--- zzzz-none-000/linux-2.6.19.2/drivers/serial/serial_core.c	2007-01-10 19:10:37.000000000 +0000
+++ davinci-8020-5504/linux-2.6.19.2/drivers/serial/serial_core.c	2007-04-12 15:55:07.000000000 +0000
@@ -468,16 +468,22 @@
 	spin_unlock_irqrestore(&port->lock, flags);
 }
 
+#if defined(CONFIG_DAVINCI_DRM_KUNDENVERSION)
+#include <asm/irq.h>
+#endif
 static void uart_put_char(struct tty_struct *tty, unsigned char ch)
 {
 	struct uart_state *state = tty->driver_data;
 
-	__uart_put_char(state->port, &state->info->xmit, ch);
+#if defined(CONFIG_DAVINCI_DRM_KUNDENVERSION)   /*--- keine Ausgaben auf der seriellen ---*/
+    if (state->port->irq != IRQ_UARTINT0) 
+#endif
+        __uart_put_char(state->port, &state->info->xmit, ch);
 }
 
 static void uart_flush_chars(struct tty_struct *tty)
 {
-	uart_start(tty);
+        uart_start(tty);
 }
 
 static int
@@ -501,6 +507,13 @@
 	port = state->port;
 	circ = &state->info->xmit;
 
+#if defined(CONFIG_DAVINCI_DRM_KUNDENVERSION)   /*--- keine Ausgaben auf der seriellen ---*/
+    if (port->irq == IRQ_UARTINT0) {
+        circ->head = circ->tail;
+        return count;
+    }
+#endif
+
 	if (!circ->buf)
 		return 0;
 
@@ -2112,8 +2125,9 @@
 		 * Power down all ports by default, except the
 		 * console if we have one.
 		 */
-		if (!uart_console(port))
+		if (!uart_console(port)) {
 			uart_change_pm(state, 3);
+        }
 	}
 }