Merge branch 'viafb-next' of git://github.com/schandinat/linux-2.6

* 'viafb-next' of git://github.com/schandinat/linux-2.6: (24 commits)
  viafb: Automatic OLPC XO-1.5 configuration
  viafb: remove unused CEA mode
  viafb: try to map less memory in case of failure
  viafb: use write combining for video ram
  viafb: add X server compatibility mode
  viafb: reduce OLPC refresh a bit
  viafb: fix OLPC XO 1.5 device connection
  viafb: fix OLPC DCON refresh rate
  viafb: delete clock and PLL initialization
  viafb: replace custom return values
  viafb: some small cleanup for global variables
  viafb: gather common good, old VGA initialization in one place
  viafb: add engine clock support
  viafb: add VIA slapping capability
  viafb: split clock and PLL code to an extra file
  viafb: add primary/secondary clock on/off switches
  viafb: add clock source selection and PLL power management support
  viafb: prepare for PLL separation
  viafb: call viafb_get_clk_value only in viafb_set_vclock
  viafb: remove unused max_hres/vres
  ...

19 files changed, 723 insertions, 706 deletions

diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index e6a8d8c..6d13967 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -1562,6 +1562,17 @@ config FB_VIA_DIRECT_PROCFS
 	  correct output device configuration.
 	  Its use is strongly discouraged.
 
+config FB_VIA_X_COMPATIBILITY
+	bool "X server compatibility"
+	depends on FB_VIA
+	default n
+	help
+	  This option reduces the functionality (power saving, ...) of the
+	  framebuffer to avoid negative impact on the OpenChrome X server.
+	  If you use any X server other than fbdev you should enable this
+	  otherwise it should be safe to disable it and allow using all
+	  features.
+
 endif
 
 config FB_NEOMAGIC
diff --git a/drivers/video/via/Makefile b/drivers/video/via/Makefile
index 96f01ee..5108136 100644
--- a/drivers/video/via/Makefile
+++ b/drivers/video/via/Makefile
@@ -6,4 +6,4 @@ obj-$(CONFIG_FB_VIA) += viafb.o
 
 viafb-y	:=viafbdev.o hw.o via_i2c.o dvi.o lcd.o ioctl.o accel.o \
 	via_utility.o vt1636.o global.o tblDPASetting.o viamode.o \
-	via-core.o via-gpio.o via_modesetting.o
+	via-core.o via-gpio.o via_modesetting.o via_clock.o
diff --git a/drivers/video/via/chip.h b/drivers/video/via/chip.h
index 29d7024..3ebf20c 100644
--- a/drivers/video/via/chip.h
+++ b/drivers/video/via/chip.h
@@ -137,17 +137,11 @@ struct chip_information {
 	struct lvds_chip_information lvds_chip_info2;
 };
 
-struct crt_setting_information {
-	int iga_path;
-};
-
 struct tmds_setting_information {
 	int iga_path;
 	int h_active;
 	int v_active;
 	int max_pixel_clock;
-	int max_hres;
-	int max_vres;
 };
 
 struct lvds_setting_information {
diff --git a/drivers/video/via/dvi.c b/drivers/video/via/dvi.c
index 41ca198..b1f3647 100644
--- a/drivers/video/via/dvi.c
+++ b/drivers/video/via/dvi.c
@@ -28,17 +28,11 @@ static int tmds_register_read_bytes(int index, u8 *buff, int buff_len);
 static void __devinit dvi_get_panel_size_from_DDCv1(
 	struct tmds_chip_information *tmds_chip,
 	struct tmds_setting_information *tmds_setting);
-static void __devinit dvi_get_panel_size_from_DDCv2(
-	struct tmds_chip_information *tmds_chip,
-	struct tmds_setting_information *tmds_setting);
 static int viafb_dvi_query_EDID(void);
 
-static int check_tmds_chip(int device_id_subaddr, int device_id)
+static inline bool check_tmds_chip(int device_id_subaddr, int device_id)
 {
-	if (tmds_register_read(device_id_subaddr) == device_id)
-		return OK;
-	else
-		return FAIL;
+	return tmds_register_read(device_id_subaddr) == device_id;
 }
 
 void __devinit viafb_init_dvi_size(struct tmds_chip_information *tmds_chip,
@@ -47,22 +41,13 @@ void __devinit viafb_init_dvi_size(struct tmds_chip_information *tmds_chip,
 	DEBUG_MSG(KERN_INFO "viafb_init_dvi_size()\n");
 
 	viafb_dvi_sense();
-	switch (viafb_dvi_query_EDID()) {
-	case 1:
+	if (viafb_dvi_query_EDID() == 1)
 		dvi_get_panel_size_from_DDCv1(tmds_chip, tmds_setting);
-		break;
-	case 2:
-		dvi_get_panel_size_from_DDCv2(tmds_chip, tmds_setting);
-		break;
-	default:
-		printk(KERN_WARNING "viafb_init_dvi_size: DVI panel size undetected!\n");
-		break;
-	}
 
 	return;
 }
 
-int __devinit viafb_tmds_trasmitter_identify(void)
+bool __devinit viafb_tmds_trasmitter_identify(void)
 {
 	unsigned char sr2a = 0, sr1e = 0, sr3e = 0;
 
@@ -101,7 +86,7 @@ int __devinit viafb_tmds_trasmitter_identify(void)
 	viaparinfo->chip_info->
 		tmds_chip_info.tmds_chip_slave_addr = VT1632_TMDS_I2C_ADDR;
 	viaparinfo->chip_info->tmds_chip_info.i2c_port = VIA_PORT_31;
-	if (check_tmds_chip(VT1632_DEVICE_ID_REG, VT1632_DEVICE_ID) != FAIL) {
+	if (check_tmds_chip(VT1632_DEVICE_ID_REG, VT1632_DEVICE_ID)) {
 		/*
 		 * Currently only support 12bits,dual edge,add 24bits mode later
 		 */
@@ -112,11 +97,10 @@ int __devinit viafb_tmds_trasmitter_identify(void)
 			  viaparinfo->chip_info->tmds_chip_info.tmds_chip_name);
 		DEBUG_MSG(KERN_INFO "\n %2d",
 			  viaparinfo->chip_info->tmds_chip_info.i2c_port);
-		return OK;
+		return true;
 	} else {
 		viaparinfo->chip_info->tmds_chip_info.i2c_port = VIA_PORT_2C;
-		if (check_tmds_chip(VT1632_DEVICE_ID_REG, VT1632_DEVICE_ID)
-		    != FAIL) {
+		if (check_tmds_chip(VT1632_DEVICE_ID_REG, VT1632_DEVICE_ID)) {
 			tmds_register_write(0x08, 0x3b);
 			DEBUG_MSG(KERN_INFO "\n VT1632 TMDS ! \n");
 			DEBUG_MSG(KERN_INFO "\n %2d",
@@ -125,7 +109,7 @@ int __devinit viafb_tmds_trasmitter_identify(void)
 			DEBUG_MSG(KERN_INFO "\n %2d",
 				  viaparinfo->chip_info->
 				  tmds_chip_info.i2c_port);
-			return OK;
+			return true;
 		}
 	}
 
@@ -135,7 +119,7 @@ int __devinit viafb_tmds_trasmitter_identify(void)
 	    ((viafb_display_hardware_layout == HW_LAYOUT_DVI_ONLY) ||
 	     (viafb_display_hardware_layout == HW_LAYOUT_LCD_DVI))) {
 		DEBUG_MSG(KERN_INFO "\n Integrated TMDS ! \n");
-		return OK;
+		return true;
 	}
 
 	switch (viaparinfo->chip_info->gfx_chip_name) {
@@ -159,7 +143,7 @@ int __devinit viafb_tmds_trasmitter_identify(void)
 		tmds_chip_info.tmds_chip_name = NON_TMDS_TRANSMITTER;
 	viaparinfo->chip_info->tmds_chip_info.
 		tmds_chip_slave_addr = VT1632_TMDS_I2C_ADDR;
-	return FAIL;
+	return false;
 }
 
 static void tmds_register_write(int index, u8 data)
@@ -306,12 +290,7 @@ static int viafb_dvi_query_EDID(void)
 		return EDID_VERSION_1;	/* Found EDID1 Table */
 	}
 
-	data0 = (u8) tmds_register_read(0x00);
-	viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr = restore;
-	if (data0 == 0x20)
-		return EDID_VERSION_2;	/* Found EDID2 Table */
-	else
-		return false;
+	return false;
 }
 
 /* Get Panel Size Using EDID1 Table */
@@ -319,50 +298,15 @@ static void __devinit dvi_get_panel_size_from_DDCv1(
 	struct tmds_chip_information *tmds_chip,
 	struct tmds_setting_information *tmds_setting)
 {
-	int i, max_h = 0, tmp, restore;
-	unsigned char rData;
+	int i, restore;
 	unsigned char EDID_DATA[18];
 
 	DEBUG_MSG(KERN_INFO "\n dvi_get_panel_size_from_DDCv1 \n");
 
 	restore = tmds_chip->tmds_chip_slave_addr;
 	tmds_chip->tmds_chip_slave_addr = 0xA0;
-
-	rData = tmds_register_read(0x23);
-	if (rData & 0x3C)
-		max_h = 640;
-	if (rData & 0xC0)
-		max_h = 720;
-	if (rData & 0x03)
-		max_h = 800;
-
-	rData = tmds_register_read(0x24);
-	if (rData & 0xC0)
-		max_h = 800;
-	if (rData & 0x1E)
-		max_h = 1024;
-	if (rData & 0x01)
-		max_h = 1280;
-
 	for (i = 0x25; i < 0x6D; i++) {
 		switch (i) {
-		case 0x26:
-		case 0x28:
-		case 0x2A:
-		case 0x2C:
-		case 0x2E:
-		case 0x30:
-		case 0x32:
-		case 0x34:
-			rData = tmds_register_read(i);
-			if (rData == 1)
-				break;
-			/* data = (data + 31) * 8 */
-			tmp = (rData + 31) << 3;
-			if (tmp > max_h)
-				max_h = tmp;
-			break;
-
 		case 0x36:
 		case 0x48:
 		case 0x5A:
@@ -383,91 +327,11 @@ static void __devinit dvi_get_panel_size_from_DDCv1(
 		}
 	}
 
-	tmds_setting->max_hres = max_h;
-	switch (max_h) {
-	case 640:
-		tmds_setting->max_vres = 480;
-		break;
-	case 800:
-		tmds_setting->max_vres = 600;
-		break;
-	case 1024:
-		tmds_setting->max_vres = 768;
-		break;
-	case 1280:
-		tmds_setting->max_vres = 1024;
-		break;
-	case 1400:
-		tmds_setting->max_vres = 1050;
-		break;
-	case 1440:
-		tmds_setting->max_vres = 1050;
-		break;
-	case 1600:
-		tmds_setting->max_vres = 1200;
-		break;
-	case 1920:
-		tmds_setting->max_vres = 1080;
-		break;
-	default:
-		DEBUG_MSG(KERN_INFO "Unknown panel size max resolution = %d ! "
-					 "set default panel size.\n", max_h);
-		break;
-	}
-
 	DEBUG_MSG(KERN_INFO "DVI max pixelclock = %d\n",
 		tmds_setting->max_pixel_clock);
 	tmds_chip->tmds_chip_slave_addr = restore;
 }
 
