| /Documentation/sound/cards/ |
| D | cmipci.rst | 2 Brief Notes on C-Media 8338/8738/8768/8770 Driver
8 Front/Rear Multi-channel Playback
9 ---------------------------------
13 DACs, both streams are handled independently unlike the 4/6ch multi-
18 (hw:0,1) is assigned to the second DAC for rear playback.
22 - The first DAC supports U8 and S16LE formats, while the second DAC
23 supports only S16LE.
24 - The second DAC supports only two channel stereo.
26 Please note that the CM8x38 DAC doesn't support continuous playback
27 rate but only fixed rates: 5512, 8000, 11025, 16000, 22050, 32000,
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| D | emu-mixer.rst | 2 E-MU Digital Audio System mixer / default DSP code
5 This document covers the E-MU 0404/1010/1212/1616/1820 PCI/PCI-e/CardBus
9 alternative front-end geared towards semi-professional studio recording.
11 This document is based on audigy-mixer.rst.
20 This is the case on more modern motherboards, where the PCI bus is only a
22 In particular, I got recording glitches during simultaneous playback on an
33 This driver supports only 16-bit 44.1/48 kHz operation. The multi-channel
34 device (see emu10k1-jack.rst) additionally supports 24-bit capture.
37 <https://github.com/ossilator/linux/tree/ossis-emu10k1>`_.
38 Its multi-channel device supports 24-bit for both playback and capture,
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| D | audigy-mixer.rst | 5 This is based on sb-live-mixer.rst.
20 functionality. Only the default built-in code in the ALSA driver is described
34 one-way three wire serial bus for digital sound by Philips Semiconductors
42 FX-bus
47 name='PCM Front Playback Volume',index=0
48 ----------------------------------------
49 This control is used to attenuate samples from left and right front PCM FX-bus
51 samples for 5.1 playback. The result samples are forwarded to the front speakers.
53 name='PCM Surround Playback Volume',index=0
54 -------------------------------------------
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| D | mixart.rst | 13 The miXart8AES/EBU is the same with a add-on card that offers further
15 Furthermore the add-on card offers external clock synchronisation
23 Use the mixartloader that can be found in the alsa-tools package.
30 stereo analog capture 'pcm0c' and 1 stereo analog playback 'pcm0p' device.
35 -------
37 Sample rates : 8000 - 48000 Hz continuously
39 Playback section in VERSION 0.1.0
40 --------
41 For instance the playback devices are configured to have max. 4
48 -------
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| D | sb-live-mixer.rst | 19 (index 0) for a given card) allows to forward 48kHz, stereo, 16-bit
22 to 8 raw PCM devices operating at 48kHz, 16-bit little endian. It would
24 but the conversion routines exist only for stereo (2-channel streams)
34 functionality. Only the default built-in code in the ALSA driver is described
48 one-way three wire serial bus for digital sound by Philips Semiconductors
56 FX-bus
62 ``name='Wave Playback Volume',index=0``
63 ---------------------------------------
64 This control is used to attenuate samples from left and right PCM FX-bus
68 ``name='Wave Surround Playback Volume',index=0``
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| D | audiophile-usb.rst | 2 Guide to using M-Audio Audiophile USB with ALSA and Jack
9 This document is a guide to using the M-Audio Audiophile USB (tm) device with
15 * v1.4 - Thibault Le Meur (2007-07-11)
17 - Added Low Endianness nature of 16bits-modes
19 - Modifying document structure
21 * v1.5 - Thibault Le Meur (2007-07-12)
22 - Added AC3/DTS passthru info
35 - This port supports 2 pairs of line-level audio inputs (1/4" TS and RCA)
36 - When the 1/4" TS (jack) connectors are connected, the RCA connectors
57 * 16-bit/48kHz ==> 4 channels in + 4 channels out
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| D | hdspm.rst | 2 Software Interface ALSA-DSP MADI Driver
5 (translated from German, so no good English ;-),
7 2004 - winfried ritsch
11 the Controls and startup-options are ALSA-Standard and only the
19 ------------------
21 * number of channels -- depends on transmission mode
24 use for a lower number of channels is only resource allocation,
27 scaled. (Only important for low performance boards).
