[media] s5p-mfc: Flush DPB buffers during stream off

Flushing of delay DPB buffers have to be done during stream off.
In MFC v6, it is done with a risc to host command.
Signed-off-by: Arun Kumar K <arun.kk@samsung.com>
Signed-off-by: Arun Mankuzhi <arun.m@samsung.com>
Acked-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/platform/s5p-mfc/s5p_mfc.c

@@ -686,6 +686,12 @@ static irqreturn_t s5p_mfc_irq(int irq, void *priv)
 		s5p_mfc_handle_stream_complete(ctx, reason, err);
 		break;
 
+	case S5P_MFC_R2H_CMD_DPB_FLUSH_RET:
+		clear_work_bit(ctx);
+		ctx->state = MFCINST_RUNNING;
+		wake_up(&ctx->queue);
+		goto irq_cleanup_hw;
+
 	default:
 		mfc_debug(2, "Unknown int reason\n");
 		s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev);

drivers/media/platform/s5p-mfc/s5p_mfc_common.h

@@ -145,6 +145,7 @@ enum s5p_mfc_inst_state {
 	MFCINST_RETURN_INST,
 	MFCINST_ERROR,
 	MFCINST_ABORT,
+	MFCINST_FLUSH,
 	MFCINST_RES_CHANGE_INIT,
 	MFCINST_RES_CHANGE_FLUSH,
 	MFCINST_RES_CHANGE_END,

drivers/media/platform/s5p-mfc/s5p_mfc_dec.c

@@ -991,24 +991,35 @@ static int s5p_mfc_stop_streaming(struct vb2_queue *q)
 					S5P_MFC_R2H_CMD_FRAME_DONE_RET, 0);
 		aborted = 1;
 	}
-	spin_lock_irqsave(&dev->irqlock, flags);
 	if (q->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
+		spin_lock_irqsave(&dev->irqlock, flags);
 		s5p_mfc_hw_call(dev->mfc_ops, cleanup_queue, &ctx->dst_queue,
 				&ctx->vq_dst);
 		INIT_LIST_HEAD(&ctx->dst_queue);
 		ctx->dst_queue_cnt = 0;
 		ctx->dpb_flush_flag = 1;
 		ctx->dec_dst_flag = 0;
+		spin_unlock_irqrestore(&dev->irqlock, flags);
+		if (IS_MFCV6(dev) && (ctx->state == MFCINST_RUNNING)) {
+			ctx->state = MFCINST_FLUSH;
+			set_work_bit_irqsave(ctx);
+			s5p_mfc_clean_ctx_int_flags(ctx);
+			s5p_mfc_hw_call(dev->mfc_ops, try_run, dev);
+			if (s5p_mfc_wait_for_done_ctx(ctx,
+				S5P_MFC_R2H_CMD_DPB_FLUSH_RET, 0))
+				mfc_err("Err flushing buffers\n");
+		}
 	}
 	if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
+		spin_lock_irqsave(&dev->irqlock, flags);
 		s5p_mfc_hw_call(dev->mfc_ops, cleanup_queue, &ctx->src_queue,
 				&ctx->vq_src);
 		INIT_LIST_HEAD(&ctx->src_queue);
 		ctx->src_queue_cnt = 0;
+		spin_unlock_irqrestore(&dev->irqlock, flags);
 	}
 	if (aborted)
 		ctx->state = MFCINST_RUNNING;
-	spin_unlock_irqrestore(&dev->irqlock, flags);
 	return 0;
 }
 

drivers/media/platform/s5p-mfc/s5p_mfc_opr_v6.c

@@ -1253,12 +1253,14 @@ int s5p_mfc_init_decode_v6(struct s5p_mfc_ctx *ctx)
 static inline void s5p_mfc_set_flush(struct s5p_mfc_ctx *ctx, int flush)
 {
 	struct s5p_mfc_dev *dev = ctx->dev;
-	unsigned int dpb;
-	if (flush)
-		dpb = READL(S5P_FIMV_SI_CH0_DPB_CONF_CTRL) | (1 << 14);
-	else
-		dpb = READL(S5P_FIMV_SI_CH0_DPB_CONF_CTRL) & ~(1 << 14);
-	WRITEL(dpb, S5P_FIMV_SI_CH0_DPB_CONF_CTRL);
+
+	if (flush) {
+		dev->curr_ctx = ctx->num;
+		s5p_mfc_clean_ctx_int_flags(ctx);
+		WRITEL(ctx->inst_no, S5P_FIMV_INSTANCE_ID_V6);
+		s5p_mfc_hw_call(dev->mfc_cmds, cmd_host2risc, dev,
+				S5P_FIMV_H2R_CMD_FLUSH_V6, NULL);
+	}
 }
 
 /* Decode a single frame */
@@ -1650,6 +1652,9 @@ void s5p_mfc_try_run_v6(struct s5p_mfc_dev *dev)
 		case MFCINST_HEAD_PARSED:
 			ret = s5p_mfc_run_init_dec_buffers(ctx);
 			break;
+		case MFCINST_FLUSH:
+			s5p_mfc_set_flush(ctx, ctx->dpb_flush_flag);
+			break;
 		case MFCINST_RES_CHANGE_INIT:
 			s5p_mfc_run_dec_last_frames(ctx);
 			break;