From: Adam Jackson <ajax@redhat.com>
Date: Tue, 12 Jul 2011 21:38:00 +0000 (-0400)
Subject: drm/i915/dp: Zero the DPCD data before connection probe
X-Git-Tag: firefly_0821_release~3680^2~4714^2~10^2~10^2~6
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=97cdd7101079adc3c626d159c62d43de949516c8;p=firefly-linux-kernel-4.4.55.git

drm/i915/dp: Zero the DPCD data before connection probe

Signed-off-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
---

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index e2aced6eec4c..de24f314eda9 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1673,6 +1673,7 @@ intel_dp_detect(struct drm_connector *connector, bool force)
 	struct edid *edid = NULL;
 
 	intel_dp->has_audio = false;
+	memset(intel_dp->dpcd, 0, sizeof(intel_dp->dpcd));
 
 	if (HAS_PCH_SPLIT(dev))
 		status = ironlake_dp_detect(intel_dp);