ASoC: soc-utils-test: Add test for snd_soc_params_to_bclk()

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@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220817125508.1406651-1-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/soc-utils-test.c b/sound/soc/soc-utils-test.c
index 5ad8e23af49ade31bd2f9a9541117e0c483062e8..616d2c926dd181f10733ce5e274953e45761fe4c 100644 (file)
--- 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),
        {}
 };