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Merge branch 'master' into for-next 

Sync with Linus' tree to be able to apply patch to a newer
code (namely drivers/gpu/drm/gma500/psb_intel_lvds.c)
This commit is contained in:
Jiri Kosina 2012-02-03 23:12:42 +01:00
parent 5196d20305 7c7ed8ec33
commit 972c5ae961
6622 changed files with 311684 additions and 152316 deletions
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5
CREDITS
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@ -514,6 +514,11 @@ S: Bessemerstraat 21
S: Amsterdam
S: The Netherlands
N: NeilBrown
E: neil@brown.name
P: 4096R/566281B9 1BC6 29EB D390 D870 7B5F 497A 39EC 9EDD 5662 81B9
D: NFSD Maintainer 2000-2007
N: Zach Brown
E: zab@zabbo.net
D: maestro pci sound

75
Documentation/ABI/stable/sysfs-bus-xen-backend Normal file
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@ -0,0 +1,75 @@
What: /sys/bus/xen-backend/devices/*/devtype
Date: Feb 2009
KernelVersion: 2.6.38
Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Description:
The type of the device. e.g., one of: 'vbd' (block),
'vif' (network), or 'vfb' (framebuffer).
What: /sys/bus/xen-backend/devices/*/nodename
Date: Feb 2009
KernelVersion: 2.6.38
Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Description:
XenStore node (under /local/domain/NNN/) for this
backend device.
What: /sys/bus/xen-backend/devices/vbd-*/physical_device
Date: April 2011
KernelVersion: 3.0
Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Description:
The major:minor number (in hexidecimal) of the
physical device providing the storage for this backend
block device.
What: /sys/bus/xen-backend/devices/vbd-*/mode
Date: April 2011
KernelVersion: 3.0
Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Description:
Whether the block device is read-only ('r') or
read-write ('w').
What: /sys/bus/xen-backend/devices/vbd-*/statistics/f_req
Date: April 2011
KernelVersion: 3.0
Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Description:
Number of flush requests from the frontend.
What: /sys/bus/xen-backend/devices/vbd-*/statistics/oo_req
Date: April 2011
KernelVersion: 3.0
Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Description:
Number of requests delayed because the backend was too
busy processing previous requests.
What: /sys/bus/xen-backend/devices/vbd-*/statistics/rd_req
Date: April 2011
KernelVersion: 3.0
Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Description:
Number of read requests from the frontend.
What: /sys/bus/xen-backend/devices/vbd-*/statistics/rd_sect
Date: April 2011
KernelVersion: 3.0
Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Description:
Number of sectors read by the frontend.
What: /sys/bus/xen-backend/devices/vbd-*/statistics/wr_req
Date: April 2011
KernelVersion: 3.0
Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Description:
Number of write requests from the frontend.
What: /sys/bus/xen-backend/devices/vbd-*/statistics/wr_sect
Date: April 2011
KernelVersion: 3.0
Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Description:
Number of sectors written by the frontend.

77
Documentation/ABI/stable/sysfs-devices-system-xen_memory Normal file
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@ -0,0 +1,77 @@
What: /sys/devices/system/xen_memory/xen_memory0/max_retry_count
Date: May 2011
KernelVersion: 2.6.39
Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Description:
The maximum number of times the balloon driver will
attempt to increase the balloon before giving up. See
also 'retry_count' below.
A value of zero means retry forever and is the default one.
What: /sys/devices/system/xen_memory/xen_memory0/max_schedule_delay
Date: May 2011
KernelVersion: 2.6.39
Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Description:
The limit that 'schedule_delay' (see below) will be
increased to. The default value is 32 seconds.
What: /sys/devices/system/xen_memory/xen_memory0/retry_count
Date: May 2011
KernelVersion: 2.6.39
Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Description:
The current number of times that the balloon driver
has attempted to increase the size of the balloon.
The default value is one. With max_retry_count being
zero (unlimited), this means that the driver will attempt
to retry with a 'schedule_delay' delay.
What: /sys/devices/system/xen_memory/xen_memory0/schedule_delay
Date: May 2011
KernelVersion: 2.6.39
Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Description:
The time (in seconds) to wait between attempts to
increase the balloon. Each time the balloon cannot be
increased, 'schedule_delay' is increased (until
'max_schedule_delay' is reached at which point it
will use the max value).
What: /sys/devices/system/xen_memory/xen_memory0/target
Date: April 2008
KernelVersion: 2.6.26
Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Description:
The target number of pages to adjust this domain's
memory reservation to.
What: /sys/devices/system/xen_memory/xen_memory0/target_kb
Date: April 2008
KernelVersion: 2.6.26
Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Description:
As target above, except the value is in KiB.
What: /sys/devices/system/xen_memory/xen_memory0/info/current_kb
Date: April 2008
KernelVersion: 2.6.26
Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Description:
Current size (in KiB) of this domain's memory
reservation.
What: /sys/devices/system/xen_memory/xen_memory0/info/high_kb
Date: April 2008
KernelVersion: 2.6.26
Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Description:
Amount (in KiB) of high memory in the balloon.
What: /sys/devices/system/xen_memory/xen_memory0/info/low_kb
Date: April 2008
KernelVersion: 2.6.26
Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Description:
Amount (in KiB) of low (or normal) memory in the
balloon.

18
Documentation/ABI/testing/sysfs-bus-pci
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@ -66,6 +66,24 @@ Description:
re-discover previously removed devices.
Depends on CONFIG_HOTPLUG.
What: /sys/bus/pci/devices/.../msi_irqs/
Date: September, 2011
Contact: Neil Horman <nhorman@tuxdriver.com>
Description:
The /sys/devices/.../msi_irqs directory contains a variable set
of sub-directories, with each sub-directory being named after a
corresponding msi irq vector allocated to that device. Each
numbered sub-directory N contains attributes of that irq.
Note that this directory is not created for device drivers which
do not support msi irqs
What: /sys/bus/pci/devices/.../msi_irqs/<N>/mode
Date: September 2011
Contact: Neil Horman <nhorman@tuxdriver.com>
Description:
This attribute indicates the mode that the irq vector named by
the parent directory is in (msi vs. msix)
What: /sys/bus/pci/devices/.../remove
Date: January 2009
Contact: Linux PCI developers <linux-pci@vger.kernel.org>

25
Documentation/ABI/testing/sysfs-bus-usb
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@ -119,6 +119,31 @@ Description:
Write a 1 to force the device to disconnect
(equivalent to unplugging a wired USB device).
What: /sys/bus/usb/drivers/.../new_id
Date: October 2011
Contact: linux-usb@vger.kernel.org
Description:
Writing a device ID to this file will attempt to
dynamically add a new device ID to a USB device driver.
This may allow the driver to support more hardware than
was included in the driver's static device ID support
table at compile time. The format for the device ID is:
idVendor idProduct bInterfaceClass.
The vendor ID and device ID fields are required, the
interface class is optional.
Upon successfully adding an ID, the driver will probe
for the device and attempt to bind to it. For example:
# echo "8086 10f5" > /sys/bus/usb/drivers/foo/new_id
What: /sys/bus/usb-serial/drivers/.../new_id
Date: October 2011
Contact: linux-usb@vger.kernel.org
Description:
For serial USB drivers, this attribute appears under the
extra bus folder "usb-serial" in sysfs; apart from that
difference, all descriptions from the entry
"/sys/bus/usb/drivers/.../new_id" apply.
What: /sys/bus/usb/drivers/.../remove_id
Date: November 2009
Contact: CHENG Renquan <rqcheng@smu.edu.sg>

12
Documentation/ABI/testing/sysfs-class-rtc-rtc0-device-rtc_calibration Normal file
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@ -0,0 +1,12 @@
What: Attribute for calibrating ST-Ericsson AB8500 Real Time Clock
Date: Oct 2011
KernelVersion: 3.0
Contact: Mark Godfrey <mark.godfrey@stericsson.com>
Description: The rtc_calibration attribute allows the userspace to
calibrate the AB8500.s 32KHz Real Time Clock.
Every 60 seconds the AB8500 will correct the RTC's value
by adding to it the value of this attribute.
The range of the attribute is -127 to +127 in units of
30.5 micro-seconds (half-parts-per-million of the 32KHz clock)
Users: The /vendor/st-ericsson/base_utilities/core/rtc_calibration
daemon uses this interface.

34
Documentation/ABI/testing/sysfs-devices-platform-docg3 Normal file
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@ -0,0 +1,34 @@
What: /sys/devices/platform/docg3/f[0-3]_dps[01]_is_keylocked
Date: November 2011
KernelVersion: 3.3
Contact: Robert Jarzmik <robert.jarzmik@free.fr>
Description:
Show whether the floor (0 to 4), protection area (0 or 1) is
keylocked. Each docg3 chip (or floor) has 2 protection areas,
which can cover any part of it, block aligned, called DPS.
The protection has information embedded whether it blocks reads,
writes or both.
The result is:
0 -> the DPS is not keylocked
1 -> the DPS is keylocked
Users: None identified so far.
What: /sys/devices/platform/docg3/f[0-3]_dps[01]_protection_key
Date: November 2011
KernelVersion: 3.3
Contact: Robert Jarzmik <robert.jarzmik@free.fr>
Description:
Enter the protection key for the floor (0 to 4), protection area
(0 or 1). Each docg3 chip (or floor) has 2 protection areas,
which can cover any part of it, block aligned, called DPS.
The protection has information embedded whether it blocks reads,
writes or both.
The protection key is a string of 8 bytes (value 0-255).
Entering the correct value toggle the lock, and can be observed
through f[0-3]_dps[01]_is_keylocked.
Possible values are:
- 8 bytes
Typical values are:
- "00000000"
- "12345678"
Users: None identified so far.

9
Documentation/ABI/testing/sysfs-driver-hid-multitouch Normal file
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@ -0,0 +1,9 @@
What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/quirks
Date: November 2011
Contact: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Description: The integer value of this attribute corresponds to the
quirks actually in place to handle the device's protocol.
When read, this attribute returns the current settings (see
MT_QUIRKS_* in hid-multitouch.c).
When written this attribute change on the fly the quirks, then
the protocol to handle the device.

