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ucm2: Qualcomm: add Asus Zenbook A14
by GitHub pull_request - opened 10 Apr '25

10 Apr '25

alsa-project/alsa-ucm-conf pull request #544 was opened from alexVinarskis: Add a Regex string, seems compatible with Lenovo T14s x2 speakers, x2 DMICs, x3 DP (x2 USB-C, x1 DP->HDMI), headphone jack. Initial support for the platform is available on the [lists](https://lore.kernel.org/all/20250402084646.10098-1-alex.vinarskis@gm…, with [Audio part ](https://github.com/alexVinarskis/linux-x1e80100-zenbook-a14/blob/master/0013-arm64-dts-qcom-support-sound-on-Asus-Zenbook-A14.patch)not being upstreamed just yet. Tested that speakers, MICs and jack are working. Respective audioreach-topology changes are open [for PR.](https://github.com/linux-msm/audioreach-topology/pull/14) Request URL : https://github.com/alsa-project/alsa-ucm-conf/pull/544 Patch URL : https://github.com/alsa-project/alsa-ucm-conf/pull/544.patch Repository URL: https://github.com/alsa-project/alsa-ucm-conf

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[PATCH 1/1] bat: Fix buffer time configuration
by Alexander Stein 10 Apr '25

10 Apr '25

By swapping time configuration some hardware constraints can be supported. Fixes the error: Set parameter to device error: buffer time: 500000 hw:tqmtlv320aic32: Invalid argument(-22) Signed-off-by: Alexander Stein <alexander.stein(a)ew.tq-group.com> --- Our common 'alsabat -Dhw:tqmtlv320aic32 -f S16_LE -c 2 -r 44100 -F 997:500' failed ona i.MX95 based platform, while it worked flawlessly on others, e.g. i.MX8M Plus. Upon searching I stumbled across [1], which this patch is inspired/based on. [1] https://github.com/arkq/bluez-alsa/pull/290/commits/da78b82ff77310093b4b4a9… --- bat/alsa.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/bat/alsa.c b/bat/alsa.c index 67489c4..457e79a 100644 --- a/bat/alsa.c +++ b/bat/alsa.c @@ -221,23 +221,23 @@ static int set_snd_pcm_params(struct bat *bat, struct pcm_container *sndpcm) period_time = buffer_time / DIV_BUFFERTIME; - /* Set buffer time and period time */ - err = snd_pcm_hw_params_set_buffer_time_near(sndpcm->handle, - params, &buffer_time, 0); + /* Set period time and buffer time */ + err = snd_pcm_hw_params_set_period_time_near(sndpcm->handle, + params, &period_time, 0); if (err < 0) { fprintf(bat->err, _("Set parameter to device error: ")); - fprintf(bat->err, _("buffer time: %d %s: %s(%d)\n"), - buffer_time, + fprintf(bat->err, _("period time: %d %s: %s(%d)\n"), + period_time, device_name, snd_strerror(err), err); return err; } - err = snd_pcm_hw_params_set_period_time_near(sndpcm->handle, - params, &period_time, 0); + err = snd_pcm_hw_params_set_buffer_time_near(sndpcm->handle, + params, &buffer_time, 0); if (err < 0) { fprintf(bat->err, _("Set parameter to device error: ")); - fprintf(bat->err, _("period time: %d %s: %s(%d)\n"), - period_time, + fprintf(bat->err, _("buffer time: %d %s: %s(%d)\n"), + buffer_time, device_name, snd_strerror(err), err); return err; } -- 2.43.0

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[PATCH v2] ALSA: hda/tas2781: Create a common header for both spi and i2c tas2781 hda driver
by Shenghao Ding 10 Apr '25

