{"id":27509,"url":"https://patchwork.libcamera.org/api/patches/27509/?format=json","web_url":"https://patchwork.libcamera.org/patch/27509/","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":"<20260727064152.2161526-1-qi.hou@oss.nxp.com>","date":"2026-07-27T06:41:52","name":"[v2] libcamera: egl: Pass EGLDisplay to eGL constructor to avoid double init","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"9efbbe8cdd9611dc296edb71d281a591d8e8f5d5","submitter":{"id":455,"url":"https://patchwork.libcamera.org/api/people/455/?format=json","name":"Qi Hou (OSS)","email":"qi.hou@oss.nxp.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/27509/mbox/","series":[{"id":6084,"url":"https://patchwork.libcamera.org/api/series/6084/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=6084","date":"2026-07-27T06:41:52","name":"[v2] libcamera: egl: Pass EGLDisplay to eGL constructor to avoid double init","version":2,"mbox":"https://patchwork.libcamera.org/series/6084/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/27509/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/27509/checks/","tags":{},"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 2F268C328C\n\tfor ;\n\tMon, 27 Jul 2026 06:42:07 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id A744E67F53;\n\tMon, 27 Jul 2026 08:42:05 +0200 (CEST)","from AM0PR83CU005.outbound.protection.outlook.com\n\t(mail-westeuropeazlp170100001.outbound.protection.outlook.com\n\t[IPv6:2a01:111:f403:c201::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 4558867E5C\n\tfor ;\n\tMon, 27 Jul 2026 08:42:03 +0200 (CEST)","from AM9PR04MB7556.eurprd04.prod.outlook.com\n\t(2603:10a6:20b:2df::11)\n\tby MI3PR04MB12659.eurprd04.prod.outlook.com (2603:10a6:290:80::18)\n\twith Microsoft SMTP Server (version=TLS1_2,\n\tcipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.245.13;\n\tMon, 27 Jul 2026 06:42:01 +0000","from AM9PR04MB7556.eurprd04.prod.outlook.com\n\t([fe80::8599:94b0:43ea:32ed]) by\n\tAM9PR04MB7556.eurprd04.prod.outlook.com\n\t([fe80::8599:94b0:43ea:32ed%7]) with mapi id 15.21.0245.012;\n\tMon, 27 Jul 2026 06:42:01 +0000"],"Authentication-Results":["lancelot.ideasonboard.com; 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When SoftwareIsp subsequently created a DebayerEGL\ninstance, initEGLContext() would call probeDisplay() again, repeating\nthe full initialisation.\n\nFix this by reusing the display obtained during the availability check.\nprobeDisplay() is promoted to a public static method and isAvailable()\nis removed. The eGL constructor now takes the EGLDisplay as a parameter\nand stores it directly, so initEGLContext() no longer needs to call\nprobeDisplay(). DebayerEGL is updated to accept and forward the display\nto eGL, and SoftwareIsp calls eGL::probeDisplay() once, passing the\nresult straight to DebayerEGL when EGL is available.\n\nSigned-off-by: Qi Hou \n---\n include/libcamera/internal/egl.h | 5 ++-\n src/libcamera/egl.cpp | 38 +++++++--------------\n src/libcamera/software_isp/debayer_egl.cpp | 5 +--\n src/libcamera/software_isp/debayer_egl.h | 2 +-\n src/libcamera/software_isp/software_isp.cpp | 5 +--\n 5 files changed, 21 insertions(+), 34 deletions(-)","diff":"diff --git a/include/libcamera/internal/egl.h b/include/libcamera/internal/egl.h\nindex 1e31d490b..7ef1ca0d9 100644\n--- a/include/libcamera/internal/egl.h\n+++ b/include/libcamera/internal/egl.h\n@@ -99,11 +99,11 @@ private:\n class eGL\n {\n public:\n-\teGL();\n+\teGL(EGLDisplay display);\n \t~eGL();\n \n \tint initEGLContext();\n-\tstatic bool isAvailable();\n+\tstatic EGLDisplay probeDisplay();\n \n \tint createInputDMABufTexture2D(eGLImage &eglImage, int fd);\n \tint createOutputDMABufTexture2D(eGLImage &eglImage, int fd);\n@@ -137,7 +137,6 @@ private:\n \tEGLContext context_ = EGL_NO_CONTEXT;\n \tEGLSurface surface_ = EGL_NO_SURFACE;\n \n-\tstatic EGLDisplay probeDisplay();\n \tint compileShader(int shaderType, GLuint &shaderId, Span shaderData,\n \t\t\t Span shaderEnv);\n \ndiff --git a/src/libcamera/egl.cpp b/src/libcamera/egl.cpp\nindex 7ec7a654d..b5ed0e13a 100644\n--- a/src/libcamera/egl.cpp\n+++ b/src/libcamera/egl.cpp\n@@ -64,12 +64,15 @@ LOG_DEFINE_CATEGORY(eGL)\n \n /**\n * \\brief Construct an EGL helper\n+ * \\param[in] display The EGL display to use\n *\n * Creates an eGL instance with uninitialised context. Call initEGLContext()\n- * to set up the EGL display, context, and load extension functions.