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.org
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 23 insertions, 0 deletions

diff --git a/sound/soc/codecs/lpass-macro-common.c b/sound/soc/codecs/lpass-macro-common.c
index da1b422250b8..8b038a99a8f9 100644
--- a/sound/soc/codecs/lpass-macro-common.c
+++ b/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");