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| /Documentation/gpu/ |
| D | afbc.rst | 1 .. 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
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)
50 * Component 1: G(8)
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| /Documentation/userspace-api/media/rc/ |
| D | rc-protos.rst | 1 .. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
17 Other things can be encoded too. Some IR protocols encode a toggle bit; this
20 toggle bit will invert from one IR message to the next.
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
41 * - rc-5 bit
43 - scancode bit
45 - description
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| /Documentation/devicetree/bindings/media/i2c/ |
| D | tda1997x.txt | 1 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/v4l/ |
| D | metafmt-generic.rst | 1 .. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
8 Generic line-based metadata formats
14 These generic line-based metadata formats define the memory layout of the data
17 .. _v4l2-meta-fmt-generic-8:
20 -----------------------
22 The V4L2_META_FMT_GENERIC_8 format is a plain 8-bit metadata format. This format
23 is used on CSI-2 for 8 bits per :term:`Data Unit`.
26 packed into one 16-bit Data Unit. Otherwise the 16 bits per pixel dataformat is
27 :ref:`V4L2_META_FMT_GENERIC_CSI2_16 <v4l2-meta-fmt-generic-csi2-16>`.
34 .. flat-table:: Sample 4x2 Metadata Frame
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| /Documentation/devicetree/bindings/media/ |
| D | ti,da850-vpif.txt | 2 ----------------------
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
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:
29 compatible = "ti,da850-vpif";
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| D | ti-am437x-vpfe.txt | 2 --------------------------------------
6 processing capability to connect RAW image-sensor modules and video decoders
10 - compatible: must be "ti,am437x-vpfe"
11 - reg: physical base address and length of the registers set for the device;
12 - interrupts: should contain IRQ line for the VPFE;
13 - ti,am437x-vpfe-interface: can be one of the following,
14 0 - Raw Bayer Interface.
15 1 - 8 Bit BT656 Interface.
16 2 - 10 Bit BT656 Interface.
17 3 - YCbCr 8 Bit Interface.
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| /Documentation/staging/ |
| D | crc32.rst | 5 A CRC is a long-division remainder. You add the CRC to the message,
11 protocols put the end-of-frame flag after the CRC.
15 - We're working in binary, so the digits are only 0 and 1, and
16 - When dividing polynomials, there are no carries. Rather than add and
17 subtract, we just xor. Thus, we tend to get a bit sloppy about
21 To produce a 32-bit CRC, the divisor is actually a 33-bit CRC polynomial.
22 Since it's 33 bits long, bit 32 is always going to be set, so usually the
23 CRC is written in hex with the most significant bit omitted. (If you're
24 familiar with the IEEE 754 floating-point format, it's the same idea.)
28 the best error-detecting properties, this should correspond to the
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| /Documentation/ABI/testing/ |
| D | sysfs-class-net-peak_usb | 5 Contact: Stephane Grosjean <s.grosjean@peak-system.com>
7 PEAK PCAN-USB devices support user-configurable CAN channel
12 This attribute provides read-only access to the currently
14 device type, the identifier has a length of 8 or 32 bit. The
15 value read from this attribute is always an 8 digit 32 bit
17 supports an 8 bit identifier, the upper 24 bit of the value are
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| D | sysfs-driver-jz4780-efuse | 1 What: /sys/devices/*/<our-device>/nvmem
4 Description: read-only access to the efuse on the Ingenic JZ4780 SoC
5 The SoC has a one time programmable 8K efuse that is
10 0x000 64 bit Random Number
11 0x008 128 bit Ingenic Chip ID
12 0x018 128 bit Customer ID
13 0x028 3520 bit Reserved
14 0x1E0 8 bit Protect Segment
15 0x1E1 2296 bit HDMI Key
16 0x300 2048 bit Security boot key
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| /Documentation/devicetree/bindings/gpio/ |
| D | gpio-74xx-mmio.txt | 4 - compatible: Should contain one of the following:
5 "ti,741g125": for 741G125 (1-bit Input),
6 "ti,741g174": for 741G74 (1-bit Output),
7 "ti,742g125": for 742G125 (2-bit Input),
8 "ti,7474" : for 7474 (2-bit Output),
9 "ti,74125" : for 74125 (4-bit Input),
10 "ti,74175" : for 74175 (4-bit Output),
11 "ti,74365" : for 74365 (6-bit Input),
12 "ti,74174" : for 74174 (6-bit Output),
13 "ti,74244" : for 74244 (8-bit Input),
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| /Documentation/devicetree/bindings/mfd/ |
| D | mc13xxx.txt | 4 - compatible : Should be "fsl,mc13783" or "fsl,mc13892"
7 - fsl,mc13xxx-uses-adc : Indicate the ADC is being used
8 - fsl,mc13xxx-uses-codec : Indicate the Audio Codec is being used
9 - fsl,mc13xxx-uses-rtc : Indicate the RTC is being used
10 - fsl,mc13xxx-uses-touch : Indicate the touchscreen controller is being used
12 Sub-nodes:
13 - codec: Contain the Audio Codec node.
