drm/i915: Constify the snps/c10x PLL state checkers

State checkers should never modify the crtc states, so make
them const.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231004155607.7719-8-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

Author: vsyrjala

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

@@ -3005,11 +3005,11 @@ intel_mtl_port_pll_type(struct intel_encoder *encoder,
 }
 
 void intel_c10pll_state_verify(struct intel_atomic_state *state,
-			       struct intel_crtc_state *new_crtc_state)
+			       const struct intel_crtc_state *new_crtc_state)
 {
 	struct drm_i915_private *i915 = to_i915(state->base.dev);
 	struct intel_c10pll_state mpllb_hw_state = { 0 };
-	struct intel_c10pll_state *mpllb_sw_state = &new_crtc_state->cx0pll_state.c10;
+	const struct intel_c10pll_state *mpllb_sw_state = &new_crtc_state->cx0pll_state.c10;
 	struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->uapi.crtc);
 	struct intel_encoder *encoder;
 	enum phy phy;

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

@@ -34,7 +34,7 @@ void intel_c10pll_dump_hw_state(struct drm_i915_private *dev_priv,
 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_state *new_crtc_state);
+			       const struct intel_crtc_state *new_crtc_state);
 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,

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

@@ -1993,11 +1993,11 @@ int intel_snps_phy_check_hdmi_link_rate(int clock)
 }
 
 void intel_mpllb_state_verify(struct intel_atomic_state *state,
-			      struct intel_crtc_state *new_crtc_state)
+			      const struct intel_crtc_state *new_crtc_state)
 {
 	struct drm_i915_private *i915 = to_i915(state->base.dev);
 	struct intel_mpllb_state mpllb_hw_state = { 0 };
-	struct intel_mpllb_state *mpllb_sw_state = &new_crtc_state->mpllb_state;
+	const struct intel_mpllb_state *mpllb_sw_state = &new_crtc_state->mpllb_state;
 	struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->uapi.crtc);
 	struct intel_encoder *encoder;
 

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

@@ -33,6 +33,6 @@ int intel_snps_phy_check_hdmi_link_rate(int clock);
 void intel_snps_phy_set_signal_levels(struct intel_encoder *encoder,
 				      const struct intel_crtc_state *crtc_state);
 void intel_mpllb_state_verify(struct intel_atomic_state *state,
-			      struct intel_crtc_state *new_crtc_state);
+			      const struct intel_crtc_state *new_crtc_state);
 
 #endif /* __INTEL_SNPS_PHY_H__ */