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x86: Add support for building up an NHLT structure

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The Intel Non-High-Definition-Audio Link Table (NHLT) table describes the
audio codecs and connections in a system. Various devices can contribute
information to produce the table.

Add functions to allow adding to the structure that is eventually written
to the ACPI tables. Also add the device-tree bindings.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2020-07-07 21:32:16 -06:00 committed by Bin Meng
parent bb6772c3ff
commit 7f926c9648
3 changed files with 797 additions and 0 deletions
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314
arch/x86/include/asm/acpi_nhlt.h Normal file
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@ -0,0 +1,314 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright 2020 Google LLC
*
* Modified from coreboot nhlt.h
*/
#ifndef _NHLT_H_
#define _NHLT_H_
struct acpi_ctx;
struct nhlt;
struct nhlt_endpoint;
struct nhlt_format;
struct nhlt_format_config;
/*
* Non HD Audio ACPI support. This table is typically used for Intel Smart
* Sound Technology DSP. It provides a way to encode opaque settings in
* the ACPI tables.
*
* While the structure fields of the NHLT structs are exposed below
* the SoC/chipset code should be the only other user manipulating the
* fields directly aside from the library itself.
*
* The NHLT table consists of endpoints which in turn contain different
* supporting stream formats. Each endpoint may contain a device specific
* configuration payload as well as each stream format.
*
* Most code should use the SoC variants of the functions because
* there is required logic needed to be performed by the SoC. The SoC
* code should be abstracting the inner details of these functions that
* specically apply to NHLT objects for that SoC.
*
* An example sequence:
*
* nhlt = nhlt_init()
* ep = nhlt_add_endpoint()
* nhlt_endpoint_append_config(ep)
* nhlt_endpoint_add_formats(ep)
* nhlt_soc_serialise()
*/
/* Obtain an nhlt object for adding endpoints. Returns NULL on error. */
struct nhlt *nhlt_init(void);
/* Return the size of the NHLT table including ACPI header. */
size_t nhlt_current_size(struct nhlt *nhlt);
/*
* Helper functions for adding NHLT devices utilizing an nhlt_endp_descriptor
* to drive the logic.
*/
struct nhlt_endp_descriptor {
/* NHLT endpoint types. */
int link;
int device;
int direction;
u16 vid;
u16 did;
/* Optional endpoint specific configuration data. */
const void *cfg;
size_t cfg_size;
/* Formats supported for endpoint. */
const struct nhlt_format_config *formats;
size_t num_formats;
};
/*
* Add the number of endpoints described by each descriptor. The virtual bus
* id for each descriptor is the default value of 0.
* Returns < 0 on error, 0 on success.
*/
int nhlt_add_endpoints(struct nhlt *nhlt,
const struct nhlt_endp_descriptor *epds,
size_t num_epds);
/*
* Add the number of endpoints associated with a single NHLT SSP instance id.
* Each endpoint described in the endpoint descriptor array uses the provided
* virtual bus id. Returns < 0 on error, 0 on success.
*/
int nhlt_add_ssp_endpoints(struct nhlt *nhlt, int virtual_bus_id,
const struct nhlt_endp_descriptor *epds,
size_t num_epds);
/*
* Add endpoint to NHLT object. Returns NULL on error.
*
* generic nhlt_add_endpoint() is called by the SoC code to provide
* the specific assumptions/uses for NHLT for that platform. All fields
* are the NHLT enumerations found within this header file.
*/
struct nhlt_endpoint *nhlt_add_endpoint(struct nhlt *nhlt, int link_type,
int device_type, int dir,
u16 vid, u16 did);
/*
* Append blob of configuration to the endpoint proper. Returns 0 on
* success, < 0 on error. A copy of the configuration is made so any
* resources pointed to by config can be freed after the call.
*/
int nhlt_endpoint_append_config(struct nhlt_endpoint *endpoint,
const void *config, size_t config_sz);
/* Add a format type to the provided endpoint. Returns NULL on error. */
struct nhlt_format *nhlt_add_format(struct nhlt_endpoint *endpoint,
int num_channels, int sample_freq_khz,
int container_bits_per_sample,
int valid_bits_per_sample,
u32 speaker_mask);
/*
* Append blob of configuration to the format proper. Returns 0 on
* success, < 0 on error. A copy of the configuration is made so any
* resources pointed to by config can be freed after the call.
