--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Sound core KUnit test
+ * Author: Ivan Orlov <ivan.orlov0322@gmail.com>
+ */
+
+#include <kunit/test.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+
+#define SILENCE_BUFFER_SIZE 2048
+#define SILENCE(...) { __VA_ARGS__ }
+#define DEFINE_FORMAT(fmt, pbits, wd, endianness, signd, silence_arr) { \
+ .format = SNDRV_PCM_FORMAT_##fmt, .physical_bits = pbits, \
+ .width = wd, .le = endianness, .sd = signd, .silence = silence_arr, \
+ .name = #fmt, \
+}
+
+#define WRONG_FORMAT (SNDRV_PCM_FORMAT_LAST + 1)
+
+#define VALID_NAME "ValidName"
+#define NAME_W_SPEC_CHARS "In%v@1id name"
+#define NAME_W_SPACE "Test name"
+#define NAME_W_SPACE_REMOVED "Testname"
+
+#define TEST_FIRST_COMPONENT "Component1"
+#define TEST_SECOND_COMPONENT "Component2"
+
+struct snd_format_test_data {
+ snd_pcm_format_t format;
+ int physical_bits;
+ int width;
+ int le;
+ int sd;
+ unsigned char silence[8];
+ unsigned char *name;
+};
+
+struct avail_test_data {
+ snd_pcm_uframes_t buffer_size;
+ snd_pcm_uframes_t hw_ptr;
+ snd_pcm_uframes_t appl_ptr;
+ snd_pcm_uframes_t expected_avail;
+};
+
+static struct snd_format_test_data valid_fmt[] = {
+ DEFINE_FORMAT(S8, 8, 8, -1, 1, SILENCE()),
+ DEFINE_FORMAT(U8, 8, 8, -1, 0, SILENCE(0x80)),
+ DEFINE_FORMAT(S16_LE, 16, 16, 1, 1, SILENCE()),
+ DEFINE_FORMAT(S16_BE, 16, 16, 0, 1, SILENCE()),
+ DEFINE_FORMAT(U16_LE, 16, 16, 1, 0, SILENCE(0x00, 0x80)),
+ DEFINE_FORMAT(U16_BE, 16, 16, 0, 0, SILENCE(0x80, 0x00)),
+ DEFINE_FORMAT(S24_LE, 32, 24, 1, 1, SILENCE()),
+ DEFINE_FORMAT(S24_BE, 32, 24, 0, 1, SILENCE()),
+ DEFINE_FORMAT(U24_LE, 32, 24, 1, 0, SILENCE(0x00, 0x00, 0x80)),
+ DEFINE_FORMAT(U24_BE, 32, 24, 0, 0, SILENCE(0x00, 0x80, 0x00, 0x00)),
+ DEFINE_FORMAT(S32_LE, 32, 32, 1, 1, SILENCE()),
+ DEFINE_FORMAT(S32_BE, 32, 32, 0, 1, SILENCE()),
+ DEFINE_FORMAT(U32_LE, 32, 32, 1, 0, SILENCE(0x00, 0x00, 0x00, 0x80)),
+ DEFINE_FORMAT(U32_BE, 32, 32, 0, 0, SILENCE(0x80, 0x00, 0x00, 0x00)),
+ DEFINE_FORMAT(FLOAT_LE, 32, 32, 1, -1, SILENCE()),
+ DEFINE_FORMAT(FLOAT_BE, 32, 32, 0, -1, SILENCE()),
+ DEFINE_FORMAT(FLOAT64_LE, 64, 64, 1, -1, SILENCE()),
+ DEFINE_FORMAT(FLOAT64_BE, 64, 64, 0, -1, SILENCE()),
+ DEFINE_FORMAT(IEC958_SUBFRAME_LE, 32, 32, 1, -1, SILENCE()),
+ DEFINE_FORMAT(IEC958_SUBFRAME_BE, 32, 32, 0, -1, SILENCE()),
+ DEFINE_FORMAT(MU_LAW, 8, 8, -1, -1, SILENCE(0x7f)),
+ DEFINE_FORMAT(A_LAW, 8, 8, -1, -1, SILENCE(0x55)),
+ DEFINE_FORMAT(IMA_ADPCM, 4, 4, -1, -1, SILENCE()),
+ DEFINE_FORMAT(G723_24, 3, 3, -1, -1, SILENCE()),
+ DEFINE_FORMAT(G723_40, 5, 5, -1, -1, SILENCE()),
+ DEFINE_FORMAT(DSD_U8, 8, 8, 1, 0, SILENCE(0x69)),
+ DEFINE_FORMAT(DSD_U16_LE, 16, 16, 1, 0, SILENCE(0x69, 0x69)),
+ DEFINE_FORMAT(DSD_U32_LE, 32, 32, 1, 0, SILENCE(0x69, 0x69, 0x69, 0x69)),
