[thirdparty/kernel/stable.git] / sound / hda / intel-nhlt.c

// SPDX-License-Identifier: GPL-2.0-only
// Copyright (c) 2015-2019 Intel Corporation

#include <linux/acpi.h>
#include <sound/intel-nhlt.h>

struct nhlt_acpi_table *intel_nhlt_init(struct device *dev)
{
	struct nhlt_acpi_table *nhlt;
	acpi_status status;

	status = acpi_get_table(ACPI_SIG_NHLT, 0,
				(struct acpi_table_header **)&nhlt);
	if (ACPI_FAILURE(status)) {
		dev_warn(dev, "NHLT table not found\n");
		return NULL;
	}

	return nhlt;
}
EXPORT_SYMBOL_GPL(intel_nhlt_init);

void intel_nhlt_free(struct nhlt_acpi_table *nhlt)
{
	acpi_put_table((struct acpi_table_header *)nhlt);
}
EXPORT_SYMBOL_GPL(intel_nhlt_free);

int intel_nhlt_get_dmic_geo(struct device *dev, struct nhlt_acpi_table *nhlt)
{
	struct nhlt_endpoint *epnt;
	struct nhlt_dmic_array_config *cfg;
	struct nhlt_vendor_dmic_array_config *cfg_vendor;
	struct nhlt_fmt *fmt_configs;
	unsigned int dmic_geo = 0;
	u16 max_ch = 0;
	u8 i, j;

	if (!nhlt)
		return 0;

	if (nhlt->header.length <= sizeof(struct acpi_table_header)) {
		dev_warn(dev, "Invalid DMIC description table\n");
		return 0;
	}

	for (j = 0, epnt = nhlt->desc; j < nhlt->endpoint_count; j++,
	     epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length)) {

		if (epnt->linktype != NHLT_LINK_DMIC)
			continue;

		cfg = (struct nhlt_dmic_array_config  *)(epnt->config.caps);
		fmt_configs = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size);

		/* find max number of channels based on format_configuration */
		if (fmt_configs->fmt_count) {
			struct nhlt_fmt_cfg *fmt_cfg = fmt_configs->fmt_config;

			dev_dbg(dev, "found %d format definitions\n",
				fmt_configs->fmt_count);

			for (i = 0; i < fmt_configs->fmt_count; i++) {
				struct wav_fmt_ext *fmt_ext;

				fmt_ext = &fmt_cfg->fmt_ext;

				if (fmt_ext->fmt.channels > max_ch)
					max_ch = fmt_ext->fmt.channels;

				/* Move to the next nhlt_fmt_cfg */
				fmt_cfg = (struct nhlt_fmt_cfg *)(fmt_cfg->config.caps +
								  fmt_cfg->config.size);
			}
			dev_dbg(dev, "max channels found %d\n", max_ch);
		} else {
			dev_dbg(dev, "No format information found\n");
		}

		if (cfg->device_config.config_type != NHLT_CONFIG_TYPE_MIC_ARRAY) {
			dmic_geo = max_ch;
		} else {
			switch (cfg->array_type) {
			case NHLT_MIC_ARRAY_2CH_SMALL:
			case NHLT_MIC_ARRAY_2CH_BIG:
				dmic_geo = MIC_ARRAY_2CH;
				break;

			case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
			case NHLT_MIC_ARRAY_4CH_L_SHAPED:
			case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
				dmic_geo = MIC_ARRAY_4CH;
				break;
			case NHLT_MIC_ARRAY_VENDOR_DEFINED:
				cfg_vendor = (struct nhlt_vendor_dmic_array_config *)cfg;
				dmic_geo = cfg_vendor->nb_mics;
				break;
			default:
				dev_warn(dev, "%s: undefined DMIC array_type 0x%0x\n",
					 __func__, cfg->array_type);
			}

			if (dmic_geo > 0) {
				dev_dbg(dev, "Array with %d dmics\n", dmic_geo);
			}
			if (max_ch > dmic_geo) {
				dev_dbg(dev, "max channels %d exceed dmic number %d\n",
					max_ch, dmic_geo);
			}
		}
	}

	dev_dbg(dev, "dmic number %d max_ch %d\n", dmic_geo, max_ch);

	return dmic_geo;
}
EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo);

