Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

9 files changed, 2746 insertions, 0 deletions

diff --git a/tools/testing/selftests/alsa/.gitignore b/tools/testing/selftests/alsa/.gitignore
new file mode 100644
index 0000000000..12dc3fcd34
--- /dev/null
+++ b/tools/testing/selftests/alsa/.gitignore
@@ -0,0 +1,3 @@
+mixer-test
+pcm-test
+test-pcmtest-driver
diff --git a/tools/testing/selftests/alsa/Makefile b/tools/testing/selftests/alsa/Makefile
new file mode 100644
index 0000000000..5af9ba8a46
--- /dev/null
+++ b/tools/testing/selftests/alsa/Makefile
@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+
+CFLAGS += $(shell pkg-config --cflags alsa)
+LDLIBS += $(shell pkg-config --libs alsa)
+ifeq ($(LDLIBS),)
+LDLIBS += -lasound
+endif
+CFLAGS += -L$(OUTPUT) -Wl,-rpath=./
+
+LDLIBS+=-lpthread
+
+OVERRIDE_TARGETS = 1
+
+TEST_GEN_PROGS := mixer-test pcm-test test-pcmtest-driver
+
+TEST_GEN_PROGS_EXTENDED := libatest.so
+
+TEST_FILES := conf.d pcm-test.conf
+
+include ../lib.mk
+
+$(OUTPUT)/libatest.so: conf.c alsa-local.h
+	$(CC) $(CFLAGS) -shared -fPIC $< $(LDLIBS) -o $@
+
+$(OUTPUT)/%: %.c $(TEST_GEN_PROGS_EXTENDED) alsa-local.h
+	$(CC) $(CFLAGS) $< $(LDLIBS) -latest -o $@
diff --git a/tools/testing/selftests/alsa/alsa-local.h b/tools/testing/selftests/alsa/alsa-local.h
new file mode 100644
index 0000000000..de030dc23b
--- /dev/null
+++ b/tools/testing/selftests/alsa/alsa-local.h
@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// kselftest configuration helpers for the hw specific configuration
+//
+// Original author: Jaroslav Kysela <perex@perex.cz>
+// Copyright (c) 2022 Red Hat Inc.
+
+#ifndef __ALSA_LOCAL_H
+#define __ALSA_LOCAL_H
+
+#include <alsa/asoundlib.h>
+
+snd_config_t *get_alsalib_config(void);
+
+snd_config_t *conf_load_from_file(const char *filename);
+void conf_load(void);
+void conf_free(void);
+snd_config_t *conf_by_card(int card);
+snd_config_t *conf_get_subtree(snd_config_t *root, const char *key1, const char *key2);
+int conf_get_count(snd_config_t *root, const char *key1, const char *key2);
+const char *conf_get_string(snd_config_t *root, const char *key1, const char *key2, const char *def);
+long conf_get_long(snd_config_t *root, const char *key1, const char *key2, long def);
+int conf_get_bool(snd_config_t *root, const char *key1, const char *key2, int def);
+void conf_get_string_array(snd_config_t *root, const char *key1, const char *key2,
+			   const char **array, int array_size, const char *def);
+
+#endif /* __ALSA_LOCAL_H */
diff --git a/tools/testing/selftests/alsa/conf.c b/tools/testing/selftests/alsa/conf.c
new file mode 100644
index 0000000000..ff09038fdc
--- /dev/null
+++ b/tools/testing/selftests/alsa/conf.c
@@ -0,0 +1,469 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// kselftest configuration helpers for the hw specific configuration
+//
+// Original author: Jaroslav Kysela <perex@perex.cz>
+// Copyright (c) 2022 Red Hat Inc.
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <errno.h>
+#include <assert.h>
+#include <dirent.h>
+#include <regex.h>
+#include <sys/stat.h>
+
+#include "../kselftest.h"
+#include "alsa-local.h"
+
+#define SYSFS_ROOT "/sys"
+
+struct card_data {
+	int card;
+	snd_config_t *config;
+	const char *filename;
+	struct card_data *next;
+};
+
+static struct card_data *conf_cards;
+
+static const char *alsa_config =
+"ctl.hw {\n"
+"	@args [ CARD ]\n"
+"	@args.CARD.type string\n"
+"	type hw\n"
+"	card $CARD\n"
+"}\n"
+"pcm.hw {\n"
+"	@args [ CARD DEV SUBDEV ]\n"
+"	@args.CARD.type string\n"
+"	@args.DEV.type integer\n"
+"	@args.SUBDEV.type integer\n"
+"	type hw\n"
+"	card $CARD\n"
+"	device $DEV\n"
+"	subdevice $SUBDEV\n"
+"}\n"
+;
+
+#ifdef SND_LIB_VER
+#if SND_LIB_VERSION >= SND_LIB_VER(1, 2, 6)
+#define LIB_HAS_LOAD_STRING
+#endif
+#endif
+
+#ifndef LIB_HAS_LOAD_STRING
+static int snd_config_load_string(snd_config_t **config, const char *s,
+				  size_t size)
+{
+	snd_input_t *input;
+	snd_config_t *dst;
+	int err;
+
+	assert(config && s);
+	if (size == 0)
+		size = strlen(s);
+	err = snd_input_buffer_open(&input, s, size);
+	if (err < 0)
+		return err;
+	err = snd_config_top(&dst);
+	if (err < 0) {
+		snd_input_close(input);
+		return err;
+	}
+	err = snd_config_load(dst, input);
+	snd_input_close(input);
+	if (err < 0) {
+		snd_config_delete(dst);
+		return err;
+	}
+	*config = dst;
+	return 0;
+}
+#endif
+
+snd_config_t *get_alsalib_config(void)
+{
+	snd_config_t *config;
+	int err;
+
+	err = snd_config_load_string(&config, alsa_config, strlen(alsa_config));
+	if (err < 0) {
+		ksft_print_msg("Unable to parse custom alsa-lib configuration: %s\n",
+			       snd_strerror(err));
+		ksft_exit_fail();
+	}
+	return config;
+}
+
+static struct card_data *conf_data_by_card(int card, bool msg)
+{
+	struct card_data *conf;
+
+	for (conf = conf_cards; conf; conf = conf->next) {
+		if (conf->card == card) {
+			if (msg)
+				ksft_print_msg("using hw card config %s for card %d\n",
+					       conf->filename, card);
+			return conf;
+		}
+	}
+	return NULL;
+}
+
+static int dump_config_tree(snd_config_t *top)
+{
+	snd_output_t *out;
+	int err;
+
+	err = snd_output_stdio_attach(&out, stdout, 0);
+	if (err < 0)
+		ksft_exit_fail_msg("stdout attach\n");
+	if (snd_config_save(top, out))
+		ksft_exit_fail_msg("config save\n");
+	snd_output_close(out);
+}
+
+snd_config_t *conf_load_from_file(const char *filename)
+{
+	snd_config_t *dst;
+	snd_input_t *input;
+	int err;
+
+	err = snd_input_stdio_open(&input, filename, "r");
+	if (err < 0)
+		ksft_exit_fail_msg("Unable to parse filename %s\n", filename);
+	err = snd_config_top(&dst);
+	if (err < 0)
+		ksft_exit_fail_msg("Out of memory\n");
+	err = snd_config_load(dst, input);
+	snd_input_close(input);
+	if (err < 0)
+		ksft_exit_fail_msg("Unable to parse filename %s\n", filename);
+	return dst;
+}
+
+static char *sysfs_get(const char *sysfs_root, const char *id)
+{
+	char path[PATH_MAX], link[PATH_MAX + 1];
+	struct stat sb;
+	ssize_t len;
+	char *e;
+	int fd;
+
+	if (id[0] == '/')
+		id++;
+	snprintf(path, sizeof(path), "%s/%s", sysfs_root, id);
+	if (lstat(path, &sb) != 0)
+		return NULL;
+	if (S_ISLNK(sb.st_mode)) {
+		len = readlink(path, link, sizeof(link) - 1);
+		if (len <= 0) {
+			ksft_exit_fail_msg("sysfs: cannot read link '%s': %s\n",
+					   path, strerror(errno));
+			return NULL;
+		}
+		link[len] = '\0';
+		e = strrchr(link, '/');
+		if (e)
+			return strdup(e + 1);
+		return NULL;
+	}
+	if (S_ISDIR(sb.st_mode))
+		return NULL;
+	if ((sb.st_mode & S_IRUSR) == 0)
+		return NULL;
+
+	fd = open(path, O_RDONLY);
+	if (fd < 0) {
+		if (errno == ENOENT)
+			return NULL;
+		ksft_exit_fail_msg("sysfs: open failed for '%s': %s\n",
+				   path, strerror(errno));
+	}
+	len = read(fd, path, sizeof(path)-1);
+	close(fd);
+	if (len < 0)
+		ksft_exit_fail_msg("sysfs: unable to read value '%s': %s\n",
+				   path, strerror(errno));
+	while (len > 0 && path[len-1] == '\n')
+		len--;
+	path[len] = '\0';
+	e = strdup(path);
+	if (e == NULL)
+		ksft_exit_fail_msg("Out of memory\n");
+	return e;
+}
+
+static bool sysfs_match(const char *sysfs_root, snd_config_t *config)
+{
+	snd_config_t *node, *path_config, *regex_config;
+	snd_config_iterator_t i, next;
+	const char *path_string, *regex_string, *v;
+	regex_t re;
+	regmatch_t match[1];
+	int iter = 0, ret;
+
+	snd_config_for_each(i, next, config) {
+		node = snd_config_iterator_entry(i);
+		if (snd_config_search(node, "path", &path_config))
+			ksft_exit_fail_msg("Missing path field in the sysfs block\n");
+		if (snd_config_search(node, "regex", &regex_config))
+			ksft_exit_fail_msg("Missing regex field in the sysfs block\n");
+		if (snd_config_get_string(path_config, &path_string))
+			ksft_exit_fail_msg("Path field in the sysfs block is not a string\n");
+		if (snd_config_get_string(regex_config, &regex_string))
+			ksft_exit_fail_msg("Regex field in the sysfs block is not a string\n");
+		iter++;
+		v = sysfs_get(sysfs_root, path_string);
+		if (!v)
+			return false;
+		if (regcomp(&re, regex_string, REG_EXTENDED))
+			ksft_exit_fail_msg("Wrong regex '%s'\n", regex_string);
+		ret = regexec(&re, v, 1, match, 0);
+		regfree(&re);
+		if (ret)
+			return false;
+	}
+	return iter > 0;
+}
+
+static bool test_filename1(int card, const char *filename, const char *sysfs_card_root)
+{
+	struct card_data *data, *data2;
+	snd_config_t *config, *sysfs_config, *card_config, *sysfs_card_config, *node;
+	snd_config_iterator_t i, next;
+
+	config = conf_load_from_file(filename);
+	if (snd_config_search(config, "sysfs", &sysfs_config) ||
+	    snd_config_get_type(sysfs_config) != SND_CONFIG_TYPE_COMPOUND)
+		ksft_exit_fail_msg("Missing global sysfs block in filename %s\n", filename);
+	if (snd_config_search(config, "card", &card_config) ||
+	    snd_config_get_type(card_config) != SND_CONFIG_TYPE_COMPOUND)
+		ksft_exit_fail_msg("Missing global card block in filename %s\n", filename);
+	if (!sysfs_match(SYSFS_ROOT, sysfs_config))
+		return false;
+	snd_config_for_each(i, next, card_config) {
+		node = snd_config_iterator_entry(i);
+		if (snd_config_search(node, "sysfs", &sysfs_card_config) ||
+		    snd_config_get_type(sysfs_card_config) != SND_CONFIG_TYPE_COMPOUND)
+			ksft_exit_fail_msg("Missing card sysfs block in filename %s\n", filename);
+		if (!sysfs_match(sysfs_card_root, sysfs_card_config))
+			continue;
+		data = malloc(sizeof(*data));
+		if (!data)
+			ksft_exit_fail_msg("Out of memory\n");
+		data2 = conf_data_by_card(card, false);
+		if (data2)
+			ksft_exit_fail_msg("Duplicate card '%s' <-> '%s'\n", filename, data2->filename);
+		data->card = card;
+		data->filename = filename;
+		data->config = node;
+		data->next = conf_cards;
+		conf_cards = data;
+		return true;
+	}
+	return false;
+}
+
+static bool test_filename(const char *filename)
+{
+	char fn[128];
+	int card;
+
+	for (card = 0; card < 32; card++) {
+		snprintf(fn, sizeof(fn), "%s/class/sound/card%d", SYSFS_ROOT, card);
+		if (access(fn, R_OK) == 0 && test_filename1(card, filename, fn))
+			return true;
+	}
+	return false;
+}
+
+static int filename_filter(const struct dirent *dirent)
+{
+	size_t flen;
+
+	if (dirent == NULL)
+		return 0;
+	if (dirent->d_type == DT_DIR)
+		return 0;
+	flen = strlen(dirent->d_name);
+	if (flen <= 5)
+		return 0;
+	if (strncmp(&dirent->d_name[flen-5], ".conf", 5) == 0)
+		return 1;
+	return 0;
+}
+
+void conf_load(void)
+{
+	const char *fn = "conf.d";
+	struct dirent **namelist;
+	int n, j;
+
+	n = scandir(fn, &namelist, filename_filter, alphasort);
+	if (n < 0)
+		ksft_exit_fail_msg("scandir: %s\n", strerror(errno));
+	for (j = 0; j < n; j++) {
+		size_t sl = strlen(fn) + strlen(namelist[j]->d_name) + 2;
+		char *filename = malloc(sl);
+		if (filename == NULL)
+			ksft_exit_fail_msg("Out of memory\n");
