ASoC: sdm660 audio changes

Enable compilation for sdm660 target.
Bring in sdm660_cdc codec driver.
Bring in sdm660 machine driver.
Update codec driver to component driver to align
with kernel-4.19 ALSA.

Change-Id: I927a032d077bcce6b3dcc4a95445e8b1e86d461a
Signed-off-by: Soumya Managoli <smanag@codeaurora.org>
diff --git a/asoc/codecs/msm_sdw/Kbuild b/asoc/codecs/msm_sdw/Kbuild
new file mode 100644
index 0000000..ccd515d
--- /dev/null
+++ b/asoc/codecs/msm_sdw/Kbuild
@@ -0,0 +1,109 @@
+# We can build either as part of a standalone Kernel build or as
+# an external module.  Determine which mechanism is being used
+ifeq ($(MODNAME),)
+	KERNEL_BUILD := 1
+else
+	KERNEL_BUILD := 0
+endif
+
+
+ifeq ($(KERNEL_BUILD), 1)
+	# These are configurable via Kconfig for kernel-based builds
+	# Need to explicitly configure for Android-based builds
+	AUDIO_BLD_DIR := $(shell pwd)/kernel/msm-4.19
+	AUDIO_ROOT := $(AUDIO_BLD_DIR)/techpack/audio
+endif
+
+ifeq ($(KERNEL_BUILD), 0)
+	ifeq ($(CONFIG_ARCH_SDM660), y)
+		include $(AUDIO_ROOT)/config/sdm660auto.conf
+		export
+		INCS    +=  -include $(AUDIO_ROOT)/config/sdm660autoconf.h
+	endif
+endif
+
+# As per target team, build is done as follows:
+# Defconfig : build with default flags
+# Slub      : defconfig  + CONFIG_SLUB_DEBUG := y +
+#	      CONFIG_SLUB_DEBUG_ON := y + CONFIG_PAGE_POISONING := y
+# Perf      : Using appropriate msmXXXX-perf_defconfig
+#
+# Shipment builds (user variants) should not have any debug feature
+# enabled. This is identified using 'TARGET_BUILD_VARIANT'. Slub builds
+# are identified using the CONFIG_SLUB_DEBUG_ON configuration. Since
+# there is no other way to identify defconfig builds, QTI internal
+# representation of perf builds (identified using the string 'perf'),
+# is used to identify if the build is a slub or defconfig one. This
+# way no critical debug feature will be enabled for perf and shipment
+# builds. Other OEMs are also protected using the TARGET_BUILD_VARIANT
+# config.
+
+############ UAPI ############
+UAPI_DIR :=	uapi
+UAPI_INC :=	-I$(AUDIO_ROOT)/include/$(UAPI_DIR)
+
+############ COMMON ############
+COMMON_DIR :=	include
+COMMON_INC :=	-I$(AUDIO_ROOT)/$(COMMON_DIR)
+
+############ MSM Soundwire ############
+
+# for MSM Soundwire Codec
+ifdef CONFIG_SND_SOC_MSM_SDW
+	MSM_SDW_OBJS += msm_sdw_cdc.o
+	MSM_SDW_OBJS += msm_sdw_regmap.o
+	MSM_SDW_OBJS += msm-sdw-tables.o
+	MSM_SDW_OBJS += msm_sdw_cdc_utils.o
+endif
+
+LINUX_INC +=	-Iinclude/linux
+
+INCS +=		$(COMMON_INC) \
+		$(UAPI_INC)
+
+EXTRA_CFLAGS += $(INCS)
+
+
+CDEFINES +=	-DANI_LITTLE_BYTE_ENDIAN \
+		-DANI_LITTLE_BIT_ENDIAN \
+		-DDOT11F_LITTLE_ENDIAN_HOST \
+		-DANI_COMPILER_TYPE_GCC \
+		-DANI_OS_TYPE_ANDROID=6 \
+		-DPTT_SOCK_SVC_ENABLE \
+		-Wall\
+		-Werror\
+		-D__linux__
+
+KBUILD_CPPFLAGS += $(CDEFINES)
+
+# Currently, for versions of gcc which support it, the kernel Makefile
+# is disabling the maybe-uninitialized warning.  Re-enable it for the
+# AUDIO driver.  Note that we must use EXTRA_CFLAGS here so that it
+# will override the kernel settings.
+ifeq ($(call cc-option-yn, -Wmaybe-uninitialized),y)
+EXTRA_CFLAGS += -Wmaybe-uninitialized
+endif
+#EXTRA_CFLAGS += -Wmissing-prototypes
+
+ifeq ($(call cc-option-yn, -Wheader-guard),y)
+EXTRA_CFLAGS += -Wheader-guard
+endif
+
+ifeq ($(KERNEL_BUILD), 0)
+KBUILD_EXTRA_SYMBOLS +=$(OUT)/obj/vendor/qcom/opensource/audio-kernel/ipc/Module.symvers
+KBUILD_EXTRA_SYMBOLS +=$(OUT)/obj/vendor/qcom/opensource/audio-kernel/dsp/Module.symvers
+KBUILD_EXTRA_SYMBOLS +=$(OUT)/obj/vendor/qcom/opensource/audio-kernel/asoc/Module.symvers
+KBUILD_EXTRA_SYMBOLS +=$(OUT)/obj/vendor/qcom/opensource/audio-kernel/asoc/codecs/Module.symvers
+KBUILD_EXTRA_SYMBOLS +=$(OUT)/obj/vendor/qcom/opensource/audio-kernel/soc/Module.symvers
+endif
+
+ifeq ($(CONFIG_SND_SOC_GCOV), y)
+GCOV_PROFILE := y
+endif
+
+# Module information used by KBuild framework
+obj-$(CONFIG_SND_SOC_MSM_SDW) += msm_sdw_dlkm.o
+msm_sdw_dlkm-y := $(MSM_SDW_OBJS)
+
+# inject some build related information
+DEFINES += -DBUILD_TIMESTAMP=\"$(shell date -u +'%Y-%m-%dT%H:%M:%SZ')\"