[wayland] Add a basic drm/kms backend
Introduces a new (optional) dependency: libdrm. The DrmBackend currently supports finding the first connected output. It can create shared memory buffers which are used by SceneQPainter to do double buffered rendering. There is still lots to do, the following things are not yet working: * multiple outputs * page flip * OpenGL (through gbm) * restoring mode setting to start valuemaster
Martin Gräßlin
10 years ago
parent
da3f7914f7
commit
c759551340
@ -0,0 +1,126 @@
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#.rst:
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# FindLibdrm
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# -------
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#
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# Try to find libdrm on a Unix system.
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#
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# This will define the following variables:
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#
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# ``Libdrm_FOUND``
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# True if (the requested version of) libdrm is available
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# ``Libdrm_VERSION``
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# The version of libdrm
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# ``Libdrm_LIBRARIES``
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# This can be passed to target_link_libraries() instead of the ``Libdrm::Libdrm``
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# target
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# ``Libdrm_INCLUDE_DIRS``
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# This should be passed to target_include_directories() if the target is not
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# used for linking
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# ``Libdrm_DEFINITIONS``
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# This should be passed to target_compile_options() if the target is not
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# used for linking
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#
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# If ``Libdrm_FOUND`` is TRUE, it will also define the following imported target:
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#
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# ``Libdrm::Libdrm``
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# The libdrm library
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#
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# In general we recommend using the imported target, as it is easier to use.
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# Bear in mind, however, that if the target is in the link interface of an
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# exported library, it must be made available by the package config file.
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#=============================================================================
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# Copyright 2014 Alex Merry <alex.merry@kde.org>
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# Copyright 2014 Martin Gräßlin <mgraesslin@kde.org>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 3. The name of the author may not be used to endorse or promote products
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# derived from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#=============================================================================
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if(CMAKE_VERSION VERSION_LESS 2.8.12)
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message(FATAL_ERROR "CMake 2.8.12 is required by FindLibdrm.cmake")
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endif()
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if(CMAKE_MINIMUM_REQUIRED_VERSION VERSION_LESS 2.8.12)
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message(AUTHOR_WARNING "Your project should require at least CMake 2.8.12 to use FindLibdrm.cmake")
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endif()
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if(NOT WIN32)
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# Use pkg-config to get the directories and then use these values
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# in the FIND_PATH() and FIND_LIBRARY() calls
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find_package(PkgConfig)
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pkg_check_modules(PKG_Libdrm QUIET libdrm)
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set(Libdrm_DEFINITIONS ${PKG_Libdrm_CFLAGS_OTHER})
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set(Libdrm_VERSION ${PKG_Libdrm_VERSION})
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find_path(Libdrm_INCLUDE_DIR
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NAMES
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xf86drm.h
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HINTS
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${PKG_Libdrm_INCLUDE_DIRS}
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)
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find_library(Libdrm_LIBRARY
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NAMES
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drm
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HINTS
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${PKG_Libdrm_LIBRARY_DIRS}
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)
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(Libdrm
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FOUND_VAR
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Libdrm_FOUND
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REQUIRED_VARS
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Libdrm_LIBRARY
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Libdrm_INCLUDE_DIR
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VERSION_VAR
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Libdrm_VERSION
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)
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if(Libdrm_FOUND AND NOT TARGET Libdrm::Libdrm)
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add_library(Libdrm::Libdrm UNKNOWN IMPORTED)
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set_target_properties(Libdrm::Libdrm PROPERTIES
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IMPORTED_LOCATION "${Libdrm_LIBRARY}"
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INTERFACE_COMPILE_OPTIONS "${Libdrm_DEFINITIONS}"
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INTERFACE_INCLUDE_DIRECTORIES "${Libdrm_INCLUDE_DIR}"
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INTERFACE_INCLUDE_DIRECTORIES "${Libdrm_INCLUDE_DIR}/libdrm"
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)
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endif()
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mark_as_advanced(Libdrm_LIBRARY Libdrm_INCLUDE_DIR)
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# compatibility variables
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set(Libdrm_LIBRARIES ${Libdrm_LIBRARY})
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set(Libdrm_INCLUDE_DIRS ${Libdrm_INCLUDE_DIR})
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set(Libdrm_VERSION_STRING ${Libdrm_VERSION})
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else()
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message(STATUS "FindLibdrm.cmake cannot find libdrm on Windows systems.")
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set(Libdrm_FOUND FALSE)
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endif()
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include(FeatureSummary)
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set_package_properties(Libdrm PROPERTIES
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URL "https://wiki.freedesktop.org/dri/"
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DESCRIPTION "Userspace interface to kernel DRM services."
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)
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@ -0,0 +1,212 @@
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/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2015 Martin Gräßlin <mgraesslin@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#include "drm_backend.h"
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#include "logind.h"
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#include "scene_qpainter.h"
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#include "screens_drm.h"
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#include "udev.h"
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#include "utils.h"
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#include "virtual_terminal.h"
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// system
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#include <unistd.h>
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#include <sys/mman.h>
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// drm
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#include <xf86drm.h>
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#include <xf86drmMode.h>
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#include <libdrm/drm_mode.h>
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#include <QDebug>
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namespace KWin
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{
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DrmBackend::DrmBackend(QObject *parent)
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: AbstractBackend(parent)
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, m_udev(new Udev)
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{
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}
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DrmBackend::~DrmBackend()
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{
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if (m_fd >= 0) {
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close(m_fd);
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}
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}
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void DrmBackend::init()
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{
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LogindIntegration *logind = LogindIntegration::self();
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auto takeControl = [logind, this]() {
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if (logind->hasSessionControl()) {
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openDrm();
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} else {
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logind->takeControl();
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connect(logind, &LogindIntegration::hasSessionControlChanged, this, &DrmBackend::openDrm);
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}
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};
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if (logind->isConnected()) {
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takeControl();
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} else {
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connect(logind, &LogindIntegration::connectedChanged, this, takeControl);
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}
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VirtualTerminal::create(this);
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}
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void DrmBackend::openDrm()
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{
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VirtualTerminal::self()->init();
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UdevDevice::Ptr device = m_udev->primaryGpu();
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if (!device) {
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qCWarning(KWIN_CORE) << "Did not find a GPU";
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return;
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}
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int fd = LogindIntegration::self()->takeDevice(device->devNode());
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if (fd < 0) {
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qCWarning(KWIN_CORE) << "failed to open drm device at" << device->devNode();
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return;
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}
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m_fd = fd;
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m_drmId = device->sysNum();
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queryResources();
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emit screensQueried();
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}
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template <typename Pointer, void (*cleanupFunc)(Pointer*)>
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struct DrmCleanup
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{
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static inline void cleanup(Pointer *ptr)
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{
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cleanupFunc(ptr);
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}
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};
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template <typename T, void (*cleanupFunc)(T*)> using ScopedDrmPointer = QScopedPointer<T, DrmCleanup<T, cleanupFunc>>;
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void DrmBackend::queryResources()
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{
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if (m_fd < 0) {
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return;
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}
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ScopedDrmPointer<_drmModeRes, &drmModeFreeResources> resources(drmModeGetResources(m_fd));
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if (!resources) {
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qCWarning(KWIN_CORE) << "drmModeGetResources failed";
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return;
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}
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for (int i = 0; i < resources->count_connectors; ++i) {
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const auto id = resources->connectors[i];
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ScopedDrmPointer<_drmModeConnector, &drmModeFreeConnector> connector(drmModeGetConnector(m_fd, id));
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if (!connector) {
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continue;
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}
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if (connector->connection != DRM_MODE_CONNECTED) {
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continue;
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}
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ScopedDrmPointer<_drmModeEncoder, &drmModeFreeEncoder> encoder(drmModeGetEncoder(m_fd, connector->encoder_id));
