From: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Fri, 28 Mar 2014 21:29:32 +0000 (+0200)
Subject: drm/i915: Make sure vsyncshift is positive
X-Git-Tag: v3.15-rc1~51^2~1^2~24
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1caea6e945e0867d391369097937620c945dcec1;p=pandora-kernel.git

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>
---

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