[v6,27/47] ipa: libipa: agc: Store digital gain
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Message ID 20260820151918.2382337-28-barnabas.pocze@ideasonboard.com
State New
Headers show
Series
  • ipa: libipa: agc rework
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Commit Message

Barnabás Pőcze Aug. 20, 2026, 3:18 p.m. UTC 
While digital gain support is not implemented yet, start by storing
the suggested digital gain in the active state.

Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
---
 src/ipa/libipa/agc.cpp | 7 ++++++-
 src/ipa/libipa/agc.h   | 1 +
 2 files changed, 7 insertions(+), 1 deletion(-)

Patch
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diff --git a/src/ipa/libipa/agc.cpp b/src/ipa/libipa/agc.cpp
index fb6f765029..61b93b9f08 100644
--- a/src/ipa/libipa/agc.cpp
+++ b/src/ipa/libipa/agc.cpp
@@ -129,6 +129,9 @@  namespace agc {
  * \var agc::ActiveState::automatic.quantizationGain
  * \brief Automatic quantization gain multiplier
  *
+ * \var agc::ActiveState::automatic.digitalGain
+ * \brief Automatic digital gain multiplier
+ *
  * \var agc::ActiveState::automatic.yTarget
  * \brief Automatically determined luminance target
  *
@@ -353,6 +356,7 @@  int AgcAlgorithm::configure(agc::Session &session, agc::ActiveState &state,
 	state.automatic.gain = session.minAnalogueGain;
 	state.automatic.exposure = defExposure;
 	state.automatic.quantizationGain = 1;
+	state.automatic.digitalGain = 1;
 	state.automatic.yTarget = impl_.effectiveYTarget(0, 1);
 	state.manual.gain = state.automatic.gain;
 	state.manual.exposure = state.automatic.exposure;
@@ -631,13 +635,14 @@  void AgcAlgorithm::process(const agc::Session &session, agc::ActiveState &state,
 	state.automatic.exposure = newEv.exposureTime / lineDuration;
 	state.automatic.gain = newEv.analogueGain;
 	state.automatic.quantizationGain = newEv.quantizationGain;
+	state.automatic.digitalGain = newEv.digitalGain;
 	state.automatic.yTarget = newEv.yTarget;
 
 	LOG(Agc, Debug)
 		<< "exposure-time: " << newEv.exposureTime << ", "
 		<< "analogue-gain: " << state.automatic.gain << ", "
 		<< "quantization-gain: " << state.automatic.quantizationGain << ", "
-		<< "digital-gain: " << newEv.digitalGain;
+		<< "digital-gain: " << state.automatic.digitalGain;
 
 	/*
 	 * Expand the target frame duration so that we do not run faster than
diff --git a/src/ipa/libipa/agc.h b/src/ipa/libipa/agc.h
index cd22be5389..60ca00caa2 100644
--- a/src/ipa/libipa/agc.h
+++ b/src/ipa/libipa/agc.h
@@ -53,6 +53,7 @@  struct ActiveState {
 		uint32_t exposure;
 		double gain;
 		double quantizationGain;
+		double digitalGain;
 		double yTarget;
 	} automatic;