drivers: mipi_dsi: Add dummy driver for vnd,mipi-dsi

Add dummy driver for "vnd,mipi-dsi" to use in build_all tests.

Signed-off-by: TOKITA Hiroshi <tokita.hiroshi@gmail.com>

drivers/mipi_dsi/CMakeLists.txt

@@ -2,3 +2,4 @@ zephyr_sources_ifdef(CONFIG_MIPI_DSI mipi_dsi.c)
 zephyr_sources_ifdef(CONFIG_MIPI_DSI_MCUX dsi_mcux.c)
 zephyr_sources_ifdef(CONFIG_MIPI_DSI_MCUX_2L dsi_mcux_2l.c)
 zephyr_sources_ifdef(CONFIG_MIPI_DSI_STM32 dsi_stm32.c)
+zephyr_sources_ifdef(CONFIG_MIPI_DSI_TEST dsi_test.c)

drivers/mipi_dsi/Kconfig

@@ -23,5 +23,6 @@ config MIPI_DSI_INIT_PRIORITY
 
 source "drivers/mipi_dsi/Kconfig.mcux"
 source "drivers/mipi_dsi/Kconfig.stm32"
+source "drivers/mipi_dsi/Kconfig.test"
 
 endif

drivers/mipi_dsi/Kconfig.test

@@ -0,0 +1,6 @@
+# Copyright (c) 2024 TOKITA Hiroshi
+# SPDX-License-Identifier: Apache-2.0
+
+config MIPI_DSI_TEST
+	def_bool DT_HAS_VND_MIPI_DSI_ENABLED
+	depends on DT_HAS_VND_MIPI_DSI_ENABLED

drivers/mipi_dsi/dsi_test.c

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2024 TOKITA Hiroshi
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/*
+ * This is not a real mipi-dsi driver. It is used to instantiate struct
+ * devices for the "vnd,mipi-dsi" devicetree compatible used in test code.
+ */
+
+#include <zephyr/drivers/mipi_dsi.h>
+
+#define DT_DRV_COMPAT vnd_mipi_dsi
+
+static int vnd_mipi_dsi_attach(const struct device *dev, uint8_t channel,
+			       const struct mipi_dsi_device *mdev)
+{
+	ARG_UNUSED(dev);
+	ARG_UNUSED(channel);
+	ARG_UNUSED(mdev);
+
+	return -ENOTSUP;
+}
+
+static ssize_t vnd_mipi_dsi_transfer(const struct device *dev, uint8_t channel,
+				     struct mipi_dsi_msg *msg)
+{
+	ARG_UNUSED(dev);
+	ARG_UNUSED(channel);
+	ARG_UNUSED(msg);
+
+	return -1;
+}
+
+static int vnd_mipi_dsi_detach(const struct device *dev, uint8_t channel,
+			       const struct mipi_dsi_device *mdev)
+{
+	ARG_UNUSED(dev);
+	ARG_UNUSED(channel);
+	ARG_UNUSED(mdev);
+
+	return -ENOTSUP;
+}
+
+static struct mipi_dsi_driver_api vnd_mipi_dsi_api = {
+	.attach = vnd_mipi_dsi_attach,
+	.transfer = vnd_mipi_dsi_transfer,
+	.detach = vnd_mipi_dsi_detach,
+};
+
+#define VND_MIPI_DSI_INIT(n)                                                                       \
+	DEVICE_DT_INST_DEFINE(n, NULL, NULL, NULL, NULL, POST_KERNEL,                              \
+			      CONFIG_MIPI_DSI_INIT_PRIORITY, &vnd_mipi_dsi_api);
+
+DT_INST_FOREACH_STATUS_OKAY(VND_MIPI_DSI_INIT)

dts/bindings/test/vnd,mipi-dsi.yaml

@@ -0,0 +1,11 @@
+#
+# Copyright (c) 2024 TOKITA Hiroshi
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+description: Test MIPI DSI host
+
+compatible: "vnd,mipi-dsi"
+
+include: [mipi-dsi-host.yaml]