[PATCHv10 26/26] v4l: s5p-mfc: support for dmabuf exporting

[Tomasz Stanislawski]

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

Signed-off-by: Tomasz Stanislawski <t.stanislaws at samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
CC: Kamil Debski <k.debski at samsung.com>
Acked-by: Hans Verkuil <hans.verkuil at cisco.com>
---
 drivers/media/platform/s5p-mfc/s5p_mfc_dec.c |   14 ++++++++++++++
 drivers/media/platform/s5p-mfc/s5p_mfc_enc.c |   14 ++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c 
b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
index eb6a70b..6dad9a7 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
@@ -636,6 +636,19 @@ 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);
+
+       if (eb->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
+               return vb2_expbuf(&ctx->vq_src, eb);
+       if (eb->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+               return vb2_expbuf(&ctx->vq_dst, eb);
+       return -EINVAL;
+}
+
 /* Stream on */
 static int vidioc_streamon(struct file *file, void *priv,
                           enum v4l2_buf_type type)
@@ -813,6 +826,7 @@ 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/platform/s5p-mfc/s5p_mfc_enc.c 
b/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
index 2af6d52..22bf684 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
@@ -1165,6 +1165,19 @@ static int vidioc_dqbuf(struct file *file, void *priv, 
struct v4l2_buffer *buf)
        return ret;
 }

+/* 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);
+
+       if (eb->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
+               return vb2_expbuf(&ctx->vq_src, eb);
+       if (eb->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+               return vb2_expbuf(&ctx->vq_dst, eb);
+       return -EINVAL;
+}
+
 /* Stream on */
 static int vidioc_streamon(struct file *file, void *priv,
                           enum v4l2_buf_type type)
@@ -1568,6 +1581,7 @@ 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