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/linux/Documentation/userspace-api/media/drivers/
H A Daspeed-video.rst1 .. SPDX-License-Identifier: GPL-2.0
8 ASPEED Video Engine found on AST2400/2500/2600 SoC supports high performance
9 video compressions with a wide range of video quality and compression ratio
15 * ASPEED proprietary mode: for multi-frame and differential compression.
16 Support 2-pass (high quality) video compression scheme (Patent pending by
17 ASPEED). Provide visually lossless video compression quality or to reduce
26 `github <https://github.com/AspeedTech-BMC/openbmc/releases/>`__.
28 The ASPEED video driver implements the following driver-specific control:
31 ---------------------------
32 Enable/Disable ASPEED's High quality mode. This is a private control
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/linux/Documentation/userspace-api/media/v4l/
H A Dvidioc-g-parm.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 VIDIOC_G_PARM - VIDIOC_S_PARM - Get or set streaming parameters
63 .. flat-table:: struct v4l2_streamparm
64 :header-rows: 0
65 :stub-columns: 0
68 * - __u32
69 - ``type``
70 - The buffer (stream) type, same as struct
73 * - union {
74 - ``parm``
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H A Dext-ctrls-codec.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
3 .. _codec-controls:
24 .. _mpeg-control-id:
27 -----------------
35 .. _v4l2-mpeg-stream-type:
40 enum v4l2_mpeg_stream_type -
41 The MPEG-1, -2 or -4 output stream type. One cannot assume anything
48 .. flat-table::
49 :header-rows: 0
50 :stub-columns: 0
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H A Dstreaming-par.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
4 .. _streaming-par:
11 as well as I/O. Presently applications can request a high quality
/linux/Documentation/netlink/specs/
H A Ddpll.yaml1 # SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
2 ---
8 -
16 -
20 -
23 render-max: true
24 -
26 name: lock-status
31 -
37 -
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/linux/Documentation/admin-guide/media/
H A Dsi476x.rst1 .. SPDX-License-Identifier: GPL-2.0
12 -------------------
14 - According to the SiLabs' datasheet it is possible to update the
15 firmware of the radio chip in the run-time, thus bringing it to the
23 -------------------------------
31 * /sys/kernel/debug/<device-name>/acf
52 0x05 smute 0 - Audio is not soft muted
53 1 - Audio is soft muted
60 0x10 pilot 0 - Stereo pilot is not present
61 1 - Stereo pilot is present
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/linux/drivers/gpu/drm/sti/
H A DNOTES2 ---------------------------
4 - The High Quality Video Display Processor (HQVDP) gets video frames from a
5 video decoder and does high quality video processing, including scaling.
7 - The Compositor is a multiplane, dual-mixer (Main & Aux) digital processor. It
9 - The graphics planes are internally processed by the Generic Display
11 - The video plug (VID) connects to the HQVDP output.
12 - The cursor handles ... a cursor.
13 - The TV OUT pre-formats (convert, clip, round) the compositor output data
14 - The HDMI / DVO / HD Analog / SD analog IP builds the video signals
15 - DVO (Digital Video Output) handles a 24bits parallel signal
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/linux/Documentation/devicetree/bindings/mfd/
H A Dtwl6040.txt3 The TWL6040s are 8-channel high quality low-power audio codecs providing audio,
9 - compatible : "ti,twl6040" for twl6040, "ti,twl6041" for twl6041
10 - reg: must be 0x4b for i2c address
11 - interrupts: twl6040 has one interrupt line connecteded to the main SoC
12 - gpio-controller:
13 - #gpio-cells = <1>: twl6040 provides GPO lines.
14 - #clock-cells = <0>; twl6040 is a provider of pdmclk which is used by McPDM
15 - twl6040,audpwron-gpio: Power on GPIO line for the twl6040
17 - vio-supply: Regulator for the twl6040 VIO supply
18 - v2v1-supply: Regulator for the twl6040 V2V1 supply
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/linux/Documentation/networking/
H A Dtcp-thin.rst1 .. SPDX-License-Identifier: GPL-2.0
4 Thin-streams and TCP
7 A wide range of Internet-based services that use reliable transport
8 protocols display what we call thin-stream properties. This means
11 effective. In time-dependent scenarios (like online games, control
14 the service quality. Extreme latencies are caused by TCP's
19 After analysing a large number of time-dependent interactive
22 lifespan. The combination of time-dependency and the fact that the
23 streams provoke high latencies when using TCP is unfortunate.
