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[media] mem2mem_testdev: improve field handling 

try_fmt should just set field to NONE and not return an error if
a different field was passed.

buf_prepare should check if the field passed in from userspace has a
supported field value. At the moment only NONE is supported and ANY
is mapped to NONE.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Hans Verkuil 2014-03-10 10:58:29 -03:00 committed by Mauro Carvalho Chehab
parent ca5f5fdb29
commit 5c3112b5be
1 changed files with 10 additions and 11 deletions
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21
drivers/media/platform/mem2mem_testdev.c
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@ -516,19 +516,8 @@ static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
static int vidioc_try_fmt(struct v4l2_format *f, struct m2mtest_fmt *fmt)
{
enum v4l2_field field;
field = f->fmt.pix.field;
if (field == V4L2_FIELD_ANY)
field = V4L2_FIELD_NONE;
else if (V4L2_FIELD_NONE != field)
return -EINVAL;
/* V4L2 specification suggests the driver corrects the format struct
* if any of the dimensions is unsupported */
f->fmt.pix.field = field;
if (f->fmt.pix.height < MIN_H)
f->fmt.pix.height = MIN_H;
else if (f->fmt.pix.height > MAX_H)
@ -542,6 +531,7 @@ static int vidioc_try_fmt(struct v4l2_format *f, struct m2mtest_fmt *fmt)
f->fmt.pix.width &= ~DIM_ALIGN_MASK;
f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
f->fmt.pix.field = V4L2_FIELD_NONE;
f->fmt.pix.priv = 0;
return 0;
@ -760,6 +750,15 @@ static int m2mtest_buf_prepare(struct vb2_buffer *vb)
dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
q_data = get_q_data(ctx, vb->vb2_queue->type);
if (V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
if (vb->v4l2_buf.field == V4L2_FIELD_ANY)
vb->v4l2_buf.field = V4L2_FIELD_NONE;
if (vb->v4l2_buf.field != V4L2_FIELD_NONE) {
dprintk(ctx->dev, "%s field isn't supported\n",
__func__);
return -EINVAL;
}
}
if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n",