[PATCH] ipa: rpi: Fix for incorrectly reported max shutter speed

[Naushir Patuck]

The maximum shutter speed calculation in the cam-helper relied on
the frame duration limits being correctly set in the cam-helper's mode
structure. This was not the case on first startup, so the maximum
shutter speed reported back via the ControlInfo was incorrect.

Fix this by setting up the camera mode in the cam-helper before querying
for the max shutter value.

Signed-off-by: Naushir Patuck <naush at raspberrypi.com>
---
 src/ipa/rpi/common/ipa_base.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/ipa/rpi/common/ipa_base.cpp b/src/ipa/rpi/common/ipa_base.cpp
index 149a133ab662..1d12262bda01 100644
--- a/src/ipa/rpi/common/ipa_base.cpp
+++ b/src/ipa/rpi/common/ipa_base.cpp
@@ -592,6 +592,12 @@ void IpaBase::setMode(const IPACameraSensorInfo &sensorInfo)
 	mode_.minAnalogueGain = helper_->gain(gainCtrl.min().get<int32_t>());
 	mode_.maxAnalogueGain = helper_->gain(gainCtrl.max().get<int32_t>());
 
+	/*
+	 * We need to give the helper the min/max frame durations so it can calculate
+	 * the correct exposure limits below.
+	 */
+	helper_->setCameraMode(mode_);
+
 	/* Shutter speed is calculated based on the limits of the frame durations. */
 	mode_.minShutter = helper_->exposure(shutterCtrl.min().get<int32_t>(), mode_.minLineLength);
 	mode_.maxShutter = Duration::max();
-- 
2.34.1