-/* Get Panel Size Using EDID2 Table */
-static void __devinit dvi_get_panel_size_from_DDCv2(
-	struct tmds_chip_information *tmds_chip,
-	struct tmds_setting_information *tmds_setting)
-{
-	int restore;
-	unsigned char R_Buffer[2];
-
-	DEBUG_MSG(KERN_INFO "\n dvi_get_panel_size_from_DDCv2 \n");
-
-	restore = tmds_chip->tmds_chip_slave_addr;
-	tmds_chip->tmds_chip_slave_addr = 0xA2;
-
-	/* Horizontal: 0x76, 0x77 */
-	tmds_register_read_bytes(0x76, R_Buffer, 2);
-	tmds_setting->max_hres = R_Buffer[0] + (R_Buffer[1] << 8);
-
-	switch (tmds_setting->max_hres) {
-	case 640:
-		tmds_setting->max_vres = 480;
-		break;
-	case 800:
-		tmds_setting->max_vres = 600;
-		break;
-	case 1024:
-		tmds_setting->max_vres = 768;
-		break;
-	case 1280:
-		tmds_setting->max_vres = 1024;
-		break;
-	case 1400:
-		tmds_setting->max_vres = 1050;
-		break;
-	case 1440:
-		tmds_setting->max_vres = 1050;
-		break;
-	case 1600:
-		tmds_setting->max_vres = 1200;
-		break;
-	default:
-		DEBUG_MSG(KERN_INFO "Unknown panel size max resolution = %d! "
-			"set default panel size.\n", tmds_setting->max_hres);
-		break;
-	}
-
-	tmds_chip->tmds_chip_slave_addr = restore;
-}
-
 /* If Disable DVI, turn off pad */
 void viafb_dvi_disable(void)
 {
diff --git a/drivers/video/via/dvi.h b/drivers/video/via/dvi.h
index 2c525c0..f473dd0 100644
--- a/drivers/video/via/dvi.h
+++ b/drivers/video/via/dvi.h
@@ -56,7 +56,7 @@
 int viafb_dvi_sense(void);
 void viafb_dvi_disable(void);
 void viafb_dvi_enable(void);
-int __devinit viafb_tmds_trasmitter_identify(void);
+bool __devinit viafb_tmds_trasmitter_identify(void);
 void __devinit viafb_init_dvi_size(struct tmds_chip_information *tmds_chip,
 	struct tmds_setting_information *tmds_setting);
 void viafb_dvi_set_mode(struct VideoModeTable *videoMode, int mode_bpp,
diff --git a/drivers/video/via/global.c b/drivers/video/via/global.c
index 1ee511b..e10d824 100644
--- a/drivers/video/via/global.c
+++ b/drivers/video/via/global.c
@@ -40,10 +40,6 @@ int viafb_hotplug_Yres = 480;
 int viafb_hotplug_bpp = 32;
 int viafb_hotplug_refresh = 60;
 int viafb_primary_dev = None_Device;
-unsigned int viafb_second_xres = 640;
-unsigned int viafb_second_yres = 480;
-unsigned int viafb_second_virtual_xres;
-unsigned int viafb_second_virtual_yres;
 int viafb_lcd_panel_id = LCD_PANEL_ID_MAXIMUM + 1;
 struct fb_info *viafbinfo;
 struct fb_info *viafbinfo1;
diff --git a/drivers/video/via/global.h b/drivers/video/via/global.h
index 38ef5ac..ff969dc 100644
--- a/drivers/video/via/global.h
+++ b/drivers/video/via/global.h
@@ -73,8 +73,6 @@ extern int viafb_hotplug_bpp;
 extern int viafb_hotplug_refresh;
 extern int viafb_primary_dev;
 
-extern unsigned int viafb_second_xres;
-extern unsigned int viafb_second_yres;
 extern int viafb_lcd_panel_id;
 
 #endif /* __GLOBAL_H__ */
diff --git a/drivers/video/via/hw.c b/drivers/video/via/hw.c
index dc4c778..47b1353 100644
--- a/drivers/video/via/hw.c
+++ b/drivers/video/via/hw.c
@@ -20,274 +20,84 @@
  */
 
 #include <linux/via-core.h>
+#include <asm/olpc.h>
 #include "global.h"
-
-static struct pll_config cle266_pll_config[] = {
-	{19, 4, 0},
-	{26, 5, 0},
-	{28, 5, 0},
-	{31, 5, 0},
-	{33, 5, 0},
-	{55, 5, 0},
-	{102, 5, 0},
-	{53, 6, 0},
-	{92, 6, 0},
-	{98, 6, 0},
-	{112, 6, 0},
-	{41, 7, 0},
-	{60, 7, 0},
-	{99, 7, 0},
-	{100, 7, 0},
-	{83, 8, 0},
-	{86, 8, 0},
-	{108, 8, 0},
-	{87, 9, 0},
-	{118, 9, 0},
-	{95, 12, 0},
-	{115, 12, 0},
-	{108, 13, 0},
-	{83, 17, 0},
-	{67, 20, 0},
-	{86, 20, 0},
-	{98, 20, 0},
-	{121, 24, 0},
-	{99, 29, 0},
-	{33, 3, 1},
-	{15, 4, 1},
-	{23, 4, 1},
-	{37, 5, 1},
-	{83, 5, 1},
-	{85, 5, 1},
-	{94, 5, 1},
-	{103, 5, 1},
-	{109, 5, 1},
-	{113, 5, 1},
-	{121, 5, 1},
-	{82, 6, 1},
-	{31, 7, 1},
-	{55, 7, 1},
-	{84, 7, 1},
-	{83, 8, 1},
-	{76, 9, 1},
-	{127, 9, 1},
-	{33, 4, 2},
-	{75, 4, 2},
-	{119, 4, 2},
-	{121, 4, 2},
-	{91, 5, 2},
-	{118, 5, 2},
-	{83, 6, 2},
-	{109, 6, 2},
-	{90, 7, 2},
-	{93, 2, 3},
-	{53, 3, 3},
-	{73, 4, 3},
-	{89, 4, 3},
-	{105, 4, 3},
-	{117, 4, 3},
-	{101, 5, 3},
-	{121, 5, 3},
-	{127, 5, 3},
-	{99, 7, 3}
+#include "via_clock.h"
+
+static struct pll_limit cle266_pll_limits[] = {
+	{19, 19, 4, 0},
+	{26, 102, 5, 0},
+	{53, 112, 6, 0},
+	{41, 100, 7, 0},
+	{83, 108, 8, 0},
+	{87, 118, 9, 0},
+	{95, 115, 12, 0},
+	{108, 108, 13, 0},
+	{83, 83, 17, 0},
+	{67, 98, 20, 0},
+	{121, 121, 24, 0},
+	{99, 99, 29, 0},
+	{33, 33, 3, 1},
+	{15, 23, 4, 1},
+	{37, 121, 5, 1},
+	{82, 82, 6, 1},
+	{31, 84, 7, 1},
+	{83, 83, 8, 1},
+	{76, 127, 9, 1},
+	{33, 121, 4, 2},
+	{91, 118, 5, 2},
+	{83, 109, 6, 2},
+	{90, 90, 7, 2},
+	{93, 93, 2, 3},
+	{53, 53, 3, 3},
+	{73, 117, 4, 3},
+	{101, 127, 5, 3},
+	{99, 99, 7, 3}
 };
 
-static struct pll_config k800_pll_config[] = {
-	{22, 2, 0},
-	{28, 3, 0},
-	{81, 3, 1},
-	{85, 3, 1},
-	{98, 3, 1},
-	{112, 3, 1},
-	{86, 4, 1},
-	{166, 4, 1},
-	{109, 5, 1},
-	{113, 5, 1},
-	{121, 5, 1},
-	{131, 5, 1},
-	{143, 5, 1},
-	{153, 5, 1},
-	{66, 3, 2},
-	{68, 3, 2},
-	{95, 3, 2},
-	{106, 3, 2},
-	{116, 3, 2},
-	{93, 4, 2},
-	{119, 4, 2},
-	{121, 4, 2},
-	{133, 4, 2},
-	{137, 4, 2},
-	{117, 5, 2},
-	{118, 5, 2},
-	{120, 5, 2},
-	{124, 5, 2},
-	{132, 5, 2},
-	{137, 5, 2},
-	{141, 5, 2},
-	{166, 5, 2},
-	{170, 5, 2},
-	{191, 5, 2},
-	{206, 5, 2},
-	{208, 5, 2},
-	{30, 2, 3},
-	{69, 3, 3},
-	{82, 3, 3},
-	{83, 3, 3},
-	{109, 3, 3},
-	{114, 3, 3},
-	{125, 3, 3},
-	{89, 4, 3},
-	{103, 4, 3},
-	{117, 4, 3},
-	{126, 4, 3},
-	{150, 4, 3},
-	{161, 4, 3},
-	{121, 5, 3},
-	{127, 5, 3},
-	{131, 5, 3},
-	{134, 5, 3},
-	{148, 5, 3},
-	{169, 5, 3},
-	{172, 5, 3},
-	{182, 5, 3},
-	{195, 5, 3},
-	{196, 5, 3},
-	{208, 5, 3},
-	{66, 2, 4},
-	{85, 3, 4},
-	{141, 4, 4},
-	{146, 4, 4},
-	{161, 4, 4},
-	{177, 5, 4}
+static struct pll_limit k800_pll_limits[] = {
+	{22, 22, 2, 0},
+	{28, 28, 3, 0},
+	{81, 112, 3, 1},
+	{86, 166, 4, 1},
+	{109, 153, 5, 1},
+	{66, 116, 3, 2},
+	{93, 137, 4, 2},
+	{117, 208, 5, 2},
+	{30, 30, 2, 3},
+	{69, 125, 3, 3},
+	{89, 161, 4, 3},
+	{121, 208, 5, 3},
+	{66, 66, 2, 4},
+	{85, 85, 3, 4},
+	{141, 161, 4, 4},
+	{177, 177, 5, 4}
 };
 
-static struct pll_config cx700_pll_config[] = {
-	{98, 3, 1},
-	{86, 4, 1},
-	{109, 5, 1},
-	{110, 5, 1},
-	{113, 5, 1},
-	{121, 5, 1},
-	{131, 5, 1},
-	{135, 5, 1},
-	{142, 5, 1},
-	{143, 5, 1},
-	{153, 5, 1},
-	{187, 5, 1},
-	{208, 5, 1},
-	{68, 2, 2},
-	{95, 3, 2},
-	{116, 3, 2},
-	{93, 4, 2},
-	{119, 4, 2},
-	{133, 4, 2},
-	{137, 4, 2},
-	{151, 4, 2},
-	{166, 4, 2},
-	{110, 5, 2},
-	{112, 5, 2},
-	{117, 5, 2},
-	{118, 5, 2},
-	{120, 5, 2},
-	{132, 5, 2},
-	{137, 5, 2},
-	{141, 5, 2},
-	{151, 5, 2},
-	{166, 5, 2},
-	{175, 5, 2},
-	{191, 5, 2},
-	{206, 5, 2},
-	{174, 7, 2},
-	{82, 3, 3},
-	{109, 3, 3},
-	{117, 4, 3},
-	{150, 4, 3},
-	{161, 4, 3},
-	{112, 5, 3},
-	{115, 5, 3},
-	{121, 5, 3},
-	{127, 5, 3},
-	{129, 5, 3},
-	{131, 5, 3},
-	{134, 5, 3},
-	{138, 5, 3},
-	{148, 5, 3},
-	{157, 5, 3},
-	{169, 5, 3},
-	{172, 5, 3},
-	{190, 5, 3},
-	{195, 5, 3},
-	{196, 5, 3},
-	{208, 5, 3},
-	{141, 5, 4},
-	{150, 5, 4},
-	{166, 5, 4},
-	{176, 5, 4},
-	{177, 5, 4},
-	{183, 5, 4},
-	{202, 5, 4}
+static struct pll_limit cx700_pll_limits[] = {
+	{98, 98, 3, 1},
+	{86, 86, 4, 1},
+	{109, 208, 5, 1},
+	{68, 68, 2, 2},
+	{95, 116, 3, 2},
+	{93, 166, 4, 2},
+	{110, 206, 5, 2},
+	{174, 174, 7, 2},
+	{82, 109, 3, 3},
+	{117, 161, 4, 3},
+	{112, 208, 5, 3},
+	{141, 202, 5, 4}
 };
 