*/
int nhlt_format_append_config(struct nhlt_format *format, const void *config,
size_t config_sz);
/*
* Add num_formats described by formats to the endpoint. This function
* effectively wraps nhlt_add_format() and nhlt_format_config() using the
* data found in each nhlt_format_config object. Returns 0 on success, < 0
* on error.
*/
int nhlt_endpoint_add_formats(struct nhlt_endpoint *endpoint,
const struct nhlt_format_config *formats,
size_t num_formats);
/*
* Increment the instance id for a given link type. This function is
* used for marking a device being completely added to the NHLT object.
* Subsequent endpoints added to the nhlt object with the same link type
* will use incremented instance id.
*/
void nhlt_next_instance(struct nhlt *nhlt, int link_type);
/*
* Serialize NHLT object to ACPI table. Take in the beginning address of where
* the table will reside and return the address of the next ACPI table. On
* error 0 will be returned. The NHLT object is no longer valid after this
* function is called.
*/
uintptr_t nhlt_serialise(struct nhlt *nhlt, uintptr_t acpi_addr);
/*
* Serialize NHLT object to ACPI table. Take in the beginning address of where
* the table will reside oem_id and oem_table_id and return the address of the
* next ACPI table. On error 0 will be returned. The NHLT object is no longer
* valid after this function is called.
*/
int nhlt_serialise_oem_overrides(struct acpi_ctx *ctx, struct nhlt *nhlt,
const char *oem_id, const char *oem_table_id,
u32 oem_revision);
int nhlt_setup(struct nhlt *nhlt, ofnode node);
/* Link and device types. */
enum {
NHLT_LINK_HDA,
NHLT_LINK_DSP,
NHLT_LINK_PDM,
NHLT_LINK_SSP,
NHLT_MAX_LINK_TYPES,
};
enum {
NHLT_SSP_DEV_BT, /* Bluetooth */
NHLT_SSP_DEV_MODEM,
NHLT_SSP_DEV_FM,
NHLT_SSP_DEV_RESERVED,
NHLT_SSP_DEV_I2S = 4,
};
enum {
NHLT_PDM_DEV,
};
/* Endpoint direction. */
enum {
NHLT_DIR_RENDER,
NHLT_DIR_CAPTURE,
NHLT_DIR_BIDIRECTIONAL,
};
/*
* Channel mask for an endpoint. While they are prefixed with 'SPEAKER' the
* channel masks are also used for capture devices
*/
enum {
SPEAKER_FRONT_LEFT = BIT(0),
SPEAKER_FRONT_RIGHT = BIT(1),
SPEAKER_FRONT_CENTER = BIT(2),
SPEAKER_LOW_FREQUENCY = BIT(3),
SPEAKER_BACK_LEFT = BIT(4),
SPEAKER_BACK_RIGHT = BIT(5),
SPEAKER_FRONT_LEFT_OF_CENTER = BIT(6),
SPEAKER_FRONT_RIGHT_OF_CENTER = BIT(7),
SPEAKER_BACK_CENTER = BIT(8),
SPEAKER_SIDE_LEFT = BIT(9),
SPEAKER_SIDE_RIGHT = BIT(10),
SPEAKER_TOP_CENTER = BIT(11),
SPEAKER_TOP_FRONT_LEFT = BIT(12),
SPEAKER_TOP_FRONT_CENTER = BIT(13),
SPEAKER_TOP_FRONT_RIGHT = BIT(14),
SPEAKER_TOP_BACK_LEFT = BIT(15),
SPEAKER_TOP_BACK_CENTER = BIT(16),
SPEAKER_TOP_BACK_RIGHT = BIT(17),
};
/*
* Supporting structures. Only SoC/chipset and the library code directly should
* be manipulating these structures
*/
struct sub_format {
u32 data1;
u16 data2;
u16 data3;
u8 data4[8];
};
struct nhlt_specific_config {
u32 size;
void *capabilities;
};
struct nhlt_waveform {
u16 tag;
u16 num_channels;
u32 samples_per_second;
u32 bytes_per_second;
u16 block_align;
u16 bits_per_sample;
u16 extra_size;
u16 valid_bits_per_sample;
u32 channel_mask;
struct sub_format sub_format;
};
struct nhlt_format {
struct nhlt_waveform waveform;
struct nhlt_specific_config config;
};
/*
* This struct is used by nhlt_endpoint_add_formats() for easily adding
* waveform formats with associated settings file.
