From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Thu, 26 Jul 2018 16:15:27 +0000 (+0100)
Subject: drm/i915: Downgrade Gen9 Plane WM latency error
X-Git-Tag: rel_imx_4.19.35_1.1.0~7953
X-Git-Url: https://git.somdevices.com/?a=commitdiff_plain;h=1a90564078087a00aa4d07a559629b99dce46c4e;p=linux.git

drm/i915: Downgrade Gen9 Plane WM latency error

commit 86c1c87d0e6241cbe35bd52badfc84b154e1b959 upstream.

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@chris-wilson.co.uk>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180726161527.10516-1-chris@chris-wilson.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index c3a64d6a18df..425df814de75 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2951,8 +2951,8 @@ 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;
 		}