2 * HD-audio codec core device
5 #include <linux/init.h>
6 #include <linux/device.h>
7 #include <linux/slab.h>
8 #include <linux/module.h>
9 #include <linux/export.h>
10 #include <linux/pm_runtime.h>
11 #include <sound/hdaudio.h>
12 #include <sound/hda_regmap.h>
13 #include <sound/pcm.h>
16 static void setup_fg_nodes(struct hdac_device *codec);
17 static int get_codec_vendor_name(struct hdac_device *codec);
19 static void default_release(struct device *dev)
21 snd_hdac_device_exit(container_of(dev, struct hdac_device, dev));
25 * snd_hdac_device_init - initialize the HD-audio codec base device
26 * @codec: device to initialize
28 * @name: device name string
29 * @addr: codec address
31 * Returns zero for success or a negative error code.
33 * This function increments the runtime PM counter and marks it active.
34 * The caller needs to turn it off appropriately later.
36 * The caller needs to set the device's release op properly by itself.
38 int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus,
39 const char *name, unsigned int addr)
46 device_initialize(dev);
47 dev->parent = bus->dev;
48 dev->bus = &snd_hda_bus_type;
49 dev->release = default_release;
50 dev->groups = hdac_dev_attr_groups;
51 dev_set_name(dev, "%s", name);
52 device_enable_async_suspend(dev);
56 codec->type = HDA_DEV_CORE;
57 pm_runtime_set_active(&codec->dev);
58 pm_runtime_get_noresume(&codec->dev);
59 atomic_set(&codec->in_pm, 0);
61 err = snd_hdac_bus_add_device(bus, codec);
66 codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
68 if (codec->vendor_id == -1) {
69 /* read again, hopefully the access method was corrected
72 codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
76 codec->subsystem_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
78 codec->revision_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
81 setup_fg_nodes(codec);
82 if (!codec->afg && !codec->mfg) {
83 dev_err(dev, "no AFG or MFG node found\n");
88 fg = codec->afg ? codec->afg : codec->mfg;
90 err = snd_hdac_refresh_widgets(codec);
94 codec->power_caps = snd_hdac_read_parm(codec, fg, AC_PAR_POWER_STATE);
95 /* reread ssid if not set by parameter */
96 if (codec->subsystem_id == -1 || codec->subsystem_id == 0)
97 snd_hdac_read(codec, fg, AC_VERB_GET_SUBSYSTEM_ID, 0,
98 &codec->subsystem_id);
100 err = get_codec_vendor_name(codec);
104 codec->chip_name = kasprintf(GFP_KERNEL, "ID %x",
105 codec->vendor_id & 0xffff);
106 if (!codec->chip_name) {
114 put_device(&codec->dev);
117 EXPORT_SYMBOL_GPL(snd_hdac_device_init);
120 * snd_hdac_device_exit - clean up the HD-audio codec base device
121 * @codec: device to clean up
123 void snd_hdac_device_exit(struct hdac_device *codec)
125 pm_runtime_put_noidle(&codec->dev);
126 snd_hdac_bus_remove_device(codec->bus, codec);
127 kfree(codec->vendor_name);
128 kfree(codec->chip_name);
130 EXPORT_SYMBOL_GPL(snd_hdac_device_exit);
133 * snd_hdac_device_register - register the hd-audio codec base device
134 * codec: the device to register
136 int snd_hdac_device_register(struct hdac_device *codec)
140 err = device_add(&codec->dev);
143 err = hda_widget_sysfs_init(codec);
145 device_del(&codec->dev);
151 EXPORT_SYMBOL_GPL(snd_hdac_device_register);
154 * snd_hdac_device_unregister - unregister the hd-audio codec base device
155 * codec: the device to unregister
157 void snd_hdac_device_unregister(struct hdac_device *codec)
159 if (device_is_registered(&codec->dev)) {
160 hda_widget_sysfs_exit(codec);
161 device_del(&codec->dev);
164 EXPORT_SYMBOL_GPL(snd_hdac_device_unregister);
167 * snd_hdac_make_cmd - compose a 32bit command word to be sent to the
168 * HD-audio controller
169 * @codec: the codec object
170 * @nid: NID to encode
171 * @verb: verb to encode
172 * @parm: parameter to encode
174 * Return an encoded command verb or -1 for error.