+		sprintf(filename, "%s/%s", fn, namelist[j]->d_name);
+		if (test_filename(filename))
+			filename = NULL;
+		free(filename);
+		free(namelist[j]);
+	}
+	free(namelist);
+}
+
+void conf_free(void)
+{
+	struct card_data *conf;
+
+	while (conf_cards) {
+		conf = conf_cards;
+		conf_cards = conf->next;
+		snd_config_delete(conf->config);
+	}
+}
+
+snd_config_t *conf_by_card(int card)
+{
+	struct card_data *conf;
+
+	conf = conf_data_by_card(card, true);
+	if (conf)
+		return conf->config;
+	return NULL;
+}
+
+static int conf_get_by_keys(snd_config_t *root, const char *key1,
+			    const char *key2, snd_config_t **result)
+{
+	int ret;
+
+	if (key1) {
+		ret = snd_config_search(root, key1, &root);
+		if (ret != -ENOENT && ret < 0)
+			return ret;
+	}
+	if (key2)
+		ret = snd_config_search(root, key2, &root);
+	if (ret >= 0)
+		*result = root;
+	return ret;
+}
+
+snd_config_t *conf_get_subtree(snd_config_t *root, const char *key1, const char *key2)
+{
+	int ret;
+
+	if (!root)
+		return NULL;
+	ret = conf_get_by_keys(root, key1, key2, &root);
+	if (ret == -ENOENT)
+		return NULL;
+	if (ret < 0)
+		ksft_exit_fail_msg("key '%s'.'%s' search error: %s\n", key1, key2, snd_strerror(ret));
+	return root;
+}
+
+int conf_get_count(snd_config_t *root, const char *key1, const char *key2)
+{
+	snd_config_t *cfg;
+	snd_config_iterator_t i, next;
+	int count, ret;
+
+	if (!root)
+		return -1;
+	ret = conf_get_by_keys(root, key1, key2, &cfg);
+	if (ret == -ENOENT)
+		return -1;
+	if (ret < 0)
+		ksft_exit_fail_msg("key '%s'.'%s' search error: %s\n", key1, key2, snd_strerror(ret));
+	if (snd_config_get_type(cfg) != SND_CONFIG_TYPE_COMPOUND)
+		ksft_exit_fail_msg("key '%s'.'%s' is not a compound\n", key1, key2);
+	count = 0;
+	snd_config_for_each(i, next, cfg)
+		count++;
+	return count;
+}
+
+const char *conf_get_string(snd_config_t *root, const char *key1, const char *key2, const char *def)
+{
+	snd_config_t *cfg;
+	const char *s;
+	int ret;
+
+	if (!root)
+		return def;
+	ret = conf_get_by_keys(root, key1, key2, &cfg);
+	if (ret == -ENOENT)
+		return def;
+	if (ret < 0)
+		ksft_exit_fail_msg("key '%s'.'%s' search error: %s\n", key1, key2, snd_strerror(ret));
+	if (snd_config_get_string(cfg, &s))
+		ksft_exit_fail_msg("key '%s'.'%s' is not a string\n", key1, key2);
+	return s;
+}
+
+long conf_get_long(snd_config_t *root, const char *key1, const char *key2, long def)
+{
+	snd_config_t *cfg;
+	long l;
+	int ret;
+
+	if (!root)
+		return def;
+	ret = conf_get_by_keys(root, key1, key2, &cfg);
+	if (ret == -ENOENT)
+		return def;
+	if (ret < 0)
+		ksft_exit_fail_msg("key '%s'.'%s' search error: %s\n", key1, key2, snd_strerror(ret));
+	if (snd_config_get_integer(cfg, &l))
+		ksft_exit_fail_msg("key '%s'.'%s' is not an integer\n", key1, key2);
+	return l;
+}
+
+int conf_get_bool(snd_config_t *root, const char *key1, const char *key2, int def)
+{
+	snd_config_t *cfg;
+	int ret;
+
+	if (!root)
+		return def;
+	ret = conf_get_by_keys(root, key1, key2, &cfg);
+	if (ret == -ENOENT)
+		return def;
+	if (ret < 0)
+		ksft_exit_fail_msg("key '%s'.'%s' search error: %s\n", key1, key2, snd_strerror(ret));
+	ret = snd_config_get_bool(cfg);
+	if (ret < 0)
+		ksft_exit_fail_msg("key '%s'.'%s' is not an bool\n", key1, key2);
+	return !!ret;
+}
+
+void conf_get_string_array(snd_config_t *root, const char *key1, const char *key2,
+			   const char **array, int array_size, const char *def)
+{
+	snd_config_t *cfg;
+	char buf[16];
+	int ret, index;
+
+	ret = conf_get_by_keys(root, key1, key2, &cfg);
+	if (ret == -ENOENT)
+		cfg = NULL;
+	else if (ret < 0)
+		ksft_exit_fail_msg("key '%s'.'%s' search error: %s\n", key1, key2, snd_strerror(ret));
+	for (index = 0; index < array_size; index++) {
+		if (cfg == NULL) {
+			array[index] = def;
+		} else {
+			sprintf(buf, "%i", index);
+			array[index] = conf_get_string(cfg, buf, NULL, def);
+		}
+	}
+}
diff --git a/tools/testing/selftests/alsa/conf.d/Lenovo_ThinkPad_P1_Gen2.conf b/tools/testing/selftests/alsa/conf.d/Lenovo_ThinkPad_P1_Gen2.conf
new file mode 100644
index 0000000000..5b40a91629
--- /dev/null
+++ b/tools/testing/selftests/alsa/conf.d/Lenovo_ThinkPad_P1_Gen2.conf
@@ -0,0 +1,84 @@
+#
+# Example configuration for Lenovo ThinkPad P1 Gen2
+#
+
+#
+# Use regex match for the string read from the given sysfs path
+#
+# The sysfs root directory (/sys) is hardwired in the test code
+# (may be changed on demand).
+#
+# All strings must match.
+#
+sysfs [
+	{
+		path "class/dmi/id/product_sku"
+		regex "LENOVO_MT_20QU_BU_Think_FM_ThinkPad P1 Gen 2"
+	}
+]
+
+card.hda {
+	#
+	# Use regex match for the /sys/class/sound/card*/ tree (relative)
+	#
+	sysfs [
+		{
+			path "device/subsystem_device"
+			regex "0x229e"
+		}
+		{
+			path "device/subsystem_vendor"
+			regex "0x17aa"
+		}
+	]
+
+	#
+	# PCM configuration
+	#
+	# pcm.0.0 - device 0 subdevice 0
+	#
+	pcm.0.0 {
+		PLAYBACK {
+			test.time1 {
+				access RW_INTERLEAVED	# can be omitted - default
+				format S16_LE		# can be omitted - default
+				rate 48000		# can be omitted - default
+				channels 2		# can be omitted - default
+				period_size 512
+				buffer_size 4096
+			}
+			test.time2 {
+				access RW_INTERLEAVED
+				format S16_LE
+				rate 48000
+				channels 2
+				period_size 24000
+				buffer_size 192000
+			}
+			test.time3 {
+				access RW_INTERLEAVED
+				format S16_LE
+				rate 44100
+				channels 2
+				period_size 24000
+				buffer_size 192000
+			}
+		}
+		CAPTURE {
+			# use default tests, check for the presence
+		}
+	}
+	#
+	# uncomment to force the missing device checks
+	#
+	#pcm.0.2 {
+	#	PLAYBACK {
+	#		# check for the presence
+	#	}
+	#}
+	#pcm.0.3 {
+	#	CAPTURE {
+	#		# check for the presence
+	#	}
+	#}
+}
diff --git a/tools/testing/selftests/alsa/mixer-test.c b/tools/testing/selftests/alsa/mixer-test.c
new file mode 100644
index 0000000000..df942149c6
--- /dev/null
+++ b/tools/testing/selftests/alsa/mixer-test.c
@@ -0,0 +1,1112 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// kselftest for the ALSA mixer API
+//
+// Original author: Mark Brown <broonie@kernel.org>
+// Copyright (c) 2021-2 Arm Limited
+
+// This test will iterate over all cards detected in the system, exercising
+// every mixer control it can find.  This may conflict with other system
+// software if there is audio activity so is best run on a system with a
+// minimal active userspace.
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <limits.h>
+#include <string.h>
+#include <getopt.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include <math.h>
+#include <errno.h>
+#include <assert.h>
+#include <alsa/asoundlib.h>
+#include <poll.h>
+#include <stdint.h>
+
+#include "../kselftest.h"
+#include "alsa-local.h"
+
+#define TESTS_PER_CONTROL 7
+
+struct card_data {
+	snd_ctl_t *handle;
+	int card;
+	struct pollfd pollfd;
+	int num_ctls;
+	snd_ctl_elem_list_t *ctls;
+	struct card_data *next;
+};
+
+struct ctl_data {
+	const char *name;
+	snd_ctl_elem_id_t *id;
+	snd_ctl_elem_info_t *info;
+	snd_ctl_elem_value_t *def_val;
+	int elem;
+	int event_missing;
+	int event_spurious;
+	struct card_data *card;
+	struct ctl_data *next;
+};
+
+int num_cards = 0;
+int num_controls = 0;
+struct card_data *card_list = NULL;
+struct ctl_data *ctl_list = NULL;
+
+static void find_controls(void)
+{
+	char name[32];
+	int card, ctl, err;
+	struct card_data *card_data;
+	struct ctl_data *ctl_data;
+	snd_config_t *config;
+	char *card_name, *card_longname;
+
+	card = -1;
+	if (snd_card_next(&card) < 0 || card < 0)
+		return;
+
+	config = get_alsalib_config();
+
+	while (card >= 0) {
+		sprintf(name, "hw:%d", card);
+
+		card_data = malloc(sizeof(*card_data));
+		if (!card_data)
+			ksft_exit_fail_msg("Out of memory\n");
+
+		err = snd_ctl_open_lconf(&card_data->handle, name, 0, config);
+		if (err < 0) {
+			ksft_print_msg("Failed to get hctl for card %d: %s\n",
+				       card, snd_strerror(err));
+			goto next_card;
+		}
+
+		err = snd_card_get_name(card, &card_name);
+		if (err != 0)
+			card_name = "Unknown";
+		err = snd_card_get_longname(card, &card_longname);
+		if (err != 0)
+			card_longname = "Unknown";
+		ksft_print_msg("Card %d - %s (%s)\n", card,
+			       card_name, card_longname);
+
+		/* Count controls */
+		snd_ctl_elem_list_malloc(&card_data->ctls);
+		snd_ctl_elem_list(card_data->handle, card_data->ctls);
+		card_data->num_ctls = snd_ctl_elem_list_get_count(card_data->ctls);
+
+		/* Enumerate control information */
+		snd_ctl_elem_list_alloc_space(card_data->ctls, card_data->num_ctls);
+		snd_ctl_elem_list(card_data->handle, card_data->ctls);
+
+		card_data->card = num_cards++;
+		card_data->next = card_list;
+		card_list = card_data;
+
+		num_controls += card_data->num_ctls;
+
+		for (ctl = 0; ctl < card_data->num_ctls; ctl++) {
+			ctl_data = malloc(sizeof(*ctl_data));
+			if (!ctl_data)
+				ksft_exit_fail_msg("Out of memory\n");
+
+			memset(ctl_data, 0, sizeof(*ctl_data));
+			ctl_data->card = card_data;
+			ctl_data->elem = ctl;
+			ctl_data->name = snd_ctl_elem_list_get_name(card_data->ctls,
+								    ctl);
+
+			err = snd_ctl_elem_id_malloc(&ctl_data->id);
+			if (err < 0)
+				ksft_exit_fail_msg("Out of memory\n");
+
+			err = snd_ctl_elem_info_malloc(&ctl_data->info);
+			if (err < 0)
+				ksft_exit_fail_msg("Out of memory\n");
+
+			err = snd_ctl_elem_value_malloc(&ctl_data->def_val);
+			if (err < 0)
+				ksft_exit_fail_msg("Out of memory\n");
+
+			snd_ctl_elem_list_get_id(card_data->ctls, ctl,
+						 ctl_data->id);
+			snd_ctl_elem_info_set_id(ctl_data->info, ctl_data->id);
+			err = snd_ctl_elem_info(card_data->handle,
+						ctl_data->info);
+			if (err < 0) {
+				ksft_print_msg("%s getting info for %s\n",
+					       snd_strerror(err),
+					       ctl_data->name);
+			}
+
+			snd_ctl_elem_value_set_id(ctl_data->def_val,
+						  ctl_data->id);
+
+			ctl_data->next = ctl_list;
+			ctl_list = ctl_data;
+		}
+
+		/* Set up for events */
+		err = snd_ctl_subscribe_events(card_data->handle, true);
+		if (err < 0) {
+			ksft_exit_fail_msg("snd_ctl_subscribe_events() failed for card %d: %d\n",
+					   card, err);
+		}
+
+		err = snd_ctl_poll_descriptors_count(card_data->handle);
+		if (err != 1) {
+			ksft_exit_fail_msg("Unexpected descriptor count %d for card %d\n",
+					   err, card);
+		}
+
+		err = snd_ctl_poll_descriptors(card_data->handle,
+					       &card_data->pollfd, 1);
+		if (err != 1) {
+			ksft_exit_fail_msg("snd_ctl_poll_descriptors() failed for card %d: %d\n",
+				       card, err);
+		}
+
+	next_card:
+		if (snd_card_next(&card) < 0) {
+			ksft_print_msg("snd_card_next");
+			break;
+		}
+	}
+
+	snd_config_delete(config);
+}
+
+/*
+ * Block for up to timeout ms for an event, returns a negative value
+ * on error, 0 for no event and 1 for an event.
