drm/i915: Nuke intel_get_shared_dpll_id()

Each PLL knows its own ID so intel_get_shared_dpll_id() is
pointless. Get rid of it.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220921122343.13061-3-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

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

@@ -3536,7 +3536,7 @@ static void icl_ddi_tc_get_clock(struct intel_encoder *encoder,
 	if (drm_WARN_ON(&i915->drm, !pll))
 		return;
 
-	if (intel_get_shared_dpll_id(i915, pll) == DPLL_ID_ICL_TBTPLL)
+	if (pll->info->id == DPLL_ID_ICL_TBTPLL)
 		port_dpll_id = ICL_PORT_DPLL_DEFAULT;
 	else
 		port_dpll_id = ICL_PORT_DPLL_MG_PHY;
@@ -3549,7 +3549,7 @@ static void icl_ddi_tc_get_clock(struct intel_encoder *encoder,
 
 	icl_set_active_port_dpll(crtc_state, port_dpll_id);
 
-	if (intel_get_shared_dpll_id(i915, crtc_state->shared_dpll) == DPLL_ID_ICL_TBTPLL)
+	if (crtc_state->shared_dpll->info->id == DPLL_ID_ICL_TBTPLL)
 		crtc_state->port_clock = icl_calc_tbt_pll_link(i915, encoder->port);
 	else
 		crtc_state->port_clock = intel_dpll_get_freq(i915, crtc_state->shared_dpll,

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

@@ -152,28 +152,6 @@ intel_get_shared_dpll_by_id(struct drm_i915_private *dev_priv,
 	return &dev_priv->display.dpll.shared_dplls[id];
 }
 
-/**
- * intel_get_shared_dpll_id - get the id of a DPLL
- * @dev_priv: i915 device instance
- * @pll: the DPLL
- *
- * Returns:
- * The id of @pll
- */
-enum intel_dpll_id
-intel_get_shared_dpll_id(struct drm_i915_private *dev_priv,
-			 struct intel_shared_dpll *pll)
-{
-	long pll_idx = pll - dev_priv->display.dpll.shared_dplls;
-
-	if (drm_WARN_ON(&dev_priv->drm,
-			pll_idx < 0 ||
-			pll_idx >= dev_priv->display.dpll.num_shared_dpll))
-		return -1;
-
-	return pll_idx;
-}
-
 /* For ILK+ */
 void assert_shared_dpll(struct drm_i915_private *dev_priv,
 			struct intel_shared_dpll *pll,

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

@@ -328,9 +328,6 @@ struct intel_shared_dpll {
 struct intel_shared_dpll *
 intel_get_shared_dpll_by_id(struct drm_i915_private *dev_priv,
 			    enum intel_dpll_id id);
-enum intel_dpll_id
-intel_get_shared_dpll_id(struct drm_i915_private *dev_priv,
-			 struct intel_shared_dpll *pll);
 void assert_shared_dpll(struct drm_i915_private *dev_priv,
 			struct intel_shared_dpll *pll,
 			bool state);