drm/i915: Constify the crtc states in the DPLL checker

The DPLL state checker should not be modifying the crtc states,
so make the const.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231004155607.7719-4-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

Author: vsyrjala

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

@@ -4460,7 +4460,7 @@ static void
 verify_single_dpll_state(struct drm_i915_private *i915,
 			 struct intel_shared_dpll *pll,
 			 struct intel_crtc *crtc,
-			 struct intel_crtc_state *new_crtc_state)
+			 const struct intel_crtc_state *new_crtc_state)
 {
 	struct intel_dpll_hw_state dpll_hw_state;
 	u8 pipe_mask;
@@ -4513,8 +4513,8 @@ verify_single_dpll_state(struct drm_i915_private *i915,
 }
 
 void intel_shared_dpll_state_verify(struct intel_crtc *crtc,
-				    struct intel_crtc_state *old_crtc_state,
-				    struct intel_crtc_state *new_crtc_state)
+				    const struct intel_crtc_state *old_crtc_state,
+				    const struct intel_crtc_state *new_crtc_state)
 {
 	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
 

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

@@ -370,8 +370,8 @@ enum intel_dpll_id icl_tc_port_to_pll_id(enum tc_port tc_port);
 bool intel_dpll_is_combophy(enum intel_dpll_id id);
 
 void intel_shared_dpll_state_verify(struct intel_crtc *crtc,
-				    struct intel_crtc_state *old_crtc_state,
-				    struct intel_crtc_state *new_crtc_state);
+				    const struct intel_crtc_state *old_crtc_state,
+				    const struct intel_crtc_state *new_crtc_state);
 void intel_shared_dpll_verify_disabled(struct drm_i915_private *i915);
 
 #endif /* _INTEL_DPLL_MGR_H_ */