10 Apr '25

Move the common macro definition of kcontrols into a common header. Signed-off-by: Shenghao Ding <shenghao-ding(a)ti.com> --- v2: - Follow IWYU principle, add sound/asound.h into the header file. v1: - Revise the year of spi and i2c tas2781 hda drivers. - Create a common header for both spi and i2c tas2781 hda driver to define the common macros and declare the common functions. --- sound/pci/hda/tas2781_hda.h | 44 +++++++++++++++++++++++++++++++++ sound/pci/hda/tas2781_hda_i2c.c | 29 ++-------------------- sound/pci/hda/tas2781_hda_spi.c | 35 ++------------------------ 3 files changed, 48 insertions(+), 60 deletions(-) create mode 100644 sound/pci/hda/tas2781_hda.h diff --git a/sound/pci/hda/tas2781_hda.h b/sound/pci/hda/tas2781_hda.h new file mode 100644 index 000000000000..fc741fac419a --- /dev/null +++ b/sound/pci/hda/tas2781_hda.h @@ -0,0 +1,44 @@ +/* SPDX-License-Identifier: GPL-2.0-only + * + * HDA audio driver for Texas Instruments TAS2781 smart amp + * + * Copyright (C) 2025 Texas Instruments, Inc. + */ +#ifndef __TAS2781_HDA_H__ +#define __TAS2781_HDA_H__ + +#include <sound/asound.h> + +/* + * No standard control callbacks for SNDRV_CTL_ELEM_IFACE_CARD + * Define two controls, one is Volume control callbacks, the other is + * flag setting control callbacks. + */ + +/* Volume control callbacks for tas2781 */ +#define ACARD_SINGLE_RANGE_EXT_TLV(xname, xreg, xshift, xmin, xmax, xinvert, \ + xhandler_get, xhandler_put, tlv_array) { \ + .iface = SNDRV_CTL_ELEM_IFACE_CARD, .name = (xname), \ + .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | \ + SNDRV_CTL_ELEM_ACCESS_READWRITE, \ + .tlv.p = (tlv_array), \ + .info = snd_soc_info_volsw, \ + .get = xhandler_get, .put = xhandler_put, \ + .private_value = (unsigned long)&(struct soc_mixer_control) { \ + .reg = xreg, .rreg = xreg, \ + .shift = xshift, .rshift = xshift,\ + .min = xmin, .max = xmax, .invert = xinvert, \ + } \ +} + +/* Flag control callbacks for tas2781 */ +#define ACARD_SINGLE_BOOL_EXT(xname, xdata, xhandler_get, xhandler_put) { \ + .iface = SNDRV_CTL_ELEM_IFACE_CARD, \ + .name = xname, \ + .info = snd_ctl_boolean_mono_info, \ + .get = xhandler_get, \ + .put = xhandler_put, \ + .private_value = xdata, \ +} + +#endif diff --git a/sound/pci/hda/tas2781_hda_i2c.c b/sound/pci/hda/tas2781_hda_i2c.c index 29dc4f500580..9d94ae5fcfe0 100644 --- a/sound/pci/hda/tas2781_hda_i2c.c +++ b/sound/pci/hda/tas2781_hda_i2c.c @@ -2,7 +2,7 @@ // // TAS2781 HDA I2C driver // -// Copyright 2023 - 2024 Texas Instruments, Inc. +// Copyright 2023 - 2025 Texas Instruments, Inc. // // Author: Shenghao Ding <shenghao-ding(a)ti.com> // Current maintainer: Baojun Xu <baojun.xu(a)ti.com> @@ -30,35 +30,10 @@ #include "hda_component.h" #include "hda_jack.h" #include "hda_generic.h" +#include "tas2781_hda.h" #define