drm/i915: Split power sequencer panel on/off functions to locked and unlocked variants

We'll be needing to the call the power seqeuencer functions while
already holding pps_mutex, so split the locking out to small wrapper
functions.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Imre Deak <imre.deak@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 e1894ce..c97bb5c 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1555,23 +1555,23 @@ static void intel_edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync)
        pps_unlock(intel_dp);
 }
 
-void intel_edp_panel_on(struct intel_dp *intel_dp)
+static void edp_panel_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_ctrl_reg;
 
+       lockdep_assert_held(&dev_priv->pps_mutex);
+
        if (!is_edp(intel_dp))
                return;
 
        DRM_DEBUG_KMS("Turn eDP power on\n");
 
-       pps_lock(intel_dp);
-
        if (edp_have_panel_power(intel_dp)) {
                DRM_DEBUG_KMS("eDP power already on\n");
-               goto out;
+               return;
        }
 
        wait_panel_power_cycle(intel_dp);
@@ -1600,12 +1600,20 @@ void intel_edp_panel_on(struct intel_dp *intel_dp)
                I915_WRITE(pp_ctrl_reg, pp);
                POSTING_READ(pp_ctrl_reg);
        }
+}
 
- out:
+void intel_edp_panel_on(struct intel_dp *intel_dp)
+{
+       if (!is_edp(intel_dp))
+               return;
+
+       pps_lock(intel_dp);
+       edp_panel_on(intel_dp);
        pps_unlock(intel_dp);
 }
 
-void intel_edp_panel_off(struct intel_dp *intel_dp)
+
+static void edp_panel_off(struct intel_dp *intel_dp)
 {
        struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
        struct intel_encoder *intel_encoder = &intel_dig_port->base;
@@ -1615,13 +1623,13 @@ void intel_edp_panel_off(struct intel_dp *intel_dp)
        u32 pp;
        u32 pp_ctrl_reg;
 
+       lockdep_assert_held(&dev_priv->pps_mutex);
+
        if (!is_edp(intel_dp))
                return;
 
        DRM_DEBUG_KMS("Turn eDP power off\n");
 
-       pps_lock(intel_dp);
-
        WARN(!intel_dp->want_panel_vdd, "Need VDD to turn off panel\n");
 
        pp = ironlake_get_pp_control(intel_dp);
@@ -1643,7 +1651,15 @@ void intel_edp_panel_off(struct intel_dp *intel_dp)
        /* We got a reference when we enabled the VDD. */
        power_domain = intel_display_port_power_domain(intel_encoder);
        intel_display_power_put(dev_priv, power_domain);
+}
 
+void intel_edp_panel_off(struct intel_dp *intel_dp)
+{
+       if (!is_edp(intel_dp))
+               return;
+
+       pps_lock(intel_dp);
+       edp_panel_off(intel_dp);
        pps_unlock(intel_dp);
 }