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{ "id": 24204, "url": "https://patchwork.libcamera.org/api/patches/24204/?format=api", "web_url": "https://patchwork.libcamera.org/patch/24204/", "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": "<20250824-b4-v0-5-2-gpuisp-v2-a-v2-22-96f4576c814e@linaro.org>", "date": "2025-08-24T00:48:34", "name": "[v2,22/37] libcamera: software_isp: gbm: Add in a GBM helper class for GPU surface access", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "6fcfd7d3359aa344f47abf2204271dadc36c782a", "submitter": { "id": 175, "url": "https://patchwork.libcamera.org/api/people/175/?format=api", "name": "Bryan O'Donoghue", "email": "bryan.odonoghue@linaro.org" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/24204/mbox/", "series": [ { "id": 5400, "url": "https://patchwork.libcamera.org/api/series/5400/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=5400", "date": "2025-08-24T00:48:12", "name": "Add GLES 2.0 GPUISP to libcamera", "version": 2, "mbox": "https://patchwork.libcamera.org/series/5400/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/24204/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/24204/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 0C09DBEFBE\n\tfor <parsemail@patchwork.libcamera.org>;\n\tSun, 24 Aug 2025 00:49:24 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 3FFB269312;\n\tSun, 24 Aug 2025 02:49:23 +0200 (CEST)", "from mail-wr1-x430.google.com (mail-wr1-x430.google.com\n\t[IPv6:2a00:1450:4864:20::430])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 7887A69317\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tSun, 24 Aug 2025 02:48:56 +0200 (CEST)", "by mail-wr1-x430.google.com with SMTP id\n\tffacd0b85a97d-3c79f0a5b8bso660159f8f.1\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tSat, 23 Aug 2025 17:48:56 -0700 (PDT)", "from [192.168.0.13] (188-141-3-146.dynamic.upc.ie. 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\n\tSat, 23 Aug 2025 17:48:55 -0700 (PDT)", "From": "Bryan O'Donoghue <bryan.odonoghue@linaro.org>", "Date": "Sun, 24 Aug 2025 01:48:34 +0100", "Subject": "[PATCH v2 22/37] libcamera: software_isp: gbm: Add in a GBM helper\n\tclass for GPU surface access", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "7bit", "Message-Id": "<20250824-b4-v0-5-2-gpuisp-v2-a-v2-22-96f4576c814e@linaro.org>", "References": "<20250824-b4-v0-5-2-gpuisp-v2-a-v2-0-96f4576c814e@linaro.org>", "In-Reply-To": "<20250824-b4-v0-5-2-gpuisp-v2-a-v2-0-96f4576c814e@linaro.org>", "To": "libcamera-devel@lists.libcamera.org", "Cc": "Bryan O'Donoghue <bryan.odonoghue@linaro.org>", "X-Mailer": "b4 