[PATCH 12/21] drm/i915: Ensure eDP powered up during DP_SET_POWER operation in dp_prepare

[Keith Packard]

Any call to intel_dp_sink_dpms must ensure that the panel has power so
that the DP_SET_POWER operation will be correctly received. The only
one missing this was in intel_dp_prepare.

Signed-off-by: Keith Packard <keithp at keithp.com>
---
 drivers/gpu/drm/i915/intel_dp.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 414aef7..a091a18 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1028,7 +1028,9 @@ static void intel_dp_prepare(struct drm_encoder *encoder)
 	struct drm_device *dev = encoder->dev;
 
 	/* Wake up the sink first */
+	ironlake_edp_panel_vdd_on(intel_dp);
 	intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
+	ironlake_edp_panel_vdd_off(intel_dp);
 
 	if (is_edp(intel_dp)) {
 		ironlake_edp_backlight_off(dev);
-- 
1.7.6.3