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drm/mgag200: Reject non-character-cell-aligned mode widths 

commit 25161084b1c1b0c29948f6f77266a35f302196b7 upstream.

Turns out 1366x768 does not in fact work on this hardware.

Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Adam Jackson 2015-06-15 16:16:15 -04:00 committed by Greg Kroah-Hartman
parent 63dec31183
commit 97d905e856
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/mgag200/mgag200_mode.c
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@ -1487,6 +1487,11 @@ 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 ||