| /linux/Documentation/sound/cards/ |
| H A D | cmipci.rst | 2 Brief Notes on C-Media 8338/8738/8768/8770 Driver
8 Front/Rear Multi-channel Playback
9 ---------------------------------
12 channels can be used for front/rear playbacks. Since there are two
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
24 - The second DAC supports only two channel stereo.
26 Please note that the CM8x38 DAC doesn't support continuous playback
44 on and "double DAC" mode. Actually I could hear separate 4 channels
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| H A 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.
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,
62 FX-bus
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| H A 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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| H A 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
23 The number of channels chosen is from 1..Nmax. The reason to
24 use for a lower number of channels is only resource allocation,
25 since unused DMA channels are disabled and less memory is
29 * Single Speed -- 1..64 channels
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| /linux/sound/soc/renesas/ |
| H A D | rz-ssi.c | 1 // SPDX-License-Identifier: GPL-2.0
3 // Renesas RZ/G2L ASoC Serial Sound Interface (SSIF-2) Driver
75 #define SSI_RATES SNDRV_PCM_RATE_8000_48000 /* 8k-48kHz */
117 * The SSI supports full-duplex transmission and reception.
120 * So it is better to use as half-duplex (playing and recording
121 * should be done on separate channels).
123 struct rz_ssi_stream playback; member
138 unsigned int channels; member
250 rz_ssi_clk_setup(struct rz_ssi_priv * ssi,unsigned int rate,unsigned int channels) rz_ssi_clk_setup() argument
926 rz_ssi_is_valid_hw_params(struct rz_ssi_priv * ssi,unsigned int rate,unsigned int channels,unsigned int sample_width,unsigned int sample_bits) rz_ssi_is_valid_hw_params() argument
940 rz_ssi_cache_hw_params(struct rz_ssi_priv * ssi,unsigned int rate,unsigned int channels,unsigned int sample_width,unsigned int sample_bits) rz_ssi_cache_hw_params() argument
958 unsigned int channels = params_channels(params); rz_ssi_dai_hw_params() local
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| /linux/Documentation/ABI/testing/ |
| H A D | configfs-usb-gadget-uac1 | 1 What: /config/usb-gadget/gadget/functions/uac1.name
9 c_srate list of capture sampling rates (comma-separated)
19 p_chmask playback channel mask
20 p_srate list of playback sampling rates (comma-separated)
21 p_ssize playback sample size (bytes)
22 p_mute_present playback mute control enable
23 p_volume_present playback volume control enable
24 p_volume_min playback volume control min value
26 p_volume_max playback volume control max value
28 p_volume_res playback volume control resolution
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| /linux/sound/soc/amd/ |
| H A D | acp.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
13 /* Playback and Capture Offset for Stoney */
26 * playback and SRAM Bank 2 for capture where as in case of BT I2S
27 * Instance, Stoney uses SRAM Bank 3 for playback & SRAM Bank 4 will
29 * 1, 2, 3, 4 will be used for playback & SRAM Banks 5, 6, 7, 8 will be used
73 /* Playback DMA channels */
77 /* Capture DMA channels */
81 /* Playback DMA Channels for I2S BT instance */
85 /* Capture DMA Channels for I2S BT Instance */
89 /* Playback DMA channels for I2S MICSP instance */
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| /linux/Documentation/devicetree/bindings/sound/ |
| H A D | rockchip-i2s.yaml | 1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/sound/rockchip-i2s.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 The I2S bus (Inter-IC sound bus) is a serial link for digital
14 - Heiko Stuebner <heiko@sntech.de>
17 - $ref: dai-common.yaml#
22 - const: rockchip,rk3066-i2s
23 - items:
24 - enum:
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| H A 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
21 The device tree nodes for the DMA channels that are referenced by
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| /linux/drivers/usb/gadget/function/ |
| H A D | u_uac1_legacy.c | 1 // SPDX-License-Identifier: GPL-2.0+
3 * u_uac1.c -- ALSA audio utilities for Gadget stack
24 /*-------------------------------------------------------------------------*/
47 changed = -EINVAL; in _snd_pcm_hw_param_set()
53 val--; in _snd_pcm_hw_param_set()
60 changed = -EINVAL; in _snd_pcm_hw_param_set()
71 t.min = val - 1; in _snd_pcm_hw_param_set()
80 return -EINVAL; in _snd_pcm_hw_param_set()
82 params->cmask |= 1 << var; in _snd_pcm_hw_param_set()