bool intel_nhlt_has_endpoint_type(struct nhlt_acpi_table *nhlt, u8 link_type)
{
	struct nhlt_endpoint *epnt;
	int i;

	if (!nhlt)
		return false;

	epnt = (struct nhlt_endpoint *)nhlt->desc;
	for (i = 0; i < nhlt->endpoint_count; i++) {
		if (epnt->linktype == link_type)
			return true;

		epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
	}
	return false;
}
EXPORT_SYMBOL(intel_nhlt_has_endpoint_type);

int intel_nhlt_ssp_endpoint_mask(struct nhlt_acpi_table *nhlt, u8 device_type)
{
	struct nhlt_endpoint *epnt;
	int ssp_mask = 0;
	int i;

	if (!nhlt || (device_type != NHLT_DEVICE_BT && device_type != NHLT_DEVICE_I2S))
		return 0;

	epnt = (struct nhlt_endpoint *)nhlt->desc;
	for (i = 0; i < nhlt->endpoint_count; i++) {
		if (epnt->linktype == NHLT_LINK_SSP && epnt->device_type == device_type) {
			/* for SSP the virtual bus id is the SSP port */
			ssp_mask |= BIT(epnt->virtual_bus_id);
		}
		epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
	}

	return ssp_mask;
}
EXPORT_SYMBOL(intel_nhlt_ssp_endpoint_mask);

#define SSP_BLOB_V1_0_SIZE		84
#define SSP_BLOB_V1_0_MDIVC_OFFSET	19 /* offset in u32 */

#define SSP_BLOB_V1_5_SIZE		96
#define SSP_BLOB_V1_5_MDIVC_OFFSET	21 /* offset in u32 */
#define SSP_BLOB_VER_1_5		0xEE000105

#define SSP_BLOB_V2_0_SIZE		88
#define SSP_BLOB_V2_0_MDIVC_OFFSET	20 /* offset in u32 */
#define SSP_BLOB_VER_2_0		0xEE000200

int intel_nhlt_ssp_mclk_mask(struct nhlt_acpi_table *nhlt, int ssp_num)
{
	struct nhlt_endpoint *epnt;
	struct nhlt_fmt *fmt;
	struct nhlt_fmt_cfg *cfg;
	int mclk_mask = 0;
	int i, j;

	if (!nhlt)
		return 0;

	epnt = (struct nhlt_endpoint *)nhlt->desc;
	for (i = 0; i < nhlt->endpoint_count; i++) {

		/* we only care about endpoints connected to an audio codec over SSP */
		if (epnt->linktype == NHLT_LINK_SSP &&
		    epnt->device_type == NHLT_DEVICE_I2S &&
		    epnt->virtual_bus_id == ssp_num) {

			fmt = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size);
			cfg = fmt->fmt_config;

			/*
			 * In theory all formats should use the same MCLK but it doesn't hurt to
			 * double-check that the configuration is consistent
			 */
			for (j = 0; j < fmt->fmt_count; j++) {
				u32 *blob;
				int mdivc_offset;
				int size;

				/* first check we have enough data to read the blob type */
				if (cfg->config.size < 8)
					return -EINVAL;

				blob = (u32 *)cfg->config.caps;

				if (blob[1] == SSP_BLOB_VER_2_0) {
					mdivc_offset = SSP_BLOB_V2_0_MDIVC_OFFSET;
					size = SSP_BLOB_V2_0_SIZE;
				} else if (blob[1] == SSP_BLOB_VER_1_5) {
					mdivc_offset = SSP_BLOB_V1_5_MDIVC_OFFSET;
					size = SSP_BLOB_V1_5_SIZE;
				} else {
					mdivc_offset = SSP_BLOB_V1_0_MDIVC_OFFSET;
					size = SSP_BLOB_V1_0_SIZE;
				}

				/* make sure we have enough data for the fixed part of the blob */
				if (cfg->config.size < size)
					return -EINVAL;

				mclk_mask |=  blob[mdivc_offset] & GENMASK(1, 0);

				cfg = (struct nhlt_fmt_cfg *)(cfg->config.caps + cfg->config.size);
			}
		}
		epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
	}