0.14.2", "X-Developer-Signature": "v=1; a=openpgp-sha256; l=4346;\n\ti=bryan.odonoghue@linaro.org; h=from:subject:message-id;\n\tbh=egsSMfvlLEe6bXc52sk6IMnd2gt0PPvVs9ZsgHzSO90=;\n\tb=owEBbQKS/ZANAwAKASJxO7Ohjcg6AcsmYgBoqmFg1GoWTLssI0JidAMdp2Ruvm9b7J1y7yS4C\n\tmfpfmkZnwuJAjMEAAEKAB0WIQTmk/sqq6Nt4Rerb7QicTuzoY3IOgUCaKphYAAKCRAicTuzoY3I\n\tOtdPD/92DrNp7bLmefiMO7HIqCjzcBRjpPkt1PrQXqqnFAFo+ndKr3z7J1t6PKjj28/6kodO+3R\n\t5QYVm6wTH0gCRBYCGKc/EipFYOe+gMBaBlrB6zwBNFg0uZIHPJJGzNHXtDVRPE37S2pU+NNMY3P\n\tRWOrn00B1h5tpH7L4n0lMgayc2ziQ8+MDZDlCFaEDeO1ZZb79NNBli7nIOTIHv+Zwr6fcTGicd0\n\tgSIwTjOmnby3rszaOou3F7P9CBUivf3YoyvSO3gc1O4dKMbGH/iwamI5pBqgpuJTDU+xqcPgKnr\n\tqLYgFjLeqjKmK/6XLNr5SI8yR2lFACpFEuZrlPSyvwLtcF6odSDQ4RR59rdEzTLzsDsmHtumnxl\n\tc7nUkwLDZMbigiC8iYTJ+BJVikciiMyuFWuvz5eZvXaYB22WDmdJMSOY1Osgn5+pErIcPFzQLo1\n\t6pZF1CWpXU0cmNcI+bWvpl+VDTiqBtYu32VCZCczi3xG+iCTXax5U8h4fnbsB6NEvINureEQo4B\n\tlX0W9HI5sTLWwX5aCD0mWEa2Ef0I6KSS2CknRpmUCNNn1b/9qx50A940nhyi9tVwl5/1zclZFrp\n\tS/PUPO+ZhY8CeqHCG6NU8uNwVhFXu0Ysk7vsq8DH9zdh74kB3h0SaahPqNjsUPFeF56x8o+tNkS\n\tfaHEx28BWTjlXVQ==", "X-Developer-Key": "i=bryan.odonoghue@linaro.org; a=openpgp;\n\tfpr=E693FB2AABA36DE117AB6FB422713BB3A18DC83A", "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": "A helper class to interact with GBM. This will allow us to specify the\ninternal storage format of the CPU when making a texture for the Debayer\nvertext/fragment shaders and thus ensure we receive an uncompressed and\nuntiled output buffer.\n\nSigned-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>\n---\n include/libcamera/internal/gbm.h | 39 ++++++++++++++++++++++\n include/libcamera/internal/meson.build | 1 +\n src/libcamera/gbm.cpp | 61 ++++++++++++++++++++++++++++++++++\n src/libcamera/meson.build | 11 ++++++\n 4 files changed, 112 insertions(+)", "diff": "diff --git a/include/libcamera/internal/gbm.h b/include/libcamera/internal/gbm.h\nnew file mode 100644\nindex 0000000000000000000000000000000000000000..ccf7b2da54eebb1b69a5b7c050eed778c199ac8f\n--- /dev/null\n+++ b/include/libcamera/internal/gbm.h\n@@ -0,0 +1,39 @@\n+/* SPDX-License-Identifier: LGPL-2.1-or-later */\n+/*\n+ * Copyright (C) 2024, Linaro Ltd.\n+ *\n+ * Authors:\n+ * Bryan O'Donoghue <bryan.odonoghue@linaro.org>\n+ *\n+ * gbm.h - Helper class for managing GBM interactions.\n+ */\n+\n+#pragma once\n+\n+#include <gbm.h>\n+\n+#include <libcamera/base/log.h>\n+\n+#include <libcamera/formats.h>\n+\n+namespace libcamera {\n+\n+LOG_DECLARE_CATEGORY(GBM)\n+\n+class GBM\n+{\n+public:\n+\tGBM();\n+\t~GBM();\n+\n+\tint createDevice();\n+\tstruct gbm_device *getDevice() { return gbm_device_; }\n+\tPixelFormat getPixelFormat() { return format_; }\n+\n+private:\n+\tint fd_;\n+\tstruct gbm_device *gbm_device_;\n+\tPixelFormat format_;\n+};\n+\n+} // namespace libcamera\ndiff --git