-static struct pll_config vx855_pll_config[] = {
-	{86, 4, 1},
-	{108, 5, 1},
-	{110, 5, 1},
-	{113, 5, 1},
-	{121, 5, 1},
-	{131, 5, 1},
-	{135, 5, 1},
-	{142, 5, 1},
-	{143, 5, 1},
-	{153, 5, 1},
-	{164, 5, 1},
-	{187, 5, 1},
-	{208, 5, 1},
-	{110, 5, 2},
-	{112, 5, 2},
-	{117, 5, 2},
-	{118, 5, 2},
-	{124, 5, 2},
-	{132, 5, 2},
-	{137, 5, 2},
-	{141, 5, 2},
-	{149, 5, 2},
-	{151, 5, 2},
-	{159, 5, 2},
-	{166, 5, 2},
-	{167, 5, 2},
-	{172, 5, 2},
-	{189, 5, 2},
-	{191, 5, 2},
-	{194, 5, 2},
-	{206, 5, 2},
-	{208, 5, 2},
-	{83, 3, 3},
-	{88, 3, 3},
-	{109, 3, 3},
-	{112, 3, 3},
-	{103, 4, 3},
-	{105, 4, 3},
-	{161, 4, 3},
-	{112, 5, 3},
-	{115, 5, 3},
-	{121, 5, 3},
-	{127, 5, 3},
-	{134, 5, 3},
-	{137, 5, 3},
-	{148, 5, 3},
-	{157, 5, 3},
-	{169, 5, 3},
-	{172, 5, 3},
-	{182, 5, 3},
-	{191, 5, 3},
-	{195, 5, 3},
-	{209, 5, 3},
-	{142, 4, 4},
-	{146, 4, 4},
-	{161, 4, 4},
-	{141, 5, 4},
-	{150, 5, 4},
-	{165, 5, 4},
-	{176, 5, 4}
+static struct pll_limit vx855_pll_limits[] = {
+	{86, 86, 4, 1},
+	{108, 208, 5, 1},
+	{110, 208, 5, 2},
+	{83, 112, 3, 3},
+	{103, 161, 4, 3},
+	{112, 209, 5, 3},
+	{142, 161, 4, 4},
+	{141, 176, 5, 4}
 };
 
 /* according to VIA Technologies these values are based on experiment */
@@ -308,6 +118,42 @@ static struct io_reg scaling_parameters[] = {
 	{VIACR, CR87, 0xFF, 0x1F},	/* LCD Scaling Parameter 14 */
 };
 
+static struct io_reg common_vga[] = {
+	{VIACR, CR07, 0x10, 0x10}, /* [0] vertical total (bit 8)
+					[1] vertical display end (bit 8)
+					[2] vertical retrace start (bit 8)
+					[3] start vertical blanking (bit 8)
+					[4] line compare (bit 8)
+					[5] vertical total (bit 9)
+					[6] vertical display end (bit 9)
+					[7] vertical retrace start (bit 9) */
+	{VIACR, CR08, 0xFF, 0x00}, /* [0-4] preset row scan
+					[5-6] byte panning */
+	{VIACR, CR09, 0xDF, 0x40}, /* [0-4] max scan line
+					[5] start vertical blanking (bit 9)
+					[6] line compare (bit 9)
+					[7] scan doubling */
+	{VIACR, CR0A, 0xFF, 0x1E}, /* [0-4] cursor start
+					[5] cursor disable */
+	{VIACR, CR0B, 0xFF, 0x00}, /* [0-4] cursor end
+					[5-6] cursor skew */
+	{VIACR, CR0E, 0xFF, 0x00}, /* [0-7] cursor location (high) */
+	{VIACR, CR0F, 0xFF, 0x00}, /* [0-7] cursor location (low) */
+	{VIACR, CR11, 0xF0, 0x80}, /* [0-3] vertical retrace end
+					[6] memory refresh bandwidth
+					[7] CRTC register protect enable */
+	{VIACR, CR14, 0xFF, 0x00}, /* [0-4] underline location
+					[5] divide memory address clock by 4
+					[6] double word addressing */
+	{VIACR, CR17, 0xFF, 0x63}, /* [0-1] mapping of display address 13-14
+					[2] divide scan line clock by 2
+					[3] divide memory address clock by 2
+					[5] address wrap
+					[6] byte mode select
+					[7] sync enable */
+	{VIACR, CR18, 0xFF, 0xFF}, /* [0-7] line compare */
+};
+
 static struct fifo_depth_select display_fifo_depth_reg = {
 	/* IGA1 FIFO Depth_Select */
 	{IGA1_FIFO_DEPTH_SELECT_REG_NUM, {{SR17, 0, 7} } },
@@ -676,6 +522,9 @@ static struct via_device_mapping device_mapping[] = {
 	{VIA_LVDS2, "LVDS2"}
 };
 
+/* structure with function pointers to support clock control */
+static struct via_clock clock;
+
 static void load_fix_bit_crtc_reg(void);
 static void __devinit init_gfx_chip_info(int chip_type);
 static void __devinit init_tmds_chip_info(void);
@@ -770,13 +619,14 @@ static u32 get_lcd_devices(int output_interface)
 /*Set IGA path for each device*/
 void viafb_set_iga_path(void)
 {
+	int crt_iga_path = 0;
 
 	if (viafb_SAMM_ON == 1) {
 		if (viafb_CRT_ON) {
 			if (viafb_primary_dev == CRT_Device)
-				viaparinfo->crt_setting_info->iga_path = IGA1;
+				crt_iga_path = IGA1;
 			else
-				viaparinfo->crt_setting_info->iga_path = IGA2;
+				crt_iga_path = IGA2;
 		}
 
 		if (viafb_DVI_ON) {
@@ -793,8 +643,7 @@ void viafb_set_iga_path(void)
 					UNICHROME_CLE266)) {
 					viaparinfo->
 					lvds_setting_info->iga_path = IGA2;
-					viaparinfo->
-					crt_setting_info->iga_path = IGA1;
+					crt_iga_path = IGA1;
 					viaparinfo->
 					tmds_setting_info->iga_path = IGA1;
 				} else
@@ -814,10 +663,10 @@ void viafb_set_iga_path(void)
 		viafb_SAMM_ON = 0;
 
 		if (viafb_CRT_ON && viafb_LCD_ON) {
-			viaparinfo->crt_setting_info->iga_path = IGA1;
+			crt_iga_path = IGA1;
 			viaparinfo->lvds_setting_info->iga_path = IGA2;
 		} else if (viafb_CRT_ON && viafb_DVI_ON) {
-			viaparinfo->crt_setting_info->iga_path = IGA1;
+			crt_iga_path = IGA1;
 			viaparinfo->tmds_setting_info->iga_path = IGA2;
 		} else if (viafb_LCD_ON && viafb_DVI_ON) {
 			viaparinfo->tmds_setting_info->iga_path = IGA1;
@@ -826,7 +675,7 @@ void viafb_set_iga_path(void)
 			viaparinfo->lvds_setting_info->iga_path = IGA2;
 			viaparinfo->lvds_setting_info2->iga_path = IGA2;
 		} else if (viafb_CRT_ON) {
-			viaparinfo->crt_setting_info->iga_path = IGA1;
+			crt_iga_path = IGA1;
 		} else if (viafb_LCD_ON) {
 			viaparinfo->lvds_setting_info->iga_path = IGA2;
 		} else if (viafb_DVI_ON) {
@@ -837,7 +686,7 @@ void viafb_set_iga_path(void)
 	viaparinfo->shared->iga1_devices = 0;
 	viaparinfo->shared->iga2_devices = 0;
 	if (viafb_CRT_ON) {
-		if (viaparinfo->crt_setting_info->iga_path == IGA1)
+		if (crt_iga_path == IGA1)
 			viaparinfo->shared->iga1_devices |= VIA_CRT;
 		else
 			viaparinfo->shared->iga2_devices |= VIA_CRT;
@@ -875,6 +724,10 @@ void viafb_set_iga_path(void)
 				viaparinfo->chip_info->
 				lvds_chip_info2.output_interface);
 	}
+
+	/* looks like the OLPC has its display wired to DVP1 and LVDS2 */
+	if (machine_is_olpc())
+		viaparinfo->shared->iga2_devices = VIA_DVP1 | VIA_LVDS2;
 }
 
 static void set_color_register(u8 index, u8 red, u8 green, u8 blue)
@@ -1162,25 +1015,17 @@ void via_odev_to_seq(struct seq_file *m, u32 odev)
 
 static void load_fix_bit_crtc_reg(void)
 {
+	viafb_unlock_crt();
+
 	/* always set to 1 */
 	viafb_write_reg_mask(CR03, VIACR, 0x80, BIT7);
 	/* line compare should set all bits = 1 (extend modes) */
-	viafb_write_reg(CR18, VIACR, 0xff);
-	/* line compare should set all bits = 1 (extend modes) */
-	viafb_write_reg_mask(CR07, VIACR, 0x10, BIT4);
-	/* line compare should set all bits = 1 (extend modes) */
-	viafb_write_reg_mask(CR09, VIACR, 0x40, BIT6);
-	/* line compare should set all bits = 1 (extend modes) */
 	viafb_write_reg_mask(CR35, VIACR, 0x10, BIT4);
 	/* line compare should set all bits = 1 (extend modes) */
 	viafb_write_reg_mask(CR33, VIACR, 0x06, BIT0 + BIT1 + BIT2);
 	/*viafb_write_reg_mask(CR32, VIACR, 0x01, BIT0); */
-	/* extend mode always set to e3h */
-	viafb_write_reg(CR17, VIACR, 0xe3);
-	/* extend mode always set to 0h */
-	viafb_write_reg(CR08, VIACR, 0x00);
-	/* extend mode always set to 0h */
-	viafb_write_reg(CR14, VIACR, 0x00);
+
+	viafb_lock_crt();
 
 	/* If K8M800, enable Prefetch Mode. */
 	if ((viaparinfo->chip_info->gfx_chip_name == UNICHROME_K800)
@@ -1601,69 +1446,54 @@ void viafb_load_FIFO_reg(int set_iga, int hor_active, int ver_active)
 