176 unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
177 unsigned int verb, unsigned int parm)
182 if ((addr & ~0xf) || (nid & ~0x7f) ||
183 (verb & ~0xfff) || (parm & ~0xffff)) {
184 dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n",
185 addr, nid, verb, parm);
190 val |= (u32)nid << 20;
195 EXPORT_SYMBOL_GPL(snd_hdac_make_cmd);
198 * snd_hdac_exec_verb - execute an encoded verb
199 * @codec: the codec object
200 * @cmd: encoded verb to execute
201 * @flags: optional flags, pass zero for default
202 * @res: the pointer to store the result, NULL if running async
204 * Returns zero if successful, or a negative error code.
206 * This calls the exec_verb op when set in hdac_codec. If not,
207 * call the default snd_hdac_bus_exec_verb().
209 int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
210 unsigned int flags, unsigned int *res)
212 if (codec->exec_verb)
213 return codec->exec_verb(codec, cmd, flags, res);
214 return snd_hdac_bus_exec_verb(codec->bus, codec->addr, cmd, res);
216 EXPORT_SYMBOL_GPL(snd_hdac_exec_verb);
220 * snd_hdac_read - execute a verb
221 * @codec: the codec object
222 * @nid: NID to execute a verb
223 * @verb: verb to execute
224 * @parm: parameter for a verb
225 * @res: the pointer to store the result, NULL if running async
227 * Returns zero if successful, or a negative error code.
229 int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
230 unsigned int verb, unsigned int parm, unsigned int *res)
232 unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm);
234 return snd_hdac_exec_verb(codec, cmd, 0, res);
236 EXPORT_SYMBOL_GPL(snd_hdac_read);
239 * _snd_hdac_read_parm - read a parmeter
241 * This function returns zero or an error unlike snd_hdac_read_parm().
243 int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
248 cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
249 return snd_hdac_regmap_read_raw(codec, cmd, res);
251 EXPORT_SYMBOL_GPL(_snd_hdac_read_parm);
254 * snd_hdac_read_parm_uncached - read a codec parameter without caching
255 * @codec: the codec object
256 * @nid: NID to read a parameter
257 * @parm: parameter to read
259 * Returns -1 for error. If you need to distinguish the error more
260 * strictly, use snd_hdac_read() directly.
262 int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
268 regcache_cache_bypass(codec->regmap, true);
269 val = snd_hdac_read_parm(codec, nid, parm);
271 regcache_cache_bypass(codec->regmap, false);
274 EXPORT_SYMBOL_GPL(snd_hdac_read_parm_uncached);
277 * snd_hdac_override_parm - override read-only parameters
278 * @codec: the codec object
279 * @nid: NID for the parameter
280 * @parm: the parameter to change
281 * @val: the parameter value to overwrite
283 int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
284 unsigned int parm, unsigned int val)
286 unsigned int verb = (AC_VERB_PARAMETERS << 8) | (nid << 20) | parm;
292 codec->caps_overwriting = true;
293 err = snd_hdac_regmap_write_raw(codec, verb, val);
294 codec->caps_overwriting = false;
297 EXPORT_SYMBOL_GPL(snd_hdac_override_parm);
300 * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes
301 * @codec: the codec object
302 * @nid: NID to inspect
303 * @start_id: the pointer to store the starting NID
305 * Returns the number of subtree nodes or zero if not found.
306 * This function reads parameters always without caching.
