Revert "drm/i915/display: Ensure PSR gets disabled if no encoders in new state"

This patches fixes a issue but not in the right way as
for_each_oldnew_intel_crtc_in_state() will interate over all CRTCs
not only the crtc passed as parameter, also this two for_each loops
are not necessary and only make code harder to understand.

Proper fix will be discussed in the next patch.

This reverts commit 75f66490.

Cc: Jouni Högander <jouni.hogander@intel.com>
Cc: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220714150755.154985-1-jose.souza@intel.com

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

@@ -1863,45 +1863,36 @@ void intel_psr_pre_plane_update(struct intel_atomic_state *state,
 				struct intel_crtc *crtc)
 {
 	struct drm_i915_private *i915 = to_i915(state->base.dev);
-	struct intel_crtc_state *new_crtc_state, *old_crtc_state;
-	int i;
+	const struct intel_crtc_state *crtc_state =
+		intel_atomic_get_new_crtc_state(state, crtc);
+	struct intel_encoder *encoder;
 
 	if (!HAS_PSR(i915))
 		return;
 
-	for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
-					    new_crtc_state, i) {
-		struct intel_encoder *encoder;
-		u32 old_new_encoder_mask = old_crtc_state->uapi.encoder_mask |
-			new_crtc_state->uapi.encoder_mask;
-
-		for_each_intel_encoder_mask_with_psr(state->base.dev, encoder,
-						     old_new_encoder_mask) {
-			struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
-			struct intel_psr *psr = &intel_dp->psr;
-			bool needs_to_disable = false;
+	for_each_intel_encoder_mask_with_psr(state->base.dev, encoder,
+					     crtc_state->uapi.encoder_mask) {
+		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+		struct intel_psr *psr = &intel_dp->psr;
+		bool needs_to_disable = false;
 
-			mutex_lock(&psr->lock);
+		mutex_lock(&psr->lock);
 
-			/*
-			 * Reasons to disable:
-			 * - PSR disabled in new state
-			 * - All planes will go inactive
-			 * - Changing between PSR versions
-			 * - Encoder isn't present in new mask
-			 */
-			needs_to_disable |= intel_crtc_needs_modeset(new_crtc_state);
-			needs_to_disable |= !new_crtc_state->has_psr;
-			needs_to_disable |= !new_crtc_state->active_planes;
-			needs_to_disable |= new_crtc_state->has_psr2 != psr->psr2_enabled;
-			needs_to_disable |= !(new_crtc_state->uapi.encoder_mask &
-					      drm_encoder_mask(&(encoder)->base));
+		/*
+		 * Reasons to disable:
+		 * - PSR disabled in new state
+		 * - All planes will go inactive
+		 * - Changing between PSR versions
+		 */
+		needs_to_disable |= intel_crtc_needs_modeset(crtc_state);
+		needs_to_disable |= !crtc_state->has_psr;
+		needs_to_disable |= !crtc_state->active_planes;
+		needs_to_disable |= crtc_state->has_psr2 != psr->psr2_enabled;
 
-			if (psr->enabled && needs_to_disable)
-				intel_psr_disable_locked(intel_dp);
+		if (psr->enabled && needs_to_disable)
+			intel_psr_disable_locked(intel_dp);
 
-			mutex_unlock(&psr->lock);
-		}
+		mutex_unlock(&psr->lock);
 	}
 }