diff -ur /tmp/linux-2.6.15/drivers/video/aty/ati_ids.h ./aty/ati_ids.h
--- /tmp/linux-2.6.15/drivers/video/aty/ati_ids.h	2006-01-03 14:30:15.000000000 -0500
+++ ./aty/ati_ids.h	2006-01-03 15:12:01.000000000 -0500
@@ -185,6 +185,8 @@
 #define PCI_CHIP_R423_UQ                0x5551
 #define PCI_CHIP_R423_UR                0x5552
 #define PCI_CHIP_R423_UT                0x5554
+#define PCI_CHIP_RV410_5652             0x5652
+#define PCI_CHIP_RV410_VS               0x5653
 #define PCI_CHIP_MACH64VT		0x5654
 #define PCI_CHIP_MACH64VU		0x5655
 #define PCI_CHIP_MACH64VV		0x5656
diff -ur /tmp/linux-2.6.15/drivers/video/aty/radeon_base.c ./aty/radeon_base.c
--- /tmp/linux-2.6.15/drivers/video/aty/radeon_base.c	2006-01-03 14:30:15.000000000 -0500
+++ ./aty/radeon_base.c	2006-01-03 15:13:48.000000000 -0500
@@ -214,6 +214,8 @@
 	CHIP_DEF(PCI_CHIP_R420_JL,	R420,	CHIP_HAS_CRTC2),
 	CHIP_DEF(PCI_CHIP_R420_JM,	R420,	CHIP_HAS_CRTC2),
 	CHIP_DEF(PCI_CHIP_R420_JN,	R420,	CHIP_HAS_CRTC2 | CHIP_IS_MOBILITY),
+	CHIP_DEF(PCI_CHIP_RV410_5652,	R420,	CHIP_HAS_CRTC2 | CHIP_IS_MOBILITY),
+	CHIP_DEF(PCI_CHIP_RV410_VS,	R420,	CHIP_HAS_CRTC2 | CHIP_IS_MOBILITY),
 	CHIP_DEF(PCI_CHIP_R420_JP,	R420,	CHIP_HAS_CRTC2),
 	CHIP_DEF(PCI_CHIP_R423_UH,	R420,	CHIP_HAS_CRTC2),
 	CHIP_DEF(PCI_CHIP_R423_UI,	R420,	CHIP_HAS_CRTC2),
@@ -342,7 +344,7 @@
 	 * to phase out Open Firmware images.
 	 *
 	 * Currently, we only look at the first PCI data, we could iteratre and deal with
-	 * them all, and we should use fb_bios_start relative to start of image and not
+	 * them all, and we should use fp_bios_start relative to start of image and not
 	 * relative start of ROM, but so far, I never found a dual-image ATI card
 	 *
 	 * typedef struct {
@@ -655,8 +657,6 @@
 		rinfo->pll.ref_clk = 2700;
 		break;
 	}
-	rinfo->pll.ref_div = INPLL(PPLL_REF_DIV) & PPLL_REF_DIV_MASK;
-
 
 #ifdef CONFIG_PPC_OF
 	/*
@@ -673,14 +673,31 @@
 	 * and if yes, retreive them
 	 */
 	if (!force_measure_pll && rinfo->bios_seg) {
-		u16 pll_info_block = BIOS_IN16(rinfo->fp_bios_start + 0x30);
+		u16 pll_info_block;
+		if (rinfo->is_atom_bios) {
+			pll_info_block = BIOS_IN16(rinfo->atom_data_start + 12);
+
+			rinfo->pll.sclk = BIOS_IN32(pll_info_block + 8);
+			rinfo->pll.mclk = BIOS_IN32(pll_info_block + 12);
+			rinfo->pll.ref_clk = BIOS_IN16(pll_info_block + 82);
+			rinfo->pll.ref_div = 0; /* Have to get it elsewhere */
+			rinfo->pll.ppll_min = BIOS_IN16(pll_info_block + 78);
+			rinfo->pll.ppll_max = BIOS_IN32(pll_info_block + 32);
+
+			if (rinfo->pll.sclk == 0)  rinfo->pll.sclk = 20000;
+			if (rinfo->pll.mclk == 0)  rinfo->pll.mclk = 20000;
 
-		rinfo->pll.sclk		= BIOS_IN16(pll_info_block + 0x08);
-		rinfo->pll.mclk		= BIOS_IN16(pll_info_block + 0x0a);
-		rinfo->pll.ref_clk	= BIOS_IN16(pll_info_block + 0x0e);
-		rinfo->pll.ref_div	= BIOS_IN16(pll_info_block + 0x10);
-		rinfo->pll.ppll_min	= BIOS_IN32(pll_info_block + 0x12);
-		rinfo->pll.ppll_max	= BIOS_IN32(pll_info_block + 0x16);
+		} else {
+			pll_info_block = BIOS_IN16(rinfo->fp_bios_start + 0x30);
+			
+			rinfo->pll.sclk		= BIOS_IN16(pll_info_block + 0x08);
+			rinfo->pll.mclk		= BIOS_IN16(pll_info_block + 0x0a);
+			rinfo->pll.ref_clk	= BIOS_IN16(pll_info_block + 0x0e);
+			rinfo->pll.ref_div	= BIOS_IN16(pll_info_block + 0x10);
+			rinfo->pll.ppll_min	= BIOS_IN32(pll_info_block + 0x12);
+			rinfo->pll.ppll_max	= BIOS_IN32(pll_info_block + 0x16);
+			
+		}
 
 		printk(KERN_INFO "radeonfb: Retreived PLL infos from BIOS\n");
 		goto found;
@@ -701,6 +718,22 @@
        	printk(KERN_INFO "radeonfb: Used default PLL infos\n");
 
 found:
+
+	/* Check and fix-up the PLL divisor if necessary */
+	if (rinfo->pll.ref_div < 2) {
+		int tmp = INPLL(PPLL_REF_DIV);
+		if (rinfo->family == CHIP_FAMILY_RS300) {
+			rinfo->pll.ref_div = (tmp & R300_PPLL_REF_DIV_ACC_MASK) >> R300_PPLL_REF_DIV_ACC_SHIFT;
+		} else {
+			rinfo->pll.ref_div = tmp & PPLL_REF_DIV_MASK;
+		}
+		
+		/* Sane default */
+		if (rinfo->pll.ref_div < 2) {		
+			rinfo->pll.ref_div = 12;
+		}
+	}		
+
 	/*
 	 * Some methods fail to retreive SCLK and MCLK values, we apply default
 	 * settings in this case (200Mhz). If that really happne often, we could
@@ -2412,6 +2445,7 @@
 	 * We probably need to make sure this is the primary display,
 	 * but that is difficult without some arch support.
 	 */
+
 #ifdef CONFIG_X86
 	if (rinfo->bios_seg == NULL)
 		radeon_find_mem_vbios(rinfo);
@@ -2423,6 +2457,28 @@
 	if (rinfo->bios_seg == NULL && rinfo->is_mobility)
 		radeon_map_ROM(rinfo, pdev);
 
+	/* Check BIOS Type */
+	{
+	  int tmp = rinfo->fp_bios_start + 4;
+	  if ((BIOS_IN8(tmp) == 'A' &&
+	       BIOS_IN8(tmp+1) == 'T' &&
+	       BIOS_IN8(tmp+2) == 'O' &&
+	       BIOS_IN8(tmp+3) == 'M') ||
+	      (BIOS_IN8(tmp) == 'M' &&
+	       BIOS_IN8(tmp+1) == 'O' &&
+	       BIOS_IN8(tmp+2) == 'T' &&
+	       BIOS_IN8(tmp+3) == 'A')) {
+		  rinfo->is_atom_bios = 1;
+	  } else {
+		  rinfo->is_atom_bios = 0;
+	  }
+	}
+	
+	if (rinfo->is_atom_bios) {
+		rinfo->atom_data_start = BIOS_IN16(rinfo->fp_bios_start + 32);
+		printk("ATOM BIOS detected\n");
+	}
+
 	/* Get informations about the board's PLL */
 	radeon_get_pllinfo(rinfo);
 
