Merge tag 'tags/mute-led-rework' into for-next

ALSA: control - add generic LED API

This patchset tries to resolve the diversity in the audio LED
control among the ALSA drivers. A new control layer registration
is introduced which allows to run additional operations on
top of the elementary ALSA sound controls.

A new control access group (three bits in the access flags)
was introduced to carry the LED group information for
the sound controls. The low-level sound drivers can just
mark those controls using this access group. This information
is not exported to the user space, but user space can
manage the LED sound control associations through sysfs
(last patch) per Mark's request. It makes things fully
configurable in the kernel and user space (UCM).

The actual state ('route') evaluation is really easy
(the minimal value check for all channels / controls / cards).
If there's more complicated logic for a given hardware,
the card driver may eventually export a new read-only
sound control for the LED group and do the logic itself.

The new LED trigger control code is completely separated
and possibly optional (there's no symbol dependency).
The full code separation allows eventually to move this
LED trigger control to the user space in future.
Actually it replaces the already present functionality
in the kernel space (HDA drivers) and allows a quick adoption
for the recent hardware (ASoC codecs including SoundWire).

snd_ctl_led            24576  0

The sound driver implementation is really easy:

1) call snd_ctl_led_request() when control LED layer should be
   automatically activated
   / it calls module_request("snd-ctl-led") on demand /
2) mark all related kcontrols with
        SNDRV_CTL_ELEM_ACCESS_SPK_LED or
        SNDRV_CTL_ELEM_ACCESS_MIC_LED

Link: https://lore.kernel.org/r/20210317172945.842280-1-perex@perex.cz
Signed-off-by: Takashi Iwai <tiwai@suse.de>

4 files changed, 33 insertions, 12 deletions

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index eee59184de64..8cd67b1b6d15 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -327,7 +327,7 @@ $(obj)/%.dtb.S: $(obj)/%.dtb FORCE
 
 quiet_cmd_dtc = DTC     $@
 cmd_dtc = $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
-	$(DTC) -O $(patsubst .%,%,$(suffix $@)) -o $@ -b 0 \
+	$(DTC) -o $@ -b 0 \
 		$(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(DTC_FLAGS) \
 		-d $(depfile).dtc.tmp $(dtc-tmp) ; \
 	cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
@@ -352,7 +352,7 @@ define rule_dtc
 endef
 
 $(obj)/%.dt.yaml: $(src)/%.dts $(DTC) $(DT_TMP_SCHEMA) FORCE
-	$(call if_changed_rule,dtc,yaml)
+	$(call if_changed_rule,dtc)
 
 dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
 
diff --git a/scripts/dummy-tools/gcc b/scripts/dummy-tools/gcc
index 5c113cad5601..39e65fee59bd 100755
--- a/scripts/dummy-tools/gcc
+++ b/scripts/dummy-tools/gcc
@@ -57,9 +57,9 @@ if arg_contain --version "$@"; then
 fi
 
 if arg_contain -E "$@"; then
-	# For scripts/gcc-version.sh; This emulates GCC 20.0.0
+	# For scripts/cc-version.sh; This emulates GCC 20.0.0
 	if arg_contain - "$@"; then
-		sed 's/^__GNUC__$/20/; s/^__GNUC_MINOR__$/0/; s/^__GNUC_PATCHLEVEL__$/0/'
+		sed -n '/^GCC/{s/__GNUC__/20/; s/__GNUC_MINOR__/0/; s/__GNUC_PATCHLEVEL__/0/; p;}'
 		exit 0
 	else
 		echo "no input files" >&2
@@ -73,6 +73,15 @@ if arg_contain -S "$@"; then
 		echo "%gs"
 		exit 0
 	fi
+
+	# For arch/powerpc/tools/gcc-check-mprofile-kernel.sh
+	if arg_contain -m64 "$@" && arg_contain -mlittle-endian "$@" &&
+		arg_contain -mprofile-kernel "$@"; then
+		if ! test -t 0 && ! grep -q notrace; then
+			echo "_mcount"
+		fi
+		exit 0
+	fi
 fi
 
 # To set GCC_PLUGINS
@@ -85,3 +94,8 @@ if arg_contain -print-file-name=plugin "$@"; then
 	echo $plugin_dir
 	exit 0
 fi
+
+# inverted return value
+if arg_contain -D__SIZEOF_INT128__=0 "$@"; then
+	exit 1
+fi
diff --git a/scripts/gcc-plugins/Makefile b/scripts/gcc-plugins/Makefile
index b5487cce69e8..1952d3bb80c6 100644
--- a/scripts/gcc-plugins/Makefile
+++ b/scripts/gcc-plugins/Makefile
@@ -22,6 +22,7 @@ always-y += $(GCC_PLUGIN)
 GCC_PLUGINS_DIR = $(shell $(CC) -print-file-name=plugin)
 
 plugin_cxxflags	= -Wp,-MMD,$(depfile) $(KBUILD_HOSTCXXFLAGS) -fPIC \
+		  -include $(srctree)/include/linux/compiler-version.h \
 		   -I $(GCC_PLUGINS_DIR)/include -I $(obj) -std=gnu++11 \
 		   -fno-rtti -fno-exceptions -fasynchronous-unwind-tables \
 		   -ggdb -Wno-narrowing -Wno-unused-variable \
diff --git a/scripts/ld-version.sh b/scripts/ld-version.sh
index a463273509b5..1bf3aadde9de 100755
--- a/scripts/ld-version.sh
+++ b/scripts/ld-version.sh
@@ -29,7 +29,7 @@ orig_args="$@"
 # Get the first line of the --version output.
 IFS='
 '
-set -- $("$@" --version)
+set -- $(LC_ALL=C "$@" --version)
 
 # Split the line on spaces.
 IFS=' '
@@ -44,14 +44,20 @@ if [ "$1" = GNU -a "$2" = ld ]; then
 elif [ "$1" = GNU -a "$2" = gold ]; then
 	echo "gold linker is not supported as it is not capable of linking the kernel proper." >&2
 	exit 1
-elif [ "$1" = LLD ]; then
-	version=$2
-	min_version=$lld_min_version
-	name=LLD
-	disp_name=LLD
 else
-	echo "$orig_args: unknown linker" >&2
-	exit 1
+	while [ $# -gt 1 -a "$1" != "LLD" ]; do
+		shift
+	done
+
+	if [ "$1" = LLD ]; then
+		version=$2
+		min_version=$lld_min_version
+		name=LLD
+		disp_name=LLD
+	else
+		echo "$orig_args: unknown linker" >&2
+		exit 1
+	fi
 fi
 
 # Some distributions append a package release number, as in 2.34-4.fc32