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| author | Hans Verkuil <hans.verkuil@cisco.com> | 2012-09-14 06:14:16 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-09-26 09:32:08 -0300 |
| commit | cd56c8dd50fab57520f0cf80cee5de552c1680ed (patch) | |
| tree | 5c145343050e66f482f463defb26fe0c99ed1065 | |
| parent | 93828d6438081649e81b8681df9bf6ad5d691650 (diff) | |
| download | lwn-cd56c8dd50fab57520f0cf80cee5de552c1680ed.tar.gz lwn-cd56c8dd50fab57520f0cf80cee5de552c1680ed.zip | |
[media] DocBook: bus_info can no longer be empty
During the 2012 Media Workshop it was decided that bus_info as returned
by VIDIOC_QUERYCAP can no longer be empty. It should be a unique identifier,
and empty strings are obviously not unique.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | Documentation/DocBook/media/v4l/vidioc-querycap.xml | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/Documentation/DocBook/media/v4l/vidioc-querycap.xml b/Documentation/DocBook/media/v4l/vidioc-querycap.xml index f33dd746b66b..4c70215ae03f 100644 --- a/Documentation/DocBook/media/v4l/vidioc-querycap.xml +++ b/Documentation/DocBook/media/v4l/vidioc-querycap.xml @@ -90,11 +90,13 @@ ambiguities.</entry> <entry>__u8</entry> <entry><structfield>bus_info</structfield>[32]</entry> <entry>Location of the device in the system, a -NUL-terminated ASCII string. For example: "PCI Slot 4". This +NUL-terminated ASCII string. For example: "PCI:0000:05:06.0". This information is intended for users, to distinguish multiple -identical devices. If no such information is available the field may -simply count the devices controlled by the driver, or contain the -empty string (<structfield>bus_info</structfield>[0] = 0).<!-- XXX pci_dev->slot_name example --></entry> +identical devices. If no such information is available the field must +simply count the devices controlled by the driver ("platform:vivi-000"). +The bus_info must start with "PCI:" for PCI boards, "PCIe:" for PCI Express boards, +"usb-" for USB devices, "I2C:" for i2c devices, "ISA:" for ISA devices, +"parport" for parallel port devices and "platform:" for platform devices.</entry> </row> <row> <entry>__u32</entry> |