diff -ur /tmp/linux-2.6.15/drivers/video/aty/radeon_monitor.c ./aty/radeon_monitor.c
--- /tmp/linux-2.6.15/drivers/video/aty/radeon_monitor.c	2005-10-27 20:02:08.000000000 -0400
+++ ./aty/radeon_monitor.c	2006-01-03 12:15:55.000000000 -0500
@@ -169,76 +169,117 @@
 	if (!rinfo->bios_seg)
 		return 0;
 
-	if (!(tmp = BIOS_IN16(rinfo->fp_bios_start + 0x40))) {
-		printk(KERN_ERR "radeonfb: Failed to detect DFP panel info using BIOS\n");
-		rinfo->panel_info.pwr_delay = 200;
-		return 0;
-	}
 
-	for(i=0; i<24; i++)
-		stmp[i] = BIOS_IN8(tmp+i+1);
-	stmp[24] = 0;
-	printk("radeonfb: panel ID string: %s\n", stmp);
-	rinfo->panel_info.xres = BIOS_IN16(tmp + 25);
-	rinfo->panel_info.yres = BIOS_IN16(tmp + 27);
-	printk("radeonfb: detected LVDS panel size from BIOS: %dx%d\n",
-		rinfo->panel_info.xres, rinfo->panel_info.yres);
-
-	rinfo->panel_info.pwr_delay = BIOS_IN16(tmp + 44);
-	RTRACE("BIOS provided panel power delay: %d\n", rinfo->panel_info.pwr_delay);
-	if (rinfo->panel_info.pwr_delay > 2000 || rinfo->panel_info.pwr_delay <= 0)
-		rinfo->panel_info.pwr_delay = 2000;
+	if (rinfo->is_atom_bios) {
+		tmp = BIOS_IN16(rinfo->atom_data_start + 16);
+		if (!tmp) {
+			printk(KERN_ERR "radeonfb: Failed to detect DFP panel info using BIOS\n");
+			rinfo->panel_info.pwr_delay = 200;
+			return 0;
+		}
 