308 int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
313 parm = snd_hdac_read_parm_uncached(codec, nid, AC_PAR_NODE_COUNT);
318 *start_id = (parm >> 16) & 0x7fff;
319 return (int)(parm & 0x7fff);
321 EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes);
324 * look for an AFG and MFG nodes
326 static void setup_fg_nodes(struct hdac_device *codec)
328 int i, total_nodes, function_id;
331 total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid);
332 for (i = 0; i < total_nodes; i++, nid++) {
333 function_id = snd_hdac_read_parm(codec, nid,
334 AC_PAR_FUNCTION_TYPE);
335 switch (function_id & 0xff) {
336 case AC_GRP_AUDIO_FUNCTION:
338 codec->afg_function_id = function_id & 0xff;
339 codec->afg_unsol = (function_id >> 8) & 1;
341 case AC_GRP_MODEM_FUNCTION:
343 codec->mfg_function_id = function_id & 0xff;
344 codec->mfg_unsol = (function_id >> 8) & 1;
353 * snd_hdac_refresh_widgets - Reset the widget start/end nodes
354 * @codec: the codec object
356 int snd_hdac_refresh_widgets(struct hdac_device *codec)
361 nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid);
362 if (!start_nid || nums <= 0 || nums >= 0xff) {
363 dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n",
368 codec->num_nodes = nums;
369 codec->start_nid = start_nid;
370 codec->end_nid = start_nid + nums;
373 EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets);
376 * snd_hdac_refresh_widget_sysfs - Reset the codec widgets and reinit the
378 * @codec: the codec object
380 * first we need to remove sysfs, then refresh widgets and lastly
383 int snd_hdac_refresh_widget_sysfs(struct hdac_device *codec)
387 hda_widget_sysfs_exit(codec);
388 ret = snd_hdac_refresh_widgets(codec);
390 dev_err(&codec->dev, "failed to refresh widget: %d\n", ret);
393 ret = hda_widget_sysfs_init(codec);
395 dev_err(&codec->dev, "failed to init sysfs: %d\n", ret);
401 EXPORT_SYMBOL_GPL(snd_hdac_refresh_widget_sysfs);
403 /* return CONNLIST_LEN parameter of the given widget */
404 static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid)
406 unsigned int wcaps = get_wcaps(codec, nid);
409 if (!(wcaps & AC_WCAP_CONN_LIST) &&
410 get_wcaps_type(wcaps) != AC_WID_VOL_KNB)
413 parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN);
420 * snd_hdac_get_connections - get a widget connection list
421 * @codec: the codec object
423 * @conn_list: the array to store the results, can be NULL
424 * @max_conns: the max size of the given array
426 * Returns the number of connected widgets, zero for no connection, or a
427 * negative error code. When the number of elements don't fit with the
428 * given array size, it returns -ENOSPC.
430 * When @conn_list is NULL, it just checks the number of connections.
432 int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
433 hda_nid_t *conn_list, int max_conns)
436 int i, conn_len, conns, err;
437 unsigned int shift, num_elems, mask;
441 parm = get_num_conns(codec, nid);
445 if (parm & AC_CLIST_LONG) {
454 conn_len = parm & AC_CLIST_LENGTH;
455 mask = (1 << (shift-1)) - 1;
458 return 0; /* no connection */
461 /* single connection */
462 err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0,
467 conn_list[0] = parm & mask;
471 /* multi connection */
474 for (i = 0; i < conn_len; i++) {
478 if (i % num_elems == 0) {
479 err = snd_hdac_read(codec, nid,
480 AC_VERB_GET_CONNECT_LIST, i,
485 range_val = !!(parm & (1 << (shift-1))); /* ranges */
487 if (val == 0 && null_count++) { /* no second chance */
489 "invalid CONNECT_LIST verb %x[%i]:%x\n",
495 /* ranges between the previous and this one */
496 if (!prev_nid || prev_nid >= val) {
497 dev_warn(&codec->dev,
498 "invalid dep_range_val %x:%x\n",
502 for (n = prev_nid + 1; n <= val; n++) {
504 if (conns >= max_conns)
506 conn_list[conns] = n;
512 if (conns >= max_conns)
514 conn_list[conns] = val;
522 EXPORT_SYMBOL_GPL(snd_hdac_get_connections);
526 * snd_hdac_power_up - power up the codec
527 * @codec: the codec object
529 * This function calls the runtime PM helper to power up the given codec.
