Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1102 insertions, 0 deletions

diff --git a/sound/hda/hdac_device.c b/sound/hda/hdac_device.c
new file mode 100644
index 0000000000..bbf7bcdb44
--- /dev/null
+++ b/sound/hda/hdac_device.c
@@ -0,0 +1,1102 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * HD-audio codec core device
+ */
+
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/export.h>
+#include <linux/pm_runtime.h>
+#include <sound/hdaudio.h>
+#include <sound/hda_regmap.h>
+#include <sound/pcm.h>
+#include "local.h"
+
+static void setup_fg_nodes(struct hdac_device *codec);
+static int get_codec_vendor_name(struct hdac_device *codec);
+
+static void default_release(struct device *dev)
+{
+	snd_hdac_device_exit(dev_to_hdac_dev(dev));
+}
+
+/**
+ * snd_hdac_device_init - initialize the HD-audio codec base device
+ * @codec: device to initialize
+ * @bus: but to attach
+ * @name: device name string
+ * @addr: codec address
+ *
+ * Returns zero for success or a negative error code.
+ *
+ * This function increments the runtime PM counter and marks it active.
+ * The caller needs to turn it off appropriately later.
+ *
+ * The caller needs to set the device's release op properly by itself.
+ */
+int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus,
+			 const char *name, unsigned int addr)
+{
+	struct device *dev;
+	hda_nid_t fg;
+	int err;
+
+	dev = &codec->dev;
+	device_initialize(dev);
+	dev->parent = bus->dev;
+	dev->bus = &snd_hda_bus_type;
+	dev->release = default_release;
+	dev->groups = hdac_dev_attr_groups;
+	dev_set_name(dev, "%s", name);
+	device_enable_async_suspend(dev);
+
+	codec->bus = bus;
+	codec->addr = addr;
+	codec->type = HDA_DEV_CORE;
+	mutex_init(&codec->widget_lock);
+	mutex_init(&codec->regmap_lock);
+	pm_runtime_set_active(&codec->dev);
+	pm_runtime_get_noresume(&codec->dev);
+	atomic_set(&codec->in_pm, 0);
+
+	err = snd_hdac_bus_add_device(bus, codec);
+	if (err < 0)
+		goto error;
+
+	/* fill parameters */
+	codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
+					      AC_PAR_VENDOR_ID);
+	if (codec->vendor_id == -1) {
+		/* read again, hopefully the access method was corrected
+		 * in the last read...
+		 */
+		codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
+						      AC_PAR_VENDOR_ID);
+	}
+
+	codec->subsystem_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
+						 AC_PAR_SUBSYSTEM_ID);
+	codec->revision_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
+						AC_PAR_REV_ID);
+
+	setup_fg_nodes(codec);
+	if (!codec->afg && !codec->mfg) {
+		dev_err(dev, "no AFG or MFG node found\n");
+		err = -ENODEV;
+		goto error;
+	}
+
+	fg = codec->afg ? codec->afg : codec->mfg;
+
+	err = snd_hdac_refresh_widgets(codec);
+	if (err < 0)
+		goto error;
+
+	codec->power_caps = snd_hdac_read_parm(codec, fg, AC_PAR_POWER_STATE);
+	/* reread ssid if not set by parameter */
+	if (codec->subsystem_id == -1 || codec->subsystem_id == 0)
+		snd_hdac_read(codec, fg, AC_VERB_GET_SUBSYSTEM_ID, 0,
+			      &codec->subsystem_id);
+
+	err = get_codec_vendor_name(codec);
+	if (err < 0)
+		goto error;
+
+	codec->chip_name = kasprintf(GFP_KERNEL, "ID %x",
+				     codec->vendor_id & 0xffff);
+	if (!codec->chip_name) {
+		err = -ENOMEM;
+		goto error;
+	}
+
+	return 0;
+
+ error:
+	put_device(&codec->dev);
+	return err;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_device_init);
+
+/**
+ * snd_hdac_device_exit - clean up the HD-audio codec base device
+ * @codec: device to clean up
+ */
+void snd_hdac_device_exit(struct hdac_device *codec)
+{
+	pm_runtime_put_noidle(&codec->dev);
+	/* keep balance of runtime PM child_count in parent device */
+	pm_runtime_set_suspended(&codec->dev);
+	snd_hdac_bus_remove_device(codec->bus, codec);
+	kfree(codec->vendor_name);
