get_supported_ps(struct hda_codec *codec,

static bool snd_hda_codec_get_supported_ps(struct hda_codec *codec,
@@ -1360,10 +1176,7 @@ static unsigned int hda_set_power_state(struct hda_codec *codec, 
static int snd_hda_codec_dev_register(struct snd_device *device)

static int snd_hda_codec_dev_register(struct snd_device *device)

{

{

	struct hda_codec *codec = device->device_data;

	struct hda_codec *codec = device->device_data;

	int err = device_add(&codec->dev);





	if (err < 0)

		return err;

	snd_hda_register_beep_device(codec);

	snd_hda_register_beep_device(codec);

	return 0;

	return 0;

}

}
@@ -1373,7 +1186,6 @@ static int snd_hda_codec_dev_disconnect(struct snd_device *device) 
	struct hda_codec *codec = device->device_data;

	struct hda_codec *codec = device->device_data;





	snd_hda_detach_beep_device(codec);

	snd_hda_detach_beep_device(codec);

	device_del(&codec->dev);

	return 0;

	return 0;

}

}
@@ -1386,7 +1198,7 @@ static int snd_hda_codec_dev_free(struct snd_device *device) 
/* just free the container */

/* just free the container */

static void snd_hda_codec_dev_release(struct device *dev)

static void snd_hda_codec_dev_release(struct device *dev)

{

{

	kfree(container_of(dev, struct hda_codec, dev));

	kfree(dev_to_hda_codec(dev));

}

}





/**

/**
@@ -1402,6 +1214,7 @@ int snd_hda_codec_new(struct hda_bus *bus, 
				struct hda_codec **codecp)

				struct hda_codec **codecp)

{

{

	struct hda_codec *codec;

	struct hda_codec *codec;

	struct device *dev;

	char component[31];

	char component[31];

	hda_nid_t fg;

	hda_nid_t fg;

	int err;

	int err;
@@ -1429,14 +1242,14 @@ int snd_hda_codec_new(struct hda_bus *bus, 
		return -ENOMEM;

		return -ENOMEM;

	}

	}





	device_initialize(&codec->dev);

	dev = hda_codec_dev(codec);

	codec->dev.parent = &bus->card->card_dev;

	device_initialize(dev);

	codec->dev.class = sound_class;

	dev->parent = bus->card->dev;

	codec->dev.release = snd_hda_codec_dev_release;

	dev->bus = &snd_hda_bus_type;

	codec->dev.groups = snd_hda_dev_attr_groups;

	dev->release = snd_hda_codec_dev_release;

	dev_set_name(&codec->dev, "hdaudioC%dD%d", bus->card->number,

	dev->groups = snd_hda_dev_attr_groups;

		     codec_addr);

	dev_set_name(dev, "hdaudioC%dD%d", bus->card->number, codec_addr);

	dev_set_drvdata(&codec->dev, codec); /* for sysfs */

	dev_set_drvdata(dev, codec); /* for sysfs */





	codec->bus = bus;

	codec->bus = bus;

	codec->addr = codec_addr;

	codec->addr = codec_addr;
@@ -1587,92 +1400,6 @@ int snd_hda_codec_update_widgets(struct hda_codec *codec) 
}

}

EXPORT_SYMBOL_GPL(snd_hda_codec_update_widgets);

EXPORT_SYMBOL_GPL(snd_hda_codec_update_widgets);







#if IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI)

/* if all audio out widgets are digital, let's assume the codec as a HDMI/DP */

static bool is_likely_hdmi_codec(struct hda_codec *codec)

{

	hda_nid_t nid = codec->start_nid;

	int i;



	for (i = 0; i < codec->num_nodes; i++, nid++) {

		unsigned int wcaps = get_wcaps(codec, nid);

		switch (get_wcaps_type(wcaps)) {

		case AC_WID_AUD_IN:

			return false; /* HDMI parser supports only HDMI out */

		case AC_WID_AUD_OUT:

			if (!(wcaps & AC_WCAP_DIGITAL))

				return false;

			break;

		}

	}

	return true;

}

#else

/* no HDMI codec parser support */

#define is_likely_hdmi_codec(codec)	false

#endif /* CONFIG_SND_HDA_CODEC_HDMI */



/**

 * snd_hda_codec_configure - (Re-)configure the HD-audio codec

 * @codec: the HDA codec

 *

 * Start parsing of the given codec tree and (re-)initialize the whole

 * patch instance.

