ASoC: codecs: lpass-macro: add helpers to get codec version

LPASS Digital codec have changes in register layout across multiple
versions. Add a proper way read the codec version allowint all the lpass
macro drivers (tx, rx, wsa, va) to configure the registers correctly.

LPASS VA macro has the required registers to read the codec version.
Read the the version and make it available to other lpass codec macros
using the common helper functions.

Existing method of using LPASS IP version is not accurate as the same
the codec versioning is totally independent of LPASS IP block versions.

These helper functions should be able to provide a convient way to get
the codec version, and will help scale the drivers in right direction.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Tested-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8650-HDK
Link: https://lore.kernel.org/r/20240612-lpass-codec-v25-v4-1-f63d3676dbc4@linaro.orgSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/lpass-macro-common.c

@@ -11,6 +11,9 @@
 
 #include "lpass-macro-common.h"
 
+static DEFINE_MUTEX(lpass_codec_mutex);
+static int lpass_codec_version;
+
 struct lpass_macro *lpass_macro_pds_init(struct device *dev)
 {
 	struct lpass_macro *l_pds;
@@ -66,5 +69,25 @@ void lpass_macro_pds_exit(struct lpass_macro *pds)
 }
 EXPORT_SYMBOL_GPL(lpass_macro_pds_exit);
 
+void lpass_macro_set_codec_version(int version)
+{
+	mutex_lock(&lpass_codec_mutex);
+	lpass_codec_version = version;
+	mutex_unlock(&lpass_codec_mutex);
+}
+EXPORT_SYMBOL_GPL(lpass_macro_set_codec_version);
+
+int lpass_macro_get_codec_version(void)
+{
+	int ver;
+
+	mutex_lock(&lpass_codec_mutex);
+	ver = lpass_codec_version;
+	mutex_unlock(&lpass_codec_mutex);
+
+	return ver;
+}
+EXPORT_SYMBOL_GPL(lpass_macro_get_codec_version);
+
 MODULE_DESCRIPTION("Common macro driver");
 MODULE_LICENSE("GPL");

sound/soc/codecs/lpass-macro-common.h

@@ -18,6 +18,18 @@ enum lpass_version {
 	LPASS_VER_11_0_0,
 };
 
+enum lpass_codec_version {
+	LPASS_CODEC_VERSION_1_0 = 1,
+	LPASS_CODEC_VERSION_1_1,
+	LPASS_CODEC_VERSION_1_2,
+	LPASS_CODEC_VERSION_2_0,
+	LPASS_CODEC_VERSION_2_1,
+	LPASS_CODEC_VERSION_2_5,
+	LPASS_CODEC_VERSION_2_6,
+	LPASS_CODEC_VERSION_2_7,
+	LPASS_CODEC_VERSION_2_8,
+};
+
 struct lpass_macro {
 	struct device *macro_pd;
 	struct device *dcodec_pd;
@@ -25,5 +37,28 @@ struct lpass_macro {
 
 struct lpass_macro *lpass_macro_pds_init(struct device *dev);
 void lpass_macro_pds_exit(struct lpass_macro *pds);
+void lpass_macro_set_codec_version(int version);
+int lpass_macro_get_codec_version(void);
+
+static inline const char *lpass_macro_get_codec_version_string(int version)
+{
+	switch (version) {
+	case LPASS_CODEC_VERSION_2_0:
+		return "v2.0";
+	case LPASS_CODEC_VERSION_2_1:
+		return "v2.1";
+	case LPASS_CODEC_VERSION_2_5:
+		return "v2.5";
+	case LPASS_CODEC_VERSION_2_6:
+		return "v2.6";
+	case LPASS_CODEC_VERSION_2_7:
+		return "v2.7";
+	case LPASS_CODEC_VERSION_2_8:
+		return "v2.8";
+	default:
+		break;
+	}
+	return "NA";
+}
 
 #endif /* __LPASS_MACRO_COMMON_H__ */

sound/soc/codecs/lpass-va-macro.c

@@ -1461,6 +1461,32 @@ static int va_macro_validate_dmic_sample_rate(u32 dmic_sample_rate,
 	return dmic_sample_rate;
 }
 
+static void va_macro_set_lpass_codec_version(struct va_macro *va)
+{
+	int core_id_0 = 0, core_id_1 = 0, core_id_2 = 0, version;
+
+	regmap_read(va->regmap, CDC_VA_TOP_CSR_CORE_ID_0, &core_id_0);
+	regmap_read(va->regmap, CDC_VA_TOP_CSR_CORE_ID_1, &core_id_1);
+	regmap_read(va->regmap, CDC_VA_TOP_CSR_CORE_ID_2, &core_id_2);
+
+	if ((core_id_0 == 0x01) && (core_id_1 == 0x0F))
+		version = LPASS_CODEC_VERSION_2_0;
+	if ((core_id_0 == 0x02) && (core_id_1 == 0x0E))
+		version = LPASS_CODEC_VERSION_2_1;
+	if ((core_id_0 == 0x02) && (core_id_1 == 0x0F) && (core_id_2 == 0x50 || core_id_2 == 0x51))
+		version = LPASS_CODEC_VERSION_2_5;
+	if ((core_id_0 == 0x02) && (core_id_1 == 0x0F) && (core_id_2 == 0x60 || core_id_2 == 0x61))
+		version = LPASS_CODEC_VERSION_2_6;
+	if ((core_id_0 == 0x02) && (core_id_1 == 0x0F) && (core_id_2 == 0x70 || core_id_2 == 0x71))
+		version = LPASS_CODEC_VERSION_2_7;
+	if ((core_id_0 == 0x02) && (core_id_1 == 0x0F) && (core_id_2 == 0x80 || core_id_2 == 0x81))
+		version = LPASS_CODEC_VERSION_2_8;
+
+	lpass_macro_set_codec_version(version);
+
+	dev_dbg(va->dev, "LPASS Codec Version %s\n", lpass_macro_get_codec_version_string(version));
+}
+
 static int va_macro_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -1554,6 +1580,8 @@ static int va_macro_probe(struct platform_device *pdev)
 			goto err_npl;
 	}
 
+	va_macro_set_lpass_codec_version(va);
+
 	if (va->has_swr_master) {
 		/* Set default CLK div to 1 */
 		regmap_update_bits(va->regmap, CDC_VA_TOP_CSR_SWR_MIC_CTL0,