a/include/libcamera/internal/meson.build b/include/libcamera/internal/meson.build\nindex 90155857e44fc64803df5b5a054ad62e48b8e2f5..6c65254ddd95fbe9cbb6dadafc0826226b895a7f 100644\n--- a/include/libcamera/internal/meson.build\n+++ b/include/libcamera/internal/meson.build\n@@ -24,6 +24,7 @@ libcamera_internal_headers = files([\n 'dma_buf_allocator.h',\n 'formats.h',\n 'framebuffer.h',\n+ 'gbm.h',\n 'ipa_data_serializer.h',\n 'ipa_manager.h',\n 'ipa_module.h',\ndiff --git a/src/libcamera/gbm.cpp b/src/libcamera/gbm.cpp\nnew file mode 100644\nindex 0000000000000000000000000000000000000000..caf9ca1c742ce3269ec10f0b6394f9821dabd932\n--- /dev/null\n+++ b/src/libcamera/gbm.cpp\n@@ -0,0 +1,61 @@\n+/* SPDX-License-Identifier: LGPL-2.1-or-later */\n+/*\n+ * Copyright (C) 2024, Linaro Ltd.\n+ *\n+ * Authors:\n+ * Bryan O'Donoghue <bryan.odonoghue@linaro.org>\n+ *\n+ * egl.cpp - Helper class for managing GBM interactions.\n+ */\n+\n+#include \"libcamera/internal/gbm.h\"\n+\n+#include <fcntl.h>\n+#include <sys/ioctl.h>\n+#include <sys/mman.h>\n+#include <unistd.h>\n+\n+#include <linux/dma-buf.h>\n+#include <linux/dma-heap.h>\n+\n+namespace libcamera {\n+\n+LOG_DEFINE_CATEGORY(GBM)\n+\n+GBM::GBM()\n+{\n+\tfd_ = 0;\n+}\n+\n+GBM::~GBM()\n+{\n+\tif (gbm_device_)\n+\t\tgbm_device_destroy(gbm_device_);\n+\n+\tif (fd_ >= 0)\n+\t\tclose(fd_);\n+}\n+\n+int GBM::createDevice()\n+{\n+\tconst char *dri_node = \"/dev/dri/renderD128\"; //TODO: get from an env or config setting\n+\n+\tfd_ = open(dri_node, O_RDWR | O_CLOEXEC);\n+\tif (fd_ < 0) {\n+\t\tLOG(GBM, Error) << \"Open \" << dri_node << \" fail \" << fd_;\n+\t\treturn fd_;\n+\t}\n+\n+\tgbm_device_ = gbm_create_device(fd_);\n+\tif (!gbm_device_) {\n+\t\tLOG(GBM, Error) << \"gbm_crate_device fail\";\n+\t\tgoto fail;\n+\t}\n+\n+\tformat_ = libcamera::formats::ARGB8888;\n+\n+\treturn 0;\n+fail:\n+\treturn -ENODEV;\n+}\n+} //namespace libcamera\ndiff --git a/src/libcamera/meson.build b/src/libcamera/meson.build\nindex de1eb99b28fdb07b78b529ed21d9d584675d50ae..64270b571cea2ece8d4dfea8a23b8edf60de70d3 100644\n--- a/src/libcamera/meson.build\n+++ b/src/libcamera/meson.build\n@@ -68,6 +68,16 @@ libcamera_deps = []\n libatomic = cc.find_library('atomic', required : false)\n libthreads = dependency('threads')\n \n+libgbm = cc.find_library('gbm', required: false)\n+gbm_works = cc.check_header('gbm.h', required: false) \n+\n+if libgbm.found() and gbm_works\n+ config_h.set('HAVE_GBM', 1)\n+ libcamera_internal_sources += files([\n+ 'gbm.cpp',\n+ ])\n+endif\n+\n subdir('base')\n subdir('converter')\n subdir('ipa')\n@@ -181,6 +191,7 @@ libcamera_deps += [\n libcamera_base_private,\n libcrypto,\n libdl,\n+ libgbm,\n liblttng,\n libudev,\n libyaml,\n", "prefixes": [ "v2", "22/37" ] }