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linux/sound/soc/soc-utils-test.c
Richard Fitzgerald 89342fa38b
ASoC: soc-utils: Add kunit test for snd_soc_tdm_params_to_bclk() 
Create a new kunit test for soc-utils and use it to test
snd_soc_tdm_params_to_bclk().

The test uses a table of values to avoid the possibility that an
on-the-fly generator contains the same algorithmic error as the
function-under-test and so fails to detect a bug.

There is no need to test every possible combination of values.
Enough test cases are included to give confidence that the function
is producing the correct results.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220405135419.1230088-4-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2022-04-05 18:27:56 +01:00

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// SPDX-License-Identifier: GPL-2.0-only
// Copyright (C) 2022 Cirrus Logic, Inc. and
// Cirrus Logic International Semiconductor Ltd.
#include <kunit/test.h>
#include <linux/module.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <uapi/sound/asound.h>
static const struct {
u32 rate;
snd_pcm_format_t fmt;
u8 channels;
u8 tdm_width;
u8 tdm_slots;
u8 slot_multiple;
u32 bclk;
} tdm_params_to_bclk_cases[] = {
/* rate fmt channels tdm_width tdm_slots slot_multiple bclk */
/* From params only */
{ 8000, SNDRV_PCM_FORMAT_S16_LE, 1, 0, 0, 0, 128000 },
{ 8000, SNDRV_PCM_FORMAT_S16_LE, 2, 0, 0, 0, 256000 },
{ 8000, SNDRV_PCM_FORMAT_S24_LE, 1, 0, 0, 0, 192000 },
{ 8000, SNDRV_PCM_FORMAT_S24_LE, 2, 0, 0, 0, 384000 },
{ 8000, SNDRV_PCM_FORMAT_S32_LE, 1, 0, 0, 0, 256000 },
{ 8000, SNDRV_PCM_FORMAT_S32_LE, 2, 0, 0, 0, 512000 },
{ 44100, SNDRV_PCM_FORMAT_S16_LE, 1, 0, 0, 0, 705600 },
{ 44100, SNDRV_PCM_FORMAT_S16_LE, 2, 0, 0, 0, 1411200 },
{ 44100, SNDRV_PCM_FORMAT_S24_LE, 1, 0, 0, 0, 1058400 },
{ 44100, SNDRV_PCM_FORMAT_S24_LE, 2, 0, 0, 0, 2116800 },
{ 44100, SNDRV_PCM_FORMAT_S32_LE, 1, 0, 0, 0, 1411200 },
{ 44100, SNDRV_PCM_FORMAT_S32_LE, 2, 0, 0, 0, 2822400 },
{ 384000, SNDRV_PCM_FORMAT_S16_LE, 1, 0, 0, 0, 6144000 },
{ 384000, SNDRV_PCM_FORMAT_S16_LE, 2, 0, 0, 0, 12288000 },
{ 384000, SNDRV_PCM_FORMAT_S24_LE, 1, 0, 0, 0, 9216000 },
{ 384000, SNDRV_PCM_FORMAT_S24_LE, 2, 0, 0, 0, 18432000 },
{ 384000, SNDRV_PCM_FORMAT_S32_LE, 1, 0, 0, 0, 12288000 },
{ 384000, SNDRV_PCM_FORMAT_S32_LE, 2, 0, 0, 0, 24576000 },
/* I2S from params */
{ 8000, SNDRV_PCM_FORMAT_S16_LE, 1, 0, 0, 2, 256000 },
{ 8000, SNDRV_PCM_FORMAT_S16_LE, 2, 0, 0, 2, 256000 },
{ 8000, SNDRV_PCM_FORMAT_S24_LE, 1, 0, 0, 2, 384000 },
{ 8000, SNDRV_PCM_FORMAT_S24_LE, 2, 0, 0, 2, 384000 },
{ 8000, SNDRV_PCM_FORMAT_S32_LE, 1, 0, 0, 2, 512000 },
{ 8000, SNDRV_PCM_FORMAT_S32_LE, 2, 0, 0, 2, 512000 },
{ 44100, SNDRV_PCM_FORMAT_S16_LE, 1, 0, 0, 2, 1411200 },
{ 44100, SNDRV_PCM_FORMAT_S16_LE, 2, 0, 0, 2, 1411200 },
{ 44100, SNDRV_PCM_FORMAT_S24_LE, 1, 0, 0, 2, 2116800 },
