s3fb: implement fb_get_caps

Implement fb_get_caps().  This will allow the driver to tell upper layer that
it can only support 256 8x16 bitmaps when in tileblitting mode
(var->bits_per_pixel == 0);

Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/s3fb.c

@@ -799,6 +799,23 @@ static int s3fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 	return 0;
 }
 
+/* Get capabilities of accelerator based on the mode */
+
+static void s3fb_get_caps(struct fb_info *info, struct fb_blit_caps *caps,
+			  struct fb_var_screeninfo *var)
+{
+	if (var->bits_per_pixel == 0) {
+		/* can only support 256 8x16 bitmap */
+		caps->x = 1 << (8 - 1);
+		caps->y = 1 << (16 - 1);
+		caps->len = 256;
+	} else {
+		caps->x = ~(u32)0;
+		caps->y = ~(u32)0;
+		caps->len = ~(u32)0;
+	}
+}
+
 /* ------------------------------------------------------------------------- */
 
 /* Frame buffer operations */
@@ -815,6 +832,7 @@ static struct fb_ops s3fb_ops = {
 	.fb_fillrect	= s3fb_fillrect,
 	.fb_copyarea	= cfb_copyarea,
 	.fb_imageblit	= s3fb_imageblit,
+	.fb_get_caps    = s3fb_get_caps,
 };
 
 /* ------------------------------------------------------------------------- */