drm/i915/cdclk: abstract intel_cdclk_pmdemand_needs_update()

Add intel_cdclk_pmdemand_needs_update() helper to avoid looking at
struct intel_cdclk_state internals outside of intel_cdclk.c.

Reviewed-by: Imre Deak <imre.deak@intel.com>
Link: https://lore.kernel.org/r/d0d4f073707a2badb432187f6e02d6d7f9fe431b.1750847509.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Author: jnikula

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

@@ -3849,3 +3849,18 @@ int intel_cdclk_bw_min_cdclk(const struct intel_cdclk_state *cdclk_state)
 {
 	return cdclk_state->bw_min_cdclk;
 }
+
+bool intel_cdclk_pmdemand_needs_update(struct intel_atomic_state *state)
+{
+	const struct intel_cdclk_state *new_cdclk_state, *old_cdclk_state;
+
+	new_cdclk_state = intel_atomic_get_new_cdclk_state(state);
+	old_cdclk_state = intel_atomic_get_old_cdclk_state(state);
+
+	if (new_cdclk_state &&
+	    (new_cdclk_state->actual.cdclk != old_cdclk_state->actual.cdclk ||
+	     new_cdclk_state->actual.voltage_level != old_cdclk_state->actual.voltage_level))
+		return true;
+
+	return false;
+}

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

@@ -100,5 +100,6 @@ void intel_cdclk_debugfs_register(struct intel_display *display);
 int intel_cdclk_logical(const struct intel_cdclk_state *cdclk_state);
 int intel_cdclk_min_cdclk(const struct intel_cdclk_state *cdclk_state, enum pipe pipe);
 int intel_cdclk_bw_min_cdclk(const struct intel_cdclk_state *cdclk_state);
+bool intel_cdclk_pmdemand_needs_update(struct intel_atomic_state *state);
 
 #endif /* __INTEL_CDCLK_H__ */

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

@@ -294,7 +294,6 @@ intel_pmdemand_connector_needs_update(struct intel_atomic_state *state)
 
 static bool intel_pmdemand_needs_update(struct intel_atomic_state *state)
 {
-	const struct intel_cdclk_state *new_cdclk_state, *old_cdclk_state;
 	const struct intel_crtc_state *new_crtc_state, *old_crtc_state;
 	struct intel_crtc *crtc;
 	int i;
@@ -305,13 +304,7 @@ static bool intel_pmdemand_needs_update(struct intel_atomic_state *state)
 	if (intel_dbuf_pmdemand_needs_update(state))
 		return true;
 
-	new_cdclk_state = intel_atomic_get_new_cdclk_state(state);
-	old_cdclk_state = intel_atomic_get_old_cdclk_state(state);
-	if (new_cdclk_state &&
-	    (new_cdclk_state->actual.cdclk !=
-	     old_cdclk_state->actual.cdclk ||
-	     new_cdclk_state->actual.voltage_level !=
-	     old_cdclk_state->actual.voltage_level))
+	if (intel_cdclk_pmdemand_needs_update(state))
 		return true;
 
 	for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,