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/kernel/linux/linux-5.10/drivers/misc/echo/
Decho.h1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * SpanDSP - a series of DSP components for telephony
5 * echo.c - A line echo canceller. This code is being developed
24 This module aims to provide G.168-2002 compliant echo cancellation, to remove
25 electrical echoes (e.g. from 2-4 wire hybrids) from voice calls.
40 things like modem line equalisers and line echo cancellers. There it works very
42 very poorly for things like speech echo cancellation, where the signal level
43 varies widely. This is quite easy to fix. If the signal level is normalised -
44 similar to applying AGC - LMS can work as well for a signal of varying
47 other algorithms exist - e.g. RLS (essentially the same as Kalman filtering),
[all …]
/kernel/linux/linux-6.6/drivers/misc/echo/
Decho.h1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * SpanDSP - a series of DSP components for telephony
5 * echo.c - A line echo canceller. This code is being developed
24 This module aims to provide G.168-2002 compliant echo cancellation, to remove
25 electrical echoes (e.g. from 2-4 wire hybrids) from voice calls.
40 things like modem line equalisers and line echo cancellers. There it works very
42 very poorly for things like speech echo cancellation, where the signal level
43 varies widely. This is quite easy to fix. If the signal level is normalised -
44 similar to applying AGC - LMS can work as well for a signal of varying
47 other algorithms exist - e.g. RLS (essentially the same as Kalman filtering),
[all …]
/kernel/linux/linux-5.10/Documentation/driver-api/media/drivers/
Dpvrusb2.rst1 .. SPDX-License-Identifier: GPL-2.0
9 ----------
13 Its history started with the reverse-engineering effort by Björn
26 This driver has a strong separation of layers. They are very
29 1. Low level wire-protocol implementation with the device.
34 3. High level hardware driver implementation which coordinates all
38 tear-down, arbitration, and interaction with high level
42 5. High level interfaces which glue the driver to various published
54 right now the V4L high level interface is the most complete, the
55 sysfs high level interface will work equally well for similar
[all …]
/kernel/linux/linux-6.6/Documentation/driver-api/media/drivers/
Dpvrusb2.rst1 .. SPDX-License-Identifier: GPL-2.0
9 ----------
13 Its history started with the reverse-engineering effort by Björn
26 This driver has a strong separation of layers. They are very
29 1. Low level wire-protocol implementation with the device.
34 3. High level hardware driver implementation which coordinates all
38 tear-down, arbitration, and interaction with high level
42 5. High level interfaces which glue the driver to various published
54 right now the V4L high level interface is the most complete, the
55 sysfs high level interface will work equally well for similar
[all …]
/kernel/linux/linux-6.6/Documentation/virt/
Dparavirt_ops.rst1 .. SPDX-License-Identifier: GPL-2.0
13 including native machine -- without any hypervisors.
16 corresponding to low-level critical instructions and high-level
18 time by enabling binary patching of the low-level critical operations
23 - simple indirect call
24 These operations correspond to high-level functionality where it is
25 known that the overhead of indirect call isn't very important.
27 - indirect call which allows optimization with binary patch
28 Usually these operations correspond to low-level critical instructions. They
30 very important.
[all …]
/kernel/linux/linux-5.10/Documentation/virt/
Dparavirt_ops.rst1 .. SPDX-License-Identifier: GPL-2.0
13 including native machine -- without any hypervisors.
16 corresponding to low level critical instructions and high level
17 functionalities in various areas. pv-ops allows for optimizations at run
18 time by enabling binary patching of the low-ops critical operations
23 - simple indirect call
24 These operations correspond to high level functionality where it is
25 known that the overhead of indirect call isn't very important.
27 - indirect call which allows optimization with binary patch
30 very important.
[all …]
/kernel/linux/linux-6.6/lib/fonts/
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
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
95 This is a high resolution console font for machines with very
[all …]
/kernel/linux/linux-5.10/lib/fonts/
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
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
95 This is a high resolution console font for machines with very
[all …]
/kernel/linux/linux-6.6/Documentation/devicetree/bindings/rtc/
Drtc-palmas.txt4 - compatible:
5 - "ti,palmas-rtc" for palma series of the RTC controller
6 - interrupts: Interrupt number of RTC submodule on device.
10 - ti,backup-battery-chargeable: The Palmas series device like TPS65913 or
12 battery is removed or in very low power state. The backup battery
13 can be chargeable or non-chargeable. This flag will tells whether
16 - ti,backup-battery-charge-high-current: Enable high current charging in
18 The high current will be > 100uA. Absence of this property will
25 compatible = "ti,palmas-rtc";
26 interrupt-parent = <&palmas>;
[all …]
/kernel/linux/linux-5.10/Documentation/devicetree/bindings/rtc/
Drtc-palmas.txt4 - compatible:
5 - "ti,palmas-rtc" for palma series of the RTC controller
6 - interrupts: Interrupt number of RTC submodule on device.
