drm/i915/alpm: Make crtc_state as const in intel_alpm_compute_params

Intel_alpm_compute_params doesn't change crtc_state. Let's convert it as
const.
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240619062131.4021196-8-jouni.hogander@intel.com

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

@@ -135,8 +135,9 @@ static int _lnl_compute_aux_less_wake_time(int port_clock)
 			    t1 + tcds, 1000);
 }
 
-static int _lnl_compute_aux_less_alpm_params(struct intel_dp *intel_dp,
-					     struct intel_crtc_state *crtc_state)
+static int
+_lnl_compute_aux_less_alpm_params(struct intel_dp *intel_dp,
+				  const struct intel_crtc_state *crtc_state)
 {
 	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
 	int aux_less_wake_time, aux_less_wake_lines, silence_period,
@@ -168,7 +169,7 @@ static int _lnl_compute_aux_less_alpm_params(struct intel_dp *intel_dp,
 }
 
 static bool _lnl_compute_alpm_params(struct intel_dp *intel_dp,
-				     struct intel_crtc_state *crtc_state)
+				     const struct intel_crtc_state *crtc_state)
 {
 	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
 	int check_entry_lines;
@@ -220,7 +221,7 @@ static int io_buffer_wake_time(const struct intel_crtc_state *crtc_state)
 }
 
 bool intel_alpm_compute_params(struct intel_dp *intel_dp,
-				      struct intel_crtc_state *crtc_state)
+			       const struct intel_crtc_state *crtc_state)
 {
 	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
 	int io_wake_lines, io_wake_time, fast_wake_lines, fast_wake_time;

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

@@ -15,7 +15,7 @@ struct intel_connector;
 
 void intel_alpm_init_dpcd(struct intel_dp *intel_dp);
 bool intel_alpm_compute_params(struct intel_dp *intel_dp,
-			       struct intel_crtc_state *crtc_state);
+			       const struct intel_crtc_state *crtc_state);
 void intel_alpm_lobf_compute_config(struct intel_dp *intel_dp,
 				    struct intel_crtc_state *crtc_state,
 				    struct drm_connector_state *conn_state);