25 In order to reduce application-layer latency when packets are lost,
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/linux/lib/fonts/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
12 bool "Select compiled-in fonts"
29 This is the "high resolution" font for the VGA frame buffer (the one
32 Note that this is a poor quality font. The VGA 8x16 font is quite a
42 This is the "high resolution" font for the VGA frame buffer (the one
52 Small console font with Macintosh-style high-half glyphs. Some Mac
68 Small console font with PC-style control-character and high-half
76 Small console font with PC-style control characters and high-half
84 bool "Medium-size 6x10 font"
87 Medium-size console font. Suitable for framebuffer consoles on
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/linux/include/linux/mfd/
H A Dsi476x-reports.h1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * include/media/si476x-platform.h -- Definitions of the data formats
15 * struct si476x_rsq_status - structure containing received signal
16 * quality
17 * @multhint: Multipath Detect High.
18 * true - Indicatedes that the value is below
20 * false - Indicatedes that the value is above
23 * true - Indicatedes that the value is below
25 * false - Indicatedes that the value is above
27 * @snrhint: SNR Detect High.
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/linux/Documentation/devicetree/bindings/display/bridge/
H A Dite,it6505.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Allen Chen <allen.chen@ite.com.tw>
13 - $ref: /schemas/sound/dai-common.yaml#
16 The IT6505 is a high-performance DisplayPort 1.1a transmitter,
19 and ensures robust transmission of high-quality uncompressed video
30 transmission of high-definition content. Users of the IT6505 need not
40 ovdd-supply:
43 pwr18-supply:
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/linux/include/uapi/linux/
H A Dwireless.h1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
7 * Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com>
8 * Copyright (c) 1997-2007 Jean Tourrilhes, All Rights Reserved.
16 * Initial APIs (1996 -> onward) :
17 * -----------------------------
44 * New driver API (2002 -> onward) :
45 * -------------------------------
53 * Wireless Events (2002 -> onward) :
54 * --------------------------------
59 * --------------
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/linux/drivers/media/platform/samsung/s5p-jpeg/
H A Djpeg-core.h1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* linux/drivers/media/platform/samsung/s5p-jpeg/jpeg-core.h
15 #include <media/v4l2-device.h>
16 #include <media/v4l2-fh.h>
17 #include <media/v4l2-ctrls.h>
19 #define S5P_JPEG_M2M_NAME "s5p-jpeg"
23 /* JPEG compression quality setting */
53 #define S5P_JPEG_DISABLE -1
83 QUALITY_LEVEL_1 = 0, /* high */
95 * struct s5p_jpeg - JPEG IP abstraction
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/linux/Documentation/hwmon/
H A Daquacomputer_d5next.rst1 .. SPDX-License-Identifier: GPL-2.0-or-later
3 Kernel driver aquacomputer-d5next
14 * Aquacomputer High Flow Next sensor
19 * Aquacomputer High Flow USB flow meter
25 -----------
37 available through debugfs are the serial number, firmware version and power-on
39 temperature curves directly from the pump. If it's not connected, the fan-related
59 The High Flow Next exposes +5V voltages, water quality, conductivity and flow readings.
65 filled with coolant. Pump RPM and flow can be set to enhance on-device calculations,
78 The High Flow USB exposes an internal and external temperature sensor, and a flow meter.
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/linux/Documentation/driver-api/
H A Di2c.rst5 the "Inter-IC" bus, a simple bus protocol which is widely used where low
7 some vendors use another name (such as "Two-Wire Interface", TWI) for
9 conserving board real estate and minimizing signal quality issues. Most
11 there's a high speed extension (3.4 MHz) that's not yet found wide use.
12 I2C is a multi-master bus; open drain signaling is used to arbitrate
38 .. kernel-doc:: include/linux/i2c.h
41 .. kernel-doc:: drivers/i2c/i2c-boardinfo.c
44 .. kernel-doc:: drivers/i2c/i2c-core-base.c
47 .. kernel-doc:: drivers/i2c/i2c-core-smbus.c
/linux/Documentation/admin-guide/mm/damon/
H A Dreclaim.rst1 .. SPDX-License-Identifier: GPL-2.0
4 DAMON-based Reclamation
7 DAMON-based Reclamation (DAMON_RECLAIM) is a static kernel module that aimed to
9 It doesn't aim to replace the LRU-list based page_granularity reclamation, but
15 On general memory over-committed systems, proactively reclaiming cold pages
20 Free Pages Reporting [3]_ based memory over-commit virtualization systems are
24 guests could be not so memory-frugal, mainly because some kernel subsystems and
25 user-space applications are designed to use as much memory as available. Then,
54 -------
60 no real monitoring and reclamation due to the watermarks-based activation
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H A Dlru_sort.rst1 .. SPDX-License-Identifier: GPL-2.0