29 * Single Speed -- 1..64 channels
33 receiver, only 56 are transmitted/received over the MADI, but
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| /Documentation/sound/designs/ |
| D | timestamping.rst | 7 - Trigger_tstamp is the system time snapshot taken when the .trigger
10 capabilities or conversely may only be able to provide a correct
11 estimate with a delay. In the latter two cases, the low-level driver
17 - tstamp is the current system timestamp updated during the last
19 The difference (tstamp - trigger_tstamp) defines the elapsed time.
29 - ``avail`` reports how much can be written in the ring buffer
30 - ``delay`` reports the time it will take to hear a new sample after all
43 ascii-art, this could be represented as follows (for the playback
47 --------------------------------------------------------------> time
53 |< codec delay >|<--hw delay-->|<queued samples>|<---avail->|
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| D | oss-emulation.rst | 2 Notes on Kernel OSS-Emulation
13 as add-on kernel modules, snd-pcm-oss, snd-mixer-oss and snd-seq-oss.
18 is called. The alias is defined ``sound-service-x-y``, where x and y are
22 Only necessary step for auto-loading of OSS modules is to define the
25 alias sound-slot-0 snd-emu10k1
27 As the second card, define ``sound-slot-1`` as well.
29 ``alias sound-slot-0 snd-card-0`` doesn't work any more like the old
37 Please note that the devices listed in this proc file appear only
38 after the corresponding OSS-emulation module is loaded. Don't worry
71 /dev/dsp2, but only /dev/dsp0 and /dev/adsp0.
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| D | control-names.rst | 8 ---------------
16 Playback one direction
18 Bypass Playback one direction
68 Headset Mic mic part of combined headset jack - 4-pin
70 Headphone Mic mic part of either/or - 3-pin headphone or mic
71 Line input only, use "Line Out" for output
79 Analog Loopback D/A -> A/D loopback
80 Digital Loopback playback -> capture loopback -
91 SPDIF output only
98 -----------------------
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| /Documentation/devicetree/bindings/sound/ |
| D | fsl,ssi.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Shengjiu Wang <shengjiu.wang@nxp.com>
13 Notes on fsl,playback-dma and fsl,capture-dma
14 On SOCs that have an SSI, specific DMA channels are hard-wired for playback
16 playback and DMA channel 1 for capture. SSI2 must use DMA channel 2 for
17 playback and DMA channel 3 for capture. The developer can choose which
18 DMA controller to use, but the channels themselves are hard-wired. The
22 "fsl,playback-dma" and "fsl,capture-dma" must be marked as compatible with
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| D | samsung-i2s.yaml | 1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/sound/samsung-i2s.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Krzysztof Kozlowski <krzk@kernel.org>
11 - Sylwester Nawrocki <s.nawrocki@samsung.com>
14 - $ref: dai-common.yaml#
19 samsung,s3c6410-i2s: for 8/16/24bit stereo I2S.
21 samsung,s5pv210-i2s: for 8/16/24bit multichannel (5.1) I2S with
25 samsung,exynos5420-i2s: for 8/16/24bit multichannel (5.1) I2S for
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| D | simple-card.yaml | 1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/sound/simple-card.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
14 frame-master:
15 description: Indicates dai-link frame master.
18 bitclock-master:
19 description: Indicates dai-link bit clock master
22 frame-inversion:
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| D | google,sc7280-herobrine.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/sound/google,sc7280-herobrine.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Google SC7280-Herobrine ASoC sound card driver
10 - Judy Hsiao <judyhsiao@chromium.org>
16 - $ref: sound-card-common.yaml#
21 - google,sc7280-herobrine
23 "#address-cells":
26 "#size-cells":
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| D | mt8186-mt6366-da7219-max98357.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/sound/mt8186-mt6366-da7219-max98357.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jiaxin Yu <jiaxin.yu@mediatek.com>
16 - $ref: sound-card-common.yaml#
21 - mediatek,mt8186-mt6366-da7219-max98357-sound
23 audio-routing:
24 $ref: /schemas/types.yaml#/definitions/non-unique-string-array
35 - HDMI1
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| D | mt8186-mt6366-rt1019-rt5682s.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/sound/mt8186-mt6366-rt1019-rt5682s.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jiaxin Yu <jiaxin.yu@mediatek.com>
16 - $ref: sound-card-common.yaml#
21 - mediatek,mt8186-mt6366-rt1019-rt5682s-sound
22 - mediatek,mt8186-mt6366-rt5682s-max98360-sound
23 - mediatek,mt8186-mt6366-rt5650-sound
25 audio-routing:
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| D | audio-graph-port.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/sound/audio-graph-port.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
15 port-base:
17 - $ref: /schemas/graph.yaml#/$defs/port-base
18 - $ref: /schemas/sound/dai-params.yaml#
20 mclk-fs:
21 $ref: simple-card.yaml#/definitions/mclk-fs
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| D | tas5720.txt | 3 The TAS5720 serial control bus communicates through the I2C protocol only. The
5 audio playback. For more product information please see the links below:
9 https://www.ti.com/product/TAS5720A-Q1
14 - compatible : "ti,tas5720",
15 "ti,tas5720a-q1",
17 - reg : I2C slave address
18 - dvdd-supply : phandle to a 3.3-V supply for the digital circuitry
19 - pvdd-supply : phandle to a supply used for the Class-D amp and the analog
26 dvdd-supply = <&vdd_3v3_reg>;
27 pvdd-supply = <&_supply_reg>;
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| /Documentation/userspace-api/media/v4l/ |
| D | vidioc-decoder-cmd.rst | 1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 VIDIOC_DECODER_CMD - VIDIOC_TRY_DECODER_CMD - Execute an decoder command
