From: Vandana Kannan <vandana.kannan@intel.com>
Date: Tue, 4 Nov 2014 17:06:46 +0000 (+0000)
Subject: drm/i915/gen9: Add 2us read latency to WM level
X-Git-Tag: omap-for-v3.20/drop-legacy-3517~77^2~64^2~36
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=367294be7c257dd4d8d8f0e296aa9824eae18568;p=pandora-kernel.git

drm/i915/gen9: Add 2us read latency to WM level

According to the updated Bspec, The mailbox response data is not currently
accounting for memory read latency. Add 2 microseconds to the result for
each level.
This patch adds 2us to latency of level 0 for all cases and
for all other levels (1-7) only if latency[level] > 0.

v2: Slightly rework the patch and add a big comment (Damien)
v3: Rebase on top of the renames of the memory latency defines

Signed-off-by: Vandana Kannan <vandana.kannan@intel.com> (v1)
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> (v2)
Reviewed-by: M, Satheeshakrishna <satheeshakrishna.m@intel.com> (v1)
Cc: Lespiau, Damien <damien.lespiau@intel.com>
Cc: M, Satheeshakrishna <satheeshakrishna.m@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

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