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@xxxxxxxxxx>
---
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
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