{"id":26163,"url":"https://patchwork.libcamera.org/api/covers/26163/?format=json","web_url":"https://patchwork.libcamera.org/cover/26163/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/projects/1/?format=json","name":"libcamera","link_name":"libcamera","list_id":"libcamera_core","list_email":"libcamera-devel@lists.libcamera.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260216190204.106922-1-johannes.goede@oss.qualcomm.com>","date":"2026-02-16T19:01:59","name":"[0/5] software_isp: debayer_cpu: Add multi-threading support","submitter":{"id":242,"url":"https://patchwork.libcamera.org/api/people/242/?format=json","name":"Hans de Goede","email":"johannes.goede@oss.qualcomm.com"},"mbox":"https://patchwork.libcamera.org/cover/26163/mbox/","series":[{"id":5794,"url":"https://patchwork.libcamera.org/api/series/5794/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=5794","date":"2026-02-16T19:01:59","name":"software_isp: debayer_cpu: Add multi-threading support","version":1,"mbox":"https://patchwork.libcamera.org/series/5794/mbox/"}],"comments":"https://patchwork.libcamera.org/api/covers/26163/comments/","headers":{"Return-Path":"<libcamera-devel-bounces@lists.libcamera.org>","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 4762EC0DA4\n\tfor <parsemail@patchwork.libcamera.org>;\n\tMon, 16 Feb 2026 19:02:12 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 4296E62203;\n\tMon, 16 Feb 2026 20:02:11 +0100 (CET)","from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com\n\t[205.220.168.131])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 5077362084\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tMon, 16 Feb 2026 20:02:09 +0100 (CET)","from pps.filterd (m0279865.ppops.net [127.0.0.1])\n\tby mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id\n\t61GBvjDJ2994176 for <libcamera-devel@lists.libcamera.org>;\n\tMon, 16 Feb 2026 19:02:07 GMT","from mail-vk1-f199.google.com (mail-vk1-f199.google.com\n\t[209.85.221.199])\n\tby mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4cbfuw340n-1\n\t(version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT)\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tMon, 16 Feb 2026 19:02:07 +0000 (GMT)","by mail-vk1-f199.google.com with SMTP id\n\t71dfb90a1353d-5665b2ca0ccso48417718e0c.0\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tMon, 16 Feb 2026 11:02:07 -0800 (PST)","from shalem\n\t(2001-1c00-0c32-7800-5bfa-a036-83f0-f9ec.cable.dynamic.v6.ziggo.nl.\n\t[2001:1c00:c32:7800:5bfa:a036:83f0:f9ec])\n\tby smtp.gmail.com with ESMTPSA id\n\ta640c23a62f3a-b8fc735e587sm276698966b.2.2026.02.16.11.02.04\n\t(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n\tMon, 16 Feb 2026 11:02:05 -0800 (PST)"],"Authentication-Results":"lancelot.ideasonboard.com; dkim=pass (2048-bit key;\n\tunprotected) header.d=qualcomm.com header.i=@qualcomm.com\n\theader.b=\"MC9wc7F8\"; dkim=pass (2048-bit