git.openwrt.org Git - openwrt/staging/linusw.git/blob

   1 From e03a63b8d4a60ee49e3277ac7f7ea4c2998e7938 Mon Sep 17 00:00:00 2001
   2 From: Kieran Bingham <kieran.bingham@ideasonboard.com>
   3 Date: Thu, 10 Oct 2024 14:52:52 +0100
   4 Subject: [PATCH 1325/1350] NotForUpstream: media: video-mux: Propagate
   5  controls to source
   6
   7 The i.MX8MP makes calls on it's source device to determine
   8 the link-frequency that should be configured on the CSI2 receiver.
   9
  10 When the source is behind a video mux, we need to pass this call through
  11 to the connected device.
  12
  13 Map the control handler of the source device to the video-mux,
  14 essentially proxying all controls on the mux to the device which has
  15 it's link enabled.
  16
  17 Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
  18 ---
  19  drivers/media/platform/video-mux.c | 7 +++++++
  20  1 file changed, 7 insertions(+)
  21
  22 --- a/drivers/media/platform/video-mux.c
  23 +++ b/drivers/media/platform/video-mux.c
  24 @@ -69,6 +69,7 @@ static int video_mux_link_setup(struct m
  25                                 const struct media_pad *remote, u32 flags)
  26  {
  27         struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
  28 +       struct v4l2_subdev *source_sd;
  29         struct video_mux *vmux = v4l2_subdev_to_video_mux(sd);
  30         u16 source_pad = entity->num_pads - 1;
  31         int ret = 0;
  32 @@ -111,6 +112,10 @@ static int video_mux_link_setup(struct m
  33                 *source_mbusformat = *v4l2_subdev_get_pad_format(sd, sd_state,
  34                                                                  vmux->active);
  35                 v4l2_subdev_unlock_state(sd_state);
  36 +
  37 +               source_sd = media_entity_to_v4l2_subdev(remote->entity);
  38 +               vmux->subdev.ctrl_handler = source_sd->ctrl_handler;
  39 +
  40         } else {
  41                 if (vmux->active != local->index)
  42                         goto out;
  43 @@ -118,6 +123,8 @@ static int video_mux_link_setup(struct m
  44                 dev_dbg(sd->dev, "going inactive\n");
  45                 mux_control_deselect(vmux->mux);
  46                 vmux->active = -1;
  47 +
  48 +               vmux->subdev.ctrl_handler = NULL;
  49         }
  50
  51  out: