From patchwork Mon Aug 10 10:38:39 2026 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Barnab=C3=A1s_P=C5=91cze?= X-Patchwork-Id: 27717 Return-Path: X-Original-To: parsemail@patchwork.libcamera.org Delivered-To: parsemail@patchwork.libcamera.org Received: from lancelot.ideasonboard.com (lancelot.ideasonboard.com [92.243.16.209]) by patchwork.libcamera.org (Postfix) with ESMTPS id 55316BDE4C for ; Mon, 10 Aug 2026 10:40:01 +0000 (UTC) Received: from lancelot.ideasonboard.com (localhost [IPv6:::1]) by lancelot.ideasonboard.com (Postfix) with ESMTP id E11FC68246; Mon, 10 Aug 2026 12:40:00 +0200 (CEST) Authentication-Results: lancelot.ideasonboard.com; dkim=pass (1024-bit key; unprotected) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="U5sDJMpx"; dkim-atps=neutral Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by lancelot.ideasonboard.com (Postfix) with ESMTPS id 728F4681FB for ; Mon, 10 Aug 2026 12:39:00 +0200 (CEST) Received: from pb-laptop.local (185.221.141.208.nat.pool.zt.hu [185.221.141.208]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 7C22312B2; Mon, 10 Aug 2026 12:37:46 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1786358266; bh=o3ChTNTNhby4e+uaZHwCGEtk/KjtUf47VgQ3RkgGWkU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=U5sDJMpxSKPkzw7zaKUo53VzIiE+yS/SVexvFoHeOqXgorrk0h78/Mz0DasQ54NIC 8b2mQIEilAerEzAS8GTay1e8c+4dDLsvArwpIdW2X4Iv4+TzwHZjDUKMPzjmE4TJVK hxdZ0IrLMOsrCTYzf5nfxq4Em1Rlu7BqO/4aoH70= From: =?utf-8?q?Barnab=C3=A1s_P=C5=91cze?= To: libcamera-devel@lists.libcamera.org Cc: Milan Zamazal Subject: [PATCH v4 43/49] ipa: libipa: agc_msv: Handle min gain > 1.0 case Date: Mon, 10 Aug 2026 12:38:39 +0200 Message-ID: <20260810103846.1075936-44-barnabas.pocze@ideasonboard.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260810103846.1075936-1-barnabas.pocze@ideasonboard.com> References: <20260810103846.1075936-1-barnabas.pocze@ideasonboard.com> MIME-Version: 1.0 X-BeenThere: libcamera-devel@lists.libcamera.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libcamera-devel-bounces@lists.libcamera.org Sender: "libcamera-devel" When manual gain control is enabled in `AgcAlgorithm`, the limits will be set to that particular value. This is very likely larger than 1.0. In this case, however, the algorithm should still adjust the exposure time if it can. So compare the gain with the maximum of 1.0 and the configured min gain, in order to ensure that the exposure will be adjusted if the lower boundary of the allowed analogue gains is reached. Signed-off-by: Barnabás Pőcze Reviewed-by: Milan Zamazal --- src/ipa/libipa/agc_msv.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/ipa/libipa/agc_msv.cpp b/src/ipa/libipa/agc_msv.cpp index 956551685c..9fec2ba48a 100644 --- a/src/ipa/libipa/agc_msv.cpp +++ b/src/ipa/libipa/agc_msv.cpp @@ -206,7 +206,7 @@ AgcMSV::Result AgcMSV::updateExposure(uint32_t exposure, double again, float exp } } else { /* Scene too bright: decrease gain first, then exposure. */ - if (again > limits_.gain1) { + if (again > std::max(limits_.gain1, limits_.gain[0])) { double next = again * factor; again = std::min(next, again - limits_.gainMinStep); } else {