drm/i915/display: Abstract C10/C20 pll hw readout

intel_cx0_phy.[ch] should contain the details about C10/C20, not leaking
it to the rest of the driver. Start abstracting this by exporting a
single PLL hw readout that handles the differences between C20 and C10
internally to that compilation unit.
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231018222831.4132968-2-lucas.demarchi@intel.com

drivers/gpu/drm/i915/display/intel_cx0_phy.c

@@ -1864,7 +1864,7 @@ static int intel_c10pll_calc_state(struct intel_crtc_state *crtc_state,
 	return -EINVAL;
 }
 
-void intel_c10pll_readout_hw_state(struct intel_encoder *encoder,
+static void intel_c10pll_readout_hw_state(struct intel_encoder *encoder,
 					  struct intel_c10pll_state *pll_state)
 {
 	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
@@ -2117,7 +2117,7 @@ static bool intel_c20_use_mplla(u32 clock)
 	return false;
 }
 
-void intel_c20pll_readout_hw_state(struct intel_encoder *encoder,
+static void intel_c20pll_readout_hw_state(struct intel_encoder *encoder,
 					  struct intel_c20pll_state *pll_state)
 {
 	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
@@ -3067,3 +3067,15 @@ void intel_c10pll_state_verify(struct intel_atomic_state *state,
 			crtc->base.base.id, crtc->base.name,
 			mpllb_sw_state->cmn, mpllb_hw_state.cmn);
 }
+
+void intel_cx0pll_readout_hw_state(struct intel_encoder *encoder,
+				   struct intel_cx0pll_state *pll_state)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	enum phy phy = intel_port_to_phy(i915, encoder->port);
+
+	if (intel_is_c10phy(i915, phy))
+		intel_c10pll_readout_hw_state(encoder, &pll_state->c10);
+	else
+		intel_c20pll_readout_hw_state(encoder, &pll_state->c20);
+}

drivers/gpu/drm/i915/display/intel_cx0_phy.h

@@ -16,6 +16,7 @@ struct drm_i915_private;
 struct intel_atomic_state;
 struct intel_c10pll_state;
 struct intel_c20pll_state;
+struct intel_cx0pll_state;
 struct intel_crtc;
 struct intel_crtc_state;
 struct intel_encoder;
@@ -28,16 +29,17 @@ void intel_mtl_pll_disable(struct intel_encoder *encoder);
 enum icl_port_dpll_id
 intel_mtl_port_pll_type(struct intel_encoder *encoder,
 			const struct intel_crtc_state *crtc_state);
-void intel_c10pll_readout_hw_state(struct intel_encoder *encoder, struct intel_c10pll_state *pll_state);
+
 int intel_cx0pll_calc_state(struct intel_crtc_state *crtc_state, struct intel_encoder *encoder);
+void intel_cx0pll_readout_hw_state(struct intel_encoder *encoder,
+				   struct intel_cx0pll_state *pll_state);
+
 void intel_c10pll_dump_hw_state(struct drm_i915_private *dev_priv,
 				const struct intel_c10pll_state *hw_state);
 int intel_c10pll_calc_port_clock(struct intel_encoder *encoder,
 				 const struct intel_c10pll_state *pll_state);
 void intel_c10pll_state_verify(struct intel_atomic_state *state,
 			       struct intel_crtc *crtc);
-void intel_c20pll_readout_hw_state(struct intel_encoder *encoder,
-				   struct intel_c20pll_state *pll_state);
 void intel_c20pll_dump_hw_state(struct drm_i915_private *i915,
 				const struct intel_c20pll_state *hw_state);
 int intel_c20pll_calc_port_clock(struct intel_encoder *encoder,

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

@@ -3861,10 +3861,10 @@ static void mtl_ddi_get_config(struct intel_encoder *encoder,
 	if (intel_tc_port_in_tbt_alt_mode(dig_port)) {
 		crtc_state->port_clock = intel_mtl_tbt_calc_port_clock(encoder);
 	} else if (intel_is_c10phy(i915, phy)) {
-		intel_c10pll_readout_hw_state(encoder, &crtc_state->cx0pll_state.c10);
+		intel_cx0pll_readout_hw_state(encoder, &crtc_state->cx0pll_state);
 		crtc_state->port_clock = intel_c10pll_calc_port_clock(encoder, &crtc_state->cx0pll_state.c10);
 	} else {
-		intel_c20pll_readout_hw_state(encoder, &crtc_state->cx0pll_state.c20);
+		intel_cx0pll_readout_hw_state(encoder, &crtc_state->cx0pll_state);
 		crtc_state->port_clock = intel_c20pll_calc_port_clock(encoder, &crtc_state->cx0pll_state.c20);
 	}