From: Gajanan Bhat <gajanan.bhat@intel.com>
Date: Wed, 6 Aug 2014 20:28:24 +0000 (+0530)
Subject: drm/i915: Generalize drain latency computation
X-Git-Tag: fixes-against-v3.18-rc2~73^2~78^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0948c2651413d56c90d7ee9c99d75bef82d4c351;p=pandora-kernel.git

drm/i915: Generalize drain latency computation

Modify drain latency computation to use it for any plane. Same function can be
used for primary, cursor and sprite planes.

v2: Adressed review comments by Imre and Ville.
    - Moved clock round up in separate patch
    - Added WARN check for clock and pixel size
    - Simplified bit masking
    - Use cursor_base instead of reg read

v3: Changed to bitwise shorthand operator for plane_dl assignment.

Signed-off-by: Gajanan Bhat <gajanan.bhat@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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