test: pipeline: IPU3: Add IPU3 pipeline test

Add test for the Intel IPU3 pipeline that lists all the cameras
registered in the system and verifies the result matches the expected.

This test is meant to be run on IPU3 platforms, it gets skipped
otherwise.

Acked-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>

test/meson.build

@@ -1,6 +1,7 @@
 subdir('libtest')
 
 subdir('media_device')
+subdir('pipeline')
 subdir('v4l2_device')
 
 public_tests = [

test/pipeline/ipu3/ipu3_pipeline_test.cpp

@@ -0,0 +1,130 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * ipu3_pipeline_test.cpp - Intel IPU3 pipeline test
+ */
+
+#include <iostream>
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <libcamera/camera.h>
+#include <libcamera/camera_manager.h>
+
+#include "device_enumerator.h"
+#include "media_device.h"
+#include "media_object.h"
+#include "test.h"
+
+using namespace std;
+using namespace libcamera;
+
+/*
+ * Verify that the Intel IPU3 pipeline handler gets matched and cameras
+ * are enumerated correctly.
+ *
+ * The test is supposed to be run on an IPU3 platform, otherwise it gets
+ * skipped.
+ *
+ * The test lists all cameras registered in the system, if any camera is
+ * available at all.
+ */
+class IPU3PipelineTest : public Test
+{
+protected:
+	int init();
+	int run();
+	void cleanup();
+
+private:
+	CameraManager *cameraManager_;
+	unsigned int sensors_;
+};
+
+int IPU3PipelineTest::init()
+{
+	unique_ptr<DeviceEnumerator> enumerator = DeviceEnumerator::create();
+	if (!enumerator) {
+		cerr << "Failed to create device enumerator" << endl;
+		return TestFail;
+	}
+
+	if (enumerator->enumerate()) {
+		cerr << "Failed to enumerate media devices" << endl;
+		return TestFail;
+	}
+
+	DeviceMatch imgu_dm("ipu3-imgu");
+	DeviceMatch cio2_dm("ipu3-cio2");
+
+	if (!enumerator->search(imgu_dm)) {
+		cerr << "Failed to find IPU3 IMGU: test skip" << endl;
+		return TestSkip;
+	}
+
+	MediaDevice *cio2 = enumerator->search(cio2_dm);
+	if (!cio2) {
+		cerr << "Failed to find IPU3 CIO2: test skip" << endl;
+		return TestSkip;
+	}
+
+	if (cio2->open()) {
+		cerr << "Failed to open media device " << cio2->devnode() << endl;
+		return TestFail;
+	}
+
+	/*
+	 * Camera sensor are connected to the CIO2 unit.
+	 * Count how many sensors are connected in the system
+	 * and later verify this matches the number of registered
+	 * cameras.
+	 */
+	int ret = cio2->populate();
+	if (ret) {
+		cerr << "Failed to populate media device " << cio2->devnode() << endl;
+		return TestFail;
+	}
+
+	sensors_ = 0;
+	const vector<MediaEntity *> &entities = cio2->entities();
+	for (MediaEntity *entity : entities) {
+		if (entity->function() == MEDIA_ENT_F_CAM_SENSOR)
+			sensors_++;
+	}
+
+	enumerator.reset(nullptr);
+
+	cameraManager_ = CameraManager::instance();
+	ret = cameraManager_->start();
+	if (ret) {
+		cerr << "Failed to start the CameraManager" << endl;
+		return TestFail;
+	}
+
+	return 0;
+}
+
+int IPU3PipelineTest::run()
+{
+	auto cameras = cameraManager_->cameras();
+	for (const std::shared_ptr<Camera> &cam : cameras)
+		cout << "Found camera '" << cam->name() << "'" << endl;
+
+	if (cameras.size() != sensors_) {
+		cerr << cameras.size() << " cameras registered, but " << sensors_
+		     << " were expected" << endl;
+		return TestFail;
+	}
+
+	return TestPass;
+}
+
+void IPU3PipelineTest::cleanup()
+{
+	cameraManager_->stop();
+}
+
+TEST_REGISTER(IPU3PipelineTest)

test/pipeline/ipu3/meson.build

@@ -0,0 +1,11 @@
+ipu3_test = [
+    ['ipu3_pipeline_test',	      'ipu3_pipeline_test.cpp'],
+]
+
+foreach t : ipu3_test
+    exe = executable(t[0], t[1],
+                     link_with : test_libraries,
+                     include_directories : test_includes_internal)
+
+    test(t[0], exe, suite: 'ipu3', is_parallel: false)
+endforeach

test/pipeline/meson.build

@@ -0,0 +1 @@
+subdir('ipu3')