Use the new udev based framework for detecting graphics cards.

Get rid of hard coded device node and support any number of graphics
cards.

Change-Id: I50f07fb1e6ea321a4ae751db8fb49ab439dce51e
Reviewed-by: Andy Nichols <andy.nichols@nokia.com>

src/plugins/platforms/kms/kms.pro

@@ -21,7 +21,8 @@ SOURCES =   main.cpp \
             qkmsbackingstore.cpp \
             qkmsnativeinterface.cpp \
             qkmsudevlistener.cpp \
-            qkmsudevhandler.cpp
+            qkmsudevhandler.cpp \
+            qkmsudevdrmhandler.cpp
 HEADERS =   qkmsintegration.h \
             qkmsscreen.h \
             qkmscontext.h \
@@ -32,7 +33,8 @@ HEADERS =   qkmsintegration.h \
             qkmsbackingstore.h \
             qkmsnativeinterface.h \
             qkmsudevlistener.h \
-            qkmsudevhandler.h
+            qkmsudevhandler.h \
+            qkmsudevdrmhandler.h
 
 target.path += $$[QT_INSTALL_PLUGINS]/platforms
 INSTALLS += target

src/plugins/platforms/kms/qkmsintegration.cpp

@@ -46,6 +46,8 @@
 #include "qkmsbackingstore.h"
 #include "qkmscontext.h"
 #include "qkmsnativeinterface.h"
+#include "qkmsudevlistener.h"
+#include "qkmsudevdrmhandler.h"
 
 #include <QtPlatformSupport/private/qgenericunixprintersupport_p.h>
 #include <QtPlatformSupport/private/qgenericunixeventdispatcher_p.h>
@@ -60,14 +62,13 @@ QKmsIntegration::QKmsIntegration()
     : QPlatformIntegration(),
       m_fontDatabase(new QGenericUnixFontDatabase()),
       m_eventDispatcher(createUnixEventDispatcher()),
-      m_nativeInterface(new QKmsNativeInterface)
+      m_nativeInterface(new QKmsNativeInterface),
+      m_udevListener(new QKmsUdevListener)
 {
     QGuiApplicationPrivate::instance()->setEventDispatcher(m_eventDispatcher);
     setenv("EGL_PLATFORM", "drm",1);
-    QStringList drmDevices = findDrmDevices();
-    foreach (QString path, drmDevices) {
-        m_devices.append(new QKmsDevice(path, this));
-    }
+    m_drmHandler = new QKmsUdevDRMHandler(this);
+    m_udevListener->addHandler(m_drmHandler);
 }
 
 QKmsIntegration::~QKmsIntegration()
@@ -79,6 +80,14 @@ QKmsIntegration::~QKmsIntegration()
         delete screen;
     }
     delete m_fontDatabase;
+    delete m_udevListener;
+}
+
+QObject *QKmsIntegration::createDevice(const char *path)
+{
+    QKmsDevice *device = new QKmsDevice(path, this);
+    m_devices.append(device);
+    return device;
 }
 
 bool QKmsIntegration::hasCapability(QPlatformIntegration::Capability cap) const
@@ -112,14 +121,6 @@ QPlatformFontDatabase *QKmsIntegration::fontDatabase() const
     return m_fontDatabase;
 }
 
-QStringList QKmsIntegration::findDrmDevices()
-{
-    //Return a list addresses of DRM supported devices
-    //Hardcoded now, but could use udev to return a list
-    //of multiple devices.
-    return QStringList(QString::fromLatin1("/dev/dri/card0"));
-}
-
 void QKmsIntegration::addScreen(QKmsScreen *screen)
 {
     m_screens.append(screen);

src/plugins/platforms/kms/qkmsintegration.h

@@ -49,6 +49,8 @@ QT_BEGIN_NAMESPACE
 
 class QKmsScreen;
 class QKmsDevice;
+class QKmsUdevListener;
+class QKmsUdevDRMHandler;
 
 class QKmsIntegration : public QPlatformIntegration
 {
@@ -65,10 +67,11 @@ public:
     QPlatformFontDatabase *fontDatabase() const;
     QAbstractEventDispatcher *guiThreadEventDispatcher() const;
 
-    void addScreen(QKmsScreen *screen);
-
     QPlatformNativeInterface *nativeInterface() const;
 
+    void addScreen(QKmsScreen *screen);
+    QObject *createDevice(const char *);
+
 private:
     QStringList findDrmDevices();
 
@@ -77,6 +80,8 @@ private:
     QPlatformFontDatabase *m_fontDatabase;
     QAbstractEventDispatcher *m_eventDispatcher;
     QPlatformNativeInterface *m_nativeInterface;
+    QKmsUdevListener *m_udevListener;
+    QKmsUdevDRMHandler *m_drmHandler;
 };
 
 QT_END_NAMESPACE

src/plugins/platforms/kms/qkmsudevdrmhandler.cpp

@@ -0,0 +1,66 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtCore/QRegExp>
+
+#include <qkmsintegration.h>
+#include <qkmsudevdrmhandler.h>
+
+QT_BEGIN_NAMESPACE
+
+QKmsUdevDRMHandler::QKmsUdevDRMHandler(QKmsIntegration *integration)
+    : m_integration(integration)
+{
+}
+
+QObject *QKmsUdevDRMHandler::create(struct udev_device *device)
+{
+    if (strcmp(udev_device_get_subsystem(device), "drm"))
+        return 0;
+
+    QRegExp regexp("^card\\d+$");
+    if (!regexp.exactMatch(udev_device_get_sysname(device)))
+        return 0;
+
+    return m_integration->createDevice(udev_device_get_devnode(device));
+}
+
+QT_END_NAMESPACE

src/plugins/platforms/kms/qkmsudevdrmhandler.h

@@ -0,0 +1,66 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QKMSUDEVDRMHANDLER_H
+#define QKMSUDEVDRMHANDLER_H
+
+#include <QObject>
+
+#include <qkmsudevhandler.h>
+
+QT_BEGIN_NAMESPACE
+
+class QKmsIntegration;
+
+class QKmsUdevDRMHandler : public QKmsUdevHandler
+{
+public:
+    QKmsUdevDRMHandler(QKmsIntegration *integration);
+
+    QObject *create(struct udev_device *device);
+
+private:
+    QKmsIntegration *m_integration;
+};
+
+QT_END_NAMESPACE
+
+#endif // QKMSUDEVDRMHANDLER_H