Only in rockbox-modified/firmware: drivers
diff --strip-trailing-cr -u -r rockbox-original/firmware/target/arm/pcm-pp.c rockbox-modified/firmware/target/arm/pcm-pp.c
--- rockbox-original/firmware/target/arm/pcm-pp.c	2007-04-17 20:52:58.000000000 +0300
+++ rockbox-modified/firmware/target/arm/pcm-pp.c	2007-04-17 21:16:38.000000000 +0300
@@ -242,6 +242,8 @@
         IISFIFO_WR = (*(p++))<<16;
         p_size-=4;
     }
+
+    pcm_paused = false;
 }
 
 /* Stops the DMA transfer and interrupt */
@@ -271,6 +273,8 @@
 
 void pcm_play_pause_pause(void)
 {
+    pcm_paused = true;
+
 #if CONFIG_CPU == PP5020 || CONFIG_CPU == PP5024
     /* Disable the interrupt */
     IISCONFIG &= ~0x2;
@@ -316,6 +320,8 @@
         IISFIFO_WR = (*(p++))<<16;
         p_size-=4;
     }
+
+    pcm_paused = false;
 }
 
 void pcm_set_frequency(unsigned int frequency)
diff --strip-trailing-cr -u -r rockbox-original/firmware/target/arm/sandisk/sansa-e200/lcd-e200.c rockbox-modified/firmware/target/arm/sandisk/sansa-e200/lcd-e200.c
--- rockbox-original/firmware/target/arm/sandisk/sansa-e200/lcd-e200.c	2007-04-17 20:53:06.000000000 +0300
+++ rockbox-modified/firmware/target/arm/sandisk/sansa-e200/lcd-e200.c	2007-04-17 20:55:18.000000000 +0300
@@ -24,6 +24,7 @@
 #include "lcd.h"
 #include "system.h"
 #include <string.h>
+#include "pcm_playback.h"
 #include "backlight-target.h"
 
 #define LCD_DATA_IN_GPIO GPIOB_INPUT_VAL
@@ -278,20 +279,14 @@
 
     if(__backlight_is_on())
     {
-        /* Turn off DMA and wait for the transfer to complete */
-        /* TODO: Work out the proper delay */
-        LCD_REG_6 &= ~1;
-        udelay(1000);
-
         /* Copy the Rockbox framebuffer to the second framebuffer */
         /* TODO: Move the second framebuffer into uncached SDRAM */
         memcpy(((char*)&lcd_driver_framebuffer)+(y * sizeof(fb_data) * LCD_WIDTH),
                ((char *)&lcd_framebuffer)+(y * sizeof(fb_data) * LCD_WIDTH),
                ((height * sizeof(fb_data) * LCD_WIDTH)));
-        flush_icache();
 
-        /* Restart DMA */
-        LCD_REG_6 |= 1;
+        if((pcm_is_playing() == false) || (pcm_is_paused() == true))
+            flush_icache();
     }
 }
 
@@ -299,19 +294,12 @@
 {
     if(__backlight_is_on())
     {
-        /* TODO: It may be faster to swap the addresses of lcd_driver_framebuffer
-         * and lcd_framebuffer */
-        /* Turn off DMA and wait for the transfer to complete */
-        LCD_REG_6 &= ~1;
-        udelay(1000);
-
         /* Copy the Rockbox framebuffer to the second framebuffer */
         memcpy(lcd_driver_framebuffer, lcd_framebuffer,
                sizeof(fb_data) * LCD_WIDTH * LCD_HEIGHT);
-        flush_icache();
 
-        /* Restart DMA */
-        LCD_REG_6 |= 1;
+        if((pcm_is_playing() == false) || (pcm_is_paused() == true))
+            flush_icache();
     }
 }