drm/i915/cdclk: abstract intel_cdclk_force_min_cdclk()

Add intel_cdclk_force_min_cdclk() helper to avoid modifying struct
intel_cdclk_state internals outside of intel_cdclk.c.

Reviewed-by: Imre Deak <[e-mail]>
Link: https://lore.kernel.org/r/0bf[e-mail]
Signed-off-by: Jani Nikula <[e-mail]>

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

···
 	if (IS_ERR(cdclk_state))
 		return PTR_ERR(cdclk_state);
 
-	cdclk_state->force_min_cdclk = enable ? 2 * 96000 : 0;
+	intel_cdclk_force_min_cdclk(cdclk_state, enable ? 2 * 96000 : 0);
 
 	return drm_atomic_commit(&state->base);
 }

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

···
 
 	return false;
 }
+
+void intel_cdclk_force_min_cdclk(struct intel_cdclk_state *cdclk_state, int force_min_cdclk)
+{
+	cdclk_state->force_min_cdclk = force_min_cdclk;
+}

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

···
 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);
+void intel_cdclk_force_min_cdclk(struct intel_cdclk_state *cdclk_state, int force_min_cdclk);
 
 #endif /* __INTEL_CDCLK_H__ */