[PATCHv2 8/9] v4l: s5p-mfc: support for dmabuf exporting

[Tomasz Stanislawski <t.stanislaws@samsung.com>]

This patch enhances s5p-mfc with support for DMABUF exporting via
VIDIOC_EXPBUF ioctl.

Signed-off-by: Tomasz Stanislawski <t.stanislaws@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
CC: Kamil Debski <k.debski@samsung.com>
---
 drivers/media/video/s5p-mfc/s5p_mfc_dec.c |   18 ++++++++++++++++++
 drivers/media/video/s5p-mfc/s5p_mfc_enc.c |   18 ++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/drivers/media/video/s5p-mfc/s5p_mfc_dec.c b/drivers/media/video/s5p-mfc/s5p_mfc_dec.c
index c25ec02..8344ce5 100644
--- a/drivers/media/video/s5p-mfc/s5p_mfc_dec.c
+++ b/drivers/media/video/s5p-mfc/s5p_mfc_dec.c
@@ -564,6 +564,23 @@ static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
 	return -EINVAL;
 }
 
+/* Export DMA buffer */
+static int vidioc_expbuf(struct file *file, void *priv,
+	struct v4l2_exportbuffer *eb)
+{
+	struct s5p_mfc_ctx *ctx = fh_to_ctx(priv);
+	int ret;
+
+	if (eb->mem_offset < DST_QUEUE_OFF_BASE)
+		return vb2_expbuf(&ctx->vq_src, eb);
+
+	eb->mem_offset -= DST_QUEUE_OFF_BASE;
+	ret = vb2_expbuf(&ctx->vq_dst, eb);
+	eb->mem_offset += DST_QUEUE_OFF_BASE;
+
+	return ret;
+}
+
 /* Stream on */
 static int vidioc_streamon(struct file *file, void *priv,
 			   enum v4l2_buf_type type)
@@ -739,6 +756,7 @@ static const struct v4l2_ioctl_ops s5p_mfc_dec_ioctl_ops = {
 	.vidioc_querybuf = vidioc_querybuf,
 	.vidioc_qbuf = vidioc_qbuf,
 	.vidioc_dqbuf = vidioc_dqbuf,
+	.vidioc_expbuf = vidioc_expbuf,
 	.vidioc_streamon = vidioc_streamon,
 	.vidioc_streamoff = vidioc_streamoff,
 	.vidioc_g_crop = vidioc_g_crop,
diff --git a/drivers/media/video/s5p-mfc/s5p_mfc_enc.c b/drivers/media/video/s5p-mfc/s5p_mfc_enc.c
index acedb20..db110c5 100644
--- a/drivers/media/video/s5p-mfc/s5p_mfc_enc.c
+++ b/drivers/media/video/s5p-mfc/s5p_mfc_enc.c
@@ -1141,6 +1141,23 @@ static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
 	return -EINVAL;
 }
 
+/* Export DMA buffer */
+static int vidioc_expbuf(struct file *file, void *priv,
+	struct v4l2_exportbuffer *eb)
+{
+	struct s5p_mfc_ctx *ctx = fh_to_ctx(priv);
+	int ret;
+
+	if (eb->mem_offset < DST_QUEUE_OFF_BASE)
+		return vb2_expbuf(&ctx->vq_src, eb);
+
+	eb->mem_offset -= DST_QUEUE_OFF_BASE;
+	ret = vb2_expbuf(&ctx->vq_dst, eb);
+	eb->mem_offset += DST_QUEUE_OFF_BASE;
+
+	return ret;
+}
+
 /* Stream on */
 static int vidioc_streamon(struct file *file, void *priv,
 			   enum v4l2_buf_type type)
@@ -1486,6 +1503,7 @@ static const struct v4l2_ioctl_ops s5p_mfc_enc_ioctl_ops = {
 	.vidioc_querybuf = vidioc_querybuf,
 	.vidioc_qbuf = vidioc_qbuf,
 	.vidioc_dqbuf = vidioc_dqbuf,
+	.vidioc_expbuf = vidioc_expbuf,
 	.vidioc_streamon = vidioc_streamon,
 	.vidioc_streamoff = vidioc_streamoff,
 	.vidioc_s_parm = vidioc_s_parm,
-- 
1.7.9.5