From fbea6a4c023cd0757c0a7e812763c1193916fc61 Mon Sep 17 00:00:00 2001
From: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Date: Fri, 15 Nov 2024 12:25:37 +0000
Subject: ipa: mali-c55: Add BLC Algorithm

Add a Black Level Correction algorithm.

Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Acked-by: Nayden Kanchev  <nayden.kanchev@arm.com>
Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Daniel Scally <dan.scally@ideasonboard.com>
---
 src/ipa/mali-c55/mali-c55.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'src/ipa/mali-c55/mali-c55.cpp')

diff --git a/src/ipa/mali-c55/mali-c55.cpp b/src/ipa/mali-c55/mali-c55.cpp
index e332c7a7..c6941a95 100644
--- a/src/ipa/mali-c55/mali-c55.cpp
+++ b/src/ipa/mali-c55/mali-c55.cpp
@@ -193,6 +193,16 @@ void IPAMaliC55::updateSessionConfiguration(const IPACameraSensorInfo &info,
 	context_.configuration.agc.defaultExposure = defExposure;
 	context_.configuration.agc.minAnalogueGain = camHelper_->gain(minGain);
 	context_.configuration.agc.maxAnalogueGain = camHelper_->gain(maxGain);
+
+	if (camHelper_->blackLevel().has_value()) {
+		/*
+		 * The black level from CameraSensorHelper is a 16-bit value.
+		 * The Mali-C55 ISP expects 20-bit settings, so we shift it to
+		 * the appropriate width
+		 */
+		context_.configuration.sensor.blackLevel =
+			camHelper_->blackLevel().value() << 4;
+	}
 }
 
 void IPAMaliC55::updateControls(const IPACameraSensorInfo &sensorInfo,
-- 
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