[Intel-gfx] [PATCH] drm/i915: eDP aux needs vdd

[Daniel Vetter]

The new oui probe has been missing these.

This issue has been introduce in

commit 0d198328538276c4459ef5de081e68ae60e6c4c2
Author: Adam Jackson <ajax at redhat.com>
Date:   Mon May 14 16:05:47 2012 -0400

    drm/i915/dp: Probe branch/sink OUIs

v2: Do the eDP vdd dance of simply not probing the OUI on eDP panels
as suggested by Chris Wilson.

Cc: Adam Jackson <ajax at redhat.com>
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
Tested-by: Yang Guang <guang.a.yang at intel.com>
Signed-Off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
 drivers/gpu/drm/i915/intel_dp.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 296cfc2..fbc30a5 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1970,6 +1970,8 @@ intel_dp_probe_oui(struct intel_dp *intel_dp)
 {
 	u8 buf[3];
 
+	ironlake_edp_panel_vdd_on(intel_dp);
+
 	if (!(intel_dp->dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT))
 		return;
 
@@ -1980,6 +1982,8 @@ intel_dp_probe_oui(struct intel_dp *intel_dp)
 	if (intel_dp_aux_native_read_retry(intel_dp, DP_BRANCH_OUI, buf, 3))
 		DRM_DEBUG_KMS("Branch OUI: %02hx%02hx%02hx\n",
 			      buf[0], buf[1], buf[2]);
+
+	ironlake_edp_panel_vdd_off(intel_dp, false);
 }
 
 static bool
-- 
1.7.10