drm/i915: Utilize intel_crtc_joined_pipe_mask() more

Unify the master vs. slave handling in
intel_ddi_post_disable_hdmi_or_sst() by looping over all the
pipes in one go.

This also lets us move the intel_crtc_vblank_off() calls to
happen in a consistent place vs. the transcoder disable.
Previously we did the master vs. slaves on different sides
of that.

v2: Use the name 'pipe_crtc' for the per-pipe crtc pointer
Tested-by: Vidya Srinivas <vidya.srinivas@intel.com>
Reviewed-by: Arun R Murthy <arun.r.murthy@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409163502.29633-3-ville.syrjala@linux.intel.com

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

@@ -3097,30 +3097,31 @@ static void intel_ddi_post_disable_hdmi_or_sst(struct intel_atomic_state *state,
 					       const struct drm_connector_state *old_conn_state)
 {
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
-	struct intel_crtc *slave_crtc;
+	struct intel_crtc *pipe_crtc;
+
+	for_each_intel_crtc_in_pipe_mask(&dev_priv->drm, pipe_crtc,
+					 intel_crtc_joined_pipe_mask(old_crtc_state)) {
+		const struct intel_crtc_state *old_pipe_crtc_state =
+			intel_atomic_get_old_crtc_state(state, pipe_crtc);
 
-	intel_crtc_vblank_off(old_crtc_state);
+		intel_crtc_vblank_off(old_pipe_crtc_state);
+	}
 
 	intel_disable_transcoder(old_crtc_state);
 
 	intel_ddi_disable_transcoder_func(old_crtc_state);
 
-	intel_dsc_disable(old_crtc_state);
+	for_each_intel_crtc_in_pipe_mask(&dev_priv->drm, pipe_crtc,
+					 intel_crtc_joined_pipe_mask(old_crtc_state)) {
+		const struct intel_crtc_state *old_pipe_crtc_state =
+			intel_atomic_get_old_crtc_state(state, pipe_crtc);
 
-	if (DISPLAY_VER(dev_priv) >= 9)
-		skl_scaler_disable(old_crtc_state);
-	else
-		ilk_pfit_disable(old_crtc_state);
+		intel_dsc_disable(old_pipe_crtc_state);
 
-	for_each_intel_crtc_in_pipe_mask(&dev_priv->drm, slave_crtc,
-					 intel_crtc_bigjoiner_slave_pipes(old_crtc_state)) {
-		const struct intel_crtc_state *old_slave_crtc_state =
-			intel_atomic_get_old_crtc_state(state, slave_crtc);
-
-		intel_crtc_vblank_off(old_slave_crtc_state);
-
-		intel_dsc_disable(old_slave_crtc_state);
-		skl_scaler_disable(old_slave_crtc_state);
+		if (DISPLAY_VER(dev_priv) >= 9)
+			skl_scaler_disable(old_pipe_crtc_state);
+		else
+			ilk_pfit_disable(old_pipe_crtc_state);
 	}
 }