tests: Add MIPI API tests

Unit tests to test the MIPI API

Signed-off-by: Mahesh Mahadevan <mahesh.mahadevan@nxp.com>

boards/arm/mimxrt1170_evk/mimxrt1170_evk_cm7.yaml

@@ -27,3 +27,4 @@ supported:
   - hwinfo
   - watchdog
   - netif:eth
+  - mipi_dsi

tests/drivers/mipi_dsi/api/CMakeLists.txt

@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(integration)
+
+FILE(GLOB app_sources src/*.c)
+target_sources(app PRIVATE ${app_sources})

tests/drivers/mipi_dsi/api/Kconfig

@@ -0,0 +1,15 @@
+#
+# Copyright 2022, NXP
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+mainmenu "mipi-dsi API Test"
+
+source "Kconfig.zephyr"
+
+config MIPI_DSI_TEST_CHANNEL
+	int "MIPI-DSI device channel number"
+	default 0
+	help
+	  MIPI device channel number used for testing.

tests/drivers/mipi_dsi/api/prj.conf

@@ -0,0 +1,3 @@
+CONFIG_DISPLAY=y
+CONFIG_TEST_USERSPACE=y
+CONFIG_ZTEST=y

tests/drivers/mipi_dsi/api/src/main.c

@@ -0,0 +1,87 @@
+/*
+ * Copyright 2022, NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/drivers/mipi_dsi.h>
+#include <ztest.h>
+
+/**
+ * @addtogroup t_mipi_dsi_driver
+ * @{
+ * @defgroup t_mipi_dsi_api test_mipi_dsi_api
+ * @}
+ */
+
+static const struct device *mipi_dev = DEVICE_DT_GET(DT_ALIAS(mipi_dsi));
+
+/**
+ * Test the MIPI generic APIs to test read and write API functionality
+ */
+static void test_generic(void)
+{
+	uint8_t rx_buf[2];
+	uint8_t param[2];
+	ssize_t ret;
+
+	param[0] = MIPI_DCS_SET_DISPLAY_ON;
+	ret = mipi_dsi_generic_write(mipi_dev, CONFIG_MIPI_DSI_TEST_CHANNEL, param, 1);
+	zassert(ret >= 0, "Failed to write", NULL);
+
+	param[0] = MIPI_DCS_SET_DISPLAY_BRIGHTNESS;
+	param[1] = 200;
+	ret = mipi_dsi_generic_write(mipi_dev, CONFIG_MIPI_DSI_TEST_CHANNEL, param, 2);
+	zassert(ret >= 0, "Failed to write", NULL);
+
+	memset(rx_buf, 0, sizeof(rx_buf));
+
+	param[0] = MIPI_DCS_GET_DISPLAY_BRIGHTNESS;
+	ret = mipi_dsi_generic_read(mipi_dev, CONFIG_MIPI_DSI_TEST_CHANNEL, param, 1, rx_buf, 2);
+
+	if (ret != -ENOTSUP) {
+		zassert(ret >= 0, "Failed to do a generic read", NULL);
+	}
+
+}
+
+/**
+ * Test the MIPI DCS APIs to test read and write API functionality
+ */
+static void test_dcs(void)
+{
+	uint8_t rx_buf[2];
+	uint8_t param[2];
+	ssize_t ret;
+
+	ret = mipi_dsi_dcs_write(mipi_dev, CONFIG_MIPI_DSI_TEST_CHANNEL,
+				 MIPI_DCS_SET_DISPLAY_ON, NULL, 0);
+	zassert(ret >= 0, "Failed to write", NULL);
+
+	param[0] = 200;
+	ret = mipi_dsi_dcs_write(mipi_dev, CONFIG_MIPI_DSI_TEST_CHANNEL,
+				 MIPI_DCS_SET_DISPLAY_BRIGHTNESS, param, 1);
+	zassert(ret >= 0, "Failed to write", NULL);
+
+	memset(rx_buf, 0, sizeof(rx_buf));
+
+	param[0] = MIPI_DCS_GET_DISPLAY_BRIGHTNESS;
+	ret = mipi_dsi_dcs_read(mipi_dev, CONFIG_MIPI_DSI_TEST_CHANNEL,
+				MIPI_DCS_GET_DISPLAY_BRIGHTNESS, rx_buf, 2);
+
+	if (ret != -ENOTSUP) {
+		zassert(ret >= 0, "Failed to do a dcs read", NULL);
+	}
+}
+
+void test_main(void)
+{
+	__ASSERT_NO_MSG(device_is_ready(mipi_dev));
+
+	ztest_test_suite(mipi_dsi_api_tests,
+			ztest_unit_test(test_generic),
+			ztest_unit_test(test_dcs)
+			);
+
+	ztest_run_test_suite(mipi_dsi_api_tests);
+}

tests/drivers/mipi_dsi/api/testcase.yaml

@@ -0,0 +1,5 @@
+tests:
+  drivers.mipi_dsi.api:
+    tags: drivers mipi_dsi
+    depends_on: mipi_dsi
+    filter: dt_alias_exists("mipi-dsi")