From: Chen-Yu Tsai wenst@chromium.org
[ Upstream commit 309373a3571ef7175bd9da0c9b13476a718e8478 ]
The payload size for encoder capture buffers is set by the driver upon finishing encoding each frame, based on the encoded length returned from hardware, and whatever header and padding length used. Setting a non-zero default serves no real purpose, and also causes issues if the capture buffer is returned to userspace unused, confusing the application.
Instead, always set the payload size to 0 for encoder capture buffers when preparing them.
Fixes: 775fec69008d ("media: add Rockchip VPU JPEG encoder driver") Fixes: 082aaecff35f ("media: hantro: Fix .buf_prepare") Signed-off-by: Chen-Yu Tsai wenst@chromium.org Reviewed-by: Ezequiel Garcia ezequiel@vanguardiasur.com.ar Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Mauro Carvalho Chehab mchehab@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/staging/media/hantro/hantro_v4l2.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/media/hantro/hantro_v4l2.c b/drivers/staging/media/hantro/hantro_v4l2.c index 5c2ca61add8e..b65f2f3ef357 100644 --- a/drivers/staging/media/hantro/hantro_v4l2.c +++ b/drivers/staging/media/hantro/hantro_v4l2.c @@ -644,8 +644,12 @@ static int hantro_buf_prepare(struct vb2_buffer *vb) * (for OUTPUT buffers, if userspace passes 0 bytesused, v4l2-core sets * it to buffer length). */ - if (V4L2_TYPE_IS_CAPTURE(vq->type)) - vb2_set_plane_payload(vb, 0, pix_fmt->plane_fmt[0].sizeimage); + if (V4L2_TYPE_IS_CAPTURE(vq->type)) { + if (ctx->is_encoder) + vb2_set_plane_payload(vb, 0, 0); + else + vb2_set_plane_payload(vb, 0, pix_fmt->plane_fmt[0].sizeimage); + }
return 0; }