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[media] media: imx: csi: add frame size/interval enumeration 

Add frame size and frame interval enumeration to CSI.

CSI can downscale the image independently horizontally and vertically by a
factor of two, which enumerates to four different frame sizes at the
output pads. The input pad supports a range of frame sizes.

CSI can also drop frames, resulting in frame rate reduction, so
enumerate the resulting possible output frame rates.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Steve Longerbeam <steve_longerbeam@mentor.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Russell King 2017-06-07 15:34:09 -03:00 committed by Mauro Carvalho Chehab
parent 69e78611ff
commit 949ffdbfdb
1 changed files with 70 additions and 0 deletions
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70
drivers/staging/media/imx/imx-media-csi.c
View File

@ -1139,6 +1139,74 @@ static int csi_enum_mbus_code(struct v4l2_subdev *sd,
return ret;
}
static int csi_enum_frame_size(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_frame_size_enum *fse)
{
struct csi_priv *priv = v4l2_get_subdevdata(sd);
struct v4l2_rect *crop;
int ret = 0;
if (fse->pad >= CSI_NUM_PADS ||
fse->index > (fse->pad == CSI_SINK_PAD ? 0 : 3))
return -EINVAL;
mutex_lock(&priv->lock);
if (fse->pad == CSI_SINK_PAD) {
fse->min_width = MIN_W;
fse->max_width = MAX_W;
fse->min_height = MIN_H;
fse->max_height = MAX_H;
} else {
crop = __csi_get_crop(priv, cfg, fse->which);
fse->min_width = fse->max_width = fse->index & 1 ?
crop->width / 2 : crop->width;
fse->min_height = fse->max_height = fse->index & 2 ?
crop->height / 2 : crop->height;
}
mutex_unlock(&priv->lock);
return ret;
}
static int csi_enum_frame_interval(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_frame_interval_enum *fie)
{
struct csi_priv *priv = v4l2_get_subdevdata(sd);
struct v4l2_fract *input_fi;
struct v4l2_rect *crop;
int ret = 0;
if (fie->pad >= CSI_NUM_PADS ||
fie->index >= (fie->pad != CSI_SRC_PAD_IDMAC ?
1 : ARRAY_SIZE(csi_skip)))
return -EINVAL;
mutex_lock(&priv->lock);
input_fi = &priv->frame_interval[CSI_SINK_PAD];
crop = __csi_get_crop(priv, cfg, fie->which);
if ((fie->width != crop->width && fie->width != crop->width / 2) ||
(fie->height != crop->height && fie->height != crop->height / 2)) {
ret = -EINVAL;
goto out;
}
fie->interval = *input_fi;
if (fie->pad == CSI_SRC_PAD_IDMAC)
csi_apply_skip_interval(&csi_skip[fie->index],
&fie->interval);
out:
mutex_unlock(&priv->lock);
return ret;
}
static int csi_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *sdformat)
@ -1606,6 +1674,8 @@ static const struct v4l2_subdev_video_ops csi_video_ops = {
static const struct v4l2_subdev_pad_ops csi_pad_ops = {
.enum_mbus_code = csi_enum_mbus_code,
.enum_frame_size = csi_enum_frame_size,
.enum_frame_interval = csi_enum_frame_interval,
.get_fmt = csi_get_fmt,
.set_fmt = csi_set_fmt,
.get_selection = csi_get_selection,