-	/*
-	 * Some panels only work properly with some divider combinations
-	 */
-	rinfo->panel_info.ref_divider = BIOS_IN16(tmp + 46);
-	rinfo->panel_info.post_divider = BIOS_IN8(tmp + 48);
-	rinfo->panel_info.fbk_divider = BIOS_IN16(tmp + 49);
-	if (rinfo->panel_info.ref_divider != 0 &&
-	    rinfo->panel_info.fbk_divider > 3) {
-		rinfo->panel_info.use_bios_dividers = 1;
-		printk(KERN_INFO "radeondb: BIOS provided dividers will be used\n");
-		RTRACE("ref_divider = %x\n", rinfo->panel_info.ref_divider);
-		RTRACE("post_divider = %x\n", rinfo->panel_info.post_divider);
-		RTRACE("fbk_divider = %x\n", rinfo->panel_info.fbk_divider);
-	}
-	RTRACE("Scanning BIOS table ...\n");
-	for(i=0; i<32; i++) {
-		tmp0 = BIOS_IN16(tmp+64+i*2);
-		if (tmp0 == 0)
-			break;
-		RTRACE(" %d x %d\n", BIOS_IN16(tmp0), BIOS_IN16(tmp0+2));
-		if ((BIOS_IN16(tmp0) == rinfo->panel_info.xres) &&
-		    (BIOS_IN16(tmp0+2) == rinfo->panel_info.yres)) {
-			rinfo->panel_info.hblank = (BIOS_IN16(tmp0+17) - BIOS_IN16(tmp0+19)) * 8;
-			rinfo->panel_info.hOver_plus = ((BIOS_IN16(tmp0+21) -
-							 BIOS_IN16(tmp0+19) -1) * 8) & 0x7fff;
-			rinfo->panel_info.hSync_width = BIOS_IN8(tmp0+23) * 8;
-			rinfo->panel_info.vblank = BIOS_IN16(tmp0+24) - BIOS_IN16(tmp0+26);
-			rinfo->panel_info.vOver_plus = (BIOS_IN16(tmp0+28) & 0x7ff) - BIOS_IN16(tmp0+26);
-			rinfo->panel_info.vSync_width = (BIOS_IN16(tmp0+28) & 0xf800) >> 11;
-			rinfo->panel_info.clock = BIOS_IN16(tmp0+9);
-			/* Assume high active syncs for now until ATI tells me more... maybe we
-			 * can probe register values here ?
-			 */
-			rinfo->panel_info.hAct_high = 1;
-			rinfo->panel_info.vAct_high = 1;
-			/* Mark panel infos valid */
-			rinfo->panel_info.valid = 1;
-
-			RTRACE("Found panel in BIOS table:\n");
-			RTRACE("  hblank: %d\n", rinfo->panel_info.hblank);
-			RTRACE("  hOver_plus: %d\n", rinfo->panel_info.hOver_plus);
-			RTRACE("  hSync_width: %d\n", rinfo->panel_info.hSync_width);
-			RTRACE("  vblank: %d\n", rinfo->panel_info.vblank);
-			RTRACE("  vOver_plus: %d\n", rinfo->panel_info.vOver_plus);
-			RTRACE("  vSync_width: %d\n", rinfo->panel_info.vSync_width);
-			RTRACE("  clock: %d\n", rinfo->panel_info.clock);
+		rinfo->panel_info.xres = BIOS_IN16(tmp+6);
+		rinfo->panel_info.yres = BIOS_IN16(tmp+10);
+		printk("radeonfb: detected LVDS panel size from BIOS: %dx%d\n",
+		       rinfo->panel_info.xres, rinfo->panel_info.yres);
+		rinfo->panel_info.pwr_delay = BIOS_IN16(tmp+40);
+		RTRACE("BIOS provided panel power delay: %d\n", rinfo->panel_info.pwr_delay);
+		if (rinfo->panel_info.pwr_delay > 2000 || rinfo->panel_info.pwr_delay <= 0)
+			rinfo->panel_info.pwr_delay = 2000;
+		
+		/* No special divider combinations? */
+		       
+		rinfo->panel_info.hblank = BIOS_IN16(tmp+8);
+		rinfo->panel_info.hOver_plus = BIOS_IN16(tmp+14);
+		rinfo->panel_info.hSync_width = BIOS_IN16(tmp+16);
+		rinfo->panel_info.vblank = BIOS_IN16(tmp+12);
+		rinfo->panel_info.vOver_plus = BIOS_IN16(tmp+18);