key;\n\tunprotected) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com\n\theader.b=\"UOGwz++Z\"; dkim-atps=neutral","DKIM-Signature":["v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h=\n\tcc:content-transfer-encoding:date:from:message-id:mime-version\n\t:subject:to; s=qcppdkim1; bh=rMC7HeD+KLSTbIEvDY5l7nOtSeFMPhHeVFk\n\tdtU+blNY=; b=MC9wc7F8gF6JevdII4q//FMNBWRsR3te9alqa76+zxFGbrG5Jeb\n\trjIFzEHw+a+v6fOlbdEKFrzwyrVo+7EmaUMM67gUI9ZqigYs+pLKlTaRlQ/X6fmx\n\tf2/SPoPe+zJ76tEHHS6Do0Yz+TxD0OJgGuL/rTCiba8NjNGN/zLER0bWe85avXxU\n\txoodULbVgwTvEWmATAkXB8CRboXFRlX12/i2OSO/jGE2XbbYqH40MS5KM1ctyfmG\n\thLJmKbSRU5el/JIbvOD/p5asEIW6IzShoishwzHnIi11CWGl8vdh3UK4U+v6+HTL\n\tMEnzZfrkF5EnJp8i2mQ43ZVmAa2V1LpSmCA==","v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=oss.qualcomm.com; s=google; t=1771268526; x=1771873326;\n\tdarn=lists.libcamera.org; \n\th=content-transfer-encoding:mime-version:message-id:date:subject:cc\n\t:to:from:from:to:cc:subject:date:message-id:reply-to;\n\tbh=rMC7HeD+KLSTbIEvDY5l7nOtSeFMPhHeVFkdtU+blNY=;\n\tb=UOGwz++ZJBN22yYFT++NQB6W8lcsfRuJNzgFRvEqdrrnbJr1S8rF1Z/VUoSEuQqxlP\n\tUC8tlOPKwK6i+8UtV0HKdTqHveN3CeFp5oNhVVcU/VCCGA0kTihlVaPCUxys9vQUJ+PJ\n\t0XHDrwS4+bHeD/Do+U7bVwQ+ThIEodHQB30tgtiFA9msrXcpmKPPq4b/+GQVRVA7Lt9w\n\t1X6opRrfOnCT+lHPymvJe16Q6Sf9tliRFBvdg78hQmamj5lSP0MQSx7pmeWWeF0loH6o\n\tV3+IP5DCpXRnO6Q6Ukq3VP6B0Xd69FVBjNQtGyRMkl9pDQ9xTCoJtKvpi4RWf7BIwgYr\n\trkcw=="],"X-Google-DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=1e100.net; s=20230601; t=1771268526; x=1771873326;\n\th=content-transfer-encoding:mime-version:message-id:date:subject:cc\n\t:to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date\n\t:message-id:reply-to;\n\tbh=rMC7HeD+KLSTbIEvDY5l7nOtSeFMPhHeVFkdtU+blNY=;\n\tb=OT1I7yb4okGF4cBZdgKWxuFehh7XLEjSppDA3n2t5nw7jvFBHd8+gIXyzbdM1MegUC\n\tgKcET9ftma48DDRJ7gPpUN5Yvlr6GpI0bRFdn+teWiQB9L2kOPQgIw7FAkdKctJR5FfO\n\thZyRFZhJ5Y97+nNxOfCXZBk4ORui3oVbFOzHNqPaJyEe7GE6gVKb2wxFI8oAMpKF9LFx\n\t3C+L7OyFPi49lCaAIHmcHIBHQDd1E1hiD67agTKZDbqQBqA8WIl8YFePLEcyMSJt9v/s\n\twTiZizqErv9q9aS0pZtNiqvJx7AB1808VxXgm3nOKPXMh7TeO9wJElGkgppXjr9Okp5P\n\tP6oA==","X-Gm-Message-State":"AOJu0YwEaPzJeeh6HFonvA0hFEF1WBxHmxH+NL5JJ4al7eIvL+EC7g9O\n\t+sM/2Rqh2vNDr3XjqZMXZ6YG0/Uka/gRDum2WS67GkOjaGQqGbQmruYEWDhWllbuGf6seJefkiW\n\t7wD3QmNccnbay3qL8+TKiLy47OfZ7LfriuoZalwuBVWv1Fb0wQu+QoYRVTRAdQuTX9aebimrnwY\n\t8m63kZEHz+","X-Gm-Gg":"AZuq6aKAYnPy3jlg/D6QWRm1tmiaHXdms7UOQSS5X5g8c0CG2eQFMNBnC5JHeLeUOx+\n\tvK3Aw/FZcTJJeRjPBAhGWDs/7TMcYIizDriquW+aRbjT/3HzBSLDqlAGceQqX6ww6e1GVAgs4Jz\n\td6sBvqzphxuxLVUulXgZdmmh/UCuyXAXjD9uJVGUpdS/wxBL3YX9pbx2b8IDC2eJzhDyyNJzJo+\n\tJMeAQTYfmXGPNymwkga2uo1Bf1XQDc4K2qa9e6xzORA01hZxsAsq2uX+H4TwxdQrEOTnQNfkWqm\n\ttWqEvv4WZLIu255oKc3A+rc57OrSUoEbclGlt0bA4TFjTcMSv23zQI4kW9uHm0vvaadhgo2z1pB\n\tKsDCfg8c6xe7FhOyjKM1XZxCoC2LZuXRTShEMKJEJhmRCJ641/8N5dPR9eV57+zm533fdB2bb58\n\tSfpn6s7GVZcziD5IbAq/RfIJaNOObdy+T6Qs3r","X-Received":["by 2002:a05:6122:d19:b0:566:3d03:8e1d with SMTP id\n\t71dfb90a1353d-5676aa97c9bmr3551910e0c.17.1771268526103; \n\tMon, 16 Feb 2026 11:02:06 -0800 (PST)","by 2002:a05:6122:d19:b0:566:3d03:8e1d with SMTP id\n\t71dfb90a1353d-5676aa97c9bmr3551881e0c.17.1771268525743; \n\tMon, 16 Feb 2026 11:02:05 -0800 (PST)"],"From":"Hans de Goede <johannes.goede@oss.qualcomm.com>","To":"libcamera-devel@lists.libcamera.org, Milan Zamazal <mzamazal@redhat.com>","Cc":"Hans de Goede <johannes.goede@oss.qualcomm.com>","Subject":"[PATCH 0/5] software_isp: debayer_cpu: Add multi-threading support","Date":"Mon, 16 Feb 2026 20:01:59 +0100","Message-ID":"<20260216190204.106922-1-johannes.goede@oss.qualcomm.com>","X-Mailer":"git-send-email 2.52.0","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","X-Authority-Analysis":"v=2.4 cv=Jb+xbEKV c=1 sm=1 tr=0 ts=699369af cx=c_pps\n\ta=+D9SDfe9YZWTjADjLiQY5g==:117 a=xqWC_Br6kY4A:10 a=HzLeVaNsDn8A:10\n\ta=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=Mpw57Om8IfrbqaoTuvik:22\n\ta=GgsMoib0sEa3-_RKJdDe:22 