+	kfree(codec->chip_name);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_device_exit);
+
+/**
+ * snd_hdac_device_register - register the hd-audio codec base device
+ * @codec: the device to register
+ */
+int snd_hdac_device_register(struct hdac_device *codec)
+{
+	int err;
+
+	err = device_add(&codec->dev);
+	if (err < 0)
+		return err;
+	mutex_lock(&codec->widget_lock);
+	err = hda_widget_sysfs_init(codec);
+	mutex_unlock(&codec->widget_lock);
+	if (err < 0) {
+		device_del(&codec->dev);
+		return err;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_device_register);
+
+/**
+ * snd_hdac_device_unregister - unregister the hd-audio codec base device
+ * @codec: the device to unregister
+ */
+void snd_hdac_device_unregister(struct hdac_device *codec)
+{
+	if (device_is_registered(&codec->dev)) {
+		mutex_lock(&codec->widget_lock);
+		hda_widget_sysfs_exit(codec);
+		mutex_unlock(&codec->widget_lock);
+		device_del(&codec->dev);
+		snd_hdac_bus_remove_device(codec->bus, codec);
+	}
+}
+EXPORT_SYMBOL_GPL(snd_hdac_device_unregister);
+
+/**
+ * snd_hdac_device_set_chip_name - set/update the codec name
+ * @codec: the HDAC device
+ * @name: name string to set
+ *
+ * Returns 0 if the name is set or updated, or a negative error code.
+ */
+int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name)
+{
+	char *newname;
+
+	if (!name)
+		return 0;
+	newname = kstrdup(name, GFP_KERNEL);
+	if (!newname)
+		return -ENOMEM;
+	kfree(codec->chip_name);
+	codec->chip_name = newname;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_device_set_chip_name);
+
+/**
+ * snd_hdac_codec_modalias - give the module alias name
+ * @codec: HDAC device
+ * @buf: string buffer to store
+ * @size: string buffer size
+ *
+ * Returns the size of string, like snprintf(), or a negative error code.
+ */
+int snd_hdac_codec_modalias(const struct hdac_device *codec, char *buf, size_t size)
+{
+	return scnprintf(buf, size, "hdaudio:v%08Xr%08Xa%02X\n",
+			codec->vendor_id, codec->revision_id, codec->type);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_codec_modalias);
+
+/**
+ * snd_hdac_make_cmd - compose a 32bit command word to be sent to the
+ *	HD-audio controller
+ * @codec: the codec object
+ * @nid: NID to encode
+ * @verb: verb to encode
+ * @parm: parameter to encode
+ *
+ * Return an encoded command verb or -1 for error.
+ */
+static unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
+				      unsigned int verb, unsigned int parm)
+{
+	u32 val, addr;
+
+	addr = codec->addr;
+	if ((addr & ~0xf) || (nid & ~0x7f) ||
+	    (verb & ~0xfff) || (parm & ~0xffff)) {
+		dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n",
+			addr, nid, verb, parm);
+		return -1;
+	}
+
+	val = addr << 28;
+	val |= (u32)nid << 20;
+	val |= verb << 8;
+	val |= parm;
+	return val;
+}
+
+/**
+ * snd_hdac_exec_verb - execute an encoded verb
+ * @codec: the codec object
+ * @cmd: encoded verb to execute
+ * @flags: optional flags, pass zero for default
+ * @res: the pointer to store the result, NULL if running async
+ *
+ * Returns zero if successful, or a negative error code.
+ *
+ * This calls the exec_verb op when set in hdac_codec.  If not,
+ * call the default snd_hdac_bus_exec_verb().
+ */
+int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
+		       unsigned int flags, unsigned int *res)
+{
+	if (codec->exec_verb)
+		return codec->exec_verb(codec, cmd, flags, res);
+	return snd_hdac_bus_exec_verb(codec->bus, codec->addr, cmd, res);
+}
+
+
+/**
+ * snd_hdac_read - execute a verb
+ * @codec: the codec object
+ * @nid: NID to execute a verb
+ * @verb: verb to execute
+ * @parm: parameter for a verb
+ * @res: the pointer to store the result, NULL if running async
+ *
+ * Returns zero if successful, or a negative error code.