+		rinfo->panel_info.vSync_width = BIOS_IN16(tmp+20);
+		rinfo->panel_info.clock = BIOS_IN16(tmp+4);
+
+		/* Assume high active syncs for now until ATI tells me more... maybe we
+		 * can probe register values here ?
+		 */
+		rinfo->panel_info.hAct_high = 1;
+		rinfo->panel_info.vAct_high = 1;
+		/* Mark panel infos valid */
+		rinfo->panel_info.valid = 1;
+
+		return 1;
+	} else {
+		if (!(tmp = BIOS_IN16(rinfo->fp_bios_start + 0x40))) {
+			printk(KERN_ERR "radeonfb: Failed to detect DFP panel info using BIOS\n");
+			rinfo->panel_info.pwr_delay = 200;
+			return 0;
+		}
+		
+		for(i=0; i<24; i++)
+			stmp[i] = BIOS_IN8(tmp+i+1);
+		stmp[24] = 0;
+		printk("radeonfb: panel ID string: %s\n", stmp);
+		rinfo->panel_info.xres = BIOS_IN16(tmp + 25);
+		rinfo->panel_info.yres = BIOS_IN16(tmp + 27);
+		printk("radeonfb: detected LVDS panel size from BIOS: %dx%d\n",
+		       rinfo->panel_info.xres, rinfo->panel_info.yres);
+		
+		rinfo->panel_info.pwr_delay = BIOS_IN16(tmp + 44);
+		RTRACE("BIOS provided panel power delay: %d\n", rinfo->panel_info.pwr_delay);
+		if (rinfo->panel_info.pwr_delay > 2000 || rinfo->panel_info.pwr_delay <= 0)
+			rinfo->panel_info.pwr_delay = 2000;
+		
+		/*
+		 * Some panels only work properly with some divider combinations
+		 */
+		rinfo->panel_info.ref_divider = BIOS_IN16(tmp + 46);
+		rinfo->panel_info.post_divider = BIOS_IN8(tmp + 48);
+		rinfo->panel_info.fbk_divider = BIOS_IN16(tmp + 49);
+		if (rinfo->panel_info.ref_divider != 0 &&
+		    rinfo->panel_info.fbk_divider > 3) {
+			rinfo->panel_info.use_bios_dividers = 1;
+			printk(KERN_INFO "radeondb: BIOS provided dividers will be used\n");
+			RTRACE("ref_divider = %x\n", rinfo->panel_info.ref_divider);
+			RTRACE("post_divider = %x\n", rinfo->panel_info.post_divider);
+			RTRACE("fbk_divider = %x\n", rinfo->panel_info.fbk_divider);
+		}
+
+		RTRACE("Scanning BIOS table ...\n");
+		for(i=0; i<32; i++) {
+			tmp0 = BIOS_IN16(tmp+64+i*2);
+			if (tmp0 == 0)
+				break;
+			RTRACE(" %d x %d\n", BIOS_IN16(tmp0), BIOS_IN16(tmp0+2));
+			if ((BIOS_IN16(tmp0) == rinfo->panel_info.xres) &&
+			    (BIOS_IN16(tmp0+2) == rinfo->panel_info.yres)) {
+				rinfo->panel_info.hblank = (BIOS_IN16(tmp0+17) - BIOS_IN16(tmp0+19)) * 8;
+				rinfo->panel_info.hOver_plus = ((BIOS_IN16(tmp0+21) -
+								 BIOS_IN16(tmp0+19) -1) * 8) & 0x7fff;
+				rinfo->panel_info.hSync_width = BIOS_IN8(tmp0+23) * 8;
+				rinfo->panel_info.vblank = BIOS_IN16(tmp0+24) - BIOS_IN16(tmp0+26);
+				rinfo->panel_info.vOver_plus = (BIOS_IN16(tmp0+28) & 0x7ff) - BIOS_IN16(tmp0+26);
+				rinfo->panel_info.vSync_width = (BIOS_IN16(tmp0+28) & 0xf800) >> 11;
+				rinfo->panel_info.clock = BIOS_IN16(tmp0+9);
+				/* Assume high active syncs for now until ATI tells me more... maybe we
+				 * can probe register values here ?
+				 */
+				rinfo->panel_info.hAct_high = 1;
+				rinfo->panel_info.vAct_high = 1;
+				/* Mark panel infos valid */
+				rinfo->panel_info.valid = 1;
 				
