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/Documentation/sound/soc/
Ddapm.rst2 Dynamic Audio Power Management for Portable Devices
8 Dynamic Audio Power Management (DAPM) is designed to allow portable
9 Linux devices to use the minimum amount of power within the audio
11 management frameworks and, as such, can easily co-exist with them.
16 switching decisions based upon any audio stream (capture/playback)
17 activity and audio mixer settings within the device.
19 DAPM is based on two basic elements, called widgets and routes:
21 * a **widget** is every part of the audio hardware that can be enabled by
23 * a **route** is an interconnection between widgets that exists when sound
27 audio routing graph. This graph is specific to each sound card and spans
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Ddpcm.rst8 Dynamic PCM allows an ALSA PCM device to digitally route its PCM audio to
10 digital audio to I2S DAI0, I2S DAI1 or PDM DAI2. This is useful for on SoC DSP
15 graph representing the DSP internal audio paths and uses the mixer settings to
18 DPCM re-uses all the existing component codec, platform and DAI drivers without
22 Phone Audio System with SoC based DSP
23 -------------------------------------
25 Consider the following phone audio subsystem. This will be used in this
26 document for all examples :-
29 | Front End PCMs | SoC DSP | Back End DAIs | Audio devices |
32 PCM0 <------------> * * <----DAI0-----> Codec Headset
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/Documentation/devicetree/bindings/sound/
Dwidgets.txt1 Widgets:
3 This mainly specifies audio off-codec DAPM widgets.
7 "template-wname", "user-supplied-wname"
9 The "template-wname" being the template widget name and currently includes:
12 The "user-supplied-wname" being the user specified widget name.
15 simple-audio-widgets =
Dsound-card-common.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/sound/sound-card-common.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Mark Brown <broonie@kernel.org>
13 audio-routing:
14 $ref: /schemas/types.yaml#/definitions/non-unique-string-array
16 A list of the connections between audio components. Each entry is a
20 ignore-suspend-widgets:
21 $ref: /schemas/types.yaml#/definitions/non-unique-string-array
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Daudio-graph.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/sound/audio-graph.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Audio Graph
10 - Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
13 - $ref: /schemas/sound/dai-params.yaml#
17 $ref: /schemas/types.yaml#/definitions/phandle-array
25 A list of the connections between audio components.
28 $ref: /schemas/types.yaml#/definitions/non-unique-string-array
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Dsamsung,odroid.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Samsung Exynos Odroid XU3/XU4 audio complex with MAX98090 codec
10 - Krzysztof Kozlowski <krzk@kernel.org>
11 - Sylwester Nawrocki <s.nawrocki@samsung.com>
14 - $ref: sound-card-common.yaml#
19 - const: hardkernel,odroid-xu3-audio
21 - const: hardkernel,odroid-xu4-audio
24 - const: samsung,odroid-xu3-audio
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Dqcom,apq8016-sbc-sndcard.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
4 $id: http://devicetree.org/schemas/sound/qcom,apq8016-sbc-sndcard.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
11 - Stephan Gerhold <stephan@gerhold.net>
16 - qcom,apq8016-sbc-sndcard
17 - qcom,msm8916-qdsp6-sndcard
21 - description: Microphone I/O mux register address
22 - description: Speaker I/O mux register address
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Dsimple-card.yaml1 # 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#
7 title: Simple Audio Card Driver
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
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Damlogic,axg-sound-card.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/sound/amlogic,axg-sound-card.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jerome Brunet <jbrunet@baylibre.com>
13 - $ref: sound-card-common.yaml#
17 const: amlogic,axg-sound-card
19 audio-aux-devs:
20 $ref: /schemas/types.yaml#/definitions/phandle-array
23 audio-widgets:
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Daudio-iio-aux.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/sound/audio-iio-aux.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Audio IIO auxiliary
10 - Herve Codina <herve.codina@bootlin.com>
16 - $ref: dai-common.yaml#
20 const: audio-iio-aux
22 io-channels:
26 io-channel-names:
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Dmediatek,mt8188-mt6359.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/sound/mediatek,mt8188-mt6359.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Trevor Wu <trevor.wu@mediatek.com>
13 - $ref: sound-card-common.yaml#
18 - mediatek,mt8188-es8326
19 - mediatek,mt8188-mt6359-evb
20 - mediatek,mt8188-nau8825
21 - mediatek,mt8188-rt5682s
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Damlogic,gx-sound-card.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/sound/amlogic,gx-sound-card.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jerome Brunet <jbrunet@baylibre.com>
13 - $ref: sound-card-common.yaml#
18 - const: amlogic,gx-sound-card
20 audio-aux-devs:
21 $ref: /schemas/types.yaml#/definitions/phandle-array
24 audio-widgets:
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Dmt8192-mt6359-rt1015-rt5682.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/sound/mt8192-mt6359-rt1015-rt5682.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jiaxin Yu <jiaxin.yu@mediatek.com>
11 - Shane Chien <shane.chien@mediatek.com>
17 - $ref: sound-card-common.yaml#
22 - mediatek,mt8192_mt6359_rt1015_rt5682
23 - mediatek,mt8192_mt6359_rt1015p_rt5682
24 - mediatek,mt8192_mt6359_rt1015p_rt5682s
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Dmt8195-mt6359.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/sound/mt8195-mt6359.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Trevor Wu <trevor.wu@mediatek.com>
16 - $ref: sound-card-common.yaml#
21 - mediatek,mt8195_mt6359_rt1019_rt5682
22 - mediatek,mt8195_mt6359_rt1011_rt5682
23 - mediatek,mt8195_mt6359_max98390_rt5682
27 description: User specified audio sound card name
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Dmt8186-mt6366-da7219-max98357.yaml1 # 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
26 A list of the connections between audio components. Each entry is a
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Dmt8186-mt6366-rt1019-rt5682s.yaml1 # 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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/Documentation/sound/hd-audio/
Drealtek-pc-beep.rst7 route audio between pins but aren't themselves exposed as HDA widgets. As far
9 for codecs that don't have mixer widgets in their output paths. Why it's easier
20 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
24 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
35 by h and S bits. Does not affect the level of 1Ah exposed to other widgets.
39 by h and S bits. Does not affect the level of 1Ah exposed to other widgets.
58 +--DIV--+--!DIV--+ {1Ah boost control}
60 +--(b == 0)--+--(b != 0)--+
70 +-----!h-----+-----S-----+
79 All Realtek HDA codecs have a vendor-defined widget with node ID 20h which
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Dcontrols.rst2 HD-Audio Codec-Specific Mixer Controls
6 This file explains the codec-specific mixer controls.
9 --------------
12 This is an enum control to change the surround-channel setup,
16 jack-retasking of multi-I/O jacks.
18 Auto-Mute Mode
19 This is an enum control to change the auto-mute behavior of the
20 headphone and line-out jacks. If built-in speakers and headphone
21 and/or line-out jacks are available on a machine, this controls
23 When there are only either headphones or line-out jacks, it gives
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Dnotes.rst2 More Notes on HD-Audio Driver
11 HD-audio is the new standard on-board audio component on modern PCs
12 after AC97. Although Linux has been supporting HD-audio since long
15 This document explains the brief trouble-shooting and debugging
16 methods for the HD-audio hardware.
18 The HD-audio component consists of two parts: the controller chip and
19 the codec chips on the HD-audio bus. Linux provides a single driver
20 for all controllers, snd-hda-intel. Although the driver name contains
21 a word of a well-known hardware vendor, it's not specific to it but for
22 all controller chips by other companies. Since the HD-audio
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