Matrox hardware only supports modes whose horizontal parameters are
multiples of 8. This rules out a mode like 1366x768 for example.
Signed-off-by: Egbert Eich <eich@xxxxxxxx>
---
drivers/gpu/drm/mgag200/mgag200_mode.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
index 503a414..0bb0e1e 100644
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -1491,6 +1491,10 @@ static int mga_vga_mode_valid(struct drm_connector *connector,
int bpp = 32;
int i = 0;
+ if (mode->hdisplay % 8 || mode->hsync_start % 8 ||
+ mode->hsync_end % 8 || mode->htotal % 8)
+ return MODE_H_ILLEGAL;
+
if (IS_G200_SE(mdev)) {
if (mdev->unique_rev_id == 0x01) {
if (mode->hdisplay > 1600)
--
1.8.1.4
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