+ */
+static int wait_for_event(struct ctl_data *ctl, int timeout)
+{
+	unsigned short revents;
+	snd_ctl_event_t *event;
+	int err;
+	unsigned int mask = 0;
+	unsigned int ev_id;
+
+	snd_ctl_event_alloca(&event);
+
+	do {
+		err = poll(&(ctl->card->pollfd), 1, timeout);
+		if (err < 0) {
+			ksft_print_msg("poll() failed for %s: %s (%d)\n",
+				       ctl->name, strerror(errno), errno);
+			return -1;
+		}
+		/* Timeout */
+		if (err == 0)
+			return 0;
+
+		err = snd_ctl_poll_descriptors_revents(ctl->card->handle,
+						       &(ctl->card->pollfd),
+						       1, &revents);
+		if (err < 0) {
+			ksft_print_msg("snd_ctl_poll_descriptors_revents() failed for %s: %d\n",
+				       ctl->name, err);
+			return err;
+		}
+		if (revents & POLLERR) {
+			ksft_print_msg("snd_ctl_poll_descriptors_revents() reported POLLERR for %s\n",
+				       ctl->name);
+			return -1;
+		}
+		/* No read events */
+		if (!(revents & POLLIN)) {
+			ksft_print_msg("No POLLIN\n");
+			continue;
+		}
+
+		err = snd_ctl_read(ctl->card->handle, event);
+		if (err < 0) {
+			ksft_print_msg("snd_ctl_read() failed for %s: %d\n",
+			       ctl->name, err);
+			return err;
+		}
+
+		if (snd_ctl_event_get_type(event) != SND_CTL_EVENT_ELEM)
+			continue;
+
+		/* The ID returned from the event is 1 less than numid */
+		mask = snd_ctl_event_elem_get_mask(event);
+		ev_id = snd_ctl_event_elem_get_numid(event);
+		if (ev_id != snd_ctl_elem_info_get_numid(ctl->info)) {
+			ksft_print_msg("Event for unexpected ctl %s\n",
+				       snd_ctl_event_elem_get_name(event));
+			continue;
+		}
+
+		if ((mask & SND_CTL_EVENT_MASK_REMOVE) == SND_CTL_EVENT_MASK_REMOVE) {
+			ksft_print_msg("Removal event for %s\n",
+				       ctl->name);
+			return -1;
+		}
+	} while ((mask & SND_CTL_EVENT_MASK_VALUE) != SND_CTL_EVENT_MASK_VALUE);
+
+	return 1;
+}
+
+static bool ctl_value_index_valid(struct ctl_data *ctl,
+				  snd_ctl_elem_value_t *val,
+				  int index)
+{
+	long int_val;
+	long long int64_val;
+
+	switch (snd_ctl_elem_info_get_type(ctl->info)) {
+	case SND_CTL_ELEM_TYPE_NONE:
+		ksft_print_msg("%s.%d Invalid control type NONE\n",
+			       ctl->name, index);
+		return false;
+
+	case SND_CTL_ELEM_TYPE_BOOLEAN:
+		int_val = snd_ctl_elem_value_get_boolean(val, index);
+		switch (int_val) {
+		case 0:
+		case 1:
+			break;
+		default:
+			ksft_print_msg("%s.%d Invalid boolean value %ld\n",
+				       ctl->name, index, int_val);
+			return false;
+		}
+		break;
+
+	case SND_CTL_ELEM_TYPE_INTEGER:
+		int_val = snd_ctl_elem_value_get_integer(val, index);
+
+		if (int_val < snd_ctl_elem_info_get_min(ctl->info)) {
+			ksft_print_msg("%s.%d value %ld less than minimum %ld\n",
+				       ctl->name, index, int_val,
+				       snd_ctl_elem_info_get_min(ctl->info));
+			return false;
+		}
+
+		if (int_val > snd_ctl_elem_info_get_max(ctl->info)) {
+			ksft_print_msg("%s.%d value %ld more than maximum %ld\n",
+				       ctl->name, index, int_val,
+				       snd_ctl_elem_info_get_max(ctl->info));
+			return false;
+		}
+
+		/* Only check step size if there is one and we're in bounds */
+		if (snd_ctl_elem_info_get_step(ctl->info) &&
+		    (int_val - snd_ctl_elem_info_get_min(ctl->info) %
+		     snd_ctl_elem_info_get_step(ctl->info))) {
+			ksft_print_msg("%s.%d value %ld invalid for step %ld minimum %ld\n",
+				       ctl->name, index, int_val,
+				       snd_ctl_elem_info_get_step(ctl->info),
+				       snd_ctl_elem_info_get_min(ctl->info));
+			return false;
+		}
+		break;
+
+	case SND_CTL_ELEM_TYPE_INTEGER64:
+		int64_val = snd_ctl_elem_value_get_integer64(val, index);
+
+		if (int64_val < snd_ctl_elem_info_get_min64(ctl->info)) {
+			ksft_print_msg("%s.%d value %lld less than minimum %lld\n",
+				       ctl->name, index, int64_val,
+				       snd_ctl_elem_info_get_min64(ctl->info));
+			return false;
+		}
+
+		if (int64_val > snd_ctl_elem_info_get_max64(ctl->info)) {
+			ksft_print_msg("%s.%d value %lld more than maximum %ld\n",
+				       ctl->name, index, int64_val,
+				       snd_ctl_elem_info_get_max(ctl->info));
+			return false;
+		}
+
+		/* Only check step size if there is one and we're in bounds */
+		if (snd_ctl_elem_info_get_step64(ctl->info) &&
+		    (int64_val - snd_ctl_elem_info_get_min64(ctl->info)) %
+		    snd_ctl_elem_info_get_step64(ctl->info)) {
+			ksft_print_msg("%s.%d value %lld invalid for step %lld minimum %lld\n",
+				       ctl->name, index, int64_val,
+				       snd_ctl_elem_info_get_step64(ctl->info),
+				       snd_ctl_elem_info_get_min64(ctl->info));
+			return false;
+		}
+		break;
+
+	case SND_CTL_ELEM_TYPE_ENUMERATED:
+		int_val = snd_ctl_elem_value_get_enumerated(val, index);
+
+		if (int_val < 0) {
+			ksft_print_msg("%s.%d negative value %ld for enumeration\n",
+				       ctl->name, index, int_val);
+			return false;
+		}
+
+		if (int_val >= snd_ctl_elem_info_get_items(ctl->info)) {
+			ksft_print_msg("%s.%d value %ld more than item count %ld\n",
+				       ctl->name, index, int_val,
+				       snd_ctl_elem_info_get_items(ctl->info));
+			return false;
+		}
+		break;
+
+	default:
+		/* No tests for other types */
+		break;
+	}
+
+	return true;
+}
+
+/*
+ * Check that the provided value meets the constraints for the
+ * provided control.
+ */
+static bool ctl_value_valid(struct ctl_data *ctl, snd_ctl_elem_value_t *val)
+{
+	int i;
+	bool valid = true;
+
+	for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++)
+		if (!ctl_value_index_valid(ctl, val, i))
+			valid = false;
+
+	return valid;
+}
+
+/*
+ * Check that we can read the default value and it is valid. Write
+ * tests use the read value to restore the default.
+ */
+static void test_ctl_get_value(struct ctl_data *ctl)
+{
+	int err;
+
+	/* If the control is turned off let's be polite */
+	if (snd_ctl_elem_info_is_inactive(ctl->info)) {
+		ksft_print_msg("%s is inactive\n", ctl->name);
+		ksft_test_result_skip("get_value.%d.%d\n",
+				      ctl->card->card, ctl->elem);
+		return;
+	}
+
+	/* Can't test reading on an unreadable control */
+	if (!snd_ctl_elem_info_is_readable(ctl->info)) {
+		ksft_print_msg("%s is not readable\n", ctl->name);
+		ksft_test_result_skip("get_value.%d.%d\n",
+				      ctl->card->card, ctl->elem);
+		return;
+	}
+
+	err = snd_ctl_elem_read(ctl->card->handle, ctl->def_val);
+	if (err < 0) {
+		ksft_print_msg("snd_ctl_elem_read() failed: %s\n",
+			       snd_strerror(err));
+		goto out;
+	}
+
+	if (!ctl_value_valid(ctl, ctl->def_val))
+		err = -EINVAL;
+
+out:
+	ksft_test_result(err >= 0, "get_value.%d.%d\n",
+			 ctl->card->card, ctl->elem);
+}
+
+static bool strend(const char *haystack, const char *needle)
+{
+	size_t haystack_len = strlen(haystack);
+	size_t needle_len = strlen(needle);
+
+	if (needle_len > haystack_len)
+		return false;
+	return strcmp(haystack + haystack_len - needle_len, needle) == 0;
+}
+
+static void test_ctl_name(struct ctl_data *ctl)
+{
+	bool name_ok = true;
+
+	ksft_print_msg("%d.%d %s\n", ctl->card->card, ctl->elem,
+		       ctl->name);
+
+	/* Only boolean controls should end in Switch */
+	if (strend(ctl->name, " Switch")) {
+		if (snd_ctl_elem_info_get_type(ctl->info) != SND_CTL_ELEM_TYPE_BOOLEAN) {
+			ksft_print_msg("%d.%d %s ends in Switch but is not boolean\n",
+				       ctl->card->card, ctl->elem, ctl->name);
+			name_ok = false;
+		}
+	}
+
+	/* Writeable boolean controls should end in Switch */
+	if (snd_ctl_elem_info_get_type(ctl->info) == SND_CTL_ELEM_TYPE_BOOLEAN &&
+	    snd_ctl_elem_info_is_writable(ctl->info)) {
+		if (!strend(ctl->name, " Switch")) {
+			ksft_print_msg("%d.%d %s is a writeable boolean but not a Switch\n",
+				       ctl->card->card, ctl->elem, ctl->name);
+			name_ok = false;
+		}
+	}
+
+	ksft_test_result(name_ok, "name.%d.%d\n",
+			 ctl->card->card, ctl->elem);
+}
+
+static void show_values(struct ctl_data *ctl, snd_ctl_elem_value_t *orig_val,
+			snd_ctl_elem_value_t *read_val)
+{
+	long long orig_int, read_int;
+	int i;
+
+	for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
+		switch (snd_ctl_elem_info_get_type(ctl->info)) {
+		case SND_CTL_ELEM_TYPE_BOOLEAN:
+			orig_int = snd_ctl_elem_value_get_boolean(orig_val, i);
+			read_int = snd_ctl_elem_value_get_boolean(read_val, i);
+			break;
+
+		case SND_CTL_ELEM_TYPE_INTEGER:
+			orig_int = snd_ctl_elem_value_get_integer(orig_val, i);
+			read_int = snd_ctl_elem_value_get_integer(read_val, i);
+			break;
+
+		case SND_CTL_ELEM_TYPE_INTEGER64:
+			orig_int = snd_ctl_elem_value_get_integer64(orig_val,
+								    i);
+			read_int = snd_ctl_elem_value_get_integer64(read_val,
+								    i);
+			break;
+
+		case SND_CTL_ELEM_TYPE_ENUMERATED:
+			orig_int = snd_ctl_elem_value_get_enumerated(orig_val,
+								     i);
+			read_int = snd_ctl_elem_value_get_enumerated(read_val,
+								     i);
+			break;
+
+		default:
+			return;
+		}
+
+		ksft_print_msg("%s.%d orig %lld read %lld, is_volatile %d\n",
+			       ctl->name, i, orig_int, read_int,
+			       snd_ctl_elem_info_is_volatile(ctl->info));
+	}
+}
+
+static bool show_mismatch(struct ctl_data *ctl, int index,
+			  snd_ctl_elem_value_t *read_val,
+			  snd_ctl_elem_value_t *expected_val)
+{
+	long long expected_int, read_int;
+
+	/*
+	 * We factor out the code to compare values representable as
+	 * integers, ensure that check doesn't log otherwise.
