tree 38e704926acb34986900abf9f581f0c8ef89856a
parent a3a8986cb22aafd83681b7e783ca6d4963712989
author Mahesh Kumar <mahesh1.kumar@intel.com> 1480607375 +0530
committer Paulo Zanoni <paulo.r.zanoni@intel.com> 1481135434 -0200

drm/i915/kbl: IPC workaround for kabylake

Display Workarounds #1141
IPC (Isoch Priority Control) may cause underflows.

KBL WA: When IPC is enabled, watermark latency values must be increased
by 4us across all levels. This brings level 0 up to 6us.

Changes since V1:
 - Add Workaround number in commit & code
Changes since V2 (from Paulo):
 - Bikeshed the WA tag so it looks like the others

Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Mahesh Kumar <mahesh1.kumar@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161201154940.24446-4-mahesh1.kumar@intel.com