530 * Unlike snd_hdac_power_up_pm(), you should call this only for the code
531 * path that isn't included in PM path. Otherwise it gets stuck.
533 * Returns zero if successful, or a negative error code.
535 int snd_hdac_power_up(struct hdac_device *codec)
537 return pm_runtime_get_sync(&codec->dev);
539 EXPORT_SYMBOL_GPL(snd_hdac_power_up);
542 * snd_hdac_power_down - power down the codec
543 * @codec: the codec object
545 * Returns zero if successful, or a negative error code.
547 int snd_hdac_power_down(struct hdac_device *codec)
549 struct device *dev = &codec->dev;
551 pm_runtime_mark_last_busy(dev);
552 return pm_runtime_put_autosuspend(dev);
554 EXPORT_SYMBOL_GPL(snd_hdac_power_down);
557 * snd_hdac_power_up_pm - power up the codec
558 * @codec: the codec object
560 * This function can be called in a recursive code path like init code
561 * which may be called by PM suspend/resume again. OTOH, if a power-up
562 * call must wake up the sleeper (e.g. in a kctl callback), use
563 * snd_hdac_power_up() instead.
565 * Returns zero if successful, or a negative error code.
567 int snd_hdac_power_up_pm(struct hdac_device *codec)
569 if (!atomic_inc_not_zero(&codec->in_pm))
570 return snd_hdac_power_up(codec);
573 EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm);
576 * snd_hdac_power_down_pm - power down the codec
577 * @codec: the codec object
579 * Like snd_hdac_power_up_pm(), this function is used in a recursive
580 * code path like init code which may be called by PM suspend/resume again.
582 * Returns zero if successful, or a negative error code.
584 int snd_hdac_power_down_pm(struct hdac_device *codec)
586 if (atomic_dec_if_positive(&codec->in_pm) < 0)
587 return snd_hdac_power_down(codec);
590 EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm);
594 * Enable/disable the link power for a codec.
596 int snd_hdac_link_power(struct hdac_device *codec, bool enable)
598 if (!codec->link_power_control)
601 if (codec->bus->ops->link_power)
602 return codec->bus->ops->link_power(codec->bus, enable);
606 EXPORT_SYMBOL_GPL(snd_hdac_link_power);
608 /* codec vendor labels */
609 struct hda_vendor_id {
614 static struct hda_vendor_id hda_vendor_ids[] = {
616 { 0x1013, "Cirrus Logic" },
617 { 0x1057, "Motorola" },
618 { 0x1095, "Silicon Image" },
619 { 0x10de, "Nvidia" },
620 { 0x10ec, "Realtek" },
621 { 0x1102, "Creative" },
625 { 0x11d4, "Analog Devices" },
626 { 0x13f6, "C-Media" },
627 { 0x14f1, "Conexant" },
628 { 0x17e8, "Chrontel" },
630 { 0x1aec, "Wolfson Microelectronics" },
632 { 0x434d, "C-Media" },
634 { 0x8384, "SigmaTel" },
638 /* store the codec vendor name */
639 static int get_codec_vendor_name(struct hdac_device *codec)
641 const struct hda_vendor_id *c;
642 u16 vendor_id = codec->vendor_id >> 16;
644 for (c = hda_vendor_ids; c->id; c++) {
645 if (c->id == vendor_id) {
646 codec->vendor_name = kstrdup(c->name, GFP_KERNEL);
647 return codec->vendor_name ? 0 : -ENOMEM;
651 codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id);
652 return codec->vendor_name ? 0 : -ENOMEM;
658 struct hda_rate_tbl {
660 unsigned int alsa_bits;
661 unsigned int hda_fmt;
664 /* rate = base * mult / div */
665 #define HDA_RATE(base, mult, div) \
666 (AC_FMT_BASE_##base##K | (((mult) - 1) << AC_FMT_MULT_SHIFT) | \
