drm/msm: dpu: Stop using encoder->crtc pointer

It's for legacy drivers, for atomic drivers crtc->state->encoder_mask
should be used to map encoder to crtc.

Changes in v2:
- None
Reviewed-by: Jeykumar Sankaran <jsanka@codeaurora.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
[seanpaul resolved conflict with async param of dpu_encoder_kickoff]
Signed-off-by: Rob Clark <robdclark@gmail.com>

drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c

@@ -284,9 +284,9 @@ enum dpu_intf_mode dpu_crtc_get_intf_mode(struct drm_crtc *crtc)
 		return INTF_MODE_NONE;
 	}
 
-	drm_for_each_encoder(encoder, crtc->dev)
-		if (encoder->crtc == crtc)
-			return dpu_encoder_get_intf_mode(encoder);
+	/* TODO: Returns the first INTF_MODE, could there be multiple values? */
+	drm_for_each_encoder_mask(encoder, crtc->dev, crtc->state->encoder_mask)
+		return dpu_encoder_get_intf_mode(encoder);
 
 	return INTF_MODE_NONE;
 }
@@ -562,13 +562,9 @@ static void dpu_crtc_atomic_begin(struct drm_crtc *crtc,
 		spin_unlock_irqrestore(&dev->event_lock, flags);
 	}
 
-	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
-		if (encoder->crtc != crtc)
-			continue;
-
-		/* encoder will trigger pending mask now */
+	/* encoder will trigger pending mask now */
+	drm_for_each_encoder_mask(encoder, crtc->dev, crtc->state->encoder_mask)
 		dpu_encoder_trigger_kickoff_pending(encoder);
-	}
 
 	/*
 	 * If no mixers have been allocated in dpu_crtc_atomic_check(),
@@ -715,7 +711,6 @@ static int _dpu_crtc_wait_for_frame_done(struct drm_crtc *crtc)
 void dpu_crtc_commit_kickoff(struct drm_crtc *crtc, bool async)
 {
 	struct drm_encoder *encoder;
-	struct drm_device *dev = crtc->dev;
 	struct dpu_crtc *dpu_crtc = to_dpu_crtc(crtc);
 	struct dpu_kms *dpu_kms = _dpu_crtc_get_kms(crtc);
 	struct dpu_crtc_state *cstate = to_dpu_crtc_state(crtc->state);
@@ -731,16 +726,13 @@ void dpu_crtc_commit_kickoff(struct drm_crtc *crtc, bool async)
 
 	DPU_ATRACE_BEGIN("crtc_commit");
 
-	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+	/*
+	 * Encoder will flush/start now, unless it has a tx pending. If so, it
+	 * may delay and flush at an irq event (e.g. ppdone)
+	 */
+	drm_for_each_encoder_mask(encoder, crtc->dev,
+				  crtc->state->encoder_mask) {
 		struct dpu_encoder_kickoff_params params = { 0 };
-
-		if (encoder->crtc != crtc)
-			continue;
-
-		/*
-		 * Encoder will flush/start now, unless it has a tx pending.
-		 * If so, it may delay and flush at an irq event (e.g. ppdone)
-		 */
 		dpu_encoder_prepare_for_kickoff(encoder, &params, async);
 	}
 
@@ -768,12 +760,8 @@ void dpu_crtc_commit_kickoff(struct drm_crtc *crtc, bool async)
 
 	dpu_vbif_clear_errors(dpu_kms);
 
-	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
-		if (encoder->crtc != crtc)
-			continue;
-
+	drm_for_each_encoder_mask(encoder, crtc->dev, crtc->state->encoder_mask)
 		dpu_encoder_kickoff(encoder, async);
-	}
 
 end:
 	if (!async)
@@ -910,11 +898,8 @@ static void dpu_crtc_disable(struct drm_crtc *crtc)
 
 	dpu_core_perf_crtc_update(crtc, 0, true);
 
-	drm_for_each_encoder(encoder, crtc->dev) {
-		if (encoder->crtc != crtc)
-			continue;
+	drm_for_each_encoder_mask(encoder, crtc->dev, crtc->state->encoder_mask)
 		dpu_encoder_register_frame_event_callback(encoder, NULL, NULL);
-	}
 
 	memset(cstate->mixers, 0, sizeof(cstate->mixers));
 	cstate->num_mixers = 0;
@@ -949,12 +934,9 @@ static void dpu_crtc_enable(struct drm_crtc *crtc,
 	DRM_DEBUG_KMS("crtc%d\n", crtc->base.id);
 	dpu_crtc = to_dpu_crtc(crtc);
 
-	drm_for_each_encoder(encoder, crtc->dev) {
-		if (encoder->crtc != crtc)
-			continue;
+	drm_for_each_encoder_mask(encoder, crtc->dev, crtc->state->encoder_mask)
 		dpu_encoder_register_frame_event_callback(encoder,
 				dpu_crtc_frame_event_cb, (void *)crtc);
-	}
 
 	mutex_lock(&dpu_crtc->crtc_lock);
 	trace_dpu_crtc_enable(DRMID(crtc), true, dpu_crtc);

drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c

@@ -320,7 +320,10 @@ static void dpu_kms_prepare_commit(struct msm_kms *kms,
 	struct dpu_kms *dpu_kms;
 	struct msm_drm_private *priv;
 	struct drm_device *dev;
+	struct drm_crtc *crtc;
+	struct drm_crtc_state *crtc_state;
 	struct drm_encoder *encoder;
+	int i;
 
 	if (!kms)
 		return;
@@ -332,9 +335,13 @@ static void dpu_kms_prepare_commit(struct msm_kms *kms,
 	priv = dev->dev_private;
 	pm_runtime_get_sync(&dpu_kms->pdev->dev);
 
-	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
-		if (encoder->crtc != NULL)
+	/* Call prepare_commit for all affected encoders */
+	for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
+		drm_for_each_encoder_mask(encoder, crtc->dev,
+					  crtc_state->encoder_mask) {
 			dpu_encoder_prepare_commit(encoder);
+		}
+	}
 }
 
 /*
@@ -344,13 +351,17 @@ static void dpu_kms_prepare_commit(struct msm_kms *kms,
 void dpu_kms_encoder_enable(struct drm_encoder *encoder)
 {
 	const struct drm_encoder_helper_funcs *funcs = encoder->helper_private;
-	struct drm_crtc *crtc = encoder->crtc;
+	struct drm_device *dev = encoder->dev;
+	struct drm_crtc *crtc;
 
 	/* Forward this enable call to the commit hook */
 	if (funcs && funcs->commit)
 		funcs->commit(encoder);
 
-	if (crtc && crtc->state->active) {
+	drm_for_each_crtc(crtc, dev) {
+		if (!(crtc->state->encoder_mask & drm_encoder_mask(encoder)))
+			continue;
+
 		trace_dpu_kms_enc_enable(DRMID(crtc));
 		dpu_crtc_commit_kickoff(crtc, false);
 	}