tree 571c190878b0e9f8fd0d787e7066a488409f9443
parent efc2cfff28a9424a0f9f8b068c6c8697435664c3
author Ville Syrjälä <ville.syrjala@linux.intel.com> 1396042172 +0200
committer Daniel Vetter <daniel.vetter@ffwll.ch> 1396255593 +0200

drm/i915: Make sure vsyncshift is positive

If vsyncshift comes out as negative, add one htotal to it to get the
corresponding positive value.

This is rather theoretical as it would require a mode where the
hsync+back porch is very long and the active+front porch very short.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>