[PATCH] ASoC: soc-utils-test: Add test for snd_soc_params_to_bclk()

From: Richard Fitzgerald
Date: Wed Aug 17 2022 - 08:55:33 EST


snd_soc_params_to_bclk() calculates the BCLK from only the information in
snd_pcm_hw_params. It is therefore a subset of the functionality of
snd_soc_tdm_params_to_bclk() so can use a subset of the test case table.

Signed-off-by: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx>
---
sound/soc/soc-utils-test.c | 46 ++++++++++++++++++++++++++++++++++++++
1 file changed, 46 insertions(+)

diff --git a/sound/soc/soc-utils-test.c b/sound/soc/soc-utils-test.c
index 5ad8e23af49a..616d2c926dd1 100644
--- a/sound/soc/soc-utils-test.c
+++ b/sound/soc/soc-utils-test.c
@@ -170,8 +170,54 @@ static void test_tdm_params_to_bclk(struct kunit *test)
}
}

+static void test_snd_soc_params_to_bclk_one(struct kunit *test,
+ unsigned int rate, snd_pcm_format_t fmt,
+ unsigned int channels,
+ 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_params_to_bclk(&params);
+ pr_debug("%s: r=%u sb=%u ch=%u expected=%u got=%d\n",
+ __func__,
+ rate, params_width(&params), channels, expected_bclk, got_bclk);
+ KUNIT_ASSERT_EQ(test, expected_bclk, (unsigned int)got_bclk);
+}
+
+static void test_snd_soc_params_to_bclk(struct kunit *test)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(tdm_params_to_bclk_cases); ++i) {
+ /*
+ * snd_soc_params_to_bclk() is all the test cases where
+ * snd_pcm_hw_params values are not overridden.
+ */
+ if (tdm_params_to_bclk_cases[i].tdm_width |
+ tdm_params_to_bclk_cases[i].tdm_slots |
+ tdm_params_to_bclk_cases[i].slot_multiple)
+ continue;
+
+ test_snd_soc_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].bclk);
+ }
+}
+
static struct kunit_case soc_utils_test_cases[] = {
KUNIT_CASE(test_tdm_params_to_bclk),
+ KUNIT_CASE(test_snd_soc_params_to_bclk),
{}
};

--
2.30.2