May 2023 - Alsa-devel - mailman.alsa-project.org

[PATCH] pcm: remove duplicate SND_PCM_HW_PARAM_{FIRST,LAST}_* #defines
by Oswald Buddenhagen 03 May '23

03 May '23

Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen(a)gmx.de> --- one might also want to re-arrange the remaining items. --- src/pcm/pcm_local.h | 4 ---- 1 file changed, 4 deletions(-) diff --git a/src/pcm/pcm_local.h b/src/pcm/pcm_local.h index abea6654..6a0e71e7 100644 --- a/src/pcm/pcm_local.h +++ b/src/pcm/pcm_local.h @@ -48,24 +48,20 @@ #include "mask.h" #define SND_PCM_HW_PARAM_ACCESS SNDRV_PCM_HW_PARAM_ACCESS -#define SND_PCM_HW_PARAM_FIRST_MASK SNDRV_PCM_HW_PARAM_FIRST_MASK #define SND_PCM_HW_PARAM_FORMAT SNDRV_PCM_HW_PARAM_FORMAT #define SND_PCM_HW_PARAM_SUBFORMAT SNDRV_PCM_HW_PARAM_SUBFORMAT -#define SND_PCM_HW_PARAM_LAST_MASK SNDRV_PCM_HW_PARAM_LAST_MASK #define SND_PCM_HW_PARAM_SAMPLE_BITS SNDRV_PCM_HW_PARAM_SAMPLE_BITS -#define SND_PCM_HW_PARAM_FIRST_INTERVAL SNDRV_PCM_HW_PARAM_FIRST_INTERVAL #define SND_PCM_HW_PARAM_FRAME_BITS SNDRV_PCM_HW_PARAM_FRAME_BITS #define SND_PCM_HW_PARAM_CHANNELS SNDRV_PCM_HW_PARAM_CHANNELS #define SND_PCM_HW_PARAM_RATE SNDRV_PCM_HW_PARAM_RATE #define SND_PCM_HW_PARAM_PERIOD_TIME SNDRV_PCM_HW_PARAM_PERIOD_TIME #define SND_PCM_HW_PARAM_PERIOD_SIZE SNDRV_PCM_HW_PARAM_PERIOD_SIZE #define SND_PCM_HW_PARAM_PERIOD_BYTES SNDRV_PCM_HW_PARAM_PERIOD_BYTES #define SND_PCM_HW_PARAM_PERIODS SNDRV_PCM_HW_PARAM_PERIODS #define SND_PCM_HW_PARAM_BUFFER_TIME SNDRV_PCM_HW_PARAM_BUFFER_TIME #define SND_PCM_HW_PARAM_BUFFER_SIZE SNDRV_PCM_HW_PARAM_BUFFER_SIZE #define SND_PCM_HW_PARAM_BUFFER_BYTES SNDRV_PCM_HW_PARAM_BUFFER_BYTES #define SND_PCM_HW_PARAM_TICK_TIME SNDRV_PCM_HW_PARAM_TICK_TIME -#define SND_PCM_HW_PARAM_LAST_INTERVAL SNDRV_PCM_HW_PARAM_LAST_INTERVAL #define SND_PCM_HW_PARAM_LAST_MASK SNDRV_PCM_HW_PARAM_LAST_MASK #define SND_PCM_HW_PARAM_FIRST_MASK SNDRV_PCM_HW_PARAM_FIRST_MASK #define SND_PCM_HW_PARAM_LAST_INTERVAL SNDRV_PCM_HW_PARAM_LAST_INTERVAL -- 2.40.0.152.g15d061e6df

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[PATCH] conf/emu10k1: remove compat with two decades old drivers
by Oswald Buddenhagen 03 May '23