TASDEVICE_SPEAKER_CALIBRATION_SIZE 20 -/* No standard control callbacks for SNDRV_CTL_ELEM_IFACE_CARD - * Define two controls, one is Volume control callbacks, the other is - * flag setting control callbacks. - */ - -/* Volume control callbacks for tas2781 */ -#define ACARD_SINGLE_RANGE_EXT_TLV(xname, xreg, xshift, xmin, xmax, xinvert, \ - xhandler_get, xhandler_put, tlv_array) \ -{ .iface = SNDRV_CTL_ELEM_IFACE_CARD, .name = (xname),\ - .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\ - SNDRV_CTL_ELEM_ACCESS_READWRITE,\ - .tlv.p = (tlv_array), \ - .info = snd_soc_info_volsw, \ - .get = xhandler_get, .put = xhandler_put, \ - .private_value = (unsigned long)&(struct soc_mixer_control) \ - {.reg = xreg, .rreg = xreg, .shift = xshift, \ - .rshift = xshift, .min = xmin, .max = xmax, \ - .invert = xinvert} } - -/* Flag control callbacks for tas2781 */ -#define ACARD_SINGLE_BOOL_EXT(xname, xdata, xhandler_get, xhandler_put) \ -{ .iface = SNDRV_CTL_ELEM_IFACE_CARD, .name = xname, \ - .info = snd_ctl_boolean_mono_info, \ - .get = xhandler_get, .put = xhandler_put, \ - .private_value = xdata } - enum calib_data { R0_VAL = 0, INV_R0, diff --git a/sound/pci/hda/tas2781_hda_spi.c b/sound/pci/hda/tas2781_hda_spi.c index 399f2e4c3b62..c6be2be1b53e 100644 --- a/sound/pci/hda/tas2781_hda_spi.c +++ b/sound/pci/hda/tas2781_hda_spi.c @@ -2,7 +2,7 @@ // // TAS2781 HDA SPI driver // -// Copyright 2024 Texas Instruments, Inc. +// Copyright 2024 - 2025 Texas Instruments, Inc. // // Author: Baojun Xu <baojun.xu(a)ti.com> @@ -38,38 +38,7 @@ #include "hda_component.h" #include "hda_jack.h" #include "hda_generic.h" - -/* - * No standard control callbacks for SNDRV_CTL_ELEM_IFACE_CARD - * Define two controls, one is Volume control callbacks, the other is - * flag setting control callbacks. - */ - -/* Volume control callbacks for tas2781 */ -#define ACARD_SINGLE_RANGE_EXT_TLV(xname, xreg, xshift, xmin, xmax, xinvert, \ - xhandler_get, xhandler_put, tlv_array) { \ - .iface = SNDRV_CTL_ELEM_IFACE_CARD, .name = (xname), \ - .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | \ - SNDRV_CTL_ELEM_ACCESS_READWRITE, \ - .tlv.p = (tlv_array), \ - .info = snd_soc_info_volsw, \ - .get = xhandler_get, .put = xhandler_put, \ - .private_value = (unsigned long)&(struct soc_mixer_control) { \ - .reg = xreg, .rreg = xreg, \ - .shift = xshift, .rshift = xshift,\ - .min = xmin, .max = xmax, .invert = xinvert, \ - } \ -} - -/* Flag control callbacks for tas2781 */ -#define ACARD_SINGLE_BOOL_EXT(xname, xdata, xhandler_get, xhandler_put) { \ - .iface = SNDRV_CTL_ELEM_IFACE_CARD, \ - .name = xname, \ - .info = snd_ctl_boolean_mono_info, \ - .get = xhandler_get, \ - .put = xhandler_put, \ - .private_value = xdata, \ -} +#include "tas2781_hda.h" struct tas2781_hda { struct tasdevice_priv *priv; -- 2.34.1

