This commit provides support for any iPAQ handheld that runs a 2.6 kernel

and follows the backlight class in sysfs. This patch was originally done
by an unknown poster and maintained by Paul S. Thanks all who contributed.

1 files changed, 44 insertions, 57 deletions

diff --git a/libopie2/opiecore/device/odevice_ipaq.cpp b/libopie2/opiecore/device/odevice_ipaq.cpp
index 16ecc27..02b685a 100644
--- a/libopie2/opiecore/device/odevice_ipaq.cpp
+++ b/libopie2/opiecore/device/odevice_ipaq.cpp
@@ -399,41 +399,15 @@ bool iPAQ::setDisplayBrightness ( int bright )
 
-    QString cmdline;
-
-    switch ( model()) {
-    case Model_iPAQ_H191x:
-    case Model_iPAQ_H4xxx:
-        {
-            QDir sysClass( "/sys/class/backlight/pxafb/" );
-            sysClass.setFilter(QDir::Dirs);
-            int fd;
-            if ( sysClass.exists() ) {
-                QString sysClassPath = sysClass.absFilePath( "/sys/class/backlight/pxafb/power" );
-                fd = ::open( sysClassPath, O_WRONLY | O_NONBLOCK );
-                if ( fd ) {
-                    char buf[10];
-                    buf[0] = bright ? 0 : 4;
-                    buf[1] = '\0';
-                    res = ( ::write( fd, &buf[0], 2 ) == 0 );
-                    ::close( fd );
-                }
-                sysClassPath = sysClass.absFilePath( "/sys/class/backlight/pxafb/brightness" );
-                fd = ::open( sysClassPath, O_WRONLY | O_NONBLOCK );
-                if ( fd ) {
-                    char buf[100];
-                    int len = ::snprintf( &buf[0], sizeof buf, "%d", bright );
-                    res = ( ::write( fd, &buf[0], len ) == 0 );
-                    ::close( fd );
-                }
-            }
-        }
-        break; 
-        
-    case Model_iPAQ_HX4700:
-            cmdline = QString::fromLatin1( "echo %1 > /sys/class/backlight/w100fb/brightness" ).arg( bright );
-        // No Global::shellQuote as we gurantee it to be sane
-        res = ( ::system( QFile::encodeName(cmdline) ) == 0 );
-        break; 
-        
-
-    default:
+    QDir sysClass( "/sys/class/backlight/" );
+    sysClass.setFilter(QDir::Dirs);
+    if ( sysClass.exists() && sysClass.count() > 2 ) {
+        QString sysClassPath = sysClass.absFilePath( sysClass[2] + "/brightness" );
+        int fd = ::open( sysClassPath, O_WRONLY|O_NONBLOCK );
+        if ( fd ) {
+            char buf[100];
+            int val = bright * displayBrightnessResolution() / 255;
+            int len = ::snprintf( &buf[0], sizeof buf, "%d", val );
+            res = ( ::write( fd, &buf[0], len ) == 0 );
+            ::close( fd );
+        }
+    } else {
         if (( fd = ::open ( "/dev/touchscreen/0", O_WRONLY )) >= 0 ) {
@@ -447,2 +421,3 @@ bool iPAQ::setDisplayBrightness ( int bright )
     }
+
     return res;
@@ -452,2 +427,18 @@ int iPAQ::displayBrightnessResolution() const
 {
+    int res = 16;
+
+    QDir sysClass( "/sys/class/backlight/" );
+    sysClass.setFilter(QDir::Dirs);
+    if ( sysClass.exists() && sysClass.count() > 2 ) {
+        QString sysClassPath = sysClass.absFilePath( sysClass[2] + "/max_brightness" );
+        int fd = ::open( sysClassPath, O_RDONLY|O_NONBLOCK );
+        if ( fd ) {
+            char buf[100];
+            if ( ::read( fd, &buf[0], sizeof buf ) )
+                ::sscanf( &buf[0], "%d", &res );
+            ::close( fd );
+        }
+            return res;
+    }
+
     switch ( model()) {
@@ -480,23 +471,18 @@ bool iPAQ::setDisplayStatus ( bool on )
 
-    if ( model() == Model_iPAQ_H191x ) {
-        QDir sysClass( "/sys/class/lcd/pxafb/" );
-        sysClass.setFilter(QDir::Dirs);
-        if ( sysClass.exists() ) {
-            QString sysClassPath = sysClass.absFilePath( "/sys/class/lcd/pxafb/power" );
-            int fd = ::open( sysClassPath, O_WRONLY | O_NONBLOCK );
-            if ( fd ) {
-                char buf[10];
-                buf[0] = on ? 0 : 4;
-                buf[1] = '\0';
-                res = ( ::write( fd, &buf[0], 2 ) == 0 );
-                ::close( fd );
-            }
-        }
-        return res;
+    QDir sysClass( "/sys/class/lcd/" );
+    sysClass.setFilter(QDir::Dirs);
+    if ( sysClass.exists() && sysClass.count() > 2 ) {
+        QString sysClassPath = sysClass.absFilePath( sysClass[2] + "/power" );
+        int fd = ::open( sysClassPath, O_WRONLY|O_NONBLOCK );
+        if ( fd ) {
+            char buf[10];
+            buf[0] = on ? 0 : 4;
+            buf[1] = '\0';
+            res = ( ::write( fd, &buf[0], 2 ) == 0 );
+            ::close( fd );
+        }
     } else {
-        return OAbstractMobileDevice::setDisplayStatus(on);
+         res = OAbstractMobileDevice::setDisplayStatus(on);
     }
 
-    res = ( ::system( QFile::encodeName(cmdline) ) == 0 );
-
     return res;
@@ -508,2 +494,3 @@ bool iPAQ::hasLightSensor() const
         case Model_iPAQ_H191x:
+        case Model_iPAQ_H22xx:
         case Model_iPAQ_H4xxx: