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Subject[PATCH 8/8] media: cedrus: Add support for V4L2_DEC_CMD_FLUSH
Date
This command is useful for explicitly flushing last decoded frame.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
.../staging/media/sunxi/cedrus/cedrus_video.c | 34 +++++++++++++++++++
1 file changed, 34 insertions(+)

diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_video.c b/drivers/staging/media/sunxi/cedrus/cedrus_video.c
index 5153b2bba21e..9eae69d5741c 100644
--- a/drivers/staging/media/sunxi/cedrus/cedrus_video.c
+++ b/drivers/staging/media/sunxi/cedrus/cedrus_video.c
@@ -331,6 +331,37 @@ static int cedrus_s_fmt_vid_out(struct file *file, void *priv,
return 0;
}

+static int cedrus_try_decoder_cmd(struct file *file, void *fh,
+ struct v4l2_decoder_cmd *dc)
+{
+ if (dc->cmd != V4L2_DEC_CMD_FLUSH)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int cedrus_decoder_cmd(struct file *file, void *fh,
+ struct v4l2_decoder_cmd *dc)
+{
+ struct cedrus_ctx *ctx = cedrus_file2ctx(file);
+ struct vb2_v4l2_buffer *out_vb, *cap_vb;
+ int ret;
+
+ ret = cedrus_try_decoder_cmd(file, fh, dc);
+ if (ret < 0)
+ return ret;
+
+ out_vb = v4l2_m2m_last_src_buf(ctx->fh.m2m_ctx);
+ cap_vb = v4l2_m2m_last_dst_buf(ctx->fh.m2m_ctx);
+
+ if (out_vb)
+ out_vb->flags &= ~V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF;
+ else if (cap_vb && cap_vb->is_held)
+ v4l2_m2m_buf_done(cap_vb, VB2_BUF_STATE_DONE);
+
+ return 0;
+}
+
const struct v4l2_ioctl_ops cedrus_ioctl_ops = {
.vidioc_querycap = cedrus_querycap,

@@ -355,6 +386,9 @@ const struct v4l2_ioctl_ops cedrus_ioctl_ops = {
.vidioc_streamon = v4l2_m2m_ioctl_streamon,
.vidioc_streamoff = v4l2_m2m_ioctl_streamoff,

+ .vidioc_try_decoder_cmd = cedrus_try_decoder_cmd,
+ .vidioc_decoder_cmd = cedrus_decoder_cmd,
+
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
--
2.22.1
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