14 - adc-port: Contain PMIC SSI port number used for ADC.
15 - dac-port: Contain PMIC SSI port number used for DAC.
16 - leds : Contain the led nodes and initial register values in property
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| /Documentation/devicetree/bindings/dma/stm32/ |
| D | st,stm32-dma.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/dma/stm32/st,stm32-dma.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 The STM32 DMA is a general-purpose direct memory access controller capable of
11 supporting 8 independent DMA channels. Each channel can have up to 8 requests.
13 described in the dma.txt file, using a four-cell specifier for each
17 3. A 32bit mask specifying the DMA channel configuration which are device
19 -bit 9: Peripheral Increment Address
22 -bit 10: Memory Increment Address
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| D | st,stm32-mdma.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/dma/stm32/st,stm32-mdma.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 The STM32 MDMA is a general-purpose direct memory access controller capable of
13 described in the dma.txt file, using a five-cell specifier for each channel:
21 3. A 32bit mask specifying the DMA channel configuration
22 -bit 0-1: Source increment mode
26 -bit 2-3: Destination increment mode
30 -bit 8-9: Source increment offset size
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| /Documentation/devicetree/bindings/timer/ |
| D | renesas,cmt.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Geert Uytterhoeven <geert+renesas@glider.be>
11 - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
14 The CMT is a multi-channel 16/32/48-bit timer/counter with configurable clock
26 - items:
27 - enum:
28 - renesas,r8a7740-cmt0 # 32-bit CMT0 on R-Mobile A1
29 - renesas,r8a7740-cmt1 # 48-bit CMT1 on R-Mobile A1
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| /Documentation/devicetree/bindings/leds/ |
| D | register-bit-led.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/leds/register-bit-led.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Register Bit LEDs
10 - Linus Walleij <linus.walleij@linaro.org>
13 Register bit leds are used with syscon multifunctional devices where single
14 bits in a certain register can turn on/off a single LED. The register bit LEDs
20 - $ref: /schemas/leds/common.yaml#
25 The unit-address is in the form of @<reg addr>,<bit offset>
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| /Documentation/devicetree/bindings/clock/ |
| D | arm,syscon-icst.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/clock/arm,syscon-icst.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Linus Walleij <linusw@kernel.org>
19 an ICST clock request after a write to the 32 bit register at an offset
25 connects the low 8 bits of the VDW (missing one bit), hard-wires RDW to
26 different values and sometimes also hard-wires the output divider. They
37 Integrator/AP 22 1 Bit 8 0, rest variable
38 integratorap-cm
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| /Documentation/virt/kvm/devices/ |
| D | xics.rst | 1 .. SPDX-License-Identifier: GPL-2.0
25 -EINVAL Value greater than KVM_MAX_VCPU_IDS.
26 -EFAULT Invalid user pointer for attr->addr.
27 -EBUSY A vcpu is already connected to the device.
32 sources, each identified by a 20-bit source number, and a set of
41 KVM_GET_ONE_REG and KVM_SET_ONE_REG ioctls on the vcpu. The 64 bit
43 least-significant end of the word:
47 * Pending interrupt priority, 8 bits
50 * Pending IPI (inter-processor interrupt) priority, 8 bits
56 * Current processor priority, 8 bits
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| /Documentation/devicetree/bindings/clock/ti/ |
| D | autoidle.txt | 5 and a configuration bit setting. Autoidle clock is never an individual
7 or fixed-factor.
9 [1] Documentation/devicetree/bindings/clock/clock-bindings.txt
12 - reg : offset for the register controlling the autoidle
13 - ti,autoidle-shift : bit shift of the autoidle enable bit
14 - ti,invert-autoidle-bit : autoidle is enabled by setting the bit to 0
18 #clock-cells = <0>;
19 compatible = "ti,divider-clock";
21 ti,max-div = <31>;
22 ti,autoidle-shift = <8>;
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| /Documentation/devicetree/bindings/edac/ |
| D | aspeed-sdram-edac.txt | 6 The memory controller supports SECDED (single bit error correction, double bit
7 error detection) and single bit error auto scrubbing by reserving 8 bits for
8 every 64 bit word (effectively reducing available memory to 8/9).
