[PATCH] drm/i915: enable edp vdd in intel_dp_detect

[Daniel Vetter]

We need this for dp aux communication. This issue can fill the dmesg
with WARN spam when the panel is disable (e.g. while reconfiguring the
mode or while resuming).

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=50808
Reported-by: Linus Torvalds <torvalds at linux-foundation.org>
Bugreport: http://permalink.gmane.org/gmane.comp.video.dri.devel/69695
Cc: stable at vger.kernel.org
Signed-Off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
 drivers/gpu/drm/i915/intel_dp.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 296cfc2..9a7edcf 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -2165,6 +2165,7 @@ intel_dp_detect(struct drm_connector *connector, bool force)
 	if (status != connector_status_connected)
 		return status;
 
+	ironlake_edp_panel_vdd_on(intel_dp);
 	intel_dp_probe_oui(intel_dp);
 
 	if (intel_dp->force_audio != HDMI_AUDIO_AUTO) {
@@ -2177,6 +2178,7 @@ intel_dp_detect(struct drm_connector *connector, bool force)
 			kfree(edid);
 		}
 	}
+	ironlake_edp_panel_vdd_off(intel_dp, false);
 
 	return connector_status_connected;
 }
-- 
Daniel Vetter
Mail: daniel at ffwll.ch
Mobile: +41 (0)79 365 57 48