linux-kernel - [RFC PATCH 05/12] ASoC: SOF: Intel: add build support for SoundWire

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Date:   Mon, 16 Sep 2019 16:42:44 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     alsa-devel@...a-project.org
Cc:     linux-kernel@...r.kernel.org, tiwai@...e.de, broonie@...nel.org,
        vkoul@...nel.org, gregkh@...uxfoundation.org, jank@...ence.com,
        srinivas.kandagatla@...aro.org, slawomir.blauciak@...el.com,
        Bard liao <yung-chuan.liao@...ux.intel.com>,
        Rander Wang <rander.wang@...ux.intel.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Pan Xiuli <xiuli.pan@...ux.intel.com>,
        Guennadi Liakhovetski <guennadi.liakhovetski@...ux.intel.com>
Subject: [RFC PATCH 05/12] 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@...ux.intel.com>
---
 sound/soc/sof/intel/Kconfig | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/sound/soc/sof/intel/Kconfig b/sound/soc/sof/intel/Kconfig
index 479ba249e219..1adff7be5b40 100644
--- a/sound/soc/sof/intel/Kconfig
+++ b/sound/soc/sof/intel/Kconfig
@@ -150,6 +150,7 @@ config SND_SOC_SOF_CANNONLAKE_SUPPORT
 config SND_SOC_SOF_CANNONLAKE
 	tristate
 	select SND_SOC_SOF_HDA_COMMON
+	select SND_SOC_SOF_INTEL_SOUNDWIRE
 	help
 	  This option is not user-selectable but automagically handled by
 	  'select' statements at a higher level
@@ -165,6 +166,7 @@ config SND_SOC_SOF_COFFEELAKE_SUPPORT
 config SND_SOC_SOF_COFFEELAKE
 	tristate
 	select SND_SOC_SOF_HDA_COMMON
+	select SND_SOC_SOF_INTEL_SOUNDWIRE
 	help
 	  This option is not user-selectable but automagically handled by
 	  'select' statements at a higher level
@@ -180,6 +182,7 @@ config SND_SOC_SOF_ICELAKE_SUPPORT
 config SND_SOC_SOF_ICELAKE
 	tristate
 	select SND_SOC_SOF_HDA_COMMON
+	select SND_SOC_SOF_INTEL_SOUNDWIRE
 	help
 	  This option is not user-selectable but automagically handled by
 	  'select' statements at a higher level
@@ -187,6 +190,7 @@ config SND_SOC_SOF_ICELAKE
 config SND_SOC_SOF_COMETLAKE_LP
 	tristate
 	select SND_SOC_SOF_HDA_COMMON
+	select SND_SOC_SOF_INTEL_SOUNDWIRE
 	help
 	  This option is not user-selectable but automagically handled by
 	  'select' statements at a higher level
@@ -202,6 +206,7 @@ config SND_SOC_SOF_COMETLAKE_LP_SUPPORT
 config SND_SOC_SOF_COMETLAKE_H
 	tristate
 	select SND_SOC_SOF_HDA_COMMON
+	select SND_SOC_SOF_INTEL_SOUNDWIRE
 	help
 	  This option is not user-selectable but automagically handled by
 	  'select' statements at a higher level
@@ -225,6 +230,7 @@ config SND_SOC_SOF_TIGERLAKE_SUPPORT
 config SND_SOC_SOF_TIGERLAKE
 	tristate
 	select SND_SOC_SOF_HDA_COMMON
+	select SND_SOC_SOF_INTEL_SOUNDWIRE
 	help
           This option is not user-selectable but automagically handled by
 	  'select' statements at a higher level
@@ -240,6 +246,7 @@ config SND_SOC_SOF_ELKHARTLAKE_SUPPORT
 config SND_SOC_SOF_ELKHARTLAKE
 	tristate
 	select SND_SOC_SOF_HDA_COMMON
+	select SND_SOC_SOF_INTEL_SOUNDWIRE
 	help
           This option is not user-selectable but automagically handled by
 	  'select' statements at a higher level
@@ -291,6 +298,22 @@ 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
+	tristate
+	select SOUNDWIRE_INTEL if SND_SOC_SOF_INTEL_SOUNDWIRE_LINK
+	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
-- 
2.20.1