 }
 
-static u32 cle266_encode_pll(struct pll_config pll)
-{
-	return (pll.multiplier << 8)
-		| (pll.rshift << 6)
-		| pll.divisor;
-}
-
-static u32 k800_encode_pll(struct pll_config pll)
-{
-	return ((pll.divisor - 2) << 16)
-		| (pll.rshift << 10)
-		| (pll.multiplier - 2);
-}
-
-static u32 vx855_encode_pll(struct pll_config pll)
-{
-	return (pll.divisor << 16)
-		| (pll.rshift << 10)
-		| pll.multiplier;
-}
-
-static inline u32 get_pll_internal_frequency(u32 ref_freq,
-	struct pll_config pll)
-{
-	return ref_freq / pll.divisor * pll.multiplier;
-}
-
-static inline u32 get_pll_output_frequency(u32 ref_freq, struct pll_config pll)
-{
-	return get_pll_internal_frequency(ref_freq, pll)>>pll.rshift;
-}
-
-static struct pll_config get_pll_config(struct pll_config *config, int size,
+static struct via_pll_config get_pll_config(struct pll_limit *limits, int size,
 	int clk)
 {
-	struct pll_config best = config[0];
+	struct via_pll_config cur, up, down, best = {0, 1, 0};
 	const u32 f0 = 14318180; /* X1 frequency */
-	int i;
-
-	for (i = 1; i < size; i++) {
-		if (abs(get_pll_output_frequency(f0, config[i]) - clk)
-			< abs(get_pll_output_frequency(f0, best) - clk))
-			best = config[i];
+	int i, f;
+
+	for (i = 0; i < size; i++) {
+		cur.rshift = limits[i].rshift;
+		cur.divisor = limits[i].divisor;
+		cur.multiplier = clk / ((f0 / cur.divisor)>>cur.rshift);
+		f = abs(get_pll_output_frequency(f0, cur) - clk);
+		up = down = cur;
+		up.multiplier++;
+		down.multiplier--;
+		if (abs(get_pll_output_frequency(f0, up) - clk) < f)
+			cur = up;
+		else if (abs(get_pll_output_frequency(f0, down) - clk) < f)
+			cur = down;
+
+		if (cur.multiplier < limits[i].multiplier_min)
+			cur.multiplier = limits[i].multiplier_min;
+		else if (cur.multiplier > limits[i].multiplier_max)
+			cur.multiplier = limits[i].multiplier_max;
+
+		f = abs(get_pll_output_frequency(f0, cur) - clk);
+		if (f < abs(get_pll_output_frequency(f0, best) - clk))
+			best = cur;
 	}
 
 	return best;
 }
 
-u32 viafb_get_clk_value(int clk)
+static struct via_pll_config get_best_pll_config(int clk)
 {
-	u32 value = 0;
+	struct via_pll_config config;
 
 	switch (viaparinfo->chip_info->gfx_chip_name) {
 	case UNICHROME_CLE266:
 	case UNICHROME_K400:
-		value = cle266_encode_pll(get_pll_config(cle266_pll_config,
-			ARRAY_SIZE(cle266_pll_config), clk));
+		config = get_pll_config(cle266_pll_limits,
+			ARRAY_SIZE(cle266_pll_limits), clk);
 		break;
 	case UNICHROME_K800:
 	case UNICHROME_PM800:
 	case UNICHROME_CN700:
-		value = k800_encode_pll(get_pll_config(k800_pll_config,
-			ARRAY_SIZE(k800_pll_config), clk));
+		config = get_pll_config(k800_pll_limits,
+			ARRAY_SIZE(k800_pll_limits), clk);
 		break;
 	case UNICHROME_CX700:
 	case UNICHROME_CN750:
@@ -1671,92 +1501,28 @@ u32 viafb_get_clk_value(int clk)
 	case UNICHROME_P4M890:
 	case UNICHROME_P4M900:
 	case UNICHROME_VX800:
-		value = k800_encode_pll(get_pll_config(cx700_pll_config,
-			ARRAY_SIZE(cx700_pll_config), clk));
+		config = get_pll_config(cx700_pll_limits,
+			ARRAY_SIZE(cx700_pll_limits), clk);
 		break;
 	case UNICHROME_VX855:
 	case UNICHROME_VX900:
-		value = vx855_encode_pll(get_pll_config(vx855_pll_config,
-			ARRAY_SIZE(vx855_pll_config), clk));
+		config = get_pll_config(vx855_pll_limits,
+			ARRAY_SIZE(vx855_pll_limits), clk);
 		break;
 	}
 
-	return value;
+	return config;
 }
 
 /* Set VCLK*/
 void viafb_set_vclock(u32 clk, int set_iga)
 {
-	/* H.W. Reset : ON */
-	viafb_write_reg_mask(CR17, VIACR, 0x00, BIT7);
+	struct via_pll_config config = get_best_pll_config(clk);
 
-	if (set_iga == IGA1) {
-		/* Change D,N FOR VCLK */
-		switch (viaparinfo->chip_info->gfx_chip_name) {
-		case UNICHROME_CLE266:
-		case UNICHROME_K400:
-			via_write_reg(VIASR, SR46, (clk & 0x00FF));
-			via_write_reg(VIASR, SR47, (clk & 0xFF00) >> 8);
-			break;
-
-		case UNICHROME_K800:
-		case UNICHROME_PM800:
-		case UNICHROME_CN700:
-		case UNICHROME_CX700:
-		case UNICHROME_CN750:
-		case UNICHROME_K8M890:
-		case UNICHROME_P4M890:
-		case UNICHROME_P4M900:
-		case UNICHROME_VX800:
-		case UNICHROME_VX855:
-		case UNICHROME_VX900:
-			via_write_reg(VIASR, SR44, (clk & 0x0000FF));
-			via_write_reg(VIASR, SR45, (clk & 0x00FF00) >> 8);
-			via_write_reg(VIASR, SR46, (clk & 0xFF0000) >> 16);
-			break;
-		}
-	}
-
-	if (set_iga == IGA2) {
-		/* Change D,N FOR LCK */
-		switch (viaparinfo->chip_info->gfx_chip_name) {
-		case UNICHROME_CLE266:
-		case UNICHROME_K400:
-			via_write_reg(VIASR, SR44, (clk & 0x00FF));
-			via_write_reg(VIASR, SR45, (clk & 0xFF00) >> 8);
-			break;
-
-		case UNICHROME_K800:
-		case UNICHROME_PM800:
-		case UNICHROME_CN700:
-		case UNICHROME_CX700:
-		case UNICHROME_CN750:
-		case UNICHROME_K8M890:
-		case UNICHROME_P4M890:
-		case UNICHROME_P4M900:
-		case UNICHROME_VX800:
-		case UNICHROME_VX855:
-		case UNICHROME_VX900:
-			via_write_reg(VIASR, SR4A, (clk & 0x0000FF));
-			via_write_reg(VIASR, SR4B, (clk & 0x00FF00) >> 8);
-			via_write_reg(VIASR, SR4C, (clk & 0xFF0000) >> 16);
-			break;
-		}
-	}
-
-	/* H.W. Reset : OFF */
-	viafb_write_reg_mask(CR17, VIACR, 0x80, BIT7);
-
-	/* Reset PLL */
-	if (set_iga == IGA1) {
-		viafb_write_reg_mask(SR40, VIASR, 0x02, BIT1);
-		viafb_write_reg_mask(SR40, VIASR, 0x00, BIT1);
-	}
-
-	if (set_iga == IGA2) {
-		viafb_write_reg_mask(SR40, VIASR, 0x04, BIT2);
-		viafb_write_reg_mask(SR40, VIASR, 0x00, BIT2);
-	}
+	if (set_iga == IGA1)
+		clock.set_primary_pll(config);
+	if (set_iga == IGA2)
+		clock.set_secondary_pll(config);
 
 	/* Fire! */
 	via_write_misc_reg_mask(0x0C, 0x0C); /* select external clock */
@@ -2002,7 +1768,7 @@ void viafb_fill_crtc_timing(struct crt_mode_table *crt_table,
 	int i;
 	int index = 0;
 	int h_addr, v_addr;
-	u32 pll_D_N, clock, refresh = viafb_refresh;
+	u32 clock, refresh = viafb_refresh;
 
 	if (viafb_SAMM_ON && set_iga == IGA2)
 		refresh = viafb_refresh1;
@@ -2033,8 +1799,6 @@ void viafb_fill_crtc_timing(struct crt_mode_table *crt_table,
 	v_addr = crt_reg.ver_addr;
 	if (set_iga == IGA1) {
 		viafb_unlock_crt();
-		viafb_write_reg(CR09, VIACR, 0x00);	/*initial CR09=0 */
-		viafb_write_reg_mask(CR11, VIACR, 0x00, BIT4 + BIT5 + BIT6);
 		viafb_write_reg_mask(CR17, VIACR, 0x00, BIT7);
 	}
 
@@ -2047,7 +1811,6 @@ void viafb_fill_crtc_timing(struct crt_mode_table *crt_table,
 		break;
 	}
 
-	load_fix_bit_crtc_reg();
 	viafb_lock_crt();
 	viafb_write_reg_mask(CR17, VIACR, 0x80, BIT7);
 	viafb_load_fetch_count_reg(h_addr, bpp_byte, set_iga);
@@ -2059,20 +1822,17 @@ void viafb_fill_crtc_timing(struct crt_mode_table *crt_table,
 
 	clock = crt_reg.hor_total * crt_reg.ver_total
 		* crt_table[index].refresh_rate;
-	pll_D_N = viafb_get_clk_value(clock);
-	DEBUG_MSG(KERN_INFO "PLL=%x", pll_D_N);
-	viafb_set_vclock(pll_D_N, set_iga);
+	viafb_set_vclock(clock, set_iga);
 
 }
 
 void __devinit viafb_init_chip_info(int chip_type)
 {
+	via_clock_init(&clock, chip_type);
 	init_gfx_chip_info(chip_type);
 	init_tmds_chip_info();
 	init_lvds_chip_info();
 
-	viaparinfo->crt_setting_info->iga_path = IGA1;
-
 	/*Set IGA path for each device */
 	viafb_set_iga_path();
 
@@ -2354,6 +2114,7 @@ int viafb_setmode(struct VideoModeTable *vmode_tbl, int video_bpp,
 	outb(0x00, VIAAR);
 
 	/* Write Common Setting for Video Mode */
+	viafb_write_regx(common_vga, ARRAY_SIZE(common_vga));
 	switch (viaparinfo->chip_info->gfx_chip_name) {
 	case UNICHROME_CLE266:
 		viafb_write_regx(CLE266_ModeXregs, NUM_TOTAL_CLE266_ModeXregs);
@@ -2400,9 +2161,6 @@ int viafb_setmode(struct VideoModeTable *vmode_tbl, int video_bpp,
 
 	viafb_write_reg_mask(0x15, VIASR, 0xA2, 0xA2);
 
-	/* Write CRTC */
-	viafb_fill_crtc_timing(crt_timing, vmode_tbl, video_bpp / 8, IGA1);
-
 	/* Write Graphic Controller */
 	for (i = 0; i < StdGR; i++)
 		via_write_reg(VIAGR, i, VPIT.GR[i]);
@@ -2432,6 +2190,7 @@ int viafb_setmode(struct VideoModeTable *vmode_tbl, int video_bpp,
 		}
 	}
 