+ DEFINE_FORMAT(DSD_U16_BE, 16, 16, 0, 0, SILENCE(0x69, 0x69)),
+ DEFINE_FORMAT(DSD_U32_BE, 32, 32, 0, 0, SILENCE(0x69, 0x69, 0x69, 0x69)),
+ DEFINE_FORMAT(S20_LE, 32, 20, 1, 1, SILENCE()),
+ DEFINE_FORMAT(S20_BE, 32, 20, 0, 1, SILENCE()),
+ DEFINE_FORMAT(U20_LE, 32, 20, 1, 0, SILENCE(0x00, 0x00, 0x08, 0x00)),
+ DEFINE_FORMAT(U20_BE, 32, 20, 0, 0, SILENCE(0x00, 0x08, 0x00, 0x00)),
+ DEFINE_FORMAT(S24_3LE, 24, 24, 1, 1, SILENCE()),
+ DEFINE_FORMAT(S24_3BE, 24, 24, 0, 1, SILENCE()),
+ DEFINE_FORMAT(U24_3LE, 24, 24, 1, 0, SILENCE(0x00, 0x00, 0x80)),
+ DEFINE_FORMAT(U24_3BE, 24, 24, 0, 0, SILENCE(0x80, 0x00, 0x00)),
+ DEFINE_FORMAT(S20_3LE, 24, 20, 1, 1, SILENCE()),
+ DEFINE_FORMAT(S20_3BE, 24, 20, 0, 1, SILENCE()),
+ DEFINE_FORMAT(U20_3LE, 24, 20, 1, 0, SILENCE(0x00, 0x00, 0x08)),
+ DEFINE_FORMAT(U20_3BE, 24, 20, 0, 0, SILENCE(0x08, 0x00, 0x00)),
+ DEFINE_FORMAT(S18_3LE, 24, 18, 1, 1, SILENCE()),
+ DEFINE_FORMAT(S18_3BE, 24, 18, 0, 1, SILENCE()),
+ DEFINE_FORMAT(U18_3LE, 24, 18, 1, 0, SILENCE(0x00, 0x00, 0x02)),
+ DEFINE_FORMAT(U18_3BE, 24, 18, 0, 0, SILENCE(0x02, 0x00, 0x00)),
+ DEFINE_FORMAT(G723_24_1B, 8, 3, -1, -1, SILENCE()),
+ DEFINE_FORMAT(G723_40_1B, 8, 5, -1, -1, SILENCE()),
+};
+
+static void test_phys_format_size(struct kunit *test)
+{
+ u32 i;
+
+ for (i = 0; i < ARRAY_SIZE(valid_fmt); i++) {
+ KUNIT_EXPECT_EQ(test, snd_pcm_format_physical_width(valid_fmt[i].format),
+ valid_fmt[i].physical_bits);
+ }
+
+ KUNIT_EXPECT_EQ(test, snd_pcm_format_physical_width(WRONG_FORMAT), -EINVAL);
+ KUNIT_EXPECT_EQ(test, snd_pcm_format_physical_width(-1), -EINVAL);
+}
+
+static void test_format_width(struct kunit *test)
+{
+ u32 i;
+
+ for (i = 0; i < ARRAY_SIZE(valid_fmt); i++) {
+ KUNIT_EXPECT_EQ(test, snd_pcm_format_width(valid_fmt[i].format),
+ valid_fmt[i].width);
+ }
+
+ KUNIT_EXPECT_EQ(test, snd_pcm_format_width(WRONG_FORMAT), -EINVAL);
+ KUNIT_EXPECT_EQ(test, snd_pcm_format_width(-1), -EINVAL);
+}
+
+static void test_format_signed(struct kunit *test)
+{
+ u32 i;
+
+ for (i = 0; i < ARRAY_SIZE(valid_fmt); i++) {
+ KUNIT_EXPECT_EQ(test, snd_pcm_format_signed(valid_fmt[i].format),
+ valid_fmt[i].sd < 0 ? -EINVAL : valid_fmt[i].sd);
+ KUNIT_EXPECT_EQ(test, snd_pcm_format_unsigned(valid_fmt[i].format),
+ valid_fmt[i].sd < 0 ? -EINVAL : 1 - valid_fmt[i].sd);
+ }
+
+ KUNIT_EXPECT_EQ(test, snd_pcm_format_width(WRONG_FORMAT), -EINVAL);
+ KUNIT_EXPECT_EQ(test, snd_pcm_format_width(-1), -EINVAL);
+}
+
+static void test_format_endianness(struct kunit *test)
+{
+ u32 i;
+
+ for (i = 0; i < ARRAY_SIZE(valid_fmt); i++) {
+ KUNIT_EXPECT_EQ(test, snd_pcm_format_little_endian(valid_fmt[i].format),
+ valid_fmt[i].le < 0 ? -EINVAL : valid_fmt[i].le);
+ KUNIT_EXPECT_EQ(test, snd_pcm_format_big_endian(valid_fmt[i].format),