135
Documentation/ABI/testing/sysfs-driver-hid-roccat-isku Normal file
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@ -0,0 +1,135 @@
What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/isku/roccatisku<minor>/actual_profile
Date: June 2011
Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
Description: The integer value of this attribute ranges from 0-4.
When read, this attribute returns the number of the actual
profile. This value is persistent, so its equivalent to the
profile that's active when the device is powered on next time.
When written, this file sets the number of the startup profile
and the device activates this profile immediately.
Users: http://roccat.sourceforge.net
What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/isku/roccatisku<minor>/info
Date: June 2011
Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
Description: When read, this file returns general data like firmware version.
The data is 6 bytes long.
This file is readonly.
Users: http://roccat.sourceforge.net
What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/isku/roccatisku<minor>/key_mask
Date: June 2011
Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
Description: When written, this file lets one deactivate certain keys like
windows and application keys, to prevent accidental presses.
Profile number for which this settings occur is included in
written data. The data has to be 6 bytes long.
Before reading this file, control has to be written to select
which profile to read.
Users: http://roccat.sourceforge.net
What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/isku/roccatisku<minor>/keys_capslock
Date: June 2011
Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
Description: When written, this file lets one set the function of the
capslock key for a specific profile. Profile number is included
in written data. The data has to be 6 bytes long.
Before reading this file, control has to be written to select
which profile to read.
Users: http://roccat.sourceforge.net
What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/isku/roccatisku<minor>/keys_easyzone
Date: June 2011
Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
Description: When written, this file lets one set the function of the
easyzone keys for a specific profile. Profile number is included
in written data. The data has to be 65 bytes long.
Before reading this file, control has to be written to select
which profile to read.
Users: http://roccat.sourceforge.net
What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/isku/roccatisku<minor>/keys_function
Date: June 2011
Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
Description: When written, this file lets one set the function of the
function keys for a specific profile. Profile number is included
in written data. The data has to be 41 bytes long.
Before reading this file, control has to be written to select
which profile to read.
Users: http://roccat.sourceforge.net
What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/isku/roccatisku<minor>/keys_macro
Date: June 2011
Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
Description: When written, this file lets one set the function of the macro
keys for a specific profile. Profile number is included in
written data. The data has to be 35 bytes long.
Before reading this file, control has to be written to select
which profile to read.
Users: http://roccat.sourceforge.net
What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/isku/roccatisku<minor>/keys_media
Date: June 2011
Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
Description: When written, this file lets one set the function of the media
keys for a specific profile. Profile number is included in
written data. The data has to be 29 bytes long.
Before reading this file, control has to be written to select
which profile to read.
Users: http://roccat.sourceforge.net
What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/isku/roccatisku<minor>/keys_thumbster
Date: June 2011
Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
Description: When written, this file lets one set the function of the
thumbster keys for a specific profile. Profile number is included
in written data. The data has to be 23 bytes long.
Before reading this file, control has to be written to select
which profile to read.
Users: http://roccat.sourceforge.net
What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/isku/roccatisku<minor>/last_set
Date: June 2011
Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
Description: When written, this file lets one set the time in secs since
epoch in which the last configuration took place.
The data has to be 20 bytes long.
Users: http://roccat.sourceforge.net
What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/isku/roccatisku<minor>/light
Date: June 2011
Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
Description: When written, this file lets one set the backlight intensity for
a specific profile. Profile number is included in written data.
The data has to be 10 bytes long.
Before reading this file, control has to be written to select
which profile to read.
Users: http://roccat.sourceforge.net
What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/isku/roccatisku<minor>/macro
Date: June 2011
Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
Description: When written, this file lets one store macros with max 500
keystrokes for a specific button for a specific profile.
Button and profile numbers are included in written data.
The data has to be 2083 bytes long.
Before reading this file, control has to be written to select
which profile and key to read.
Users: http://roccat.sourceforge.net
What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/isku/roccatisku<minor>/control
Date: June 2011
Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
Description: When written, this file lets one select which data from which
profile will be read next. The data has to be 3 bytes long.
This file is writeonly.
Users: http://roccat.sourceforge.net
What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<product-id>.<num>/isku/roccatisku<minor>/talk
Date: June 2011
Contact: Stefan Achatz <erazor_de@users.sourceforge.net>
Description: When written, this file lets one trigger easyshift functionality
from the host.
The data has to be 16 bytes long.
This file is writeonly.
Users: http://roccat.sourceforge.net

12
Documentation/ABI/testing/sysfs-driver-hid-wiimote
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@ -8,3 +8,15 @@ Contact: David Herrmann <dh.herrmann@googlemail.com>
Description: Make it possible to set/get current led state. Reading from it
returns 0 if led is off and 1 if it is on. Writing 0 to it
disables the led, writing 1 enables it.
What: /sys/bus/hid/drivers/wiimote/<dev>/extension
Date: August 2011
KernelVersion: 3.2
Contact: David Herrmann <dh.herrmann@googlemail.com>
Description: This file contains the currently connected and initialized
extensions. It can be one of: none, motionp, nunchuck, classic,
motionp+nunchuck, motionp+classic
motionp is the official Nintendo Motion+ extension, nunchuck is
the official Nintendo Nunchuck extension and classic is the
Nintendo Classic Controller extension. The motionp extension can
be combined with the other two.

17
Documentation/ABI/testing/sysfs-driver-wacom
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@ -15,9 +15,9 @@ Contact: linux-input@vger.kernel.org
Description:
Attribute group for control of the status LEDs and the OLEDs.
This attribute group is only available for Intuos 4 M, L,
and XL (with LEDs and OLEDs) and Cintiq 21UX2 (LEDs only).
Therefore its presence implicitly signifies the presence of
said LEDs and OLEDs on the tablet device.
and XL (with LEDs and OLEDs) and Cintiq 21UX2 and Cintiq 24HD
(LEDs only). Therefore its presence implicitly signifies the
presence of said LEDs and OLEDs on the tablet device.
What: /sys/bus/usb/devices/<busnum>-<devnum>:<cfg>.<intf>/wacom_led/status0_luminance
Date: August 2011
@ -41,16 +41,17 @@ Date: August 2011
Contact: linux-input@vger.kernel.org
Description:
Writing to this file sets which one of the four (for Intuos 4)
or of the right four (for Cintiq 21UX2) status LEDs is active (0..3).
The other three LEDs on the same side are always inactive.
or of the right four (for Cintiq 21UX2 and Cintiq 24HD) status
LEDs is active (0..3). The other three LEDs on the same side are
always inactive.
What: /sys/bus/usb/devices/<busnum>-<devnum>:<cfg>.<intf>/wacom_led/status_led1_select
Date: September 2011
Contact: linux-input@vger.kernel.org
Description:
Writing to this file sets which one of the left four (for Cintiq 21UX2)
status LEDs is active (0..3). The other three LEDs on the left are always
inactive.
Writing to this file sets which one of the left four (for Cintiq 21UX2
and Cintiq 24HD) status LEDs is active (0..3). The other three LEDs on
the left are always inactive.
What: /sys/bus/usb/devices/<busnum>-<devnum>:<cfg>.<intf>/wacom_led/buttons_luminance
Date: August 2011

4
Documentation/ABI/testing/sysfs-kernel-slab
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@ -346,6 +346,10 @@ Description:
number of objects per slab. If a slab cannot be allocated
because of fragmentation, SLUB will retry with the minimum order
possible depending on its characteristics.
When debug_guardpage_minorder=N (N > 0) parameter is specified
(see Documentation/kernel-parameters.txt), the minimum possible
order is used and this sysfs entry can not be used to change
the order at run time.
What: /sys/kernel/slab/cache/order_fallback
Date: April 2008

16
Documentation/ABI/testing/sysfs-module
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@ -33,3 +33,19 @@ Description: Maximum time allowed for periodic transfers per microframe (μs)
Beware, non-standard modes are usually not thoroughly tested by
hardware designers, and the hardware can malfunction when this
setting differ from default 100.
What: /sys/module/*/{coresize,initsize}
Date: Jan 2012
KernelVersion:»·3.3
Contact: Kay Sievers <kay.sievers@vrfy.org>
Description: Module size in bytes.
What: /sys/module/*/taint
Date: Jan 2012
KernelVersion:»·3.3
Contact: Kay Sievers <kay.sievers@vrfy.org>
Description: Module taint flags:
P - proprietary module
O - out-of-tree module
F - force-loaded module
C - staging driver module

17
Documentation/DocBook/device-drivers.tmpl
View File

@ -50,7 +50,9 @@
<sect1><title>Delaying, scheduling, and timer routines</title>
!Iinclude/linux/sched.h
!Ekernel/sched.c
!Ekernel/sched/core.c
!Ikernel/sched/cpupri.c
!Ikernel/sched/fair.c
!Iinclude/linux/completion.h
!Ekernel/timer.c
</sect1>
@ -100,9 +102,12 @@ X!Iinclude/linux/kobject.h
!Iinclude/linux/device.h
</sect1>
<sect1><title>Device Drivers Base</title>
!Idrivers/base/init.c
!Edrivers/base/driver.c
!Edrivers/base/core.c
!Edrivers/base/syscore.c
!Edrivers/base/class.c
!Idrivers/base/node.c
!Edrivers/base/firmware_class.c
!Edrivers/base/transport_class.c
<!-- Cannot be included, because
@ -111,13 +116,18 @@ X!Iinclude/linux/kobject.h
exceed allowed 44 characters maximum
X!Edrivers/base/attribute_container.c
-->
!Edrivers/base/sys.c
!Edrivers/base/dd.c
<!--
X!Edrivers/base/interface.c
-->
!Iinclude/linux/platform_device.h
!Edrivers/base/platform.c
!Edrivers/base/bus.c
</sect1>
<sect1><title>Device Drivers DMA Management</title>
!Edrivers/base/dma-buf.c
!Edrivers/base/dma-coherent.c
!Edrivers/base/dma-mapping.c
</sect1>
<sect1><title>Device Drivers Power Management</title>
!Edrivers/base/power/main.c
@ -216,9 +226,8 @@ X!Isound/sound_firmware.c
<chapter id="uart16x50">
<title>16x50 UART Driver</title>
!Iinclude/linux/serial_core.h
!Edrivers/tty/serial/serial_core.c
!Edrivers/tty/serial/8250.c
!Edrivers/tty/serial/8250/8250.c
</chapter>
<chapter id="fbdev">

2
Documentation/DocBook/deviceiobook.tmpl
View File

@ -317,7 +317,7 @@ CPU B: spin_unlock_irqrestore(&amp;dev_lock, flags)
<chapter id="pubfunctions">
<title>Public Functions Provided</title>
!Iarch/x86/include/asm/io.h
!Elib/iomap.c
!Elib/pci_iomap.c
</chapter>
</book>

59
Documentation/DocBook/media/constraints.png.b64 Normal file
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@ -0,0 +1,59 @@
iVBORw0KGgoAAAANSUhEUgAAAlQAAAFYCAYAAACVsmLPAAAAAXNSR0IArs4c6QAAAAZiS0dEAP8A
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31
Documentation/DocBook/media/dvb/dvbproperty.xml
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@ -163,14 +163,16 @@ get/set up to 64 properties. The actual meaning of each property is described on
<section id="DTV-FREQUENCY">
<title><constant>DTV_FREQUENCY</constant></title>
<para>Central frequency of the channel, in HZ.</para>
<para>Central frequency of the channel.</para>
<para>Notes:</para>
<para>1)For ISDB-T, the channels are usually transmitted with an offset of 143kHz.
<para>1)For satellital delivery systems, it is measured in kHz.
For the other ones, it is measured in Hz.</para>
<para>2)For ISDB-T, the channels are usually transmitted with an offset of 143kHz.
E.g. a valid frequncy could be 474143 kHz. The stepping is bound to the bandwidth of
the channel which is 6MHz.</para>
<para>2)As in ISDB-Tsb the channel consists of only one or three segments the
<para>3)As in ISDB-Tsb the channel consists of only one or three segments the
frequency step is 429kHz, 3*429 respectively. As for ISDB-T the
central frequency of the channel is expected.</para>
</section>
@ -334,9 +336,10 @@ typedef enum fe_rolloff {
<title>fe_delivery_system type</title>
<para>Possible values: </para>
<programlisting>
typedef enum fe_delivery_system {
SYS_UNDEFINED,
SYS_DVBC_ANNEX_AC,
SYS_DVBC_ANNEX_A,
SYS_DVBC_ANNEX_B,
SYS_DVBT,
SYS_DSS,
@ -353,6 +356,7 @@ typedef enum fe_delivery_system {
SYS_DAB,
SYS_DVBT2,
SYS_TURBO,
SYS_DVBC_ANNEX_C,
} fe_delivery_system_t;
</programlisting>
</section>
@ -647,6 +651,18 @@ typedef enum fe_hierarchy {
many data types via a single multiplex. The API will soon support this
at which point this section will be expanded.</para>
</section>
<section id="DTV_ENUM_DELSYS">
<title><constant>DTV_ENUM_DELSYS</constant></title>
<para>A Multi standard frontend needs to advertise the delivery systems provided.
Applications need to enumerate the provided delivery systems, before using
any other operation with the frontend. Prior to it's introduction,
FE_GET_INFO was used to determine a frontend type. A frontend which
provides more than a single delivery system, FE_GET_INFO doesn't help much.
Applications which intends to use a multistandard frontend must enumerate
the delivery systems associated with it, rather than trying to use
FE_GET_INFO. In the case of a legacy frontend, the result is just the same
as with FE_GET_INFO, but in a more structured format </para>
</section>
</section>
<section id="frontend-property-terrestrial-systems">
<title>Properties used on terrestrial delivery systems</title>
@ -721,14 +737,10 @@ typedef enum fe_hierarchy {
<listitem><para><link linkend="DTV-TUNE"><constant>DTV_TUNE</constant></link></para></listitem>
<listitem><para><link linkend="DTV-CLEAR"><constant>DTV_CLEAR</constant></link></para></listitem>
<listitem><para><link linkend="DTV-FREQUENCY"><constant>DTV_FREQUENCY</constant></link></para></listitem>
<listitem><para><link linkend="DTV-MODULATION"><constant>DTV_MODULATION</constant></link></para></listitem>
<listitem><para><link linkend="DTV-BANDWIDTH-HZ"><constant>DTV_BANDWIDTH_HZ</constant></link></para></listitem>
<listitem><para><link linkend="DTV-INVERSION"><constant>DTV_INVERSION</constant></link></para></listitem>
<listitem><para><link linkend="DTV-CODE-RATE-HP"><constant>DTV_CODE_RATE_HP</constant></link></para></listitem>
<listitem><para><link linkend="DTV-CODE-RATE-LP"><constant>DTV_CODE_RATE_LP</constant></link></para></listitem>
<listitem><para><link linkend="DTV-GUARD-INTERVAL"><constant>DTV_GUARD_INTERVAL</constant></link></para></listitem>
<listitem><para><link linkend="DTV-TRANSMISSION-MODE"><constant>DTV_TRANSMISSION_MODE</constant></link></para></listitem>
<listitem><para><link linkend="DTV-HIERARCHY"><constant>DTV_HIERARCHY</constant></link></para></listitem>
<listitem><para><link linkend="DTV-ISDBT-LAYER-ENABLED"><constant>DTV_ISDBT_LAYER_ENABLED</constant></link></para></listitem>
<listitem><para><link linkend="DTV-ISDBT-PARTIAL-RECEPTION"><constant>DTV_ISDBT_PARTIAL_RECEPTION</constant></link></para></listitem>
<listitem><para><link linkend="DTV-ISDBT-SOUND-BROADCASTING"><constant>DTV_ISDBT_SOUND_BROADCASTING</constant></link></para></listitem>
@ -767,7 +779,8 @@ typedef enum fe_hierarchy {
<title>Properties used on cable delivery systems</title>
<section id="dvbc-params">
<title>DVB-C delivery system</title>
<para>The DVB-C Annex-A/C is the widely used cable standard. Transmission uses QAM modulation.</para>
<para>The DVB-C Annex-A is the widely used cable standard. Transmission uses QAM modulation.</para>
<para>The DVB-C Annex-C is optimized for 6MHz, and is used in Japan. It supports a subset of the Annex A modulation types, and a roll-off of 0.13, instead of 0.15</para>
<para>The following parameters are valid for DVB-C Annex A/C:</para>
<itemizedlist mark='opencircle'>
<listitem><para><link linkend="DTV-API-VERSION"><constant>DTV_API_VERSION</constant></link></para></listitem>

8
Documentation/DocBook/media/dvb/frontend.xml
View File

@ -45,8 +45,8 @@ transmission. The fontend types are given by fe_type_t type, defined as:</para>
</row>
<row>
<entry id="FE_QAM"><constant>FE_QAM</constant></entry>
<entry>For DVB-C annex A/C standard</entry>
<entry><constant>SYS_DVBC_ANNEX_AC</constant></entry>
<entry>For DVB-C annex A standard</entry>
<entry><constant>SYS_DVBC_ANNEX_A</constant></entry>
</row>
<row>
<entry id="FE_OFDM"><constant>FE_OFDM</constant></entry>
@ -63,6 +63,10 @@ transmission. The fontend types are given by fe_type_t type, defined as:</para>
<para>Newer formats like DVB-S2, ISDB-T, ISDB-S and DVB-T2 are not described at the above, as they're
supported via the new <link linkend="FE_GET_SET_PROPERTY">FE_GET_PROPERTY/FE_GET_SET_PROPERTY</link> ioctl's, using the <link linkend="DTV-DELIVERY-SYSTEM">DTV_DELIVERY_SYSTEM</link> parameter.
</para>
<para>The usage of this field is deprecated, as it doesn't report all supported standards, and
will provide an incomplete information for frontends that support multiple delivery systems.
Please use <link linkend="DTV_ENUM_DELSYS">DTV_ENUM_DELSYS</link> instead.</para>
</section>
<section id="fe-caps-t">

206
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7XYTWpx8fmh/gD9+1LhRZ06SfOQLodQEhEe+BN+VYKdc9mtbqCoCAHqVo5/zroJmy5QKqfclV9+x
tr7snvYH6NmPkXe+9nCn1Q6T0AgAiO2LbekjrD3tLKav8lwtErvuPU/KPbKdc/2qVo5diW0+crtd
D+0PkNtfNW7UvQz0tRz0zKdb7Nnu5+2v5YumxPbMlfECALz2tbY+DGTtCbO1PBxky3a21E86eiy2
PiE4VT+9l/YHKKVIZdHR0s21JyDs/WWjhvmM/CIDAIzouX+3pSpo6fUxfbsSc2nu2c49fdaUUzds
DWy27mOq45dif1K1P0DPslYWbf3VKPXya3uKQ6rt9osMANCDrQ/7qPmhJr3u17uK8b3bnGo/j94F
0Op5BVDSZZqmafObLpdNH55rQcJrBcrWx83HLv/19ak+/Pc+Qn7rdqfc19flbA1+UuwLAGz9rt3R
baFkx/J3H/F+lD59/wPA6T5+96Muv/87pj9VZM6iFGn93mXU8uQGv8gAAAAALShSWQQAcITKokY6
liqLAKA6eyqLfmg2AADoj2kCANhLWAQAAB0SBgGwl7BohV9kAAAAgJEIi1YIgwAAAICRCIsAAMji
Y6VCGwCo01+aAAAAAIA7lUUAACR10QQA0PZ3+TRN0+Y3XXQBAIDydnRbKNmx1EcEgC76UyqLAAAo
1vkEAOq3KyzSEQAAAADokwmuAQAAAHgQFgEAAADwICwCAAAA4EFYBAAAAMCDsAgAAACAB2ERAAAA
AA/CIgAAAAAehEUAAAAAPAiLAAAAAHgQFgEAAADwICwCAAAA4EFYBAAAAMCDsAgAAACAB2ERAAAA
AA/CIgAAAAAehEUAAAAAPAiLAAAAAHgQFgEAAADwICwCAAAA4EFYBAAAAMCDsAgAAACAB2ERAAAA
AA/CIgAAAAAe/g/10lQlA3JSSwAAAABJRU5ErkJggg==