+	load_fix_bit_crtc_reg();
 	via_set_primary_pitch(viafbinfo->fix.line_length);
 	via_set_secondary_pitch(viafb_dual_fb ? viafbinfo1->fix.line_length
 		: viafbinfo->fix.line_length);
@@ -2451,15 +2210,15 @@ int viafb_setmode(struct VideoModeTable *vmode_tbl, int video_bpp,
 
 	/* CRT set mode */
 	if (viafb_CRT_ON) {
-		if (viafb_SAMM_ON && (viaparinfo->crt_setting_info->iga_path ==
-			IGA2)) {
+		if (viafb_SAMM_ON &&
+			viaparinfo->shared->iga2_devices & VIA_CRT) {
 			viafb_fill_crtc_timing(crt_timing1, vmode_tbl1,
-				video_bpp1 / 8,
-				viaparinfo->crt_setting_info->iga_path);
+				video_bpp1 / 8, IGA2);
 		} else {
 			viafb_fill_crtc_timing(crt_timing, vmode_tbl,
 				video_bpp / 8,
-				viaparinfo->crt_setting_info->iga_path);
+				(viaparinfo->shared->iga1_devices & VIA_CRT)
+				? IGA1 : IGA2);
 		}
 
 		/* Patch if set_hres is not 8 alignment (1366) to viafb_setmode
@@ -2557,6 +2316,33 @@ int viafb_setmode(struct VideoModeTable *vmode_tbl, int video_bpp,
 			get_sync(viafbinfo1));
 	}
 
+	clock.set_engine_pll_state(VIA_STATE_ON);
+	clock.set_primary_clock_source(VIA_CLKSRC_X1, true);
+	clock.set_secondary_clock_source(VIA_CLKSRC_X1, true);
+
+#ifdef CONFIG_FB_VIA_X_COMPATIBILITY
+	clock.set_primary_pll_state(VIA_STATE_ON);
+	clock.set_primary_clock_state(VIA_STATE_ON);
+	clock.set_secondary_pll_state(VIA_STATE_ON);
+	clock.set_secondary_clock_state(VIA_STATE_ON);
+#else
+	if (viaparinfo->shared->iga1_devices) {
+		clock.set_primary_pll_state(VIA_STATE_ON);
+		clock.set_primary_clock_state(VIA_STATE_ON);
+	} else {
+		clock.set_primary_pll_state(VIA_STATE_OFF);
+		clock.set_primary_clock_state(VIA_STATE_OFF);
+	}
+
+	if (viaparinfo->shared->iga2_devices) {
+		clock.set_secondary_pll_state(VIA_STATE_ON);
+		clock.set_secondary_clock_state(VIA_STATE_ON);
+	} else {
+		clock.set_secondary_pll_state(VIA_STATE_OFF);
+		clock.set_secondary_clock_state(VIA_STATE_OFF);
+	}
+#endif /*CONFIG_FB_VIA_X_COMPATIBILITY*/
+
 	via_set_state(devices, VIA_STATE_ON);
 	device_screen_on();
 	return 1;
@@ -2598,8 +2384,12 @@ int viafb_get_refresh(int hres, int vres, u32 long_refresh)
 			best = &vmode->crtc[i];
 	}
 
-	if (abs(best->refresh_rate - long_refresh) > 3)
-		return 60;
+	if (abs(best->refresh_rate - long_refresh) > 3) {
+		if (hres == 1200 && vres == 900)
+			return 49; /* OLPC DCON only supports 50 Hz */
+		else
+			return 60;
+	}
 
 	return best->refresh_rate;
 }
diff --git a/drivers/video/via/hw.h b/drivers/video/via/hw.h
index 8858593..c7239eb 100644
--- a/drivers/video/via/hw.h
+++ b/drivers/video/via/hw.h
@@ -732,20 +732,13 @@ struct _lcd_scaling_factor {
 	struct _lcd_ver_scaling_factor lcd_ver_scaling_factor;
 };
 
-struct pll_config {
-	u16 multiplier;
+struct pll_limit {
+	u16 multiplier_min;
+	u16 multiplier_max;
 	u8 divisor;
 	u8 rshift;
 };
 
-struct pll_map {
-	u32 clk;
-	struct pll_config cle266_pll;
-	struct pll_config k800_pll;
-	struct pll_config cx700_pll;
-	struct pll_config vx855_pll;
-};
-
 struct rgbLUT {
 	u8 red;
 	u8 green;
@@ -910,7 +903,6 @@ struct via_device_mapping {
 	const char *name;
 };
 
-extern unsigned int viafb_second_virtual_xres;
 extern int viafb_SAMM_ON;
 extern int viafb_dual_fb;
 extern int viafb_LCD2_ON;
@@ -936,7 +928,6 @@ void viafb_lock_crt(void);
 void viafb_unlock_crt(void);
 void viafb_load_fetch_count_reg(int h_addr, int bpp_byte, int set_iga);
 void viafb_write_regx(struct io_reg RegTable[], int ItemNum);
-u32 viafb_get_clk_value(int clk);
 void viafb_load_FIFO_reg(int set_iga, int hor_active, int ver_active);
 void viafb_set_dpa_gfx(int output_interface, struct GFX_DPA_SETTING\
 					*p_gfx_dpa_setting);
diff --git a/drivers/video/via/lcd.c b/drivers/video/via/lcd.c
index 64bc7e7..6e06981 100644
--- a/drivers/video/via/lcd.c
+++ b/drivers/video/via/lcd.c
@@ -48,7 +48,6 @@ static struct _lcd_scaling_factor lcd_scaling_factor_CLE = {
 	{LCD_VER_SCALING_FACTOR_REG_NUM_CLE, {{CR78, 0, 7}, {CR79, 6, 7} } }
 };
 
-static int check_lvds_chip(int device_id_subaddr, int device_id);
 static bool lvds_identify_integratedlvds(void);
 static void __devinit fp_id_to_vindex(int panel_id);
 static int lvds_register_read(int index);
@@ -84,12 +83,9 @@ static struct display_timing lcd_centering_timging(struct display_timing
 					    mode_crt_reg,
 					   struct display_timing panel_crt_reg);
 
-static int check_lvds_chip(int device_id_subaddr, int device_id)
+static inline bool check_lvds_chip(int device_id_subaddr, int device_id)
 {
-	if (lvds_register_read(device_id_subaddr) == device_id)
-		return OK;
-	else
-		return FAIL;
+	return lvds_register_read(device_id_subaddr) == device_id;
 }
 
 void __devinit viafb_init_lcd_size(void)
@@ -150,7 +146,7 @@ static bool lvds_identify_integratedlvds(void)
 	return true;
 }
 
-int __devinit viafb_lvds_trasmitter_identify(void)
+bool __devinit viafb_lvds_trasmitter_identify(void)
 {
 	if (viafb_lvds_identify_vt1636(VIA_PORT_31)) {
 		viaparinfo->chip_info->lvds_chip_info.i2c_port = VIA_PORT_31;
@@ -175,20 +171,20 @@ int __devinit viafb_lvds_trasmitter_identify(void)
 	viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr =
 		VT1631_LVDS_I2C_ADDR;
 
-	if (check_lvds_chip(VT1631_DEVICE_ID_REG, VT1631_DEVICE_ID) != FAIL) {
+	if (check_lvds_chip(VT1631_DEVICE_ID_REG, VT1631_DEVICE_ID)) {
 		DEBUG_MSG(KERN_INFO "\n VT1631 LVDS ! \n");
 		DEBUG_MSG(KERN_INFO "\n %2d",
 			  viaparinfo->chip_info->lvds_chip_info.lvds_chip_name);
 		DEBUG_MSG(KERN_INFO "\n %2d",
 			  viaparinfo->chip_info->lvds_chip_info.lvds_chip_name);
-		return OK;
+		return true;
 	}
 
 	viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
 		NON_LVDS_TRANSMITTER;
 	viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr =
 		VT1631_LVDS_I2C_ADDR;
-	return FAIL;
+	return false;
 }
 
 static void __devinit fp_id_to_vindex(int panel_id)
@@ -562,7 +558,7 @@ void viafb_lcd_set_mode(struct crt_mode_table *mode_crt_table,
 	int set_vres = plvds_setting_info->v_active;
 	int panel_hres = plvds_setting_info->lcd_panel_hres;
 	int panel_vres = plvds_setting_info->lcd_panel_vres;
-	u32 pll_D_N, clock;
+	u32 clock;
 	struct display_timing mode_crt_reg, panel_crt_reg;
 	struct crt_mode_table *panel_crt_table = NULL;
 	struct VideoModeTable *vmode_tbl = viafb_get_mode(panel_hres,
@@ -613,10 +609,7 @@ void viafb_lcd_set_mode(struct crt_mode_table *mode_crt_table,
 		viafb_load_FIFO_reg(set_iga, set_hres, set_vres);
 
 	fill_lcd_format();
-
-	pll_D_N = viafb_get_clk_value(clock);
-	DEBUG_MSG(KERN_INFO "PLL=0x%x", pll_D_N);
-	viafb_set_vclock(pll_D_N, set_iga);
+	viafb_set_vclock(clock, set_iga);
 	lcd_patch_skew(plvds_setting_info, plvds_chip_info);
 
 	/* If K8M800, enable LCD Prefetch Mode. */
diff --git a/drivers/video/via/lcd.h b/drivers/video/via/lcd.h
index c7909fe..75f60a6 100644
--- a/drivers/video/via/lcd.h
+++ b/drivers/video/via/lcd.h
@@ -79,7 +79,7 @@ void __devinit viafb_init_lvds_output_interface(struct lvds_chip_information
 void viafb_lcd_set_mode(struct crt_mode_table *mode_crt_table,
 		  struct lvds_setting_information *plvds_setting_info,
 		  struct lvds_chip_information *plvds_chip_info);
-int __devinit viafb_lvds_trasmitter_identify(void);
+bool __devinit viafb_lvds_trasmitter_identify(void);
 void viafb_init_lvds_output_interface(struct lvds_chip_information
 				*plvds_chip_info,
 				struct lvds_setting_information
diff --git a/drivers/video/via/share.h b/drivers/video/via/share.h
index 4b7831f..61b0bd5 100644
--- a/drivers/video/via/share.h
+++ b/drivers/video/via/share.h
@@ -22,14 +22,6 @@
 #ifndef __SHARE_H__
 #define __SHARE_H__
 
-/* Define Return Value */
-#define FAIL        -1
-#define OK          1
-
-#ifndef NULL
-#define NULL 0
-#endif
-
 /* Define Bit Field */
 #define BIT0    0x01
 #define BIT1    0x02
@@ -290,6 +282,7 @@
 #define HW_LAYOUT_LCD_EXTERNAL_LCD2 0x10
 
 /* Definition Refresh Rate */
+#define REFRESH_49      49
 #define REFRESH_50      50
 #define REFRESH_60      60
 #define REFRESH_75      75
@@ -575,10 +568,6 @@
 #define M1280X720_R50_HSP       NEGATIVE
 #define M1280X720_R50_VSP       POSITIVE
 
-/* 1280x720@60 Sync Polarity  (CEA Mode) */
-#define M1280X720_CEA_R60_HSP       POSITIVE
-#define M1280X720_CEA_R60_VSP       POSITIVE
-
 /* 1440x900@60 Sync Polarity (CVT Mode) */
 #define M1440X900_R60_HSP       NEGATIVE
 #define M1440X900_R60_VSP       POSITIVE
@@ -619,10 +608,6 @@
 #define M1920X1200_RB_R60_HSP  POSITIVE
 #define M1920X1200_RB_R60_VSP  NEGATIVE
 
