1
2
3
4#include <linux/acpi.h>
5#include <sound/intel-nhlt.h>
6
7struct 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}
21EXPORT_SYMBOL_GPL(intel_nhlt_init);
22
23void intel_nhlt_free(struct nhlt_acpi_table *nhlt)
24{
25 acpi_put_table((struct acpi_table_header *)nhlt);
26}
27EXPORT_SYMBOL_GPL(intel_nhlt_free);
28
29int 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
57 if (fmt_configs->fmt_count) {
58 dev_dbg(dev, "%s: found %d format definitions\n",
59 __func__, fmt_configs->fmt_count);
60
61 for (i = 0; i < fmt_configs->fmt_count; i++) {
62 struct wav_fmt_ext *fmt_ext;
63
64 fmt_ext = &fmt_configs->fmt_config[i].fmt_ext;
65
66 if (fmt_ext->fmt.channels > max_ch)
67 max_ch = fmt_ext->fmt.channels;
68 }
69 dev_dbg(dev, "%s: max channels found %d\n", __func__, max_ch);
70 } else {
71 dev_dbg(dev, "%s: No format information found\n", __func__);
72 }
73
74 if (cfg->device_config.config_type != NHLT_CONFIG_TYPE_MIC_ARRAY) {
75 dmic_geo = max_ch;
76 } else {
77 switch (cfg->array_type) {
78 case NHLT_MIC_ARRAY_2CH_SMALL:
79 case NHLT_MIC_ARRAY_2CH_BIG:
80 dmic_geo = MIC_ARRAY_2CH;
81 break;
82
83 case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
84 case NHLT_MIC_ARRAY_4CH_L_SHAPED:
85 case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
86 dmic_geo = MIC_ARRAY_4CH;
87 break;
88 case NHLT_MIC_ARRAY_VENDOR_DEFINED:
89 cfg_vendor = (struct nhlt_vendor_dmic_array_config *)cfg;
90 dmic_geo = cfg_vendor->nb_mics;
91 break;
92 default:
93 dev_warn(dev, "%s: undefined DMIC array_type 0x%0x\n",
94 __func__, cfg->array_type);
95 }
96
97 if (dmic_geo > 0) {
98 dev_dbg(dev, "%s: Array with %d dmics\n", __func__, dmic_geo);
99 }
100 if (max_ch > dmic_geo) {
101 dev_dbg(dev, "%s: max channels %d exceed dmic number %d\n",
102 __func__, max_ch, dmic_geo);
103 }
104 }
105 }
106
107 dev_dbg(dev, "%s: dmic number %d max_ch %d\n",
108 __func__, dmic_geo, max_ch);
109
110 return dmic_geo;
111}
112EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo);
113
