lkml.org 
[lkml]   [2017]   [Feb]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v3 21/24] media: imx: Add MIPI CSI-2 Receiver subdev driver
On Fri, Jan 06, 2017 at 06:11:39PM -0800, Steve Longerbeam wrote:
> +static int imxcsi2_get_fmt(struct v4l2_subdev *sd,
> + struct v4l2_subdev_pad_config *cfg,
> + struct v4l2_subdev_format *sdformat)
> +{
> + struct imxcsi2_dev *csi2 = sd_to_dev(sd);
> +
> + sdformat->format = csi2->format_mbus;
> +
> + return 0;
> +}

Hi Steve,

This isn't correct, and I suspect the other get_fmt implementations are
the same - I've just checked imx-csi.c, and that also appears to have
the same issue.

When get_fmt() is called with sdformat->which == V4L2_SUBDEV_FORMAT_TRY,
you need to return the try format rather than the current format. See
the second paragraph of Documentation/media/uapi/v4l/dev-subdev.rst's
"Format Negotiation" section, where it talks about using
V4L2_SUBDEV_FORMAT_TRY with both VIDIOC_SUBDEV_G_FMT and
VIDIOC_SUBDEV_S_FMT.

--
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.

\
 
 \ /
  Last update: 2017-02-02 00:45    [W:1.968 / U:0.472 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site