]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
drm/i915/kbl: IPC workaround for kabylake
authorMahesh Kumar <mahesh1.kumar@intel.com>
Thu, 1 Dec 2016 15:49:35 +0000 (21:19 +0530)
committerPaulo Zanoni <paulo.r.zanoni@intel.com>
Wed, 7 Dec 2016 18:30:34 +0000 (16:30 -0200)
commit4b7b2331885a1ab348178f3faf9dc6a4dccae01a
tree38e704926acb34986900abf9f581f0c8ef89856a
parenta3a8986cb22aafd83681b7e783ca6d4963712989
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
drivers/gpu/drm/i915/intel_pm.c