From 0948c2651413d56c90d7ee9c99d75bef82d4c351 Mon Sep 17 00:00:00 2001
From: Gajanan Bhat <gajanan.bhat@intel.com>
Date: Thu, 7 Aug 2014 01:58:24 +0530
Subject: [PATCH] drm/i915: Generalize drain latency computation
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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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