Index: firmware/target/arm/tms320dm320/sansa-connect/lcd-sansaconnect.c
===================================================================
--- firmware/target/arm/tms320dm320/sansa-connect/lcd-sansaconnect.c	(revision 31323)
+++ firmware/target/arm/tms320dm320/sansa-connect/lcd-sansaconnect.c	(working copy)
@@ -30,6 +30,8 @@
 #include "lcd-target.h"
 #include "avr-sansaconnect.h"
 
+#define LCD_USE_DMA
+
 /* Copies a rectangle from one framebuffer to another. Can be used in
    single transfer mode with width = num pixels, and height = 1 which
    allows a full-width rectangle to be copied more efficiently. */
@@ -161,13 +163,100 @@
     avr_hid_lcm_wake();
 }
 
+#ifdef LCD_USE_DMA
+static void dma_copy_buffer_rect(int x, int y, int width, int height)
+{
+    char *dst, *src;
+
+    /* Image buffer A is 4KW, every pixel is one Word */
+    /* lines is maximum number of lines we can transfer in single run */
+    int lines = 4096/width;
+    if (lines > height)
+        lines = height;
+
+    /* Set source and destination addresses */
+    dst = (char*)(FRAME + LCD_WIDTH*y + x);
+    src = (char*)(&lcd_framebuffer[y][x]);
+        
+    /* Flush cache to memory */
+    clean_dcache();
+
+    /* Addresses are relative to start of SDRAM */
+    src -= CONFIG_SDRAM_START;
+    dst -= CONFIG_SDRAM_START;
+    
+    /* Enable Image Buffer clock */
+    bitset16(&IO_CLK_MOD1, CLK_MOD1_IMGBUF);
+
+    /* Use Image Buffer A for DMA */
+    COP_BUF_MUX0 = (COP_BUF_MUX0 & 0xFFF0) | 0x0003;
+
+    /* Setup buffer offsets and transfer width/height */
+    COP_BUF_LOFST = width;
+    COP_DMA_XNUM  = width;
+    COP_DMA_YNUM  = lines;
+
+    /* DMA: No byte SWAP, no transformation, data bus shift down 0 bit */
+    COP_IMG_MODE &= 0xC0;
+
+    /* Set the start address of buffer */
+    COP_BUF_ADDR = 0x0000;
+    
+    /* Setup SDRAM stride */
+    COP_SDEM_LOFST = LCD_WIDTH;
+
+    do {
+        int addr;
+
+        addr = (int)src;
+        addr >>= 1; /* Addresses are in 16-bit words */
+        
+        /* Setup the registers to initiate the read from SDRAM */
+        COP_SDEM_ADDRH = addr >> 16;
+        COP_SDEM_ADDRL = addr & 0xFFFF;
+        
+        /* Set direction and start */
+        COP_DMA_CTRL = 0x0001;
+        COP_DMA_CTRL |= 0x0002;
+
+        /* Wait for read to finish */
+        while (COP_DMA_CTRL & 0x02) {};
+        
+        addr = (int)dst;
+        addr >>= 1;
+        
+        COP_SDEM_ADDRH = addr >> 16;
+        COP_SDEM_ADDRL = addr & 0xFFFF;
+        
+        /* Set direction and start transfer */
+        COP_DMA_CTRL = 0x0000;
+        COP_DMA_CTRL |= 0x0002;
+        
+        /* Wait for the transfer to complete */
+        while (COP_DMA_CTRL & 0x02) {};
+
+        /* Decrease height, update pointers */
+        src += (LCD_WIDTH << 1)*lines;
+        dst += (LCD_WIDTH << 1)*lines;
+
+        height -= lines;
+        if (height < lines)
+        {
+            lines = height;
+            COP_DMA_YNUM = height;
+        }
+    } while (height > 0);
+
+    /* Disable Image Buffer clock */
+    bitclr16(&IO_CLK_MOD1, CLK_MOD1_IMGBUF);
+}
+#endif
+
 /* Update a fraction of the display. */
 void lcd_update_rect(int x, int y, int width, int height)
         __attribute__ ((section(".icode")));
 void lcd_update_rect(int x, int y, int width, int height)
 {
-    register fb_data *dst, *src;
-
     if (!lcd_on)
         return;
 
@@ -184,6 +273,11 @@
     if (y < 0)
         height += y, y = 0; /* Clip top */
 
+#ifdef LCD_USE_DMA
+    dma_copy_buffer_rect(x, y, width, height);
+#else
+    register fb_data *dst, *src;
+
     dst = FRAME + LCD_WIDTH*y + x;
     src = &lcd_framebuffer[y][x];
 
@@ -198,6 +292,7 @@
         /* Full width - copy as one line */
         lcd_copy_buffer_rect(dst, src, LCD_WIDTH*height, 1);
     }
+#endif
 }
 
 /* Update the display.