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/Documentation/driver-api/media/drivers/ccs/
Dccs-regs.asc1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-3-Clause
2 # Copyright (C) 2019--2020 Intel Corporation
5 # - f field LSB MSB rflags
6 # - e enum value # after a field
7 # - e enum value [LSB MSB]
8 # - b bool bit
9 # - l arg name min max elsize [discontig...]
12 # 8, 16, 32 register bits (default is 8)
13 # v1.1 defined in version 1.1
20 module_revision_number_major 0x0002 8
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/Documentation/gpu/
Dafbc.rst1 .. SPDX-License-Identifier: GPL-2.0+
8 It provides fine-grained random access and minimizes the amount of
21 AFBC streams can contain several components - where a component
32 * Component 1: G
37 reside in the least-significant bits of the corresponding linear
42 * Component 0: R(8)
43 * Component 1: G(8)
44 * Component 2: B(8)
45 * Component 3: A(8)
49 * Component 0: R(8)
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/Documentation/devicetree/bindings/ptp/
Dptp-idtcm.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/ptp/ptp-idtcm.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Vincent Cheng <vincent.cheng.xh@renesas.com>
16 - idt,8a34000
17 - idt,8a34001
18 - idt,8a34002
19 - idt,8a34003
20 - idt,8a34004
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/Documentation/admin-guide/media/
Ddvb_intro.rst1 .. SPDX-License-Identifier: GPL-2.0
12 structure of DVB-T cards are substantially similar to Analogue TV cards,
30 embedded within the modulated composite analogue signal -
38 signal encoded at a resolution of 768x576 24-bit color pixels over 25
39 frames per second - a fair amount of data is generated and must be
43 encoded and compressed form - similar to the form that is used in
46 The purpose of a simple budget digital TV card (DVB-T,C or S) is to
96 On this example, we're considering tuning into DVB-T channels in
102 Table 1. Transponder Frequencies Mount Dandenong, Vic, Aus.
115 The digital TV Scan utilities (like dvbv5-scan) have use a set of
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/Documentation/devicetree/bindings/leds/
Dleds-lp55xx.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/leds/leds-lp55xx.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jacek Anaszewski <jacek.anaszewski@gmail.com>
11 - Pavel Machek <pavel@ucw.cz>
27 - national,lp5521
28 - national,lp5523
29 - ti,lp55231
30 - ti,lp5562
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/Documentation/devicetree/bindings/input/touchscreen/
Dadi,ad7879.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Analog Devices AD7879(-1)/AD7889(-1) touchscreen interface (SPI/I2C)
10 - Frank Li <Frank.Li@nxp.com>
16 for I2C slave, use "adi,ad7879-1"
18 - adi,ad7879
19 - adi,ad7879-1
22 maxItems: 1
25 maxItems: 1
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/Documentation/admin-guide/device-mapper/
Ddm-service-time.rst2 dm-service-time
5 dm-service-time is a path selector module for device-mapper targets,
10 of in-flight I/Os on a path with the performance value of the path.
12 in a path-group, and it can be specified as a table argument.
14 The path selector name is 'service-time'.
26 among all paths in the path-group.
27 The valid range is 0-100.
28 If not given, minimum value '1' is used.
34 <status> <fail-count> <in-flight-size> <relative_throughput>
37 <fail-count>:
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Ddm-queue-length.rst2 dm-queue-length
5 dm-queue-length is a path selector module for device-mapper targets,
6 which selects a path with the least number of in-flight I/Os.
7 The path selector name is 'queue-length'.
18 Status for each path: <status> <fail-count> <in-flight>
23 <fail-count>: The number of path failures.
24 <in-flight>: The number of in-flight I/Os on the path.
30 dm-queue-length increments/decrements 'in-flight' when an I/O is
32 dm-queue-length selects a path with the minimum 'in-flight'.
41 # echo "0 10 multipath 0 0 1 1 queue-length 0 2 1 8:0 128 8:16 128" \
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/Documentation/tools/rtla/
Drtla-timerlat-top.rst2 rtla-timerlat-top
4 -------------------------------------------
6 -------------------------------------------
8 :Manual section: 1
22 seem with the option **-T**.