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if (!encoder) {
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continue;
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}
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ScopedDrmPointer<_drmModeCrtc, &drmModeFreeCrtc> crtc(drmModeGetCrtc(m_fd, encoder->crtc_id));
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if (!crtc) {
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continue;
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}
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m_resolution = QSize(crtc->mode.hdisplay, crtc->mode.vdisplay);
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m_crtcId = encoder->crtc_id;
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m_connector = connector->connector_id;
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m_mode = crtc->mode;
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// for the moment only one crtc
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break;
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}
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}
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void DrmBackend::present(DrmBuffer *buffer)
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{
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drmModeSetCrtc(m_fd, m_crtcId, buffer->m_bufferId, 0, 0, &m_connector, 1, &m_mode);
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}
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Screens *DrmBackend::createScreens(QObject *parent)
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{
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return new DrmScreens(this, parent);
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}
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QPainterBackend *DrmBackend::createQPainterBackend()
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{
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return new DrmQPainterBackend(this);
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}
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DrmBuffer *DrmBackend::createBuffer(const QSize &size)
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{
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return new DrmBuffer(this, size);
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}
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DrmBuffer::DrmBuffer(DrmBackend *backend, const QSize &size)
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: m_backend(backend)
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, m_size(size)
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{
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drm_mode_create_dumb createArgs;
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memset(&createArgs, 0, sizeof createArgs);
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createArgs.bpp = 32;
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createArgs.width = size.width();
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createArgs.height = size.height();
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if (drmIoctl(m_backend->fd(), DRM_IOCTL_MODE_CREATE_DUMB, &createArgs) != 0) {
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return;
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}
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m_handle = createArgs.handle;
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m_bufferSize = createArgs.size;
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m_stride = createArgs.pitch;
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drmModeAddFB(m_backend->fd(), size.width(), size.height(), 24, 32,
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m_stride, createArgs.handle, &m_bufferId);
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}
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DrmBuffer::~DrmBuffer()
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{
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delete m_image;
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if (m_memory) {
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munmap(m_memory, m_bufferSize);
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}
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if (m_bufferId) {
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drmModeRmFB(m_backend->fd(), m_bufferId);
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}
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if (m_handle) {
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drm_mode_destroy_dumb destroyArgs;
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destroyArgs.handle = m_handle;
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drmIoctl(m_backend->fd(), DRM_IOCTL_MODE_DESTROY_DUMB, &destroyArgs);
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}
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}
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bool DrmBuffer::map()
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{
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if (!m_handle || !m_bufferId) {
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return false;
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}
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drm_mode_map_dumb mapArgs;
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memset(&mapArgs, 0, sizeof mapArgs);
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mapArgs.handle = m_handle;
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if (drmIoctl(m_backend->fd(), DRM_IOCTL_MODE_MAP_DUMB, &mapArgs) != 0) {
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return false;
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}
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void *address = mmap(nullptr, m_bufferSize, PROT_WRITE, MAP_SHARED, m_backend->fd(), mapArgs.offset);
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if (address == MAP_FAILED) {
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return false;
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}
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m_memory = address;
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m_image = new QImage((uchar*)m_memory, m_size.width(), m_size.height(), m_stride, QImage::Format_RGB32);
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return !m_image->isNull();
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}
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}
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@ -0,0 +1,99 @@
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/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2015 Martin Gräßlin <mgraesslin@kde.org>
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|
||||
This program is free software; you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation; either version 2 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#ifndef KWIN_DRM_BACKEND_H
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#define KWIN_DRM_BACKEND_H
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#include "abstract_backend.h"
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#include <QImage>
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#include <QSize>
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#include <xf86drmMode.h>
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namespace KWin
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{
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class Udev;
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class DrmBuffer;
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class KWIN_EXPORT DrmBackend : public AbstractBackend
