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-rw-r--r--sound/hda/intel-nhlt.c345
1 files changed, 345 insertions, 0 deletions
diff --git a/sound/hda/intel-nhlt.c b/sound/hda/intel-nhlt.c
new file mode 100644
index 0000000000..696a958d93
--- /dev/null
+++ b/sound/hda/intel-nhlt.c
@@ -0,0 +1,345 @@
+// 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);