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>

1 files changed, 5 insertions, 0 deletions

diff --git a/sound/soc/Makefile b/sound/soc/Makefile
index a7b37c06dc43..d4528962ac34 100644
--- a/sound/soc/Makefile
+++ b/sound/soc/Makefile
@@ -12,6 +12,11 @@ ifneq ($(CONFIG_SND_SOC_TOPOLOGY_KUNIT_TEST),)
 obj-$(CONFIG_SND_SOC_TOPOLOGY_KUNIT_TEST) := soc-topology-test.o
 endif
 
+ifneq ($(CONFIG_SND_SOC_UTILS_KUNIT_TEST),)
+# snd-soc-test-objs := soc-utils-test.o
+obj-$(CONFIG_SND_SOC_UTILS_KUNIT_TEST) := soc-utils-test.o
+endif
+
 ifneq ($(CONFIG_SND_SOC_GENERIC_DMAENGINE_PCM),)
 snd-soc-core-objs += soc-generic-dmaengine-pcm.o
 endif