-			return 1;
+				RTRACE("Found panel in BIOS table:\n");
+				RTRACE("  hblank: %d\n", rinfo->panel_info.hblank);
+				RTRACE("  hOver_plus: %d\n", rinfo->panel_info.hOver_plus);
+				RTRACE("  hSync_width: %d\n", rinfo->panel_info.hSync_width);
+				RTRACE("  vblank: %d\n", rinfo->panel_info.vblank);
+				RTRACE("  vOver_plus: %d\n", rinfo->panel_info.vOver_plus);
+				RTRACE("  vSync_width: %d\n", rinfo->panel_info.vSync_width);
+				RTRACE("  clock: %d\n", rinfo->panel_info.clock);
+				
+				return 1;
+			}
 		}
 	}
+
 	RTRACE("Didn't find panel in BIOS table !\n");
 
 	return 0;
@@ -261,29 +302,34 @@
 	if (!rinfo->bios_seg)
 		return;
 
-	offset = BIOS_IN16(rinfo->fp_bios_start + 0x50);
-	if (offset == 0) {
-		printk(KERN_WARNING "radeonfb: No connector info table detected\n");
-		return;
-	}
-
-	/* Don't do much more at this point but displaying the data if
-	 * DEBUG is enabled
-	 */
-	chips = BIOS_IN8(offset++) >> 4;
-	RTRACE("%d chips in connector info\n", chips);
-	for (i = 0; i < chips; i++) {
-		tmp = BIOS_IN8(offset++);
-		connectors = tmp & 0x0f;
-		RTRACE(" - chip %d has %d connectors\n", tmp >> 4, connectors);
-		for (conn = 0; ; conn++) {
-			tmp = BIOS_IN16(offset);
-			if (tmp == 0)
-				break;
-			offset += 2;
-			type = (tmp >> 12) & 0x0f;
-			RTRACE("  * connector %d of type %d (%s) : %04x\n",
-			       conn, type, __conn_type_table[type], tmp);
+	if (rinfo->is_atom_bios) {
+		printk(KERN_WARNING "XXXX Write ATOM BIOS connector parse\n");
+	} else {
+	  
+		offset = BIOS_IN16(rinfo->fp_bios_start + 0x50);
+		if (offset == 0) {
+			printk(KERN_WARNING "radeonfb: No connector info table detected\n");
+			return;
+		}
+		
+		/* Don't do much more at this point but displaying the data if
+		 * DEBUG is enabled
+		 */
+		chips = BIOS_IN8(offset++) >> 4;
+		RTRACE("%d chips in connector info\n", chips);
+		for (i = 0; i < chips; i++) {
+			tmp = BIOS_IN8(offset++);
+			connectors = tmp & 0x0f;
+			RTRACE(" - chip %d has %d connectors\n", tmp >> 4, connectors);
+			for (conn = 0; ; conn++) {
+				tmp = BIOS_IN16(offset);
+				if (tmp == 0)
+					break;
+				offset += 2;
+				type = (tmp >> 12) & 0x0f;
+				RTRACE("  * connector %d of type %d (%s) : %04x\n",
+				       conn, type, __conn_type_table[type], tmp);
+			}
 		}
 	}
 }
@@ -519,6 +565,8 @@
 		/*
 		 * Check for cards with reversed DACs or TMDS controllers using BIOS
 		 */
+		// XXXX What about atom_bios types?
+
 		if (rinfo->bios_seg &&
 		    (tmp = BIOS_IN16(rinfo->fp_bios_start + 0x50))) {
 			for (i = 1; i < 4; i++) {
diff -ur /tmp/linux-2.6.15/drivers/video/aty/radeonfb.h ./aty/radeonfb.h
--- /tmp/linux-2.6.15/drivers/video/aty/radeonfb.h	2006-01-03 14:30:15.000000000 -0500
+++ ./aty/radeonfb.h	2006-01-03 11:30:51.000000000 -0500
@@ -298,6 +298,9 @@
 	void __iomem		*bios_seg;
 	int			fp_bios_start;
 
+	int                     is_atom_bios;
+	int                     atom_data_start;
+
 	u32			pseudo_palette[17];
 	struct { u8 red, green, blue, pad; }
 				palette[256];