ipa: ipu3, mali-c55, rkisp1, rpi: Fix reporting non-scalar controls

The ControlInfos of non-scalar controls that are reported in controls()
must have non-scalar default values for controls that have a defined
size. This is because applications should be able to directly set the
default value from a ControlInfo to the control.

Currently this is relevant to the following controls:
- ColourGains
- ColourCorrectionMatrix
- FrameDurationLimits
- AfWindows

Fix the scalarness of these controls where relevant.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Tested-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com> # rkisp1
Reviewed-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/ipa/ipu3/ipu3.cpp

@@ -20,6 +20,7 @@
 
 #include <libcamera/base/file.h>
 #include <libcamera/base/log.h>
+#include <libcamera/base/span.h>
 #include <libcamera/base/utils.h>
 
 #include <libcamera/control_ids.h>
@@ -280,10 +281,9 @@ void IPAIPU3::updateControls(const IPACameraSensorInfo &sensorInfo,
 		uint64_t frameSize = lineLength * frameHeights[i];
 		frameDurations[i] = frameSize / (sensorInfo.pixelRate / 1000000U);
 	}
-
 	controls[&controls::FrameDurationLimits] = ControlInfo(frameDurations[0],
 							       frameDurations[1],
-							       frameDurations[2]);
+							       Span<const int64_t, 2>{ { frameDurations[2], frameDurations[2] } });
 
 	controls.merge(context_.ctrlMap);
 	*ipaControls = ControlInfoMap(std::move(controls), controls::controls);

src/ipa/mali-c55/mali-c55.cpp

@@ -5,6 +5,7 @@
  * Mali-C55 ISP image processing algorithms
  */
 
+#include <array>
 #include <map>
 #include <string.h>
 #include <vector>
@@ -14,6 +15,7 @@
 
 #include <libcamera/base/file.h>
 #include <libcamera/base/log.h>
+#include <libcamera/base/span.h>
 
 #include <libcamera/control_ids.h>
 #include <libcamera/ipa/ipa_interface.h>
@@ -236,7 +238,7 @@ void IPAMaliC55::updateControls(const IPACameraSensorInfo &sensorInfo,
 
 	ctrlMap[&controls::FrameDurationLimits] = ControlInfo(frameDurations[0],
 							      frameDurations[1],
-							      frameDurations[2]);
+							      Span<const int64_t, 2>{ { frameDurations[2], frameDurations[2] } });
 
 	/*
 	 * Compute exposure time limits from the V4L2_CID_EXPOSURE control

src/ipa/rkisp1/algorithms/awb.cpp

@@ -91,7 +91,9 @@ int Awb::init(IPAContext &context, const YamlObject &tuningData)
 							 kMaxColourTemperature,
 							 kDefaultColourTemperature);
 	cmap[&controls::AwbEnable] = ControlInfo(false, true);
-	cmap[&controls::ColourGains] = ControlInfo(0.0f, 3.996f, 1.0f);
+
+	cmap[&controls::ColourGains] = ControlInfo(0.0f, 3.996f,
+						   Span<const float, 2>{ { 1.0f, 1.0f } });
 
 	if (!tuningData.contains("algorithm"))
 		LOG(RkISP1Awb, Info) << "No AWB algorithm specified."

src/ipa/rkisp1/rkisp1.cpp

@@ -439,7 +439,8 @@ void IPARkISP1::updateControls(const IPACameraSensorInfo &sensorInfo,
 
 	/* \todo Move this (and other agc-related controls) to agc */
 	context_.ctrlMap[&controls::FrameDurationLimits] =
-		ControlInfo(frameDurations[0], frameDurations[1], frameDurations[2]);
+		ControlInfo(frameDurations[0], frameDurations[1],
+			    ControlValue(Span<const int64_t, 2>{ { frameDurations[2], frameDurations[2] } }));
 
 	ctrlMap.insert(context_.ctrlMap.begin(), context_.ctrlMap.end());
 	*ipaControls = ControlInfoMap(std::move(ctrlMap), controls::controls);

src/ipa/rpi/common/ipa_base.cpp

@@ -7,6 +7,7 @@
 
 #include "ipa_base.h"
 
+#include <array>
 #include <cmath>
 
 #include <libcamera/base/log.h>
@@ -105,7 +106,8 @@ const ControlInfoMap::Map ipaAfControls{
 	{ &controls::AfRange, ControlInfo(controls::AfRangeValues) },
 	{ &controls::AfSpeed, ControlInfo(controls::AfSpeedValues) },
 	{ &controls::AfMetering, ControlInfo(controls::AfMeteringValues) },
-	{ &controls::AfWindows, ControlInfo(Rectangle{}, Rectangle(65535, 65535, 65535, 65535), Rectangle{}) },
+	{ &controls::AfWindows, ControlInfo(Rectangle{}, Rectangle(65535, 65535, 65535, 65535),
+					    Span<const Rectangle, 1>{ { Rectangle{} } }) },
 	{ &controls::AfTrigger, ControlInfo(controls::AfTriggerValues) },
 	{ &controls::AfPause, ControlInfo(controls::AfPauseValues) },
 	{ &controls::LensPosition, ControlInfo(0.0f, 32.0f, 1.0f) }
@@ -246,7 +248,8 @@ int32_t IpaBase::configure(const IPACameraSensorInfo &sensorInfo, const ConfigPa
 	ctrlMap[&controls::FrameDurationLimits] =
 		ControlInfo(static_cast<int64_t>(mode_.minFrameDuration.get<std::micro>()),
 			    static_cast<int64_t>(mode_.maxFrameDuration.get<std::micro>()),
-			    static_cast<int64_t>(defaultMinFrameDuration.get<std::micro>()));
+			    Span<const int64_t, 2>{ { static_cast<int64_t>(defaultMinFrameDuration.get<std::micro>()),
+						      static_cast<int64_t>(defaultMinFrameDuration.get<std::micro>()) } });
 
 	ctrlMap[&controls::AnalogueGain] =
 		ControlInfo(static_cast<float>(mode_.minAnalogueGain),