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Enable Headset Mic for ASUS platform
by Kailang 09 Apr '25

09 Apr '25

Hi Takashi, Attach patch was fixed headset Mic issue for Asus platform. Many Thanks. Kailang.

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Dell Precision 3571: DMIC not detected by SOF driver, silent mic under Linux, works in Windows
by Adam Larios 08 Apr '25

08 Apr '25

*System*: Dell Precision 3571 Realtek ALC3204 codec Intel Alder Lake (SOF platform) *Symptoms*: Internal mic is silent or muffled in all Linux applications Works perfectly in Windows SOF driver loads correctly with firmware sof-adl.ri and topology sof-hda-generic.tplg But dmesg shows: sof-audio-pci-intel-tgl 0000:00:1f.3: DMICs detected in NHLT tables: 0 No working audio input nodes exposed in PipeWire *Tested*: - Ubuntu 24.04 with kernel 6.8.0-57-generic - snd-intel-dspcfg.dsp_driver=3 set - PulseAudio and PipeWire backends - alsa-base.conf overrides for model options - hdajackretask pin remapping - SOF firmware and topology confirmed present *Conclusion*: Firmware/ACPI likely missing DMIC NHLT entry; requesting kernel quirk or guidance

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[PATCH v1] ALSA: hda/tas2781: Create a common header for both spi and i2c tas2781 hda driver
by Shenghao Ding 08 Apr '25

