drm/i915: Introduce intel_crtc_active_changed() and intel_any_crtc_active_changed()

Introduce helpers that determine whether any crtc is changing
its active state. Will be useful for cdclk stuff.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250923171943.7319-3-ville.syrjala@linux.intel.com
Reviewed-by: Mika Kahola <mika.kahola@intel.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_crtc.c b/drivers/gpu/drm/i915/display/intel_crtc.c
index ea735f76107b..7b39c3a5887c 100644
--- a/drivers/gpu/drm/i915/display/intel_crtc.c
+++ b/drivers/gpu/drm/i915/display/intel_crtc.c
@@ -774,3 +774,24 @@ bool intel_any_crtc_enable_changed(struct intel_atomic_state *state)
 
 	return false;
 }
+
+bool intel_crtc_active_changed(const struct intel_crtc_state *old_crtc_state,
+			       const struct intel_crtc_state *new_crtc_state)
+{
+	return old_crtc_state->hw.active != new_crtc_state->hw.active;
+}
+
+bool intel_any_crtc_active_changed(struct intel_atomic_state *state)
+{
+	const struct intel_crtc_state *old_crtc_state, *new_crtc_state;
+	struct intel_crtc *crtc;
+	int i;
+
+	for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
+					    new_crtc_state, i) {
+		if (intel_crtc_active_changed(old_crtc_state, new_crtc_state))
+			return true;
+	}
+
+	return false;
+}