s3fb: updates

Move s3fb_get_tilemax to svgalib.c as svga_get_tilemax, because it reports
limitation of other code from svgalib (svga_settile, svga_tilecopy, ...)

Limit font width to 8 pixels in 4 bpp mode.

Signed-off-by: Ondrej Zajicek <santiago@crfreenet.org>
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

@@ -183,18 +183,13 @@ static void s3fb_settile_fast(struct fb_info *info, struct fb_tilemap *map)
 	}
 }
 
-static int s3fb_get_tilemax(struct fb_info *info)
-{
-	return 256;
-}
-
 static struct fb_tile_ops s3fb_tile_ops = {
 	.fb_settile	= svga_settile,
 	.fb_tilecopy	= svga_tilecopy,
 	.fb_tilefill    = svga_tilefill,
 	.fb_tileblit    = svga_tileblit,
 	.fb_tilecursor  = svga_tilecursor,
-	.fb_get_tilemax = s3fb_get_tilemax,
+	.fb_get_tilemax = svga_get_tilemax,
 };
 
 static struct fb_tile_ops s3fb_fast_tile_ops = {
@@ -203,7 +198,7 @@ static struct fb_tile_ops s3fb_fast_tile_ops = {
 	.fb_tilefill    = svga_tilefill,
 	.fb_tileblit    = svga_tileblit,
 	.fb_tilecursor  = svga_tilecursor,
-	.fb_get_tilemax = s3fb_get_tilemax,
+	.fb_get_tilemax = svga_get_tilemax,
 };
 
 
@@ -459,9 +454,10 @@ static int s3fb_set_par(struct fb_info *info)
 		info->flags &= ~FBINFO_MISC_TILEBLITTING;
 		info->tileops = NULL;
 
-		/* supports blit rectangles of any dimension */
-		info->pixmap.blit_x = ~(u32)0;
+		/* in 4bpp supports 8p wide tiles only, any tiles otherwise */
+		info->pixmap.blit_x = (bpp == 4) ? (1 << (8 - 1)) : (~(u32)0);
 		info->pixmap.blit_y = ~(u32)0;
+
 		offset_value = (info->var.xres_virtual * bpp) / 64;
 		screen_size = info->var.yres_virtual * info->fix.line_length;
 	} else {
@@ -470,6 +466,7 @@ static int s3fb_set_par(struct fb_info *info)
 
 		info->flags |= FBINFO_MISC_TILEBLITTING;
 		info->tileops = fasttext ? &s3fb_fast_tile_ops : &s3fb_tile_ops;
+
 		/* supports 8x16 tiles only */
 		info->pixmap.blit_x = 1 << (8 - 1);
 		info->pixmap.blit_y = 1 << (16 - 1);

drivers/video/svgalib.c

@@ -342,6 +342,11 @@ void svga_tilecursor(struct fb_info *info, struct fb_tilecursor *cursor)
 	vga_wcrt(NULL, 0x0A, cs); /* set cursor start and enable it */
 }
 
+int svga_get_tilemax(struct fb_info *info)
+{
+	return 256;
+}
+
 
 /* ------------------------------------------------------------------------- */
 
@@ -623,6 +628,7 @@ EXPORT_SYMBOL(svga_tilecopy);
 EXPORT_SYMBOL(svga_tilefill);
 EXPORT_SYMBOL(svga_tileblit);
 EXPORT_SYMBOL(svga_tilecursor);
+EXPORT_SYMBOL(svga_get_tilemax);
 
 EXPORT_SYMBOL(svga_compute_pll);
 EXPORT_SYMBOL(svga_check_timings);

include/linux/svga.h

@@ -112,6 +112,7 @@ void svga_tilecopy(struct fb_info *info, struct fb_tilearea *area);
 void svga_tilefill(struct fb_info *info, struct fb_tilerect *rect);
 void svga_tileblit(struct fb_info *info, struct fb_tileblit *blit);
 void svga_tilecursor(struct fb_info *info, struct fb_tilecursor *cursor);
+int svga_get_tilemax(struct fb_info *info);
 
 int svga_compute_pll(const struct svga_pll *pll, u32 f_wanted, u16 *m, u16 *n, u16 *r, int node);
 int svga_check_timings(const struct svga_timing_regs *tm, struct fb_var_screeninfo *var, int node);