[Intel-gfx] [PATCH 6/6] drm/i915: Move toggling of CHV DPIO_DCLKP_EN to intel_dpio_phy.c

[Ander Conselvan de Oliveira]

This simplifies the pll enable/disable a code a bit and hides the
sideband message neatly in intel_dpio_phy.c.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira at intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h       |  2 ++
 drivers/gpu/drm/i915/intel_display.c  | 19 ++-----------------
 drivers/gpu/drm/i915/intel_dpio_phy.c | 18 ++++++++++++++++++
 3 files changed, 22 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 149317c..44f4b7a 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3630,6 +3630,8 @@ void chv_phy_post_pll_disable(struct intel_encoder *encoder);
 void chv_phy_prepare_pll(struct intel_crtc *crtc, u32 bestn,
 			 u32 bestm1, u32 bestm2, u32 bestp1, u32 bestp2,
 			 int vco);
+void chv_phy_toggle_dclkp(struct drm_i915_private *dev_priv, enum pipe pipe,
+			  bool enable);
 void chv_phy_read_dividers(struct drm_i915_private *dev_priv,
 			   enum pipe pipe, struct intel_dpll *clock);
 
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 5ba000a..d43bdff 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1574,17 +1574,9 @@ static void _chv_enable_pll(struct intel_crtc *crtc,
 {
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	enum pipe pipe = crtc->pipe;
-	enum dpio_channel port = vlv_pipe_to_channel(pipe);
-	u32 tmp;
-
-	mutex_lock(&dev_priv->sb_lock);
 
 	/* Enable back the 10bit clock to display controller */
-	tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW14(port));
-	tmp |= DPIO_DCLKP_EN;
-	vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW14(port), tmp);
-
-	mutex_unlock(&dev_priv->sb_lock);
+	chv_phy_toggle_dclkp(dev_priv, pipe, true);
 
 	/*
 	 * Need to wait > 100ns between dclkp clock enable bit and PLL enable.
@@ -1777,7 +1769,6 @@ static void vlv_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
 
 static void chv_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
 {
-	enum dpio_channel port = vlv_pipe_to_channel(pipe);
 	u32 val;
 
 	/* Make sure the pipe isn't still relying on us */
@@ -1791,14 +1782,8 @@ static void chv_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
 	I915_WRITE(DPLL(pipe), val);
 	POSTING_READ(DPLL(pipe));
 
-	mutex_lock(&dev_priv->sb_lock);
-
 	/* Disable 10bit clock to display controller */
-	val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW14(port));
-	val &= ~DPIO_DCLKP_EN;
-	vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW14(port), val);
-
-	mutex_unlock(&dev_priv->sb_lock);
+	chv_phy_toggle_dclkp(dev_priv, pipe, false);
 }
 
 void vlv_wait_port_ready(struct drm_i915_private *dev_priv,
diff --git a/drivers/gpu/drm/i915/intel_dpio_phy.c b/drivers/gpu/drm/i915/intel_dpio_phy.c
index 2a5d333..64788e3 100644
--- a/drivers/gpu/drm/i915/intel_dpio_phy.c
+++ b/drivers/gpu/drm/i915/intel_dpio_phy.c
@@ -461,6 +461,24 @@ void chv_phy_prepare_pll(struct intel_crtc *crtc, u32 bestn,
 	mutex_unlock(&dev_priv->sb_lock);
 }
 
+void chv_phy_toggle_dclkp(struct drm_i915_private *dev_priv, enum pipe pipe,
+			  bool enable)
+{
+	enum dpio_channel port = vlv_pipe_to_channel(pipe);
+	u32 dpio_val;
+
+	mutex_lock(&dev_priv->sb_lock);
+
+	dpio_val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW14(port));
+	if (enable)
+		dpio_val |= DPIO_DCLKP_EN;
+	else
+		dpio_val &= ~DPIO_DCLKP_EN;
+	vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW14(port), dpio_val);
+
+	mutex_unlock(&dev_priv->sb_lock);
+}
+
 void chv_phy_read_dividers(struct drm_i915_private *dev_priv,
 			   enum pipe pipe, struct intel_dpll *clock)
 {
-- 
2.5.5