+ */
+int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
+		  unsigned int verb, unsigned int parm, unsigned int *res)
+{
+	unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm);
+
+	return snd_hdac_exec_verb(codec, cmd, 0, res);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_read);
+
+/**
+ * _snd_hdac_read_parm - read a parmeter
+ * @codec: the codec object
+ * @nid: NID to read a parameter
+ * @parm: parameter to read
+ * @res: pointer to store the read value
+ *
+ * This function returns zero or an error unlike snd_hdac_read_parm().
+ */
+int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
+			unsigned int *res)
+{
+	unsigned int cmd;
+
+	cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
+	return snd_hdac_regmap_read_raw(codec, cmd, res);
+}
+EXPORT_SYMBOL_GPL(_snd_hdac_read_parm);
+
+/**
+ * snd_hdac_read_parm_uncached - read a codec parameter without caching
+ * @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() directly.
+ */
+int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
+				int parm)
+{
+	unsigned int cmd, val;
+
+	cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
+	if (snd_hdac_regmap_read_raw_uncached(codec, cmd, &val) < 0)
+		return -1;
+	return val;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_read_parm_uncached);
+
+/**
+ * snd_hdac_override_parm - override read-only parameters
+ * @codec: the codec object
+ * @nid: NID for the parameter
+ * @parm: the parameter to change
+ * @val: the parameter value to overwrite
+ */
+int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
+			   unsigned int parm, unsigned int val)
+{
+	unsigned int verb = (AC_VERB_PARAMETERS << 8) | (nid << 20) | parm;
+	int err;
+
+	if (!codec->regmap)
+		return -EINVAL;
+
+	codec->caps_overwriting = true;
+	err = snd_hdac_regmap_write_raw(codec, verb, val);
+	codec->caps_overwriting = false;
+	return err;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_override_parm);
+
+/**
+ * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes
+ * @codec: the codec object
+ * @nid: NID to inspect
+ * @start_id: the pointer to store the starting NID
+ *
+ * Returns the number of subtree nodes or zero if not found.
+ * This function reads parameters always without caching.
+ */
+int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
+			   hda_nid_t *start_id)
+{
+	unsigned int parm;
+
+	parm = snd_hdac_read_parm_uncached(codec, nid, AC_PAR_NODE_COUNT);
+	if (parm == -1) {
+		*start_id = 0;
+		return 0;
+	}
+	*start_id = (parm >> 16) & 0x7fff;
+	return (int)(parm & 0x7fff);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes);
+
+/*
+ * look for an AFG and MFG nodes
+ */
+static void setup_fg_nodes(struct hdac_device *codec)
+{
+	int i, total_nodes, function_id;
+	hda_nid_t nid;
+
+	total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid);
+	for (i = 0; i < total_nodes; i++, nid++) {
+		function_id = snd_hdac_read_parm(codec, nid,
+						 AC_PAR_FUNCTION_TYPE);
+		switch (function_id & 0xff) {
+		case AC_GRP_AUDIO_FUNCTION:
+			codec->afg = nid;
+			codec->afg_function_id = function_id & 0xff;
+			codec->afg_unsol = (function_id >> 8) & 1;
+			break;
+		case AC_GRP_MODEM_FUNCTION:
+			codec->mfg = nid;
+			codec->mfg_function_id = function_id & 0xff;
+			codec->mfg_unsol = (function_id >> 8) & 1;
+			break;
+		default:
+			break;
+		}
+	}
+}
+
+/**
+ * snd_hdac_refresh_widgets - Reset the widget start/end nodes
+ * @codec: the codec object
+ */
+int snd_hdac_refresh_widgets(struct hdac_device *codec)
+{
+	hda_nid_t start_nid;
+	int nums, err = 0;
+
+	/*
+	 * Serialize against multiple threads trying to update the sysfs
+	 * widgets array.
