From: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Tue, 23 Sep 2025 17:19:23 +0000 (+0300)
Subject: drm/i915: Introduce intel_crtc_enable_changed() and intel_any_crtc_enable_changed()
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=b8459c3b6e96137527dea2164b816bf267867e4a;p=thirdparty%2Fkernel%2Flinux.git

drm/i915: Introduce intel_crtc_enable_changed() and intel_any_crtc_enable_changed()

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

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250923171943.7319-2-ville.syrjala@linux.intel.com
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
---

diff --git a/drivers/gpu/drm/i915/display/intel_crtc.c b/drivers/gpu/drm/i915/display/intel_crtc.c
index c0329e1324626..ea735f76107b8 100644
--- a/drivers/gpu/drm/i915/display/intel_crtc.c
+++ b/drivers/gpu/drm/i915/display/intel_crtc.c
@@ -753,3 +753,24 @@ void intel_pipe_update_end(struct intel_atomic_state *state,
 out:
 	intel_psr_unlock(new_crtc_state);
 }
+
+bool intel_crtc_enable_changed(const struct intel_crtc_state *old_crtc_state,
+			       const struct intel_crtc_state *new_crtc_state)
+{
+	return old_crtc_state->hw.enable != new_crtc_state->hw.enable;
+}
+
+bool intel_any_crtc_enable_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_enable_changed(old_crtc_state, new_crtc_state))
+			return true;
+	}
+
+	return false;
+}
diff --git a/drivers/gpu/drm/i915/display/intel_crtc.h b/drivers/gpu/drm/i915/display/intel_crtc.h
index 8c14ff8b391ea..eae88e604e082 100644
--- a/drivers/gpu/drm/i915/display/intel_crtc.h
+++ b/drivers/gpu/drm/i915/display/intel_crtc.h
@@ -58,4 +58,8 @@ void intel_wait_for_vblank_if_active(struct intel_display *display,
 				     enum pipe pipe);
 void intel_crtc_wait_for_next_vblank(struct intel_crtc *crtc);
 
+bool intel_any_crtc_enable_changed(struct intel_atomic_state *state);
+bool intel_crtc_enable_changed(const struct intel_crtc_state *old_crtc_state,
+			       const struct intel_crtc_state *new_crtc_state);
+
 #endif