drm/i915: vlv: check port power domain instead of only D0 for eDP VDD on

Some platforms need additional power domains to be on in addition to the
device D0 state to access the panel registers.

Suggested by Daniel.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=76987
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index c4b12e4b3b65de58c1789eee9138315e5507e1c0..9798defc7e8f9b541009b589dafe203a513a0e03 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -313,8 +313,12 @@ static bool edp_have_panel_vdd(struct intel_dp *intel_dp)
 {
        struct drm_device *dev = intel_dp_to_dev(intel_dp);
        struct drm_i915_private *dev_priv = dev->dev_private;
+       struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
+       struct intel_encoder *intel_encoder = &intel_dig_port->base;
+       enum intel_display_power_domain power_domain;
 
-       return !dev_priv->pm.suspended &&
+       power_domain = intel_display_port_power_domain(intel_encoder);
+       return intel_display_power_enabled(dev_priv, power_domain) &&
               (I915_READ(_pp_ctrl_reg(intel_dp)) & EDP_FORCE_VDD) != 0;
 }