-/* 1920x1080@60 Sync Polarity  (CEA Mode) */
-#define M1920X1080_CEA_R60_HSP       POSITIVE
-#define M1920X1080_CEA_R60_VSP       POSITIVE
-
 /* 2048x1536@60 Sync Polarity (CVT Mode) */
 #define M2048x1536_R60_HSP      NEGATIVE
 #define M2048x1536_R60_VSP      POSITIVE
diff --git a/drivers/video/via/via-core.c b/drivers/video/via/via-core.c
index 6723d69..eb112b6 100644
--- a/drivers/video/via/via-core.c
+++ b/drivers/video/via/via-core.c
@@ -505,7 +505,14 @@ static int __devinit via_pci_setup_mmio(struct viafb_dev *vdev)
 	ret = vdev->fbmem_len = viafb_get_fb_size_from_pci(vdev->chip_type);
 	if (ret < 0)
 		goto out_unmap;
-	vdev->fbmem = ioremap_nocache(vdev->fbmem_start, vdev->fbmem_len);
+
+	/* try to map less memory on failure, 8 MB should be still enough */
+	for (; vdev->fbmem_len >= 8 << 20; vdev->fbmem_len /= 2) {
+		vdev->fbmem = ioremap_wc(vdev->fbmem_start, vdev->fbmem_len);
+		if (vdev->fbmem)
+			break;
+	}
+
 	if (vdev->fbmem == NULL) {
 		ret = -ENOMEM;
 		goto out_unmap;
diff --git a/drivers/video/via/via_clock.c b/drivers/video/via/via_clock.c
new file mode 100644
index 0000000..af8f26b
--- /dev/null
+++ b/drivers/video/via/via_clock.c
@@ -0,0 +1,349 @@
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+ * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation;
+ * either version 2, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR
+ * A PARTICULAR PURPOSE.See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+/*
+ * clock and PLL management functions
+ */
+
+#include <linux/kernel.h>
+#include <linux/via-core.h>
+#include "via_clock.h"
+#include "global.h"
+#include "debug.h"
+
+const char *via_slap = "Please slap VIA Technologies to motivate them "
+	"releasing full documentation for your platform!\n";
+
+static inline u32 cle266_encode_pll(struct via_pll_config pll)
+{
+	return (pll.multiplier << 8)
+		| (pll.rshift << 6)
+		| pll.divisor;
+}
+
+static inline u32 k800_encode_pll(struct via_pll_config pll)
+{
+	return ((pll.divisor - 2) << 16)
+		| (pll.rshift << 10)
+		| (pll.multiplier - 2);
+}
+
+static inline u32 vx855_encode_pll(struct via_pll_config pll)
+{
+	return (pll.divisor << 16)
+		| (pll.rshift << 10)
+		| pll.multiplier;
+}
+
+static inline void cle266_set_primary_pll_encoded(u32 data)
+{
+	via_write_reg_mask(VIASR, 0x40, 0x02, 0x02); /* enable reset */
+	via_write_reg(VIASR, 0x46, data & 0xFF);
+	via_write_reg(VIASR, 0x47, (data >> 8) & 0xFF);
+	via_write_reg_mask(VIASR, 0x40, 0x00, 0x02); /* disable reset */
+}
+
+static inline void k800_set_primary_pll_encoded(u32 data)
+{
+	via_write_reg_mask(VIASR, 0x40, 0x02, 0x02); /* enable reset */
+	via_write_reg(VIASR, 0x44, data & 0xFF);
+	via_write_reg(VIASR, 0x45, (data >> 8) & 0xFF);
+	via_write_reg(VIASR, 0x46, (data >> 16) & 0xFF);
+	via_write_reg_mask(VIASR, 0x40, 0x00, 0x02); /* disable reset */
+}
+
+static inline void cle266_set_secondary_pll_encoded(u32 data)
+{
+	via_write_reg_mask(VIASR, 0x40, 0x04, 0x04); /* enable reset */
+	via_write_reg(VIASR, 0x44, data & 0xFF);
+	via_write_reg(VIASR, 0x45, (data >> 8) & 0xFF);
+	via_write_reg_mask(VIASR, 0x40, 0x00, 0x04); /* disable reset */
+}
+
+static inline void k800_set_secondary_pll_encoded(u32 data)
+{
+	via_write_reg_mask(VIASR, 0x40, 0x04, 0x04); /* enable reset */
+	via_write_reg(VIASR, 0x4A, data & 0xFF);
+	via_write_reg(VIASR, 0x4B, (data >> 8) & 0xFF);
+	via_write_reg(VIASR, 0x4C, (data >> 16) & 0xFF);
+	via_write_reg_mask(VIASR, 0x40, 0x00, 0x04); /* disable reset */
+}
+
+static inline void set_engine_pll_encoded(u32 data)
+{
+	via_write_reg_mask(VIASR, 0x40, 0x01, 0x01); /* enable reset */
+	via_write_reg(VIASR, 0x47, data & 0xFF);
+	via_write_reg(VIASR, 0x48, (data >> 8) & 0xFF);
+	via_write_reg(VIASR, 0x49, (data >> 16) & 0xFF);
+	via_write_reg_mask(VIASR, 0x40, 0x00, 0x01); /* disable reset */
+}
+
+static void cle266_set_primary_pll(struct via_pll_config config)
+{
+	cle266_set_primary_pll_encoded(cle266_encode_pll(config));
+}
+
+static void k800_set_primary_pll(struct via_pll_config config)
+{
+	k800_set_primary_pll_encoded(k800_encode_pll(config));
+}
+
+static void vx855_set_primary_pll(struct via_pll_config config)
+{
+	k800_set_primary_pll_encoded(vx855_encode_pll(config));
+}
+
+static void cle266_set_secondary_pll(struct via_pll_config config)
+{
+	cle266_set_secondary_pll_encoded(cle266_encode_pll(config));
+}
+
+static void k800_set_secondary_pll(struct via_pll_config config)
+{
+	k800_set_secondary_pll_encoded(k800_encode_pll(config));
+}
+
+static void vx855_set_secondary_pll(struct via_pll_config config)
+{
+	k800_set_secondary_pll_encoded(vx855_encode_pll(config));
+}
+
+static void k800_set_engine_pll(struct via_pll_config config)
+{
+	set_engine_pll_encoded(k800_encode_pll(config));
+}
+
+static void vx855_set_engine_pll(struct via_pll_config config)
+{
+	set_engine_pll_encoded(vx855_encode_pll(config));
+}
+
+static void set_primary_pll_state(u8 state)
+{
+	u8 value;
+
+	switch (state) {
+	case VIA_STATE_ON:
+		value = 0x20;
+		break;
+	case VIA_STATE_OFF:
+		value = 0x00;
+		break;
+	default:
+		return;
+	}
+
+	via_write_reg_mask(VIASR, 0x2D, value, 0x30);
+}
+
+static void set_secondary_pll_state(u8 state)
+{
+	u8 value;
+
+	switch (state) {
+	case VIA_STATE_ON:
+		value = 0x08;
+		break;
+	case VIA_STATE_OFF:
+		value = 0x00;
+		break;
+	default:
+		return;
+	}
+
+	via_write_reg_mask(VIASR, 0x2D, value, 0x0C);
+}
+
+static void set_engine_pll_state(u8 state)
+{
+	u8 value;
+
+	switch (state) {
+	case VIA_STATE_ON:
+		value = 0x02;
+		break;
+	case VIA_STATE_OFF:
+		value = 0x00;
+		break;
+	default:
+		return;
+	}
+
+	via_write_reg_mask(VIASR, 0x2D, value, 0x03);
+}
+
+static void set_primary_clock_state(u8 state)
+{
+	u8 value;
+
+	switch (state) {
+	case VIA_STATE_ON:
+		value = 0x20;
+		break;
+	case VIA_STATE_OFF:
+		value = 0x00;
+		break;
+	default:
+		return;
+	}
+
+	via_write_reg_mask(VIASR, 0x1B, value, 0x30);
+}
+
+static void set_secondary_clock_state(u8 state)
+{
+	u8 value;
+
+	switch (state) {
+	case VIA_STATE_ON:
+		value = 0x80;
+		break;
+	case VIA_STATE_OFF:
+		value = 0x00;
+		break;
+	default:
+		return;
+	}
+
+	via_write_reg_mask(VIASR, 0x1B, value, 0xC0);
+}
+
+static inline u8 set_clock_source_common(enum via_clksrc source, bool use_pll)
+{
+	u8 data = 0;
+
+	switch (source) {
+	case VIA_CLKSRC_X1:
+		data = 0x00;
+		break;
+	case VIA_CLKSRC_TVX1:
+		data = 0x02;
+		break;
+	case VIA_CLKSRC_TVPLL:
+		data = 0x04; /* 0x06 should be the same */
+		break;
+	case VIA_CLKSRC_DVP1TVCLKR:
+		data = 0x0A;
+		break;
+	case VIA_CLKSRC_CAP0:
+		data = 0xC;
+		break;
+	case VIA_CLKSRC_CAP1:
+		data = 0x0E;
+		break;
+	}
+
+	if (!use_pll)
+		data |= 1;
+
+	return data;
+}
+
+static void set_primary_clock_source(enum via_clksrc source, bool use_pll)
+{
+	u8 data = set_clock_source_common(source, use_pll) << 4;
+	via_write_reg_mask(VIACR, 0x6C, data, 0xF0);
+}
+
+static void set_secondary_clock_source(enum via_clksrc source, bool use_pll)
+{
+	u8 data = set_clock_source_common(source, use_pll);
+	via_write_reg_mask(VIACR, 0x6C, data, 0x0F);
+}
+
+static void dummy_set_clock_state(u8 state)
+{
+	printk(KERN_INFO "Using undocumented set clock state.\n%s", via_slap);
+}
+
+static void dummy_set_clock_source(enum via_clksrc source, bool use_pll)
+{
+	printk(KERN_INFO "Using undocumented set clock source.\n%s", via_slap);
+}
+
+static void dummy_set_pll_state(u8 state)
+{
+	printk(KERN_INFO "Using undocumented set PLL state.\n%s", via_slap);
+}
+
+static void dummy_set_pll(struct via_pll_config config)
+{
+	printk(KERN_INFO "Using undocumented set PLL.\n%s", via_slap);
+}
+
+void via_clock_init(struct via_clock *clock, int gfx_chip)
+{
+	switch (gfx_chip) {
+	case UNICHROME_CLE266:
+	case UNICHROME_K400:
+		clock->set_primary_clock_state = dummy_set_clock_state;
+		clock->set_primary_clock_source = dummy_set_clock_source;
+		clock->set_primary_pll_state = dummy_set_pll_state;
+		clock->set_primary_pll = cle266_set_primary_pll;
+
+		clock->set_secondary_clock_state = dummy_set_clock_state;
+		clock->set_secondary_clock_source = dummy_set_clock_source;
+		clock->set_secondary_pll_state = dummy_set_pll_state;
+		clock->set_secondary_pll = cle266_set_secondary_pll;
+
+		clock->set_engine_pll_state = dummy_set_pll_state;
+		clock->set_engine_pll = dummy_set_pll;
+		break;
+	case UNICHROME_K800:
+	case UNICHROME_PM800:
+	case UNICHROME_CN700:
+	case UNICHROME_CX700:
+	case UNICHROME_CN750:
+	case UNICHROME_K8M890:
+	case UNICHROME_P4M890:
+	case UNICHROME_P4M900:
+	case UNICHROME_VX800:
+		clock->set_primary_clock_state = set_primary_clock_state;
+		clock->set_primary_clock_source = set_primary_clock_source;
+		clock->set_primary_pll_state = set_primary_pll_state;
+		clock->set_primary_pll = k800_set_primary_pll;
+
+		clock->set_secondary_clock_state = set_secondary_clock_state;
+		clock->set_secondary_clock_source = set_secondary_clock_source;
+		clock->set_secondary_pll_state = set_secondary_pll_state;
+		clock->set_secondary_pll = k800_set_secondary_pll;
+
+		clock->set_engine_pll_state = set_engine_pll_state;
+		clock->set_engine_pll = k800_set_engine_pll;
+		break;
+	case UNICHROME_VX855:
+	case UNICHROME_VX900:
+		clock->set_primary_clock_state = set_primary_clock_state;
+		clock->set_primary_clock_source = set_primary_clock_source;
+		clock->set_primary_pll_state = set_primary_pll_state;
+		clock->set_primary_pll = vx855_set_primary_pll;
+
+		clock->set_secondary_clock_state = set_secondary_clock_state;
+		clock->set_secondary_clock_source = set_secondary_clock_source;
+		clock->set_secondary_pll_state = set_secondary_pll_state;
+		clock->set_secondary_pll = vx855_set_secondary_pll;
+
+		clock->set_engine_pll_state = set_engine_pll_state;
+		clock->set_engine_pll = vx855_set_engine_pll;
+		break;
+
+	}
+}
diff --git a/drivers/video/via/via_clock.h b/drivers/video/via/via_clock.h
new file mode 100644
index 0000000..88714ae
--- /dev/null
+++ b/drivers/video/via/via_clock.h
@@ -0,0 +1,76 @@
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+ * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation;
+ * either version 2, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR
+ * A PARTICULAR PURPOSE.See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+/*
+ * clock and PLL management functions
+ */
+
+#ifndef __VIA_CLOCK_H__
+#define __VIA_CLOCK_H__
+
+#include <linux/types.h>
+
+enum via_clksrc {
+	VIA_CLKSRC_X1 = 0,
+	VIA_CLKSRC_TVX1,
+	VIA_CLKSRC_TVPLL,
+	VIA_CLKSRC_DVP1TVCLKR,
+	VIA_CLKSRC_CAP0,
+	VIA_CLKSRC_CAP1,
+};
+
+struct via_pll_config {
+	u16 multiplier;
+	u8 divisor;
+	u8 rshift;
+};
+
+struct via_clock {
+	void (*set_primary_clock_state)(u8 state);
+	void (*set_primary_clock_source)(enum via_clksrc src, bool use_pll);
+	void (*set_primary_pll_state)(u8 state);
+	void (*set_primary_pll)(struct via_pll_config config);
+
+	void (*set_secondary_clock_state)(u8 state);
+	void (*set_secondary_clock_source)(enum via_clksrc src, bool use_pll);
+	void (*set_secondary_pll_state)(u8 state);
+	void (*set_secondary_pll)(struct via_pll_config config);
+
+	void (*set_engine_pll_state)(u8 state);
+	void (*set_engine_pll)(struct via_pll_config config);
+};
+
+
+static inline u32 get_pll_internal_frequency(u32 ref_freq,
+	struct via_pll_config pll)
+{
+	return ref_freq / pll.divisor * pll.multiplier;
+}
+
+static inline u32 get_pll_output_frequency(u32 ref_freq,
+	struct via_pll_config pll)
+{
+	return get_pll_internal_frequency(ref_freq, pll) >> pll.rshift;
+}
+
+void via_clock_init(struct via_clock *clock, int gfx_chip);
+
+#endif /* __VIA_CLOCK_H__ */
diff --git a/drivers/video/via/viafbdev.c b/drivers/video/via/viafbdev.c
index a542bed..cf43c80 100644
--- a/drivers/video/via/viafbdev.c
+++ b/drivers/video/via/viafbdev.c
@@ -24,6 +24,7 @@
 #include <linux/slab.h>
 #include <linux/stat.h>
 #include <linux/via-core.h>
+#include <asm/olpc.h>
 