 *

 * Returns 0 if successful or a negative error code.

 */

int snd_hda_codec_configure(struct hda_codec *codec)

{

	int (*patch)(struct hda_codec *) = NULL;

	int err;



	codec->preset = find_codec_preset(codec);

	if (!codec->vendor_name || !codec->chip_name) {

		err = get_codec_name(codec);

		if (err < 0)

			return err;

	}



	if (!is_generic_config(codec) && codec->preset)

		patch = codec->preset->patch;

	if (!patch) {

		unload_parser(codec); /* to be sure */

		if (is_likely_hdmi_codec(codec)) {

#if IS_MODULE(CONFIG_SND_HDA_CODEC_HDMI)

			patch = load_parser(codec, snd_hda_parse_hdmi_codec);

#elif IS_BUILTIN(CONFIG_SND_HDA_CODEC_HDMI)

			patch = snd_hda_parse_hdmi_codec;

#endif

		}

		if (!patch) {

#if IS_MODULE(CONFIG_SND_HDA_GENERIC)

			patch = load_parser(codec, snd_hda_parse_generic_codec);

#elif IS_BUILTIN(CONFIG_SND_HDA_GENERIC)

			patch = snd_hda_parse_generic_codec;

#endif

		}

		if (!patch) {

			codec_err(codec, "No codec parser is available\n");

			return -ENODEV;

		}

	}



	err = patch(codec);

	if (err < 0) {

		unload_parser(codec);

		return err;

	}



	/* audio codec should override the mixer name */

	if (codec->afg || !*codec->bus->card->mixername)

		snprintf(codec->bus->card->mixername,

			 sizeof(codec->bus->card->mixername),

			 "%s %s", codec->vendor_name, codec->chip_name);

	return 0;

}

EXPORT_SYMBOL_GPL(snd_hda_codec_configure);



/* update the stream-id if changed */

/* update the stream-id if changed */

static void update_pcm_stream_id(struct hda_codec *codec,

static void update_pcm_stream_id(struct hda_codec *codec,

				 struct hda_cvt_setup *p, hda_nid_t nid,

				 struct hda_cvt_setup *p, hda_nid_t nid,
@@ -2739,8 +2466,9 @@ int snd_hda_codec_reset(struct hda_codec *codec) 
		}

		}

	}

	}

	snd_hda_detach_beep_device(codec);

	snd_hda_detach_beep_device(codec);

	if (codec->patch_ops.free)

	if (device_is_registered(hda_codec_dev(codec)))

		codec->patch_ops.free(codec);

		device_del(hda_codec_dev(codec));



	memset(&codec->patch_ops, 0, sizeof(codec->patch_ops));

	memset(&codec->patch_ops, 0, sizeof(codec->patch_ops));

	snd_hda_jack_tbl_clear(codec);

	snd_hda_jack_tbl_clear(codec);

	codec->proc_widget_hook = NULL;

	codec->proc_widget_hook = NULL;
@@ -2759,9 +2487,6 @@ int snd_hda_codec_reset(struct hda_codec *codec) 
	codec->preset = NULL;

	codec->preset = NULL;

	codec->slave_dig_outs = NULL;

	codec->slave_dig_outs = NULL;

	codec->spdif_status_reset = 0;

	codec->spdif_status_reset = 0;

	unload_parser(codec);

	module_put(codec->owner);

	codec->owner = NULL;





	/* allow device access again */

	/* allow device access again */

	snd_hda_unlock_devices(bus);

	snd_hda_unlock_devices(bus);

sound/pci/hda/hda_codec.h

+19 −8
Original line number Original line Diff line number Diff line
@@ -174,15 +174,22 @@ struct hda_codec_preset { 
	int (*patch)(struct hda_codec *codec);

	int (*patch)(struct hda_codec *codec);