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{
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Q_OBJECT
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public:
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explicit DrmBackend(QObject *parent = nullptr);
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virtual ~DrmBackend();
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Screens *createScreens(QObject *parent = nullptr) override;
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QPainterBackend *createQPainterBackend() override;
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void init();
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DrmBuffer *createBuffer(const QSize &size);
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void present(DrmBuffer *buffer);
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QSize size() const {
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// TODO: this is wrong
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return m_resolution;
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}
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int fd() const {
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return m_fd;
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}
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Q_SIGNALS:
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void screensQueried();
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private:
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void openDrm();
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void queryResources();
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QScopedPointer<Udev> m_udev;
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int m_fd = -1;
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int m_drmId = 0;
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// TODO: this is wrong
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QSize m_resolution;
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quint32 m_crtcId = 0;
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quint32 m_connector = 0;
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drmModeModeInfo m_mode;
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};
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class DrmBuffer
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{
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public:
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~DrmBuffer();
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bool map();
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QImage *image() const {
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return m_image;
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}
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private:
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friend class DrmBackend;
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DrmBuffer(DrmBackend *backend, const QSize &size);
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DrmBackend *m_backend;
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QSize m_size;
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quint32 m_handle = 0;
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quint32 m_bufferId = 0;
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quint32 m_stride = 0;
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quint64 m_bufferSize = 0;
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void *m_memory = nullptr;
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QImage *m_image = nullptr;
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};
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}
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#endif
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@ -0,0 +1,68 @@
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/********************************************************************
|
||||
KWin - the KDE window manager
|
||||
This file is part of the KDE project.
|
||||
|
||||
Copyright (C) 2015 Martin Gräßlin <mgraesslin@kde.org>
|
||||
|
||||
This program is free software; you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation; either version 2 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*********************************************************************/
|
||||
#include "screens_drm.h"
|
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#include "drm_backend.h"
|
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|
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namespace KWin
|
||||
{
|
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|
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DrmScreens::DrmScreens(DrmBackend *backend, QObject *parent)
|
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: Screens(parent)
|
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, m_backend(backend)
|
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{
|
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}
|
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|
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DrmScreens::~DrmScreens() = default;
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|
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void DrmScreens::init()
|
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{
|
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KWin::Screens::init();
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updateCount();
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emit changed();
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}
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|
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QRect DrmScreens::geometry(int screen) const
|
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{
|
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if (screen == 0) {
|
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return QRect(QPoint(0, 0), size(screen));
|
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}
|
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return QRect();
|
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}
|
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|
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QSize DrmScreens::size(int screen) const
|
||||
{
|
||||
if (screen == 0) {
|
||||
return m_backend->size();
|
||||
}
|
||||
return QSize();
|
||||
}
|
||||
|
||||
void DrmScreens::updateCount()
|
||||
{
|
||||
setCount(1);
|
||||
}
|
||||
|
||||
int DrmScreens::number(const QPoint &pos) const
|
||||
{
|
||||
Q_UNUSED(pos)
|
||||
return 0;
|
||||
}
|
||||
|
||||
}
|
||||
@ -0,0 +1,46 @@
|
||||
/********************************************************************
|
||||
KWin - the KDE window manager
|
||||
This file is part of the KDE project.
|
||||
|
||||
Copyright (C) 2015 Martin Gräßlin <mgraesslin@kde.org>
|
||||
|
||||
This program is free software; you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation; either version 2 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*********************************************************************/
|
||||
#ifndef KWIN_SCREENS_DRM_H
|
||||
#define KWIN_SCREENS_DRM_H
|
||||
#include "screens.h"
|
||||
|
||||
namespace KWin
|
||||
{
|
||||
class DrmBackend;
|
||||
|
||||
class DrmScreens : public Screens
|
||||
{
|
||||
Q_OBJECT
|
||||
public:
|
||||
DrmScreens(DrmBackend *backend, QObject *parent = nullptr);
|
||||
virtual ~DrmScreens();
|
||||
void init() override;
|
||||
QRect geometry(int screen) const override;
|
||||
int number(const QPoint &pos) const override;
|
||||
QSize size(int screen) const override;
|
||||
void updateCount() override;
|
||||
|
||||
private:
|
||||
DrmBackend *m_backend;
|
||||
};
|
||||
|
||||
}
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue