[PATCH 06/17] drm/i915: Merge vlv/chv _prepare_pll() with their enable counterpart

[Ander Conselvan de Oliveira]

With the bulk of the dpio code moved out of the vlv/chv prepare pll
functions into intel_dpio_phy.c, those functions became simple enough
that they can be merged with the pll enabling function, that always
succeeds the prepare call.
---
 drivers/gpu/drm/i915/intel_display.c | 82 ++++++++++++------------------------
 1 file changed, 26 insertions(+), 56 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index c2f9b66..87f454a 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -104,10 +104,6 @@ static void intel_cpu_transcoder_set_m_n(struct intel_crtc *crtc,
 static void ironlake_set_pipeconf(struct drm_crtc *crtc);
 static void haswell_set_pipeconf(struct drm_crtc *crtc);
 static void haswell_set_pipemisc(struct drm_crtc *crtc);
-static void vlv_prepare_pll(struct intel_crtc *crtc,
-			    const struct intel_crtc_state *pipe_config);
-static void chv_prepare_pll(struct intel_crtc *crtc,
-			    const struct intel_crtc_state *pipe_config);
 static void intel_begin_crtc_commit(struct drm_crtc *, struct drm_crtc_state *);
 static void intel_finish_crtc_commit(struct drm_crtc *, struct drm_crtc_state *);
 static void skl_init_scalers(struct drm_device *dev, struct intel_crtc *intel_crtc,
@@ -1547,6 +1543,19 @@ static void vlv_enable_pll(struct intel_crtc *crtc,
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	enum pipe pipe = crtc->pipe;
 
+	/* Enable Refclk */
+	I915_WRITE(DPLL(pipe),
+		   pipe_config->dpll_hw_state.dpll &
+		   ~(DPLL_VCO_ENABLE | DPLL_EXT_BUFFER_ENABLE_VLV));
+
+	/* No need to actually set up the DPLL with DSI */
+	if ((pipe_config->dpll_hw_state.dpll & DPLL_VCO_ENABLE) != 0)
+		vlv_phy_prepare_pll(crtc, pipe_config->dpll.n,
+				    pipe_config->dpll.m1, pipe_config->dpll.m2,
+				    pipe_config->dpll.p1, pipe_config->dpll.p2,
+				    pipe_config->port_clock,
+				    pipe_config->has_dp_encoder);
+
 	assert_pipe_disabled(dev_priv, pipe);
 
 	/* PLL is protected by panel, make sure we can write it */
@@ -1596,6 +1605,17 @@ 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;
 
+	/* Enable Refclk and SSC */
+	I915_WRITE(DPLL(pipe),
+		   pipe_config->dpll_hw_state.dpll & ~DPLL_VCO_ENABLE);
+
+	/* No need to actually set up the DPLL with DSI */
+	if ((pipe_config->dpll_hw_state.dpll & DPLL_VCO_ENABLE) != 0)
+		chv_phy_prepare_pll(crtc, pipe_config->dpll.n,
+				    pipe_config->dpll.m1, pipe_config->dpll.m2,
+				    pipe_config->dpll.p1, pipe_config->dpll.p2,
+				    pipe_config->dpll.vco);
+
 	assert_pipe_disabled(dev_priv, pipe);
 
 	/* PLL is protected by panel, make sure we can write it */
@@ -6092,13 +6112,10 @@ static void valleyview_crtc_enable(struct drm_crtc *crtc)
 		if (encoder->pre_pll_enable)
 			encoder->pre_pll_enable(encoder);
 
-	if (IS_CHERRYVIEW(dev)) {
-		chv_prepare_pll(intel_crtc, intel_crtc->config);
+	if (IS_CHERRYVIEW(dev))
 		chv_enable_pll(intel_crtc, intel_crtc->config);
-	} else {
-		vlv_prepare_pll(intel_crtc, intel_crtc->config);
+	else
 		vlv_enable_pll(intel_crtc, intel_crtc->config);
-	}
 
 	for_each_encoder_on_crtc(dev, crtc, encoder)
 		if (encoder->pre_enable)
@@ -7190,51 +7207,6 @@ static void chv_compute_dpll(struct intel_crtc *crtc,
 		(pipe_config->pixel_multiplier - 1) << DPLL_MD_UDI_MULTIPLIER_SHIFT;
 }
 
-static void vlv_prepare_pll(struct intel_crtc *crtc,
-			    const struct intel_crtc_state *pipe_config)
-{
-	struct drm_device *dev = crtc->base.dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	enum pipe pipe = crtc->pipe;
-
-	/* Enable Refclk */
-	I915_WRITE(DPLL(pipe),
-		   pipe_config->dpll_hw_state.dpll &
-		   ~(DPLL_VCO_ENABLE | DPLL_EXT_BUFFER_ENABLE_VLV));
-
-	/* No need to actually set up the DPLL with DSI */
-	if ((pipe_config->dpll_hw_state.dpll & DPLL_VCO_ENABLE) == 0)
-		return;
-
-	vlv_phy_prepare_pll(crtc, pipe_config->dpll.n,
-			    pipe_config->dpll.m1, pipe_config->dpll.m2,
-			    pipe_config->dpll.p1, pipe_config->dpll.p2,
-			    pipe_config->port_clock,
-			    pipe_config->has_dp_encoder);
-
-}
-
-static void chv_prepare_pll(struct intel_crtc *crtc,
-			    const struct intel_crtc_state *pipe_config)
-{
-	struct drm_device *dev = crtc->base.dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	enum pipe pipe = crtc->pipe;
-
-	/* Enable Refclk and SSC */
-	I915_WRITE(DPLL(pipe),
-		   pipe_config->dpll_hw_state.dpll & ~DPLL_VCO_ENABLE);
-
-	/* No need to actually set up the DPLL with DSI */
-	if ((pipe_config->dpll_hw_state.dpll & DPLL_VCO_ENABLE) == 0)
-		return;
-
-	chv_phy_prepare_pll(crtc, pipe_config->dpll.n,
-			    pipe_config->dpll.m1, pipe_config->dpll.m2,
-			    pipe_config->dpll.p1, pipe_config->dpll.p2,
-			    pipe_config->dpll.vco);
-}
-
 /**
  * vlv_force_pll_on - forcibly enable just the PLL
  * @dev_priv: i915 private structure
@@ -7262,11 +7234,9 @@ int vlv_force_pll_on(struct drm_device *dev, enum pipe pipe,
 
 	if (IS_CHERRYVIEW(dev)) {
 		chv_compute_dpll(crtc, pipe_config);
-		chv_prepare_pll(crtc, pipe_config);
 		chv_enable_pll(crtc, pipe_config);
 	} else {
 		vlv_compute_dpll(crtc, pipe_config);
-		vlv_prepare_pll(crtc, pipe_config);
 		vlv_enable_pll(crtc, pipe_config);
 	}
 
-- 
2.4.11