667 (((div) - 1) << AC_FMT_DIV_SHIFT))
669 static struct hda_rate_tbl rate_bits[] = {
670 /* rate in Hz, ALSA rate bitmask, HDA format value */
672 /* autodetected value used in snd_hda_query_supported_pcm */
673 { 8000, SNDRV_PCM_RATE_8000, HDA_RATE(48, 1, 6) },
674 { 11025, SNDRV_PCM_RATE_11025, HDA_RATE(44, 1, 4) },
675 { 16000, SNDRV_PCM_RATE_16000, HDA_RATE(48, 1, 3) },
676 { 22050, SNDRV_PCM_RATE_22050, HDA_RATE(44, 1, 2) },
677 { 32000, SNDRV_PCM_RATE_32000, HDA_RATE(48, 2, 3) },
678 { 44100, SNDRV_PCM_RATE_44100, HDA_RATE(44, 1, 1) },
679 { 48000, SNDRV_PCM_RATE_48000, HDA_RATE(48, 1, 1) },
680 { 88200, SNDRV_PCM_RATE_88200, HDA_RATE(44, 2, 1) },
681 { 96000, SNDRV_PCM_RATE_96000, HDA_RATE(48, 2, 1) },
682 { 176400, SNDRV_PCM_RATE_176400, HDA_RATE(44, 4, 1) },
683 { 192000, SNDRV_PCM_RATE_192000, HDA_RATE(48, 4, 1) },
684 #define AC_PAR_PCM_RATE_BITS 11
685 /* up to bits 10, 384kHZ isn't supported properly */
687 /* not autodetected value */
688 { 9600, SNDRV_PCM_RATE_KNOT, HDA_RATE(48, 1, 5) },
690 { 0 } /* terminator */
694 * snd_hdac_calc_stream_format - calculate the format bitset
695 * @rate: the sample rate
696 * @channels: the number of channels
697 * @format: the PCM format (SNDRV_PCM_FORMAT_XXX)
698 * @maxbps: the max. bps
699 * @spdif_ctls: HD-audio SPDIF status bits (0 if irrelevant)
701 * Calculate the format bitset from the given rate, channels and th PCM format.
703 * Return zero if invalid.
705 unsigned int snd_hdac_calc_stream_format(unsigned int rate,
706 unsigned int channels,
709 unsigned short spdif_ctls)
712 unsigned int val = 0;
714 for (i = 0; rate_bits[i].hz; i++)
715 if (rate_bits[i].hz == rate) {
716 val = rate_bits[i].hda_fmt;
719 if (!rate_bits[i].hz)
722 if (channels == 0 || channels > 8)
726 switch (snd_pcm_format_width(format)) {
728 val |= AC_FMT_BITS_8;
731 val |= AC_FMT_BITS_16;
736 if (maxbps >= 32 || format == SNDRV_PCM_FORMAT_FLOAT_LE)
737 val |= AC_FMT_BITS_32;
738 else if (maxbps >= 24)
739 val |= AC_FMT_BITS_24;
741 val |= AC_FMT_BITS_20;
747 if (spdif_ctls & AC_DIG1_NONAUDIO)
748 val |= AC_FMT_TYPE_NON_PCM;
752 EXPORT_SYMBOL_GPL(snd_hdac_calc_stream_format);
754 static unsigned int query_pcm_param(struct hdac_device *codec, hda_nid_t nid)
756 unsigned int val = 0;
758 if (nid != codec->afg &&
759 (get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD))
760 val = snd_hdac_read_parm(codec, nid, AC_PAR_PCM);
761 if (!val || val == -1)
762 val = snd_hdac_read_parm(codec, codec->afg, AC_PAR_PCM);
763 if (!val || val == -1)
768 static unsigned int query_stream_param(struct hdac_device *codec, hda_nid_t nid)
770 unsigned int streams = snd_hdac_read_parm(codec, nid, AC_PAR_STREAM);
772 if (!streams || streams == -1)
773 streams = snd_hdac_read_parm(codec, codec->afg, AC_PAR_STREAM);
774 if (!streams || streams == -1)
780 * snd_hdac_query_supported_pcm - query the supported PCM rates and formats
781 * @codec: the codec object
783 * @ratesp: the pointer to store the detected rate bitflags
784 * @formatsp: the pointer to store the detected formats
785 * @bpsp: the pointer to store the detected format widths
787 * Queries the supported PCM rates and formats. The NULL @ratesp, @formatsp
788 * or @bsps argument is ignored.
