drm/msm/dpu: drop MSM_ENC_VBLANK support

There are no in-kernel users of MSM_ENC_VBLANK wait type. Drop it
together with the corresponding wait_for_vblank callback.
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/560701/
Link: https://lore.kernel.org/r/20231004031903.518223-1-dmitry.baryshkov@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

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

@@ -2400,9 +2400,6 @@ int dpu_encoder_wait_for_event(struct drm_encoder *drm_enc,
 		case MSM_ENC_TX_COMPLETE:
 			fn_wait = phys->ops.wait_for_tx_complete;
 			break;
-		case MSM_ENC_VBLANK:
-			fn_wait = phys->ops.wait_for_vblank;
-			break;
 		default:
 			DPU_ERROR_ENC(dpu_enc, "unknown wait event %d\n",
 					event);

drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h

@@ -104,7 +104,6 @@ struct dpu_encoder_phys_ops {
 	int (*control_vblank_irq)(struct dpu_encoder_phys *enc, bool enable);
 	int (*wait_for_commit_done)(struct dpu_encoder_phys *phys_enc);
 	int (*wait_for_tx_complete)(struct dpu_encoder_phys *phys_enc);
-	int (*wait_for_vblank)(struct dpu_encoder_phys *phys_enc);
 	void (*prepare_for_kickoff)(struct dpu_encoder_phys *phys_enc);
 	void (*handle_post_kickoff)(struct dpu_encoder_phys *phys_enc);
 	void (*trigger_start)(struct dpu_encoder_phys *phys_enc);

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

@@ -675,33 +675,6 @@ static int dpu_encoder_phys_cmd_wait_for_commit_done(
 	return _dpu_encoder_phys_cmd_wait_for_ctl_start(phys_enc);
 }
 
-static int dpu_encoder_phys_cmd_wait_for_vblank(
-		struct dpu_encoder_phys *phys_enc)
-{
-	int rc = 0;
-	struct dpu_encoder_phys_cmd *cmd_enc;
-	struct dpu_encoder_wait_info wait_info;
-
-	cmd_enc = to_dpu_encoder_phys_cmd(phys_enc);
-
-	/* only required for master controller */
-	if (!dpu_encoder_phys_cmd_is_master(phys_enc))
-		return rc;
-
-	wait_info.wq = &cmd_enc->pending_vblank_wq;
-	wait_info.atomic_cnt = &cmd_enc->pending_vblank_cnt;
-	wait_info.timeout_ms = KICKOFF_TIMEOUT_MS;
-
-	atomic_inc(&cmd_enc->pending_vblank_cnt);
-
-	rc = dpu_encoder_helper_wait_for_irq(phys_enc,
-			phys_enc->irq[INTR_IDX_RDPTR],
-			dpu_encoder_phys_cmd_te_rd_ptr_irq,
-			&wait_info);
-
-	return rc;
-}
-
 static void dpu_encoder_phys_cmd_handle_post_kickoff(
 		struct dpu_encoder_phys *phys_enc)
 {
@@ -729,7 +702,6 @@ static void dpu_encoder_phys_cmd_init_ops(
 	ops->wait_for_commit_done = dpu_encoder_phys_cmd_wait_for_commit_done;
 	ops->prepare_for_kickoff = dpu_encoder_phys_cmd_prepare_for_kickoff;
 	ops->wait_for_tx_complete = dpu_encoder_phys_cmd_wait_for_tx_complete;
-	ops->wait_for_vblank = dpu_encoder_phys_cmd_wait_for_vblank;
 	ops->trigger_start = dpu_encoder_phys_cmd_trigger_start;
 	ops->needs_single_flush = dpu_encoder_phys_cmd_needs_single_flush;
 	ops->irq_control = dpu_encoder_phys_cmd_irq_control;

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

@@ -440,7 +440,7 @@ static void dpu_encoder_phys_vid_enable(struct dpu_encoder_phys *phys_enc)
 		phys_enc->enable_state = DPU_ENC_ENABLING;
 }
 
-static int dpu_encoder_phys_vid_wait_for_vblank(
+static int dpu_encoder_phys_vid_wait_for_tx_complete(
 		struct dpu_encoder_phys *phys_enc)
 {
 	struct dpu_encoder_wait_info wait_info;
@@ -554,7 +554,7 @@ static void dpu_encoder_phys_vid_disable(struct dpu_encoder_phys *phys_enc)
 	 * scanout buffer) don't latch properly..
 	 */
 	if (dpu_encoder_phys_vid_is_master(phys_enc)) {
-		ret = dpu_encoder_phys_vid_wait_for_vblank(phys_enc);
+		ret = dpu_encoder_phys_vid_wait_for_tx_complete(phys_enc);
 		if (ret) {
 			atomic_set(&phys_enc->pending_kickoff_cnt, 0);
 			DRM_ERROR("wait disable failed: id:%u intf:%d ret:%d\n",
@@ -574,7 +574,7 @@ static void dpu_encoder_phys_vid_disable(struct dpu_encoder_phys *phys_enc)
 		spin_lock_irqsave(phys_enc->enc_spinlock, lock_flags);
 		dpu_encoder_phys_inc_pending(phys_enc);
 		spin_unlock_irqrestore(phys_enc->enc_spinlock, lock_flags);
-		ret = dpu_encoder_phys_vid_wait_for_vblank(phys_enc);
+		ret = dpu_encoder_phys_vid_wait_for_tx_complete(phys_enc);
 		if (ret) {
 			atomic_set(&phys_enc->pending_kickoff_cnt, 0);
 			DRM_ERROR("wait disable failed: id:%u intf:%d ret:%d\n",
@@ -679,8 +679,7 @@ static void dpu_encoder_phys_vid_init_ops(struct dpu_encoder_phys_ops *ops)
 	ops->disable = dpu_encoder_phys_vid_disable;
 	ops->control_vblank_irq = dpu_encoder_phys_vid_control_vblank_irq;
 	ops->wait_for_commit_done = dpu_encoder_phys_vid_wait_for_commit_done;
-	ops->wait_for_vblank = dpu_encoder_phys_vid_wait_for_vblank;
-	ops->wait_for_tx_complete = dpu_encoder_phys_vid_wait_for_vblank;
+	ops->wait_for_tx_complete = dpu_encoder_phys_vid_wait_for_tx_complete;
 	ops->irq_control = dpu_encoder_phys_vid_irq_control;
 	ops->prepare_for_kickoff = dpu_encoder_phys_vid_prepare_for_kickoff;
 	ops->handle_post_kickoff = dpu_encoder_phys_vid_handle_post_kickoff;

drivers/gpu/drm/msm/msm_drv.h

@@ -78,12 +78,10 @@ enum msm_dsi_controller {
  * enum msm_event_wait - type of HW events to wait for
  * @MSM_ENC_COMMIT_DONE - wait for the driver to flush the registers to HW
  * @MSM_ENC_TX_COMPLETE - wait for the HW to transfer the frame to panel
- * @MSM_ENC_VBLANK - wait for the HW VBLANK event (for driver-internal waiters)
  */
 enum msm_event_wait {
 	MSM_ENC_COMMIT_DONE = 0,
 	MSM_ENC_TX_COMPLETE,
-	MSM_ENC_VBLANK,
 };
 
 /**