	/* make sure only one MCLK is used */
	if (hweight_long(mclk_mask) != 1)
		return -EINVAL;

	return mclk_mask;
}
EXPORT_SYMBOL(intel_nhlt_ssp_mclk_mask);

static struct nhlt_specific_cfg *
nhlt_get_specific_cfg(struct device *dev, struct nhlt_fmt *fmt, u8 num_ch,
		      u32 rate, u8 vbps, u8 bps, bool ignore_vbps)
{
	struct nhlt_fmt_cfg *cfg = fmt->fmt_config;
	struct wav_fmt *wfmt;
	u16 _bps, _vbps;
	int i;

	dev_dbg(dev, "Endpoint format count=%d\n", fmt->fmt_count);

	for (i = 0; i < fmt->fmt_count; i++) {
		wfmt = &cfg->fmt_ext.fmt;
		_bps = wfmt->bits_per_sample;
		_vbps = cfg->fmt_ext.sample.valid_bits_per_sample;

		dev_dbg(dev, "Endpoint format: ch=%d fmt=%d/%d rate=%d\n",
			wfmt->channels, _vbps, _bps, wfmt->samples_per_sec);

		/*
		 * When looking for exact match of configuration ignore the vbps
		 * from NHLT table when ignore_vbps is true
		 */
		if (wfmt->channels == num_ch && wfmt->samples_per_sec == rate &&
		    (ignore_vbps || vbps == _vbps) && bps == _bps)
			return &cfg->config;

		cfg = (struct nhlt_fmt_cfg *)(cfg->config.caps + cfg->config.size);
	}

	return NULL;
}

static bool nhlt_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt,
				u32 bus_id, u8 link_type, u8 dir, u8 dev_type)
{
	dev_dbg(dev, "Endpoint: vbus_id=%d link_type=%d dir=%d dev_type = %d\n",
		epnt->virtual_bus_id, epnt->linktype,
		epnt->direction, epnt->device_type);

	if ((epnt->virtual_bus_id != bus_id) ||
	    (epnt->linktype != link_type) ||
	    (epnt->direction != dir))
		return false;

	/* link of type DMIC bypasses device_type check */
	return epnt->linktype == NHLT_LINK_DMIC ||
	       epnt->device_type == dev_type;
}

struct nhlt_specific_cfg *
intel_nhlt_get_endpoint_blob(struct device *dev, struct nhlt_acpi_table *nhlt,
			     u32 bus_id, u8 link_type, u8 vbps, u8 bps,
			     u8 num_ch, u32 rate, u8 dir, u8 dev_type)
{
	struct nhlt_specific_cfg *cfg;
	struct nhlt_endpoint *epnt;
	bool ignore_vbps = false;
	struct nhlt_fmt *fmt;
	int i;

	if (!nhlt)
		return NULL;

	dev_dbg(dev, "Looking for configuration:\n");
	dev_dbg(dev, "  vbus_id=%d link_type=%d dir=%d, dev_type=%d\n",
		bus_id, link_type, dir, dev_type);
	if (link_type == NHLT_LINK_DMIC && bps == 32 && (vbps == 24 || vbps == 32)) {
		/*
		 * The DMIC hardware supports only one type of 32 bits sample
		 * size, which is 24 bit sampling on the MSB side and bits[1:0]
		 * are used for indicating the channel number.
		 * It has been observed that some NHLT tables have the vbps
		 * specified as 32 while some uses 24.
		 * The format these variations describe are identical, the
		 * hardware is configured and behaves the same way.
		 * Note: when the samples assumed to be vbps=32 then the 'noise'
		 * introduced by the lower two bits (channel number) have no
		 * real life implication on audio quality.
		 */
		dev_dbg(dev,
			"  ch=%d fmt=%d rate=%d (vbps is ignored for DMIC 32bit format)\n",
			num_ch, bps, rate);
		ignore_vbps = true;
	} else {
		dev_dbg(dev, "  ch=%d fmt=%d/%d rate=%d\n", num_ch, vbps, bps, rate);
	}
	dev_dbg(dev, "Endpoint count=%d\n", nhlt->endpoint_count);

	epnt = (struct nhlt_endpoint *)nhlt->desc;

	for (i = 0; i < nhlt->endpoint_count; i++) {
		if (nhlt_check_ep_match(dev, epnt, bus_id, link_type, dir, dev_type)) {
			fmt = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size);

