linux-kernel - [PATCH v3 3/6] ASoC: qcom: audioreach: add support for static calibration

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Message-ID: <20250818125055.1226708-4-srinivas.kandagatla@oss.qualcomm.com>
Date: Mon, 18 Aug 2025 13:50:52 +0100
From: srinivas.kandagatla@....qualcomm.com
To: broonie@...nel.org
Cc: perex@...ex.cz, tiwai@...e.com, srini@...nel.org, lgirdwood@...il.com,
        linux-sound@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, krzysztof.kozlowski@...aro.org,
        Srinivas Kandagatla <srinivas.kandagatla@....qualcomm.com>
Subject: [PATCH v3 3/6] ASoC: qcom: audioreach: add support for static calibration

From: Srinivas Kandagatla <srinivas.kandagatla@....qualcomm.com>

This change adds support for static calibration data via ASoC topology
file. This static calibration data could include binary blob of data
that is required by specific module and is not part of topology tokens.

Reason for adding this support is to allow loading module specific data
that can not be part of the tplg tokens, example, Echo and Noise cancelling
module needs a blob of calibration data to function correctly.

This support is also one of the building block for adding speaker
protection support.

Tested this with Single Mic ECNS(Echo and Noise Cancellation).

tplg can now contain this calibration data like:

SectionWidget."stream2.SMECNS_V224" {
	...
	data [
		...
		"stream2.SMECNS_V224_cfg_data"
	]
}

SectionData."stream2.SMECNS_V224_cfg_data" {
	words "0x00000330, 0x01001006,0x00000000,0x00000000,
		0x00004145,0x08001026,0x00000004,0x00000000,
		..."
	}
}

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@....qualcomm.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
 include/uapi/sound/snd_ar_tokens.h |  8 ++++++++
 sound/soc/qcom/qdsp6/audioreach.h  |  2 ++
 sound/soc/qcom/qdsp6/topology.c    | 31 ++++++++++++++++++++++++++++++
 3 files changed, 41 insertions(+)

diff --git a/include/uapi/sound/snd_ar_tokens.h b/include/uapi/sound/snd_ar_tokens.h
index 92cf72a6fdd4..3e18442d383a 100644
--- a/include/uapi/sound/snd_ar_tokens.h
+++ b/include/uapi/sound/snd_ar_tokens.h
@@ -238,4 +238,12 @@ enum ar_event_types {
 #define AR_TKN_U32_MODULE_LOG_TAP_POINT_ID	260
 #define AR_TKN_U32_MODULE_LOG_MODE		261
 
+#define SND_SOC_AR_TPLG_MODULE_CFG_TYPE 0x01001006
+struct audioreach_module_priv_data {
+	__le32 size;	/* size in bytes of the array, including all elements */
+	__le32 type;	/* SND_SOC_AR_TPLG_MODULE_CFG_TYPE */
+	__le32 priv[2];	/* Private data for future expansion */
+	__le32 data[0];	/* config data */
+};
+
 #endif /* __SND_AR_TOKENS_H__ */
diff --git a/sound/soc/qcom/qdsp6/audioreach.h b/sound/soc/qcom/qdsp6/audioreach.h
index 9b30177463e6..617bda051cf8 100644
--- a/sound/soc/qcom/qdsp6/audioreach.h
+++ b/sound/soc/qcom/qdsp6/audioreach.h
@@ -4,6 +4,7 @@
 #define __AUDIOREACH_H__
 #include <linux/types.h>
 #include <linux/soc/qcom/apr.h>
+#include <uapi/sound/snd_ar_tokens.h>
 #include <sound/soc.h>
 struct q6apm;
 struct q6apm_graph;
@@ -742,6 +743,7 @@ struct audioreach_module {
 	struct list_head node;
 	struct audioreach_container *container;
 	struct snd_soc_dapm_widget *widget;
+	struct audioreach_module_priv_data *data;
 };
 
 struct audioreach_module_config {
diff --git a/sound/soc/qcom/qdsp6/topology.c b/sound/soc/qcom/qdsp6/topology.c
index a3b0f558260c..ec51fabd98cb 100644
--- a/sound/soc/qcom/qdsp6/topology.c
+++ b/sound/soc/qcom/qdsp6/topology.c
@@ -305,6 +305,34 @@ static struct snd_soc_tplg_vendor_array *audioreach_get_module_array(
 	return NULL;
 }
 
+static struct audioreach_module_priv_data *audioreach_get_module_priv_data(
+		struct snd_soc_tplg_private *private)
+{
+	int sz;
+
+	for (sz = 0; sz < le32_to_cpu(private->size); ) {
+		struct snd_soc_tplg_vendor_array *mod_array;
+
+		mod_array = (struct snd_soc_tplg_vendor_array *)((u8 *)private->array + sz);
+		if (mod_array->type == SND_SOC_AR_TPLG_MODULE_CFG_TYPE) {
+			struct audioreach_module_priv_data *pdata;
+
+			pdata = kzalloc(struct_size(pdata, data, le32_to_cpu(mod_array->size)),
+				       GFP_KERNEL);
+			if (!pdata)
+				return ERR_PTR(-ENOMEM);
+
+			memcpy(pdata, ((u8 *)private->data + sz), struct_size(pdata, data,
+						le32_to_cpu(mod_array->size)));
+			return pdata;
+		}
+
+		sz = sz + le32_to_cpu(mod_array->size);
+	}
+
+	return NULL;
+}
+
 static struct audioreach_sub_graph *audioreach_parse_sg_tokens(struct q6apm *apm,
 						       struct snd_soc_tplg_private *private)
 {
@@ -582,6 +610,8 @@ static int audioreach_widget_load_module_common(struct snd_soc_component *compon
 	if (IS_ERR(mod))
 		return PTR_ERR(mod);
 
+	mod->data = audioreach_get_module_priv_data(&tplg_w->priv);
+
 	dobj = &w->dobj;
 	dobj->private = mod;
 
@@ -939,6 +969,7 @@ static int audioreach_widget_unload(struct snd_soc_component *scomp,
 	cont->num_modules--;
 
 	list_del(&mod->node);
+	kfree(mod->data);
 	kfree(mod);
 	/* Graph Info has N sub-graphs, sub-graph has N containers, Container has N Modules */
 	if (list_empty(&cont->modules_list)) { /* if no modules in the container then remove it */
-- 
2.50.0