libcamera: ipu3: Initialize controls in the IPA

All the IPU3 Camera controls are currently initialized by the pipeline
handler which initializes them using the camera sensor configuration and
platform specific requirements.

However, some controls are better initialized by the IPA, which might,
in example, cap the exposure times and frame duration to the constraints
of its algorithms implementation.

Also, moving forward, the IPA should register controls to report its
capabilities, in example the ability to enable/disable 3A algorithms on
request.

Move the existing controls initialization to the IPA, by providing
the sensor configuration and its controls to the IPU3IPA::init()
function, which initializes controls and returns them to the pipeline
through an output parameter.

The existing controls initialization has been copied verbatim from the
pipeline handler to the IPA, if not a for few line breaks adjustments
and the resulting Camera controls values are not changed.

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

1 files changed, 4 insertions, 1 deletions

diff --git a/include/libcamera/ipa/ipu3.mojom b/include/libcamera/ipa/ipu3.mojom
index 911a3a07..d561c224 100644
--- a/include/libcamera/ipa/ipu3.mojom
+++ b/include/libcamera/ipa/ipu3.mojom
@@ -38,7 +38,10 @@ struct IPAConfigInfo {
 };
 
 interface IPAIPU3Interface {
-	init(libcamera.IPASettings settings) => (int32 ret);
+	init(libcamera.IPASettings settings,
+	     libcamera.IPACameraSensorInfo sensorInfo,
+	     libcamera.ControlInfoMap sensorControls)
+		=> (int32 ret, libcamera.ControlInfoMap ipaControls);
 	start() => (int32 ret);
 	stop();