8
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@ -178,11 +178,3 @@ in the frequency range from 87,5 to 108,0 MHz</title>
</biblioentry>
</bibliography>
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@ -1168,6 +1168,8 @@ dheight = format.fmt.pix.height;
</section>
</section>
&sub-selection-api;
<section id="streaming-par">
<title>Streaming Parameters</title>
@ -1195,11 +1197,3 @@ separate parameters for input and output devices.</para>
<para>These ioctls are optional, drivers need not implement
them. If so, they return the &EINVAL;.</para>
</section>
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30
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@ -1082,7 +1082,7 @@ until the time in the timestamp field has arrived. I would like to
follow SGI's lead, and adopt a multimedia timestamping system like
their UST (Unadjusted System Time). See
http://web.archive.org/web/*/http://reality.sgi.com
/cpirazzi_engr/lg/time/intro.html.
/cpirazzi_engr/lg/time/intro.html.
UST uses timestamps that are 64-bit signed integers
(not struct timeval's) and given in nanosecond units. The UST clock
starts at zero when the system is booted and runs continuously and
@ -2376,6 +2376,23 @@ that used it. It was originally scheduled for removal in 2.6.35.
<listitem>
<para>V4L2_CTRL_FLAG_VOLATILE was added to signal volatile controls to userspace.</para>
</listitem>
<listitem>
<para>Add selection API for extended control over cropping and
composing. Does not affect the compatibility of current drivers and
applications. See <link linkend="selection-api"> selection API </link> for
details.</para>
</listitem>
</orderedlist>
</section>
<section>
<title>V4L2 in Linux 3.3</title>
<orderedlist>
<listitem>
<para>Added <constant>V4L2_CID_ALPHA_COMPONENT</constant> control
to the <link linkend="control">User controls class</link>.
</para>
</listitem>
</orderedlist>
</section>
@ -2489,6 +2506,9 @@ ioctls.</para>
<listitem>
<para>&VIDIOC-CREATE-BUFS; and &VIDIOC-PREPARE-BUF; ioctls.</para>
</listitem>
<listitem>
<para>Selection API. <xref linkend="selection-api" /></para>
</listitem>
</itemizedlist>
</section>
@ -2507,11 +2527,3 @@ interfaces and should not be implemented in new drivers.</para>
</itemizedlist>
</section>
</section>
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43
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@ -323,12 +323,6 @@ minimum value disables backlight compensation.</entry>
<entry>Switch on or off the illuminator 1 or 2 of the device
(usually a microscope).</entry>
</row>
<row>
<entry><constant>V4L2_CID_LASTP1</constant></entry>
<entry></entry>
<entry>End of the predefined control IDs (currently
<constant>V4L2_CID_ILLUMINATORS_2</constant> + 1).</entry>
</row>
<row>
<entry><constant>V4L2_CID_MIN_BUFFERS_FOR_CAPTURE</constant></entry>
<entry>integer</entry>
@ -345,6 +339,25 @@ and used as a hint to determine the number of OUTPUT buffers to pass to REQBUFS.
The value is the minimum number of OUTPUT buffers that is necessary for hardware
to work.</entry>
</row>
<row id="v4l2-alpha-component">
<entry><constant>V4L2_CID_ALPHA_COMPONENT</constant></entry>
<entry>integer</entry>
<entry> Sets the alpha color component on the capture device or on
the capture buffer queue of a mem-to-mem device. When a mem-to-mem
device produces frame format that includes an alpha component
(e.g. <link linkend="rgb-formats">packed RGB image formats</link>)
and the alpha value is not defined by the mem-to-mem input data
this control lets you select the alpha component value of all
pixels. It is applicable to any pixel format that contains an alpha
component.
</entry>
</row>
<row>
<entry><constant>V4L2_CID_LASTP1</constant></entry>
<entry></entry>
<entry>End of the predefined control IDs (currently
<constant>V4L2_CID_ALPHA_COMPONENT</constant> + 1).</entry>
</row>
<row>
<entry><constant>V4L2_CID_PRIVATE_BASE</constant></entry>
<entry></entry>
@ -3329,6 +3342,16 @@ interface and may change in the future.</para>
<entry>The short circuit protection of the flash
controller has been triggered.</entry>
</row>
<row>
<entry><constant>V4L2_FLASH_FAULT_OVER_CURRENT</constant></entry>
<entry>Current in the LED power supply has exceeded the limit
specific to the flash controller.</entry>
</row>
<row>
<entry><constant>V4L2_FLASH_FAULT_INDICATOR</constant></entry>
<entry>The flash controller has detected a short or open
circuit condition on the indicator LED.</entry>
</row>
</tbody>
</entrytbl>
</row>
@ -3357,11 +3380,3 @@ interface and may change in the future.</para>
</section>
</section>
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@ -108,11 +108,3 @@ linkend="mmap">memory mapping</link> or <link
linkend="userp">user pointer</link>) I/O. See <xref
linkend="io" /> for details.</para>
</section>
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8
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@ -16,11 +16,3 @@ Applications send data to be converted to the driver through a
I/O.</para>
<para>[to do]</para>
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8
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@ -15,11 +15,3 @@ receive the result data either with &func-read; and &func-write;
functions, or through the streaming I/O mechanism.</para>
<para>[to do]</para>
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8
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@ -41,11 +41,3 @@ intermediate step leading up to that information. See the documentation for the
event you want to subscribe to whether this is applicable for that event or not.</para>
</listitem>
</orderedlist></para>
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8
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@ -154,11 +154,3 @@ data flow. For more information see <xref linkend="crop" />.</para>
however the framebuffer interface of the driver may support the
<constant>FBIOBLANK</constant> ioctl.</para>
</section>
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8
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@ -104,11 +104,3 @@ linkend="mmap">memory mapping</link> or <link
linkend="userp">user pointer</link>) I/O. See <xref
linkend="io" /> for details.</para>
</section>
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8
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@ -369,11 +369,3 @@ reasons. <!-- video4linux-list@redhat.com on 22 Oct 2002 subject
<para>To start or stop the frame buffer overlay applications call
the &VIDIOC-OVERLAY; ioctl.</para>
</section>
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8
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@ -47,11 +47,3 @@ depending on the selected frequency. The &VIDIOC-G-TUNER; or
&VIDIOC-G-MODULATOR; ioctl
reports the supported frequency range.</para>
</section>
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8
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@ -337,11 +337,3 @@ an &EBUSY; if the required hardware resources are temporarily
unavailable, for example the device is already in use by another
process.</para>
</section>
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16
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@ -29,10 +29,10 @@ returned by the &VIDIOC-QUERYCAP; ioctl. Any tuner that supports RDS
will set the <constant>V4L2_TUNER_CAP_RDS</constant> flag in
the <structfield>capability</structfield> field of &v4l2-tuner;. If
the driver only passes RDS blocks without interpreting the data
the <constant>V4L2_TUNER_SUB_RDS_BLOCK_IO</constant> flag has to be
the <constant>V4L2_TUNER_CAP_RDS_BLOCK_IO</constant> flag has to be
set, see <link linkend="reading-rds-data">Reading RDS data</link>.
For future use the
flag <constant>V4L2_TUNER_SUB_RDS_CONTROLS</constant> has also been
flag <constant>V4L2_TUNER_CAP_RDS_CONTROLS</constant> has also been
defined. However, a driver for a radio tuner with this capability does
not yet exist, so if you are planning to write such a driver you
should discuss this on the linux-media mailing list: &v4l-ml;.</para>
@ -52,9 +52,9 @@ field of &v4l2-modulator;.
In order to enable the RDS transmission one must set the <constant>V4L2_TUNER_SUB_RDS</constant>
bit in the <structfield>txsubchans</structfield> field of &v4l2-modulator;.
If the driver only passes RDS blocks without interpreting the data
the <constant>V4L2_TUNER_SUB_RDS_BLOCK_IO</constant> flag has to be set. If the
the <constant>V4L2_TUNER_CAP_RDS_BLOCK_IO</constant> flag has to be set. If the
tuner is capable of handling RDS entities like program identification codes and radio
text, the flag <constant>V4L2_TUNER_SUB_RDS_CONTROLS</constant> should be set,
text, the flag <constant>V4L2_TUNER_CAP_RDS_CONTROLS</constant> should be set,
see <link linkend="writing-rds-data">Writing RDS data</link> and
<link linkend="fm-tx-controls">FM Transmitter Control Reference</link>.</para>
</section>
@ -194,11 +194,3 @@ as follows:</para>
</tgroup>
</table>
</section>
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@ -697,12 +697,3 @@ Sliced VBI services</link> for a description of the line payload.</entry>
</section>
</section>
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@ -27,11 +27,3 @@ kernel 2.6.37.</para>
<para>Modern devices all use the <link linkend="raw-vbi">raw</link> or
<link linkend="sliced">sliced</link> VBI API.</para>
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8
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@ -198,11 +198,3 @@ devices with the videodev module.</para>
<para>to do</para>
</section>
-->
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8
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@ -60,11 +60,3 @@ descriptor.</para>
</variablelist>
</refsect1>
</refentry>
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8
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@ -69,11 +69,3 @@ their respective function and parameters are specified in <xref
the parameter remains unmodified.</para>
</refsect1>
</refentry>
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@ -181,11 +181,3 @@ complete the request.</para>
</variablelist>
</refsect1>
</refentry>
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@ -74,11 +74,3 @@ mapped yet.</para>
</variablelist>
</refsect1>
</refentry>
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@ -111,11 +111,3 @@ system has been reached.</para>
</variablelist>
</refsect1>
</refentry>
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@ -117,11 +117,3 @@ than <constant>OPEN_MAX</constant>.</para>
</variablelist>
</refsect1>
</refentry>
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@ -179,11 +179,3 @@ type of device.</para>
</variablelist>
</refsect1>
</refentry>
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@ -128,11 +128,3 @@ zero or greater than <constant>FD_SETSIZE</constant>.</para>
</variablelist>
</refsect1>
</refentry>
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@ -126,11 +126,3 @@ type of device.</para>
</variablelist>
</refsect1>
</refentry>
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@ -1282,11 +1282,3 @@ line, top field first. The bottom field is transmitted first.</entry>
</mediaobject>
</figure>
</section>
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@ -158,10 +158,3 @@ still don't use libv4l.</para>
</section>
</section>
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@ -60,11 +60,3 @@ pixel image</title>
</example>
</refsect1>
</refentry>
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@ -137,11 +137,3 @@ pixel image</title>
</example>
</refsect1>
</refentry>
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@ -141,11 +141,3 @@ pixel image</title>
</example>
</refsect1>
</refentry>
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@ -144,11 +144,3 @@ CbCr plane has as many pad bytes after its rows.</para>
</example>
</refsect1>
</refentry>
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@ -64,11 +64,3 @@ layout of macroblocks</title>
</example>
</refsect1>
</refentry>
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@ -164,11 +164,3 @@ pixel image</title>
</example>
</refsect1>
</refentry>
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@ -0,0 +1,121 @@
<refentry>
<refmeta>
<refentrytitle>V4L2_PIX_FMT_NV24 ('NV24'), V4L2_PIX_FMT_NV42 ('NV42')</refentrytitle>
&manvol;
</refmeta>
<refnamediv>
<refname id="V4L2-PIX-FMT-NV24"><constant>V4L2_PIX_FMT_NV24</constant></refname>
<refname id="V4L2-PIX-FMT-NV42"><constant>V4L2_PIX_FMT_NV42</constant></refname>
<refpurpose>Formats with full horizontal and vertical
chroma resolutions, also known as YUV 4:4:4. One luminance and one
chrominance plane with alternating chroma samples as opposed to
<constant>V4L2_PIX_FMT_YVU420</constant></refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>These are two-plane versions of the YUV 4:4:4 format. The three
components are separated into two sub-images or planes. The Y plane is
first, with each Y sample stored in one byte per pixel. For
<constant>V4L2_PIX_FMT_NV24</constant>, a combined CbCr plane
immediately follows the Y plane in memory. The CbCr plane has the same
width and height, in pixels, as the Y plane (and the image). Each line
contains one CbCr pair per pixel, with each Cb and Cr sample stored in
one byte. <constant>V4L2_PIX_FMT_NV42</constant> is the same except that
the Cb and Cr samples are swapped, the CrCb plane starts with a Cr
sample.</para>
<para>If the Y plane has pad bytes after each row, then the CbCr plane
has twice as many pad bytes after its rows.</para>
<example>
<title><constant>V4L2_PIX_FMT_NV24</constant> 4 &times; 4
pixel image</title>
<formalpara>
<title>Byte Order.</title>
<para>Each cell is one byte.
<informaltable frame="none">
<tgroup cols="9" align="center">
<colspec align="left" colwidth="2*" />
<tbody valign="top">
<row>
<entry>start&nbsp;+&nbsp;0:</entry>
<entry>Y'<subscript>00</subscript></entry>
<entry>Y'<subscript>01</subscript></entry>
<entry>Y'<subscript>02</subscript></entry>
<entry>Y'<subscript>03</subscript></entry>
</row>
<row>
<entry>start&nbsp;+&nbsp;4:</entry>
<entry>Y'<subscript>10</subscript></entry>
<entry>Y'<subscript>11</subscript></entry>
<entry>Y'<subscript>12</subscript></entry>
<entry>Y'<subscript>13</subscript></entry>
</row>
<row>
<entry>start&nbsp;+&nbsp;8:</entry>
<entry>Y'<subscript>20</subscript></entry>
<entry>Y'<subscript>21</subscript></entry>
<entry>Y'<subscript>22</subscript></entry>
<entry>Y'<subscript>23</subscript></entry>
</row>
<row>
<entry>start&nbsp;+&nbsp;12:</entry>
<entry>Y'<subscript>30</subscript></entry>
<entry>Y'<subscript>31</subscript></entry>
<entry>Y'<subscript>32</subscript></entry>
<entry>Y'<subscript>33</subscript></entry>
</row>
<row>
<entry>start&nbsp;+&nbsp;16:</entry>
<entry>Cb<subscript>00</subscript></entry>
<entry>Cr<subscript>00</subscript></entry>
<entry>Cb<subscript>01</subscript></entry>
<entry>Cr<subscript>01</subscript></entry>
<entry>Cb<subscript>02</subscript></entry>
<entry>Cr<subscript>02</subscript></entry>
<entry>Cb<subscript>03</subscript></entry>
<entry>Cr<subscript>03</subscript></entry>
</row>
<row>
<entry>start&nbsp;+&nbsp;24:</entry>
<entry>Cb<subscript>10</subscript></entry>
<entry>Cr<subscript>10</subscript></entry>
<entry>Cb<subscript>11</subscript></entry>
<entry>Cr<subscript>11</subscript></entry>
<entry>Cb<subscript>12</subscript></entry>
<entry>Cr<subscript>12</subscript></entry>
<entry>Cb<subscript>13</subscript></entry>
<entry>Cr<subscript>13</subscript></entry>
</row>
<row>
<entry>start&nbsp;+&nbsp;32:</entry>
<entry>Cb<subscript>20</subscript></entry>
<entry>Cr<subscript>20</subscript></entry>
<entry>Cb<subscript>21</subscript></entry>
<entry>Cr<subscript>21</subscript></entry>
<entry>Cb<subscript>22</subscript></entry>
<entry>Cr<subscript>22</subscript></entry>
<entry>Cb<subscript>23</subscript></entry>
<entry>Cr<subscript>23</subscript></entry>
</row>
<row>
<entry>start&nbsp;+&nbsp;40:</entry>
<entry>Cb<subscript>30</subscript></entry>
<entry>Cr<subscript>30</subscript></entry>
<entry>Cb<subscript>31</subscript></entry>
<entry>Cr<subscript>31</subscript></entry>
<entry>Cb<subscript>32</subscript></entry>
<entry>Cr<subscript>32</subscript></entry>
<entry>Cb<subscript>33</subscript></entry>
<entry>Cr<subscript>33</subscript></entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</formalpara>
</example>
</refsect1>
</refentry>

15
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@ -428,8 +428,11 @@ colorspace <constant>V4L2_COLORSPACE_SRGB</constant>.</para>
<para>Bit 7 is the most significant bit. The value of a = alpha
bits is undefined when reading from the driver, ignored when writing
to the driver, except when alpha blending has been negotiated for a
<link linkend="overlay">Video Overlay</link> or <link
linkend="osd">Video Output Overlay</link>.</para>
<link linkend="overlay">Video Overlay</link> or <link linkend="osd">
Video Output Overlay</link> or when alpha component has been configured
for a <link linkend="capture">Video Capture</link> by means of <link
linkend="v4l2-alpha-component"> <constant>V4L2_CID_ALPHA_COMPONENT
</constant> </link> control.</para>
<example>
<title><constant>V4L2_PIX_FMT_BGR24</constant> 4 &times; 4 pixel
@ -930,11 +933,3 @@ See &v4l-dvb; for access instructions.</para>
</refsect1>
</refentry>
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@ -234,11 +234,3 @@ linkend="osd">Video Output Overlay</link>.</para>
</refsect1>
</refentry>
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@ -81,11 +81,3 @@ pixel image</title>
</example>
</refsect1>
</refentry>
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@ -65,11 +65,3 @@ pixel image</title>
</example>
</refsect1>
</refentry>
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@ -65,11 +65,3 @@ pixel image</title>
</example>
</refsect1>
</refentry>
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@ -65,11 +65,3 @@ columns and rows.</para>
</example>
</refsect1>
</refentry>
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@ -118,11 +118,3 @@ pixel image</title>
</example>
</refsect1>
</refentry>
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indent-tabs-mode: nil
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@ -118,11 +118,3 @@ pixel image</title>
</example>
</refsect1>
</refentry>
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@ -79,11 +79,3 @@ pixel image</title>
</example>
</refsect1>
</refentry>
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@ -147,11 +147,3 @@ pixel image</title>
</example>
</refsect1>
</refentry>
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@ -131,11 +131,3 @@ pixel image</title>
</example>
</refsect1>
</refentry>
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@ -145,11 +145,3 @@ pixel image</title>
</example>
</refsect1>
</refentry>
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@ -147,11 +147,3 @@ pixel image</title>
</example>
</refsect1>
</refentry>
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@ -152,11 +152,3 @@ pixel image</title>
</example>
</refsect1>
</refentry>
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@ -151,11 +151,3 @@ pixel image</title>
</example>
</refsect1>
</refentry>
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@ -118,11 +118,3 @@ pixel image</title>
</example>
</refsect1>
</refentry>
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@ -118,11 +118,3 @@ pixel image</title>
</example>
</refsect1>
</refentry>
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@ -714,6 +714,7 @@ information.</para>
&sub-nv12m;
&sub-nv12mt;
&sub-nv16;
&sub-nv24;
&sub-m420;
</section>
@ -890,6 +891,11 @@ kernel sources in the file <filename>Documentation/video4linux/cx2341x/README.hm
<entry>'M310'</entry>
<entry>Compressed BGGR Bayer format used by the gspca driver.</entry>
</row>
<row id="V4L2-PIX-FMT-JL2005BCD">
<entry><constant>V4L2_PIX_FMT_JL2005BCD</constant></entry>
<entry>'JL20'</entry>
<entry>JPEG compressed RGGB Bayer format used by the gspca driver.</entry>
</row>
<row id="V4L2-PIX-FMT-OV511">
<entry><constant>V4L2_PIX_FMT_OV511</constant></entry>
<entry>'O511'</entry>
@ -997,11 +1003,3 @@ the other bits are set to 0.</entry>
</tgroup>
</table>
</section>
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@ -0,0 +1,321 @@
<section id="selection-api">
<title>Experimental API for cropping, composing and scaling</title>
<note>
<title>Experimental</title>
<para>This is an <link linkend="experimental">experimental</link>
interface and may change in the future.</para>
</note>
<section>
<title>Introduction</title>
<para>Some video capture devices can sample a subsection of a picture and
shrink or enlarge it to an image of arbitrary size. Next, the devices can
insert the image into larger one. Some video output devices can crop part of an
input image, scale it up or down and insert it at an arbitrary scan line and
horizontal offset into a video signal. We call these abilities cropping,
scaling and composing.</para>
<para>On a video <emphasis>capture</emphasis> device the source is a video
signal, and the cropping target determine the area actually sampled. The sink
is an image stored in a memory buffer. The composing area specifies which part
of the buffer is actually written to by the hardware. </para>
<para>On a video <emphasis>output</emphasis> device the source is an image in a
memory buffer, and the cropping target is a part of an image to be shown on a
display. The sink is the display or the graphics screen. The application may
select the part of display where the image should be displayed. The size and
position of such a window is controlled by the compose target.</para>
<para>Rectangles for all cropping and composing targets are defined even if the
device does supports neither cropping nor composing. Their size and position
will be fixed in such a case. If the device does not support scaling then the
cropping and composing rectangles have the same size.</para>
</section>
<section>
<title>Selection targets</title>
<figure id="sel-targets-capture">
<title>Cropping and composing targets</title>
<mediaobject>
<imageobject>
<imagedata fileref="selection.png" format="PNG" />
</imageobject>
<textobject>
<phrase>Targets used by a cropping, composing and scaling
process</phrase>
</textobject>
</mediaobject>
</figure>
</section>
<section>
<title>Configuration</title>
<para>Applications can use the <link linkend="vidioc-g-selection">selection
API</link> to select an area in a video signal or a buffer, and to query for
default settings and hardware limits.</para>
<para>Video hardware can have various cropping, composing and scaling
limitations. It may only scale up or down, support only discrete scaling
factors, or have different scaling abilities in the horizontal and vertical
directions. Also it may not support scaling at all. At the same time the
cropping/composing rectangles may have to be aligned, and both the source and
the sink may have arbitrary upper and lower size limits. Therefore, as usual,
drivers are expected to adjust the requested parameters and return the actual
values selected. An application can control the rounding behaviour using <link
linkend="v4l2-sel-flags"> constraint flags </link>.</para>
<section>
<title>Configuration of video capture</title>
<para>See figure <xref linkend="sel-targets-capture" /> for examples of the
selection targets available for a video capture device. It is recommended to
configure the cropping targets before to the composing targets.</para>
<para>The range of coordinates of the top left corner, width and height of
areas that can be sampled is given by the <constant> V4L2_SEL_TGT_CROP_BOUNDS
</constant> target. It is recommended for the driver developers to put the
top/left corner at position <constant> (0,0) </constant>. The rectangle's
coordinates are expressed in pixels.</para>
<para>The top left corner, width and height of the source rectangle, that is
the area actually sampled, is given by the <constant> V4L2_SEL_TGT_CROP_ACTIVE
</constant> target. It uses the same coordinate system as <constant>
V4L2_SEL_TGT_CROP_BOUNDS </constant>. The active cropping area must lie
completely inside the capture boundaries. The driver may further adjust the
requested size and/or position according to hardware limitations.</para>
<para>Each capture device has a default source rectangle, given by the
<constant> V4L2_SEL_TGT_CROP_DEFAULT </constant> target. This rectangle shall
over what the driver writer considers the complete picture. Drivers shall set
the active crop rectangle to the default when the driver is first loaded, but
not later.</para>
<para>The composing targets refer to a memory buffer. The limits of composing
coordinates are obtained using <constant> V4L2_SEL_TGT_COMPOSE_BOUNDS
</constant>. All coordinates are expressed in pixels. The rectangle's top/left
corner must be located at position <constant> (0,0) </constant>. The width and
height are equal to the image size set by <constant> VIDIOC_S_FMT </constant>.
</para>
<para>The part of a buffer into which the image is inserted by the hardware is
controlled by the <constant> V4L2_SEL_TGT_COMPOSE_ACTIVE </constant> target.
The rectangle's coordinates are also expressed in the same coordinate system as
the bounds rectangle. The composing rectangle must lie completely inside bounds
rectangle. The driver must adjust the composing rectangle to fit to the
bounding limits. Moreover, the driver can perform other adjustments according
to hardware limitations. The application can control rounding behaviour using
<link linkend="v4l2-sel-flags"> constraint flags </link>.</para>
<para>For capture devices the default composing rectangle is queried using
<constant> V4L2_SEL_TGT_COMPOSE_DEFAULT </constant>. It is usually equal to the
bounding rectangle.</para>
<para>The part of a buffer that is modified by the hardware is given by
<constant> V4L2_SEL_TGT_COMPOSE_PADDED </constant>. It contains all pixels
defined using <constant> V4L2_SEL_TGT_COMPOSE_ACTIVE </constant> plus all
padding data modified by hardware during insertion process. All pixels outside
this rectangle <emphasis>must not</emphasis> be changed by the hardware. The
content of pixels that lie inside the padded area but outside active area is
undefined. The application can use the padded and active rectangles to detect
where the rubbish pixels are located and remove them if needed.</para>
</section>
<section>
<title>Configuration of video output</title>
<para>For output devices targets and ioctls are used similarly to the video
capture case. The <emphasis> composing </emphasis> rectangle refers to the
insertion of an image into a video signal. The cropping rectangles refer to a
memory buffer. It is recommended to configure the composing targets before to
the cropping targets.</para>
<para>The cropping targets refer to the memory buffer that contains an image to
be inserted into a video signal or graphical screen. The limits of cropping
coordinates are obtained using <constant> V4L2_SEL_TGT_CROP_BOUNDS </constant>.
All coordinates are expressed in pixels. The top/left corner is always point
<constant> (0,0) </constant>. The width and height is equal to the image size
specified using <constant> VIDIOC_S_FMT </constant> ioctl.</para>
<para>The top left corner, width and height of the source rectangle, that is
the area from which image date are processed by the hardware, is given by the
<constant> V4L2_SEL_TGT_CROP_ACTIVE </constant>. Its coordinates are expressed
in in the same coordinate system as the bounds rectangle. The active cropping
area must lie completely inside the crop boundaries and the driver may further
adjust the requested size and/or position according to hardware
limitations.</para>
<para>For output devices the default cropping rectangle is queried using
<constant> V4L2_SEL_TGT_CROP_DEFAULT </constant>. It is usually equal to the
bounding rectangle.</para>
<para>The part of a video signal or graphics display where the image is
inserted by the hardware is controlled by <constant>
V4L2_SEL_TGT_COMPOSE_ACTIVE </constant> target. The rectangle's coordinates
are expressed in pixels. The composing rectangle must lie completely inside the
bounds rectangle. The driver must adjust the area to fit to the bounding
limits. Moreover, the driver can perform other adjustments according to
hardware limitations. </para>
<para>The device has a default composing rectangle, given by the <constant>
V4L2_SEL_TGT_COMPOSE_DEFAULT </constant> target. This rectangle shall cover what
the driver writer considers the complete picture. It is recommended for the
driver developers to put the top/left corner at position <constant> (0,0)
</constant>. Drivers shall set the active composing rectangle to the default
one when the driver is first loaded.</para>
<para>The devices may introduce additional content to video signal other than
an image from memory buffers. It includes borders around an image. However,
such a padded area is driver-dependent feature not covered by this document.
Driver developers are encouraged to keep padded rectangle equal to active one.
The padded target is accessed by the <constant> V4L2_SEL_TGT_COMPOSE_PADDED
</constant> identifier. It must contain all pixels from the <constant>
V4L2_SEL_TGT_COMPOSE_ACTIVE </constant> target.</para>
</section>
<section>
<title>Scaling control.</title>
<para>An application can detect if scaling is performed by comparing the width
and the height of rectangles obtained using <constant> V4L2_SEL_TGT_CROP_ACTIVE
</constant> and <constant> V4L2_SEL_TGT_COMPOSE_ACTIVE </constant> targets. If
these are not equal then the scaling is applied. The application can compute
the scaling ratios using these values.</para>
</section>
</section>
<section>
<title>Comparison with old cropping API.</title>
<para>The selection API was introduced to cope with deficiencies of previous
<link linkend="crop"> API </link>, that was designed to control simple capture
devices. Later the cropping API was adopted by video output drivers. The ioctls
are used to select a part of the display were the video signal is inserted. It
should be considered as an API abuse because the described operation is
actually the composing. The selection API makes a clear distinction between
composing and cropping operations by setting the appropriate targets. The V4L2
API lacks any support for composing to and cropping from an image inside a
memory buffer. The application could configure a capture device to fill only a
part of an image by abusing V4L2 API. Cropping a smaller image from a larger
one is achieved by setting the field <structfield>
&v4l2-pix-format;::bytesperline </structfield>. Introducing an image offsets
could be done by modifying field <structfield> &v4l2-buffer;::m:userptr
</structfield> before calling <constant> VIDIOC_QBUF </constant>. Those
operations should be avoided because they are not portable (endianness), and do
not work for macroblock and Bayer formats and mmap buffers. The selection API
deals with configuration of buffer cropping/composing in a clear, intuitive and
portable way. Next, with the selection API the concepts of the padded target
and constraints flags are introduced. Finally, <structname> &v4l2-crop;
</structname> and <structname> &v4l2-cropcap; </structname> have no reserved
fields. Therefore there is no way to extend their functionality. The new
<structname> &v4l2-selection; </structname> provides a lot of place for future
extensions. Driver developers are encouraged to implement only selection API.
The former cropping API would be simulated using the new one. </para>
</section>
<section>
<title>Examples</title>
<example>
<title>Resetting the cropping parameters</title>
<para>(A video capture device is assumed; change <constant>
V4L2_BUF_TYPE_VIDEO_CAPTURE </constant> for other devices; change target to
<constant> V4L2_SEL_TGT_COMPOSE_* </constant> family to configure composing
area)</para>
<programlisting>
&v4l2-selection; sel = {
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
.target = V4L2_SEL_TGT_CROP_DEFAULT,
};
ret = ioctl(fd, &VIDIOC-G-SELECTION;, &amp;sel);
if (ret)
exit(-1);
sel.target = V4L2_SEL_TGT_CROP_ACTIVE;
ret = ioctl(fd, &VIDIOC-S-SELECTION;, &amp;sel);
if (ret)
exit(-1);
</programlisting>
</example>
<example>
<title>Simple downscaling</title>
<para>Setting a composing area on output of size of <emphasis> at most
</emphasis> half of limit placed at a center of a display.</para>
<programlisting>
&v4l2-selection; sel = {
.type = V4L2_BUF_TYPE_VIDEO_OUTPUT,
.target = V4L2_SEL_TGT_COMPOSE_BOUNDS,
};
struct v4l2_rect r;
ret = ioctl(fd, &VIDIOC-G-SELECTION;, &amp;sel);
if (ret)
exit(-1);
/* setting smaller compose rectangle */
r.width = sel.r.width / 2;
r.height = sel.r.height / 2;
r.left = sel.r.width / 4;
r.top = sel.r.height / 4;
sel.r = r;
sel.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
sel.flags = V4L2_SEL_FLAG_LE;
ret = ioctl(fd, &VIDIOC-S-SELECTION;, &amp;sel);
if (ret)
exit(-1);
</programlisting>
</example>
<example>
<title>Querying for scaling factors</title>
<para>A video output device is assumed; change <constant>
V4L2_BUF_TYPE_VIDEO_OUTPUT </constant> for other devices</para>
<programlisting>
&v4l2-selection; compose = {
.type = V4L2_BUF_TYPE_VIDEO_OUTPUT,
.target = V4L2_SEL_TGT_COMPOSE_ACTIVE,
};
&v4l2-selection; crop = {
.type = V4L2_BUF_TYPE_VIDEO_OUTPUT,
.target = V4L2_SEL_TGT_CROP_ACTIVE,
};
double hscale, vscale;
ret = ioctl(fd, &VIDIOC-G-SELECTION;, &amp;compose);
if (ret)
exit(-1);
ret = ioctl(fd, &VIDIOC-G-SELECTION;, &amp;crop);
if (ret)
exit(-1);
/* computing scaling factors */
hscale = (double)compose.r.width / crop.r.width;
vscale = (double)compose.r.height / crop.r.height;
</programlisting>
</example>
</section>
</section>

