From: Thierry Reding <treding@nvidia.com>
Date: Wed, 8 Oct 2014 12:48:51 +0000 (+0200)
Subject: drm/tegra: dc: Add missing call to drm_vblank_on()
X-Git-Tag: omap-for-v3.19/fixes-for-merge-window~107^2^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8ff64c17f3bec8cdafc68461532e273babe2a605;p=pandora-kernel.git

drm/tegra: dc: Add missing call to drm_vblank_on()

When the CRTC is enabled, make sure the VBLANK machinery is enabled.
Failure to do so will cause drm_vblank_get() to not enable the VBLANK on
the CRTC and VBLANK-synchronized page-flips won't work.

While at it, get rid of the legacy drm_vblank_pre_modeset() and
drm_vblank_post_modeset() calls that are replaced by drm_vblank_on()
and drm_vblank_off().

Reported-by: Alexandre Courbot <acourbot@nvidia.com>
Tested-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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