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 c0329e132462616b7923c5ed77775bb708469aef..ea735f76107b8efaedff342e561f3fb51bcc38a1 100644 (file)
--- 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 8c14ff8b391ea58da1024958a25a4e36900be3e0..eae88e604e0822fbd9afab6ad7a11eb425b21647 100644 (file)
--- 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