38 These ioctls control an audio/video (usually MPEG-) decoder.
68 .. flat-table:: struct v4l2_decoder_cmd
69 :header-rows: 0
70 :stub-columns: 0
73 * - __u32
74 - ``cmd``
75 -
76 - The decoder command, see :ref:`decoder-cmds`.
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| /Documentation/sound/soc/ |
| D | codec-to-codec.rst | 9 --------- ---------
11 CPU -------> codec
13 --------- ---------
18 ---------
20 codec-2
22 ---------
24 dai-2
26 ---------- ---------
27 | | dai-1 | |
28 CPU -------> codec-1
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| D | dapm.rst | 11 management frameworks and, as such, can easily co-exist with them.
16 switching decisions based upon any audio stream (capture/playback)
32 The graph for the STM32MP1-DK1 sound card is shown in picture:
34 .. kernel-figure:: dapm-graph.svg
65 Enabled and disabled when stream playback/capture is started and
77 An analog switch that outputs only one of many inputs.
139 (Widgets are defined in include/sound/soc-dapm.h)
142 There are convenience macros defined in soc-dapm.h that can be used to quickly
150 ---------------------
152 Stream Widgets relate to the stream power domain and only consist of ADCs
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| /Documentation/devicetree/bindings/dma/ |
| D | loongson,ls1b-apbdma.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/dma/loongson,ls1b-apbdma.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Loongson-1 APB DMA Controller
10 - Keguang Zhang <keguang.zhang@gmail.com>
13 Loongson-1 APB DMA controller provides 3 independent channels for
14 peripherals such as NAND, audio playback and capture.
19 - const: loongson,ls1b-apbdma
20 - items:
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| /Documentation/gpu/amdgpu/display/ |
| D | mpo-overview.rst | 6 'Documentation/gpu/amdgpu/display/dcn-overview.rst'.
10 fixed-function hardware in the display controller rather than using graphics or
12 the graphics/compute pipelines can be put into low-power states. In summary,
15 * Decreased GPU and CPU workload - no composition shaders needed, no extra
17 * Plane independent page flips - No need to be tied to global compositor
18 page-flip present rate, reduced latency, independent timing.
20 .. note:: Keep in mind that MPO is all about power-saving; if you want to learn
21 more about power-save in the display context, check the link:
22 `Power <https://gitlab.freedesktop.org/pq/color-and-hdr/-/blob/main/doc/power.rst>`__.
24 Multiplane Overlay is only available using the DRM atomic model. The atomic
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| /Documentation/usb/ |
| D | gadget-testing.rst | 38 Function-specific configfs interface
39 ------------------------------------
46 The attribute is read-only.
52 ------------------------
77 Function-specific configfs interface
78 ------------------------------------
100 ------------------------
117 Function-specific configfs interface
118 ------------------------------------
140 -------------------------------
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| /Documentation/userspace-api/media/cec/ |
| D | cec-ioc-adap-g-log-addrs.rst | 1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
15 CEC_ADAP_G_LOG_ADDRS, CEC_ADAP_S_LOG_ADDRS - Get or set the logical addresses
47 is only available if ``CEC_CAP_LOG_ADDRS`` is set (the ``ENOTTY`` error code is
49 can only be called by a file descriptor in initiator mode (see :ref:`CEC_S_MODE`), if not
59 addresses have been claimed. If the file descriptor is in non-blocking mode then it will
62 A :ref:`CEC_EVENT_STATE_CHANGE <CEC-EVENT-STATE-CHANGE>` event is sent when the
74 .. flat-table:: struct cec_log_addrs
75 :header-rows: 0
76 :stub-columns: 0
79 * - __u8
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