14 - compatible: should be one of
15 - "aspeed,ast2400-sdram-edac"
16 - "aspeed,ast2500-sdram-edac"
17 - "aspeed,ast2600-sdram-edac"
18 - reg: sdram controller register set should be <0x1e6e0000 0x174>
19 - interrupts: should be AVIC interrupt #0
25 compatible = "aspeed,ast2500-sdram-edac";
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| /Documentation/bpf/ |
| D | classic_vs_extended.rst | 12 - Number of registers increase from 2 to 10:
15 new layout extends this to be 10 internal registers and a read-only frame
16 pointer. Since 64-bit CPUs are passing arguments to functions via registers
17 the number of args from eBPF program to in-kernel function is restricted
18 to 5 and one register is used to accept return value from an in-kernel
20 sparcv9/mips64 have 7 - 8 registers for arguments; x86_64 has 6 callee saved
25 64-bit architectures.
27 On 32-bit architectures JIT may map programs that use only 32-bit arithmetic
30 R0 - R5 are scratch registers and eBPF program needs spill/fill them if
33 call predefined in-kernel functions, though.
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| /Documentation/fb/ |
| D | arkfb.rst | 2 arkfb - fbdev driver for ARK Logic chips
12 - only BIOS initialized VGA devices supported
13 - probably not working on big endian
19 * 4 bpp pseudocolor modes (with 18bit palette, two variants)
20 * 8 bpp pseudocolor mode (with 18bit palette)
31 hardware). This limitation is not enforced by driver. Text mode supports 8bit
32 wide fonts only (hardware limitation) and 16bit tall fonts (driver
39 8bit wide fonts only (driver limitation).
54 * support for fontwidths != 8 in 4 bpp modes
59 * acceleration support (8514-like 2D)
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| /Documentation/arch/sparc/oradax/ |
| D | dax-hv-api.txt | 3 Publication date 2017-09-25 08:21
5 Extracted via "pdftotext -f 547 -l 572 -layout sun4v_20170925.pdf"
16 live-migration and other system management activities.
20 …high speed processoring of database-centric operations. The coprocessors may support one or more of
28 …e Completion Area and, unless execution order is specifically restricted through the use of serial-
45 …device node in the guest MD (Section 8.24.17, “Database Analytics Accelerators (DAX) virtual-device
51 36.1.1.1. "ORCL,sun4v-dax" Device Compatibility
54 • No-op/Sync
81 36.1.1.2. "ORCL,sun4v-dax-fc" Device Compatibility
82 … "ORCL,sun4v-dax-fc" is compatible with the "ORCL,sun4v-dax" interface, and includes additional CCB
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| /Documentation/devicetree/bindings/net/ |
| D | lantiq,pef2256.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Herve Codina <herve.codina@bootlin.com>
20 - const: lantiq,pef2256
27 - description: Master Clock
28 - description: System Clock Receive
29 - description: System Clock Transmit
31 clock-names:
33 - const: mclk
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| /Documentation/core-api/ |
| D | packing.rst | 6 -----------------
10 One can memory-map a pointer to a carefully crafted struct over the hardware
15 definitions from the hardware documentation into bit field indices for the
18 (sometimes even 64 bit ones). This creates the inconvenience of having to
23 were performed byte-by-byte. Also the code can easily get cluttered, and the
24 high-level idea might get lost among the many bit shifts required.
25 Many drivers take the bit-shifting approach and then attempt to reduce the
30 ------------
34 - Packing a CPU-usable number into a memory buffer (with hardware
36 - Unpacking a memory buffer (which has hardware constraints/quirks)
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| /Documentation/networking/device_drivers/cellular/qualcomm/ |
| D | rmnet.rst | 1 .. SPDX-License-Identifier: GPL-2.0
24 sending aggregated bunch of MAP frames. rmnet driver will de-aggregate
36 Bit 0 1 2-7 8-15 16-31
39 Bit 32-x
42 Command (1)/ Data (0) bit value is to indicate if the packet is a MAP command
62 Bit 0 1 2-7 8-15 16-31
65 Bit 32-(x-33) (x-32)-x
68 Command (1)/ Data (0) bit value is to indicate if the packet is a MAP command
87 Bit 0-14 15 16-31
90 Bit 31-47 48-64
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