[nrf fromlist] tests: drivers: i2s: Add test for 8ch, 32bit, 48k TDM

Add test case where TDM is thested with 8 channels,
32 bit workd size, 48k sample rate.

Upstream PR #: 95249

Signed-off-by: Sebastian Głąb <[email protected]>

Author: nordic-segl

tests/drivers/i2s/i2s_additional/boards/nrf54h20dk_nrf54h20_cpuapp_aclk.overlay

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&audiopll {
+	status = "okay";
+	frequency = <NRFS_AUDIOPLL_FREQ_AUDIO_48K>;
+};
+
+&tdm130 {
+	mck-frequency = <12288000>;
+	mck-clock-source = "ACLK";
+	sck-clock-source = "ACLK";
+};

tests/drivers/i2s/i2s_additional/src/main.c

@@ -519,7 +519,7 @@ ZTEST(i2s_additional, test_02b_four_channels)
 #endif /* CONFIG_I2S_TEST_FOUR_CHANNELS_UNSUPPORTED */
 }
 
-/** @brief Test I2S transfer with eight channels.
+/** @brief Test I2S transfer with eight channels, 16 bit and 44.1 kHz.
  */
 ZTEST(i2s_additional, test_02c_eight_channels)
 {
@@ -549,6 +549,38 @@ ZTEST(i2s_additional, test_02c_eight_channels)
 #endif /* CONFIG_I2S_TEST_EIGHT_CHANNELS_UNSUPPORTED */
 }
 
+/** @brief Test I2S transfer with eight channels, 32 bit and 48 kHz.
+ */
+ZTEST(i2s_additional, test_02d_eight_channels)
+{
+	struct i2s_config i2s_cfg = default_i2s_cfg;
+
+	i2s_cfg.channels = 8;
+	i2s_cfg.word_size = 32;
+	i2s_cfg.frame_clk_freq = 48000;
+
+#if defined(CONFIG_I2S_TEST_EIGHT_CHANNELS_UNSUPPORTED)
+	int ret;
+
+	ret = i2s_configure(dev_i2s, I2S_DIR_TX, &i2s_cfg);
+	zassert_equal(ret, -EINVAL, "Unexpected result %d", ret);
+#else /* CONFIG_I2S_TEST_EIGHT_CHANNELS_UNSUPPORTED */
+
+	/* Select format that supports eight channels. */
+#if !defined(CONFIG_I2S_TEST_DATA_FORMAT_PCM_LONG_UNSUPPORTED)
+	i2s_cfg.format = I2S_FMT_DATA_FORMAT_PCM_LONG;
+	TC_PRINT("Selected format is I2S_FMT_DATA_FORMAT_PCM_LONG\n");
+#elif !defined(CONFIG_I2S_TEST_DATA_FORMAT_PCM_SHORT_UNSUPPORTED)
+	i2s_cfg.format = I2S_FMT_DATA_FORMAT_PCM_SHORT;
+	TC_PRINT("Selected format is I2S_FMT_DATA_FORMAT_PCM_SHORT\n");
+#else
+#error "Don't know what format supports eight channels."
+#endif
+
+	i2s_dir_both_transfer_long(&i2s_cfg);
+#endif /* CONFIG_I2S_TEST_EIGHT_CHANNELS_UNSUPPORTED */
+}
+
 /** @brief Test I2S transfer with format I2S_FMT_DATA_FORMAT_I2S
  */
 ZTEST(i2s_additional, test_03a_format_i2s)

tests/drivers/i2s/i2s_additional/testcase.yaml

@@ -31,6 +31,15 @@ tests:
     integration_platforms:
       - nrf54h20dk/nrf54h20/cpuapp
 
+  drivers.i2s.additional.gpio_loopback.54h.aclk:
+    harness_config:
+      fixture: i2s_loopback
+    extra_args: EXTRA_DTC_OVERLAY_FILE="boards/nrf54h20dk_nrf54h20_cpuapp_aclk.overlay"
+    platform_allow:
+      - nrf54h20dk/nrf54h20/cpuapp
+    integration_platforms:
+      - nrf54h20dk/nrf54h20/cpuapp
+
   drivers.i2s.additional.gpio_loopback.aclk:
     harness_config:
       fixture: gpio_loopback