linux/sound/hda/intel-nhlt.c

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// 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);
int intel_nhlt_ssp_device_type(struct device *dev, struct nhlt_acpi_table *nhlt,
u8 virtual_bus_id)
{
struct nhlt_endpoint *epnt;
int i;
if (!nhlt)
return -EINVAL;
epnt = (struct nhlt_endpoint *)nhlt->desc;
for (i = 0; i < nhlt->endpoint_count; i++) {
/* for SSP link the virtual bus id is the SSP port number */
if (epnt->linktype == NHLT_LINK_SSP &&
epnt->virtual_bus_id == virtual_bus_id) {
dev_dbg(dev, "SSP%d: dev_type=%d\n", virtual_bus_id,
epnt->device_type);
return epnt->device_type;
}
epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
}
return -EINVAL;
}
EXPORT_SYMBOL(intel_nhlt_ssp_device_type);