staging: xgifb: refactor XGI_BridgeIsOn()

Refactor XGI_BridgeIsOn(). IF_DEF_LVDS bit is not valid for < XG20 chips.
Also we can make the function static by moving it to vb_init.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/xgifb/vb_init.c

@@ -1185,6 +1185,14 @@ static unsigned char GetXG27FPBits(struct vb_device_info *pVBInfo)
 	return temp;
 }
 
+static bool xgifb_bridge_is_on(struct vb_device_info *vb_info)
+{
+	u8 flag;
+
+	flag = xgifb_reg_get(vb_info->Part4Port, 0x00);
+	return flag == 1 || flag == 2;
+}
+
 unsigned char XGIInitNew(struct pci_dev *pdev)
 {
 	struct xgifb_video_info *xgifb_info = pci_get_drvdata(pdev);
@@ -1321,7 +1329,7 @@ unsigned char XGIInitNew(struct pci_dev *pdev)
 	xgifb_reg_set(pVBInfo->P3c4, 0x33, XGI330_SR33);
 
 	if (HwDeviceExtension->jChipType < XG20) {
-		if (XGI_BridgeIsOn(pVBInfo) == 1) {
+		if (xgifb_bridge_is_on(pVBInfo)) {
 			xgifb_reg_set(pVBInfo->Part2Port, 0x00, 0x1C);
 			xgifb_reg_set(pVBInfo->Part4Port,
 				      0x0D, XGI330_CRT2Data_4_D);

drivers/staging/xgifb/vb_setmode.c

@@ -5290,21 +5290,6 @@ void XGI_LockCRT2(struct xgi_hw_device_info *HwDeviceExtension,
 
 }
 
-unsigned char XGI_BridgeIsOn(struct vb_device_info *pVBInfo)
-{
-	unsigned short flag;
-
-	if (pVBInfo->IF_DEF_LVDS == 1) {
-		return 1;
-	} else {
-		flag = xgifb_reg_get(pVBInfo->Part4Port, 0x00);
-		if ((flag == 1) || (flag == 2))
-			return 1; /* 301b */
-		else
-			return 0;
-	}
-}
-
 unsigned short XGI_GetRatePtrCRT2(struct xgi_hw_device_info *pXGIHWDE,
 		unsigned short ModeNo, unsigned short ModeIdIndex,
 		struct vb_device_info *pVBInfo)

drivers/staging/xgifb/vb_setmode.h

@@ -18,7 +18,6 @@ extern unsigned char XGISetModeNew(struct xgifb_video_info *xgifb_info,
 extern unsigned char XGI_SearchModeID(unsigned short ModeNo,
 				      unsigned short *ModeIdIndex,
 				      struct vb_device_info *);
-extern unsigned char XGI_BridgeIsOn(struct vb_device_info *);
 extern unsigned short XGI_GetRatePtrCRT2(struct xgi_hw_device_info *pXGIHWDE,
 					 unsigned short ModeNo,
 					 unsigned short ModeIdIndex,