+	 */
+	expected_int = 0;
+	read_int = 0;
+
+	switch (snd_ctl_elem_info_get_type(ctl->info)) {
+	case SND_CTL_ELEM_TYPE_BOOLEAN:
+		expected_int = snd_ctl_elem_value_get_boolean(expected_val,
+							      index);
+		read_int = snd_ctl_elem_value_get_boolean(read_val, index);
+		break;
+
+	case SND_CTL_ELEM_TYPE_INTEGER:
+		expected_int = snd_ctl_elem_value_get_integer(expected_val,
+							      index);
+		read_int = snd_ctl_elem_value_get_integer(read_val, index);
+		break;
+
+	case SND_CTL_ELEM_TYPE_INTEGER64:
+		expected_int = snd_ctl_elem_value_get_integer64(expected_val,
+								index);
+		read_int = snd_ctl_elem_value_get_integer64(read_val,
+							    index);
+		break;
+
+	case SND_CTL_ELEM_TYPE_ENUMERATED:
+		expected_int = snd_ctl_elem_value_get_enumerated(expected_val,
+								 index);
+		read_int = snd_ctl_elem_value_get_enumerated(read_val,
+							     index);
+		break;
+
+	default:
+		break;
+	}
+
+	if (expected_int != read_int) {
+		/*
+		 * NOTE: The volatile attribute means that the hardware
+		 * can voluntarily change the state of control element
+		 * independent of any operation by software.  
+		 */
+		bool is_volatile = snd_ctl_elem_info_is_volatile(ctl->info);
+		ksft_print_msg("%s.%d expected %lld but read %lld, is_volatile %d\n",
+			       ctl->name, index, expected_int, read_int, is_volatile);
+		return !is_volatile;
+	} else {
+		return false;
+	}
+}
+
+/*
+ * Write a value then if possible verify that we get the expected
+ * result.  An optional expected value can be provided if we expect
+ * the write to fail, for verifying that invalid writes don't corrupt
+ * anything.
+ */
+static int write_and_verify(struct ctl_data *ctl,
+			    snd_ctl_elem_value_t *write_val,
+			    snd_ctl_elem_value_t *expected_val)
+{
+	int err, i;
+	bool error_expected, mismatch_shown;
+	snd_ctl_elem_value_t *initial_val, *read_val, *w_val;
+	snd_ctl_elem_value_alloca(&initial_val);
+	snd_ctl_elem_value_alloca(&read_val);
+	snd_ctl_elem_value_alloca(&w_val);
+
+	/*
+	 * We need to copy the write value since writing can modify
+	 * the value which causes surprises, and allocate an expected
+	 * value if we expect to read back what we wrote.
+	 */
+	snd_ctl_elem_value_copy(w_val, write_val);
+	if (expected_val) {
+		error_expected = true;
+	} else {
+		error_expected = false;
+		snd_ctl_elem_value_alloca(&expected_val);
+		snd_ctl_elem_value_copy(expected_val, write_val);
+	}
+
+	/* Store the value before we write */
+	if (snd_ctl_elem_info_is_readable(ctl->info)) {
+		snd_ctl_elem_value_set_id(initial_val, ctl->id);
+
+		err = snd_ctl_elem_read(ctl->card->handle, initial_val);
+		if (err < 0) {
+			ksft_print_msg("snd_ctl_elem_read() failed: %s\n",
+				       snd_strerror(err));
+			return err;
+		}
+	}
+
+	/*
+	 * Do the write, if we have an expected value ignore the error
+	 * and carry on to validate the expected value.
+	 */
+	err = snd_ctl_elem_write(ctl->card->handle, w_val);
+	if (err < 0 && !error_expected) {
+		ksft_print_msg("snd_ctl_elem_write() failed: %s\n",
+			       snd_strerror(err));
+		return err;
+	}
+
+	/* Can we do the verification part? */
+	if (!snd_ctl_elem_info_is_readable(ctl->info))
+		return err;
+
+	snd_ctl_elem_value_set_id(read_val, ctl->id);
+
+	err = snd_ctl_elem_read(ctl->card->handle, read_val);
+	if (err < 0) {
+		ksft_print_msg("snd_ctl_elem_read() failed: %s\n",
+			       snd_strerror(err));
+		return err;
+	}
+
+	/*
+	 * Check for an event if the value changed, or confirm that
+	 * there was none if it didn't.  We rely on the kernel
+	 * generating the notification before it returns from the
+	 * write, this is currently true, should that ever change this
+	 * will most likely break and need updating.
+	 */
+	if (!snd_ctl_elem_info_is_volatile(ctl->info)) {
+		err = wait_for_event(ctl, 0);
+		if (snd_ctl_elem_value_compare(initial_val, read_val)) {
+			if (err < 1) {
+				ksft_print_msg("No event generated for %s\n",
+					       ctl->name);
+				show_values(ctl, initial_val, read_val);
+				ctl->event_missing++;
+			}
+		} else {
+			if (err != 0) {
+				ksft_print_msg("Spurious event generated for %s\n",
+					       ctl->name);
+				show_values(ctl, initial_val, read_val);
+				ctl->event_spurious++;
+			}
+		}
+	}
+
+	/*
+	 * Use the libray to compare values, if there's a mismatch
+	 * carry on and try to provide a more useful diagnostic than
+	 * just "mismatch".
+	 */
+	if (!snd_ctl_elem_value_compare(expected_val, read_val))
+		return 0;
+
+	mismatch_shown = false;
+	for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++)
+		if (show_mismatch(ctl, i, read_val, expected_val))
+			mismatch_shown = true;
+
+	if (!mismatch_shown)
+		ksft_print_msg("%s read and written values differ\n",
+			       ctl->name);
+
+	return -1;
+}
+
+/*
+ * Make sure we can write the default value back to the control, this
+ * should validate that at least some write works.
+ */
+static void test_ctl_write_default(struct ctl_data *ctl)
+{
+	int err;
+
+	/* If the control is turned off let's be polite */
+	if (snd_ctl_elem_info_is_inactive(ctl->info)) {
+		ksft_print_msg("%s is inactive\n", ctl->name);
+		ksft_test_result_skip("write_default.%d.%d\n",
+				      ctl->card->card, ctl->elem);
+		return;
+	}
+
+	if (!snd_ctl_elem_info_is_writable(ctl->info)) {
+		ksft_print_msg("%s is not writeable\n", ctl->name);
+		ksft_test_result_skip("write_default.%d.%d\n",
+				      ctl->card->card, ctl->elem);
+		return;
+	}
+
+	/* No idea what the default was for unreadable controls */
+	if (!snd_ctl_elem_info_is_readable(ctl->info)) {
+		ksft_print_msg("%s couldn't read default\n", ctl->name);
+		ksft_test_result_skip("write_default.%d.%d\n",
+				      ctl->card->card, ctl->elem);
+		return;
+	}
+
+	err = write_and_verify(ctl, ctl->def_val, NULL);
+
+	ksft_test_result(err >= 0, "write_default.%d.%d\n",
+			 ctl->card->card, ctl->elem);
+}
+
+static bool test_ctl_write_valid_boolean(struct ctl_data *ctl)
+{
+	int err, i, j;
+	bool fail = false;
+	snd_ctl_elem_value_t *val;
+	snd_ctl_elem_value_alloca(&val);
+
+	snd_ctl_elem_value_set_id(val, ctl->id);
+
+	for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
+		for (j = 0; j < 2; j++) {
+			snd_ctl_elem_value_set_boolean(val, i, j);
+			err = write_and_verify(ctl, val, NULL);
+			if (err != 0)
+				fail = true;
+		}
+	}
+
+	return !fail;
+}
+
+static bool test_ctl_write_valid_integer(struct ctl_data *ctl)
+{
+	int err;
+	int i;
+	long j, step;
+	bool fail = false;
+	snd_ctl_elem_value_t *val;
+	snd_ctl_elem_value_alloca(&val);
+
+	snd_ctl_elem_value_set_id(val, ctl->id);
+
+	step = snd_ctl_elem_info_get_step(ctl->info);
+	if (!step)
+		step = 1;
+
+	for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
+		for (j = snd_ctl_elem_info_get_min(ctl->info);
+		     j <= snd_ctl_elem_info_get_max(ctl->info); j += step) {
+
+			snd_ctl_elem_value_set_integer(val, i, j);
+			err = write_and_verify(ctl, val, NULL);
+			if (err != 0)
+				fail = true;
+		}
+	}
+
+
+	return !fail;
+}
+
+static bool test_ctl_write_valid_integer64(struct ctl_data *ctl)
+{
+	int err, i;
+	long long j, step;
+	bool fail = false;
+	snd_ctl_elem_value_t *val;
+	snd_ctl_elem_value_alloca(&val);
+
+	snd_ctl_elem_value_set_id(val, ctl->id);
+
+	step = snd_ctl_elem_info_get_step64(ctl->info);
+	if (!step)
+		step = 1;
+
+	for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
+		for (j = snd_ctl_elem_info_get_min64(ctl->info);
+		     j <= snd_ctl_elem_info_get_max64(ctl->info); j += step) {
+
+			snd_ctl_elem_value_set_integer64(val, i, j);
+			err = write_and_verify(ctl, val, NULL);
+			if (err != 0)
+				fail = true;
+		}
+	}
+
+	return !fail;
+}
+
+static bool test_ctl_write_valid_enumerated(struct ctl_data *ctl)
+{
+	int err, i, j;
+	bool fail = false;
+	snd_ctl_elem_value_t *val;
+	snd_ctl_elem_value_alloca(&val);
+
+	snd_ctl_elem_value_set_id(val, ctl->id);
+
+	for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
+		for (j = 0; j < snd_ctl_elem_info_get_items(ctl->info); j++) {
+			snd_ctl_elem_value_set_enumerated(val, i, j);
+			err = write_and_verify(ctl, val, NULL);
+			if (err != 0)
+				fail = true;
+		}
+	}
+
+	return !fail;
+}
+
+static void test_ctl_write_valid(struct ctl_data *ctl)
+{
+	bool pass;
+
+	/* If the control is turned off let's be polite */