{ 44100, SNDRV_PCM_FORMAT_S24_LE, 2, 0, 0, 2, 2116800 },
{ 44100, SNDRV_PCM_FORMAT_S32_LE, 1, 0, 0, 2, 2822400 },
{ 44100, SNDRV_PCM_FORMAT_S32_LE, 2, 0, 0, 2, 2822400 },
{ 384000, SNDRV_PCM_FORMAT_S16_LE, 1, 0, 0, 2, 12288000 },
{ 384000, SNDRV_PCM_FORMAT_S16_LE, 2, 0, 0, 2, 12288000 },
{ 384000, SNDRV_PCM_FORMAT_S24_LE, 1, 0, 0, 2, 18432000 },
{ 384000, SNDRV_PCM_FORMAT_S24_LE, 2, 0, 0, 2, 18432000 },
{ 384000, SNDRV_PCM_FORMAT_S32_LE, 1, 0, 0, 2, 24576000 },
{ 384000, SNDRV_PCM_FORMAT_S32_LE, 2, 0, 0, 2, 24576000 },
/* Fixed 8-slot TDM, other values from params */
{ 8000, SNDRV_PCM_FORMAT_S16_LE, 1, 0, 8, 0, 1024000 },
{ 8000, SNDRV_PCM_FORMAT_S16_LE, 2, 0, 8, 0, 1024000 },
{ 8000, SNDRV_PCM_FORMAT_S16_LE, 3, 0, 8, 0, 1024000 },
{ 8000, SNDRV_PCM_FORMAT_S16_LE, 4, 0, 8, 0, 1024000 },
{ 8000, SNDRV_PCM_FORMAT_S32_LE, 1, 0, 8, 0, 2048000 },
{ 8000, SNDRV_PCM_FORMAT_S32_LE, 2, 0, 8, 0, 2048000 },
{ 8000, SNDRV_PCM_FORMAT_S32_LE, 3, 0, 8, 0, 2048000 },
{ 8000, SNDRV_PCM_FORMAT_S32_LE, 4, 0, 8, 0, 2048000 },
{ 384000, SNDRV_PCM_FORMAT_S16_LE, 1, 0, 8, 0, 49152000 },
{ 384000, SNDRV_PCM_FORMAT_S16_LE, 2, 0, 8, 0, 49152000 },
{ 384000, SNDRV_PCM_FORMAT_S16_LE, 3, 0, 8, 0, 49152000 },
{ 384000, SNDRV_PCM_FORMAT_S16_LE, 4, 0, 8, 0, 49152000 },
{ 384000, SNDRV_PCM_FORMAT_S32_LE, 1, 0, 8, 0, 98304000 },
{ 384000, SNDRV_PCM_FORMAT_S32_LE, 2, 0, 8, 0, 98304000 },
{ 384000, SNDRV_PCM_FORMAT_S32_LE, 3, 0, 8, 0, 98304000 },
{ 384000, SNDRV_PCM_FORMAT_S32_LE, 4, 0, 8, 0, 98304000 },
/* Fixed 32-bit TDM, other values from params */
{ 8000, SNDRV_PCM_FORMAT_S16_LE, 1, 32, 0, 0, 256000 },
{ 8000, SNDRV_PCM_FORMAT_S16_LE, 2, 32, 0, 0, 512000 },
{ 8000, SNDRV_PCM_FORMAT_S16_LE, 3, 32, 0, 0, 768000 },
{ 8000, SNDRV_PCM_FORMAT_S16_LE, 4, 32, 0, 0, 1024000 },
{ 8000, SNDRV_PCM_FORMAT_S32_LE, 1, 32, 0, 0, 256000 },
{ 8000, SNDRV_PCM_FORMAT_S32_LE, 2, 32, 0, 0, 512000 },
{ 8000, SNDRV_PCM_FORMAT_S32_LE, 3, 32, 0, 0, 768000 },
{ 8000, SNDRV_PCM_FORMAT_S32_LE, 4, 32, 0, 0, 1024000 },
{ 384000, SNDRV_PCM_FORMAT_S16_LE, 1, 32, 0, 0, 12288000 },
{ 384000, SNDRV_PCM_FORMAT_S16_LE, 2, 32, 0, 0, 24576000 },
{ 384000, SNDRV_PCM_FORMAT_S16_LE, 3, 32, 0, 0, 36864000 },
{ 384000, SNDRV_PCM_FORMAT_S16_LE, 4, 32, 0, 0, 49152000 },
{ 384000, SNDRV_PCM_FORMAT_S32_LE, 1, 32, 0, 0, 12288000 },
{ 384000, SNDRV_PCM_FORMAT_S32_LE, 2, 32, 0, 0, 24576000 },
{ 384000, SNDRV_PCM_FORMAT_S32_LE, 3, 32, 0, 0, 36864000 },
{ 384000, SNDRV_PCM_FORMAT_S32_LE, 4, 32, 0, 0, 49152000 },
/* Fixed 6-slot 24-bit TDM, other values from params */
{ 8000, SNDRV_PCM_FORMAT_S16_LE, 1, 24, 6, 0, 1152000 },
{ 8000, SNDRV_PCM_FORMAT_S16_LE, 2, 24, 6, 0, 1152000 },
{ 8000, SNDRV_PCM_FORMAT_S16_LE, 3, 24, 6, 0, 1152000 },
{ 8000, SNDRV_PCM_FORMAT_S16_LE, 4, 24, 6, 0, 1152000 },
{ 8000, SNDRV_PCM_FORMAT_S24_LE, 1, 24, 6, 0, 1152000 },