+	 */
+	mutex_lock(&codec->widget_lock);
+	nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid);
+	if (!start_nid || nums <= 0 || nums >= 0xff) {
+		dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n",
+			codec->afg);
+		err = -EINVAL;
+		goto unlock;
+	}
+
+	err = hda_widget_sysfs_reinit(codec, start_nid, nums);
+	if (err < 0)
+		goto unlock;
+
+	codec->num_nodes = nums;
+	codec->start_nid = start_nid;
+	codec->end_nid = start_nid + nums;
+unlock:
+	mutex_unlock(&codec->widget_lock);
+	return err;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets);
+
+/* return CONNLIST_LEN parameter of the given widget */
+static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid)
+{
+	unsigned int wcaps = get_wcaps(codec, nid);
+	unsigned int parm;
+
+	if (!(wcaps & AC_WCAP_CONN_LIST) &&
+	    get_wcaps_type(wcaps) != AC_WID_VOL_KNB)
+		return 0;
+
+	parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN);
+	if (parm == -1)
+		parm = 0;
+	return parm;
+}
+
+/**
+ * snd_hdac_get_connections - get a widget connection list
+ * @codec: the codec object
+ * @nid: NID
+ * @conn_list: the array to store the results, can be NULL
+ * @max_conns: the max size of the given array
+ *
+ * Returns the number of connected widgets, zero for no connection, or a
+ * negative error code.  When the number of elements don't fit with the
+ * given array size, it returns -ENOSPC.
+ *
+ * When @conn_list is NULL, it just checks the number of connections.
+ */
+int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
+			     hda_nid_t *conn_list, int max_conns)
+{
+	unsigned int parm;
+	int i, conn_len, conns, err;
+	unsigned int shift, num_elems, mask;
+	hda_nid_t prev_nid;
+	int null_count = 0;
+
+	parm = get_num_conns(codec, nid);
+	if (!parm)
+		return 0;
+
+	if (parm & AC_CLIST_LONG) {
+		/* long form */
+		shift = 16;
+		num_elems = 2;
+	} else {
+		/* short form */
+		shift = 8;
+		num_elems = 4;
+	}
+	conn_len = parm & AC_CLIST_LENGTH;
+	mask = (1 << (shift-1)) - 1;
+
+	if (!conn_len)
+		return 0; /* no connection */
+
+	if (conn_len == 1) {
+		/* single connection */
+		err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0,
+				    &parm);
+		if (err < 0)
+			return err;
+		if (conn_list)
+			conn_list[0] = parm & mask;
+		return 1;
+	}
+
+	/* multi connection */
+	conns = 0;
+	prev_nid = 0;
+	for (i = 0; i < conn_len; i++) {
+		int range_val;
+		hda_nid_t val, n;
+
+		if (i % num_elems == 0) {
+			err = snd_hdac_read(codec, nid,
+					    AC_VERB_GET_CONNECT_LIST, i,
+					    &parm);
+			if (err < 0)
+				return -EIO;
+		}
+		range_val = !!(parm & (1 << (shift-1))); /* ranges */
+		val = parm & mask;
+		if (val == 0 && null_count++) {  /* no second chance */
+			dev_dbg(&codec->dev,
+				"invalid CONNECT_LIST verb %x[%i]:%x\n",
+				nid, i, parm);
+			return 0;
+		}
+		parm >>= shift;
+		if (range_val) {
+			/* ranges between the previous and this one */
+			if (!prev_nid || prev_nid >= val) {
+				dev_warn(&codec->dev,
+					 "invalid dep_range_val %x:%x\n",
+					 prev_nid, val);
+				continue;
+			}
+			for (n = prev_nid + 1; n <= val; n++) {
+				if (conn_list) {
+					if (conns >= max_conns)
+						return -ENOSPC;
+					conn_list[conns] = n;
+				}
+				conns++;
+			}
+		} else {
+			if (conn_list) {
+				if (conns >= max_conns)
+					return -ENOSPC;
+				conn_list[conns] = val;
+			}
+			conns++;
+		}
+		prev_nid = val;
+	}
+	return conns;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_get_connections);
+
+#ifdef CONFIG_PM
+/**
+ * snd_hdac_power_up - power up the codec
+ * @codec: the codec object
+ *
+ * This function calls the runtime PM helper to power up the given codec.
+ * Unlike snd_hdac_power_up_pm(), you should call this only for the code
+ * path that isn't included in PM path.  Otherwise it gets stuck.
+ *
+ * Returns zero if successful, or a negative error code.
