From 4b2251509f1543d018fea577e7e2760bb913ee86 Mon Sep 17 00:00:00 2001
From: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
Date: Thu, 24 Feb 2022 15:39:50 +0100
Subject: ipa: rkisp1: Introduce AWB

The RkISP1 ISP calculates a mean value for Y, Cr and Cb at each frame.
There is a RGB mode which could theoretically give us the values for R,
G and B directly, but it seems to be failing right now.

Convert those values into R, G and B and estimate the gain to apply in a
grey world.

Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
Tested-by: Peter Griffin <peter.griffin@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 src/ipa/rkisp1/ipa_context.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'src/ipa/rkisp1/ipa_context.h')

diff --git a/src/ipa/rkisp1/ipa_context.h b/src/ipa/rkisp1/ipa_context.h
index 35e9b8e5..f387cace 100644
--- a/src/ipa/rkisp1/ipa_context.h
+++ b/src/ipa/rkisp1/ipa_context.h
@@ -12,6 +12,8 @@
 
 #include <libcamera/base/utils.h>
 
+#include <libcamera/geometry.h>
+
 namespace libcamera {
 
 namespace ipa::rkisp1 {
@@ -25,6 +27,10 @@ struct IPASessionConfiguration {
 		struct rkisp1_cif_isp_window measureWindow;
 	} agc;
 
+	struct {
+		struct rkisp1_cif_isp_window measureWindow;
+	} awb;
+
 	struct {
 		utils::Duration lineDuration;
 	} sensor;
@@ -40,6 +46,16 @@ struct IPAFrameContext {
 		double gain;
 	} agc;
 
+	struct {
+		struct {
+			double red;
+			double green;
+			double blue;
+		} gains;
+
+		double temperatureK;
+	} awb;
+
 	struct {
 		uint32_t exposure;
 		double gain;
-- 
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