08 Apr '25

Move the common macro definition of kcontrols into a common header. Signed-off-by: Shenghao Ding <shenghao-ding(a)ti.com> --- v1: - revise the year of spi and i2c tas2781 hda drivers. - Create a common header for both spi and i2c tas2781 hda driver to define the common macros and declare the common functions. --- sound/pci/hda/tas2781_hda.h | 42 +++++++++++++++++++++++++++++++++ sound/pci/hda/tas2781_hda_i2c.c | 29 ++--------------------- sound/pci/hda/tas2781_hda_spi.c | 35 ++------------------------- 3 files changed, 46 insertions(+), 60 deletions(-) create mode 100644 sound/pci/hda/tas2781_hda.h diff --git a/sound/pci/hda/tas2781_hda.h b/sound/pci/hda/tas2781_hda.h new file mode 100644 index 000000000000..c57909c0ed65 --- /dev/null +++ b/sound/pci/hda/tas2781_hda.h @@ -0,0 +1,42 @@ +/* SPDX-License-Identifier: GPL-2.0-only + * + * HDA audio driver for Texas Instruments TAS2781 smart amp + * + * Copyright (C) 2025 Texas Instruments, Inc. + */ +#ifndef __TAS2781_HDA_H__ +#define __TAS2781_HDA_H__ + +/* + * No standard control callbacks for SNDRV_CTL_ELEM_IFACE_CARD + * Define two controls, one is Volume control callbacks, the other is + * flag setting control callbacks. + */ + +/* Volume control callbacks for tas2781 */ +#define ACARD_SINGLE_RANGE_EXT_TLV(xname, xreg, xshift, xmin, xmax, xinvert, \ + xhandler_get, xhandler_put, tlv_array) { \ + .iface = SNDRV_CTL_ELEM_IFACE_CARD, .name = (xname), \ + .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | \ + SNDRV_CTL_ELEM_ACCESS_READWRITE, \ + .tlv.p = (tlv_array), \ + .info = snd_soc_info_volsw, \ + .get = xhandler_get, .put = xhandler_put, \ + .private_value = (unsigned long)&(struct soc_mixer_control) { \ + .reg = xreg, .rreg = xreg, \ + .shift = xshift, .rshift = xshift,\ + .min = xmin, .max = xmax, .invert = xinvert, \ + } \ +} + +/* Flag control callbacks for tas2781 */ +#define ACARD_SINGLE_BOOL_EXT(xname, xdata, xhandler_get, xhandler_put) { \ + .iface = SNDRV_CTL_ELEM_IFACE_CARD, \ + .name = xname, \ + .info = snd_ctl_boolean_mono_info, \ + .get = xhandler_get, \ + .put = xhandler_put, \ + .private_value = xdata, \ +} + +#endif diff --git a/sound/pci/hda/tas2781_hda_i2c.c b/sound/pci/hda/tas2781_hda_i2c.c index 29dc4f500580..9d94ae5fcfe0 100644 --- a/sound/pci/hda/tas2781_hda_i2c.c +++ b/sound/pci/hda/tas2781_hda_i2c.c @@ -2,7 +2,7 @@ // // TAS2781 HDA I2C driver // -// Copyright 2023 - 2024 Texas Instruments, Inc. +// Copyright 2023 - 2025 Texas Instruments, Inc. // // Author: Shenghao Ding <shenghao-ding(a)ti.com> // Current maintainer: Baojun Xu <baojun.xu(a)ti.com> @@ -30,35 +30,10 @@ #include "hda_component.h" #include "hda_jack.h" #include "hda_generic.h" +#include "tas2781_hda.h" #define TASDEVICE_SPEAKER_CALIBRATION_SIZE 20 -/* No standard control callbacks for SNDRV_CTL_ELEM_IFACE_CARD - * Define two controls, one is Volume control callbacks, the other is - * flag setting control callbacks. - */ - -/* Volume control callbacks for tas2781 */ -#define ACARD_SINGLE_RANGE_EXT_TLV(xname, xreg, xshift, xmin, xmax, xinvert, \ - xhandler_get, xhandler_put, tlv_array) \ -{ .iface = SNDRV_CTL_ELEM_IFACE_CARD, .name = (xname),\ - .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\ - SNDRV_CTL_ELEM_ACCESS_READWRITE,\ - .tlv.p = (tlv_array), \ - .info = snd_soc_info_volsw, \ - .get = xhandler_get, .put = xhandler_put, \ - .private_value = (unsigned long)&(struct soc_mixer_control) \ - {.reg = xreg, .rreg = xreg, .shift = xshift, \ - .rshift = xshift, .min = xmin, .max = xmax, \ - .invert = xinvert} } - -/* Flag control callbacks for tas2781 */ -#define ACARD_SINGLE_BOOL_EXT(xname, xdata, xhandler_get, xhandler_put) \ -{ .iface = SNDRV_CTL_ELEM_IFACE_CARD, .name = xname, \ - .info = snd_ctl_boolean_mono_info, \ - .get = xhandler_get, .put = xhandler_put, \ - .private_value = xdata } - enum calib_data { R0_VAL = 0, INV_R0, diff --git a/sound/pci/hda/tas2781_hda_spi.c b/sound/pci/hda/tas2781_hda_spi.c index 399f2e4c3b62..c6be2be1b53e 100644 --- a/sound/pci/hda/tas2781_hda_spi.c +++ b/sound/pci/hda/tas2781_hda_spi.c @@ -2,7 +2,7 @@ // // TAS2781 HDA SPI driver // -// Copyright 2024 Texas Instruments, Inc. +// Copyright 2024 - 2025 Texas Instruments, Inc. // // Author: Baojun Xu <baojun.xu(a)ti.com> @@ -38,38 +38,7 @@ #include "hda_component.h" #include "hda_jack.h" #include "hda_generic.h" - -/* - * No standard control callbacks for SNDRV_CTL_ELEM_IFACE_CARD - * Define two controls, one is Volume control callbacks, the other is - * flag setting control callbacks. - */ - -/* Volume control callbacks for tas2781 */ -#define ACARD_SINGLE_RANGE_EXT_TLV(xname, xreg, xshift, xmin, xmax, xinvert, \ - xhandler_get, xhandler_put, tlv_array) { \ - .iface = SNDRV_CTL_ELEM_IFACE_CARD, .name = (xname), \ - .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | \ - SNDRV_CTL_ELEM_ACCESS_READWRITE, \ - .tlv.p = (tlv_array), \ - .info = snd_soc_info_volsw, \ - .get = xhandler_get, .put = xhandler_put, \ - .private_value = (unsigned long)&(struct soc_mixer_control) { \ - .reg = xreg, .rreg = xreg, \ - .shift = xshift, .rshift = xshift,\ - .min = xmin, .max = xmax, .invert = xinvert, \ - } \ -} - -/* Flag control callbacks for tas2781 */ -#define ACARD_SINGLE_BOOL_EXT(xname, xdata, xhandler_get, xhandler_put) { \ - .iface = SNDRV_CTL_ELEM_IFACE_CARD, \ - .name = xname, \ - .info = snd_ctl_boolean_mono_info, \ - .get = xhandler_get, \ - .put = xhandler_put, \ - .private_value = xdata, \ -} +#include "tas2781_hda.h" struct tas2781_hda { struct tasdevice_priv *priv; -- 2.34.1

