This is a note to let you know that I've just added the patch titled
drm/i915: Downgrade Gen9 Plane WM latency error
to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-i915-downgrade-gen9-plane-wm-latency-error.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 7692ef99e1230cfec4b5cf58d8669945fe3f43c7
Author: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Date: Thu Jul 26 17:15:27 2018 +0100
drm/i915: Downgrade Gen9 Plane WM latency error
[ Upstream commit 86c1c87d0e6241cbe35bd52badfc84b154e1b959 ]
According to intel_read_wm_latency() it is perfectly legal for one WM
and all subsequent levels to be 0 (and the deeper powersaving states
disabled), so don't shout *ERROR*, over and over again.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Cc: Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx>
Acked-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20180726161527.10516-1-chris@xxxxxxxxxxxxxxxxxx
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 96a5237741e0c..cb377b003321a 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2934,8 +2934,8 @@ static void intel_print_wm_latency(struct drm_i915_private *dev_priv,
unsigned int latency = wm[level];
if (latency == 0) {
- DRM_ERROR("%s WM%d latency not provided\n",
- name, level);
+ DRM_DEBUG_KMS("%s WM%d latency not provided\n",
+ name, level);
continue;
}