4 DAMON-based LRU-lists Sorting
7 DAMON-based LRU-lists Sorting (DAMON_LRU_SORT) is a static kernel module that
9 (de)prioritization of pages on their LRU-lists for making LRU-lists a more
12 Where Proactive LRU-lists Sorting is Required?
15 As page-granularity access checking overhead could be significant on huge
23 Because DAMON can identify access patterns of best-effort accuracy while
24 inducing only user-specified range of overhead, proactively running
32 rates that higher than a user-specified threshold) and cold pages (pages of
34 user-specified threshold) using DAMON, and prioritizes hot pages while
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/linux/arch/m68k/amiga/
H A Damisound.c24 0, -39, -75, -103, -121, -127, -121, -103, -75, -39
35 volatile unsigned short amiga_audio_min_period = 124; /* Default for pre-OCS */
64 /* without amifb, turn video off and enable high quality sound */ in amiga_init_sound()
/linux/tools/power/x86/x86_energy_perf_policy/
H A Dx86_energy_perf_policy.81 .\" This page Copyright (C) 2010 - 2015 Len Brown <len.brown@intel.com>
5 x86_energy_perf_policy \- Manage Energy vs. Performance Policy via x86 Model Specific Registers
10 .RB "scope: \-\-cpu\ cpu-list | \-\-pkg\ pkg-list"
12 .RB "cpu-list, pkg-list: # | #,# | #-# | all"
14 .RB "field: \-\-all | \-\-epb | \-\-hwp-epp | \-\-hwp-min | \-\-hwp-max | \-\-hwp-desired"
16 .RB "other: (\-\-force | \-\-hwp-enable | \-\-turbo-enable) value)"
18 .RB "value: # | default | performance | balance-performance | balance-power | power"
21 displays and updates energy-performance policy settings specific to
23 updates, no matter if the Linux cpufreq sub-system is enabled or not.
27 such as how aggressively the hardware enters and exits CPU idle states (C-states)
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/linux/Documentation/process/
H A D1.Intro.rst7 -----------------
15 Linux kernel must be made available under a GPL-compatible license.
24 :ref:`development_early_stage` covers early-stage project planning, with an
51 ---------------------------
56 kernel has evolved into a best-of-breed operating system component which
57 runs on pocket-sized digital music players, desktop PCs, the largest
66 capable and well-suited to the task at hand as possible. Distributors and
77 free software projects. A typical three-month kernel development cycle can
85 smoothly (and produce a high-quality product) in an environment where
102 better; the following text should help you - or those who work for you -
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/linux/sound/soc/fsl/
H A Dfsl_micfil.c1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
19 #include <linux/dma/imx-dma.h>
48 enum quality { enum
74 enum quality quality; member
138 .fifo_offset = -4,
142 { .compatible = "fsl,imx8mm-micfil", .data = &fsl_micfil_imx8mm },
143 { .compatible = "fsl,imx8mp-micfil", .data = &fsl_micfil_imx8mp },
144 { .compatible = "fsl,imx93-micfil", .data = &fsl_micfil_imx93 },
145 { .compatible = "fsl,imx943-micfil", .data = &fsl_micfil_imx943 },
151 [QUALITY_HIGH] = "High",
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/linux/drivers/media/test-drivers/vivid/
H A Dvivid-radio-rx.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * vivid-radio-rx.c - radio receiver support functions.
12 #include <linux/v4l2-dv-timings.h>
15 #include <media/v4l2-common.h>
16 #include <media/v4l2-event.h>
17 #include <media/v4l2-dv-timings.h>
19 #include "vivid-core.h"
20 #include "vivid-ctrls.h"
21 #include "vivid-radio-common.h"
22 #include "vivid-rds-gen.h"
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/linux/Documentation/timers/
H A Dhighres.rst2 High resolution timers and dynamic ticks design notes
8 https://www.kernel.org/doc/ols/2006/ols2006v1-pages-333-346.pdf
11 http://www.cs.columbia.edu/~nahum/w6998/papers/ols2006-hrtimers-slides.pdf
23 - hrtimer base infrastructure
24 - timeofday and clock source management
25 - clock event management
26 - high resolution timer functionality
27 - dynamic ticks
31 ---------------------------
40 - time ordered enqueueing into a rb-tree
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/linux/drivers/media/v4l2-core/
H A Dv4l2-ctrls-defs.c1 // SPDX-License-Identifier: GPL-2.0-or-later
5 * Copyright (C) 2010-2021 Hans Verkuil <hverkuil-cisco@xs4all.nl>
9 #include <media/v4l2-ctrls.h>
26 "MPEG-1/2 Layer I", in v4l2_ctrl_get_menu()
27 "MPEG-1/2 Layer II", in v4l2_ctrl_get_menu()
28 "MPEG-1/2 Layer III", in v4l2_ctrl_get_menu()
29 "MPEG-2/4 AAC", in v4l2_ctrl_get_menu()
30 "AC-3", in v4l2_ctrl_get_menu()
128 "16-bit CRC", in v4l2_ctrl_get_menu()
141 "MPEG-1", in v4l2_ctrl_get_menu()
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