[PATCH v1 1/7] media: verisilicon: Add helpers to allocate and free auxiliary buffers

[Benjamin Gaignard <benjamin.gaignard@collabora.com>]

Add helpers functions to allocate and free the auxiliary buffers.
That simplify the code and make it more easy to read and maintain.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
---
 drivers/media/platform/verisilicon/hantro.h   |  4 +++
 .../platform/verisilicon/hantro_postproc.c    | 21 ++---------
 .../media/platform/verisilicon/hantro_v4l2.c  | 35 +++++++++++++++++++
 3 files changed, 42 insertions(+), 18 deletions(-)

diff --git a/drivers/media/platform/verisilicon/hantro.h b/drivers/media/platform/verisilicon/hantro.h
index 0353de154a1e..f2f02522a543 100644
--- a/drivers/media/platform/verisilicon/hantro.h
+++ b/drivers/media/platform/verisilicon/hantro.h
@@ -507,4 +507,8 @@ void hantro_postproc_free(struct hantro_ctx *ctx);
 int hanto_postproc_enum_framesizes(struct hantro_ctx *ctx,
 				   struct v4l2_frmsizeenum *fsize);
 
+int hantro_allocate_aux_buf(struct hantro_ctx *ctx, struct hantro_aux_buf *aux_buf,
+			    size_t size);
+void hantro_free_aux_buf(struct hantro_ctx *ctx, struct hantro_aux_buf *aux_buf);
+
 #endif /* HANTRO_H_ */
diff --git a/drivers/media/platform/verisilicon/hantro_postproc.c b/drivers/media/platform/verisilicon/hantro_postproc.c
index e94d1ba5ef10..3e202076bd2f 100644
--- a/drivers/media/platform/verisilicon/hantro_postproc.c
+++ b/drivers/media/platform/verisilicon/hantro_postproc.c
@@ -180,7 +180,6 @@ static int hantro_postproc_g2_enum_framesizes(struct hantro_ctx *ctx,
 
 void hantro_postproc_free(struct hantro_ctx *ctx)
 {
-	struct hantro_dev *vpu = ctx->dev;
 	struct v4l2_m2m_ctx *m2m_ctx = ctx->fh.m2m_ctx;
 	struct vb2_queue *queue = &m2m_ctx->cap_q_ctx.q;
 	unsigned int i;
@@ -188,11 +187,7 @@ void hantro_postproc_free(struct hantro_ctx *ctx)
 	for (i = 0; i < queue->max_num_buffers; ++i) {
 		struct hantro_aux_buf *priv = &ctx->postproc.dec_q[i];
 
-		if (priv->cpu) {
-			dma_free_attrs(vpu->dev, priv->size, priv->cpu,
-				       priv->dma, priv->attrs);
-			priv->cpu = NULL;
-		}
+		hantro_free_aux_buf(ctx, priv);
 	}
 }
 
@@ -223,7 +218,6 @@ static unsigned int hantro_postproc_buffer_size(struct hantro_ctx *ctx)
 
 static int hantro_postproc_alloc(struct hantro_ctx *ctx, int index)
 {
-	struct hantro_dev *vpu = ctx->dev;
 	struct hantro_aux_buf *priv = &ctx->postproc.dec_q[index];
 	unsigned int buf_size = hantro_postproc_buffer_size(ctx);
 
@@ -235,13 +229,7 @@ static int hantro_postproc_alloc(struct hantro_ctx *ctx, int index)
 	 * buffers for the decoder, so no mapping is needed.
 	 */
 	priv->attrs = DMA_ATTR_NO_KERNEL_MAPPING;
-	priv->cpu = dma_alloc_attrs(vpu->dev, buf_size, &priv->dma,
-				    GFP_KERNEL, priv->attrs);
-	if (!priv->cpu)
-		return -ENOMEM;
-	priv->size = buf_size;
-
-	return 0;
+	return hantro_allocate_aux_buf(ctx, priv, buf_size);
 }
 
 int hantro_postproc_init(struct hantro_ctx *ctx)
@@ -268,14 +256,11 @@ hantro_postproc_get_dec_buf_addr(struct hantro_ctx *ctx, int index)
 {
 	struct hantro_aux_buf *priv = &ctx->postproc.dec_q[index];
 	unsigned int buf_size = hantro_postproc_buffer_size(ctx);
-	struct hantro_dev *vpu = ctx->dev;
 	int ret;
 
 	if (priv->size < buf_size && priv->cpu) {
 		/* buffer is too small, release it */
-		dma_free_attrs(vpu->dev, priv->size, priv->cpu,
-			       priv->dma, priv->attrs);
-		priv->cpu = NULL;
+		hantro_free_aux_buf(ctx, priv);
 	}
 
 	if (!priv->cpu) {
diff --git a/drivers/media/platform/verisilicon/hantro_v4l2.c b/drivers/media/platform/verisilicon/hantro_v4l2.c
index 83af9fa1ce94..ec12950a1ae1 100644
--- a/drivers/media/platform/verisilicon/hantro_v4l2.c
+++ b/drivers/media/platform/verisilicon/hantro_v4l2.c
@@ -1029,3 +1029,38 @@ const struct vb2_ops hantro_queue_ops = {
 	.start_streaming = hantro_start_streaming,
 	.stop_streaming = hantro_stop_streaming,
 };
+
+int hantro_allocate_aux_buf(struct hantro_ctx *ctx, struct hantro_aux_buf *aux_buf,
+			    size_t size)
+{
+	struct hantro_dev *vpu = ctx->dev;
+
+	if (!aux_buf || !ctx || !size)
+		return -EINVAL;
+
+	aux_buf->cpu = dma_alloc_attrs(vpu->dev, size,
+				       &aux_buf->dma,
+				       GFP_KERNEL,
+				       aux_buf->attrs);
+	if (!aux_buf->cpu)
+		return -ENOMEM;
+
+	aux_buf->size = size;
+
+	return 0;
+}
+
+void hantro_free_aux_buf(struct hantro_ctx *ctx, struct hantro_aux_buf *aux_buf)
+{
+	struct hantro_dev *vpu = ctx->dev;
+
+	if (!aux_buf || !ctx)
+		return;
+
+	if (aux_buf->cpu)
+		dma_free_attrs(vpu->dev, aux_buf->size,
+			       aux_buf->cpu, aux_buf->dma,
+			       aux_buf->attrs);
+	aux_buf->cpu = NULL;
+	aux_buf->size = 0;
+}
-- 
2.53.0