+	if (snd_ctl_elem_info_is_inactive(ctl->info)) {
+		ksft_print_msg("%s is inactive\n", ctl->name);
+		ksft_test_result_skip("write_valid.%d.%d\n",
+				      ctl->card->card, ctl->elem);
+		return;
+	}
+
+	if (!snd_ctl_elem_info_is_writable(ctl->info)) {
+		ksft_print_msg("%s is not writeable\n", ctl->name);
+		ksft_test_result_skip("write_valid.%d.%d\n",
+				      ctl->card->card, ctl->elem);
+		return;
+	}
+
+	switch (snd_ctl_elem_info_get_type(ctl->info)) {
+	case SND_CTL_ELEM_TYPE_BOOLEAN:
+		pass = test_ctl_write_valid_boolean(ctl);
+		break;
+
+	case SND_CTL_ELEM_TYPE_INTEGER:
+		pass = test_ctl_write_valid_integer(ctl);
+		break;
+
+	case SND_CTL_ELEM_TYPE_INTEGER64:
+		pass = test_ctl_write_valid_integer64(ctl);
+		break;
+
+	case SND_CTL_ELEM_TYPE_ENUMERATED:
+		pass = test_ctl_write_valid_enumerated(ctl);
+		break;
+
+	default:
+		/* No tests for this yet */
+		ksft_test_result_skip("write_valid.%d.%d\n",
+				      ctl->card->card, ctl->elem);
+		return;
+	}
+
+	/* Restore the default value to minimise disruption */
+	write_and_verify(ctl, ctl->def_val, NULL);
+
+	ksft_test_result(pass, "write_valid.%d.%d\n",
+			 ctl->card->card, ctl->elem);
+}
+
+static bool test_ctl_write_invalid_value(struct ctl_data *ctl,
+					 snd_ctl_elem_value_t *val)
+{
+	int err;
+
+	/* Ideally this will fail... */
+	err = snd_ctl_elem_write(ctl->card->handle, val);
+	if (err < 0)
+		return false;
+
+	/* ...but some devices will clamp to an in range value */
+	err = snd_ctl_elem_read(ctl->card->handle, val);
+	if (err < 0) {
+		ksft_print_msg("%s failed to read: %s\n",
+			       ctl->name, snd_strerror(err));
+		return true;
+	}
+
+	return !ctl_value_valid(ctl, val);
+}
+
+static bool test_ctl_write_invalid_boolean(struct ctl_data *ctl)
+{
+	int i;
+	bool fail = false;
+	snd_ctl_elem_value_t *val;
+	snd_ctl_elem_value_alloca(&val);
+
+	for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
+		snd_ctl_elem_value_copy(val, ctl->def_val);
+		snd_ctl_elem_value_set_boolean(val, i, 2);
+
+		if (test_ctl_write_invalid_value(ctl, val))
+			fail = true;
+	}
+
+	return !fail;
+}
+
+static bool test_ctl_write_invalid_integer(struct ctl_data *ctl)
+{
+	int i;
+	bool fail = false;
+	snd_ctl_elem_value_t *val;
+	snd_ctl_elem_value_alloca(&val);
+
+	for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
+		if (snd_ctl_elem_info_get_min(ctl->info) != LONG_MIN) {
+			/* Just under range */
+			snd_ctl_elem_value_copy(val, ctl->def_val);
+			snd_ctl_elem_value_set_integer(val, i,
+			       snd_ctl_elem_info_get_min(ctl->info) - 1);
+
+			if (test_ctl_write_invalid_value(ctl, val))
+				fail = true;
+
+			/* Minimum representable value */
+			snd_ctl_elem_value_copy(val, ctl->def_val);
+			snd_ctl_elem_value_set_integer(val, i, LONG_MIN);
+
+			if (test_ctl_write_invalid_value(ctl, val))
+				fail = true;
+		}
+
+		if (snd_ctl_elem_info_get_max(ctl->info) != LONG_MAX) {
+			/* Just over range */
+			snd_ctl_elem_value_copy(val, ctl->def_val);
+			snd_ctl_elem_value_set_integer(val, i,
+			       snd_ctl_elem_info_get_max(ctl->info) + 1);
+
+			if (test_ctl_write_invalid_value(ctl, val))
+				fail = true;
+
+			/* Maximum representable value */
+			snd_ctl_elem_value_copy(val, ctl->def_val);
+			snd_ctl_elem_value_set_integer(val, i, LONG_MAX);
+
+			if (test_ctl_write_invalid_value(ctl, val))
+				fail = true;
+		}
+	}
+
+	return !fail;
+}
+
+static bool test_ctl_write_invalid_integer64(struct ctl_data *ctl)
+{
+	int i;
+	bool fail = false;
+	snd_ctl_elem_value_t *val;
+	snd_ctl_elem_value_alloca(&val);
+
+	for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
+		if (snd_ctl_elem_info_get_min64(ctl->info) != LLONG_MIN) {
+			/* Just under range */
+			snd_ctl_elem_value_copy(val, ctl->def_val);
+			snd_ctl_elem_value_set_integer64(val, i,
+				snd_ctl_elem_info_get_min64(ctl->info) - 1);
+
+			if (test_ctl_write_invalid_value(ctl, val))
+				fail = true;
+
+			/* Minimum representable value */
+			snd_ctl_elem_value_copy(val, ctl->def_val);
+			snd_ctl_elem_value_set_integer64(val, i, LLONG_MIN);
+
+			if (test_ctl_write_invalid_value(ctl, val))
+				fail = true;
+		}
+
+		if (snd_ctl_elem_info_get_max64(ctl->info) != LLONG_MAX) {
+			/* Just over range */
+			snd_ctl_elem_value_copy(val, ctl->def_val);
+			snd_ctl_elem_value_set_integer64(val, i,
+				snd_ctl_elem_info_get_max64(ctl->info) + 1);
+
+			if (test_ctl_write_invalid_value(ctl, val))
+				fail = true;
+
+			/* Maximum representable value */
+			snd_ctl_elem_value_copy(val, ctl->def_val);
+			snd_ctl_elem_value_set_integer64(val, i, LLONG_MAX);
+
+			if (test_ctl_write_invalid_value(ctl, val))
+				fail = true;
+		}
+	}
+
+	return !fail;
+}
+
+static bool test_ctl_write_invalid_enumerated(struct ctl_data *ctl)
+{
+	int i;
+	bool fail = false;
+	snd_ctl_elem_value_t *val;
+	snd_ctl_elem_value_alloca(&val);
+
+	snd_ctl_elem_value_set_id(val, ctl->id);
+
+	for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
+		/* One beyond maximum */
+		snd_ctl_elem_value_copy(val, ctl->def_val);
+		snd_ctl_elem_value_set_enumerated(val, i,
+				  snd_ctl_elem_info_get_items(ctl->info));
+
+		if (test_ctl_write_invalid_value(ctl, val))
+			fail = true;
+
+		/* Maximum representable value */
+		snd_ctl_elem_value_copy(val, ctl->def_val);
+		snd_ctl_elem_value_set_enumerated(val, i, UINT_MAX);
+
+		if (test_ctl_write_invalid_value(ctl, val))
+			fail = true;
+
+	}
+
+	return !fail;
+}
+
+
+static void test_ctl_write_invalid(struct ctl_data *ctl)
+{
+	bool pass;
+
+	/* If the control is turned off let's be polite */
+	if (snd_ctl_elem_info_is_inactive(ctl->info)) {
+		ksft_print_msg("%s is inactive\n", ctl->name);
+		ksft_test_result_skip("write_invalid.%d.%d\n",
+				      ctl->card->card, ctl->elem);
+		return;
+	}
+
+	if (!snd_ctl_elem_info_is_writable(ctl->info)) {
+		ksft_print_msg("%s is not writeable\n", ctl->name);
+		ksft_test_result_skip("write_invalid.%d.%d\n",
+				      ctl->card->card, ctl->elem);
+		return;
+	}
+
+	switch (snd_ctl_elem_info_get_type(ctl->info)) {
+	case SND_CTL_ELEM_TYPE_BOOLEAN:
+		pass = test_ctl_write_invalid_boolean(ctl);
+		break;
+
+	case SND_CTL_ELEM_TYPE_INTEGER:
+		pass = test_ctl_write_invalid_integer(ctl);
+		break;
+
+	case SND_CTL_ELEM_TYPE_INTEGER64:
+		pass = test_ctl_write_invalid_integer64(ctl);
+		break;
+
+	case SND_CTL_ELEM_TYPE_ENUMERATED:
+		pass = test_ctl_write_invalid_enumerated(ctl);
+		break;
+
+	default:
+		/* No tests for this yet */
+		ksft_test_result_skip("write_invalid.%d.%d\n",
+				      ctl->card->card, ctl->elem);
+		return;
+	}
+
+	/* Restore the default value to minimise disruption */
+	write_and_verify(ctl, ctl->def_val, NULL);
+
+	ksft_test_result(pass, "write_invalid.%d.%d\n",
+			 ctl->card->card, ctl->elem);
+}
+
+static void test_ctl_event_missing(struct ctl_data *ctl)
+{
+	ksft_test_result(!ctl->event_missing, "event_missing.%d.%d\n",
+			 ctl->card->card, ctl->elem);
+}
+
+static void test_ctl_event_spurious(struct ctl_data *ctl)
+{
+	ksft_test_result(!ctl->event_spurious, "event_spurious.%d.%d\n",
+			 ctl->card->card, ctl->elem);
+}
+
+int main(void)
+{
+	struct ctl_data *ctl;
+
+	ksft_print_header();
+
+	find_controls();
+
+	ksft_set_plan(num_controls * TESTS_PER_CONTROL);
+
+	for (ctl = ctl_list; ctl != NULL; ctl = ctl->next) {
+		/*
+		 * Must test get_value() before we write anything, the
+		 * test stores the default value for later cleanup.
+		 */
+		test_ctl_get_value(ctl);
+		test_ctl_name(ctl);
+		test_ctl_write_default(ctl);
+		test_ctl_write_valid(ctl);
+		test_ctl_write_invalid(ctl);
+		test_ctl_event_missing(ctl);
+		test_ctl_event_spurious(ctl);
+	}
+
+	ksft_exit_pass();
+
+	return 0;
+}
diff --git a/tools/testing/selftests/alsa/pcm-test.c b/tools/testing/selftests/alsa/pcm-test.c
new file mode 100644
index 0000000000..c0a39818c5
--- /dev/null
+++ b/tools/testing/selftests/alsa/pcm-test.c
@@ -0,0 +1,631 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// kselftest for the ALSA PCM API
+//
+// Original author: Jaroslav Kysela <perex@perex.cz>
+// Copyright (c) 2022 Red Hat Inc.
+
+// This test will iterate over all cards detected in the system, exercising
+// every PCM device it can find.  This may conflict with other system
+// software if there is audio activity so is best run on a system with a
+// minimal active userspace.
