libcamera: camera_sensor: Apply flips at setFormat()

Augment the CameraSensor::setFormat() function to configure horizontal
and vertical flips before applying the image format on the sensor.

Applying flips before format is crucial as they might change the Bayer
pattern ordering.

To allow users of the CameraSensor class to specify a Transform,
add to the V4L2SubdeviceFormat class a 'transform' member, by
default initialized to Transform::Identity.

Moving the handling of H/V flips to the CameraSensor class allows to
remove quite some boilerplate code from the IPU3 and RaspberryPi
pipeline handlers.

No functional changes intended.

Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: David Plowman <david.plowman@raspberrypi.com>

1 files changed, 2 insertions, 26 deletions

diff --git a/src/libcamera/pipeline/ipu3/ipu3.cpp b/src/libcamera/pipeline/ipu3/ipu3.cpp
index a424ac91..3a569c7e 100644
--- a/src/libcamera/pipeline/ipu3/ipu3.cpp
+++ b/src/libcamera/pipeline/ipu3/ipu3.cpp
@@ -51,7 +51,7 @@ class IPU3CameraData : public Camera::Private
 {
 public:
 	IPU3CameraData(PipelineHandler *pipe)
-		: Camera::Private(pipe), supportsFlips_(false)
+		: Camera::Private(pipe)
 	{
 	}
 
@@ -73,7 +73,6 @@ public:
 	Stream rawStream_;
 
 	Rectangle cropRegion_;
-	bool supportsFlips_;
 	Transform rotationTransform_;
 
 	std::unique_ptr<DelayedControls> delayedCtrls_;
@@ -539,7 +538,7 @@ int PipelineHandlerIPU3::configure(Camera *camera, CameraConfiguration *c)
 	 */
 	const Size &sensorSize = config->cio2Format().size;
 	V4L2DeviceFormat cio2Format;
-	ret = cio2->configure(sensorSize, &cio2Format);
+	ret = cio2->configure(sensorSize, config->combinedTransform_, &cio2Format);
 	if (ret)
 		return ret;
 
@@ -548,24 +547,6 @@ int PipelineHandlerIPU3::configure(Camera *camera, CameraConfiguration *c)
 	data->cropRegion_ = sensorInfo.analogCrop;
 
 	/*
-	 * Configure the H/V flip controls based on the combination of
-	 * the sensor and user transform.
-	 */
-	if (data->supportsFlips_) {
-		ControlList sensorCtrls(cio2->sensor()->controls());
-		sensorCtrls.set(V4L2_CID_HFLIP,
-				static_cast<int32_t>(!!(config->combinedTransform_
-							& Transform::HFlip)));
-		sensorCtrls.set(V4L2_CID_VFLIP,
-				static_cast<int32_t>(!!(config->combinedTransform_
-						        & Transform::VFlip)));
-
-		ret = cio2->sensor()->setControls(&sensorCtrls);
-		if (ret)
-			return ret;
-	}
-
-	/*
 	 * If the ImgU gets configured, its driver seems to expect that
 	 * buffers will be queued to its outputs, as otherwise the next
 	 * capture session that uses the ImgU fails when queueing
@@ -1127,11 +1108,6 @@ int PipelineHandlerIPU3::registerCameras()
 			LOG(IPU3, Warning) << "Invalid rotation of " << rotationValue
 					   << " degrees: ignoring";
 
-		ControlList ctrls = cio2->sensor()->getControls({ V4L2_CID_HFLIP });
-		if (!ctrls.empty())
-			/* We assume the sensor supports VFLIP too. */
-			data->supportsFlips_ = true;
-
 		/**
 		 * \todo Dynamically assign ImgU and output devices to each
 		 * stream and camera; as of now, limit support to two cameras