fbdev: stifb: Fall back to cfb_fillrect() on 32-bit HCRX cards

[ Upstream commit 776d875fd4 ]

When the text console is scrolling text upwards it calls the fillrect()
function to empty the new line. The current implementation doesn't seem
to work correctly on HCRX cards in 32-bit mode and leave garbage in that
line instead. Fix it by falling back to standard cfb_fillrect() in that
case.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/video/fbdev/stifb.c

@@ -1055,7 +1055,8 @@ stifb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 {
 	struct stifb_info *fb = container_of(info, struct stifb_info, info);
 
-	if (rect->rop != ROP_COPY)
+	if (rect->rop != ROP_COPY ||
+	    (fb->id == S9000_ID_HCRX && fb->info.var.bits_per_pixel == 32))
 		return cfb_fillrect(info, rect);
 
 	SETUP_HW(fb);