diff --git a/drivers/accel/ethosu/ethosu_gem.c b/drivers/accel/ethosu/ethosu_gem.c
index 1daff32610c7..d50fed64d4d9 100644
--- a/drivers/accel/ethosu/ethosu_gem.c
+++ b/drivers/accel/ethosu/ethosu_gem.c
@@ -192,7 +192,15 @@ static u64 dma_length(struct ethosu_validated_cmdstream_info *info,
 	return len;
 }
 
-static u64 feat_matrix_length(struct ethosu_validated_cmdstream_info *info,
+static bool feat_matrix_chained(struct ethosu_device *edev, struct feat_matrix *fm)
+{
+	u32 storage = fm->precision >> 14;
+
+	return !ethosu_is_u65(edev) && storage == 2;
+}
+
+static u64 feat_matrix_length(struct ethosu_device *edev,
+			      struct ethosu_validated_cmdstream_info *info,
 			      struct feat_matrix *fm,
 			      u32 x, u32 y, u32 c, bool ofm)
 {
@@ -203,6 +211,9 @@ static u64 feat_matrix_length(struct ethosu_validated_cmdstream_info *info,
 	if (fm->region < 0)
 		return U64_MAX;
 
+	if (feat_matrix_chained(edev, fm))
+		return 0;
+
 	switch (storage) {
 	case 0:
 		if (x >= fm->width0 + 1) {
@@ -223,6 +234,8 @@ static u64 feat_matrix_length(struct ethosu_validated_cmdstream_info *info,
 			tile = 1;
 		}
 		break;
+	default:
+		return U64_MAX;
 	}
 	if (fm->base[tile] == U64_MAX)
 		return U64_MAX;
@@ -251,6 +264,7 @@ static int calc_sizes(struct drm_device *ddev,
 		      u16 op, struct cmd_state *st,
 		      bool ifm, bool ifm2, bool weight, bool scale)
 {
+	struct ethosu_device *edev = to_ethosu_device(ddev);
 	u64 len;
 
 	if (ifm) {
@@ -268,7 +282,7 @@ static int calc_sizes(struct drm_device *ddev,
 		if (ifm_height < 0 || ifm_width < 0)
 			return -EINVAL;
 
-		len = feat_matrix_length(info, &st->ifm, ifm_width,
+		len = feat_matrix_length(edev, info, &st->ifm, ifm_width,
 					 ifm_height, st->ifm.depth, false);
 		dev_dbg(ddev->dev, "op %d: IFM:%d:0x%llx-0x%llx\n",
 			op, st->ifm.region, st->ifm.base[0], len);
@@ -277,7 +291,7 @@ static int calc_sizes(struct drm_device *ddev,
 	}
 
 	if (ifm2) {
-		len = feat_matrix_length(info, &st->ifm2, st->ifm.depth,
+		len = feat_matrix_length(edev, info, &st->ifm2, st->ifm.depth,
 					 0, st->ofm.depth, false);
 		dev_dbg(ddev->dev, "op %d: IFM2:%d:0x%llx-0x%llx\n",
 			op, st->ifm2.region, st->ifm2.base[0], len);
@@ -309,13 +323,14 @@ static int calc_sizes(struct drm_device *ddev,
 			    st->scale[0].base + st->scale[0].length);
 	}
 
-	len = feat_matrix_length(info, &st->ofm, st->ofm.width,
+	len = feat_matrix_length(edev, info, &st->ofm, st->ofm.width,
 				 st->ofm.height[2], st->ofm.depth, true);
 	dev_dbg(ddev->dev, "op %d: OFM:%d:0x%llx-0x%llx\n",
 		op, st->ofm.region, st->ofm.base[0], len);
 	if (len == U64_MAX)
 		return -EINVAL;
-	info->output_region[st->ofm.region] = true;
+	if (!feat_matrix_chained(edev, &st->ofm))
+		info->output_region[st->ofm.region] = true;
 
 	return 0;
 }
@@ -325,6 +340,7 @@ static int calc_sizes_elemwise(struct drm_device *ddev,
 			       u16 op, struct cmd_state *st,
 			       bool ifm, bool ifm2)
 {
+	struct ethosu_device *edev = to_ethosu_device(ddev);
 	u32 height, width, depth;
 	u64 len;
 
@@ -333,7 +349,7 @@ static int calc_sizes_elemwise(struct drm_device *ddev,
 		width = st->ifm.broadcast & 0x2 ? 0 : st->ofm.width;
 		depth = st->ifm.broadcast & 0x4 ? 0 : st->ofm.depth;
 
-		len = feat_matrix_length(info, &st->ifm, width,
+		len = feat_matrix_length(edev, info, &st->ifm, width,
 					 height, depth, false);
 		dev_dbg(ddev->dev, "op %d: IFM:%d:0x%llx-0x%llx\n",
 			op, st->ifm.region, st->ifm.base[0], len);
@@ -346,7 +362,7 @@ static int calc_sizes_elemwise(struct drm_device *ddev,
 		width = st->ifm2.broadcast & 0x2 ? 0 : st->ofm.width;
 		depth = st->ifm2.broadcast & 0x4 ? 0 : st->ofm.depth;
 
-		len = feat_matrix_length(info, &st->ifm2, width,
+		len = feat_matrix_length(edev, info, &st->ifm2, width,
 					 height, depth, false);
 		dev_dbg(ddev->dev, "op %d: IFM2:%d:0x%llx-0x%llx\n",
 			op, st->ifm2.region, st->ifm2.base[0], len);
@@ -354,13 +370,14 @@ static int calc_sizes_elemwise(struct drm_device *ddev,
 			return -EINVAL;
 	}
 
-	len = feat_matrix_length(info, &st->ofm, st->ofm.width,
+	len = feat_matrix_length(edev, info, &st->ofm, st->ofm.width,
 				 st->ofm.height[2], st->ofm.depth, true);
 	dev_dbg(ddev->dev, "op %d: OFM:%d:0x%llx-0x%llx\n",
 		op, st->ofm.region, st->ofm.base[0], len);
 	if (len == U64_MAX)
 		return -EINVAL;
-	info->output_region[st->ofm.region] = true;
+	if (!feat_matrix_chained(edev, &st->ofm))
+		info->output_region[st->ofm.region] = true;
 
 	return 0;
 }