drivers/soundwire: Support Realtek ALC722 codec

This patch adds SoundWire driver to support ALC722 audio codec.

The existing ALC711 codec driver is refactored to include support for
ALC722 device based on config flag.

The ACPI address for the codec is calculated with the information in
the codec driver combined with the devicetree.cb hierarchy where the
link and unique IDs are extracted from the device path.

For example this device is connected to master link ID 0 and has strap
settings configuring it for unique ID 1:

chip drivers/soundwire/alc711
  register "desc" = ""Headset Codec""
  device generic 0.1 on end
end

reference datasheet: Realtek ALC722-CG ver. 0.56

TEST=This driver was tested on Intel RVP with on board ALC722 codec
by booting and disassembling the runtime SSDT to ensure that the
devices have the expected address and properties. Test soundcard
binding works and devices are detected and check for audio playback
using speaker output.

Signed-off-by: Anil Kumar <anil.kumar.k@intel.com>
Change-Id: Ieb16a1c6f3a79321fdc35987468daa8be33b6e49
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81920
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>

3 files changed, 31 insertions, 3 deletions

diff --git a/src/drivers/soundwire/alc711/Kconfig b/src/drivers/soundwire/alc711/Kconfig
index 0d96fa96bb..96ed819d7f 100644
--- a/src/drivers/soundwire/alc711/Kconfig
+++ b/src/drivers/soundwire/alc711/Kconfig
@@ -1,4 +1,18 @@
 ## SPDX-License-Identifier: GPL-2.0-only
 
+config DRIVERS_SOUNDWIRE_ALC_BASE_7XX
+	bool
+	help
+	  Base code for Realtek ALC7xxx Codec SoundWire driver.
+
 config DRIVERS_SOUNDWIRE_ALC711
 	bool
+	select DRIVERS_SOUNDWIRE_ALC_BASE_7XX
+	help
+	  SoundWire driver for Realtek ALC711 device
+
+config DRIVERS_SOUNDWIRE_ALC722
+	bool
+	select DRIVERS_SOUNDWIRE_ALC_BASE_7XX
+	help
+	  SoundWire driver for Realtek ALC722 device
diff --git a/src/drivers/soundwire/alc711/Makefile.mk b/src/drivers/soundwire/alc711/Makefile.mk
index 63e0993435..cdedc41582 100644
--- a/src/drivers/soundwire/alc711/Makefile.mk
+++ b/src/drivers/soundwire/alc711/Makefile.mk
@@ -1,3 +1,3 @@
 ## SPDX-License-Identifier: GPL-2.0-only
 
-ramstage-$(CONFIG_DRIVERS_SOUNDWIRE_ALC711) += alc711.c
+ramstage-$(CONFIG_DRIVERS_SOUNDWIRE_ALC_BASE_7XX) += alc711.c
diff --git a/src/drivers/soundwire/alc711/alc711.c b/src/drivers/soundwire/alc711/alc711.c
index 7d1ac4274f..c5e7a8e5b6 100644
--- a/src/drivers/soundwire/alc711/alc711.c
+++ b/src/drivers/soundwire/alc711/alc711.c
@@ -11,10 +11,18 @@
 #include "chip.h"
 
 static struct soundwire_address alc711_address = {
+#if CONFIG(DRIVERS_SOUNDWIRE_ALC722)
+	.version = SOUNDWIRE_VERSION_1_2,
+	.part_id = MIPI_DEV_ID_REALTEK_ALC722,
+	.class = MIPI_CLASS_SDCA,
+#elif CONFIG(DRIVERS_SOUNDWIRE_ALC711)
 	.version = SOUNDWIRE_VERSION_1_1,
-	.manufacturer_id = MIPI_MFG_ID_REALTEK,
 	.part_id = MIPI_DEV_ID_REALTEK_ALC711,
-	.class = MIPI_CLASS_NONE
+	.class = MIPI_CLASS_NONE,
+#else
+#error "No Realtek SoundWire codec selected"
+#endif
+	.manufacturer_id = MIPI_MFG_ID_REALTEK,
 };
 
 static struct soundwire_slave alc711_slave = {
@@ -150,6 +158,12 @@ static void soundwire_alc711_enable(struct device *dev)
 }
 
 struct chip_operations drivers_soundwire_alc711_ops = {
+#if CONFIG(DRIVERS_SOUNDWIRE_ALC711)
 	.name = "Realtek ALC711 SoundWire Codec",
+#elif CONFIG(DRIVERS_SOUNDWIRE_ALC722)
+	.name = "Realtek ALC722 SoundWire Codec",
+#else
+	.name = "Unknown",
+#endif
 	.enable_dev = soundwire_alc711_enable
 };