target/linux/bcm27xx/patches-5.4/950-0795-media-v4l2-subdev-Introduce-get-set-_mbus_config-pad.patch

   1 From 487203abdef24b7d3cdd110f1b1e699fd22aa02c Mon Sep 17 00:00:00 2001
   2 From: Jacopo Mondi <jacopo+renesas@jmondi.org>
   3 Date: Tue, 16 Jun 2020 16:12:36 +0200
   4 Subject: [PATCH]_mbus_config
   5  pad ops
   6
   7 Upstream https://patchwork.linuxtv.org/patch/64669/
   8
   9 Introduce two new pad operations to allow retrieving and configuring the
  10 media bus parameters on a subdevice pad.
  11
  12 The newly introduced operations aims to replace the s/g_mbus_config video
  13 operations, which have been on their way for deprecation since a long
  14 time.
  15
  16 Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
  17 ---
  18  include/media/v4l2-subdev.h | 27 +++++++++++++++++++++++++++
  19  1 file changed, 27 insertions(+)
  20
  21 --- a/include/media/v4l2-subdev.h
  22 +++ b/include/media/v4l2-subdev.h
  23 @@ -670,6 +670,29 @@ struct v4l2_subdev_pad_config {
  24   *
  25   * @set_frame_desc: set the low level media bus frame parameters, @fd array
  26   *                  may be adjusted by the subdev driver to device capabilities.
  27 + *
  28 + * @get_mbus_config: get the media bus configuration of a remote sub-device.
  29 + *                  The media bus configuration is usually retrieved from the
  30 + *                  firmware interface at sub-device probe time, immediately
  31 + *                  applied to the hardware and eventually adjusted by the
  32 + *                  driver. Remote sub-devices (usually video receivers) shall
  33 + *                  use this operation to query the transmitting end bus
  34 + *                  configuration in order to adjust their own one accordingly.
  35 + *                  Callers should make sure they get the most up-to-date as
  36 + *                  possible configuration from the remote end, likely calling
  37 + *                  this operation as close as possible to stream on time. The
  38 + *                  operation shall fail if the pad index it has been called on
  39 + *                  is not valid.
  40 + *
  41 + * @set_mbus_config: set the media bus configuration of a remote sub-device.
  42 + *                  This operations is intended to allow, in combination with
  43 + *                  the get_mbus_config operation, the negotiation of media bus
  44 + *                  configuration parameters between media sub-devices. The
  45 + *                  operation shall not fail if the requested configuration is
  46 + *                  not supported, but the driver shall update the content of
  47 + *                  the %config argument to reflect what has been actually
  48 + *                  applied to the hardware. The operation shall fail if the
  49 + *                  pad index it has been called on is not valid.
  50   */
  51  struct v4l2_subdev_pad_ops {
  52         int (*init_cfg)(struct v4l2_subdev *sd,
  53 @@ -710,6 +733,10 @@ struct v4l2_subdev_pad_ops {
  54                               struct v4l2_mbus_frame_desc *fd);
  55         int (*set_frame_desc)(struct v4l2_subdev *sd, unsigned int pad,
  56                               struct v4l2_mbus_frame_desc *fd);
  57 +       int (*get_mbus_config)(struct v4l2_subdev *sd, unsigned int pad,
  58 +                              struct v4l2_mbus_config *config);
  59 +       int (*set_mbus_config)(struct v4l2_subdev *sd, unsigned int pad,
  60 +                              struct v4l2_mbus_config *config);
  61  };
  62
  63  /**