			cfg = nhlt_get_specific_cfg(dev, fmt, num_ch, rate,
						    vbps, bps, ignore_vbps);
			if (cfg)
				return cfg;
		}

		epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
	}

	return NULL;
}
EXPORT_SYMBOL(intel_nhlt_get_endpoint_blob);
Commit	Line	Data
e149ca29	1	// SPDX-License-Identifier: GPL-2.0-only
303681f4 PLB	2	// Copyright (c) 2015-2019 Intel Corporation
	3
	4	#include <linux/acpi.h>
	5	#include <sound/intel-nhlt.h>
	6
303681f4 PLB	7	struct nhlt_acpi_table intel_nhlt_init(struct device dev)
303681f4 PLB	8	{
0d283287 CR	9	struct nhlt_acpi_table *nhlt;
0d283287 CR	10	acpi_status status;
303681f4	11
0d283287 CR	12	status = acpi_get_table(ACPI_SIG_NHLT, 0,
	13	(struct acpi_table_header **)&nhlt);
	14	if (ACPI_FAILURE(status)) {
	15	dev_warn(dev, "NHLT table not found\n");
303681f4 PLB	16	return NULL;
	17	}
	18
0d283287	19	return nhlt;
303681f4 PLB	20	}
	21	EXPORT_SYMBOL_GPL(intel_nhlt_init);
	22
	23	void intel_nhlt_free(struct nhlt_acpi_table *nhlt)
	24	{
0d283287	25	acpi_put_table((struct acpi_table_header *)nhlt);
303681f4 PLB	26	}
	27	EXPORT_SYMBOL_GPL(intel_nhlt_free);
	28
	29	int intel_nhlt_get_dmic_geo(struct device dev, struct nhlt_acpi_table nhlt)
	30	{
	31	struct nhlt_endpoint *epnt;
	32	struct nhlt_dmic_array_config *cfg;
7a33ea70	33	struct nhlt_vendor_dmic_array_config *cfg_vendor;
a864e8f1	34	struct nhlt_fmt *fmt_configs;
303681f4	35	unsigned int dmic_geo = 0;
a864e8f1 PLB	36	u16 max_ch = 0;
a864e8f1 PLB	37	u8 i, j;
303681f4 PLB	38
	39	if (!nhlt)
	40	return 0;
	41
a14a6219 MP	42	if (nhlt->header.length <= sizeof(struct acpi_table_header)) {
	43	dev_warn(dev, "Invalid DMIC description table\n");
	44	return 0;
	45	}
	46
a864e8f1 PLB	47	for (j = 0, epnt = nhlt->desc; j < nhlt->endpoint_count; j++,
a864e8f1 PLB	48	epnt = (struct nhlt_endpoint )((u8 )epnt + epnt->length)) {
303681f4	49
a864e8f1 PLB	50	if (epnt->linktype != NHLT_LINK_DMIC)
	51	continue;
	52
	53	cfg = (struct nhlt_dmic_array_config *)(epnt->config.caps);
	54	fmt_configs = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size);
	55
	56	/* find max number of channels based on format_configuration */
	57	if (fmt_configs->fmt_count) {
2e6481a3 PU	58	struct nhlt_fmt_cfg *fmt_cfg = fmt_configs->fmt_config;
2e6481a3 PU	59
6376ab02 PLB	60	dev_dbg(dev, "found %d format definitions\n",
6376ab02 PLB	61	fmt_configs->fmt_count);
a864e8f1 PLB	62
	63	for (i = 0; i < fmt_configs->fmt_count; i++) {
	64	struct wav_fmt_ext *fmt_ext;
	65
2e6481a3	66	fmt_ext = &fmt_cfg->fmt_ext;
a864e8f1 PLB	67
	68	if (fmt_ext->fmt.channels > max_ch)
	69	max_ch = fmt_ext->fmt.channels;
2e6481a3 PU	70
	71	/* Move to the next nhlt_fmt_cfg */
	72	fmt_cfg = (struct nhlt_fmt_cfg *)(fmt_cfg->config.caps +
	73	fmt_cfg->config.size);
a864e8f1	74	}
6376ab02	75	dev_dbg(dev, "max channels found %d\n", max_ch);
a864e8f1	76	} else {
6376ab02	77	dev_dbg(dev, "No format information found\n");
a864e8f1 PLB	78	}
	79
