ALSA: hda: Move common codec driver into sound/hda/common directory

The snd-hda-codec module contains the most of common code used by both
HD-audio controller and codec drivers, and it's basically independent
from PCI. Let's move the code to sound/hda/common directory as a part
of code reorganization.

The hda_ prefix is dropped from the most of file names as it's rather
superfluous.

Signed-off-by: Takashi Iwai <[e-mail]>
Link: https://patch.msgid.link/[e-mail]

sound/hda/Kconfig

···
 # SPDX-License-Identifier: GPL-2.0-only
+menu "HD-Audio"
+
+source "sound/hda/common/Kconfig"
 source "sound/hda/core/Kconfig"
+
+endmenu

sound/hda/Makefile

···
 # SPDX-License-Identifier: GPL-2.0
 obj-y += core/
+obj-$(CONFIG_SND_HDA) += common/

sound/hda/common/Kconfig

···
+# SPDX-License-Identifier: GPL-2.0-only
+
+config SND_HDA
+	tristate
+	select SND_PCM
+	select SND_VMASTER
+	select SND_JACK
+	select SND_HDA_CORE
+
+if SND_HDA
+
+config SND_HDA_HWDEP
+	bool "Build hwdep interface for HD-audio driver"
+	select SND_HWDEP
+	help
+	  Say Y here to build a hwdep interface for HD-audio driver.
+	  This interface can be used for out-of-band communication
+	  with codecs for debugging purposes.
+
+config SND_HDA_RECONFIG
+	bool "Allow dynamic codec reconfiguration"
+	help
+	  Say Y here to enable the HD-audio codec re-configuration feature.
+	  It allows user to clear the whole codec configuration, change the
+	  codec setup, add extra verbs, and re-configure the codec dynamically.
+
+	  Note that this item alone doesn't provide the sysfs interface, but
+	  enables the feature just for the patch loader below.
+	  If you need the traditional sysfs entries for the manual interaction,
+	  turn on CONFIG_SND_HDA_HWDEP as well.
+
+config SND_HDA_INPUT_BEEP
+	bool "Support digital beep via input layer"
+	depends on INPUT=y || INPUT=SND_HDA
+	help
+	  Say Y here to build a digital beep interface for HD-audio
+	  driver. This interface is used to generate digital beeps.
+
+config SND_HDA_INPUT_BEEP_MODE
+	int "Digital beep registration mode (0=off, 1=on)"
+	depends on SND_HDA_INPUT_BEEP=y
+	default "1"
+	range 0 1
+	help
+	  Set 0 to disable the digital beep interface for HD-audio by default.
+	  Set 1 to always enable the digital beep interface for HD-audio by
+	  default.
+
+config SND_HDA_PATCH_LOADER
+	bool "Support initialization patch loading for HD-audio"
+	select FW_LOADER
+	select SND_HDA_RECONFIG
+	help
+	  Say Y here to allow the HD-audio driver to load a pseudo
+	  firmware file ("patch") for overriding the BIOS setup at
+	  start up.  The "patch" file can be specified via patch module
+	  option, such as patch=hda-init.
+
+config SND_HDA_POWER_SAVE_DEFAULT
+	int "Default time-out for HD-audio power-save mode"
+	depends on PM
+	default 0
+	help
+	  The default time-out value in seconds for HD-audio automatic
+	  power-save mode.  0 means to disable the power-save mode.
+
+config SND_HDA_CTL_DEV_ID
+	bool "Use the device identifier field for controls"
+	depends on SND_HDA_INTEL
+	help
+	  Say Y to use the device identifier field for (mixer)
+	  controls (old behaviour until this option is available).
+
+	  When enabled, the multiple HDA codecs may set the device
+	  field in control (mixer) element identifiers. The use
+	  of this field is not recommended and defined for mixer controls.
+
+	  The old behaviour (Y) is obsolete and will be removed. Consider
+	  to not enable this option.
+endif

sound/hda/common/Makefile

···
+# SPDX-License-Identifier: GPL-2.0
+snd-hda-codec-y := bind.o codec.o jack.o auto_parser.o sysfs.o
+snd-hda-codec-y += controller.o
+snd-hda-codec-$(CONFIG_SND_PROC_FS) += proc.o
+
+snd-hda-codec-$(CONFIG_SND_HDA_HWDEP) += hwdep.o
+snd-hda-codec-$(CONFIG_SND_HDA_INPUT_BEEP) += beep.o
+
+# for trace-points
+CFLAGS_controller.o := -I$(src)
+
+# common driver
+obj-$(CONFIG_SND_HDA) := snd-hda-codec.o

sound/pci/hda/Kconfig

···
 # SPDX-License-Identifier: GPL-2.0-only
 menu "HD-Audio"
 
-config SND_HDA
-	tristate
-	select SND_PCM
-	select SND_VMASTER
-	select SND_JACK
-	select SND_HDA_CORE
-
 config SND_HDA_GENERIC_LEDS
        bool
 
···
 	  will be called snd-hda-acpi.
 
