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authorAdam Jackson <ajax@redhat.com>2015-06-15 23:16:15 +0300
committerDave Airlie <airlied@redhat.com>2015-06-16 03:01:16 +0300
commit25161084b1c1b0c29948f6f77266a35f302196b7 (patch)
tree76e755c8b3b838316691289f8e297f6680471bea
parent0f57d86787d8b1076ea8f9cbdddda2a46d534a27 (diff)
downloadlinux-25161084b1c1b0c29948f6f77266a35f302196b7.tar.xz
drm/mgag200: Reject non-character-cell-aligned mode widths
Turns out 1366x768 does not in fact work on this hardware. Signed-off-by: Adam Jackson <ajax@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
-rw-r--r--drivers/gpu/drm/mgag200/mgag200_mode.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
index 6e84df9369a6..ad4b9010dfb0 100644
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -1526,6 +1526,11 @@ static int mga_vga_mode_valid(struct drm_connector *connector,
return MODE_BANDWIDTH;
}
+ if ((mode->hdisplay % 8) != 0 || (mode->hsync_start % 8) != 0 ||
+ (mode->hsync_end % 8) != 0 || (mode->htotal % 8) != 0) {
+ return MODE_H_ILLEGAL;
+ }
+
if (mode->crtc_hdisplay > 2048 || mode->crtc_hsync_start > 4096 ||
mode->crtc_hsync_end > 4096 || mode->crtc_htotal > 4096 ||
mode->crtc_vdisplay > 2048 || mode->crtc_vsync_start > 4096 ||