[PATCH] ipa: rkisp1: Allow exposure time to be shorter than minimum frame duration limit

[Stefan Klug]

The minimum FrameDurationLimit also limits the min exposure time and
results in overly bright AE regulation. Remove the limit on the minimum
exposure time as the vertical blanking ensures the minimum frame
duration limit.

Fixes: f72c76eb6e06 ("rkisp1: Honor the FrameDurationLimits control")
Signed-off-by: Stefan Klug <stefan.klug at ideasonboard.com>
---
 src/ipa/rkisp1/algorithms/agc.cpp | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/src/ipa/rkisp1/algorithms/agc.cpp b/src/ipa/rkisp1/algorithms/agc.cpp
index 4e0e3734117e..5a3ba0131cf1 100644
--- a/src/ipa/rkisp1/algorithms/agc.cpp
+++ b/src/ipa/rkisp1/algorithms/agc.cpp
@@ -526,9 +526,7 @@ void Agc::process(IPAContext &context, [[maybe_unused]] const uint32_t frame,
 	double maxAnalogueGain;
 
 	if (frameContext.agc.autoExposureEnabled) {
-		minExposureTime = std::clamp(frameContext.agc.minFrameDuration,
-					     context.configuration.sensor.minExposureTime,
-					     context.configuration.sensor.maxExposureTime);
+		minExposureTime = context.configuration.sensor.minExposureTime;
 		maxExposureTime = std::clamp(frameContext.agc.maxFrameDuration,
 					     context.configuration.sensor.minExposureTime,
 					     context.configuration.sensor.maxExposureTime);
-- 
2.43.0