diff mbox series

[v5,1/3] media: rkvdec: Fix .buf_prepare

Message ID 20201102190551.1223389-2-adrian.ratiu@collabora.com (mailing list archive)
State New, archived
Headers show
Series media: rkvdec: Add a VP9 backend | expand

Commit Message

Adrian Ratiu Nov. 2, 2020, 7:05 p.m. UTC 
From: Ezequiel Garcia <ezequiel@collabora.com>

The driver should only set the payload on .buf_prepare if the
buffer is CAPTURE type. If an OUTPUT buffer has a zero bytesused
set by userspace then v4l2-core will set it to buffer length.

Fixes: cd33c830448ba ("media: rkvdec: Add the rkvdec driver")
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Adrian Ratiu <adrian.ratiu@collabora.com>
---
 drivers/staging/media/rkvdec/rkvdec.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/staging/media/rkvdec/rkvdec.c b/drivers/staging/media/rkvdec/rkvdec.c
index d25c4a37e2af..0adc3828a4ba 100644
--- a/drivers/staging/media/rkvdec/rkvdec.c
+++ b/drivers/staging/media/rkvdec/rkvdec.c
@@ -471,7 +471,15 @@  static int rkvdec_buf_prepare(struct vb2_buffer *vb)
 		if (vb2_plane_size(vb, i) < sizeimage)
 			return -EINVAL;
 	}
-	vb2_set_plane_payload(vb, 0, f->fmt.pix_mp.plane_fmt[0].sizeimage);
+
+	/*
+	 * Buffer bytesused is written by driver for CAPTURE buffers.
+	 * (if userspace passes 0 bytesused for OUTPUT buffers, v4l2-core sets
+	 * it to buffer length).
+	 */
+	if (!V4L2_TYPE_IS_OUTPUT(vq->type))
+		vb2_set_plane_payload(vb, 0, f->fmt.pix_mp.plane_fmt[0].sizeimage);
+
 	return 0;
 }