ASoC: SOF: Intel: add build support for SoundWire

Select SoundWire capabilities on newer Intel platforms, starting with
CannonLake/CoffeeLake/CometLake.

As done for HDaudio, the SoundWire link is an opt-in capability. We
explicitly test for ACPI to avoid warnings on unmet dependencies on
the SoundWire side.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20200819124429.3785-1-yung-chuan.liao@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/intel/Kconfig

@@ -166,6 +166,7 @@ config SND_SOC_SOF_CANNONLAKE_SUPPORT
 config SND_SOC_SOF_CANNONLAKE
 	tristate
 	select SND_SOC_SOF_HDA_COMMON
+	select SND_SOC_SOF_INTEL_SOUNDWIRE_LINK_BASELINE
 	help
 	  This option is not user-selectable but automagically handled by
 	  'select' statements at a higher level
@@ -181,6 +182,7 @@ config SND_SOC_SOF_COFFEELAKE_SUPPORT
 config SND_SOC_SOF_COFFEELAKE
 	tristate
 	select SND_SOC_SOF_HDA_COMMON
+	select SND_SOC_SOF_INTEL_SOUNDWIRE_LINK_BASELINE
 	help
 	  This option is not user-selectable but automagically handled by
 	  'select' statements at a higher level
@@ -196,13 +198,15 @@ config SND_SOC_SOF_ICELAKE_SUPPORT
 config SND_SOC_SOF_ICELAKE
 	tristate
 	select SND_SOC_SOF_HDA_COMMON
+	select SND_SOC_SOF_INTEL_SOUNDWIRE_LINK_BASELINE
 	help
 	  This option is not user-selectable but automagically handled by
 	  'select' statements at a higher level
 
 config SND_SOC_SOF_COMETLAKE
 	tristate
 	select SND_SOC_SOF_HDA_COMMON
+	select SND_SOC_SOF_INTEL_SOUNDWIRE_LINK_BASELINE
 	help
 	  This option is not user-selectable but automagically handled by
 	  'select' statements at a higher level
@@ -229,6 +233,7 @@ config SND_SOC_SOF_TIGERLAKE_SUPPORT
 config SND_SOC_SOF_TIGERLAKE
 	tristate
 	select SND_SOC_SOF_HDA_COMMON
+	select SND_SOC_SOF_INTEL_SOUNDWIRE_LINK_BASELINE
 	help
 	  This option is not user-selectable but automagically handled by
 	  'select' statements at a higher level
@@ -244,6 +249,7 @@ config SND_SOC_SOF_ELKHARTLAKE_SUPPORT
 config SND_SOC_SOF_ELKHARTLAKE
 	tristate
 	select SND_SOC_SOF_HDA_COMMON
+	select SND_SOC_SOF_INTEL_SOUNDWIRE_LINK_BASELINE
 	help
 	  This option is not user-selectable but automagically handled by
 	  'select' statements at a higher level
@@ -329,6 +335,29 @@ config SND_SOC_SOF_HDA
 	  This option is not user-selectable but automagically handled by
 	  'select' statements at a higher level
 
+config SND_SOC_SOF_INTEL_SOUNDWIRE_LINK
+	bool "SOF support for SoundWire"
+	depends on SOUNDWIRE && ACPI
+	help
+	  This adds support for SoundWire with Sound Open Firmware
+		  for Intel(R) platforms.
+	  Say Y if you want to enable SoundWire links with SOF.
+	  If unsure select "N".
+
+config SND_SOC_SOF_INTEL_SOUNDWIRE_LINK_BASELINE
+	tristate
+	select SND_SOC_SOF_INTEL_SOUNDWIRE if SND_SOC_SOF_INTEL_SOUNDWIRE_LINK
+	help
+	  This option is not user-selectable but automagically handled by
+	  'select' statements at a higher level
+
+config SND_SOC_SOF_INTEL_SOUNDWIRE
+	tristate
+	select SOUNDWIRE_INTEL
+	help
+	  This option is not user-selectable but automagically handled by
+	  'select' statements at a higher level
+
 endif ## SND_SOC_SOF_INTEL_PCI
 
 endif ## SND_SOC_SOF_INTEL_TOPLEVEL