*/
struct nhlt_format_config {
int num_channels;
int sample_freq_khz;
int container_bits_per_sample;
int valid_bits_per_sample;
u32 speaker_mask;
const char *settings_file;
};
/* Arbitrary max number of formats per endpoint. */
#define MAX_FORMATS 2
struct nhlt_endpoint {
u32 length;
u8 link_type;
u8 instance_id;
u16 vendor_id;
u16 device_id;
u16 revision_id;
u32 subsystem_id;
u8 device_type;
u8 direction;
u8 virtual_bus_id;
struct nhlt_specific_config config;
u8 num_formats;
struct nhlt_format formats[MAX_FORMATS];
};
#define MAX_ENDPOINTS 8
struct nhlt {
u32 subsystem_id;
u8 num_endpoints;
struct nhlt_endpoint endpoints[MAX_ENDPOINTS];
u8 current_instance_id[NHLT_MAX_LINK_TYPES];
};
struct nhlt_tdm_config {
u8 virtual_slot;
u8 config_type;
};
enum {
NHLT_TDM_BASIC,
NHLT_TDM_MIC_ARRAY,
};
struct nhlt_dmic_array_config {
struct nhlt_tdm_config tdm_config;
u8 array_type;
};
/*
* Microphone array definitions may be found here:
* https://msdn.microsoft.com/en-us/library/windows/hardware/dn613960%28v=vs.85%29.aspx
*/
enum {
NHLT_MIC_ARRAY_2CH_SMALL = 0xa,
NHLT_MIC_ARRAY_2CH_BIG = 0xb,
NHLT_MIC_ARRAY_4CH_1ST_GEOM = 0xc,
NHLT_MIC_ARRAY_4CH_L_SHAPED = 0xd,
NHLT_MIC_ARRAY_4CH_2ND_GEOM = 0xe,
NHLT_MIC_ARRAY_VENDOR_DEFINED = 0xf,
};
#endif

1
arch/x86/lib/Makefile
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@ -22,6 +22,7 @@ obj-y += init_helpers.o
obj-y += interrupts.o
obj-y += lpc-uclass.o
obj-y += mpspec.o
obj-$(CONFIG_$(SPL_TPL_)ACPIGEN) += acpi_nhlt.o
obj-y += northbridge-uclass.o
obj-$(CONFIG_I8259_PIC) += i8259.o
obj-$(CONFIG_I8254_TIMER) += i8254.o

482
arch/x86/lib/acpi_nhlt.c Normal file
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@ -0,0 +1,482 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2020 Google LLC
*
* Modified from coreboot nhlt.c
*/
#define LOG_CATEGORY LOGC_ACPI
#include <common.h>
#include <binman.h>
#include <dm.h>
#include <log.h>
#include <malloc.h>
#include <tables_csum.h>
#include <acpi/acpi_table.h>
#include <asm/acpi_nhlt.h>
#include <asm/unaligned.h>
#include <dm/acpi.h>
#define NHLT_RID 1
#define NHLT_SSID 1
#define WAVEFORMAT_TAG 0xfffe
#define DEFAULT_VIRTUAL_BUS_ID 0
static const struct sub_format pcm_subformat = {
.data1 = 0x00000001,
.data2 = 0x0000,
.data3 = 0x0010,
.data4 = { 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 },
};
struct nhlt *nhlt_init(void)
{
struct nhlt *nhlt;
nhlt = malloc(sizeof(*nhlt));
if (!nhlt)
return NULL;
memset(nhlt, 0, sizeof(*nhlt));
nhlt->subsystem_id = NHLT_SSID;
return nhlt;
}
struct nhlt_endpoint *nhlt_add_endpoint(struct nhlt *nhlt, int link_type,
int device_type, int dir,
u16 vid, u16 did)
{
struct nhlt_endpoint *endp;
if (link_type < NHLT_LINK_HDA || link_type >= NHLT_MAX_LINK_TYPES)
return NULL;
if (nhlt->num_endpoints >= MAX_ENDPOINTS)
return NULL;
endp = &nhlt->endpoints[nhlt->num_endpoints];
endp->link_type = link_type;
endp->instance_id = nhlt->current_instance_id[link_type];
endp->vendor_id = vid;
endp->device_id = did;
endp->revision_id = NHLT_RID;
endp->subsystem_id = nhlt->subsystem_id;
endp->device_type = device_type;
endp->direction = dir;
endp->virtual_bus_id = DEFAULT_VIRTUAL_BUS_ID;
nhlt->num_endpoints++;