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@ -501,6 +501,7 @@ and discussions on the V4L mailing list.</revremark>
&sub-g-output;
&sub-g-parm;
&sub-g-priority;
&sub-g-selection;
&sub-g-sliced-vbi-cap;
&sub-g-std;
&sub-g-tuner;

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@ -228,11 +228,3 @@ is out of bounds.</para>
</variablelist>
</refsect1>
</refentry>
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@ -156,11 +156,3 @@ bounds.</para>
</variablelist>
</refsect1>
</refentry>
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@ -311,11 +311,3 @@ out of bounds.</para>
</variablelist>
</refsect1>
</refentry>
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@ -196,11 +196,3 @@ is out of bounds.</para>
</variablelist>
</refsect1>
</refentry>
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@ -381,11 +381,3 @@ is out of bounds.</para>
</variablelist>
</refsect1>
</refentry>
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@ -127,11 +127,3 @@ this control belongs to.</para>
</variablelist>
</refsect1>
</refentry>
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@ -183,7 +183,12 @@ applications must set the array to zero.</entry>
<entry>__u32</entry>
<entry><structfield>ctrl_class</structfield></entry>
<entry>The control class to which all controls belong, see
<xref linkend="ctrl-class" />.</entry>
<xref linkend="ctrl-class" />. Drivers that use a kernel framework for handling
controls will also accept a value of 0 here, meaning that the controls can
belong to any control class. Whether drivers support this can be tested by setting
<structfield>ctrl_class</structfield> to 0 and calling <constant>VIDIOC_TRY_EXT_CTRLS</constant>
with a <structfield>count</structfield> of 0. If that succeeds, then the driver
supports this feature.</entry>
</row>
<row>
<entry>__u32</entry>
@ -194,10 +199,13 @@ also be zero.</entry>
<row>
<entry>__u32</entry>
<entry><structfield>error_idx</structfield></entry>
<entry>Set by the driver in case of an error. It is the
index of the control causing the error or equal to 'count' when the
error is not associated with a particular control. Undefined when the
ioctl returns 0 (success).</entry>
<entry>Set by the driver in case of an error. If it is equal
to <structfield>count</structfield>, then no actual changes were made to
controls. In other words, the error was not associated with setting a particular
control. If it is another value, then only the controls up to <structfield>error_idx-1</structfield>
were modified and control <structfield>error_idx</structfield> is the one that
caused the error. The <structfield>error_idx</structfield> value is undefined
if the ioctl returned 0 (success).</entry>
</row>
<row>
<entry>__u32</entry>
@ -312,10 +320,3 @@ to store the payload and this error code is returned.</para>
</refsect1>
</refentry>
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35
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@ -295,7 +295,8 @@ set this field to zero.</entry>
<entry>The device is capable of non-destructive overlays.
When the driver clears this flag, only destructive overlays are
supported. There are no drivers yet which support both destructive and
non-destructive overlays.</entry>
non-destructive overlays. Video Output Overlays are in practice always
non-destructive.</entry>
</row>
<row>
<entry><constant>V4L2_FBUF_CAP_CHROMAKEY</constant></entry>
@ -339,8 +340,8 @@ blending makes no sense for destructive overlays.</entry>
<row>
<entry><constant>V4L2_FBUF_CAP_SRC_CHROMAKEY</constant></entry>
<entry>0x0080</entry>
<entry>The device supports Source Chroma-keying. Framebuffer pixels
with the chroma-key colors are replaced by video pixels, which is exactly opposite of
<entry>The device supports Source Chroma-keying. Video pixels
with the chroma-key colors are replaced by framebuffer pixels, which is exactly opposite of
<constant>V4L2_FBUF_CAP_CHROMAKEY</constant></entry>
</row>
</tbody>
@ -356,21 +357,27 @@ with the chroma-key colors are replaced by video pixels, which is exactly opposi
<entry><constant>V4L2_FBUF_FLAG_PRIMARY</constant></entry>
<entry>0x0001</entry>
<entry>The framebuffer is the primary graphics surface.
In other words, the overlay is destructive. [?]</entry>
In other words, the overlay is destructive. This flag is typically set by any
driver that doesn't have the <constant>V4L2_FBUF_CAP_EXTERNOVERLAY</constant>
capability and it is cleared otherwise.</entry>
</row>
<row>
<entry><constant>V4L2_FBUF_FLAG_OVERLAY</constant></entry>
<entry>0x0002</entry>
<entry>The frame buffer is an overlay surface the same
size as the capture. [?]</entry>
</row>
<row>
<entry spanname="hspan">The purpose of
<constant>V4L2_FBUF_FLAG_PRIMARY</constant> and
<constant>V4L2_FBUF_FLAG_OVERLAY</constant> was never quite clear.
Most drivers seem to ignore these flags. For compatibility with the
<wordasword>bttv</wordasword> driver applications should set the
<constant>V4L2_FBUF_FLAG_OVERLAY</constant> flag.</entry>
<entry>If this flag is set for a video capture device, then the
driver will set the initial overlay size to cover the full framebuffer size,
otherwise the existing overlay size (as set by &VIDIOC-S-FMT;) will be used.
Only one video capture driver (bttv) supports this flag. The use of this flag
for capture devices is deprecated. There is no way to detect which drivers
support this flag, so the only reliable method of setting the overlay size is
through &VIDIOC-S-FMT;.
If this flag is set for a video output device, then the video output overlay
window is relative to the top-left corner of the framebuffer and restricted
to the size of the framebuffer. If it is cleared, then the video output
overlay window is relative to the video output display.
</entry>
</row>
<row>
<entry><constant>V4L2_FBUF_FLAG_CHROMAKEY</constant></entry>

