[PATCH 06/17] drm/i915: Split power sequencer panel on/off functions to locked and unlocked variants

ville.syrjala
2014-10-16T18:28:18Z

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

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>
---
drivers/gpu/drm/i915/intel_dp.c | 32 ++++++++++++++++++++++++--------
1 file changed, 24 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 9a1295d..2168568 100644
--- 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);
}

--
2.0.4