	80	if (cfg->device_config.config_type != NHLT_CONFIG_TYPE_MIC_ARRAY) {
	81	dmic_geo = max_ch;
	82	} else {
303681f4 PLB	83	switch (cfg->array_type) {
	84	case NHLT_MIC_ARRAY_2CH_SMALL:
	85	case NHLT_MIC_ARRAY_2CH_BIG:
	86	dmic_geo = MIC_ARRAY_2CH;
	87	break;
	88
	89	case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
	90	case NHLT_MIC_ARRAY_4CH_L_SHAPED:
	91	case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
	92	dmic_geo = MIC_ARRAY_4CH;
	93	break;
7a33ea70 PLB	94	case NHLT_MIC_ARRAY_VENDOR_DEFINED:
	95	cfg_vendor = (struct nhlt_vendor_dmic_array_config *)cfg;
	96	dmic_geo = cfg_vendor->nb_mics;
	97	break;
303681f4	98	default:
a864e8f1 PLB	99	dev_warn(dev, "%s: undefined DMIC array_type 0x%0x\n",
	100	__func__, cfg->array_type);
	101	}
	102
	103	if (dmic_geo > 0) {
6376ab02	104	dev_dbg(dev, "Array with %d dmics\n", dmic_geo);
a864e8f1 PLB	105	}
a864e8f1 PLB	106	if (max_ch > dmic_geo) {
6376ab02 PLB	107	dev_dbg(dev, "max channels %d exceed dmic number %d\n",
6376ab02 PLB	108	max_ch, dmic_geo);
303681f4 PLB	109	}
303681f4 PLB	110	}
303681f4 PLB	111	}
303681f4 PLB	112
6376ab02	113	dev_dbg(dev, "dmic number %d max_ch %d\n", dmic_geo, max_ch);
a864e8f1	114
303681f4 PLB	115	return dmic_geo;
	116	}
	117	EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo);
15fa179f AS	118
	119	bool intel_nhlt_has_endpoint_type(struct nhlt_acpi_table *nhlt, u8 link_type)
	120	{
	121	struct nhlt_endpoint *epnt;
	122	int i;
	123
	124	if (!nhlt)
	125	return false;
	126
	127	epnt = (struct nhlt_endpoint *)nhlt->desc;
	128	for (i = 0; i < nhlt->endpoint_count; i++) {
	129	if (epnt->linktype == link_type)
	130	return true;
	131
	132	epnt = (struct nhlt_endpoint )((u8 )epnt + epnt->length);
	133	}
	134	return false;
	135	}
	136	EXPORT_SYMBOL(intel_nhlt_has_endpoint_type);
	137
0c470db0 PLB	138	int intel_nhlt_ssp_endpoint_mask(struct nhlt_acpi_table *nhlt, u8 device_type)
	139	{
	140	struct nhlt_endpoint *epnt;
	141	int ssp_mask = 0;
	142	int i;
	143
	144	if (!nhlt \|\| (device_type != NHLT_DEVICE_BT && device_type != NHLT_DEVICE_I2S))
	145	return 0;
	146
	147	epnt = (struct nhlt_endpoint *)nhlt->desc;
	148	for (i = 0; i < nhlt->endpoint_count; i++) {
	149	if (epnt->linktype == NHLT_LINK_SSP && epnt->device_type == device_type) {
	150	/* for SSP the virtual bus id is the SSP port */
	151	ssp_mask \|= BIT(epnt->virtual_bus_id);
	152	}
	153	epnt = (struct nhlt_endpoint )((u8 )epnt + epnt->length);
	154	}
	155
	156	return ssp_mask;
	157	}
	158	EXPORT_SYMBOL(intel_nhlt_ssp_endpoint_mask);
	159
72176fcc PLB	160	#define SSP_BLOB_V1_0_SIZE 84
	161	#define SSP_BLOB_V1_0_MDIVC_OFFSET 19 /* offset in u32 */
	162
	163	#define SSP_BLOB_V1_5_SIZE 96
	164	#define SSP_BLOB_V1_5_MDIVC_OFFSET 21 /* offset in u32 */
	165	#define SSP_BLOB_VER_1_5 0xEE000105
	166
	167	#define SSP_BLOB_V2_0_SIZE 88
	168	#define SSP_BLOB_V2_0_MDIVC_OFFSET 20 /* offset in u32 */
	169	#define SSP_BLOB_VER_2_0 0xEE000200
	170