a=FDNAttz-a9KG-frOgdAA:9\n\ta=vmgOmaN-Xu0dpDh8OwbV:22","X-Proofpoint-ORIG-GUID":"0OHY4BpwxmzP40eXrQBYd9k_eMyaqA87","X-Proofpoint-GUID":"0OHY4BpwxmzP40eXrQBYd9k_eMyaqA87","X-Proofpoint-Spam-Details-Enc":"AW1haW4tMjYwMjE2MDE2MyBTYWx0ZWRfX9cyIgafRSJZH\n\t1KF5NZGVm8/GvBjNiR/hTLBmQZEjDUQfJes/NQC35Jrx4AkvD/H7GFuuRbXxy64K7VfzjMQYtg5\n\tJgrIdOmRJ90YuZ/iqh0OEF8YG2qCuII8EXPLNKUeQ5JRmMBLOmVUJ5+8fG4fXMTuZX2p70jnpmt\n\tf4cnSdWrNWYuReh4N095DfEnHSWHrakpKXnDqQcFq3HsbbCTvaptG1LWHFQiBLO6eRDZ//zhlIU\n\tuzD14P8pTjwliOlHiwhibzwmwtBarXfzDgyA2hE+fyvRUMBer0R2i5ztA7mBavuSRSeiLvBOfIU\n\tZtlrlM/KlDURGjv8iJmkP8ZpWNjZm6c4DAzKFomV1vMoS4eJJSYaPNAjYrxZasJzditzWf1xSF0\n\tC1PT0M5kj7QGutJZnYp8zwRNuXzHFwdlOtkTSyKYkd7KisVTHzdnBGI+Q5AYs9SoAduEkfSgBfb\n\tOevHT+CZtxK/FLuOrrg==","X-Proofpoint-Virus-Version":"vendor=baseguard\n\tengine=ICAP:2.0.293, Aquarius:18.0.1121, Hydra:6.1.51,\n\tFMLib:17.12.100.49\n\tdefinitions=2026-02-16_06,2026-02-16_04,2025-10-01_01","X-Proofpoint-Spam-Details":"rule=outbound_notspam policy=outbound score=0\n\tbulkscore=0 impostorscore=0 adultscore=0 suspectscore=0 spamscore=0\n\tlowpriorityscore=0 priorityscore=1501 phishscore=0 clxscore=1015\n\tmalwarescore=0 classifier=typeunknown authscore=0 authtc= authcc=\n\troute=outbound adjust=0 reason=mlx scancount=1\n\tengine=8.22.0-2601150000\n\tdefinitions=main-2602160163","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"<libcamera-devel.lists.libcamera.org>","List-Unsubscribe":"<https://lists.libcamera.org/options/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=unsubscribe>","List-Archive":"<https://lists.libcamera.org/pipermail/libcamera-devel/>","List-Post":"<mailto:libcamera-devel@lists.libcamera.org>","List-Help":"<mailto:libcamera-devel-request@lists.libcamera.org?subject=help>","List-Subscribe":"<https://lists.libcamera.org/listinfo/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=subscribe>","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>"},"content":"Hi All,\n\nThe QCM2290 SoC used on the Arduino Uno-Q seems to have a very weak GPU(1),\nso weak that it is barely faster then a single CPU core.\n\nThis has made me code-up the long envisioned multi-threading support\nfor the CPU softISP :)\n\nBenchmark results for the Uno-Q + IMX219 running at 3280x2464 -> 3272x2464:\n\n1 thread :  147ms / frame, ~6.5  fps\n2 threads:   81ms / frame, ~12   fps\n3 threads:   66ms / frame, ~14.5 fps\nGPU:        130ms / frame, ~7,5  fps\nGPU 0-copy: 110ms / frame, ~9.5  fps (requires pipeline + camss hacks)\nGPU lite:    85ms / frame, ~12   fps (CCM, contrast and gamma disabled)\n\nRegards,\n\nHans\n\n1) If the GPU really is this weak needs to be investigated more\n\nHans de Goede (5):\n  software_isp: swstats_cpu: Move accumulator storage out of the class\n  software_isp: debayer_cpu: Add per render thread data\n  software_isp: debayer_cpu: Group innerloop variables together\n  software_isp: debayer_cpu: Select process inner loop by function\n    pointer\n  software_isp: debayer_cpu: Add multi-threading support\n\n .../internal/software_isp/swstats_cpu.h       |  29 ++--\n src/libcamera/software_isp/debayer_cpu.cpp    | 131 ++++++++++++------\n src/libcamera/software_isp/debayer_cpu.h      |  44 ++++--\n src/libcamera/software_isp/swstats_cpu.cpp    |  65 ++++++---\n 4 files changed, 180 insertions(+), 89 deletions(-)"}