10 - ti,backup-battery-chargeable: The Palmas series device like TPS65913 or
12 battery is removed or in very low power state. The backup battery
13 can be chargeable or non-chargeable. This flag will tells whether
16 - ti,backup-battery-charge-high-current: Enable high current charging in
18 The high current will be > 100uA. Absence of this property will
25 compatible = "ti,palmas-rtc";
26 interrupt-parent = <&palmas>;
[all …]
/kernel/linux/linux-6.6/Documentation/timers/
Dhrtimers.rst2 hrtimers - subsystem for high-resolution kernel timers
5 This patch introduces a new subsystem for high-resolution kernel timers.
9 back and forth trying to integrate high-resolution and high-precision
11 such high-resolution timer implementations in practice, we came to the
18 - the forced handling of low-resolution and high-resolution timers in
20 mess. The timers.c code is very "tightly coded" around jiffies and
21 32-bitness assumptions, and has been honed and micro-optimized for a
23 for many years - and thus even small extensions to it easily break
25 code is very good and tight code, there's zero problems with it in its
26 current usage - but it is simply not suitable to be extended for
[all …]
/kernel/linux/linux-5.10/arch/arc/kernel/
Dintc-compact.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2011-12 Synopsys, Inc. (www.synopsys.com)
18 * -Platform independent, needed for each CPU (not foldable into init_IRQ)
19 * -Called very early (start_kernel -> setup_arch -> setup_processor)
22 * -Optionally, setup the High priority Interrupts as Level 2 IRQs
28 /* Is timer high priority Interrupt (Level2 in ARCompact jargon) */ in arc_init_IRQ()
38 pr_info("Level-2 interrupts bitset %x\n", level_mask); in arc_init_IRQ()
54 * ARC700 core includes a simple on-chip intc supporting
55 * -per IRQ enable/disable
56 * -2 levels of interrupts (high/low)
[all …]
/kernel/linux/linux-6.6/arch/arc/kernel/
Dintc-compact.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2011-12 Synopsys, Inc. (www.synopsys.com)
18 * -Platform independent, needed for each CPU (not foldable into init_IRQ)
19 * -Called very early (start_kernel -> setup_arch -> setup_processor)
22 * -Optionally, setup the High priority Interrupts as Level 2 IRQs
28 /* Is timer high priority Interrupt (Level2 in ARCompact jargon) */ in arc_init_IRQ()
38 pr_info("Level-2 interrupts bitset %x\n", level_mask); in arc_init_IRQ()
54 * ARC700 core includes a simple on-chip intc supporting
55 * -per IRQ enable/disable
56 * -2 levels of interrupts (high/low)
[all …]
/kernel/linux/linux-5.10/Documentation/timers/
Dhrtimers.rst2 hrtimers - subsystem for high-resolution kernel timers
5 This patch introduces a new subsystem for high-resolution kernel timers.
9 back and forth trying to integrate high-resolution and high-precision
11 such high-resolution timer implementations in practice, we came to the
18 - the forced handling of low-resolution and high-resolution timers in
20 mess. The timers.c code is very "tightly coded" around jiffies and
21 32-bitness assumptions, and has been honed and micro-optimized for a
23 for many years - and thus even small extensions to it easily break
25 code is very good and tight code, there's zero problems with it in its
26 current usage - but it is simply not suitable to be extended for
[all …]
/kernel/linux/linux-5.10/Documentation/admin-guide/media/
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 -------------------------------
24 SI476x allow user to get multiple characteristics that can be very
26 very little to do with V4L2 subsystem. Such parameters are exposed via
31 * /sys/kernel/debug/<device-name>/acf
52 0x05 smute 0 - Audio is not soft muted
53 1 - Audio is soft muted
[all …]
/kernel/linux/linux-6.6/Documentation/admin-guide/media/
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 -------------------------------
24 SI476x allow user to get multiple characteristics that can be very
26 very little to do with V4L2 subsystem. Such parameters are exposed via
31 * /sys/kernel/debug/<device-name>/acf
52 0x05 smute 0 - Audio is not soft muted
53 1 - Audio is soft muted
[all …]
/kernel/linux/linux-5.10/Documentation/vm/
Dzsmalloc.rst9 never attempts higher order page allocation which is very likely to
11 (0-order) pages, it would suffer from very high fragmentation --
15 To overcome these issues, zsmalloc allocates a bunch of 0-order pages
17 pages act as a single higher-order page i.e. an object can span 0-order
23 worst case, page is incompressible and is thus stored "as-is" i.e. in