 if SND_HDA
-
-config SND_HDA_HWDEP
-	bool "Build hwdep interface for HD-audio driver"
-	select SND_HWDEP
-	help
-	  Say Y here to build a hwdep interface for HD-audio driver.
-	  This interface can be used for out-of-band communication
-	  with codecs for debugging purposes.
-
-config SND_HDA_RECONFIG
-	bool "Allow dynamic codec reconfiguration"
-	help
-	  Say Y here to enable the HD-audio codec re-configuration feature.
-	  It allows user to clear the whole codec configuration, change the
-	  codec setup, add extra verbs, and re-configure the codec dynamically.
-
-	  Note that this item alone doesn't provide the sysfs interface, but
-	  enables the feature just for the patch loader below.
-	  If you need the traditional sysfs entries for the manual interaction,
-	  turn on CONFIG_SND_HDA_HWDEP as well.
-
-config SND_HDA_INPUT_BEEP
-	bool "Support digital beep via input layer"
-	depends on INPUT=y || INPUT=SND_HDA
-	help
-	  Say Y here to build a digital beep interface for HD-audio
-	  driver. This interface is used to generate digital beeps.
-
-config SND_HDA_INPUT_BEEP_MODE
-	int "Digital beep registration mode (0=off, 1=on)"
-	depends on SND_HDA_INPUT_BEEP=y
-	default "1"
-	range 0 1
-	help
-	  Set 0 to disable the digital beep interface for HD-audio by default.
-	  Set 1 to always enable the digital beep interface for HD-audio by
-	  default.
-
-config SND_HDA_PATCH_LOADER
-	bool "Support initialization patch loading for HD-audio"
-	select FW_LOADER
-	select SND_HDA_RECONFIG
-	help
-	  Say Y here to allow the HD-audio driver to load a pseudo
-	  firmware file ("patch") for overriding the BIOS setup at
-	  start up.  The "patch" file can be specified via patch module
-	  option, such as patch=hda-init.
 
 config SND_HDA_CIRRUS_SCODEC
 	tristate
···
 comment "Set to Y if you want auto-loading the codec driver"
 	depends on SND_HDA=y && SND_HDA_GENERIC=m
 
-config SND_HDA_POWER_SAVE_DEFAULT
-	int "Default time-out for HD-audio power-save mode"
-	depends on PM
-	default 0
-	help
-	  The default time-out value in seconds for HD-audio automatic
-	  power-save mode.  0 means to disable the power-save mode.
-
 config SND_HDA_INTEL_HDMI_SILENT_STREAM
 	bool "Enable Silent Stream always for HDMI"
 	depends on SND_HDA_INTEL
···
 	  to start playing audio after the clock has been stopped.
 	  This feature can impact power consumption as resources
 	  are kept reserved both at transmitter and receiver.
-
-config SND_HDA_CTL_DEV_ID
-	bool "Use the device identifier field for controls"
-	depends on SND_HDA_INTEL
-	help
-	  Say Y to use the device identifier field for (mixer)
-	  controls (old behaviour until this option is available).
-
-	  When enabled, the multiple HDA codecs may set the device
-	  field in control (mixer) element identifiers. The use
-	  of this field is not recommended and defined for mixer controls.
-
-	  The old behaviour (Y) is obsolete and will be removed. Consider
-	  to not enable this option.
 
 endif
 

sound/pci/hda/Makefile

···
 snd-hda-tegra-y := hda_tegra.o
 snd-hda-acpi-y := hda_acpi.o
 
-snd-hda-codec-y := hda_bind.o hda_codec.o hda_jack.o hda_auto_parser.o hda_sysfs.o
-snd-hda-codec-y += hda_controller.o
-snd-hda-codec-$(CONFIG_SND_PROC_FS) += hda_proc.o
-
-snd-hda-codec-$(CONFIG_SND_HDA_HWDEP) += hda_hwdep.o
-snd-hda-codec-$(CONFIG_SND_HDA_INPUT_BEEP) += hda_beep.o
-
 # for trace-points
-CFLAGS_hda_controller.o := -I$(src)
 CFLAGS_hda_intel.o := -I$(src)
+
+subdir-ccflags-y += -I$(src)/../../hda/common
 
 snd-hda-codec-generic-y :=	hda_generic.o
 snd-hda-codec-realtek-y :=	patch_realtek.o
···
 snd-hda-scodec-tas2781-y :=	tas2781_hda.o
 snd-hda-scodec-tas2781-i2c-y :=	tas2781_hda_i2c.o
 snd-hda-scodec-tas2781-spi-y :=	tas2781_hda_spi.o
-
-# common driver
-obj-$(CONFIG_SND_HDA) := snd-hda-codec.o
 
 # codec drivers
 obj-$(CONFIG_SND_HDA_GENERIC) += snd-hda-codec-generic.o

sound/pci/hda/hda_controller.c sound/hda/common/controller.c

···
 #include "hda_local.h"
 
 #define CREATE_TRACE_POINTS
-#include "hda_controller_trace.h"
+#include "controller_trace.h"
 
 /* DSP lock helpers */
 #define dsp_lock(dev)		snd_hdac_dsp_lock(azx_stream(dev))

sound/pci/hda/hda_controller_trace.h sound/hda/common/controller_trace.h

···
 /* SPDX-License-Identifier: GPL-2.0 */
 #undef TRACE_SYSTEM
 #define TRACE_SYSTEM hda_controller
-#define TRACE_INCLUDE_FILE hda_controller_trace
+#define TRACE_INCLUDE_FILE controller_trace
 
 #if !defined(_TRACE_HDA_CONTROLLER_H) || defined(TRACE_HEADER_MULTI_READ)
 #define _TRACE_HDA_CONTROLLER_H