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <errno.h>
+#include <assert.h>
+#include <pthread.h>
+
+#include "../kselftest.h"
+#include "alsa-local.h"
+
+typedef struct timespec timestamp_t;
+
+struct card_data {
+	int card;
+	pthread_t thread;
+	struct card_data *next;
+};
+
+struct card_data *card_list = NULL;
+
+struct pcm_data {
+	snd_pcm_t *handle;
+	int card;
+	int device;
+	int subdevice;
+	snd_pcm_stream_t stream;
+	snd_config_t *pcm_config;
+	struct pcm_data *next;
+};
+
+struct pcm_data *pcm_list = NULL;
+
+int num_missing = 0;
+struct pcm_data *pcm_missing = NULL;
+
+snd_config_t *default_pcm_config;
+
+/* Lock while reporting results since kselftest doesn't */
+pthread_mutex_t results_lock = PTHREAD_MUTEX_INITIALIZER;
+
+enum test_class {
+	TEST_CLASS_DEFAULT,
+	TEST_CLASS_SYSTEM,
+};
+
+void timestamp_now(timestamp_t *tstamp)
+{
+	if (clock_gettime(CLOCK_MONOTONIC_RAW, tstamp))
+		ksft_exit_fail_msg("clock_get_time\n");
+}
+
+long long timestamp_diff_ms(timestamp_t *tstamp)
+{
+	timestamp_t now, diff;
+	timestamp_now(&now);
+	if (tstamp->tv_nsec > now.tv_nsec) {
+		diff.tv_sec = now.tv_sec - tstamp->tv_sec - 1;
+		diff.tv_nsec = (now.tv_nsec + 1000000000L) - tstamp->tv_nsec;
+	} else {
+		diff.tv_sec = now.tv_sec - tstamp->tv_sec;
+		diff.tv_nsec = now.tv_nsec - tstamp->tv_nsec;
+	}
+	return (diff.tv_sec * 1000) + ((diff.tv_nsec + 500000L) / 1000000L);
+}
+
+static long device_from_id(snd_config_t *node)
+{
+	const char *id;
+	char *end;
+	long v;
+
+	if (snd_config_get_id(node, &id))
+		ksft_exit_fail_msg("snd_config_get_id\n");
+	errno = 0;
+	v = strtol(id, &end, 10);
+	if (errno || *end)
+		return -1;
+	return v;
+}
+
+static void missing_device(int card, int device, int subdevice, snd_pcm_stream_t stream)
+{
+	struct pcm_data *pcm_data;
+
+	for (pcm_data = pcm_list; pcm_data != NULL; pcm_data = pcm_data->next) {
+		if (pcm_data->card != card)
+			continue;
+		if (pcm_data->device != device)
+			continue;
+		if (pcm_data->subdevice != subdevice)
+			continue;
+		if (pcm_data->stream != stream)
+			continue;
+		return;
+	}
+	pcm_data = calloc(1, sizeof(*pcm_data));
+	if (!pcm_data)
+		ksft_exit_fail_msg("Out of memory\n");
+	pcm_data->card = card;
+	pcm_data->device = device;
+	pcm_data->subdevice = subdevice;
+	pcm_data->stream = stream;
+	pcm_data->next = pcm_missing;
+	pcm_missing = pcm_data;
+	num_missing++;
+}
+
+static void missing_devices(int card, snd_config_t *card_config)
+{
+	snd_config_t *pcm_config, *node1, *node2;
+	snd_config_iterator_t i1, i2, next1, next2;
+	int device, subdevice;
+
+	pcm_config = conf_get_subtree(card_config, "pcm", NULL);
+	if (!pcm_config)
+		return;
+	snd_config_for_each(i1, next1, pcm_config) {
+		node1 = snd_config_iterator_entry(i1);
+		device = device_from_id(node1);
+		if (device < 0)
+			continue;
+		if (snd_config_get_type(node1) != SND_CONFIG_TYPE_COMPOUND)
+			continue;
+		snd_config_for_each(i2, next2, node1) {
+			node2 = snd_config_iterator_entry(i2);
+			subdevice = device_from_id(node2);
+			if (subdevice < 0)
+				continue;
+			if (conf_get_subtree(node2, "PLAYBACK", NULL))
+				missing_device(card, device, subdevice, SND_PCM_STREAM_PLAYBACK);
+			if (conf_get_subtree(node2, "CAPTURE", NULL))
+				missing_device(card, device, subdevice, SND_PCM_STREAM_CAPTURE);
+		}
+	}
+}
+
+static void find_pcms(void)
+{
+	char name[32], key[64];
+	char *card_name, *card_longname;
+	int card, dev, subdev, count, direction, err;
+	snd_pcm_stream_t stream;
+	struct pcm_data *pcm_data;
+	snd_ctl_t *handle;
+	snd_pcm_info_t *pcm_info;
+	snd_config_t *config, *card_config, *pcm_config;
+	struct card_data *card_data;
+
+	snd_pcm_info_alloca(&pcm_info);
+
+	card = -1;
+	if (snd_card_next(&card) < 0 || card < 0)
+		return;
+
+	config = get_alsalib_config();
+
+	while (card >= 0) {
+		sprintf(name, "hw:%d", card);
+
+		err = snd_ctl_open_lconf(&handle, name, 0, config);
+		if (err < 0) {
+			ksft_print_msg("Failed to get hctl for card %d: %s\n",
+				       card, snd_strerror(err));
+			goto next_card;
+		}
+
+		err = snd_card_get_name(card, &card_name);
+		if (err != 0)
+			card_name = "Unknown";
+		err = snd_card_get_longname(card, &card_longname);
+		if (err != 0)
+			card_longname = "Unknown";
+		ksft_print_msg("Card %d - %s (%s)\n", card,
+			       card_name, card_longname);
+
+		card_config = conf_by_card(card);
+
+		card_data = calloc(1, sizeof(*card_data));
+		if (!card_data)
+			ksft_exit_fail_msg("Out of memory\n");
+		card_data->card = card;
+		card_data->next = card_list;
+		card_list = card_data;
+
+		dev = -1;
+		while (1) {
+			if (snd_ctl_pcm_next_device(handle, &dev) < 0)
+				ksft_exit_fail_msg("snd_ctl_pcm_next_device\n");
+			if (dev < 0)
+				break;
+
+			for (direction = 0; direction < 2; direction++) {
+				stream = direction ? SND_PCM_STREAM_CAPTURE : SND_PCM_STREAM_PLAYBACK;
+				sprintf(key, "pcm.%d.%s", dev, snd_pcm_stream_name(stream));
+				pcm_config = conf_get_subtree(card_config, key, NULL);
+				if (conf_get_bool(card_config, key, "skip", false)) {
+					ksft_print_msg("skipping pcm %d.%d.%s\n", card, dev, snd_pcm_stream_name(stream));
+					continue;
+				}
+				snd_pcm_info_set_device(pcm_info, dev);
+				snd_pcm_info_set_subdevice(pcm_info, 0);
+				snd_pcm_info_set_stream(pcm_info, stream);
+				err = snd_ctl_pcm_info(handle, pcm_info);
+				if (err == -ENOENT)
+					continue;
+				if (err < 0)
+					ksft_exit_fail_msg("snd_ctl_pcm_info: %d:%d:%d\n",
+							   dev, 0, stream);
+				count = snd_pcm_info_get_subdevices_count(pcm_info);
+				for (subdev = 0; subdev < count; subdev++) {
+					sprintf(key, "pcm.%d.%d.%s", dev, subdev, snd_pcm_stream_name(stream));
+					if (conf_get_bool(card_config, key, "skip", false)) {
+						ksft_print_msg("skipping pcm %d.%d.%d.%s\n", card, dev,
+							       subdev, snd_pcm_stream_name(stream));
+						continue;
+					}
+					pcm_data = calloc(1, sizeof(*pcm_data));
+					if (!pcm_data)
+						ksft_exit_fail_msg("Out of memory\n");
+					pcm_data->card = card;
+					pcm_data->device = dev;
+					pcm_data->subdevice = subdev;
+					pcm_data->stream = stream;
+					pcm_data->pcm_config = conf_get_subtree(card_config, key, NULL);
+					pcm_data->next = pcm_list;
+					pcm_list = pcm_data;
+				}
+			}
+		}
+
+		/* check for missing devices */
+		missing_devices(card, card_config);
+
+	next_card:
+		snd_ctl_close(handle);
+		if (snd_card_next(&card) < 0) {
+			ksft_print_msg("snd_card_next");
+			break;
+		}
+	}
+
+	snd_config_delete(config);
+}
+
+static void test_pcm_time(struct pcm_data *data, enum test_class class,
+			  const char *test_name, snd_config_t *pcm_cfg)
+{
+	char name[64], msg[256];
+	const int duration_s = 2, margin_ms = 100;
+	const int duration_ms = duration_s * 1000;
+	const char *cs;
+	int i, err;
+	snd_pcm_t *handle = NULL;
+	snd_pcm_access_t access = SND_PCM_ACCESS_RW_INTERLEAVED;
+	snd_pcm_format_t format, old_format;
+	const char *alt_formats[8];
+	unsigned char *samples = NULL;
+	snd_pcm_sframes_t frames;
+	long long ms;
+	long rate, channels, period_size, buffer_size;
+	unsigned int rrate;
+	snd_pcm_uframes_t rperiod_size, rbuffer_size, start_threshold;
+	timestamp_t tstamp;
+	bool pass = false;
+	snd_pcm_hw_params_t *hw_params;
+	snd_pcm_sw_params_t *sw_params;
+	const char *test_class_name;
+	bool skip = true;
+	const char *desc;
+
+	switch (class) {
+	case TEST_CLASS_DEFAULT:
+		test_class_name = "default";
+		break;
+	case TEST_CLASS_SYSTEM:
+		test_class_name = "system";
+		break;
+	default:
+		ksft_exit_fail_msg("Unknown test class %d\n", class);
+		break;
+	}
+
+	desc = conf_get_string(pcm_cfg, "description", NULL, NULL);
+	if (desc)
+		ksft_print_msg("%s.%s.%d.%d.%d.%s - %s\n",
+			       test_class_name, test_name,
+			       data->card, data->device, data->subdevice,
+			       snd_pcm_stream_name(data->stream),
+			       desc);
+
+
+	snd_pcm_hw_params_alloca(&hw_params);
+	snd_pcm_sw_params_alloca(&sw_params);
+
+	cs = conf_get_string(pcm_cfg, "format", NULL, "S16_LE");
+	format = snd_pcm_format_value(cs);
+	if (format == SND_PCM_FORMAT_UNKNOWN)
+		ksft_exit_fail_msg("Wrong format '%s'\n", cs);
+	conf_get_string_array(pcm_cfg, "alt_formats", NULL,
+				alt_formats, ARRAY_SIZE(alt_formats), NULL);
+	rate = conf_get_long(pcm_cfg, "rate", NULL, 48000);
+	channels = conf_get_long(pcm_cfg, "channels", NULL, 2);
+	period_size = conf_get_long(pcm_cfg, "period_size", NULL, 4096);
+	buffer_size = conf_get_long(pcm_cfg, "buffer_size", NULL, 16384);
+
+	samples = malloc((rate * channels * snd_pcm_format_physical_width(format)) / 8);
+	if (!samples)
+		ksft_exit_fail_msg("Out of memory\n");
+	snd_pcm_format_set_silence(format, samples, rate * channels);
+
+	sprintf(name, "hw:%d,%d,%d", data->card, data->device, data->subdevice);
+	err = snd_pcm_open(&handle, name, data->stream, 0);
+	if (err < 0) {
+		snprintf(msg, sizeof(msg), "Failed to get pcm handle: %s", snd_strerror(err));
+		goto __close;
+	}
+
+	err = snd_pcm_hw_params_any(handle, hw_params);
+	if (err < 0) {
+		snprintf(msg, sizeof(msg), "snd_pcm_hw_params_any: %s", snd_strerror(err));
+		goto __close;
+	}
+	err = snd_pcm_hw_params_set_rate_resample(handle, hw_params, 0);
+	if (err < 0) {
+		snprintf(msg, sizeof(msg), "snd_pcm_hw_params_set_rate_resample: %s", snd_strerror(err));
+		goto __close;
+	}
+	err = snd_pcm_hw_params_set_access(handle, hw_params, access);
+	if (err < 0) {
+		snprintf(msg, sizeof(msg), "snd_pcm_hw_params_set_access %s: %s",
+					   snd_pcm_access_name(access), snd_strerror(err));
+		goto __close;
+	}
+	i = -1;
+__format:
+	err = snd_pcm_hw_params_set_format(handle, hw_params, format);
+	if (err < 0) {
+		i++;
+		if (i < ARRAY_SIZE(alt_formats) && alt_formats[i]) {
+			old_format = format;
+			format = snd_pcm_format_value(alt_formats[i]);
+			if (format != SND_PCM_FORMAT_UNKNOWN) {
+				ksft_print_msg("%s.%d.%d.%d.%s.%s format %s -> %s\n",
+						 test_name,
+						 data->card, data->device, data->subdevice,