return endp;
}
static int append_specific_config(struct nhlt_specific_config *spec_cfg,
const void *config, size_t config_sz)
{
size_t new_sz;
void *new_cfg;
new_sz = spec_cfg->size + config_sz;
new_cfg = malloc(new_sz);
if (!new_cfg)
return -ENOMEM;
/* Append new config */
memcpy(new_cfg, spec_cfg->capabilities, spec_cfg->size);
memcpy(new_cfg + spec_cfg->size, config, config_sz);
free(spec_cfg->capabilities);
/* Update with new config data */
spec_cfg->size = new_sz;
spec_cfg->capabilities = new_cfg;
return 0;
}
int nhlt_endpoint_append_config(struct nhlt_endpoint *endp, const void *config,
size_t config_sz)
{
return append_specific_config(&endp->config, config, config_sz);
}
struct nhlt_format *nhlt_add_format(struct nhlt_endpoint *endp,
int num_channels, int sample_freq_khz,
int container_bits_per_sample,
int valid_bits_per_sample,
uint32_t speaker_mask)
{
struct nhlt_format *fmt;
struct nhlt_waveform *wave;
if (endp->num_formats >= MAX_FORMATS)
return NULL;
fmt = &endp->formats[endp->num_formats];
wave = &fmt->waveform;
wave->tag = WAVEFORMAT_TAG;
wave->num_channels = num_channels;
wave->samples_per_second = sample_freq_khz * 1000;
wave->bits_per_sample = container_bits_per_sample;
wave->extra_size = sizeof(wave->valid_bits_per_sample);
wave->extra_size += sizeof(wave->channel_mask);
wave->extra_size += sizeof(wave->sub_format);
wave->valid_bits_per_sample = valid_bits_per_sample;
wave->channel_mask = speaker_mask;
memcpy(&wave->sub_format, &pcm_subformat, sizeof(wave->sub_format));
/* Calculate the dervied fields */
wave->block_align = wave->num_channels * wave->bits_per_sample / 8;
wave->bytes_per_second = wave->block_align * wave->samples_per_second;
endp->num_formats++;
return fmt;
}
int nhlt_format_append_config(struct nhlt_format *fmt, const void *config,
size_t config_sz)
{
return append_specific_config(&fmt->config, config, config_sz);
}
int nhlt_endpoint_add_formats(struct nhlt_endpoint *endp,
const struct nhlt_format_config *formats,
size_t num_formats)
{
ofnode node;
size_t i;
node = binman_section_find_node("private-files");
for (i = 0; i < num_formats; i++) {
const struct nhlt_format_config *cfg = &formats[i];
struct nhlt_format *fmt;
void *data;
int size;
int ret;
fmt = nhlt_add_format(endp, cfg->num_channels,
cfg->sample_freq_khz,
cfg->container_bits_per_sample,
cfg->valid_bits_per_sample,
cfg->speaker_mask);
if (!fmt)
return -ENOSPC;
if (!cfg->settings_file)
continue;
ret = binman_entry_map(node, cfg->settings_file, &data, &size);
if (ret) {
log_warning("Failed to find settings file %s\n",
cfg->settings_file);
return log_msg_ret("settings", ret);
}
ret = nhlt_format_append_config(fmt, data, size);
if (ret)
return log_msg_ret("append", ret);
}
return 0;
}
void nhlt_next_instance(struct nhlt *nhlt, int link_type)
{
if (link_type < NHLT_LINK_HDA || link_type >= NHLT_MAX_LINK_TYPES)
return;
nhlt->current_instance_id[link_type]++;
}
static size_t calc_specific_config_size(struct nhlt_specific_config *cfg)
{
return sizeof(cfg->size) + cfg->size;
}
static size_t calc_format_size(struct nhlt_format *fmt)
{
size_t sz = 0;
/* Wave format first */
sz += sizeof(fmt->waveform.tag);
