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@suse.com --- 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)