drm/cirrus: correct register values for 16bpp

commit 2510538fa000dd13a3e57b79bf073ffb1748976c upstream.

When the mode is set with 16bpp on QEMU, the output gets totally broken.
The culprit is the bogus register values set for 16bpp, which was likely
copied from from a wrong place.

Addresses https://bugzilla.novell.com/show_bug.cgi?id=799216

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: David Airlie <airlied@linux.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/cirrus/cirrus_mode.c b/drivers/gpu/drm/cirrus/cirrus_mode.c
index adabc3daaa5b4f644969944a28de07921ab1895d..3592616d484b75e0cb3934ffa97090f8a6532e83 100644 (file)
--- a/drivers/gpu/drm/cirrus/cirrus_mode.c
+++ b/drivers/gpu/drm/cirrus/cirrus_mode.c
@@ -273,8 +273,8 @@ static int cirrus_crtc_mode_set(struct drm_crtc *crtc,
                sr07 |= 0x11;
                break;
        case 16:
-               sr07 |= 0xc1;
-               hdr = 0xc0;
+               sr07 |= 0x17;
+               hdr = 0xc1;
                break;
        case 24:
                sr07 |= 0x15;