sz += sizeof(fmt->waveform.num_channels);
sz += sizeof(fmt->waveform.samples_per_second);
sz += sizeof(fmt->waveform.bytes_per_second);
sz += sizeof(fmt->waveform.block_align);
sz += sizeof(fmt->waveform.bits_per_sample);
sz += sizeof(fmt->waveform.extra_size);
sz += sizeof(fmt->waveform.valid_bits_per_sample);
sz += sizeof(fmt->waveform.channel_mask);
sz += sizeof(fmt->waveform.sub_format);
sz += calc_specific_config_size(&fmt->config);
return sz;
}
static size_t calc_endpoint_size(struct nhlt_endpoint *endp)
{
int i;
size_t sz = 0;
sz += sizeof(endp->length) + sizeof(endp->link_type);
sz += sizeof(endp->instance_id) + sizeof(endp->vendor_id);
sz += sizeof(endp->device_id) + sizeof(endp->revision_id);
sz += sizeof(endp->subsystem_id) + sizeof(endp->device_type);
sz += sizeof(endp->direction) + sizeof(endp->virtual_bus_id);
sz += calc_specific_config_size(&endp->config);
sz += sizeof(endp->num_formats);
for (i = 0; i < endp->num_formats; i++)
sz += calc_format_size(&endp->formats[i]);
/* Adjust endpoint length to reflect current configuration */
endp->length = sz;
return sz;
}
static size_t calc_endpoints_size(struct nhlt *nhlt)
{
size_t sz = 0;
int i;
for (i = 0; i < nhlt->num_endpoints; i++)
sz += calc_endpoint_size(&nhlt->endpoints[i]);
return sz;
}
static size_t calc_size(struct nhlt *nhlt)
{
return sizeof(nhlt->num_endpoints) + calc_endpoints_size(nhlt);
}
size_t nhlt_current_size(struct nhlt *nhlt)
{
return calc_size(nhlt) + sizeof(struct acpi_table_header);
}
static void nhlt_free_resources(struct nhlt *nhlt)
{
int i, j;
/* Free all specific configs */
for (i = 0; i < nhlt->num_endpoints; i++) {
struct nhlt_endpoint *endp = &nhlt->endpoints[i];
free(endp->config.capabilities);
for (j = 0; j < endp->num_formats; j++) {
struct nhlt_format *fmt = &endp->formats[j];
free(fmt->config.capabilities);
}
}
/* Free nhlt object proper */
free(nhlt);
}
struct cursor {
u8 *buf;
};
static void ser8(struct cursor *cur, uint val)
{
*cur->buf = val;
cur->buf += sizeof(val);
}
static void ser16(struct cursor *cur, uint val)
{
put_unaligned_le16(val, cur->buf);
cur->buf += sizeof(val);
}
static void ser32(struct cursor *cur, uint val)
{
put_unaligned_le32(val, cur->buf);
cur->buf += sizeof(val);
}
static void serblob(struct cursor *cur, void *from, size_t sz)
{
memcpy(cur->buf, from, sz);
cur->buf += sz;
}
static void serialise_specific_config(struct nhlt_specific_config *cfg,
struct cursor *cur)
{
ser32(cur, cfg->size);
serblob(cur, cfg->capabilities, cfg->size);
}
static void serialise_waveform(struct nhlt_waveform *wave, struct cursor *cur)
{
ser16(cur, wave->tag);
ser16(cur, wave->num_channels);
ser32(cur, wave->samples_per_second);
ser32(cur, wave->bytes_per_second);
ser16(cur, wave->block_align);
ser16(cur, wave->bits_per_sample);
ser16(cur, wave->extra_size);
ser16(cur, wave->valid_bits_per_sample);
ser32(cur, wave->channel_mask);
ser32(cur, wave->sub_format.data1);
ser16(cur, wave->sub_format.data2);
ser16(cur, wave->sub_format.data3);
serblob(cur, wave->sub_format.data4, sizeof(wave->sub_format.data4));
}
static void serialise_format(struct nhlt_format *fmt, struct cursor *cur)
{
serialise_waveform(&fmt->waveform, cur);