+ */
+int snd_hdac_power_up(struct hdac_device *codec)
+{
+	return pm_runtime_get_sync(&codec->dev);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_power_up);
+
+/**
+ * snd_hdac_power_down - power down the codec
+ * @codec: the codec object
+ *
+ * Returns zero if successful, or a negative error code.
+ */
+int snd_hdac_power_down(struct hdac_device *codec)
+{
+	struct device *dev = &codec->dev;
+
+	pm_runtime_mark_last_busy(dev);
+	return pm_runtime_put_autosuspend(dev);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_power_down);
+
+/**
+ * snd_hdac_power_up_pm - power up the codec
+ * @codec: the codec object
+ *
+ * This function can be called in a recursive code path like init code
+ * which may be called by PM suspend/resume again.  OTOH, if a power-up
+ * call must wake up the sleeper (e.g. in a kctl callback), use
+ * snd_hdac_power_up() instead.
+ *
+ * Returns zero if successful, or a negative error code.
+ */
+int snd_hdac_power_up_pm(struct hdac_device *codec)
+{
+	if (!atomic_inc_not_zero(&codec->in_pm))
+		return snd_hdac_power_up(codec);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm);
+
+/* like snd_hdac_power_up_pm(), but only increment the pm count when
+ * already powered up.  Returns -1 if not powered up, 1 if incremented
+ * or 0 if unchanged.  Only used in hdac_regmap.c
+ */
+int snd_hdac_keep_power_up(struct hdac_device *codec)
+{
+	if (!atomic_inc_not_zero(&codec->in_pm)) {
+		int ret = pm_runtime_get_if_active(&codec->dev, true);
+		if (!ret)
+			return -1;
+		if (ret < 0)
+			return 0;
+	}
+	return 1;
+}
+
+/**
+ * snd_hdac_power_down_pm - power down the codec
+ * @codec: the codec object
+ *
+ * Like snd_hdac_power_up_pm(), this function is used in a recursive
+ * code path like init code which may be called by PM suspend/resume again.
+ *
+ * Returns zero if successful, or a negative error code.
+ */
+int snd_hdac_power_down_pm(struct hdac_device *codec)
+{
+	if (atomic_dec_if_positive(&codec->in_pm) < 0)
+		return snd_hdac_power_down(codec);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm);
+#endif
+
+/* codec vendor labels */
+struct hda_vendor_id {
+	unsigned int id;
+	const char *name;
+};
+
+static const struct hda_vendor_id hda_vendor_ids[] = {
+	{ 0x0014, "Loongson" },
+	{ 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" },
+	{ 0x19e5, "Huawei" },
+	{ 0x1aec, "Wolfson Microelectronics" },
+	{ 0x1af4, "QEMU" },
+	{ 0x434d, "C-Media" },
+	{ 0x8086, "Intel" },
+	{ 0x8384, "SigmaTel" },
+	{} /* terminator */
+};
+
+/* store the codec vendor name */
+static int get_codec_vendor_name(struct hdac_device *codec)
+{
+	const struct hda_vendor_id *c;
+	u16 vendor_id = codec->vendor_id >> 16;
+
+	for (c = hda_vendor_ids; c->id; c++) {
+		if (c->id == vendor_id) {
+			codec->vendor_name = kstrdup(c->name, GFP_KERNEL);
+			return codec->vendor_name ? 0 : -ENOMEM;
+		}
+	}
+
+	codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id);
+	return codec->vendor_name ? 0 : -ENOMEM;
+}
+
+/*
+ * stream formats
+ */
+struct hda_rate_tbl {
+	unsigned int hz;
+	unsigned int alsa_bits;
+	unsigned int hda_fmt;
+};
+
+/* rate = base * mult / div */
+#define HDA_RATE(base, mult, div) \
+	(AC_FMT_BASE_##base##K | (((mult) - 1) << AC_FMT_MULT_SHIFT) | \
+	 (((div) - 1) << AC_FMT_DIV_SHIFT))
+
+static const struct hda_rate_tbl rate_bits[] = {