	171	int intel_nhlt_ssp_mclk_mask(struct nhlt_acpi_table *nhlt, int ssp_num)
	172	{
	173	struct nhlt_endpoint *epnt;
	174	struct nhlt_fmt *fmt;
	175	struct nhlt_fmt_cfg *cfg;
	176	int mclk_mask = 0;
	177	int i, j;
	178
	179	if (!nhlt)
	180	return 0;
	181
	182	epnt = (struct nhlt_endpoint *)nhlt->desc;
	183	for (i = 0; i < nhlt->endpoint_count; i++) {
	184
	185	/* we only care about endpoints connected to an audio codec over SSP */
	186	if (epnt->linktype == NHLT_LINK_SSP &&
	187	epnt->device_type == NHLT_DEVICE_I2S &&
	188	epnt->virtual_bus_id == ssp_num) {
	189
	190	fmt = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size);
	191	cfg = fmt->fmt_config;
	192
	193	/*
	194	* In theory all formats should use the same MCLK but it doesn't hurt to
	195	* double-check that the configuration is consistent
	196	*/
	197	for (j = 0; j < fmt->fmt_count; j++) {
	198	u32 *blob;
	199	int mdivc_offset;
	200	int size;
	201
	202	/* first check we have enough data to read the blob type */
	203	if (cfg->config.size < 8)
	204	return -EINVAL;
	205
	206	blob = (u32 *)cfg->config.caps;
	207
	208	if (blob[1] == SSP_BLOB_VER_2_0) {
	209	mdivc_offset = SSP_BLOB_V2_0_MDIVC_OFFSET;
	210	size = SSP_BLOB_V2_0_SIZE;
	211	} else if (blob[1] == SSP_BLOB_VER_1_5) {
	212	mdivc_offset = SSP_BLOB_V1_5_MDIVC_OFFSET;
	213	size = SSP_BLOB_V1_5_SIZE;
	214	} else {
	215	mdivc_offset = SSP_BLOB_V1_0_MDIVC_OFFSET;
	216	size = SSP_BLOB_V1_0_SIZE;
	217	}
	218
	219	/* make sure we have enough data for the fixed part of the blob */
	220	if (cfg->config.size < size)
	221	return -EINVAL;
	222
	223	mclk_mask \|= blob[mdivc_offset] & GENMASK(1, 0);
224
225	cfg = (struct nhlt_fmt_cfg *)(cfg->config.caps + cfg->config.size);
226	}
227	}
228	epnt = (struct nhlt_endpoint )((u8 )epnt + epnt->length);
229	}
230
231	/* make sure only one MCLK is used */
232	if (hweight_long(mclk_mask) != 1)
233	return -EINVAL;
234
235	return mclk_mask;
236	}
237	EXPORT_SYMBOL(intel_nhlt_ssp_mclk_mask);
238
15fa179f AS	239	static struct nhlt_specific_cfg *
15fa179f AS	240	nhlt_get_specific_cfg(struct device dev, struct nhlt_fmt fmt, u8 num_ch,
7b4c93a5	241	u32 rate, u8 vbps, u8 bps, bool ignore_vbps)
15fa179f AS	242	{
	243	struct nhlt_fmt_cfg *cfg = fmt->fmt_config;
	244	struct wav_fmt *wfmt;
	245	u16 _bps, _vbps;
	246	int i;
	247
	248	dev_dbg(dev, "Endpoint format count=%d\n", fmt->fmt_count);
	249
	250	for (i = 0; i < fmt->fmt_count; i++) {
	251	wfmt = &cfg->fmt_ext.fmt;
	252	_bps = wfmt->bits_per_sample;
	253	_vbps = cfg->fmt_ext.sample.valid_bits_per_sample;
	254
	255	dev_dbg(dev, "Endpoint format: ch=%d fmt=%d/%d rate=%d\n",
	256	wfmt->channels, _vbps, _bps, wfmt->samples_per_sec);
	257
7b4c93a5 PU	258	/*
	259	* When looking for exact match of configuration ignore the vbps
	260	* from NHLT table when ignore_vbps is true
	261	*/
15fa179f	262	if (wfmt->channels == num_ch && wfmt->samples_per_sec == rate &&
7b4c93a5	263	(ignore_vbps \|\| vbps == _vbps) && bps == _bps)
