cirrusfb: fix threshold register mask for Laguna chips

Fix threshold register mask for Laguna chips otherwise some 8bpp modes are
garbled after selecting a 24bpp mode.

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/video/cirrusfb.c b/drivers/video/cirrusfb.c
index a364e1b..9bb811d 100644 (file)
--- a/drivers/video/cirrusfb.c
+++ b/drivers/video/cirrusfb.c
@@ -875,7 +875,7 @@ static int cirrusfb_set_par_foo(struct fb_info *info)
                threshold = fb_readw(cinfo->laguna_mmio + 0xea);
                control &= ~0x6800;
                format = 0;
-               threshold &= 0xffe0 & 0x3fbf;
+               threshold &= 0xffc0 & 0x3fbf;
        }
        if (nom) {
                tmp = den << 1;