[PATCH v2 4/9] libipa: agc_mean_luminance: Add debug logging

[Stefan Klug]

When debugging the AEGC it is important to know when the constraints
apply. As this is important information for anyone doing tuning file
optimization, add it upstream.

Signed-off-by: Stefan Klug <stefan.klug at ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham at ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally at ideasonboard.com>

---

Changes in v2:
- Collected tags
---
 src/ipa/libipa/agc_mean_luminance.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/ipa/libipa/agc_mean_luminance.cpp b/src/ipa/libipa/agc_mean_luminance.cpp
index f617fde81101..9154f083a510 100644
--- a/src/ipa/libipa/agc_mean_luminance.cpp
+++ b/src/ipa/libipa/agc_mean_luminance.cpp
@@ -468,12 +468,16 @@ double AgcMeanLuminance::constraintClampGain(uint32_t constraintModeIndex,
 				 hist.interQuantileMean(constraint.qLo, constraint.qHi);
 
 		if (constraint.bound == AgcConstraint::Bound::Lower &&
-		    newGain > gain)
+		    newGain > gain) {
 			gain = newGain;
+			LOG(AgcMeanLuminance, Debug) << "Apply lower bound: " << gain << " to " << newGain;
+		}
 
 		if (constraint.bound == AgcConstraint::Bound::Upper &&
-		    newGain < gain)
+		    newGain < gain) {
 			gain = newGain;
+			LOG(AgcMeanLuminance, Debug) << "Apply upper bound: " << gain << " to " << newGain;
+		}
 	}
 
 	return gain;
-- 
2.43.0