drm/i915/dp: split edp_panel_vdd_on() for reuse

Introduce _edp_panel_vdd_on() that returns true if the call enabled vdd,
and a matching disable is needed. Keep edp_panel_vdd_on() as a helper
for when it is expected the vdd is off.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.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 49d12d341ab2bf6886a1568081a15954dd9daefd..b463769b93e5d354a63689aa4f5e8686d5e5c9bc 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -91,6 +91,7 @@ static struct intel_dp *intel_attached_dp(struct drm_connector *connector)
 }
 
 static void intel_dp_link_down(struct intel_dp *intel_dp);
+static bool _edp_panel_vdd_on(struct intel_dp *intel_dp);
 static void edp_panel_vdd_on(struct intel_dp *intel_dp);
 static void edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync);
 
@@ -1162,23 +1163,21 @@ static  u32 ironlake_get_pp_control(struct intel_dp *intel_dp)
        return control;
 }
 
-static void edp_panel_vdd_on(struct intel_dp *intel_dp)
+static bool _edp_panel_vdd_on(struct intel_dp *intel_dp)
 {
        struct drm_device *dev = intel_dp_to_dev(intel_dp);
        struct drm_i915_private *dev_priv = dev->dev_private;
        u32 pp;
        u32 pp_stat_reg, pp_ctrl_reg;
+       bool need_to_disable = !intel_dp->want_panel_vdd;
 
        if (!is_edp(intel_dp))
-               return;
-
-       WARN(intel_dp->want_panel_vdd,
-            "eDP VDD already requested on\n");
+               return false;
 
        intel_dp->want_panel_vdd = true;
 
        if (edp_have_panel_vdd(intel_dp))
-               return;
+               return need_to_disable;
 
        intel_runtime_pm_get(dev_priv);
 
@@ -1204,6 +1203,17 @@ static void edp_panel_vdd_on(struct intel_dp *intel_dp)
                DRM_DEBUG_KMS("eDP was not running\n");
                msleep(intel_dp->panel_power_up_delay);
        }
+
+       return need_to_disable;
+}
+
+static void edp_panel_vdd_on(struct intel_dp *intel_dp)
+{
+       if (is_edp(intel_dp)) {
+               bool vdd = _edp_panel_vdd_on(intel_dp);
+
+               WARN(!vdd, "eDP VDD already requested on\n");
+       }
 }
 
 static void edp_panel_vdd_off_sync(struct intel_dp *intel_dp)