+ valid_fmt[i].le < 0 ? -EINVAL : 1 - valid_fmt[i].le);
+ }
+
+ KUNIT_EXPECT_EQ(test, snd_pcm_format_little_endian(WRONG_FORMAT), -EINVAL);
+ KUNIT_EXPECT_EQ(test, snd_pcm_format_little_endian(-1), -EINVAL);
+ KUNIT_EXPECT_EQ(test, snd_pcm_format_big_endian(WRONG_FORMAT), -EINVAL);
+ KUNIT_EXPECT_EQ(test, snd_pcm_format_big_endian(-1), -EINVAL);
+}
+
+static void _test_fill_silence(struct kunit *test, struct snd_format_test_data *data,
+ u8 *buffer, size_t samples_count)
+{
+ size_t sample_bytes = data->physical_bits >> 3;
+ u32 i;
+
+ KUNIT_ASSERT_EQ(test, snd_pcm_format_set_silence(data->format, buffer, samples_count), 0);
+ for (i = 0; i < samples_count * sample_bytes; i++)
+ KUNIT_EXPECT_EQ(test, buffer[i], data->silence[i % sample_bytes]);
+}
+
+static void test_format_fill_silence(struct kunit *test)
+{
+ u32 buf_samples[] = { 10, 20, 32, 64, 129, 260 };
+ u8 *buffer;
+ u32 i, j;
+
+ buffer = kunit_kzalloc(test, SILENCE_BUFFER_SIZE, GFP_KERNEL);
+
+ for (i = 0; i < ARRAY_SIZE(buf_samples); i++) {
+ for (j = 0; j < ARRAY_SIZE(valid_fmt); j++)
+ _test_fill_silence(test, &valid_fmt[j], buffer, buf_samples[i]);
+ }
+
+ KUNIT_EXPECT_EQ(test, snd_pcm_format_set_silence(WRONG_FORMAT, buffer, 20), -EINVAL);
+ KUNIT_EXPECT_EQ(test, snd_pcm_format_set_silence(SNDRV_PCM_FORMAT_LAST, buffer, 0), 0);
+}
+
+static snd_pcm_uframes_t calculate_boundary(snd_pcm_uframes_t buffer_size)
+{
+ snd_pcm_uframes_t boundary = buffer_size;
+
+ while (boundary * 2 <= 0x7fffffffUL - buffer_size)
+ boundary *= 2;
+ return boundary;
+}
+
+static struct avail_test_data p_avail_data[] = {
+ /* buf_size + hw_ptr < appl_ptr => avail = buf_size + hw_ptr - appl_ptr + boundary */
+ { 128, 1000, 1129, 1073741824UL - 1 },
+ /*
+ * buf_size + hw_ptr - appl_ptr >= boundary =>
+ * => avail = buf_size + hw_ptr - appl_ptr - boundary
+ */
+ { 128, 1073741824UL, 10, 118 },
+ /* standard case: avail = buf_size + hw_ptr - appl_ptr */
+ { 128, 1000, 1001, 127 },
+};
+
+static void test_playback_avail(struct kunit *test)
+{
+ struct snd_pcm_runtime *r = kunit_kzalloc(test, sizeof(*r), GFP_KERNEL);
+ u32 i;
+
+ r->status = kunit_kzalloc(test, sizeof(*r->status), GFP_KERNEL);
+ r->control = kunit_kzalloc(test, sizeof(*r->control), GFP_KERNEL);
+
+ for (i = 0; i < ARRAY_SIZE(p_avail_data); i++) {
+ r->buffer_size = p_avail_data[i].buffer_size;
+ r->boundary = calculate_boundary(r->buffer_size);
+ r->status->hw_ptr = p_avail_data[i].hw_ptr;
+ r->control->appl_ptr = p_avail_data[i].appl_ptr;
+ KUNIT_EXPECT_EQ(test, snd_pcm_playback_avail(r), p_avail_data[i].expected_avail);
+ }
+}
+
+static struct avail_test_data c_avail_data[] = {
+ /* hw_ptr - appl_ptr < 0 => avail = hw_ptr - appl_ptr + boundary */
+ { 128, 1000, 1001, 1073741824UL - 1 },
+ /* standard case: avail = hw_ptr - appl_ptr */
