From cdffe3e252bb55e82ee89bbdfe8d2f18b6157c28 Mon Sep 17 00:00:00 2001 From: Lyude Date: Wed, 26 Oct 2016 12:36:09 -0400 Subject: [PATCH] drm/i915/vlv: Prevent enabling hpd polling in late suspend MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit One of the CI machines began to run into issues with the hpd poller suddenly waking up in the midst of the late suspend phase. It looks like this is getting caused by the fact we now deinitialize power wells in late suspend, which means that intel_hpd_poll_init() gets called in late suspend causing polling to get re-enabled. So, when deinitializing power wells on valleyview we now refrain from enabling polling in the midst of suspend. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=98040 Fixes: 19625e85c6ec ("drm/i915: Enable polling when we don't have hpd") Signed-off-by: Lyude Cc: Ville Syrjälä Cc: Jani Saarinen Cc: Petry Latvala Reviewed-by: Ville Syrjälä Signed-off-by: Jani Nikula Link: http://patchwork.freedesktop.org/patch/msgid/1477499769-1966-1-git-send-email-lyude@redhat.com (cherry picked from commit b64b540931483cca3200d98756bed6ad0e01d75c) Signed-off-by: Jani Nikula --- drivers/gpu/drm/i915/intel_runtime_pm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c index 6c11168facd6..a38c2fefe85a 100644 --- a/drivers/gpu/drm/i915/intel_runtime_pm.c +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c @@ -1139,7 +1139,9 @@ static void vlv_display_power_well_deinit(struct drm_i915_private *dev_priv) intel_power_sequencer_reset(dev_priv); - intel_hpd_poll_init(dev_priv); + /* Prevent us from re-enabling polling on accident in late suspend */ + if (!dev_priv->drm.dev->power.is_suspended) + intel_hpd_poll_init(dev_priv); } static void vlv_display_power_well_enable(struct drm_i915_private *dev_priv, -- 2.30.2