Lines Matching +full:chip +full:- +full:selects

1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 VIDIOC_DBG_G_REGISTER - VIDIOC_DBG_S_REGISTER - Read or write hardware registers
55 ``match.type`` and ``match.addr`` or ``match.name`` fields select a chip
66 selects the nth non-sub-device chip on the TV card. The number zero
67 always selects the host chip, e. g. the chip connected to the PCI or USB
72 selects the nth sub-device.
83 We recommended the v4l2-dbg utility over calling these ioctls directly.
84 It is available from the LinuxTV v4l-dvb repository; see
92 .. flat-table:: struct v4l2_dbg_match
93     :header-rows:  0
94     :stub-columns: 0
97     * - __u32
98       - ``type``
99       - See :ref:`chip-match-types` for a list of possible types.
100     * - union {
101       - (anonymous)
102     * - __u32
103       - ``addr``
104       - Match a chip by this number, interpreted according to the ``type``
106     * - char
107       - ``name[32]``
108       - Match a chip by this name, interpreted according to the ``type``
110     * - }
111       -
116 .. flat-table:: struct v4l2_dbg_register
117     :header-rows:  0
118     :stub-columns: 0
120     * - struct v4l2_dbg_match
121       - ``match``
122       - How to match the chip, see :c:type:`v4l2_dbg_match`.
123     * - __u32
124       - ``size``
125       - The register size in bytes.
126     * - __u64
127       - ``reg``
128       - A register number.
129     * - __u64
130       - ``val``
131       - The value read from, or to be written into the register.
136 .. _chip-match-types:
138 .. flat-table:: Chip Match Types
139     :header-rows:  0
140     :stub-columns: 0
143     * - ``V4L2_CHIP_MATCH_BRIDGE``
144       - 0
145       - Match the nth chip on the card, zero for the bridge chip. Does not
146 	match sub-devices.
147     * - ``V4L2_CHIP_MATCH_SUBDEV``
148       - 4
149       - Match the nth sub-device.
154 On success 0 is returned, on error -1 and the ``errno`` variable is set
156 :ref:`Generic Error Codes <gen-errors>` chapter.