15
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@ -98,8 +98,11 @@ the &v4l2-output; <structfield>modulator</structfield> field and the
<entry>&v4l2-tuner-type;</entry>
<entry><structfield>type</structfield></entry>
<entry>The tuner type. This is the same value as in the
&v4l2-tuner; <structfield>type</structfield> field. The field is not
applicable to modulators, &ie; ignored by drivers.</entry>
&v4l2-tuner; <structfield>type</structfield> field. The type must be set
to <constant>V4L2_TUNER_RADIO</constant> for <filename>/dev/radioX</filename>
device nodes, and to <constant>V4L2_TUNER_ANALOG_TV</constant>
for all others. The field is not applicable to modulators, &ie; ignored
by drivers.</entry>
</row>
<row>
<entry>__u32</entry>
@ -135,11 +138,3 @@ wrong.</para>
</variablelist>
</refsect1>
</refentry>
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4
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@ -61,8 +61,8 @@ desired input in an integer and call the
<constant>VIDIOC_S_INPUT</constant> ioctl with a pointer to this
integer. Side effects are possible. For example inputs may support
different video standards, so the driver may implicitly switch the
current standard. It is good practice to select an input before
querying or negotiating any other parameters.</para>
current standard. Because of these possible side effects applications
must select an input before querying or negotiating any other parameters.</para>
<para>Information about video inputs is available using the
&VIDIOC-ENUMINPUT; ioctl.</para>

8
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@ -236,11 +236,3 @@ mode.</entry>
</variablelist>
</refsect1>
</refentry>
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5
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@ -61,8 +61,9 @@ desired output in an integer and call the
<constant>VIDIOC_S_OUTPUT</constant> ioctl with a pointer to this integer.
Side effects are possible. For example outputs may support different
video standards, so the driver may implicitly switch the current
standard. It is good practice to select an output before querying or
negotiating any other parameters.</para>
standard.
standard. Because of these possible side effects applications
must select an output before querying or negotiating any other parameters.</para>
<para>Information about video outputs is available using the
&VIDIOC-ENUMOUTPUT; ioctl.</para>

8
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@ -133,11 +133,3 @@ priority.</para>
</variablelist>
</refsect1>
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304
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@ -0,0 +1,304 @@
<refentry id="vidioc-g-selection">
<refmeta>
<refentrytitle>ioctl VIDIOC_G_SELECTION, VIDIOC_S_SELECTION</refentrytitle>
&manvol;
</refmeta>
<refnamediv>
<refname>VIDIOC_G_SELECTION</refname>
<refname>VIDIOC_S_SELECTION</refname>
<refpurpose>Get or set one of the selection rectangles</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcprototype>
<funcdef>int <function>ioctl</function></funcdef>
<paramdef>int <parameter>fd</parameter></paramdef>
<paramdef>int <parameter>request</parameter></paramdef>
<paramdef>struct v4l2_selection *<parameter>argp</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Arguments</title>
<variablelist>
<varlistentry>
<term><parameter>fd</parameter></term>
<listitem>
<para>&fd;</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>request</parameter></term>
<listitem>
<para>VIDIOC_G_SELECTION, VIDIOC_S_SELECTION</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>argp</parameter></term>
<listitem>
<para></para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Description</title>
<note>
<title>Experimental</title>
<para>This is an <link linkend="experimental"> experimental </link>
interface and may change in the future.</para>
</note>
<para>The ioctls are used to query and configure selection rectangles.</para>
<para> To query the cropping (composing) rectangle set <structfield>
&v4l2-selection;::type </structfield> to the respective buffer type. Do not
use multiplanar buffers. Use <constant> V4L2_BUF_TYPE_VIDEO_CAPTURE
</constant> instead of <constant> V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE
</constant>. Use <constant> V4L2_BUF_TYPE_VIDEO_OUTPUT </constant> instead of
<constant> V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE </constant>. The next step is
setting <structfield> &v4l2-selection;::target </structfield> to value
<constant> V4L2_SEL_TGT_CROP_ACTIVE </constant> (<constant>
V4L2_SEL_TGT_COMPOSE_ACTIVE </constant>). Please refer to table <xref
linkend="v4l2-sel-target" /> or <xref linkend="selection-api" /> for additional
targets. Fields <structfield> &v4l2-selection;::flags </structfield> and
<structfield> &v4l2-selection;::reserved </structfield> are ignored and they
must be filled with zeros. The driver fills the rest of the structure or
returns &EINVAL; if incorrect buffer type or target was used. If cropping
(composing) is not supported then the active rectangle is not mutable and it is
always equal to the bounds rectangle. Finally, structure <structfield>
&v4l2-selection;::r </structfield> is filled with the current cropping
(composing) coordinates. The coordinates are expressed in driver-dependent
units. The only exception are rectangles for images in raw formats, whose
coordinates are always expressed in pixels. </para>
<para> To change the cropping (composing) rectangle set <structfield>
&v4l2-selection;::type </structfield> to the respective buffer type. Do not
use multiplanar buffers. Use <constant> V4L2_BUF_TYPE_VIDEO_CAPTURE
</constant> instead of <constant> V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE
</constant>. Use <constant> V4L2_BUF_TYPE_VIDEO_OUTPUT </constant> instead of
<constant> V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE </constant>. The next step is
setting <structfield> &v4l2-selection;::target </structfield> to value
<constant> V4L2_SEL_TGT_CROP_ACTIVE </constant> (<constant>
V4L2_SEL_TGT_COMPOSE_ACTIVE </constant>). Please refer to table <xref
linkend="v4l2-sel-target" /> or <xref linkend="selection-api" /> for additional
targets. Set desired active area into the field <structfield>
&v4l2-selection;::r </structfield>. Field <structfield>
&v4l2-selection;::reserved </structfield> is ignored and must be filled with
zeros. The driver may adjust the rectangle coordinates. An application may
introduce constraints to control rounding behaviour. Set the field
<structfield> &v4l2-selection;::flags </structfield> to one of values:
<itemizedlist>
<listitem>
<para><constant>0</constant> - The driver can adjust the rectangle size freely
and shall choose a crop/compose rectangle as close as possible to the requested
one.</para>
</listitem>
<listitem>
<para><constant>V4L2_SEL_FLAG_GE</constant> - The driver is not allowed to
shrink the rectangle. The original rectangle must lay inside the adjusted
one.</para>
</listitem>
<listitem>
<para><constant>V4L2_SEL_FLAG_LE</constant> - The driver is not allowed to
enlarge the rectangle. The adjusted rectangle must lay inside the original
one.</para>
</listitem>
<listitem>
<para><constant>V4L2_SEL_FLAG_GE | V4L2_SEL_FLAG_LE</constant> - The driver
must choose the size exactly the same as in the requested rectangle.</para>
</listitem>
</itemizedlist>
Please refer to <xref linkend="sel-const-adjust" />.
</para>
<para> The driver may have to adjusts the requested dimensions against hardware
limits and other parts as the pipeline, i.e. the bounds given by the
capture/output window or TV display. The closest possible values of horizontal
and vertical offset and sizes are chosen according to following priority:
<orderedlist>
<listitem>
<para>Satisfy constraints from <structfield>&v4l2-selection;::flags</structfield>.</para>
</listitem>
<listitem>
<para>Adjust width, height, left, and top to hardware limits and alignments.</para>
</listitem>
<listitem>
<para>Keep center of adjusted rectangle as close as possible to the original one.</para>
</listitem>
<listitem>
<para>Keep width and height as close as possible to original ones.</para>
</listitem>
<listitem>
<para>Keep horizontal and vertical offset as close as possible to original ones.</para>
</listitem>
</orderedlist>
On success the field <structfield> &v4l2-selection;::r </structfield> contains
the adjusted rectangle. When the parameters are unsuitable the application may
modify the cropping (composing) or image parameters and repeat the cycle until
satisfactory parameters have been negotiated. If constraints flags have to be
violated at then ERANGE is returned. The error indicates that <emphasis> there
exist no rectangle </emphasis> that satisfies the constraints.</para>
</refsect1>
<refsect1>
<table frame="none" pgwide="1" id="v4l2-sel-target">
<title>Selection targets.</title>
<tgroup cols="3">
&cs-def;
<tbody valign="top">
<row>
<entry><constant>V4L2_SEL_TGT_CROP_ACTIVE</constant></entry>
<entry>0</entry>
<entry>area that is currently cropped by hardware</entry>
</row>
<row>
<entry><constant>V4L2_SEL_TGT_CROP_DEFAULT</constant></entry>
<entry>1</entry>
<entry>suggested cropping rectangle that covers the "whole picture"</entry>
</row>
<row>
<entry><constant>V4L2_SEL_TGT_CROP_BOUNDS</constant></entry>
<entry>2</entry>
<entry>limits for the cropping rectangle</entry>
</row>
<row>
<entry><constant>V4L2_SEL_TGT_COMPOSE_ACTIVE</constant></entry>
<entry>256</entry>
<entry>area to which data are composed by hardware</entry>
</row>
<row>
<entry><constant>V4L2_SEL_TGT_COMPOSE_DEFAULT</constant></entry>
<entry>257</entry>
<entry>suggested composing rectangle that covers the "whole picture"</entry>
</row>
<row>
<entry><constant>V4L2_SEL_TGT_COMPOSE_BOUNDS</constant></entry>
<entry>258</entry>
<entry>limits for the composing rectangle</entry>
</row>
<row>
<entry><constant>V4L2_SEL_TGT_COMPOSE_PADDED</constant></entry>
<entry>259</entry>
<entry>the active area and all padding pixels that are inserted or modified by the hardware</entry>
</row>
</tbody>
</tgroup>
</table>
</refsect1>
<refsect1>
<table frame="none" pgwide="1" id="v4l2-sel-flags">
<title>Selection constraint flags</title>
<tgroup cols="3">
&cs-def;
<tbody valign="top">
<row>
<entry><constant>V4L2_SEL_FLAG_GE</constant></entry>
<entry>0x00000001</entry>
<entry>indicate that adjusted rectangle must contain a rectangle from <structfield>&v4l2-selection;::r</structfield></entry>
</row>
<row>
<entry><constant>V4L2_SEL_FLAG_LE</constant></entry>
<entry>0x00000002</entry>
<entry>indicate that adjusted rectangle must be inside a rectangle from <structfield>&v4l2-selection;::r</structfield></entry>
</row>
</tbody>
</tgroup>
</table>
</refsect1>
<section>
<figure id="sel-const-adjust">
<title>Size adjustments with constraint flags.</title>
<mediaobject>
<imageobject>
<imagedata fileref="constraints.png" format="PNG" />
</imageobject>
<textobject>
<phrase>Behaviour of rectangle adjustment for different constraint
flags.</phrase>
</textobject>
</mediaobject>
</figure>
</section>
<refsect1>
<table pgwide="1" frame="none" id="v4l2-selection">
<title>struct <structname>v4l2_selection</structname></title>
<tgroup cols="3">
&cs-str;
<tbody valign="top">
<row>
<entry>__u32</entry>
<entry><structfield>type</structfield></entry>
<entry>Type of the buffer (from &v4l2-buf-type;)</entry>
</row>
<row>
<entry>__u32</entry>
<entry><structfield>target</structfield></entry>
<entry>used to select between <link linkend="v4l2-sel-target"> cropping and composing rectangles </link></entry>
</row>
<row>
<entry>__u32</entry>
<entry><structfield>flags</structfield></entry>
<entry>control over coordinates adjustments, refer to <link linkend="v4l2-sel-flags">selection flags</link></entry>
</row>
<row>
<entry>&v4l2-rect;</entry>
<entry><structfield>r</structfield></entry>
<entry>selection rectangle</entry>
</row>
<row>
<entry>__u32</entry>
<entry><structfield>reserved[9]</structfield></entry>
<entry>Reserved fields for future use</entry>
</row>
</tbody>
</tgroup>
</table>
</refsect1>
<refsect1>
&return-value;
<variablelist>
<varlistentry>
<term><errorcode>EINVAL</errorcode></term>
<listitem>
<para>The buffer <structfield> &v4l2-selection;::type </structfield>
or <structfield> &v4l2-selection;::target </structfield> is not supported, or
the <structfield> &v4l2-selection;::flags </structfield> are invalid.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><errorcode>ERANGE</errorcode></term>
<listitem>
<para>it is not possible to adjust a rectangle <structfield>
&v4l2-selection;::r </structfield> that satisfies all contraints from
<structfield> &v4l2-selection;::flags </structfield>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><errorcode>EBUSY</errorcode></term>
<listitem>
<para>it is not possible to apply change of selection rectangle at the moment.
Usually because streaming is in progress.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
</refentry>