35 **--aa-only** *us*
38 Print the auto-analysis if the system hits the stop tracing condition. This option
45 In the example below, the timerlat tracer is dispatched in cpus *1-23* in the
49 # timerlat -a 40 -c 1-23 -q
53 1 #12322 | 0 0 1 15 | 10 3 9 31
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/Documentation/trace/postprocess/
Dtrace-pagealloc-postprocess.pl4 # to extract some high-level information on what is going on. The accuracy of the parser
7 # Example usage: trace-pagealloc-postprocess.pl < /sys/kernel/tracing/trace_pipe
9 # --prepend-parent Report on the parent proc and PID
10 # --read-procstat If the trace lacks process info, get it from /proc
11 # --ignore-pid Aggregate processes of the same name together
19 use constant MM_PAGE_ALLOC => 1;
28 use constant STATE_PCPU_PAGES_DRAINED => 8;
31 # High-level events extrapolated from tracepoints
52 if ($current_time - 2 > $sigint_received) {
53 print "SIGINT received, report pending. Hit ctrl-c again to exit\n";
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/Documentation/devicetree/bindings/media/
Dti,da850-vpif.txt2 ----------------------
12 - compatible: must be "ti,da850-vpif"
13 - reg: physical base address and length of the registers set for the device;
14 - interrupts: should contain IRQ line for the VPIF
18 VPIF has a 16-bit parallel bus input, supporting 2 8-bit channels or a
19 single 16-bit channel. It should contain one or two port child nodes
21 describe the input and port@1 output channels. Please refer to the
23 Documentation/devicetree/bindings/media/video-interfaces.txt.
25 Example using 2 8-bit input channels, one of which is connected to an
26 I2C-connected TVP5147 decoder:
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/Documentation/ABI/testing/
Dsysfs-driver-toshiba_acpi1 What: /sys/devices/LNXSYSTM:00/LNXSYBUS:00/TOS{1900,620{0,7,8}}:00/kbd_backlight_mode
2 Date: June 8, 2014
8 * 0x1 -> FN-Z
9 * 0x2 -> AUTO (also called TIMER)
10 * 0x8 -> ON
11 * 0x10 -> OFF
14 parameters, kernel 3.15 only accepts the first two (FN-Z and
16 Also note that toggling this value on type 1 devices, requires
20 What: /sys/devices/LNXSYSTM:00/LNXSYBUS:00/TOS{1900,620{0,7,8}}:00/kbd_backlight_timeout
21 Date: June 8, 2014
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/Documentation/devicetree/bindings/leds/backlight/
Dlp855x-backlight.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/leds/backlight/lp855x-backlight.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Artur Weber <aweber.kernel@gmail.com>
15 - ti,lp8550
16 - ti,lp8551
17 - ti,lp8552
18 - ti,lp8553
19 - ti,lp8555
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/Documentation/filesystems/ext4/
Dblocks.rst1 .. SPDX-License-Identifier: GPL-2.0
4 ------
7 sectors between 1KiB and 64KiB, and the number of sectors must be an
17 For 32-bit filesystems, limits are as follows:
19 .. list-table::
20 :widths: 1 1 1 1 1
21 :header-rows: 1
23 * - Item
24 - 1KiB
25 - 2KiB
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/Documentation/translations/zh_CN/core-api/
Dpacking.rst1 .. SPDX-License-Identifier: GPL-2.0+
3 .. include:: ../disclaimer-zh_CN.rst
5 :Original: Documentation/core-api/packing.rst
22 --------
42 --------
46 - 将一个CPU可使用的数字打包到内存缓冲区中（具有硬件约束/特殊性）。
47 - 将内存缓冲区（具有硬件约束/特殊性）解压缩为一个CPU可使用的数字。
54 以下示例介绍了打包u64字段的内存布局。打包缓冲区中的字节偏移量始终默认为0，1...7。
57 1. 通常情况下（无特殊性），我们会这样做：
63 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
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/Documentation/devicetree/bindings/spi/
Dspi-sifive.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/spi/spi-sifive.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Pragnesh Patel <pragnesh.patel@sifive.com>
11 - Paul Walmsley <paul.walmsley@sifive.com>
12 - Palmer Dabbelt <palmer@sifive.com>
15 - $ref: spi-controller.yaml#
20 - enum:
21 - sifive,fu540-c000-spi
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/Documentation/devicetree/bindings/dma/
Dsnps,dma-spear1340.yaml1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
4 $id: http://devicetree.org/schemas/dma/snps,dma-spear1340.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Viresh Kumar <vireshk@kernel.org>
11 - Andy Shevchenko <andriy.shevchenko@linux.intel.com>
14 - $ref: dma-controller.yaml#
19 - const: snps,dma-spear1340
20 - items:
21 - enum:
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/Documentation/devicetree/bindings/media/i2c/
Dtda1997x.txt1 Device-Tree bindings for the NXP TDA1997x HDMI receiver
6 - RGB 8bit per color (24 bits total): R[11:4] B[11:4] G[11:4]
7 - YUV444 8bit per color (24 bits total): Y[11:4] Cr[11:4] Cb[11:4]
8 - YUV422 semi-planar 8bit per component (16 bits total): Y[11:4] CbCr[11:4]
9 - YUV422 semi-planar 10bit per component (20 bits total): Y[11:2] CbCr[11:2]
10 - YUV422 semi-planar 12bit per component (24 bits total): - Y[11:0] CbCr[11:0]
11 - YUV422 BT656 8bit per component (8 bits total): YCbCr[11:4] (2-cycles)
12 - YUV422 BT656 10bit per component (10 bits total): YCbCr[11:2] (2-cycles)
13 - YUV422 BT656 12bit per component (12 bits total): YCbCr[11:0] (2-cycles)
16 - RGB 12bit per color (36 bits total): R[11:0] B[11:0] G[11:0]
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/Documentation/userspace-api/media/rc/
Drc-protos.rst1 .. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
22 Some remotes have a pointer-type device which can used to control the
29 rc-5 (RC_PROTO_RC5)
