diff --git a/drivers/gdisp/SSD1289/gdisp_lld_config.h b/drivers/gdisp/SSD1289/gdisp_lld_config.h
index f8743a2b..84e518d2 100644
--- a/drivers/gdisp/SSD1289/gdisp_lld_config.h
+++ b/drivers/gdisp/SSD1289/gdisp_lld_config.h
@@ -24,7 +24,7 @@
 
 #define GDISP_HARDWARE_STREAM_WRITE		TRUE
 #define GDISP_HARDWARE_STREAM_READ		TRUE
-//#define GDISP_HARDWARE_STREAM_POS		TRUE
+#define GDISP_HARDWARE_STREAM_POS		TRUE
 #define GDISP_HARDWARE_CONTROL			TRUE
 
 #if defined(GDISP_USE_DMA)
diff --git a/src/gdisp/gdisp.c b/src/gdisp/gdisp.c
index 53882492..3d2e6e36 100644
--- a/src/gdisp/gdisp.c
+++ b/src/gdisp/gdisp.c
@@ -87,6 +87,7 @@ GDisplay	*GDISP = GDisplayArray;
 	static INLINE void setglobalwindow(GDisplay *g) {
 		coord_t	x, y;
 		x = g->p.x; y = g->p.y;
+		g->p.x = g->p.y = 0;
 		g->p.cx = g->g.Width; g->p.cy = g->g.Height;
 		gdisp_lld_write_start(g);
 		g->p.x = x; g->p.y = y;
@@ -304,8 +305,9 @@ static void hline_clip(GDisplay *g) {
 		{
 			if (!(g->flags & GDISP_FLG_SCRSTREAM))
 				setglobalwindow(g);
+			g->p.cx = g->p.x1 - g->p.x + 1;
 			gdisp_lld_write_pos(g);
-			do { gdisp_lld_write_color(g); } while(g->p.cx--);
+			do { gdisp_lld_write_color(g); } while(--g->p.cx);
 			return;
 		}
 	#endif
@@ -319,7 +321,7 @@ static void hline_clip(GDisplay *g) {
 			g->p.cx = g->p.x1 - g->p.x + 1;
 			g->p.cy = 1;
 			gdisp_lld_write_start(g);
-			do { gdisp_lld_write_color(g); } while(g->p.cx--);
+			do { gdisp_lld_write_color(g); } while(--g->p.cx);
 			gdisp_lld_write_stop(g);
 			return;
 		}
@@ -404,7 +406,7 @@ static void vline_clip(GDisplay *g) {
 				#endif
 				gdisp_lld_write_pos(g);
 			#endif
-			do { gdisp_lld_write_color(g); } while(g->p.cy--);
+			do { gdisp_lld_write_color(g); } while(--g->p.cy);
 			gdisp_lld_write_stop(g);
 			return;
 		}