15fa179f AS	264	return &cfg->config;
	265
	266	cfg = (struct nhlt_fmt_cfg *)(cfg->config.caps + cfg->config.size);
	267	}
	268
	269	return NULL;
	270	}
	271
	272	static bool nhlt_check_ep_match(struct device dev, struct nhlt_endpoint epnt,
	273	u32 bus_id, u8 link_type, u8 dir, u8 dev_type)
	274	{
	275	dev_dbg(dev, "Endpoint: vbus_id=%d link_type=%d dir=%d dev_type = %d\n",
	276	epnt->virtual_bus_id, epnt->linktype,
	277	epnt->direction, epnt->device_type);
	278
	279	if ((epnt->virtual_bus_id != bus_id) \|\|
	280	(epnt->linktype != link_type) \|\|
	281	(epnt->direction != dir))
	282	return false;
	283
	284	/* link of type DMIC bypasses device_type check */
	285	return epnt->linktype == NHLT_LINK_DMIC \|\|
	286	epnt->device_type == dev_type;
	287	}
	288
	289	struct nhlt_specific_cfg *
	290	intel_nhlt_get_endpoint_blob(struct device dev, struct nhlt_acpi_table nhlt,
	291	u32 bus_id, u8 link_type, u8 vbps, u8 bps,
	292	u8 num_ch, u32 rate, u8 dir, u8 dev_type)
	293	{
	294	struct nhlt_specific_cfg *cfg;
	295	struct nhlt_endpoint *epnt;
7b4c93a5	296	bool ignore_vbps = false;
15fa179f AS	297	struct nhlt_fmt *fmt;
	298	int i;
	299
	300	if (!nhlt)
	301	return NULL;
	302
	303	dev_dbg(dev, "Looking for configuration:\n");
	304	dev_dbg(dev, " vbus_id=%d link_type=%d dir=%d, dev_type=%d\n",
	305	bus_id, link_type, dir, dev_type);
7b4c93a5 PU	306	if (link_type == NHLT_LINK_DMIC && bps == 32 && (vbps == 24 \|\| vbps == 32)) {
	307	/*
	308	* The DMIC hardware supports only one type of 32 bits sample
	309	* size, which is 24 bit sampling on the MSB side and bits[1:0]
	310	* are used for indicating the channel number.
	311	* It has been observed that some NHLT tables have the vbps
	312	* specified as 32 while some uses 24.
	313	* The format these variations describe are identical, the
	314	* hardware is configured and behaves the same way.
	315	* Note: when the samples assumed to be vbps=32 then the 'noise'
	316	* introduced by the lower two bits (channel number) have no
	317	* real life implication on audio quality.
	318	*/
	319	dev_dbg(dev,
	320	" ch=%d fmt=%d rate=%d (vbps is ignored for DMIC 32bit format)\n",
	321	num_ch, bps, rate);
	322	ignore_vbps = true;
	323	} else {
	324	dev_dbg(dev, " ch=%d fmt=%d/%d rate=%d\n", num_ch, vbps, bps, rate);
	325	}
15fa179f AS	326	dev_dbg(dev, "Endpoint count=%d\n", nhlt->endpoint_count);
	327
	328	epnt = (struct nhlt_endpoint *)nhlt->desc;
	329
	330	for (i = 0; i < nhlt->endpoint_count; i++) {
	331	if (nhlt_check_ep_match(dev, epnt, bus_id, link_type, dir, dev_type)) {
	332	fmt = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size);
	333
7b4c93a5 PU	334	cfg = nhlt_get_specific_cfg(dev, fmt, num_ch, rate,
7b4c93a5 PU	335	vbps, bps, ignore_vbps);
15fa179f AS	336	if (cfg)
	337	return cfg;
	338	}
	339
	340	epnt = (struct nhlt_endpoint )((u8 )epnt + epnt->length);
	341	}
	342
	343	return NULL;
	344	}
	345	EXPORT_SYMBOL(intel_nhlt_get_endpoint_blob);