+	/* rate in Hz, ALSA rate bitmask, HDA format value */
+
+	/* autodetected value used in snd_hda_query_supported_pcm */
+	{ 8000, SNDRV_PCM_RATE_8000, HDA_RATE(48, 1, 6) },
+	{ 11025, SNDRV_PCM_RATE_11025, HDA_RATE(44, 1, 4) },
+	{ 16000, SNDRV_PCM_RATE_16000, HDA_RATE(48, 1, 3) },
+	{ 22050, SNDRV_PCM_RATE_22050, HDA_RATE(44, 1, 2) },
+	{ 32000, SNDRV_PCM_RATE_32000, HDA_RATE(48, 2, 3) },
+	{ 44100, SNDRV_PCM_RATE_44100, HDA_RATE(44, 1, 1) },
+	{ 48000, SNDRV_PCM_RATE_48000, HDA_RATE(48, 1, 1) },
+	{ 88200, SNDRV_PCM_RATE_88200, HDA_RATE(44, 2, 1) },
+	{ 96000, SNDRV_PCM_RATE_96000, HDA_RATE(48, 2, 1) },
+	{ 176400, SNDRV_PCM_RATE_176400, HDA_RATE(44, 4, 1) },
+	{ 192000, SNDRV_PCM_RATE_192000, HDA_RATE(48, 4, 1) },
+#define AC_PAR_PCM_RATE_BITS	11
+	/* up to bits 10, 384kHZ isn't supported properly */
+
+	/* not autodetected value */
+	{ 9600, SNDRV_PCM_RATE_KNOT, HDA_RATE(48, 1, 5) },
+
+	{ 0 } /* terminator */
+};
+
+/**
+ * snd_hdac_calc_stream_format - calculate the format bitset
+ * @rate: the sample rate
+ * @channels: the number of channels
+ * @format: the PCM format (SNDRV_PCM_FORMAT_XXX)
+ * @maxbps: the max. bps
+ * @spdif_ctls: HD-audio SPDIF status bits (0 if irrelevant)
+ *
+ * Calculate the format bitset from the given rate, channels and th PCM format.
+ *
+ * Return zero if invalid.
+ */
+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 i;
+	unsigned int val = 0;
+
+	for (i = 0; rate_bits[i].hz; i++)
+		if (rate_bits[i].hz == rate) {
+			val = rate_bits[i].hda_fmt;
+			break;
+		}
+	if (!rate_bits[i].hz)
+		return 0;
+
+	if (channels == 0 || channels > 8)
+		return 0;
+	val |= channels - 1;
+
+	switch (snd_pcm_format_width(format)) {
+	case 8:
+		val |= AC_FMT_BITS_8;
+		break;
+	case 16:
+		val |= AC_FMT_BITS_16;
+		break;
+	case 20:
+	case 24:
+	case 32:
+		if (maxbps >= 32 || format == SNDRV_PCM_FORMAT_FLOAT_LE)
+			val |= AC_FMT_BITS_32;
+		else if (maxbps >= 24)
+			val |= AC_FMT_BITS_24;
+		else
+			val |= AC_FMT_BITS_20;
+		break;
+	default:
+		return 0;
+	}
+
+	if (spdif_ctls & AC_DIG1_NONAUDIO)
+		val |= AC_FMT_TYPE_NON_PCM;
+
+	return val;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_calc_stream_format);
+
+static unsigned int query_pcm_param(struct hdac_device *codec, hda_nid_t nid)
+{
+	unsigned int val = 0;
+
+	if (nid != codec->afg &&
+	    (get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD))
+		val = snd_hdac_read_parm(codec, nid, AC_PAR_PCM);
+	if (!val || val == -1)
+		val = snd_hdac_read_parm(codec, codec->afg, AC_PAR_PCM);
+	if (!val || val == -1)
+		return 0;
+	return val;
+}
+
+static unsigned int query_stream_param(struct hdac_device *codec, hda_nid_t nid)
+{
+	unsigned int streams = snd_hdac_read_parm(codec, nid, AC_PAR_STREAM);
+
+	if (!streams || streams == -1)
+		streams = snd_hdac_read_parm(codec, codec->afg, AC_PAR_STREAM);
+	if (!streams || streams == -1)
+		return 0;
+	return streams;
+}
+
+/**
+ * snd_hdac_query_supported_pcm - query the supported PCM rates and formats
+ * @codec: the codec object
+ * @nid: NID to query
+ * @ratesp: the pointer to store the detected rate bitflags
+ * @formatsp: the pointer to store the detected formats
+ * @bpsp: the pointer to store the detected format widths
+ *
+ * Queries the supported PCM rates and formats.  The NULL @ratesp, @formatsp
+ * or @bsps argument is ignored.
