[PATCH v2] ipa: rpi: awb: Disable CT search bias for Grey World AWB

[Naushir Patuck]

If grey world AWB is setup in the tuning file, the CT curve will either
be missing or invalid. Disable biasing the statistics for the search in
such cases.

Fixes: ea8fd63d936f ("ipa: rpi: awb: Add a bias to the AWB search")
Signed-off-by: Naushir Patuck <naush at raspberrypi.com>
Reviewed-by: David Plowman <david.plowman at raspberrypi.com>
Reviewed-by: Kieran Bingham <kieran.bingham at ideasonboard.com>
---
 src/ipa/rpi/controller/rpi/awb.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/ipa/rpi/controller/rpi/awb.cpp b/src/ipa/rpi/controller/rpi/awb.cpp
index 9d8e170d1bfe..c277a1764112 100644
--- a/src/ipa/rpi/controller/rpi/awb.cpp
+++ b/src/ipa/rpi/controller/rpi/awb.cpp
@@ -459,10 +459,11 @@ void Awb::prepareStats()
 	 * LSC has already been applied to the stats in this pipeline, so stop
 	 * any LSC compensation.  We also ignore config_.fast in this version.
 	 */
+	const double biasCtR = config_.bayes ? config_.ctR.eval(config_.biasCT) : 0;
+	const double biasCtB = config_.bayes ? config_.ctB.eval(config_.biasCT) : 0;
 	generateStats(zones_, statistics_, config_.minPixels,
 		      config_.minG, getGlobalMetadata(),
-		      config_.biasProportion, config_.ctR.eval(config_.biasCT),
-		      config_.ctB.eval(config_.biasCT));
+		      config_.biasProportion, biasCtR, biasCtB);
 	/*
 	 * apply sensitivities, so values appear to come from our "canonical"
 	 * sensor.
-- 
2.34.1