83 params->rmask |= 1 << var; in _snd_pcm_hw_param_set()
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| /linux/sound/soc/xilinx/ |
| H A D | xlnx_i2s.c | 1 // SPDX-License-Identifier: GPL-2.0
32 u32 channels; member
44 return -EINVAL; in xlnx_i2s_set_sclkout_div()
46 drv_data->sysclk = 0; in xlnx_i2s_set_sclkout_div()
48 writel(div, drv_data->base + I2S_I2STIM_OFFSET); in xlnx_i2s_set_sclkout_div()
58 drv_data->sysclk = freq; in xlnx_i2s_set_sysclk()
62 if (drv_data->is_32bit_lrclk) in xlnx_i2s_set_sysclk()
65 bits_per_sample = drv_data->data_width; in xlnx_i2s_set_sysclk()
67 drv_data->ratnum.num = freq / (bits_per_sample * drv_data->channels) / 2; in xlnx_i2s_set_sysclk()
68 drv_data->ratnum.den_step = 1; in xlnx_i2s_set_sysclk()
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| /linux/sound/soc/mediatek/mt8195/ |
| H A D | mt8195-dai-etdm.c | 1 // SPDX-License-Identifier: GPL-2.0
14 #include "mt8195-afe-clk.h"
15 #include "mt8195-afe-common.h"
16 #include "mt8195-reg.h"
117 int cowork_slv_id[MT8195_AFE_IO_ETDM_NUM - 1]; //dai_id
180 return -EINVAL; in get_etdm_fs_timing()
183 static unsigned int get_etdm_ch_fixup(unsigned int channels) in get_etdm_ch_fixup() argument
185 if (channels > 16) in get_etdm_ch_fixup()
187 else if (channels > 8) in get_etdm_ch_fixup()
189 else if (channels > 4) in get_etdm_ch_fixup()
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| /linux/sound/soc/codecs/ |
| H A D | hdmi-codec.c | 1 // SPDX-License-Identifier: GPL-2.0-only
4 * Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/
16 #include <sound/hdmi-codec.h>
22 #define HDMI_CODEC_CHMAP_IDX_UNKNOWN -1
60 { .channels = 2,
65 /* Channel maps for multi-channel playbacks, up to 8 n_ch */
67 { .channels = 2, /* CA_ID 0x00 */
69 { .channels = 4, /* CA_ID 0x01 */
72 { .channels = 4, /* CA_ID 0x02 */
75 { .channels = 4, /* CA_ID 0x03 */
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| H A D | ad193x.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
30 * AD193X volume/mute/de-emphasis etc. controls
37 static const DECLARE_TLV_DB_MINMAX(adau193x_tlv, -9563, 0);
67 /* DAC de-emphasis */
68 SOC_ENUM("Playback Deemphasis", ad193x_deemp_enum),
78 /* ADC high-pass filter */
84 SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
105 struct snd_soc_component *component = snd_soc_dapm_to_component(source->dapm); in ad193x_check_pll()
108 return !!ad193x->sysclk; in ad193x_check_pll()
131 switch (ad193x->type) { in ad193x_has_adc()
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| /linux/Documentation/sound/designs/ |
| H A D | control-names.rst | 8 ---------------
16 Playback one direction
18 Bypass Playback one direction
33 <nothing> channel independent, or applies to all channels
34 Front front left/right channels
36 CLFE C/LFE channels
68 Headset Mic mic part of combined headset jack - 4-pin
70 Headphone Mic mic part of either/or - 3-pin headphone or mic
79 Analog Loopback D/A -> A/D loopback
80 Digital Loopback playback -> capture loopback -
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| H A 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
38 after the corresponding OSS-emulation module is loaded. Don't worry
79 snd-pcm-oss and snd-rawmidi. In the case of PCM, the following
80 options are available for snd-pcm-oss:
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| /linux/sound/isa/gus/ |
| H A D | gusmax.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
25 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
32 static int joystick_dac[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 29};
33 /* 0 to 31, (0.59V-4.52V or 0.389V-2.98V) */
34 static int channels[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 24}; variable
35 static int pcm_channels[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
52 MODULE_PARM_DESC(joystick_dac, "Joystick DAC level 0.59V-4.52V or 0.389V-2.98V for GUS MAX driver."…
53 module_param_array(channels, int, NULL, 0444);
54 MODULE_PARM_DESC(channels, "Used GF1 channels for GUS MAX driver.");
56 MODULE_PARM_DESC(pcm_channels, "Reserved PCM channels for GUS MAX driver.");
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| /linux/sound/usb/misc/ |
| H A D | ua101.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * Edirol UA-101/UA-1000 driver
19 MODULE_DESCRIPTION("Edirol UA-101/1000 driver");
32 * This magic value optimizes memory usage efficiency for the UA-101's packet
55 __stringify(MIN_QUEUE_LENGTH)"-"__stringify(MAX_QUEUE_LENGTH));
92 /* FIFO to synchronize playback rat
105 unsigned int channels; global() member
121 } capture, playback; global() member
616 set_stream_hw(struct ua101 * ua,struct snd_pcm_substream * substream,unsigned int channels) set_stream_hw() argument