+ *
+ * Returns 0 if successful, otherwise a negative error code.
+ */
+int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
+				 u32 *ratesp, u64 *formatsp, unsigned int *bpsp)
+{
+	unsigned int i, val, wcaps;
+
+	wcaps = get_wcaps(codec, nid);
+	val = query_pcm_param(codec, nid);
+
+	if (ratesp) {
+		u32 rates = 0;
+		for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) {
+			if (val & (1 << i))
+				rates |= rate_bits[i].alsa_bits;
+		}
+		if (rates == 0) {
+			dev_err(&codec->dev,
+				"rates == 0 (nid=0x%x, val=0x%x, ovrd=%i)\n",
+				nid, val,
+				(wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0);
+			return -EIO;
+		}
+		*ratesp = rates;
+	}
+
+	if (formatsp || bpsp) {
+		u64 formats = 0;
+		unsigned int streams, bps;
+
+		streams = query_stream_param(codec, nid);
+		if (!streams)
+			return -EIO;
+
+		bps = 0;
+		if (streams & AC_SUPFMT_PCM) {
+			if (val & AC_SUPPCM_BITS_8) {
+				formats |= SNDRV_PCM_FMTBIT_U8;
+				bps = 8;
+			}
+			if (val & AC_SUPPCM_BITS_16) {
+				formats |= SNDRV_PCM_FMTBIT_S16_LE;
+				bps = 16;
+			}
+			if (wcaps & AC_WCAP_DIGITAL) {
+				if (val & AC_SUPPCM_BITS_32)
+					formats |= SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE;
+				if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24))
+					formats |= SNDRV_PCM_FMTBIT_S32_LE;
+				if (val & AC_SUPPCM_BITS_24)
+					bps = 24;
+				else if (val & AC_SUPPCM_BITS_20)
+					bps = 20;
+			} else if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24|
+					  AC_SUPPCM_BITS_32)) {
+				formats |= SNDRV_PCM_FMTBIT_S32_LE;
+				if (val & AC_SUPPCM_BITS_32)
+					bps = 32;
+				else if (val & AC_SUPPCM_BITS_24)
+					bps = 24;
+				else if (val & AC_SUPPCM_BITS_20)
+					bps = 20;
+			}
+		}
+#if 0 /* FIXME: CS4206 doesn't work, which is the only codec supporting float */
+		if (streams & AC_SUPFMT_FLOAT32) {
+			formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
+			if (!bps)
+				bps = 32;
+		}
+#endif
+		if (streams == AC_SUPFMT_AC3) {
+			/* should be exclusive */
+			/* temporary hack: we have still no proper support
+			 * for the direct AC3 stream...
+			 */
+			formats |= SNDRV_PCM_FMTBIT_U8;
+			bps = 8;
+		}
+		if (formats == 0) {
+			dev_err(&codec->dev,
+				"formats == 0 (nid=0x%x, val=0x%x, ovrd=%i, streams=0x%x)\n",
+				nid, val,
+				(wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0,
+				streams);
+			return -EIO;
+		}
+		if (formatsp)
+			*formatsp = formats;
+		if (bpsp)
+			*bpsp = bps;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_query_supported_pcm);
+
+/**
+ * snd_hdac_is_supported_format - Check the validity of the format
+ * @codec: the codec object
+ * @nid: NID to check
+ * @format: the HD-audio format value to check
+ *
+ * Check whether the given node supports the format value.
+ *
+ * Returns true if supported, false if not.
