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; }