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| /linux/sound/usb/ |
| H A D | quirks-table.h | 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
72 #define QUIRK_COMPOSITE_END { .ifnum = -1 }
127 /* Creative BT-D1 */
132 .channels = 2,
146 /* E-Mu 0202 USB */
148 /* E-Mu 0404 USB */
150 /* E-Mu Tracker Pre */
152 /* E-Mu 0204 USB */
171 .channels = 2,
203 /* Playback */
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| /linux/sound/firewire/dice/ |
| H A D | dice-pcm.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * dice_pcm.c - a part of driver for DICE based devices
6 * Copyright (c) 2014 Takashi Sakamoto <o-takashi@sakamocchi.jp>
14 struct snd_pcm_substream *substream = rule->private; in dice_rate_constraint()
15 struct snd_dice *dice = substream->private_data; in dice_rate_constraint()
16 unsigned int index = substream->pcm->devic in dice_rate_constraint()
60 struct snd_interval channels = { dice_channels_constraint() local
106 unsigned int rate, channels; limit_channels_and_rates() local
426 unsigned int capture, playback; snd_dice_create_pcm() local
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| /linux/arch/arm64/boot/dts/renesas/ |
| H A D | ulcb-kf-simple-audio-card-mix+split.dtsi | 1 // SPDX-License-Identifier: GPL-2.0
12 * (A) CPU0 (2ch) <----> (2ch) (X) ak4613 (MIX-0)
13 * (B) CPU1 (2ch) --/ (MIX-1)
14 * (C) CPU3 (2ch) ----> (8ch) (Y) PCM3168A-p (TDM-0 : 0,1ch)
15 * (D) CPU2 (2ch) --/ (TDM-1 : 2,3ch)
16 * (E) CPU4 (2ch) --/ (TDM-2 : 4,5ch)
17 * (F) CPU5 (2ch) --/ (TDM-3 : 6,7ch)
18 * (G) CPU6 (2ch) <---- (6ch) (Z) PCM3168A-c (TDM-a: 0,1ch)
19 * (H) CPU7 (2ch) <--/ (TDM-b: 2,3ch)
20 * (I) CPU8 (2ch) <--/ (TDM-c: 4,5ch)
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| /linux/sound/soc/tegra/ |
| H A D | tegra210_i2s.c | 1 // SPDX-License-Identifier: GPL-2.0-only
2 // SPDX-FileCopyrightText: Copyright (c) 2020-2025 NVIDIA CORPORATION & AFFILIATES.
5 // tegra210_i2s.c - Tegra210 I2S driver
56 regmap_write(i2s->regmap, TEGRA210_I2S_SLOT_CTRL + i2s->soc_data->i2s_ctrl_offset, in tegra210_i2s_set_slot_ctrl()
57 total_slots - 1); in tegra210_i2s_set_slot_ctrl()
58 regmap_write(i2s->regmap, TEGRA210_I2S_TX_SLOT_CTRL + i2s->soc_data->tx_offset, in tegra210_i2s_set_slot_ctrl()
60 regmap_write(i2s->regmap, TEGRA210_I2S_RX_SLOT_CTRL, rx_slot_mask); in tegra210_i2s_set_slot_ctrl()
70 regmap_read(i2s->regmap, TEGRA210_I2S_CTRL + i2s->soc_data->i2s_ctrl_offset, &val); in tegra210_i2s_set_clock_rate()
76 err = clk_set_rate(i2s->clk_i2s, clock_rate); in tegra210_i2s_set_clock_rate()
83 if (!IS_ERR(i2s->clk_sync_input)) { in tegra210_i2s_set_clock_rate()
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| /linux/sound/pci/ca0106/ |
| H A D | ca0106.h | 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Copyright (c) 2004 James Courtier-Dutton <James@superbug.demon.co.uk>
24 …* Enable playback 48000 and 96000 rates. (Rates other that these do not work, even with "plug:f…
28 …* Correct interrupt timing. interrupt at end of period, instead of in the middle of a playback …
31 * Single trigger call for multi channels.
34 * playback periods_min=2, periods_max=8
36 * playback hw constraints require period_size = n * 64 bytes.
50 * Implement support for Line-in capture on SB Live 24bit.
73 #define IPR_MIDI_RX_B 0x00020000 /* MIDI UART-B Receive buffer non-empty */
74 #define IPR_MIDI_TX_B 0x00010000 /* MIDI UART-B Transmit buffer empty */
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| /linux/tools/testing/selftests/alsa/conf.d/ |
| H A D | Lenovo_ThinkPad_P1_Gen2.conf | 38 # pcm.0.0 - device 0 subdevice 0
41 PLAYBACK {
43 access RW_INTERLEAVED # can be omitted - default
44 format S16_LE # can be omitted - default
45 rate 48000 # can be omitted - default
46 channels 2 # can be omitted - default
54 channels 2
62 channels 2
75 # PLAYBACK {
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| /linux/sound/pci/ctxfi/ |
| H A D | ctpcm.c | 1 // SPDX-License-Identifier: GPL-2.0-only
19 /* Hardware descriptions for playback */
97 if (!apcm->substream) in ct_atc_pcm_interrupt()
100 snd_pcm_period_elapsed(apcm->substream); in ct_atc_pcm_interrupt()
105 struct ct_atc_pcm *apcm = runtime->private_data; in ct_atc_pcm_free_substream()
106 struct ct_atc *atc = snd_pcm_substream_chip(apcm->substream); in ct_atc_pcm_free_substream()
108 atc->pcm_release_resources(atc, apcm); in ct_atc_pcm_free_substream()
109 ct_timer_instance_free(apcm->timer); in ct_atc_pcm_free_substream()
111 runtime->private_data = NULL; in ct_atc_pcm_free_substream()
114 /* pcm playback operations */
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