+						 snd_pcm_stream_name(data->stream),
+						 snd_pcm_access_name(access),
+						 snd_pcm_format_name(old_format),
+						 snd_pcm_format_name(format));
+				samples = realloc(samples, (rate * channels *
+							    snd_pcm_format_physical_width(format)) / 8);
+				if (!samples)
+					ksft_exit_fail_msg("Out of memory\n");
+				snd_pcm_format_set_silence(format, samples, rate * channels);
+				goto __format;
+			}
+		}
+		snprintf(msg, sizeof(msg), "snd_pcm_hw_params_set_format %s: %s",
+					   snd_pcm_format_name(format), snd_strerror(err));
+		goto __close;
+	}
+	err = snd_pcm_hw_params_set_channels(handle, hw_params, channels);
+	if (err < 0) {
+		snprintf(msg, sizeof(msg), "snd_pcm_hw_params_set_channels %ld: %s", channels, snd_strerror(err));
+		goto __close;
+	}
+	rrate = rate;
+	err = snd_pcm_hw_params_set_rate_near(handle, hw_params, &rrate, 0);
+	if (err < 0) {
+		snprintf(msg, sizeof(msg), "snd_pcm_hw_params_set_rate %ld: %s", rate, snd_strerror(err));
+		goto __close;
+	}
+	if (rrate != rate) {
+		snprintf(msg, sizeof(msg), "rate mismatch %ld != %d", rate, rrate);
+		goto __close;
+	}
+	rperiod_size = period_size;
+	err = snd_pcm_hw_params_set_period_size_near(handle, hw_params, &rperiod_size, 0);
+	if (err < 0) {
+		snprintf(msg, sizeof(msg), "snd_pcm_hw_params_set_period_size %ld: %s", period_size, snd_strerror(err));
+		goto __close;
+	}
+	rbuffer_size = buffer_size;
+	err = snd_pcm_hw_params_set_buffer_size_near(handle, hw_params, &rbuffer_size);
+	if (err < 0) {
+		snprintf(msg, sizeof(msg), "snd_pcm_hw_params_set_buffer_size %ld: %s", buffer_size, snd_strerror(err));
+		goto __close;
+	}
+	err = snd_pcm_hw_params(handle, hw_params);
+	if (err < 0) {
+		snprintf(msg, sizeof(msg), "snd_pcm_hw_params: %s", snd_strerror(err));
+		goto __close;
+	}
+
+	err = snd_pcm_sw_params_current(handle, sw_params);
+	if (err < 0) {
+		snprintf(msg, sizeof(msg), "snd_pcm_sw_params_current: %s", snd_strerror(err));
+		goto __close;
+	}
+	if (data->stream == SND_PCM_STREAM_PLAYBACK) {
+		start_threshold = (rbuffer_size / rperiod_size) * rperiod_size;
+	} else {
+		start_threshold = rperiod_size;
+	}
+	err = snd_pcm_sw_params_set_start_threshold(handle, sw_params, start_threshold);
+	if (err < 0) {
+		snprintf(msg, sizeof(msg), "snd_pcm_sw_params_set_start_threshold %ld: %s", (long)start_threshold, snd_strerror(err));
+		goto __close;
+	}
+	err = snd_pcm_sw_params_set_avail_min(handle, sw_params, rperiod_size);
+	if (err < 0) {
+		snprintf(msg, sizeof(msg), "snd_pcm_sw_params_set_avail_min %ld: %s", (long)rperiod_size, snd_strerror(err));
+		goto __close;
+	}
+	err = snd_pcm_sw_params(handle, sw_params);
+	if (err < 0) {
+		snprintf(msg, sizeof(msg), "snd_pcm_sw_params: %s", snd_strerror(err));
+		goto __close;
+	}
+
+	ksft_print_msg("%s.%s.%d.%d.%d.%s hw_params.%s.%s.%ld.%ld.%ld.%ld sw_params.%ld\n",
+		         test_class_name, test_name,
+			 data->card, data->device, data->subdevice,
+			 snd_pcm_stream_name(data->stream),
+			 snd_pcm_access_name(access),
+			 snd_pcm_format_name(format),
+			 (long)rate, (long)channels,
+			 (long)rperiod_size, (long)rbuffer_size,
+			 (long)start_threshold);
+
+	/* Set all the params, actually run the test */
+	skip = false;
+
+	timestamp_now(&tstamp);
+	for (i = 0; i < duration_s; i++) {
+		if (data->stream == SND_PCM_STREAM_PLAYBACK) {
+			frames = snd_pcm_writei(handle, samples, rate);
+			if (frames < 0) {
+				snprintf(msg, sizeof(msg),
+					 "Write failed: expected %ld, wrote %li", rate, frames);
+				goto __close;
+			}
+			if (frames < rate) {
+				snprintf(msg, sizeof(msg),
+					 "expected %ld, wrote %li", rate, frames);
+				goto __close;
+			}
+		} else {
+			frames = snd_pcm_readi(handle, samples, rate);
+			if (frames < 0) {
+				snprintf(msg, sizeof(msg),
+					 "expected %ld, wrote %li", rate, frames);
+				goto __close;
+			}
+			if (frames < rate) {
+				snprintf(msg, sizeof(msg),
+					 "expected %ld, wrote %li", rate, frames);
+				goto __close;
+			}
+		}
+	}
+
+	snd_pcm_drain(handle);
+	ms = timestamp_diff_ms(&tstamp);
+	if (ms < duration_ms - margin_ms || ms > duration_ms + margin_ms) {
+		snprintf(msg, sizeof(msg), "time mismatch: expected %dms got %lld", duration_ms, ms);
+		goto __close;
+	}
+
+	msg[0] = '\0';
+	pass = true;
+__close:
+	pthread_mutex_lock(&results_lock);
+
+	switch (class) {
+	case TEST_CLASS_SYSTEM:
+		test_class_name = "system";
+		/*
+		 * Anything specified as specific to this system
+		 * should always be supported.
+		 */
+		ksft_test_result(!skip, "%s.%s.%d.%d.%d.%s.params\n",
+				 test_class_name, test_name,
+				 data->card, data->device, data->subdevice,
+				 snd_pcm_stream_name(data->stream));
+		break;
+	default:
+		break;
+	}
+
+	if (!skip)
+		ksft_test_result(pass, "%s.%s.%d.%d.%d.%s\n",
+				 test_class_name, test_name,
+				 data->card, data->device, data->subdevice,
+				 snd_pcm_stream_name(data->stream));
+	else
+		ksft_test_result_skip("%s.%s.%d.%d.%d.%s\n",
+				 test_class_name, test_name,
+				 data->card, data->device, data->subdevice,
+				 snd_pcm_stream_name(data->stream));
+
+	if (msg[0])
+		ksft_print_msg("%s\n", msg);
+
+	pthread_mutex_unlock(&results_lock);
+
+	free(samples);
+	if (handle)
+		snd_pcm_close(handle);
+}
+
+void run_time_tests(struct pcm_data *pcm, enum test_class class,
+		    snd_config_t *cfg)
+{
+	const char *test_name, *test_type;
+	snd_config_t *pcm_cfg;
+	snd_config_iterator_t i, next;
+
+	if (!cfg)
+		return;
+
+	cfg = conf_get_subtree(cfg, "test", NULL);
+	if (cfg == NULL)
+		return;
+
+	snd_config_for_each(i, next, cfg) {
+		pcm_cfg = snd_config_iterator_entry(i);
+		if (snd_config_get_id(pcm_cfg, &test_name) < 0)
+			ksft_exit_fail_msg("snd_config_get_id\n");
+		test_type = conf_get_string(pcm_cfg, "type", NULL, "time");
+		if (strcmp(test_type, "time") == 0)
+			test_pcm_time(pcm, class, test_name, pcm_cfg);
+		else
+			ksft_exit_fail_msg("unknown test type '%s'\n", test_type);
+	}
+}
+
+void *card_thread(void *data)
+{
+	struct card_data *card = data;
+	struct pcm_data *pcm;
+
+	for (pcm = pcm_list; pcm != NULL; pcm = pcm->next) {
+		if (pcm->card != card->card)
+			continue;
+
+		run_time_tests(pcm, TEST_CLASS_DEFAULT, default_pcm_config);
+		run_time_tests(pcm, TEST_CLASS_SYSTEM, pcm->pcm_config);
+	}
+
+	return 0;
+}
+
+int main(void)
+{
+	struct card_data *card;
+	struct pcm_data *pcm;
+	snd_config_t *global_config, *cfg;
+	int num_pcm_tests = 0, num_tests, num_std_pcm_tests;
+	int ret;
+	void *thread_ret;
+
+	ksft_print_header();
+
+	global_config = conf_load_from_file("pcm-test.conf");
+	default_pcm_config = conf_get_subtree(global_config, "pcm", NULL);
+	if (default_pcm_config == NULL)
+		ksft_exit_fail_msg("default pcm test configuration (pcm compound) is missing\n");
+
+	conf_load();
+
+	find_pcms();
+
+	num_std_pcm_tests = conf_get_count(default_pcm_config, "test", NULL);
+
+	for (pcm = pcm_list; pcm != NULL; pcm = pcm->next) {
+		num_pcm_tests += num_std_pcm_tests;
+		cfg = pcm->pcm_config;
+		if (cfg == NULL)
+			continue;
+		/* Setting params is reported as a separate test */
+		num_tests = conf_get_count(cfg, "test", NULL) * 2;
+		if (num_tests > 0)
+			num_pcm_tests += num_tests;
+	}
+
+	ksft_set_plan(num_missing + num_pcm_tests);
+
+	for (pcm = pcm_missing; pcm != NULL; pcm = pcm->next) {
+		ksft_test_result(false, "test.missing.%d.%d.%d.%s\n",
+				 pcm->card, pcm->device, pcm->subdevice,
+				 snd_pcm_stream_name(pcm->stream));
+	}
+
+	for (card = card_list; card != NULL; card = card->next) {
+		ret = pthread_create(&card->thread, NULL, card_thread, card);
+		if (ret != 0) {
+			ksft_exit_fail_msg("Failed to create card %d thread: %d (%s)\n",
+					   card->card, ret,
+					   strerror(errno));
+		}
+	}
+
+	for (card = card_list; card != NULL; card = card->next) {
+		ret = pthread_join(card->thread, &thread_ret);
+		if (ret != 0) {
+			ksft_exit_fail_msg("Failed to join card %d thread: %d (%s)\n",
+					   card->card, ret,
+					   strerror(errno));
+		}
+	}
+
+	snd_config_delete(global_config);
+	conf_free();
+
+	ksft_exit_pass();
+
+	return 0;
+}
diff --git a/tools/testing/selftests/alsa/pcm-test.conf b/tools/testing/selftests/alsa/pcm-test.conf
new file mode 100644
index 0000000000..71bd3f78a6
--- /dev/null
+++ b/tools/testing/selftests/alsa/pcm-test.conf
@@ -0,0 +1,63 @@
+pcm.test.time1 {
+	description "8kHz mono large periods"
+	format S16_LE
+	alt_formats [ S32_LE ]
+	rate 8000
+	channels 1
+	period_size 8000
+	buffer_size 32000
+}
+pcm.test.time2 {
+	description "8kHz stereo large periods"
+	format S16_LE
+	alt_formats [ S32_LE ]
+	rate 8000
+	channels 2
+	period_size 8000
+	buffer_size 32000
+}
+pcm.test.time3 {
+	description "44.1kHz stereo large periods"
+	format S16_LE
+	alt_formats [ S32_LE ]
+	rate 44100
+	channels 2
+	period_size 22500
+	buffer_size 192000
+}
+pcm.test.time4 {
+	description "48kHz stereo small periods"
+	format S16_LE
+	alt_formats [ S32_LE ]
+	rate 48000
+	channels 2
+	period_size 512
+	buffer_size 4096
+}
+pcm.test.time5 {
+	description "48kHz stereo large periods"
+	format S16_LE
+	alt_formats [ S32_LE ]
+	rate 48000
+	channels 2
+	period_size 24000
+	buffer_size 192000
+}
+pcm.test.time6 {
+	description "48kHz 6 channel large periods"
+	format S16_LE
+	alt_formats [ S32_LE ]
+	rate 48000
+	channels 2
+	period_size 48000
+	buffer_size 576000
+}
+pcm.test.time7 {
+	description "96kHz stereo large periods"
+	format S16_LE
+	alt_formats [ S32_LE ]
+	rate 96000
+	channels 2
+	period_size 48000
+	buffer_size 192000
+}
diff --git a/tools/testing/selftests/alsa/test-pcmtest-driver.c b/tools/testing/selftests/alsa/test-pcmtest-driver.c
new file mode 100644
index 0000000000..a52ecd43db
--- /dev/null
+++ b/tools/testing/selftests/alsa/test-pcmtest-driver.c
@@ -0,0 +1,330 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * This is the test which covers PCM middle layer data transferring using
+ * the virtual pcm test driver (snd-pcmtest).
