Multi-screen handling for the eglfs_kms_egldevice backend

Separates the generic kms classes into a own kms static lib
called QtEglFsKmsSupport. The eglfs_kms plugin was changed
to use these base classes and got renamed accordingly to
QEglFSKmsGbm*.

The eglfs_kms_egldevice plugin got extended to also derive
from the kms base classed and by this provides multi-screen
support

Change-Id: I6de6a754e94cb8d52cf8e658b03c6bd6637674a1
Reviewed-by: Laszlo Agocs <laszlo.agocs@theqtcompany.com>

1 files changed, 220 insertions, 0 deletions

diff --git a/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms_support/qeglfskmsscreen.cpp b/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms_support/qeglfskmsscreen.cpp
new file mode 100644
index 0000000000..f614351a40
--- /dev/null
+++ b/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms_support/qeglfskmsscreen.cpp
@@ -0,0 +1,220 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 Pier Luigi Fiorini <pierluigi.fiorini@gmail.com>
+** Copyright (C) 2016 The Qt Company Ltd.
+** Copyright (C) 2016 Pelagicore AG
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qeglfskmsscreen.h"
+#include "qeglfskmsdevice.h"
+#include "qeglfsintegration.h"
+
+#include <QtCore/QLoggingCategory>
+
+#include <QtGui/private/qguiapplication_p.h>
+#include <QtPlatformSupport/private/qfbvthandler_p.h>
+
+QT_BEGIN_NAMESPACE
+
+Q_DECLARE_LOGGING_CATEGORY(qLcEglfsKmsDebug)
+
+class QEglFSKmsInterruptHandler : public QObject
+{
+public:
+    QEglFSKmsInterruptHandler(QEglFSKmsScreen *screen) : m_screen(screen) {
+        m_vtHandler = static_cast<QEglFSIntegration *>(QGuiApplicationPrivate::platformIntegration())->vtHandler();
+        connect(m_vtHandler, &QFbVtHandler::interrupted, this, &QEglFSKmsInterruptHandler::restoreVideoMode);
+        connect(m_vtHandler, &QFbVtHandler::aboutToSuspend, this, &QEglFSKmsInterruptHandler::restoreVideoMode);
+    }
+
+public slots:
+    void restoreVideoMode() { m_screen->restoreMode(); }
+
+private:
+    QFbVtHandler *m_vtHandler;
+    QEglFSKmsScreen *m_screen;
+};
+
+QEglFSKmsScreen::QEglFSKmsScreen(QEglFSKmsIntegration *integration,
+                                 QEglFSKmsDevice *device,
+                                 QEglFSKmsOutput output,
+                                 QPoint position)
+    : QEglFSScreen(eglGetDisplay(reinterpret_cast<EGLNativeDisplayType>(device->device())))
+    , m_integration(integration)
+    , m_device(device)
+    , m_output(output)
+    , m_pos(position)
+    , m_powerState(PowerStateOn)
+    , m_interruptHandler(new QEglFSKmsInterruptHandler(this))
+{
+    m_siblings << this;
+}
+
+QEglFSKmsScreen::~QEglFSKmsScreen()
+{
+    if (m_output.dpms_prop) {
+        drmModeFreeProperty(m_output.dpms_prop);
+        m_output.dpms_prop = Q_NULLPTR;
+    }
+    restoreMode();
+    if (m_output.saved_crtc) {
+        drmModeFreeCrtc(m_output.saved_crtc);
+        m_output.saved_crtc = Q_NULLPTR;
+    }
+    delete m_interruptHandler;
+}
+
+QRect QEglFSKmsScreen::geometry() const
+{
+    const int mode = m_output.mode;
+    return QRect(m_pos.x(), m_pos.y(),
+                 m_output.modes[mode].hdisplay,
+                 m_output.modes[mode].vdisplay);
+}
+
+int QEglFSKmsScreen::depth() const
+{
+    return 32;
+}
+
+QImage::Format QEglFSKmsScreen::format() const
+{
+    return QImage::Format_RGB32;
+}
+
+QSizeF QEglFSKmsScreen::physicalSize() const
+{
+    return m_output.physical_size;
+}
+
+QDpi QEglFSKmsScreen::logicalDpi() const
+{
+    const QSizeF ps = physicalSize();
+    const QSize s = geometry().size();
+
+    if (!ps.isEmpty() && !s.isEmpty())
+        return QDpi(25.4 * s.width() / ps.width(),
+                    25.4 * s.height() / ps.height());
+    else
+        return QDpi(100, 100);
+}
+
+Qt::ScreenOrientation QEglFSKmsScreen::nativeOrientation() const
+{
+    return Qt::PrimaryOrientation;
+}
+
+Qt::ScreenOrientation QEglFSKmsScreen::orientation() const
+{
+    return Qt::PrimaryOrientation;
+}
+
+QString QEglFSKmsScreen::name() const
+{
+    return m_output.name;
+}
+
+void QEglFSKmsScreen::destroySurface()
+{
+}
+
+void QEglFSKmsScreen::waitForFlip()
+{
+}
+
+void QEglFSKmsScreen::flip()
+{
+}
+
+void QEglFSKmsScreen::flipFinished()
+{
+}
+
+void QEglFSKmsScreen::restoreMode()
+{
+    if (m_output.mode_set && m_output.saved_crtc) {
+        drmModeSetCrtc(m_device->fd(),
+                       m_output.saved_crtc->crtc_id,
+                       m_output.saved_crtc->buffer_id,
+                       0, 0,
+                       &m_output.connector_id, 1,
+                       &m_output.saved_crtc->mode);
+
+        m_output.mode_set = false;
+    }
+}
+
+qreal QEglFSKmsScreen::refreshRate() const
+{
+    quint32 refresh = m_output.modes[m_output.mode].vrefresh;
+    return refresh > 0 ? refresh : 60;
+}
+
+QPlatformScreen::SubpixelAntialiasingType QEglFSKmsScreen::subpixelAntialiasingTypeHint() const
+{
+    switch (m_output.subpixel) {
+    default:
+    case DRM_MODE_SUBPIXEL_UNKNOWN:
+    case DRM_MODE_SUBPIXEL_NONE:
+        return Subpixel_None;
+    case DRM_MODE_SUBPIXEL_HORIZONTAL_RGB:
+        return Subpixel_RGB;
+    case DRM_MODE_SUBPIXEL_HORIZONTAL_BGR:
+        return Subpixel_BGR;
+    case DRM_MODE_SUBPIXEL_VERTICAL_RGB:
+        return Subpixel_VRGB;
+    case DRM_MODE_SUBPIXEL_VERTICAL_BGR:
+        return Subpixel_VBGR;
+    }
+}
+
+QPlatformScreen::PowerState QEglFSKmsScreen::powerState() const
+{
+    return m_powerState;
+}
+
+void QEglFSKmsScreen::setPowerState(QPlatformScreen::PowerState state)
+{
+    if (!m_output.dpms_prop)
+        return;
+
+    drmModeConnectorSetProperty(m_device->fd(), m_output.connector_id,
+                                m_output.dpms_prop->prop_id, (int)state);
+    m_powerState = state;
+}
+
+QT_END_NAMESPACE