ASoC: codecs: Add WCD939x Codec driver

Add the main WCD9390/WCD9395 Audio Codec driver to support:
- 4 ADC inputs for up to 5 Analog Microphones
- 4 DMIC inputs for up to 8 Digital Microphones
- 4 Microphone BIAS
- Stereo Headphone output
- Mono EAR output
- MBHC engine for Headset Detection

It makes usage of the generic MBHC and CLSH generic code and
the USB Type-C mux and switch helpers to gather USB-C Events
in order to properly setup Headset Detection mechanism
when connected behind the separate USB-C Mux subsystem.

WCD9390/WCD9395 supports a PCM path for Playback instead
of the actually implemented PDM playback, it will be
implemented later.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://msgid.link/r/20231219-topic-sm8650-upstream-wcd939x-codec-v4-5-1c3bbff2d7ab@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/Kconfig

@@ -2060,8 +2060,17 @@ config SND_SOC_WCD938X_SDW
 	  The WCD9380/9385 is a audio codec IC Integrated in
 	  Qualcomm SoCs like SM8250.
 
+config SND_SOC_WCD939X
+	depends on SND_SOC_WCD939X_SDW
+	tristate
+	depends on SOUNDWIRE || !SOUNDWIRE
+	depends on TYPEC || !TYPEC
+	select SND_SOC_WCD_CLASSH
+
 config SND_SOC_WCD939X_SDW
 	tristate "WCD9390/WCD9395 Codec - SDW"
+	select SND_SOC_WCD939X
+	select SND_SOC_WCD_MBHC
 	select REGMAP_IRQ
 	depends on SOUNDWIRE
 	select REGMAP_SOUNDWIRE

sound/soc/codecs/Makefile

@@ -313,6 +313,7 @@ snd-soc-wcd9335-objs := wcd9335.o
 snd-soc-wcd934x-objs := wcd934x.o
 snd-soc-wcd938x-objs := wcd938x.o
 snd-soc-wcd938x-sdw-objs := wcd938x-sdw.o
+snd-soc-wcd939x-objs := wcd939x.o
 snd-soc-wcd939x-sdw-objs := wcd939x-sdw.o
 snd-soc-wl1273-objs := wl1273.o
 snd-soc-wm-adsp-objs := wm_adsp.o
@@ -704,6 +705,11 @@ ifdef CONFIG_SND_SOC_WCD938X_SDW
 # avoid link failure by forcing sdw code built-in when needed
 obj-$(CONFIG_SND_SOC_WCD938X) += snd-soc-wcd938x-sdw.o
 endif
+obj-$(CONFIG_SND_SOC_WCD939X)	+= snd-soc-wcd939x.o
+ifdef CONFIG_SND_SOC_WCD939X_SDW
+# avoid link failure by forcing sdw code built-in when needed
+obj-$(CONFIG_SND_SOC_WCD939X) += snd-soc-wcd939x-sdw.o
+endif
 obj-$(CONFIG_SND_SOC_WL1273)	+= snd-soc-wl1273.o
 obj-$(CONFIG_SND_SOC_WM0010)	+= snd-soc-wm0010.o
 obj-$(CONFIG_SND_SOC_WM1250_EV1) += snd-soc-wm1250-ev1.o

sound/soc/codecs/wcd-clsh-v2.h

@@ -47,6 +47,7 @@ enum wcd_codec_version {
 	/* New CLSH after this */
 	WCD937X  = 2,
 	WCD938X  = 3,
+	WCD939X  = 4,
 };
 struct wcd_clsh_ctrl;