ipa: vimc: Map and unmap buffers

VIMC pipeline handler has dmabuf-backed mock FrameBuffers which are
specifically targetted mimicking IPA buffers (parameter and statistics).
Map these mock buffers to the VIMC IPA that would enable exercising IPA
IPC code paths. This will provide leverage to our test suite to test
IPA IPC code paths, which are common to various platforms.

Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/src/libcamera/pipeline/vimc/vimc.cpp b/src/libcamera/pipeline/vimc/vimc.cpp
index 90e0d558..e434cfbe 100644
--- a/src/libcamera/pipeline/vimc/vimc.cpp
+++ b/src/libcamera/pipeline/vimc/vimc.cpp
@@ -334,6 +334,14 @@ int PipelineHandlerVimc::start(Camera *camera, [[maybe_unused]] const ControlLis
 	if (ret < 0)
 		return ret;
 
+	/* Map the mock IPA buffers to VIMC IPA to exercise IPC code paths. */
+	std::vector<IPABuffer> ipaBuffers;
+	for (auto [i, buffer] : utils::enumerate(data->mockIPABufs_)) {
+		buffer->setCookie(i + 1);
+		ipaBuffers.emplace_back(buffer->cookie(), buffer->planes());
+	}
+	data->ipa_->mapBuffers(ipaBuffers);
+
 	ret = data->ipa_->start();
 	if (ret) {
 		data->video_->releaseBuffers();
@@ -354,7 +362,13 @@ void PipelineHandlerVimc::stop(Camera *camera)
 {
 	VimcCameraData *data = cameraData(camera);
 	data->video_->streamOff();
+
+	std::vector<unsigned int> ids;
+	for (const std::unique_ptr<FrameBuffer> &buffer : data->mockIPABufs_)
+		ids.push_back(buffer->cookie());
+	data->ipa_->unmapBuffers(ids);
 	data->ipa_->stop();
+
 	data->video_->releaseBuffers();
 }