diff options
Diffstat (limited to 'Documentation/media/uapi/v4l/vidioc-g-edid.rst')
| -rw-r--r-- | Documentation/media/uapi/v4l/vidioc-g-edid.rst | 98 |
1 files changed, 42 insertions, 56 deletions
diff --git a/Documentation/media/uapi/v4l/vidioc-g-edid.rst b/Documentation/media/uapi/v4l/vidioc-g-edid.rst index 1a982b68a72f..a16a193a1cbf 100644 --- a/Documentation/media/uapi/v4l/vidioc-g-edid.rst +++ b/Documentation/media/uapi/v4l/vidioc-g-edid.rst @@ -15,7 +15,18 @@ VIDIOC_G_EDID - VIDIOC_S_EDID - VIDIOC_SUBDEV_G_EDID - VIDIOC_SUBDEV_S_EDID - Ge Synopsis ======== -.. cpp:function:: int ioctl( int fd, int request, struct v4l2_edid *argp ) +.. c:function:: int ioctl( int fd, VIDIOC_G_EDID, struct v4l2_edid *argp ) + :name: VIDIOC_G_EDID + +.. c:function:: int ioctl( int fd, VIDIOC_S_EDID, struct v4l2_edid *argp ) + :name: VIDIOC_S_EDID + + +.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_G_EDID, struct v4l2_edid *argp ) + :name: VIDIOC_SUBDEV_G_EDID + +.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_S_EDID, struct v4l2_edid *argp ) + :name: VIDIOC_SUBDEV_S_EDID Arguments @@ -24,10 +35,6 @@ Arguments ``fd`` File descriptor returned by :ref:`open() <func-open>`. -``request`` - VIDIOC_G_EDID, VIDIOC_S_EDID, VIDIOC_SUBDEV_G_EDID, - VIDIOC_SUBDEV_S_EDID - ``argp`` @@ -67,7 +74,9 @@ total number of available EDID blocks and it will return 0 without copying any data. This is an easy way to discover how many EDID blocks there are. -.. note:: If there are no EDID blocks available at all, then +.. note:: + + If there are no EDID blocks available at all, then the driver will set ``blocks`` to 0 and it returns 0. To set the EDID blocks of a receiver the application has to fill in the @@ -88,62 +97,39 @@ the EDID data in some way. In any case, the end result is the same: the EDID is no longer available. -.. _v4l2-edid: +.. c:type:: v4l2_edid + +.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| .. flat-table:: struct v4l2_edid :header-rows: 0 :stub-columns: 0 :widths: 1 1 2 - - - .. row 1 - - - __u32 - - - ``pad`` - - - Pad for which to get/set the EDID blocks. When used with a video - device node the pad represents the input or output index as - returned by :ref:`VIDIOC_ENUMINPUT` and - :ref:`VIDIOC_ENUMOUTPUT` respectively. - - - .. row 2 - - - __u32 - - - ``start_block`` - - - Read the EDID from starting with this block. Must be 0 when - setting the EDID. - - - .. row 3 - - - __u32 - - - ``blocks`` - - - The number of blocks to get or set. Must be less or equal to 256 - (the maximum number of blocks as defined by the standard). When - you set the EDID and ``blocks`` is 0, then the EDID is disabled or - erased. - - - .. row 4 - - - __u32 - - - ``reserved``\ [5] - - - Reserved for future extensions. Applications and drivers must set - the array to zero. - - - .. row 5 - - - __u8 * - - - ``edid`` - - - Pointer to memory that contains the EDID. The minimum size is - ``blocks`` * 128. + * - __u32 + - ``pad`` + - Pad for which to get/set the EDID blocks. When used with a video + device node the pad represents the input or output index as + returned by :ref:`VIDIOC_ENUMINPUT` and + :ref:`VIDIOC_ENUMOUTPUT` respectively. + * - __u32 + - ``start_block`` + - Read the EDID from starting with this block. Must be 0 when + setting the EDID. + * - __u32 + - ``blocks`` + - The number of blocks to get or set. Must be less or equal to 256 + (the maximum number of blocks as defined by the standard). When + you set the EDID and ``blocks`` is 0, then the EDID is disabled or + erased. + * - __u32 + - ``reserved``\ [5] + - Reserved for future extensions. Applications and drivers must set + the array to zero. + * - __u8 * + - ``edid`` + - Pointer to memory that contains the EDID. The minimum size is + ``blocks`` * 128. Return Value |