{"id":26768,"url":"https://patchwork.libcamera.org/api/covers/26768/?format=json","web_url":"https://patchwork.libcamera.org/cover/26768/","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":"<20260518201508.140849-1-robert.mader@collabora.com>","date":"2026-05-18T20:15:04","name":"[v2,0/4] software_isp: Implement DMABuf import for input buffers","submitter":{"id":140,"url":"https://patchwork.libcamera.org/api/people/140/?format=json","name":"Robert Mader","email":"robert.mader@collabora.com"},"mbox":"https://patchwork.libcamera.org/cover/26768/mbox/","series":[{"id":5953,"url":"https://patchwork.libcamera.org/api/series/5953/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=5953","date":"2026-05-18T20:15:04","name":"software_isp: Implement DMABuf import for input buffers","version":2,"mbox":"https://patchwork.libcamera.org/series/5953/mbox/"}],"comments":"https://patchwork.libcamera.org/api/covers/26768/comments/","headers":{"Return-Path":"","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 ADF4BBDCBD\n\tfor ;\n\tMon, 18 May 2026 20:15:40 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id A2AC563024;\n\tMon, 18 May 2026 22:15:39 +0200 (CEST)","from sender4-pp-f112.zoho.com (sender4-pp-f112.zoho.com\n\t[136.143.188.112])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 8E12962FB1\n\tfor ;\n\tMon, 18 May 2026 22:15:37 +0200 (CEST)","by mx.zohomail.com with SMTPS id 1779135333277683.8323084347467;\n\tMon, 18 May 2026 13:15:33 -0700 (PDT)"],"Authentication-Results":"lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=collabora.com\n\theader.i=robert.mader@collabora.com header.b=\"fFKK69MA\"; \n\tdkim-atps=neutral","ARC-Seal":"i=1; a=rsa-sha256; t=1779135334; cv=none; \n\td=zohomail.com; s=zohoarc; \n\tb=T6XfFqniSOGFXfP8uqwcBf53TMLwz97gUXzS0puABNyvi+ojYhjKmf5R254fSnM4da5RCm4LZTcHvL5qo51K4Gv3drI00fwEHphRs/gRlkZ8z3pg7uySm/E63KAkEjTgEhkQirJDWKoZTYMAVz9WJbbE8XDVLkkheuEei/3mYas=","ARC-Message-Signature":"i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; \n\ts=zohoarc; t=1779135334;\n\th=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:MIME-Version:Message-ID:Subject:Subject:To:To:Message-Id:Reply-To;\n\tbh=fyxzNveD2qbjfBCoBwmVDXG58MdJKEBLtCP/X8T4GlU=; \n\tb=SfwzF2LiReJOE5vuj6jeDPFs2Ti32n0dWeHCoy4SFj9UZ1BCckoVCCCoeKhdoQcd+Hg0dH+mxLIx6atSrom0og4tTK9Q/LyaqhHaihkp2091gxzfPfXIDw/322bVPjRPrWk6bX8z/oHTzCrnp6363sBLvl5oqggdQ9/GF6ch+7g=","ARC-Authentication-Results":"i=1; mx.zohomail.com;\n\tdkim=pass header.i=collabora.com;\n\tspf=pass smtp.mailfrom=robert.mader@collabora.com;\n\tdmarc=pass header.from=","DKIM-Signature":"v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1779135334;\n\ts=zohomail; d=collabora.com; i=robert.mader@collabora.com;\n\th=From:From:To:To:Cc:Cc:Subject:Subject:Date:Date:Message-ID:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-Id:Reply-To;\n\tbh=fyxzNveD2qbjfBCoBwmVDXG58MdJKEBLtCP/X8T4GlU=;\n\tb=fFKK69MA8K7M8mF8SCGqfSycKZ4Nx6+AH59FIsCcHYFWbmb5lBaCQoPvxM6MwYxe\n\tsKImN3wEPFrEZ/q16Dg7Otsr/tbY4x2oyS46pm6H27vRKkAeMP0vzdUt7UKMWVr/WHJ\n\t7wJ0Io/XK5BrhyR+R0DChEAs9l6nAZK5Nrz0S5rI=","From":"Robert Mader ","To":"libcamera-devel@lists.libcamera.org","Cc":"Robert Mader ","Subject":"[PATCH v2 0/4] software_isp: Implement DMABuf import for input\n\tbuffers","Date":"Mon, 18 May 2026 22:15:04 +0200","Message-ID":"<20260518201508.140849-1-robert.mader@collabora.com>","X-Mailer":"git-send-email 2.54.0","MIME-Version":"1.0","Content-Type":"text/plain; charset=UTF-8","Content-Transfer-Encoding":"8bit","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"From the main commit:\nIn many cases we can import the GPU-ISP input buffer, a dmabuf from v4l2,\ndirectly into EGL instead of mapping and uploading - i.e. copying - it.\nThis reduces memory bandwidth and CPU usage and can slightly improve\nlatency.\n\nNotes: Previous iterations of these patches have already been tested on\nvarious platforms, without known regressions and showing significant\nimprovements.\n\nChanges in v2:\n- Instead of adding parameters to createInputDMABufTexture2D(), remove\n them from createTexture2D instead.\n- Use std::optional to make the code easier to understand.\n- Move error log level change into its own commit.\n\nRobert Mader (4):\n egl: Set more eGLImage paramters in constructor\n egl: Demote an error log to debug\n debayer_egl: Implement dmabuf import for input buffers\n debayer_egl: Sync output buffer after processing stats\n\n include/libcamera/internal/egl.h | 7 ++--\n src/libcamera/egl.cpp | 31 ++++++++++----\n src/libcamera/software_isp/debayer_egl.cpp | 49 ++++++++++++----------\n src/libcamera/software_isp/debayer_egl.h | 2 +-\n 4 files changed, 55 insertions(+), 34 deletions(-)"}