30 -------------------
38 .. flat-table:: rc5 bits scancode mapping
39 :widths: 1 1 2
41 * - rc-5 bit
43 - scancode bit
45 - description
47 * - 1
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/Documentation/bpf/
Dverifier.rst32 After kernel function call, R1-R5 are reset to unreadable and
35 Since R6-R9 are callee saved, their state is preserved across the call.
39 bpf_mov R6 = 1
51 bpf_mov R1 = 1
65 bpf_ld R0 = *(u32 *)(R6 + 8)
67 intends to load a word from address R6 + 8 and store it into R0
69 that offset 8 of size 4 bytes can be accessed for reading, otherwise
72 stack bounds, which are [-MAX_BPF_STACK, 0). In this example offset is 8,
78 Classic BPF verifier does similar check with M[0-15] memory slots.
81 bpf_ld R0 = *(u32 *)(R10 - 4)
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/Documentation/devicetree/bindings/iio/adc/
Drenesas,rcar-gyroadc.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/iio/adc/renesas,rcar-gyroadc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Renesas R-Car GyroADC
10 - Marek Vasut <marek.vasut+renesas@gmail.com>
13 The GyroADC block is a reduced SPI block with up to 8 chipselect lines,
15 are sampled by the GyroADC block in a round-robin fashion and the result
23 - enum:
24 - renesas,r8a7791-gyroadc
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/Documentation/devicetree/bindings/hwmon/
Daspeed-pwm-tacho.txt3 The ASPEED PWM controller can support upto 8 PWM outputs. The ASPEED Fan Tacho
6 There can be upto 8 fans supported. Each fan can have one PWM output and
9 Required properties for pwm-tacho node:
10 - #address-cells : should be 1.
12 - #size-cells : should be 1.
14 - #cooling-cells: should be 2.
16 - reg : address and length of the register set for the device.
18 - pinctrl-names : a pinctrl state named "default" must be defined.
20 - pinctrl-0 : phandle referencing pin configuration of the PWM ports.
22 - compatible : should be "aspeed,ast2400-pwm-tacho" for AST2400 and
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/Documentation/driver-api/early-userspace/
Dbuffer-format.rst7 Last revision: 2002-01-13
18 formats, and can be created with the cpio(1) utility. The cpio
19 archive can be compressed using gzip(1). One valid version of an
28 GZIP() indicates the gzip(1) of the operand
29 ALGN(n) means padding with null bytes to an n-byte boundary
47 The cpio "TRAILER!!!" entry (cpio end-of-archive) is optional, but is
59 c_ino 8 bytes File inode number
60 c_mode 8 bytes File mode and permissions
61 c_uid 8 bytes File uid
62 c_gid 8 bytes File gid
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/Documentation/devicetree/bindings/ata/
Dceva,ahci-1v84.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/ata/ceva,ahci-1v84.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Mubin Sayyed <mubin.sayyed@amd.com>
11 - Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>
15 special extensions to add functionality, is a high-performance dual-port
22 const: ceva,ahci-1v84
25 maxItems: 1
28 maxItems: 1
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/Documentation/networking/
Darcnet-hardware.rst1 .. SPDX-License-Identifier: GPL-2.0
9 1) This file is a supplement to arcnet.txt. Please read that for general
11 2) This file is no longer Linux-specific. It should probably be moved out
17 e-mail apenwarr@worldvisions.ca with any settings for your particular card,
39 There are two "types" of ARCnet - STAR topology and BUS topology. This
46 well-designed standard. It uses something called "modified token passing"
47 which makes it completely incompatible with so-called "Token Ring" cards,
63 programming interface also means that when high-performance hardware
73 although they are generally kept down to the Ethernet-style 1500 bytes.
91 - Avery Pennraun <apenwarr@worldvisions.ca>
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