+ */
+bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
+				  unsigned int format)
+{
+	int i;
+	unsigned int val = 0, rate, stream;
+
+	val = query_pcm_param(codec, nid);
+	if (!val)
+		return false;
+
+	rate = format & 0xff00;
+	for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++)
+		if (rate_bits[i].hda_fmt == rate) {
+			if (val & (1 << i))
+				break;
+			return false;
+		}
+	if (i >= AC_PAR_PCM_RATE_BITS)
+		return false;
+
+	stream = query_stream_param(codec, nid);
+	if (!stream)
+		return false;
+
+	if (stream & AC_SUPFMT_PCM) {
+		switch (format & 0xf0) {
+		case 0x00:
+			if (!(val & AC_SUPPCM_BITS_8))
+				return false;
+			break;
+		case 0x10:
+			if (!(val & AC_SUPPCM_BITS_16))
+				return false;
+			break;
+		case 0x20:
+			if (!(val & AC_SUPPCM_BITS_20))
+				return false;
+			break;
+		case 0x30:
+			if (!(val & AC_SUPPCM_BITS_24))
+				return false;
+			break;
+		case 0x40:
+			if (!(val & AC_SUPPCM_BITS_32))
+				return false;
+			break;
+		default:
+			return false;
+		}
+	} else {
+		/* FIXME: check for float32 and AC3? */
+	}
+
+	return true;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_is_supported_format);
+
+static unsigned int codec_read(struct hdac_device *hdac, hda_nid_t nid,
+			int flags, unsigned int verb, unsigned int parm)
+{
+	unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
+	unsigned int res;
+
+	if (snd_hdac_exec_verb(hdac, cmd, flags, &res))
+		return -1;
+
+	return res;
+}
+
+static int codec_write(struct hdac_device *hdac, hda_nid_t nid,
+			int flags, unsigned int verb, unsigned int parm)
+{
+	unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
+
+	return snd_hdac_exec_verb(hdac, cmd, flags, NULL);
+}
+
+/**
+ * snd_hdac_codec_read - send a command and get the response
+ * @hdac: the HDAC device
+ * @nid: NID to send the command
+ * @flags: optional bit flags
+ * @verb: the verb to send
+ * @parm: the parameter for the verb
+ *
+ * Send a single command and read the corresponding response.
+ *
+ * Returns the obtained response value, or -1 for an error.
+ */
+int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
+			int flags, unsigned int verb, unsigned int parm)
+{
+	return codec_read(hdac, nid, flags, verb, parm);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_codec_read);
+
+/**
+ * snd_hdac_codec_write - send a single command without waiting for response
+ * @hdac: the HDAC device
+ * @nid: NID to send the command
+ * @flags: optional bit flags
+ * @verb: the verb to send
+ * @parm: the parameter for the verb
+ *
+ * Send a single command without waiting for response.
+ *
+ * Returns 0 if successful, or a negative error code.
+ */
+int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
+			int flags, unsigned int verb, unsigned int parm)
+{
+	return codec_write(hdac, nid, flags, verb, parm);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_codec_write);
+
+/**
+ * snd_hdac_check_power_state - check whether the actual power state matches
+ * with the target state
+ *
+ * @hdac: the HDAC device
+ * @nid: NID to send the command
+ * @target_state: target state to check for
+ *
+ * Return true if state matches, false if not
+ */
+bool snd_hdac_check_power_state(struct hdac_device *hdac,
+		hda_nid_t nid, unsigned int target_state)
+{
+	unsigned int state = codec_read(hdac, nid, 0,
+				AC_VERB_GET_POWER_STATE, 0);
+
+	if (state & AC_PWRST_ERROR)
+		return true;
+	state = (state >> 4) & 0x0f;
+	return (state == target_state);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_check_power_state);
+/**
+ * snd_hdac_sync_power_state - wait until actual power state matches
+ * with the target state
+ *
+ * @codec: the HDAC device
+ * @nid: NID to send the command
+ * @power_state: target power state to wait for
+ *
+ * Return power state or PS_ERROR if codec rejects GET verb.
+ */
+unsigned int snd_hdac_sync_power_state(struct hdac_device *codec,
+			hda_nid_t nid, unsigned int power_state)
+{
+	unsigned long end_time = jiffies + msecs_to_jiffies(500);
+	unsigned int state, actual_state, count;
+
+	for (count = 0; count < 500; count++) {
+		state = snd_hdac_codec_read(codec, nid, 0,
+				AC_VERB_GET_POWER_STATE, 0);
+		if (state & AC_PWRST_ERROR) {
+			msleep(20);
+			break;
+		}
+		actual_state = (state >> 4) & 0x0f;
+		if (actual_state == power_state)
+			break;
+		if (time_after_eq(jiffies, end_time))
+			break;
+		/* wait until the codec reachs to the target state */
+		msleep(1);
+	}
+	return state;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_sync_power_state);