davinci decoder: Open Framebuffer by name (dm_vid0_fb)

Signed-off-by: Jean-Paul Saman <jean-paul.saman@m2x.nl>

modules/codec/davinci/viddec.c

@@ -79,6 +79,35 @@ struct decoder_sys_t
 
 };
 
+static int OpenFB( const char *psz_name )
+{
+    int i_fd = -1;
+    int i_tries = 0; /* begin with /dev/fb0 */
+    char *psz_device;
+    struct fb_fix_screeninfo info;
+
+    do {
+        if( asprintf( &psz_device, "/dev/fb%d", i_tries++ ) == -1 )
+            return -1;
+        i_fd = open( psz_device, O_RDWR);
+        free( psz_device );
+
+        if( i_fd == -1 )
+            return -1; /* check errno */
+
+        if( ioctl( i_fd, FBIOGET_FSCREENINFO, &info ) == -1 )
+        {
+            close( i_fd );
+            continue;
+        }
+
+        if( !strcmp( info.id, psz_name ) )
+            return i_fd;
+
+        close( i_fd );
+    } while(1);
+}
+
 /*****************************************************************************
  * OpenDecoder: probe the decoder and return score
  *****************************************************************************/
@@ -192,7 +221,7 @@ int OpenVideoDecoder( vlc_object_t *p_this )
 
 #ifdef DAVINCI_HACK
     /* Open framebuffer */
-    if( ( p_sys->i_fd_fb = open( "/dev/fb1", O_RDWR ) ) == -1 )
+    if( ( p_sys->i_fd_fb = OpenFB( "dm_vid0_fb" ) ) == -1 )
     {
         msg_Err( p_dec, "Failed to open framebuffer (%m)" );
         goto error;