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{ "id": 23319, "url": "https://patchwork.libcamera.org/api/patches/23319/?format=api", "web_url": "https://patchwork.libcamera.org/patch/23319/", "project": { "id": 1, "url": "https://patchwork.libcamera.org/api/projects/1/?format=api", "name": "libcamera", "link_name": "libcamera", "list_id": "libcamera_core", "list_email": "libcamera-devel@lists.libcamera.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20250430121449.39910-13-mzamazal@redhat.com>", "date": "2025-04-30T12:14:45", "name": "[v8,12/15] libcamera: software_isp: Make input buffer copying configurable", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "8993953aad0c3f004375ce3f7d911eb8d6befc60", "submitter": { "id": 177, "url": "https://patchwork.libcamera.org/api/people/177/?format=api", "name": "Milan Zamazal", "email": "mzamazal@redhat.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/23319/mbox/", "series": [ { "id": 5156, "url": "https://patchwork.libcamera.org/api/series/5156/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=5156", "date": "2025-04-30T12:14:33", "name": "Add global configuration file", "version": 8, "mbox": "https://patchwork.libcamera.org/series/5156/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/23319/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/23319/checks/", "tags": {}, "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 E1AE2BE08B\n\tfor <parsemail@patchwork.libcamera.org>;\n\tWed, 30 Apr 2025 12:15:34 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 9694668B3E;\n\tWed, 30 Apr 2025 14:15:34 +0200 (CEST)", "from us-smtp-delivery-124.mimecast.com\n\t(us-smtp-delivery-124.mimecast.com [170.10.129.124])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 6CA6F68B3C\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tWed, 30 Apr 2025 14:15:30 +0200 (CEST)", "from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com\n\t(ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97])\n\tby relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3,\n\tcipher=TLS_AES_256_GCM_SHA384) id us-mta-617-9eZ0B1EiPZCuHE6NkzJiDw-1;\n\tWed, 30 Apr 2025 08:15:26 -0400", "from mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com\n\t(mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com\n\t[10.30.177.111])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\tkey-exchange X25519 server-signature RSA-PSS (2048 bits)\n\tserver-digest SHA256) (No client certificate requested)\n\tby mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix)\n\twith ESMTPS id 0A0E11800873; Wed, 30 Apr 2025 12:15:25 +0000 (UTC)", "from mzamazal-thinkpadp1gen7.tpbc.com (unknown [10.44.32.120])\n\tby mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix)\n\twith ESMTP id 4850E180047F; Wed, 30 Apr 2025 12:15:23 +0000 (UTC)" ], "Authentication-Results": "lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=redhat.com header.i=@redhat.com\n\theader.b=\"Txj1IZJN\"; dkim-atps=neutral", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;\n\ts=mimecast20190719; t=1746015329;\n\th=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n\tto:to:cc:cc:mime-version:mime-version:content-type:content-type:\n\tcontent-transfer-encoding:content-transfer-encoding:\n\tin-reply-to:in-reply-to:references:references;\n\tbh=xuUa1oqsfSt8W+p75/DmvlqSj23hOoo6x+Y+y8IATyU=;\n\tb=Txj1IZJNMrI5ofQZ+4iL8OBhSY0ROxya9Qh1dNKxYtRSjpB1IbcvhccPUkt97v8PAKDle7\n\td+0mdyuTR6AHm3gr35Rcmc+4dDrMWXvpmWXY+/rqPFAEAterMM+xe7clrDvUh+d2nj6u4Q\n\tnHAO9y3KOqz5WUvOS+NAIMQzr4qmKUE=", "X-MC-Unique": "9eZ0B1EiPZCuHE6NkzJiDw-1", "X-Mimecast-MFC-AGG-ID": "9eZ0B1EiPZCuHE6NkzJiDw_1746015325", "From": "Milan Zamazal <mzamazal@redhat.com>", "To": "libcamera-devel@lists.libcamera.org", "Cc": "Milan Zamazal <mzamazal@redhat.com>, Kieran Bingham\n\t<kieran.bingham@ideasonboard.com>, =?utf-8?q?Barnab=C3=A1s_P=C5=91cze?=\n\t<pobrn@protonmail.com>, Laurent Pinchart\n\t<laurent.pinchart@ideasonboard.com>", "Subject": "[PATCH v8 12/15] libcamera: software_isp: Make input buffer copying\n\tconfigurable", "Date": "Wed, 30 Apr 2025 14:14:45 +0200", "Message-ID": "<20250430121449.39910-13-mzamazal@redhat.com>", "In-Reply-To": "<20250430121449.39910-1-mzamazal@redhat.com>", "References": "<20250430121449.39910-1-mzamazal@redhat.com>", "MIME-Version": "1.0", "X-Scanned-By": "MIMEDefang 3.4.1 on 10.30.177.111", "X-Mimecast-Spam-Score": "0", "X-Mimecast-MFC-PROC-ID": "x9jlZHsqo8vjbkGdHZuMdkRY3XyXo1h-LMQQV8RjiHw_1746015325", "X-Mimecast-Originator": "redhat.com", "Content-Transfer-Encoding": "8bit", "content-type": "text/plain; charset=\"US-ASCII\"; x-default=true", "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": "On some platforms, working directly on the input buffer is very slow due\nto disabled caching. This is why we copy the input buffer into standard\n(cached) memory. This is an unnecessary overhead on platforms with\ncached buffers.\n\nLet's make input buffer copying configurable. The default is still\ncopying, as it's overhead is much lower than contingent operations on\nnon-cached memory. Ideally, we should improve this in future to set the\ndefault to non-copying if we can be sure under observable circumstances\nthat we are working with cached buffers.\n\nCompletes software ISP TODO #6.\n\nSigned-off-by: Milan Zamazal <mzamazal@redhat.com>\n---\n Documentation/runtime_configuration.rst | 2 ++\n src/libcamera/software_isp/TODO | 11 -----------\n src/libcamera/software_isp/debayer_cpu.cpp | 5 ++++-\n 3 files changed, 6 insertions(+), 12 deletions(-)", "diff": "diff --git a/Documentation/runtime_configuration.rst b/Documentation/runtime_configuration.rst\nindex a3812d44..d439fa21 100644\n--- a/Documentation/runtime_configuration.rst\n+++ b/Documentation/runtime_configuration.rst\n@@ -53,6 +53,7 @@ file structure:\n rpi:\n config_file: # full path\n simple:\n+ copy_input_buffer: # true/false\n supported_devices:\n - driver: # driver name, e.g. `mxc-isi`\n software_isp: # true/false\n@@ -88,6 +89,7 @@ Configuration file example\n rpi:\n config_file: /usr/local/share/libcamera/pipeline/rpi/vc4/minimal_mem.yaml\n simple:\n+ copy_input_buffer: false\n supported_devices:\n - driver: mxc-isi\n software_isp: true\ndiff --git a/src/libcamera/software_isp/TODO b/src/libcamera/software_isp/TODO\nindex a50db668..2c919f44 100644\n--- a/src/libcamera/software_isp/TODO\n+++ b/src/libcamera/software_isp/TODO\n@@ -71,17 +71,6 @@ per-frame buffers like we do for hardware ISPs.\n \n ---\n \n-6. Input buffer copying configuration\n-\n-> DebayerCpu::DebayerCpu(std::unique_ptr<SwStatsCpu> stats)\n-> \t: stats_(std::move(stats)), gammaCorrection_(1.0)\n-> {\n-> \tenableInputMemcpy_ = true;\n-\n-Set this appropriately and/or make it configurable.\n-\n----\n-\n 7. Performance measurement configuration\n \n > void DebayerCpu::process(FrameBuffer *input, FrameBuffer *output, DebayerParams params)\ndiff --git a/src/libcamera/software_isp/debayer_cpu.cpp b/src/libcamera/software_isp/debayer_cpu.cpp\nindex 66f6038c..2c8faa22 100644\n--- a/src/libcamera/software_isp/debayer_cpu.cpp\n+++ b/src/libcamera/software_isp/debayer_cpu.cpp\n@@ -24,6 +24,7 @@\n #include \"libcamera/internal/bayer_format.h\"\n #include \"libcamera/internal/dma_buf_allocator.h\"\n #include \"libcamera/internal/framebuffer.h\"\n+#include \"libcamera/internal/global_configuration.h\"\n #include \"libcamera/internal/mapped_framebuffer.h\"\n \n namespace libcamera {\n@@ -50,7 +51,9 @@ DebayerCpu::DebayerCpu(std::unique_ptr<SwStatsCpu> stats)\n \t * always set it to true as the safer choice but this should be changed in\n \t * future.\n \t */\n-\tenableInputMemcpy_ = true;\n+\tenableInputMemcpy_ = GlobalConfiguration::option<bool>(\n+\t\t\t\t \"pipelines.simple.copy_input_buffer\")\n+\t\t\t\t .value_or(true);\n \n \t/* Initialize color lookup tables */\n \tfor (unsigned int i = 0; i < DebayerParams::kRGBLookupSize; i++) {\n", "prefixes": [ "v8", "12/15" ] }