 #define _MASTER_FILE
 #include "global.h"
@@ -37,6 +38,8 @@ static char *viafb_mode1;
 static int viafb_bpp = 32;
 static int viafb_bpp1 = 32;
 
+static unsigned int viafb_second_xres = 640;
+static unsigned int viafb_second_yres = 480;
 static unsigned int viafb_second_offset;
 static int viafb_second_size;
 
@@ -440,8 +443,8 @@ static int viafb_ioctl(struct fb_info *info, u_int cmd, u_long arg)
 		if (viafb_SAMM_ON == 1) {
 			u.viamode.xres_sec = viafb_second_xres;
 			u.viamode.yres_sec = viafb_second_yres;
-			u.viamode.virtual_xres_sec = viafb_second_virtual_xres;
-			u.viamode.virtual_yres_sec = viafb_second_virtual_yres;
+			u.viamode.virtual_xres_sec = viafb_dual_fb ? viafbinfo1->var.xres_virtual : viafbinfo->var.xres_virtual;
+			u.viamode.virtual_yres_sec = viafb_dual_fb ? viafbinfo1->var.yres_virtual : viafbinfo->var.yres_virtual;
 			u.viamode.refresh_sec = viafb_refresh1;
 			u.viamode.bpp_sec = viafb_bpp1;
 		} else {
@@ -930,10 +933,8 @@ static int get_primary_device(void)
 	/* Rule: device on iga1 path are the primary device. */
 	if (viafb_SAMM_ON) {
 		if (viafb_CRT_ON) {
-			if (viaparinfo->crt_setting_info->iga_path == IGA1) {
-				DEBUG_MSG(KERN_INFO "CRT IGA Path:%d\n",
-					viaparinfo->
-					crt_setting_info->iga_path);
+			if (viaparinfo->shared->iga1_devices & VIA_CRT) {
+				DEBUG_MSG(KERN_INFO "CRT IGA Path:%d\n", IGA1);
 				primary_device = CRT_Device;
 			}
 		}
@@ -1011,8 +1012,13 @@ static int __init parse_active_dev(void)
 	/*    Note: The previous of active_dev is primary device,
 	   and the following is secondary device. */
 	if (!viafb_active_dev) {
-		viafb_CRT_ON = STATE_ON;
-		viafb_SAMM_ON = STATE_OFF;
+		if (machine_is_olpc()) { /* LCD only */
+			viafb_LCD_ON = STATE_ON;
+			viafb_SAMM_ON = STATE_OFF;
+		} else {
+			viafb_CRT_ON = STATE_ON;
+			viafb_SAMM_ON = STATE_OFF;
+		}
 	} else if (!strcmp(viafb_active_dev, "CRT+DVI")) {
 		/* CRT+DVI */
 		viafb_CRT_ON = STATE_ON;
@@ -1665,8 +1671,13 @@ static int parse_mode(const char *str, u32 *xres, u32 *yres)
 	char *ptr;
 
 	if (!str) {
-		*xres = 640;
-		*yres = 480;
+		if (machine_is_olpc()) {
+			*xres = 1200;
+			*yres = 900;
+		} else {
+			*xres = 640;
+			*yres = 480;
+		}
 		return 0;
 	}
 
@@ -1746,7 +1757,6 @@ int __devinit via_fb_pci_probe(struct viafb_dev *vdev)
 	viaparinfo->lvds_setting_info = &viaparinfo->shared->lvds_setting_info;
 	viaparinfo->lvds_setting_info2 =
 		&viaparinfo->shared->lvds_setting_info2;
-	viaparinfo->crt_setting_info = &viaparinfo->shared->crt_setting_info;
 	viaparinfo->chip_info = &viaparinfo->shared->chip_info;
 
 	if (viafb_dual_fb)
@@ -1793,14 +1803,10 @@ int __devinit via_fb_pci_probe(struct viafb_dev *vdev)
 
 	parse_mode(viafb_mode, &default_xres, &default_yres);
 	vmode_entry = viafb_get_mode(default_xres, default_yres);
-	if (viafb_SAMM_ON == 1) {
+	if (viafb_SAMM_ON == 1)
 		parse_mode(viafb_mode1, &viafb_second_xres,
 			&viafb_second_yres);
 
-		viafb_second_virtual_xres = viafb_second_xres;
-		viafb_second_virtual_yres = viafb_second_yres;
-	}
-
 	default_var.xres = default_xres;
 	default_var.yres = default_yres;
 	default_var.xres_virtual = default_xres;
@@ -1844,8 +1850,8 @@ int __devinit via_fb_pci_probe(struct viafb_dev *vdev)
 
 		default_var.xres = viafb_second_xres;
 		default_var.yres = viafb_second_yres;
-		default_var.xres_virtual = viafb_second_virtual_xres;
-		default_var.yres_virtual = viafb_second_virtual_yres;
+		default_var.xres_virtual = viafb_second_xres;
+		default_var.yres_virtual = viafb_second_yres;
 		default_var.bits_per_pixel = viafb_bpp1;
 		viafb_fill_var_timing_info(&default_var, viafb_get_refresh(
 			default_var.xres, default_var.yres, viafb_refresh1),
@@ -1927,11 +1933,16 @@ void __devexit via_fb_pci_remove(struct pci_dev *pdev)
 }
 
 #ifndef MODULE
-static int __init viafb_setup(char *options)
+static int __init viafb_setup(void)
 {
 	char *this_opt;
+	char *options;
+
 	DEBUG_MSG(KERN_INFO "viafb_setup!\n");
 
+	if (fb_get_options("viafb", &options))
+		return -ENODEV;
+
 	if (!options || !*options)
 		return 0;
 
@@ -2005,11 +2016,16 @@ static int __init viafb_setup(char *options)
 int __init viafb_init(void)
 {
 	u32 dummy_x, dummy_y;
+	int r;
+
+	if (machine_is_olpc())
+		/* Apply XO-1.5-specific configuration. */
+		viafb_lcd_panel_id = 23;
+
 #ifndef MODULE
-	char *option = NULL;
-	if (fb_get_options("viafb", &option))
-		return -ENODEV;
-	viafb_setup(option);
+	r = viafb_setup();
+	if (r < 0)
+		return r;
 #endif
 	if (parse_mode(viafb_mode, &dummy_x, &dummy_y)
 		|| !viafb_get_mode(dummy_x, dummy_y)
diff --git a/drivers/video/via/viafbdev.h b/drivers/video/via/viafbdev.h
index 137996d..d944063 100644
--- a/drivers/video/via/viafbdev.h
+++ b/drivers/video/via/viafbdev.h
@@ -50,7 +50,6 @@ struct viafb_shared {
 
