[Intel-gfx] [PATCH] drm/i915: mark display port DPMS state as 'ON' when enabling output

[Keith Packard]

The display port DPMS state is tracked internally in the display port
driver so that when a hotplug event comes along, the driver can know
whether to try retraining the link. This doesn't work well if the
driver never sets the DPMS state to ON when the output is enabled.

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

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 9ab8708..8602143 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -881,6 +881,7 @@ static void intel_dp_commit(struct drm_encoder *encoder)
 	}
 	if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
 		ironlake_edp_backlight_on(dev);
+	intel_dp->dpms_mode = DRM_MODE_DPMS_ON;
 }
 
 static void
-- 
1.7.1