[libcamera-devel] [PATCH] ipa: ipu3: Correct context during configure()

[Kieran Bingham]

The introduction of the FCQueue in the IPU3 inadvertently introduced a
bug which cleared the initialisation of the session configuration
immediately after some parameters had been set.

Furthermore, it cleared and never re-initialised the sensor line
duration property, which was previously only set during the call to
init().

Move the clearing of the contexts from the updateSessionConfiguration()
call to the earliest opportunity in configure(), and immediately
re-initialise the sensor parameters.

Bug: https://bugs.libcamera.org/show_bug.cgi?id=151
Fixes: 85c5c47325ab ("ipa: ipu3: Use the FCQueue")
Signed-off-by: Kieran Bingham <kieran.bingham at ideasonboard.com>
---
 src/ipa/ipu3/ipu3.cpp | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/ipa/ipu3/ipu3.cpp b/src/ipa/ipu3/ipu3.cpp
index d1ea081d595d..7fb62c749fde 100644
--- a/src/ipa/ipu3/ipu3.cpp
+++ b/src/ipa/ipu3/ipu3.cpp
@@ -217,11 +217,6 @@ void IPAIPU3::updateSessionConfiguration(const ControlInfoMap &sensorControls)
 	int32_t minGain = v4l2Gain.min().get<int32_t>();
 	int32_t maxGain = v4l2Gain.max().get<int32_t>();
 
-	/* Clear the IPA context before the streaming session. */
-	context_.configuration = {};
-	context_.activeState = {};
-	context_.frameContexts.clear();
-
 	/*
 	 * When the AGC computes the new exposure values for a frame, it needs
 	 * to know the limits for shutter speed and analogue gain.
@@ -498,6 +493,14 @@ int IPAIPU3::configure(const IPAConfigInfo &configInfo,
 
 	lensCtrls_ = configInfo.lensControls;
 
+	/* Clear the IPA context for the new streaming session. */
+	context_.activeState = {};
+	context_.configuration = {};
+	context_.frameContexts.clear();
+
+	/* Intialise the sensor configuration */
+	context_.configuration.sensor.lineDuration = sensorInfo_.lineLength * 1.0s / sensorInfo_.pixelRate;
+
 	/*
 	 * Compute the sensor V4L2 controls to be used by the algorithms and
 	 * to be set on the sensor.
-- 
2.34.1