+ *
+ * Copyright 2023 Ivan Orlov <ivan.orlov0322@gmail.com>
+ */
+#include <string.h>
+#include <alsa/asoundlib.h>
+#include "../kselftest_harness.h"
+
+#define CH_NUM 4
+
+struct pattern_buf {
+	char buf[1024];
+	int len;
+};
+
+struct pattern_buf patterns[CH_NUM];
+
+struct pcmtest_test_params {
+	unsigned long buffer_size;
+	unsigned long period_size;
+	unsigned long channels;
+	unsigned int rate;
+	snd_pcm_access_t access;
+	size_t sec_buf_len;
+	size_t sample_size;
+	int time;
+	snd_pcm_format_t format;
+};
+
+static int read_patterns(void)
+{
+	FILE *fp, *fpl;
+	int i;
+	char pf[64];
+	char plf[64];
+
+	for (i = 0; i < CH_NUM; i++) {
+		sprintf(plf, "/sys/kernel/debug/pcmtest/fill_pattern%d_len", i);
+		fpl = fopen(plf, "r");
+		if (!fpl)
+			return -1;
+		fscanf(fpl, "%u", &patterns[i].len);
+		fclose(fpl);
+
+		sprintf(pf, "/sys/kernel/debug/pcmtest/fill_pattern%d", i);
+		fp = fopen(pf, "r");
+		if (!fp)
+			return -1;
+		fread(patterns[i].buf, 1, patterns[i].len, fp);
+		fclose(fp);
+	}
+
+	return 0;
+}
+
+static int get_test_results(char *debug_name)
+{
+	int result;
+	FILE *f;
+	char fname[128];
+
+	sprintf(fname, "/sys/kernel/debug/pcmtest/%s", debug_name);
+
+	f = fopen(fname, "r");
+	if (!f) {
+		printf("Failed to open file\n");
+		return -1;
+	}
+	fscanf(f, "%d", &result);
+	fclose(f);
+
+	return result;
+}
+
+static size_t get_sec_buf_len(unsigned int rate, unsigned long channels, snd_pcm_format_t format)
+{
+	return rate * channels * snd_pcm_format_physical_width(format) / 8;
+}
+
+static int setup_handle(snd_pcm_t **handle, snd_pcm_sw_params_t *swparams,
+			snd_pcm_hw_params_t *hwparams, struct pcmtest_test_params *params,
+			int card, snd_pcm_stream_t stream)
+{
+	char pcm_name[32];
+	int err;
+
+	sprintf(pcm_name, "hw:%d,0,0", card);
+	err = snd_pcm_open(handle, pcm_name, stream, 0);
+	if (err < 0)
+		return err;
+	snd_pcm_hw_params_any(*handle, hwparams);
+	snd_pcm_hw_params_set_rate_resample(*handle, hwparams, 0);
+	snd_pcm_hw_params_set_access(*handle, hwparams, params->access);
+	snd_pcm_hw_params_set_format(*handle, hwparams, params->format);
+	snd_pcm_hw_params_set_channels(*handle, hwparams, params->channels);
+	snd_pcm_hw_params_set_rate_near(*handle, hwparams, &params->rate, 0);
+	snd_pcm_hw_params_set_period_size_near(*handle, hwparams, &params->period_size, 0);
+	snd_pcm_hw_params_set_buffer_size_near(*handle, hwparams, &params->buffer_size);
+	snd_pcm_hw_params(*handle, hwparams);
+	snd_pcm_sw_params_current(*handle, swparams);
+
+	snd_pcm_hw_params_set_rate_resample(*handle, hwparams, 0);
+	snd_pcm_sw_params_set_avail_min(*handle, swparams, params->period_size);
+	snd_pcm_hw_params_set_buffer_size_near(*handle, hwparams, &params->buffer_size);
+	snd_pcm_hw_params_set_period_size_near(*handle, hwparams, &params->period_size, 0);
+	snd_pcm_sw_params(*handle, swparams);
+	snd_pcm_hw_params(*handle, hwparams);
+
+	return 0;
+}
+
+FIXTURE(pcmtest) {
+	int card;
+	snd_pcm_sw_params_t *swparams;
+	snd_pcm_hw_params_t *hwparams;
+	struct pcmtest_test_params params;
+};
+
+FIXTURE_TEARDOWN(pcmtest) {
+}
+
+FIXTURE_SETUP(pcmtest) {
+	char *card_name;
+	int err;
+
+	if (geteuid())
+		SKIP(exit(-1), "This test needs root to run!");
+
+	err = read_patterns();
+	if (err)
+		SKIP(exit(-1), "Can't read patterns. Probably, module isn't loaded");
+
+	card_name = malloc(127);
+	ASSERT_NE(card_name, NULL);
+	self->params.buffer_size = 16384;
+	self->params.period_size = 4096;
+	self->params.channels = CH_NUM;
+	self->params.rate = 8000;
+	self->params.access = SND_PCM_ACCESS_RW_INTERLEAVED;
+	self->params.format = SND_PCM_FORMAT_S16_LE;
+	self->card = -1;
+	self->params.sample_size = snd_pcm_format_physical_width(self->params.format) / 8;
+
+	self->params.sec_buf_len = get_sec_buf_len(self->params.rate, self->params.channels,
+						   self->params.format);
+	self->params.time = 4;
+
+	while (snd_card_next(&self->card) >= 0) {
+		if (self->card == -1)
+			break;
+		snd_card_get_name(self->card, &card_name);
+		if (!strcmp(card_name, "PCM-Test"))
+			break;
+	}
+	free(card_name);
+	ASSERT_NE(self->card, -1);
+}
+
+/*
+ * Here we are trying to send the looped monotonically increasing sequence of bytes to the driver.
+ * If our data isn't corrupted, the driver will set the content of 'pc_test' debugfs file to '1'
+ */
+TEST_F(pcmtest, playback) {
+	snd_pcm_t *handle;
+	unsigned char *it;
+	size_t write_res;
+	int test_results;
+	int i, cur_ch, pos_in_ch;
+	void *samples;
+	struct pcmtest_test_params *params = &self->params;
+
+	samples = calloc(self->params.sec_buf_len * self->params.time, 1);
+	ASSERT_NE(samples, NULL);
+
+	snd_pcm_sw_params_alloca(&self->swparams);
+	snd_pcm_hw_params_alloca(&self->hwparams);
+
+	ASSERT_EQ(setup_handle(&handle, self->swparams, self->hwparams, params,
+			       self->card, SND_PCM_STREAM_PLAYBACK), 0);
+	snd_pcm_format_set_silence(params->format, samples,
+				   params->rate * params->channels * params->time);
+	it = samples;
+	for (i = 0; i < self->params.sec_buf_len * params->time; i++) {
+		cur_ch = (i / params->sample_size) % CH_NUM;
+		pos_in_ch = i / params->sample_size / CH_NUM * params->sample_size
+			    + (i % params->sample_size);
+		it[i] = patterns[cur_ch].buf[pos_in_ch % patterns[cur_ch].len];
+	}
+	write_res = snd_pcm_writei(handle, samples, params->rate * params->time);
+	ASSERT_GE(write_res, 0);
+
+	snd_pcm_close(handle);
+	free(samples);
+	test_results = get_test_results("pc_test");
+	ASSERT_EQ(test_results, 1);
+}
+
+/*
+ * Here we test that the virtual alsa driver returns looped and monotonically increasing sequence
+ * of bytes. In the interleaved mode the buffer will contain samples in the following order:
+ * C0, C1, C2, C3, C0, C1, ...
+ */
+TEST_F(pcmtest, capture) {
+	snd_pcm_t *handle;
+	unsigned char *it;
+	size_t read_res;
+	int i, cur_ch, pos_in_ch;
+	void *samples;
+	struct pcmtest_test_params *params = &self->params;
+
+	samples = calloc(self->params.sec_buf_len * self->params.time, 1);
+	ASSERT_NE(samples, NULL);
+
+	snd_pcm_sw_params_alloca(&self->swparams);
+	snd_pcm_hw_params_alloca(&self->hwparams);
+
+	ASSERT_EQ(setup_handle(&handle, self->swparams, self->hwparams,
+			       params, self->card, SND_PCM_STREAM_CAPTURE), 0);
+	snd_pcm_format_set_silence(params->format, samples,
+				   params->rate * params->channels * params->time);
+	read_res = snd_pcm_readi(handle, samples, params->rate * params->time);
+	ASSERT_GE(read_res, 0);
+	snd_pcm_close(handle);
+	it = (unsigned char *)samples;
+	for (i = 0; i < self->params.sec_buf_len * self->params.time; i++) {
+		cur_ch = (i / params->sample_size) % CH_NUM;
+		pos_in_ch = i / params->sample_size / CH_NUM * params->sample_size
+			    + (i % params->sample_size);
+		ASSERT_EQ(it[i], patterns[cur_ch].buf[pos_in_ch % patterns[cur_ch].len]);
+	}
+	free(samples);
+}
+
+// Test capture in the non-interleaved access mode. The are buffers for each recorded channel
+TEST_F(pcmtest, ni_capture) {
+	snd_pcm_t *handle;
+	struct pcmtest_test_params params = self->params;
+	char **chan_samples;
+	size_t i, j, read_res;
+
+	chan_samples = calloc(CH_NUM, sizeof(*chan_samples));
+	ASSERT_NE(chan_samples, NULL);
+
+	snd_pcm_sw_params_alloca(&self->swparams);
+	snd_pcm_hw_params_alloca(&self->hwparams);
+
+	params.access = SND_PCM_ACCESS_RW_NONINTERLEAVED;
+
+	ASSERT_EQ(setup_handle(&handle, self->swparams, self->hwparams,
+			       &params, self->card, SND_PCM_STREAM_CAPTURE), 0);
+
+	for (i = 0; i < CH_NUM; i++)
+		chan_samples[i] = calloc(params.sec_buf_len * params.time, 1);
+
+	for (i = 0; i < 1; i++) {
+		read_res = snd_pcm_readn(handle, (void **)chan_samples, params.rate * params.time);
+		ASSERT_GE(read_res, 0);
+	}
+	snd_pcm_close(handle);
+
+	for (i = 0; i < CH_NUM; i++) {
+		for (j = 0; j < params.rate * params.time; j++)
+			ASSERT_EQ(chan_samples[i][j], patterns[i].buf[j % patterns[i].len]);
+		free(chan_samples[i]);
+	}
+	free(chan_samples);
+}
+
+TEST_F(pcmtest, ni_playback) {
+	snd_pcm_t *handle;
+	struct pcmtest_test_params params = self->params;
+	char **chan_samples;
+	size_t i, j, read_res;
+	int test_res;
+
+	chan_samples = calloc(CH_NUM, sizeof(*chan_samples));
+	ASSERT_NE(chan_samples, NULL);
+
+	snd_pcm_sw_params_alloca(&self->swparams);
+	snd_pcm_hw_params_alloca(&self->hwparams);
+
+	params.access = SND_PCM_ACCESS_RW_NONINTERLEAVED;
+
+	ASSERT_EQ(setup_handle(&handle, self->swparams, self->hwparams,
+			       &params, self->card, SND_PCM_STREAM_PLAYBACK), 0);
+
+	for (i = 0; i < CH_NUM; i++) {
+		chan_samples[i] = calloc(params.sec_buf_len * params.time, 1);
+		for (j = 0; j < params.sec_buf_len * params.time; j++)
+			chan_samples[i][j] = patterns[i].buf[j % patterns[i].len];
+	}
+
+	for (i = 0; i < 1; i++) {
+		read_res = snd_pcm_writen(handle, (void **)chan_samples, params.rate * params.time);
+		ASSERT_GE(read_res, 0);
+	}
+
+	snd_pcm_close(handle);
+	test_res = get_test_results("pc_test");
+	ASSERT_EQ(test_res, 1);
+
+	for (i = 0; i < CH_NUM; i++)
+		free(chan_samples[i]);
+	free(chan_samples);
+}
+
+/*
+ * Here we are testing the custom ioctl definition inside the virtual driver. If it triggers
+ * successfully, the driver sets the content of 'ioctl_test' debugfs file to '1'.
+ */
+TEST_F(pcmtest, reset_ioctl) {
+	snd_pcm_t *handle;
+	int test_res;
+	struct pcmtest_test_params *params = &self->params;
+
+	snd_pcm_sw_params_alloca(&self->swparams);
+	snd_pcm_hw_params_alloca(&self->hwparams);
+
+	ASSERT_EQ(setup_handle(&handle, self->swparams, self->hwparams, params,
+			       self->card, SND_PCM_STREAM_CAPTURE), 0);
+	snd_pcm_reset(handle);
+	test_res = get_test_results("ioctl_test");
+	ASSERT_EQ(test_res, 1);
+	snd_pcm_close(handle);
+}
+
+TEST_HARNESS_MAIN