drm/i915: Nuke intel_prepare_shared_dpll()

intel_prepare_shared_dpll() is now useless, so get rid of it.

Signed-off-by: Ville Syrjälä <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]
Reviewed-by: Jani Nikula <[e-mail]>

drivers/gpu/drm/i915/display/intel_display.c

···
 	intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, false);
 	intel_set_pch_fifo_underrun_reporting(dev_priv, pipe, false);
 
-	if (new_crtc_state->has_pch_encoder)
-		intel_prepare_shared_dpll(new_crtc_state);
-
 	if (intel_crtc_has_dp_encoder(new_crtc_state))
 		intel_dp_set_m_n(new_crtc_state, M1_N1);
 

drivers/gpu/drm/i915/display/intel_dpll_mgr.c

···
 }
 
 /**
- * intel_prepare_shared_dpll - call a dpll's prepare hook
- * @crtc_state: CRTC, and its state, which has a shared dpll
- *
- * This calls the PLL's prepare hook if it has one and if the PLL is not
- * already enabled. The prepare hook is platform specific.
- */
-void intel_prepare_shared_dpll(const struct intel_crtc_state *crtc_state)
-{
-	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
-	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
-	struct intel_shared_dpll *pll = crtc_state->shared_dpll;
-
-	if (drm_WARN_ON(&dev_priv->drm, pll == NULL))
-		return;
-
-	mutex_lock(&dev_priv->dpll.lock);
-	drm_WARN_ON(&dev_priv->drm, !pll->state.pipe_mask);
-	if (!pll->active_mask) {
-		drm_dbg(&dev_priv->drm, "setting up %s\n", pll->info->name);
-		drm_WARN_ON(&dev_priv->drm, pll->on);
-		assert_shared_dpll_disabled(dev_priv, pll);
-
-		pll->info->funcs->prepare(dev_priv, pll);
-	}
-	mutex_unlock(&dev_priv->dpll.lock);
-}
-
-/**
  * intel_enable_shared_dpll - enable a CRTC's shared DPLL
  * @crtc_state: CRTC, and its state, which has a shared DPLL
  *

drivers/gpu/drm/i915/display/intel_dpll_mgr.h

···
  */
 struct intel_shared_dpll_funcs {
 	/**
-	 * @prepare:
-	 *
-	 * Optional hook to perform operations prior to enabling the PLL.
-	 * Called from intel_prepare_shared_dpll() function unless the PLL
-	 * is already enabled.
-	 */
-	void (*prepare)(struct drm_i915_private *dev_priv,
-			struct intel_shared_dpll *pll);
-
-	/**
 	 * @enable:
 	 *
 	 * Hook for enabling the pll, called from intel_enable_shared_dpll()
···
 bool intel_dpll_get_hw_state(struct drm_i915_private *i915,
 			     struct intel_shared_dpll *pll,
 			     struct intel_dpll_hw_state *hw_state);
-void intel_prepare_shared_dpll(const struct intel_crtc_state *crtc_state);
 void intel_enable_shared_dpll(const struct intel_crtc_state *crtc_state);
 void intel_disable_shared_dpll(const struct intel_crtc_state *crtc_state);
 void intel_shared_dpll_swap_state(struct intel_atomic_state *state);