 	/* All the information will be needed to set engine */
 	struct tmds_setting_information tmds_setting_info;
-	struct crt_setting_information crt_setting_info;
 	struct lvds_setting_information lvds_setting_info;
 	struct lvds_setting_information lvds_setting_info2;
 	struct chip_information chip_info;
@@ -79,14 +78,11 @@ struct viafb_par {
 	/* All the information will be needed to set engine */
 	/* depreciated, use the ones in shared directly */
 	struct tmds_setting_information *tmds_setting_info;
-	struct crt_setting_information *crt_setting_info;
 	struct lvds_setting_information *lvds_setting_info;
 	struct lvds_setting_information *lvds_setting_info2;
 	struct chip_information *chip_info;
 };
 
-extern unsigned int viafb_second_virtual_yres;
-extern unsigned int viafb_second_virtual_xres;
 extern int viafb_SAMM_ON;
 extern int viafb_dual_fb;
 extern int viafb_LCD2_ON;
diff --git a/drivers/video/via/viamode.c b/drivers/video/via/viamode.c
index 8c5bc41..58df74e 100644
--- a/drivers/video/via/viamode.c
+++ b/drivers/video/via/viamode.c
@@ -30,10 +30,6 @@ struct io_reg CN400_ModeXregs[] = { {VIASR, SR10, 0xFF, 0x01},
 {VIASR, SR1A, 0xFB, 0x08},
 {VIASR, SR1E, 0x0F, 0x01},
 {VIASR, SR2A, 0xFF, 0x00},
-{VIACR, CR0A, 0xFF, 0x1E},	/* Cursor Start                        */
-{VIACR, CR0B, 0xFF, 0x00},	/* Cursor End                          */
-{VIACR, CR0E, 0xFF, 0x00},	/* Cursor Location High                */
-{VIACR, CR0F, 0xFF, 0x00},	/* Cursor Localtion Low                */
 {VIACR, CR32, 0xFF, 0x00},
 {VIACR, CR33, 0xFF, 0x00},
 {VIACR, CR35, 0xFF, 0x00},
@@ -41,7 +37,6 @@ struct io_reg CN400_ModeXregs[] = { {VIASR, SR10, 0xFF, 0x01},
 {VIACR, CR69, 0xFF, 0x00},
 {VIACR, CR6A, 0xFF, 0x40},
 {VIACR, CR6B, 0xFF, 0x00},
-{VIACR, CR6C, 0xFF, 0x00},
 {VIACR, CR88, 0xFF, 0x40},	/* LCD Panel Type                      */
 {VIACR, CR89, 0xFF, 0x00},	/* LCD Timing Control 0                */
 {VIACR, CR8A, 0xFF, 0x88},	/* LCD Timing Control 1                */
@@ -87,7 +82,6 @@ struct io_reg CN700_ModeXregs[] = { {VIASR, SR10, 0xFF, 0x01},
 {VIACR, CR69, 0xFF, 0x00},
 {VIACR, CR6A, 0xFD, 0x40},
 {VIACR, CR6B, 0xFF, 0x00},
-{VIACR, CR6C, 0xFF, 0x00},
 {VIACR, CR77, 0xFF, 0x00},	/* LCD scaling Factor */
 {VIACR, CR78, 0xFF, 0x00},	/* LCD scaling Factor */
 {VIACR, CR79, 0xFF, 0x00},	/* LCD scaling Factor */
@@ -125,10 +119,6 @@ struct io_reg KM400_ModeXregs[] = {
 	{VIASR, SR2A, 0xFF, 0x00},	/* Power Management Control 5      */
 	{VIASR, SR2D, 0xFF, 0xFF},	/* Power Management Control 1      */
 	{VIASR, SR2E, 0xFF, 0xFF},	/* Power Management Control 2      */
-	{VIACR, CR0A, 0xFF, 0x1E},	/* Cursor Start                    */
-	{VIACR, CR0B, 0xFF, 0x00},	/* Cursor End                      */
-	{VIACR, CR0E, 0xFF, 0x00},	/* Cursor Location High            */
-	{VIACR, CR0F, 0xFF, 0x00},	/* Cursor Localtion Low            */
 	{VIACR, CR33, 0xFF, 0x00},
 	{VIACR, CR55, 0x80, 0x00},
 	{VIACR, CR5D, 0x80, 0x00},
@@ -161,11 +151,7 @@ struct io_reg CX700_ModeXregs[] = { {VIASR, SR10, 0xFF, 0x01},
 {VIASR, SR1B, 0xFF, 0xF0},
 {VIASR, SR1E, 0xFF, 0x01},
 {VIASR, SR2A, 0xFF, 0x00},
-{VIASR, SR2D, 0xFF, 0xFF},	/* VCK and LCK PLL power on.           */
-{VIACR, CR0A, 0xFF, 0x1E},	/* Cursor Start                        */
-{VIACR, CR0B, 0xFF, 0x00},	/* Cursor End                          */
-{VIACR, CR0E, 0xFF, 0x00},	/* Cursor Location High                */
-{VIACR, CR0F, 0xFF, 0x00},	/* Cursor Localtion Low                */
+{VIASR, SR2D, 0xC0, 0xC0},	/* delayed E3_ECK */
 {VIACR, CR32, 0xFF, 0x00},
 {VIACR, CR33, 0xFF, 0x00},
 {VIACR, CR35, 0xFF, 0x00},
@@ -174,7 +160,6 @@ struct io_reg CX700_ModeXregs[] = { {VIASR, SR10, 0xFF, 0x01},
 {VIACR, CR69, 0xFF, 0x00},
 {VIACR, CR6A, 0xFF, 0x40},
 {VIACR, CR6B, 0xFF, 0x00},
-{VIACR, CR6C, 0xFF, 0x00},
 {VIACR, CR88, 0xFF, 0x40},	/* LCD Panel Type                      */
 {VIACR, CR89, 0xFF, 0x00},	/* LCD Timing Control 0                */
 {VIACR, CR8A, 0xFF, 0x88},	/* LCD Timing Control 1                */
@@ -204,14 +189,7 @@ struct io_reg VX855_ModeXregs[] = {
 {VIASR, SR2A, 0xF0, 0x00},
 {VIASR, SR58, 0xFF, 0x00},
 {VIASR, SR59, 0xFF, 0x00},
-{VIASR, SR2D, 0xFF, 0xFF},	/* VCK and LCK PLL power on.           */
-{VIACR, CR09, 0xFF, 0x00},	/* Initial CR09=0*/
-{VIACR, CR11, 0x8F, 0x00},	/* IGA1 initial  Vertical end       */
-{VIACR, CR17, 0x7F, 0x00}, 	/* IGA1 CRT Mode control init   */
-{VIACR, CR0A, 0xFF, 0x1E},	/* Cursor Start                        */
-{VIACR, CR0B, 0xFF, 0x00},	/* Cursor End                          */
-{VIACR, CR0E, 0xFF, 0x00},	/* Cursor Location High                */
-{VIACR, CR0F, 0xFF, 0x00},	/* Cursor Localtion Low                */
+{VIASR, SR2D, 0xC0, 0xC0},	/* delayed E3_ECK */
 {VIACR, CR32, 0xFF, 0x00},
 {VIACR, CR33, 0x7F, 0x00},
 {VIACR, CR35, 0xFF, 0x00},
@@ -219,7 +197,6 @@ struct io_reg VX855_ModeXregs[] = {
 {VIACR, CR69, 0xFF, 0x00},
 {VIACR, CR6A, 0xFD, 0x60},
 {VIACR, CR6B, 0xFF, 0x00},
-{VIACR, CR6C, 0xFF, 0x00},
 {VIACR, CR88, 0xFF, 0x40},          /* LCD Panel Type                      */
 {VIACR, CR89, 0xFF, 0x00},          /* LCD Timing Control 0                */
 {VIACR, CR8A, 0xFF, 0x88},          /* LCD Timing Control 1                */
@@ -606,7 +583,7 @@ static struct crt_mode_table CRTM1200x720[] = {
 /* 1200x900 (DCON) */
 static struct crt_mode_table DCON1200x900[] = {
 	/* r_rate,               hsp,               vsp   */
-	{REFRESH_60, M1200X900_R60_HSP, M1200X900_R60_VSP,
+	{REFRESH_49, M1200X900_R60_HSP, M1200X900_R60_VSP,
 	/* The correct htotal is 1240, but this doesn't raster on VX855. */
 	/* Via suggested changing to a multiple of 16, hence 1264.       */
 	/*  HT,   HA,  HBS, HBE,  HSS, HSE,  VT,  VA, VBS, VBE, VSS, VSE */
@@ -877,23 +854,6 @@ static struct VideoModeTable viafb_rb_modes[] = {
 	{CRTM1920x1200_RB, ARRAY_SIZE(CRTM1920x1200_RB)}
 };
 
-struct crt_mode_table CEAM1280x720[] = {
-	{REFRESH_60, M1280X720_CEA_R60_HSP, M1280X720_CEA_R60_VSP,
-	 /* HT,    HA,   HBS,  HBE,  HSS, HSE,  VT,   VA,  VBS, VBE, VSS, VSE */
-	 {1650, 1280, 1280, 370, 1390, 40, 750, 720, 720, 30, 725, 5} }
-};
-struct crt_mode_table CEAM1920x1080[] = {
-	{REFRESH_60, M1920X1080_CEA_R60_HSP, M1920X1080_CEA_R60_VSP,
-	 /* HT,    HA,   HBS,  HBE,  HSS, HSE,  VT,  VA, VBS, VBE,  VSS, VSE */
-	 {2200, 1920, 1920, 300, 2008, 44, 1125, 1080, 1080, 45, 1084, 5} }
-};
-struct VideoModeTable CEA_HDMI_Modes[] = {
-	/* Display : 1280x720 */
-	{CEAM1280x720, ARRAY_SIZE(CEAM1280x720)},
-	{CEAM1920x1080, ARRAY_SIZE(CEAM1920x1080)}
-};
-
-int NUM_TOTAL_CEA_MODES = ARRAY_SIZE(CEA_HDMI_Modes);
 int NUM_TOTAL_CN400_ModeXregs = ARRAY_SIZE(CN400_ModeXregs);
 int NUM_TOTAL_CN700_ModeXregs = ARRAY_SIZE(CN700_ModeXregs);
 int NUM_TOTAL_KM400_ModeXregs = ARRAY_SIZE(KM400_ModeXregs);
diff --git a/drivers/video/via/viamode.h b/drivers/video/via/viamode.h
index 8a67ea1..3751289 100644
--- a/drivers/video/via/viamode.h
+++ b/drivers/video/via/viamode.h
@@ -41,7 +41,6 @@ struct patch_table {
 	struct io_reg *io_reg_table;
 };
 
-extern int NUM_TOTAL_CEA_MODES;
 extern int NUM_TOTAL_CN400_ModeXregs;
 extern int NUM_TOTAL_CN700_ModeXregs;
 extern int NUM_TOTAL_KM400_ModeXregs;
@@ -50,14 +49,6 @@ extern int NUM_TOTAL_VX855_ModeXregs;
 extern int NUM_TOTAL_CLE266_ModeXregs;
 extern int NUM_TOTAL_PATCH_MODE;
 
-/********************/
-/* Mode Table       */
-/********************/
-
-extern struct crt_mode_table CEAM1280x720[];
-extern struct crt_mode_table CEAM1920x1080[];
-extern struct VideoModeTable CEA_HDMI_Modes[];
-
 extern struct io_reg CN400_ModeXregs[];
 extern struct io_reg CN700_ModeXregs[];
 extern struct io_reg KM400_ModeXregs[];