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ucm2: Qualcomm: add Lenovo ThinkBook 16 support
by GitHub pull_request - opened 08 Apr '25

08 Apr '25

alsa-project/alsa-ucm-conf pull request #543 was opened from jglathe: add a Regex string, seems compatible with Thinkpad T14s Tested-by: Jens Glathe <jens.glathe(a)oldschoolsolutions.biz> Request URL : https://github.com/alsa-project/alsa-ucm-conf/pull/543 Patch URL : https://github.com/alsa-project/alsa-ucm-conf/pull/543.patch Repository URL: https://github.com/alsa-project/alsa-ucm-conf

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Fireworks Alsa Driver Buffer SIze
by jayt0808＠gmail.com 08 Apr '25

08 Apr '25

Hi I'm using an AudioFire 8a that has 16 channels over the firewire bus and the snd-fireworks alsa firewire driver. In Jack, when I set Frames/Period to anything higher than 64, alsa fails with an error saying Mon Apr 7 22:15:35 2025: ERROR: ALSA: cannot set hardware parameters for capture Mon Apr 7 22:15:35 2025: ERROR: ALSA: cannot configure capture channel I noticed that the output of "aplay -D hw:1,0 --dump-hw-params /dev/zero" indicated the following alsa settings: Playing raw data '/dev/zero' : Unsigned 8 bit, Rate 8000 Hz, Mono HW Params of device "hw:1,0": -------------------- ACCESS: MMAP_INTERLEAVED RW_INTERLEAVED FORMAT: S32_LE SUBFORMAT: STD SAMPLE_BITS: 32 FRAME_BITS: [384 512] CHANNELS: [12 16] RATE: [32000 96000] PERIOD_TIME: [250 32000] PERIOD_SIZE: [16 2720] PERIOD_BYTES: [768 131072] PERIODS: [2 341] BUFFER_TIME: (333 170500] BUFFER_SIZE: [32 5456] BUFFER_BYTES: [1536 262144] TICK_TIME: ALL -------------------- aplay: set_params:1371: Sample format non available Available formats: - S32_LE I was concerned that the BUFFER_SIZE was too small to support 16 channels at a 128 Frames/Period size. But when I modded the driver to increase this figure, it did not fix the issue. Anyone have any insight on this issue? Running Ubuntu 24.04 with kernel 6.8.0-57-lowlatency. Everything seems to work fine when I set 64 Frames/Period (except the occasional annoying stuttering that one can expect in that scenario; with a buffer that is too small to support the system load). Thanks Jay

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[PATCH v2] ASoC: dwc: always enable/disable i2s irqs
by Brady Norander 08 Apr '25

08 Apr '25

Commit a42e988 ("ASoC: dwc: add DMA handshake control") changed the behavior of the driver to not enable or disable i2s irqs if using DMA. This breaks platforms such as AMD ACP. Audio playback appears to work but no audio can be heard. Revert to the old behavior by always enabling and disabling i2s irqs while keeping DMA handshake control. Fixes: a42e988 ("ASoC: dwc: add DMA handshake control") Signed-off-by: Brady Norander <bradynorander(a)gmail.com> --- v2: reword commit message to better describe the issue --- sound/soc/dwc/dwc-i2s.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/sound/soc/dwc/dwc-i2s.c b/sound/soc/dwc/dwc-i2s.c index 57b789d7fbed..5b4f20dbf7bb 100644 --- a/sound/soc/dwc/dwc-i2s.c +++ b/sound/soc/dwc/dwc-i2s.c @@ -199,12 +199,10 @@ static void i2s_start(struct dw_i2s_dev *dev, else i2s_write_reg(dev->i2s_base, IRER, 1); - /* I2S needs to enable IRQ to make a handshake with DMAC on the JH7110 SoC */ - if (dev->use_pio || dev->is_jh7110) - i2s_enable_irqs(dev, substream->stream, config->chan_nr); - else + if (!(dev->use_pio || dev->is_jh7110)) i2s_enable_dma(dev, substream->stream); + i2s_enable_irqs(dev, substream->stream, config->chan_nr); i2s_write_reg(dev->i2s_base, CER, 1); } @@ -218,11 +216,12 @@ static void i2s_stop(struct dw_i2s_dev *dev, else i2s_write_reg(dev->i2s_base, IRER, 0); - if (dev->use_pio || dev->is_jh7110) - i2s_disable_irqs(dev, substream->stream, 8); - else + if (!(dev->use_pio || dev->is_jh7110)) i2s_disable_dma(dev, substream->stream); + i2s_disable_irqs(dev, substream->stream, 8); + + if (!dev->active) { i2s_write_reg(dev->i2s_base, CER, 0); i2s_write_reg(dev->i2s_base, IER, 0); -- 2.49.0

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pcm: hw: do not reset tstamp_type in SND_PCM_APPEND mode
by GitHub pull_request - opened 07 Apr '25

07 Apr '25

alsa-project/alsa-lib pull request #450 was opened from kgroeneveld: When the first client of plugins such as dshare open the hw device they set a default tstamp_type in snd_pcm_direct_initialize_slave based on tstamp_type from the config file. But when subsequent clients open the same plugin the snd_pcm_hw_open_fd function clobbers this default. Request URL : https://github.com/alsa-project/alsa-lib/pull/450 Patch URL : https://github.com/alsa-project/alsa-lib/pull/450.patch Repository URL: https://github.com/alsa-project/alsa-lib

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