[PATCH] tgafb: sync-on-green support fixes

This sets up the deep register of the TGA ASIC as well as the blank pedestal
of the Bt463 RAMDAC correctly for the sync-on-green mode.
Signed-off-by: NMaciej W. Rozycki <macro@linux-mips.org>
Cc: James Simmons <jsimmons@infradead.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/video/tgafb.c

@@ -197,7 +197,9 @@ tgafb_set_par(struct fb_info *info)
 	while (TGA_READ_REG(par, TGA_CMD_STAT_REG) & 1) /* wait for not busy */
 		continue;
 	mb();
-	TGA_WRITE_REG(par, deep_presets[tga_type], TGA_DEEP_REG);
+	TGA_WRITE_REG(par, deep_presets[tga_type] |
+			   (par->sync_on_green ? 0x0 : 0x00010000),
+		      TGA_DEEP_REG);
 	while (TGA_READ_REG(par, TGA_CMD_STAT_REG) & 1) /* wait for not busy */
 		continue;
 	mb();
@@ -261,11 +263,11 @@ tgafb_set_par(struct fb_info *info)
 
 	} else { /* 24-plane or 24plusZ */
 
-		/* Init BT463 registers.  */
+		/* Init BT463 RAMDAC registers.  */
 		BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_0, 0x40);
 		BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_1, 0x08);
 		BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_2,
-			    (par->sync_on_green ? 0x80 : 0x40));
+			    (par->sync_on_green ? 0xc0 : 0x40));
 
 		BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_0, 0xff);
 		BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_1, 0xff);