};

};

	

	

struct hda_codec_preset_list {

#define HDA_CODEC_ID_GENERIC_HDMI	0x00000101

#define HDA_CODEC_ID_GENERIC		0x00000201



struct hda_codec_driver {

	struct device_driver driver;

	const struct hda_codec_preset *preset;

	const struct hda_codec_preset *preset;

	struct module *owner;

	struct list_head list;

};

};





/* initial hook */

int __hda_codec_driver_register(struct hda_codec_driver *drv, const char *name,

int snd_hda_add_codec_preset(struct hda_codec_preset_list *preset);

			       struct module *owner);

int snd_hda_delete_codec_preset(struct hda_codec_preset_list *preset);

#define hda_codec_driver_register(drv) \

	__hda_codec_driver_register(drv, KBUILD_MODNAME, THIS_MODULE)

void hda_codec_driver_unregister(struct hda_codec_driver *drv);

#define module_hda_codec_driver(drv) \

	module_driver(drv, hda_codec_driver_register, \

		      hda_codec_driver_unregister)





/* ops set by the preset patch */

/* ops set by the preset patch */

struct hda_codec_ops {

struct hda_codec_ops {
@@ -286,11 +293,10 @@ struct hda_codec { 
	u32 vendor_id;

	u32 vendor_id;

	u32 subsystem_id;

	u32 subsystem_id;

	u32 revision_id;

	u32 revision_id;

	u32 probe_id; /* overridden id for probing */





	/* detected preset */

	/* detected preset */

	const struct hda_codec_preset *preset;

	const struct hda_codec_preset *preset;

	struct module *owner;

	int (*parser)(struct hda_codec *codec);

	const char *vendor_name;	/* codec vendor name */

	const char *vendor_name;	/* codec vendor name */

	const char *chip_name;		/* codec chip name */

	const char *chip_name;		/* codec chip name */

	const char *modelname;	/* model name for preset */

	const char *modelname;	/* model name for preset */
@@ -408,6 +414,11 @@ struct hda_codec { 
	struct snd_array verbs;

	struct snd_array verbs;

};

};





#define dev_to_hda_codec(_dev)	container_of(_dev, struct hda_codec, dev)

#define hda_codec_dev(_dev)	(&(_dev)->dev)



extern struct bus_type snd_hda_bus_type;



/* direction */

/* direction */

enum {

enum {

	HDA_INPUT, HDA_OUTPUT

	HDA_INPUT, HDA_OUTPUT

sound/pci/hda/hda_generic.c

+13 −5
Original line number Original line Diff line number Diff line
@@ -5493,13 +5493,11 @@ static const struct hda_codec_ops generic_patch_ops = { 
#endif

#endif

};

};





/**

/*

 * snd_hda_parse_generic_codec - Generic codec parser

 * snd_hda_parse_generic_codec - Generic codec parser

 * @codec: the HDA codec

 * @codec: the HDA codec

 *

 * This should be called from the HDA codec core.

 */

 */

int snd_hda_parse_generic_codec(struct hda_codec *codec)

static int snd_hda_parse_generic_codec(struct hda_codec *codec)

{

{

	struct hda_gen_spec *spec;

	struct hda_gen_spec *spec;

	int err;

	int err;
@@ -5525,7 +5523,17 @@ error: 
	snd_hda_gen_free(codec);

	snd_hda_gen_free(codec);

	return err;

	return err;

}

}

EXPORT_SYMBOL_GPL(snd_hda_parse_generic_codec);



static const struct hda_codec_preset snd_hda_preset_generic[] = {

	{ .id = HDA_CODEC_ID_GENERIC, .patch = snd_hda_parse_generic_codec },

	{} /* terminator */

};



static struct hda_codec_driver generic_driver = {

	.preset = snd_hda_preset_generic,

};



module_hda_codec_driver(generic_driver);





MODULE_LICENSE("GPL");

MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("Generic HD-audio codec parser");
 
MODULE_DESCRIPTION("Generic HD-audio codec parser");

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