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authorAmadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>2021-11-26 15:03:53 +0100
committerTakashi Iwai <tiwai@suse.de>2021-11-30 16:48:43 +0100
commit15fa179f3f45415696d376abc84e0098a9586b33 (patch)
tree571b683a03ff1621c1430f247ea0d05d9f5991cf /sound
parent6dd21ad81bf96478db3403b1bbe251c0612d0431 (diff)
ALSA: hda: Fill gaps in NHLT endpoint-interface
Two key operations missings are: endpoint presence-check and retrieval of matching endpoint hardware configuration (blob). Add operations for both use cases. Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com> Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com> Link: https://lore.kernel.org/r/20211126140355.1042684-2-cezary.rojewski@intel.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/hda/intel-nhlt.c102
1 files changed, 102 insertions, 0 deletions
diff --git a/sound/hda/intel-nhlt.c b/sound/hda/intel-nhlt.c
index e2237239d922..128476aa7c61 100644
--- a/sound/hda/intel-nhlt.c
+++ b/sound/hda/intel-nhlt.c
@@ -110,3 +110,105 @@ int intel_nhlt_get_dmic_geo(struct device *dev, struct nhlt_acpi_table *nhlt)
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);
+
+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)
+{
+ 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);
+
+ if (wfmt->channels == num_ch && wfmt->samples_per_sec == rate &&
+ 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;
+ 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);
+ 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);
+ if (cfg)
+ return cfg;
+ }
+
+ epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
+ }
+
+ return NULL;
+}
+EXPORT_SYMBOL(intel_nhlt_get_endpoint_blob);