serialise_specific_config(&fmt->config, cur);
}
static void serialise_endpoint(struct nhlt_endpoint *endp, struct cursor *cur)
{
int i;
ser32(cur, endp->length);
ser8(cur, endp->link_type);
ser8(cur, endp->instance_id);
ser16(cur, endp->vendor_id);
ser16(cur, endp->device_id);
ser16(cur, endp->revision_id);
ser32(cur, endp->subsystem_id);
ser8(cur, endp->device_type);
ser8(cur, endp->direction);
ser8(cur, endp->virtual_bus_id);
serialise_specific_config(&endp->config, cur);
ser8(cur, endp->num_formats);
for (i = 0; i < endp->num_formats; i++)
serialise_format(&endp->formats[i], cur);
}
static void nhlt_serialise_endpoints(struct nhlt *nhlt, struct cursor *cur)
{
int i;
ser8(cur, nhlt->num_endpoints);
for (i = 0; i < nhlt->num_endpoints; i++)
serialise_endpoint(&nhlt->endpoints[i], cur);
}
int nhlt_serialise_oem_overrides(struct acpi_ctx *ctx, struct nhlt *nhlt,
const char *oem_id, const char *oem_table_id,
uint32_t oem_revision)
{
struct cursor cur;
struct acpi_table_header *header;
size_t sz;
size_t oem_id_len;
size_t oem_table_id_len;
int ret;
log_info("ACPI: * NHLT\n");
sz = nhlt_current_size(nhlt);
/* Create header */
header = (void *)ctx->current;
memset(header, '\0', sizeof(struct acpi_table_header));
acpi_fill_header(header, "NHLT");
header->length = sz;
header->revision = acpi_get_table_revision(ACPITAB_NHLT);
if (oem_id) {
oem_id_len = min((int)strlen(oem_id), 6);
memcpy(header->oem_id, oem_id, oem_id_len);
}
if (oem_table_id) {
oem_table_id_len = min((int)strlen(oem_table_id), 8);
memcpy(header->oem_table_id, oem_table_id, oem_table_id_len);
}
header->oem_revision = oem_revision;
cur.buf = (void *)(header + 1);
nhlt_serialise_endpoints(nhlt, &cur);
header->checksum = table_compute_checksum(header, sz);
nhlt_free_resources(nhlt);
ret = acpi_add_table(ctx, ctx->current);
if (ret)
return log_msg_ret("add", ret);
acpi_inc_align(ctx, sz);
return 0;
}
static int _nhlt_add_single_endpoint(struct nhlt *nhlt, int virtual_bus_id,
const struct nhlt_endp_descriptor *epd)
{
struct nhlt_endpoint *endp;
int ret;
endp = nhlt_add_endpoint(nhlt, epd->link, epd->device, epd->direction,
epd->vid, epd->did);
if (!endp)
return -EINVAL;
endp->virtual_bus_id = virtual_bus_id;
ret = nhlt_endpoint_append_config(endp, epd->cfg, epd->cfg_size);
if (ret)
return ret;
ret = nhlt_endpoint_add_formats(endp, epd->formats, epd->num_formats);
if (ret)
return log_msg_ret("formats", ret);
return 0;
}
static int _nhlt_add_endpoints(struct nhlt *nhlt, int virtual_bus_id,
const struct nhlt_endp_descriptor *epds,
size_t num_epds)
{
size_t i;
int ret;
for (i = 0; i < num_epds; i++) {
ret = _nhlt_add_single_endpoint(nhlt, virtual_bus_id, &epds[i]);
if (ret)
return log_ret(ret);
}
return 0;
}
int nhlt_add_endpoints(struct nhlt *nhlt,
const struct nhlt_endp_descriptor *epds, size_t num_epds)
{
int ret;
ret = _nhlt_add_endpoints(nhlt, DEFAULT_VIRTUAL_BUS_ID, epds, num_epds);
return ret;
}
int nhlt_add_ssp_endpoints(struct nhlt *nhlt, int virtual_bus_id,
const struct nhlt_endp_descriptor *epds,
size_t num_epds)
{
int ret;
ret = _nhlt_add_endpoints(nhlt, virtual_bus_id, epds, num_epds);
if (!ret)
nhlt_next_instance(nhlt, NHLT_LINK_SSP);
return ret;
}