On 03/19/2017 03:49 AM, Russell King wrote:
Add support for enumerating frame sizes and frame intervals from the
first subdev via the V4L2 interfaces.
Signed-off-by: Russell King <rmk+ker...@armlinux.org.uk>
---
drivers/staging/media/imx/imx-media-capture.c | 62 +++++++++++++++++++++++++++
1 file changed, 62 insertions(+)
diff --git a/drivers/staging/media/imx/imx-media-capture.c
b/drivers/staging/media/imx/imx-media-capture.c
index cdeb2cd8b1d7..bc99d9310e36 100644
--- a/drivers/staging/media/imx/imx-media-capture.c
+++ b/drivers/staging/media/imx/imx-media-capture.c
@@ -82,6 +82,65 @@ static int vidioc_querycap(struct file *file, void *fh,
return 0;
}
+static int capture_enum_framesizes(struct file *file, void *fh,
+ struct v4l2_frmsizeenum *fsize)
+{
+ struct capture_priv *priv = video_drvdata(file);
+ const struct imx_media_pixfmt *cc;
+ struct v4l2_subdev_frame_size_enum fse = {
+ .index = fsize->index,
+ .pad = priv->src_sd_pad,
+ .which = V4L2_SUBDEV_FORMAT_ACTIVE,
+ };
+ int ret;
+
+ cc = imx_media_find_format(fsize->pixel_format, CS_SEL_ANY, true);
+ if (!cc)
+ return -EINVAL;
+
+ fse.code = cc->codes[0];
+
+ ret = v4l2_subdev_call(priv->src_sd, pad, enum_frame_size, NULL, &fse);
+ if (ret)
+ return ret;
+
+ fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
+ fsize->discrete.width = fse.min_width;
+ fsize->discrete.height = fse.max_height;
+
+ return 0;
+}
The PRP ENC/VF subdevices will return a continuous range of
supported frame sizes at their source pad, so this should be
modified to:
...
if (fse.min_width == fse.max_width &&
fse.min_height == fse.max_height) {
fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
fsize->discrete.width = fse.min_width;
fsize->discrete.height = fse.min_height;
} else {
fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS;
fsize->stepwise.min_width = fse.min_width;
fsize->stepwise.max_width = fse.max_width;
fsize->stepwise.min_height = fse.min_height;
fsize->stepwise.max_height = fse.max_height;
fsize->stepwise.step_width = 1;
fsize->stepwise.step_height = 1;
}
...
Steve
+
+static int capture_enum_frameintervals(struct file *file, void *fh,
+ struct v4l2_frmivalenum *fival)
+{
+ struct capture_priv *priv = video_drvdata(file);
+ const struct imx_media_pixfmt *cc;
+ struct v4l2_subdev_frame_interval_enum fie = {
+ .index = fival->index,
+ .pad = priv->src_sd_pad,
+ .width = fival->width,
+ .height = fival->height,
+ .which = V4L2_SUBDEV_FORMAT_ACTIVE,
+ };
+ int ret;
+
+ cc = imx_media_find_format(fival->pixel_format, CS_SEL_ANY, true);
+ if (!cc)
+ return -EINVAL;
+
+ fie.code = cc->codes[0];
+
+ ret = v4l2_subdev_call(priv->src_sd, pad, enum_frame_interval, NULL,
&fie);
+ if (ret)
+ return ret;
+
+ fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
+ fival->discrete = fie.interval;
+
+ return 0;
+}
+
static int capture_enum_fmt_vid_cap(struct file *file, void *fh,
struct v4l2_fmtdesc *f)
{
@@ -270,6 +329,9 @@ static int capture_s_parm(struct file *file, void *fh,
static const struct v4l2_ioctl_ops capture_ioctl_ops = {
.vidioc_querycap = vidioc_querycap,
+ .vidioc_enum_framesizes = capture_enum_framesizes,
+ .vidioc_enum_frameintervals = capture_enum_frameintervals,
+
.vidioc_enum_fmt_vid_cap = capture_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = capture_g_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = capture_try_fmt_vid_cap,