\n+ * to set up the EGL context, and load extension functions.\n */\n-eGL::eGL()\n+eGL::eGL(EGLDisplay display)\n+\t: display_(display)\n {\n+\tASSERT(display_ != EGL_NO_DISPLAY);\n }\n \n /**\n@@ -299,6 +302,13 @@ void eGL::createTexture2D(eGLImage &eglImage, void *data)\n \tglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);\n }\n \n+/**\n+ * \\brief Try to create an EGL display for surfaceless rendering\n+ *\n+ * Tries to create an EGL display for surfaceless rendering.\n+ *\n+ * \\return A EGL display handle if successful, otherwise \\a EGL_NO_DISPLAY\n+ */\n EGLDisplay eGL::probeDisplay()\n {\n \tEGLDisplay display;\n@@ -325,24 +335,6 @@ EGLDisplay eGL::probeDisplay()\n \treturn display;\n }\n \n-/**\n- * \\brief Probe whether EGL surfaceless rendering is available\n- *\n- * Checks if an EGL surfaceless display can be obtained and initialised.\n- * The display is immediately terminated so that no resources are leaked.\n- *\n- * \\return True if EGL surfaceless rendering is available, false otherwise\n- */\n-bool eGL::isAvailable()\n-{\n-\tEGLDisplay display = probeDisplay();\n-\tif (display == EGL_NO_DISPLAY)\n-\t\treturn false;\n-\n-\teglTerminate(display);\n-\treturn true;\n-}\n-\n /**\n * \\brief Update a 2D texture already created\n * \\param[in,out] eglImage EGL image to associate with the texture\n@@ -403,12 +395,6 @@ int eGL::initEGLContext()\n \tEGLint numConfigs;\n \tEGLConfig config;\n \n-\tdisplay_ = probeDisplay();\n-\tif (display_ == EGL_NO_DISPLAY) {\n-\t\tLOG(eGL, Error) << \"Unable to probe display\";\n-\t\tgoto fail;\n-\t}\n-\n \tLOG(eGL, Info) << \"EGL: EGL_VERSION: \" << eglQueryString(display_, EGL_VERSION);\n \tLOG(eGL, Info) << \"EGL: EGL_VENDOR: \" << eglQueryString(display_, EGL_VENDOR);\n \tLOG(eGL, Info) << \"EGL: EGL_CLIENT_APIS: \" << eglQueryString(display_, EGL_CLIENT_APIS);\ndiff --git a/src/libcamera/software_isp/debayer_egl.cpp b/src/libcamera/software_isp/debayer_egl.cpp\nindex dd2041219..20b478b1c 100644\n--- a/src/libcamera/software_isp/debayer_egl.cpp\n+++ b/src/libcamera/software_isp/debayer_egl.cpp\n@@ -40,9 +40,10 @@ namespace libcamera {\n * \\brief Construct a DebayerEGL object\n * \\param[in] stats Statistics processing object\n * \\param[in] cm The camera manager\n+ * \\param[in] display The EGL display to use\n */\n-DebayerEGL::DebayerEGL(std::unique_ptr stats, const CameraManager &cm)\n-\t: Debayer(cm), stats_(std::move(stats))\n+DebayerEGL::DebayerEGL(std::unique_ptr stats, const CameraManager &cm, EGLDisplay display)\n+\t: Debayer(cm), stats_(std::move(stats)), egl_(display)\n {\n }\n \ndiff --git a/src/libcamera/software_isp/debayer_egl.h b/src/libcamera/software_isp/debayer_egl.h\nindex e613639f5..30e51a477 100644\n--- a/src/libcamera/software_isp/debayer_egl.h\n+++ b/src/libcamera/software_isp/debayer_egl.h\n@@ -40,7 +40,7 @@ class CameraManager;\n class DebayerEGL : public Debayer\n {\n public:\n-\tDebayerEGL(std::unique_ptr stats, const CameraManager &cm);\n+\tDebayerEGL(std::unique_ptr stats, const CameraManager &cm, EGLDisplay display);\n \t~DebayerEGL();\n \n \tint configure(const StreamConfiguration &inputCfg,\ndiff --git a/src/libcamera/software_isp/software_isp.cpp b/src/libcamera/software_isp/software_isp.cpp\nindex c73a16ce0..c7165771c 100644\n--- a/src/libcamera/software_isp/software_isp.cpp\n+++ b/src/libcamera/software_isp/software_isp.cpp\n@@ -120,8 +120,9 @@ SoftwareIsp::SoftwareIsp(PipelineHandler *pipe, const CameraSensor *sensor,\n \t}\n \n \tif (!softISPMode || softISPMode == \"gpu\") {\n-\t\tif (eGL::isAvailable()) {\n-\t\t\tdebayer_ = std::make_unique(std::move(stats), cm);\n+\t\tauto display = eGL::probeDisplay();\n+\t\tif (display != EGL_NO_DISPLAY) {\n+\t\t\tdebayer_ = std::make_unique(std::move(stats), cm, display);\n \t\t} else {\n \t\t\tLOG(SoftwareIsp, Info)\n \t\t\t\t<< \"EGL not available, falling back to CPU debayer\";\n","prefixes":["v2"]}