31 issues on 32-bit systems where the VA region for kernel space mappings
32 is very small. So, before using the allocating memory, the object has to
70 the number of 0-order pages to make a zspage
/kernel/linux/linux-6.6/net/mac80211/
DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
66 over (possibly multi-hop) wireless links to form a single logical
138 debugging messages for the managed-mode MLME. It
157 This option enables 802.11n High Throughput features
170 very verbose OCB debugging messages. It should not
181 very verbose IBSS debugging messages. It should not
191 Selecting this option causes mac80211 to print out very
204 Selecting this option causes mac80211 to print out very
217 Selecting this option causes mac80211 to print out very
230 Selecting this option causes mac80211 to print out very
[all …]
/kernel/linux/linux-5.10/net/mac80211/
DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
66 over (possibly multi-hop) wireless links to form a single logical
138 debugging messages for the managed-mode MLME. It
157 This option enables 802.11n High Throughput features
170 very verbose OCB debugging messages. It should not
181 very verbose IBSS debugging messages. It should not
191 Selecting this option causes mac80211 to print out very
204 Selecting this option causes mac80211 to print out very
217 Selecting this option causes mac80211 to print out very
230 Selecting this option causes mac80211 to print out very
[all …]
/kernel/linux/linux-5.10/drivers/video/fbdev/omap2/omapfb/dss/
DKconfig1 # SPDX-License-Identifier: GPL-2.0
46 OMAP Video Encoder support for S-Video and composite TV-out.
62 HDMI Interface for OMAP5 and similar cores. This adds the High
71 SDI is a high speed one-way display serial bus between the host
79 DSI is a high speed half-duplex serial interface between the host
100 is very high.
/kernel/linux/linux-6.6/drivers/video/fbdev/omap2/omapfb/dss/
DKconfig1 # SPDX-License-Identifier: GPL-2.0
46 OMAP Video Encoder support for S-Video and composite TV-out.
62 HDMI Interface for OMAP5 and similar cores. This adds the High
71 SDI is a high speed one-way display serial bus between the host
79 DSI is a high speed half-duplex serial interface between the host
100 is very high.
/kernel/linux/linux-6.6/Documentation/admin-guide/
Drtc.rst8 the local time zone or daylight savings time -- unless they dual boot
9 with MS-Windows -- but will instead be set to Coordinated Universal Time
12 The newest non-PC hardware tends to just count seconds, like the time(2)
13 system call reports, but RTCs also very commonly represent time using
16 Linux has two largely-compatible userspace RTC API families you may
20 so it's not very portable to non-x86 systems.
35 Old PC/AT-Compatible driver: /dev/rtc
36 --------------------------------------
44 a few ways (enabling longer alarm periods, and wake-from-hibernate).
59 the type of interrupt (update-done, alarm-rang, or periodic) that was
[all …]
/kernel/linux/linux-5.10/Documentation/admin-guide/
Drtc.rst8 the local time zone or daylight savings time -- unless they dual boot
9 with MS-Windows -- but will instead be set to Coordinated Universal Time
12 The newest non-PC hardware tends to just count seconds, like the time(2)
13 system call reports, but RTCs also very commonly represent time using
16 Linux has two largely-compatible userspace RTC API families you may
20 so it's not very portable to non-x86 systems.
35 Old PC/AT-Compatible driver: /dev/rtc
36 --------------------------------------
44 a few ways (enabling longer alarm periods, and wake-from-hibernate).
59 the type of interrupt (update-done, alarm-rang, or periodic) that was
[all …]
/kernel/linux/linux-5.10/drivers/gpu/drm/omapdrm/dss/
DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
57 OMAP Video Encoder support for S-Video and composite TV-out.
82 HDMI Interface for OMAP5 and similar cores. This adds the High
92 SDI is a high speed one-way display serial bus between the host
101 DSI is a high speed half-duplex serial interface between the host
122 is very high.
/kernel/linux/linux-6.6/arch/powerpc/include/asm/vdso/
Dprocessor.h1 /* SPDX-License-Identifier: GPL-2.0-only */
7 /* Macros for adjusting thread priority (hardware multi-threading) */
9 #define HMT_very_low() asm volatile("or 31, 31, 31 # very low priority")
13 #define HMT_medium_high() asm volatile("or 5, 5, 5 # medium high priority")
14 #define HMT_high() asm volatile("or 3, 3, 3 # high priority")
27 /* Pre-POWER10 uses low ; medium priority nops */ \

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