{ 8000, SNDRV_PCM_FORMAT_S24_LE, 2, 24, 6, 0, 1152000 },
{ 8000, SNDRV_PCM_FORMAT_S24_LE, 3, 24, 6, 0, 1152000 },
{ 8000, SNDRV_PCM_FORMAT_S24_LE, 4, 24, 6, 0, 1152000 },
{ 192000, SNDRV_PCM_FORMAT_S16_LE, 1, 24, 6, 0, 27648000 },
{ 192000, SNDRV_PCM_FORMAT_S16_LE, 2, 24, 6, 0, 27648000 },
{ 192000, SNDRV_PCM_FORMAT_S16_LE, 3, 24, 6, 0, 27648000 },
{ 192000, SNDRV_PCM_FORMAT_S16_LE, 4, 24, 6, 0, 27648000 },
{ 192000, SNDRV_PCM_FORMAT_S24_LE, 1, 24, 6, 0, 27648000 },
{ 192000, SNDRV_PCM_FORMAT_S24_LE, 2, 24, 6, 0, 27648000 },
{ 192000, SNDRV_PCM_FORMAT_S24_LE, 3, 24, 6, 0, 27648000 },
{ 192000, SNDRV_PCM_FORMAT_S24_LE, 4, 24, 6, 0, 27648000 },
};
static void test_tdm_params_to_bclk_one(struct kunit *test,
unsigned int rate, snd_pcm_format_t fmt,
unsigned int channels,
unsigned int tdm_width, unsigned int tdm_slots,
unsigned int slot_multiple,
unsigned int expected_bclk)
{
struct snd_pcm_hw_params params;
int got_bclk;
_snd_pcm_hw_params_any(&params);
snd_mask_none(hw_param_mask(&params, SNDRV_PCM_HW_PARAM_FORMAT));
hw_param_interval(&params, SNDRV_PCM_HW_PARAM_RATE)->min = rate;
hw_param_interval(&params, SNDRV_PCM_HW_PARAM_RATE)->max = rate;
hw_param_interval(&params, SNDRV_PCM_HW_PARAM_CHANNELS)->min = channels;
hw_param_interval(&params, SNDRV_PCM_HW_PARAM_CHANNELS)->max = channels;
params_set_format(&params, fmt);
got_bclk = snd_soc_tdm_params_to_bclk(&params, tdm_width, tdm_slots, slot_multiple);
pr_debug("%s: r=%u sb=%u ch=%u tw=%u ts=%u sm=%u expected=%u got=%d\n",
__func__,
rate, params_width(&params), channels, tdm_width, tdm_slots, slot_multiple,
expected_bclk, got_bclk);
KUNIT_ASSERT_EQ(test, expected_bclk, (unsigned int)got_bclk);
}
static void test_tdm_params_to_bclk(struct kunit *test)
{
int i;
for (i = 0; i < ARRAY_SIZE(tdm_params_to_bclk_cases); ++i) {
test_tdm_params_to_bclk_one(test,
tdm_params_to_bclk_cases[i].rate,
tdm_params_to_bclk_cases[i].fmt,
tdm_params_to_bclk_cases[i].channels,
tdm_params_to_bclk_cases[i].tdm_width,
tdm_params_to_bclk_cases[i].tdm_slots,
tdm_params_to_bclk_cases[i].slot_multiple,
tdm_params_to_bclk_cases[i].bclk);
if (tdm_params_to_bclk_cases[i].slot_multiple > 0)
continue;
/* Slot multiple 1 should have the same effect as multiple 0 */
test_tdm_params_to_bclk_one(test,
tdm_params_to_bclk_cases[i].rate,
tdm_params_to_bclk_cases[i].fmt,
tdm_params_to_bclk_cases[i].channels,
tdm_params_to_bclk_cases[i].tdm_width,
tdm_params_to_bclk_cases[i].tdm_slots,
1,
tdm_params_to_bclk_cases[i].bclk);
}
}
static struct kunit_case soc_utils_test_cases[] = {
KUNIT_CASE(test_tdm_params_to_bclk),
{}
};
static struct kunit_suite soc_utils_test_suite = {
.name = "soc-utils",
.test_cases = soc_utils_test_cases,
};
kunit_test_suites(&soc_utils_test_suite);
MODULE_DESCRIPTION("ASoC soc-utils kunit test");
MODULE_LICENSE("GPL");
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