8
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@ -88,11 +88,3 @@ standards.</para>
</variablelist>
</refsect1>
</refentry>
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18
Documentation/DocBook/media/v4l/vidioc-g-tuner.xml
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@ -318,6 +318,16 @@ standard.</para><!-- FIXME what if PAL+NTSC and Bi but not SAP? --></entry>
<entry>RDS capture is supported. This capability is only valid for
radio tuners.</entry>
</row>
<row>
<entry><constant>V4L2_TUNER_CAP_RDS_BLOCK_IO</constant></entry>
<entry>0x0100</entry>
<entry>The RDS data is passed as unparsed RDS blocks.</entry>
</row>
<row>
<entry><constant>V4L2_TUNER_CAP_RDS_CONTROLS</constant></entry>
<entry>0x0200</entry>
<entry>The RDS data is parsed by the hardware and set via controls.</entry>
</row>
</tbody>
</tgroup>
</table>
@ -525,11 +535,3 @@ out of bounds.</para>
</variablelist>
</refsect1>
</refentry>
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8
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@ -100,11 +100,3 @@ supported, or the <structfield>index</structfield> is out of bounds.</para>
</variablelist>
</refsect1>
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8
Documentation/DocBook/media/v4l/vidioc-queryctrl.xml
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@ -443,11 +443,3 @@ or this particular menu item is not supported by the driver.</para>
</variablelist>
</refsect1>
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8
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@ -125,11 +125,3 @@ wrong.</para>
</variablelist>
</refsect1>
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2
Documentation/DocBook/writing-an-alsa-driver.tmpl
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@ -404,7 +404,7 @@
/* SNDRV_CARDS: maximum number of cards supported by this module */
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
/* definition of the chip-specific record */
struct mychip {

55
Documentation/acpi/apei/einj.txt
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@ -47,20 +47,53 @@ directory apei/einj. The following files are provided.
- param1
This file is used to set the first error parameter value. Effect of
parameter depends on error_type specified. For memory error, this is
physical memory address. Only available if param_extension module
parameter is specified.
parameter depends on error_type specified.
- param2
This file is used to set the second error parameter value. Effect of
parameter depends on error_type specified. For memory error, this is
physical memory address mask. Only available if param_extension
module parameter is specified.
parameter depends on error_type specified.
BIOS versions based in the ACPI 4.0 specification have limited options
to control where the errors are injected. Your BIOS may support an
extension (enabled with the param_extension=1 module parameter, or
boot command line einj.param_extension=1). This allows the address
and mask for memory injections to be specified by the param1 and
param2 files in apei/einj.
BIOS versions using the ACPI 5.0 specification have more control over
the target of the injection. For processor related errors (type 0x1,
0x2 and 0x4) the APICID of the target should be provided using the
param1 file in apei/einj. For memory errors (type 0x8, 0x10 and 0x20)
the address is set using param1 with a mask in param2 (0x0 is equivalent
to all ones). For PCI express errors (type 0x40, 0x80 and 0x100) the
segment, bus, device and function are specified using param1:
31 24 23 16 15 11 10 8 7 0
+-------------------------------------------------+
| segment | bus | device | function | reserved |
+-------------------------------------------------+
An ACPI 5.0 BIOS may also allow vendor specific errors to be injected.
In this case a file named vendor will contain identifying information
from the BIOS that hopefully will allow an application wishing to use
the vendor specific extension to tell that they are running on a BIOS
that supports it. All vendor extensions have the 0x80000000 bit set in
error_type. A file vendor_flags controls the interpretation of param1
and param2 (1 = PROCESSOR, 2 = MEMORY, 4 = PCI). See your BIOS vendor
documentation for details (and expect changes to this API if vendors
creativity in using this feature expands beyond our expectations).
Example:
# cd /sys/kernel/debug/apei/einj
# cat available_error_type # See which errors can be injected
0x00000002 Processor Uncorrectable non-fatal
0x00000008 Memory Correctable
0x00000010 Memory Uncorrectable non-fatal
# echo 0x12345000 > param1 # Set memory address for injection
# echo 0xfffffffffffff000 > param2 # Mask - anywhere in this page
# echo 0x8 > error_type # Choose correctable memory error
# echo 1 > error_inject # Inject now
Injecting parameter support is a BIOS version specific extension, that
is, it only works on some BIOS version. If you want to use it, please
make sure your BIOS version has the proper support and specify
"param_extension=y" in module parameter.
For more information about EINJ, please refer to ACPI specification
version 4.0, section 17.5.
version 4.0, section 17.5 and ACPI 5.0, section 18.6.

51
Documentation/cgroups/cgroups.txt
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@ -594,53 +594,44 @@ rmdir() will fail with it. From this behavior, pre_destroy() can be
called multiple times against a cgroup.
int can_attach(struct cgroup_subsys *ss, struct cgroup *cgrp,
struct task_struct *task)
struct cgroup_taskset *tset)
(cgroup_mutex held by caller)
Called prior to moving a task into a cgroup; if the subsystem
returns an error, this will abort the attach operation. If a NULL
task is passed, then a successful result indicates that *any*
unspecified task can be moved into the cgroup. Note that this isn't
called on a fork. If this method returns 0 (success) then this should
remain valid while the caller holds cgroup_mutex and it is ensured that either
Called prior to moving one or more tasks into a cgroup; if the
subsystem returns an error, this will abort the attach operation.
@tset contains the tasks to be attached and is guaranteed to have at
least one task in it.
If there are multiple tasks in the taskset, then:
- it's guaranteed that all are from the same thread group
- @tset contains all tasks from the thread group whether or not
they're switching cgroups
- the first task is the leader
Each @tset entry also contains the task's old cgroup and tasks which
aren't switching cgroup can be skipped easily using the
cgroup_taskset_for_each() iterator. Note that this isn't called on a
fork. If this method returns 0 (success) then this should remain valid
while the caller holds cgroup_mutex and it is ensured that either
attach() or cancel_attach() will be called in future.
int can_attach_task(struct cgroup *cgrp, struct task_struct *tsk);
(cgroup_mutex held by caller)
As can_attach, but for operations that must be run once per task to be
attached (possibly many when using cgroup_attach_proc). Called after
can_attach.
void cancel_attach(struct cgroup_subsys *ss, struct cgroup *cgrp,
struct task_struct *task, bool threadgroup)
struct cgroup_taskset *tset)
(cgroup_mutex held by caller)
Called when a task attach operation has failed after can_attach() has succeeded.
A subsystem whose can_attach() has some side-effects should provide this
function, so that the subsystem can implement a rollback. If not, not necessary.
This will be called only about subsystems whose can_attach() operation have
succeeded.
void pre_attach(struct cgroup *cgrp);
(cgroup_mutex held by caller)
For any non-per-thread attachment work that needs to happen before
attach_task. Needed by cpuset.
succeeded. The parameters are identical to can_attach().
void attach(struct cgroup_subsys *ss, struct cgroup *cgrp,
struct cgroup *old_cgrp, struct task_struct *task)
struct cgroup_taskset *tset)
(cgroup_mutex held by caller)
Called after the task has been attached to the cgroup, to allow any
post-attachment activity that requires memory allocations or blocking.
void attach_task(struct cgroup *cgrp, struct task_struct *tsk);
(cgroup_mutex held by caller)
As attach, but for operations that must be run once per task to be attached,
like can_attach_task. Called before attach. Currently does not support any
subsystem that might need the old_cgrp for every thread in the group.
The parameters are identical to can_attach().
void fork(struct cgroup_subsy *ss, struct task_struct *task)

9
Documentation/cgroups/memory.txt
View File

@ -61,7 +61,7 @@ Brief summary of control files.
memory.failcnt # show the number of memory usage hits limits
memory.memsw.failcnt # show the number of memory+Swap hits limits
memory.max_usage_in_bytes # show max memory usage recorded
memory.memsw.usage_in_bytes # show max memory+Swap usage recorded
memory.memsw.max_usage_in_bytes # show max memory+Swap usage recorded
memory.soft_limit_in_bytes # set/show soft limit of memory usage
memory.stat # show various statistics
memory.use_hierarchy # set/show hierarchical account enabled
@ -410,8 +410,11 @@ memory.stat file includes following statistics
cache - # of bytes of page cache memory.
rss - # of bytes of anonymous and swap cache memory.
mapped_file - # of bytes of mapped file (includes tmpfs/shmem)
pgpgin - # of pages paged in (equivalent to # of charging events).
pgpgout - # of pages paged out (equivalent to # of uncharging events).
pgpgin - # of charging events to the memory cgroup. The charging
event happens each time a page is accounted as either mapped
anon page(RSS) or cache page(Page Cache) to the cgroup.
pgpgout - # of uncharging events to the memory cgroup. The uncharging
event happens each time a page is unaccounted from the cgroup.
swap - # of bytes of swap usage
inactive_anon - # of bytes of anonymous memory and swap cache memory on
LRU list.

10
Documentation/coccinelle.txt
View File

@ -102,9 +102,15 @@ or
make coccicheck COCCI=<my_SP.cocci> MODE=report
Using Coccinelle on (modified) files
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Controlling Which Files are Processed by Coccinelle
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
By default the entire kernel source tree is checked.
To apply Coccinelle to a specific directory, M= can be used.
For example, to check drivers/net/wireless/ one may write:
make coccicheck M=drivers/net/wireless/
To apply Coccinelle on a file basis, instead of a directory basis, the
following command may be used:

3
Documentation/devices.txt
View File

@ -447,6 +447,9 @@ Your cooperation is appreciated.
234 = /dev/btrfs-control Btrfs control device
235 = /dev/autofs Autofs control device
236 = /dev/mapper/control Device-Mapper control device
237 = /dev/loop-control Loopback control device
238 = /dev/vhost-net Host kernel accelerator for virtio net
240-254 Reserved for local use
255 Reserved for MISC_DYNAMIC_MINOR

8
Documentation/devicetree/bindings/arm/fsl.txt
View File

@ -21,6 +21,10 @@ i.MX53 Smart Mobile Reference Design Board
Required root node properties:
- compatible = "fsl,imx53-smd", "fsl,imx53";
i.MX6 Quad SABRE Automotive Board
i.MX6 Quad Armadillo2 Board
Required root node properties:
- compatible = "fsl,imx6q-sabreauto", "fsl,imx6q";
- compatible = "fsl,imx6q-arm2", "fsl,imx6q";
i.MX6 Quad SABRE Lite Board
Required root node properties:
- compatible = "fsl,imx6q-sabrelite", "fsl,imx6q";

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