790 * Returns 0 if successful, otherwise a negative error code.
792 int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
793 u32 *ratesp, u64 *formatsp, unsigned int *bpsp)
795 unsigned int i, val, wcaps;
797 wcaps = get_wcaps(codec, nid);
798 val = query_pcm_param(codec, nid);
802 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) {
804 rates |= rate_bits[i].alsa_bits;
808 "rates == 0 (nid=0x%x, val=0x%x, ovrd=%i)\n",
810 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0);
816 if (formatsp || bpsp) {
818 unsigned int streams, bps;
820 streams = query_stream_param(codec, nid);
825 if (streams & AC_SUPFMT_PCM) {
826 if (val & AC_SUPPCM_BITS_8) {
827 formats |= SNDRV_PCM_FMTBIT_U8;
830 if (val & AC_SUPPCM_BITS_16) {
831 formats |= SNDRV_PCM_FMTBIT_S16_LE;
834 if (wcaps & AC_WCAP_DIGITAL) {
835 if (val & AC_SUPPCM_BITS_32)
836 formats |= SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE;
837 if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24))
838 formats |= SNDRV_PCM_FMTBIT_S32_LE;
839 if (val & AC_SUPPCM_BITS_24)
841 else if (val & AC_SUPPCM_BITS_20)
843 } else if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24|
844 AC_SUPPCM_BITS_32)) {
845 formats |= SNDRV_PCM_FMTBIT_S32_LE;
846 if (val & AC_SUPPCM_BITS_32)
848 else if (val & AC_SUPPCM_BITS_24)
850 else if (val & AC_SUPPCM_BITS_20)
854 #if 0 /* FIXME: CS4206 doesn't work, which is the only codec supporting float */
855 if (streams & AC_SUPFMT_FLOAT32) {
856 formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
861 if (streams == AC_SUPFMT_AC3) {
862 /* should be exclusive */
863 /* temporary hack: we have still no proper support
864 * for the direct AC3 stream...
866 formats |= SNDRV_PCM_FMTBIT_U8;
871 "formats == 0 (nid=0x%x, val=0x%x, ovrd=%i, streams=0x%x)\n",
873 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0,
885 EXPORT_SYMBOL_GPL(snd_hdac_query_supported_pcm);
888 * snd_hdac_is_supported_format - Check the validity of the format
889 * @codec: the codec object
891 * @format: the HD-audio format value to check
893 * Check whether the given node supports the format value.
895 * Returns true if supported, false if not.
897 bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
901 unsigned int val = 0, rate, stream;
903 val = query_pcm_param(codec, nid);
907 rate = format & 0xff00;
908 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++)
909 if (rate_bits[i].hda_fmt == rate) {
914 if (i >= AC_PAR_PCM_RATE_BITS)
917 stream = query_stream_param(codec, nid);
921 if (stream & AC_SUPFMT_PCM) {
922 switch (format & 0xf0) {
924 if (!(val & AC_SUPPCM_BITS_8))
928 if (!(val & AC_SUPPCM_BITS_16))
932 if (!(val & AC_SUPPCM_BITS_20))
936 if (!(val & AC_SUPPCM_BITS_24))
940 if (!(val & AC_SUPPCM_BITS_32))
947 /* FIXME: check for float32 and AC3? */
952 EXPORT_SYMBOL_GPL(snd_hdac_is_supported_format);