summaryrefslogtreecommitdiffstats
path: root/sound/hda/intel-nhlt.c
blob: 696a958d93e9c336dea68748e59685e4c0569ee9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
// 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);