xref: /linux/sound/hda/intel-nhlt.c (revision b82779648dfd3814df4e381f086326ec70fd791f)
1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright (c) 2015-2019 Intel Corporation
3 
4 #include <linux/acpi.h>
5 #include <sound/intel-nhlt.h>
6 
intel_nhlt_init(struct device * dev)7 struct nhlt_acpi_table *intel_nhlt_init(struct device *dev)
8 {
9 	struct nhlt_acpi_table *nhlt;
10 	acpi_status status;
11 
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");
16 		return NULL;
17 	}
18 
19 	return nhlt;
20 }
21 EXPORT_SYMBOL_GPL(intel_nhlt_init);
22 
intel_nhlt_free(struct nhlt_acpi_table * nhlt)23 void intel_nhlt_free(struct nhlt_acpi_table *nhlt)
24 {
25 	acpi_put_table((struct acpi_table_header *)nhlt);
26 }
27 EXPORT_SYMBOL_GPL(intel_nhlt_free);
28 
intel_nhlt_get_dmic_geo(struct device * dev,struct nhlt_acpi_table * nhlt)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;
33 	struct nhlt_vendor_dmic_array_config *cfg_vendor;
34 	struct nhlt_fmt *fmt_configs;
35 	unsigned int dmic_geo = 0;
36 	u16 max_ch = 0;
37 	u8 i, j;
38 
39 	if (!nhlt)
40 		return 0;
41 
42 	if (nhlt->header.length <= sizeof(struct acpi_table_header)) {
43 		dev_warn(dev, "Invalid DMIC description table\n");
44 		return 0;
45 	}
46 
47 	for (j = 0, epnt = nhlt->desc; j < nhlt->endpoint_count; j++,
48 	     epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length)) {
49 
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) {
58 			struct nhlt_fmt_cfg *fmt_cfg = fmt_configs->fmt_config;
59 
60 			dev_dbg(dev, "found %d format definitions\n",
61 				fmt_configs->fmt_count);
62 
63 			for (i = 0; i < fmt_configs->fmt_count; i++) {
64 				struct wav_fmt_ext *fmt_ext;
65 
66 				fmt_ext = &fmt_cfg->fmt_ext;
67 
68 				if (fmt_ext->fmt.channels > max_ch)
69 					max_ch = fmt_ext->fmt.channels;
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);
74 			}
75 			dev_dbg(dev, "max channels found %d\n", max_ch);
76 		} else {
77 			dev_dbg(dev, "No format information found\n");
78 		}
79 
80 		if (cfg->device_config.config_type != NHLT_CONFIG_TYPE_MIC_ARRAY) {
81 			dmic_geo = max_ch;
82 		} else {
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;
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;
98 			default:
99 				dev_warn(dev, "%s: undefined DMIC array_type 0x%0x\n",
100 					 __func__, cfg->array_type);
101 			}
102 
103 			if (dmic_geo > 0) {
104 				dev_dbg(dev, "Array with %d dmics\n", dmic_geo);
105 			}
106 			if (max_ch > dmic_geo) {
107 				dev_dbg(dev, "max channels %d exceed dmic number %d\n",
108 					max_ch, dmic_geo);
109 			}
110 		}
111 	}
112 
113 	dev_dbg(dev, "dmic number %d max_ch %d\n", dmic_geo, max_ch);
114 
115 	return dmic_geo;
116 }
117 EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo);
118 
intel_nhlt_has_endpoint_type(struct nhlt_acpi_table * nhlt,u8 link_type)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 
intel_nhlt_ssp_endpoint_mask(struct nhlt_acpi_table * nhlt,u8 device_type)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 
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 
intel_nhlt_ssp_mclk_mask(struct nhlt_acpi_table * nhlt,int ssp_num)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 
239 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)240 nhlt_get_specific_cfg(struct device *dev, struct nhlt_fmt *fmt, u8 num_ch,
241 		      u32 rate, u8 vbps, u8 bps, bool ignore_vbps)
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 
258 		/*
259 		 * When looking for exact match of configuration ignore the vbps
260 		 * from NHLT table when ignore_vbps is true
261 		 */
262 		if (wfmt->channels == num_ch && wfmt->samples_per_sec == rate &&
263 		    (ignore_vbps || vbps == _vbps) && bps == _bps)
264 			return &cfg->config;
265 
266 		cfg = (struct nhlt_fmt_cfg *)(cfg->config.caps + cfg->config.size);
267 	}
268 
269 	return NULL;
270 }
271 
nhlt_check_ep_match(struct device * dev,struct nhlt_endpoint * epnt,u32 bus_id,u8 link_type,u8 dir,u8 dev_type)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 *
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)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;
296 	bool ignore_vbps = false;
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);
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 	}
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 
334 			cfg = nhlt_get_specific_cfg(dev, fmt, num_ch, rate,
335 						    vbps, bps, ignore_vbps);
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);
346 
intel_nhlt_ssp_device_type(struct device * dev,struct nhlt_acpi_table * nhlt,u8 virtual_bus_id)347 int intel_nhlt_ssp_device_type(struct device *dev, struct nhlt_acpi_table *nhlt,
348 			       u8 virtual_bus_id)
349 {
350 	struct nhlt_endpoint *epnt;
351 	int i;
352 
353 	if (!nhlt)
354 		return -EINVAL;
355 
356 	epnt = (struct nhlt_endpoint *)nhlt->desc;
357 	for (i = 0; i < nhlt->endpoint_count; i++) {
358 		/* for SSP link the virtual bus id is the SSP port number */
359 		if (epnt->linktype == NHLT_LINK_SSP &&
360 		    epnt->virtual_bus_id == virtual_bus_id) {
361 			dev_dbg(dev, "SSP%d: dev_type=%d\n", virtual_bus_id,
362 				epnt->device_type);
363 			return epnt->device_type;
364 		}
365 
366 		epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
367 	}
368 
369 	return -EINVAL;
370 }
371 EXPORT_SYMBOL(intel_nhlt_ssp_device_type);
372