OMAP: DSS2: OMAPFB: Remove implicit display update on unblank

Currently omapfb does an implicit display update (for manual update
displays) on unblank.

There is no guarantee that the framebuffer contains a valid image when
unblank is called. When using manual update displays it is the
responsibility of the user space to update the display, and so it should
be in this case also.

This patch removes the implicit display update on unblank.
Signed-off-by: Jani Nikula <ext-jani.1.nikula@nokia.com>
[tomi.valkeinen@ti.com: improved description]
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/omap2/omapfb/omapfb-main.c

@@ -1271,7 +1271,6 @@ static int omapfb_blank(int blank, struct fb_info *fbi)
 	struct omapfb_info *ofbi = FB2OFB(fbi);
 	struct omapfb2_device *fbdev = ofbi->fbdev;
 	struct omap_dss_device *display = fb2display(fbi);
-	int do_update = 0;
 	int r = 0;
 
 	if (!display)
@@ -1287,11 +1286,6 @@ static int omapfb_blank(int blank, struct fb_info *fbi)
 		if (display->driver->resume)
 			r = display->driver->resume(display);
 
-		if (r == 0 && display->driver->get_update_mode &&
-				display->driver->get_update_mode(display) ==
-				OMAP_DSS_UPDATE_MANUAL)
-			do_update = 1;
-
 		break;
 
 	case FB_BLANK_NORMAL:
@@ -1315,13 +1309,6 @@ static int omapfb_blank(int blank, struct fb_info *fbi)
 exit:
 	omapfb_unlock(fbdev);
 
-	if (r == 0 && do_update && display->driver->update) {
-		u16 w, h;
-		display->driver->get_resolution(display, &w, &h);
-
-		r = display->driver->update(display, 0, 0, w, h);
-	}
-
 	return r;
 }