+ { 128, 1001, 1000, 1 },
+};
+
+static void test_capture_avail(struct kunit *test)
+{
+ struct snd_pcm_runtime *r = kunit_kzalloc(test, sizeof(*r), GFP_KERNEL);
+ u32 i;
+
+ r->status = kunit_kzalloc(test, sizeof(*r->status), GFP_KERNEL);
+ r->control = kunit_kzalloc(test, sizeof(*r->control), GFP_KERNEL);
+
+ for (i = 0; i < ARRAY_SIZE(c_avail_data); i++) {
+ r->buffer_size = c_avail_data[i].buffer_size;
+ r->boundary = calculate_boundary(r->buffer_size);
+ r->status->hw_ptr = c_avail_data[i].hw_ptr;
+ r->control->appl_ptr = c_avail_data[i].appl_ptr;
+ KUNIT_EXPECT_EQ(test, snd_pcm_capture_avail(r), c_avail_data[i].expected_avail);
+ }
+}
+
+static void test_card_set_id(struct kunit *test)
+{
+ struct snd_card *card = kunit_kzalloc(test, sizeof(*card), GFP_KERNEL);
+
+ snd_card_set_id(card, VALID_NAME);
+ KUNIT_EXPECT_STREQ(test, card->id, VALID_NAME);
+
+ /* clear the first id character so we can set it again */
+ card->id[0] = '\0';
+ snd_card_set_id(card, NAME_W_SPEC_CHARS);
+ KUNIT_EXPECT_STRNEQ(test, card->id, NAME_W_SPEC_CHARS);
+
+ card->id[0] = '\0';
+ snd_card_set_id(card, NAME_W_SPACE);
+ kunit_info(test, "%s", card->id);
+ KUNIT_EXPECT_STREQ(test, card->id, NAME_W_SPACE_REMOVED);
+}
+
+static void test_pcm_format_name(struct kunit *test)
+{
+ u32 i;
+ const char *name;
+
+ for (i = 0; i < ARRAY_SIZE(valid_fmt); i++) {
+ name = snd_pcm_format_name(valid_fmt[i].format);
+ KUNIT_ASSERT_NOT_NULL_MSG(test, name, "Don't have name for %s", valid_fmt[i].name);
+ KUNIT_EXPECT_STREQ(test, name, valid_fmt[i].name);
+ }
+
+ KUNIT_ASSERT_STREQ(test, snd_pcm_format_name(WRONG_FORMAT), "Unknown");
+ KUNIT_ASSERT_STREQ(test, snd_pcm_format_name(-1), "Unknown");
+}
+
+static void test_card_add_component(struct kunit *test)
+{
+ struct snd_card *card = kunit_kzalloc(test, sizeof(*card), GFP_KERNEL);
+
+ snd_component_add(card, TEST_FIRST_COMPONENT);
+ KUNIT_ASSERT_STREQ(test, card->components, TEST_FIRST_COMPONENT);
+
+ snd_component_add(card, TEST_SECOND_COMPONENT);
+ KUNIT_ASSERT_STREQ(test, card->components, TEST_FIRST_COMPONENT " " TEST_SECOND_COMPONENT);
+}
+
+static struct kunit_case sound_utils_cases[] = {
+ KUNIT_CASE(test_phys_format_size),
+ KUNIT_CASE(test_format_width),
+ KUNIT_CASE(test_format_endianness),
+ KUNIT_CASE(test_format_signed),
+ KUNIT_CASE(test_format_fill_silence),
+ KUNIT_CASE(test_playback_avail),
+ KUNIT_CASE(test_capture_avail),
+ KUNIT_CASE(test_card_set_id),
+ KUNIT_CASE(test_pcm_format_name),
+ KUNIT_CASE(test_card_add_component),
+ {},
+};
+
+static struct kunit_suite sound_utils_suite = {
+ .name = "sound-core-test",
+ .test_cases = sound_utils_cases,
+};
+
+kunit_test_suite(sound_utils_suite);
+MODULE_AUTHOR("Ivan Orlov");
+MODULE_LICENSE("GPL");
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