libcamera: ipu3: cio2: Make the V4L2 devices private

In order to make the CIO2 easier to extend with new features make the
V4L2 devices (sensor, CIO2 and video device) private members. This
requires a few helper functions to be added to allow for the IPU3 driver
to still be able to interact with all parts of the CIO2. These helper
functions will later be extended to add new features to the IPU3
pipeline.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 14 insertions, 3 deletions

diff --git a/src/libcamera/pipeline/ipu3/cio2.h b/src/libcamera/pipeline/ipu3/cio2.h
index 58254332..8cb90c9d 100644
--- a/src/libcamera/pipeline/ipu3/cio2.h
+++ b/src/libcamera/pipeline/ipu3/cio2.h
@@ -11,6 +11,8 @@
 #include <queue>
 #include <vector>
 
+#include <libcamera/signal.h>
+
 namespace libcamera {
 
 class CameraSensor;
@@ -36,6 +38,8 @@ public:
 	StreamConfiguration generateConfiguration(Size size) const;
 
 	int allocateBuffers();
+	int exportBuffers(unsigned int count,
+			  std::vector<std::unique_ptr<FrameBuffer>> *buffers);
 	void freeBuffers();
 
 	FrameBuffer *getBuffer();
@@ -44,11 +48,18 @@ public:
 	int start();
 	int stop();
 
-	V4L2VideoDevice *output_;
-	V4L2Subdevice *csi2_;
-	CameraSensor *sensor_;
+	CameraSensor *sensor() { return sensor_; }
+
+	int queueBuffer(FrameBuffer *buffer);
+	Signal<FrameBuffer *> bufferReady;
 
 private:
+	void cio2BufferReady(FrameBuffer *buffer);
+
+	CameraSensor *sensor_;
+	V4L2Subdevice *csi2_;
+	V4L2VideoDevice *output_;
+
 	std::vector<std::unique_ptr<FrameBuffer>> buffers_;
 	std::queue<FrameBuffer *> availableBuffers_;
 };