03 May '23

There really isn't much of a point to clutter the files with this. Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen(a)gmx.de> --- src/conf/cards/Audigy.conf | 65 ------------------------------ src/conf/cards/Audigy2.conf | 79 ------------------------------------- src/conf/cards/EMU10K1.conf | 48 ---------------------- 3 files changed, 192 deletions(-) diff --git a/src/conf/cards/Audigy.conf b/src/conf/cards/Audigy.conf index 1c924966..42692cfd 100644 --- a/src/conf/cards/Audigy.conf +++ b/src/conf/cards/Audigy.conf @@ -26,31 +26,14 @@ Audigy.pcm.front.0 { optional true value [ 255 255 0 0 0 0 0 0 255 0 0 0 0 0 0 0 0 255 0 0 0 0 0 0 ] } - { - # for compatibility with older drivers - name "EMU10K1 PCM Send Volume" - index { @func private_pcm_subdevice } - lock true - optional true - value [ 255 255 0 0 0 0 0 0 255 0 0 0 0 0 0 0 0 255 0 0 0 0 0 0 ] - } { interface PCM name "EMU10K1 PCM Send Routing" index { @func private_pcm_subdevice } lock true optional true value [ 8 9 0 0 0 0 0 0 8 9 0 0 0 0 0 0 8 9 0 0 0 0 0 0 ] } - { - # for compatibility with older drivers - name "EMU10K1 PCM Send Routing" - index { @func private_pcm_subdevice } - lock true - optional true - value [ 8 9 0 0 0 0 0 0 8 9 0 0 0 0 0 0 8 9 0 0 0 0 0 0 ] - } - ] } } @@ -79,14 +62,6 @@ Audigy.pcm.rear.0 { optional true value [ 0 0 255 255 0 0 0 0 0 0 255 0 0 0 0 0 0 0 0 255 0 0 0 0 ] } - { - # for compatibility with older drivers - name "EMU10K1 PCM Send Volume" - index { @func private_pcm_subdevice } - lock true - optional true - value [ 0 0 255 255 0 0 0 0 0 0 255 0 0 0 0 0 0 0 0 255 0 0 0 0 ] - } ] } } @@ -115,30 +90,14 @@ Audigy.pcm.center_lfe.0 { optional true value [ 255 255 0 0 0 0 0 0 255 0 0 0 0 0 0 0 0 255 0 0 0 0 0 0 ] } - { - # for compatibility with older drivers - name "EMU10K1 PCM Send Volume" - index { @func private_pcm_subdevice } - lock true - optional true - value [ 255 255 0 0 0 0 0 0 255 0 0 0 0 0 0 0 0 255 0 0 0 0 0 0 ] - } { interface PCM name "EMU10K1 PCM Send Routing" index { @func private_pcm_subdevice } lock true optional true value [ 6 7 0 0 0 0 0 0 6 7 0 0 0 0 0 0 6 7 0 0 0 0 0 0 ] } - { - # for compatibility with older drivers - name "EMU10K1 PCM Send Routing" - index { @func private_pcm_subdevice } - lock true - optional true - value [ 6 7 0 0 0 0 0 0 6 7 0 0 0 0 0 0 6 7 0 0 0 0 0 0 ] - } ] } } @@ -265,14 +224,6 @@ Audigy.pcm.iec958.0 { optional true value [ $AES0 $AES1 $AES2 $AES3 ] } - { - # for compatibility with older drivers - name "IEC958 Playback Default" - lock true - preserve true - optional true - value [ $AES0 $AES1 $AES2 $AES3 ] - } { name "IEC958 Optical Raw Playback Switch" lock true @@ -287,30 +238,14 @@ Audigy.pcm.iec958.0 { optional true value [ 255 255 0 0 0 0 0 0 255 0 0 0 0 0 0 0 0 255 0 0 0 0 0 0 ] } - { - # for compatibility with older drivers - name "EMU10K1 PCM Send Volume" - index { @func private_pcm_subdevice } - lock true - optional true - value [ 255 255 0 0 0 0 0 0 255 0 0 0 0 0 0 0 0 255 0 0 0 0 0 0 ] - } { interface PCM name "EMU10K1 PCM Send Routing" index { @func private_pcm_subdevice } lock true optional true value [ 20 21 0 0 0 0 0 0 20 21 0 0 0 0 0 0 20 21 0 0 0 0 0 0 ] } - { - # for compatibility with older drivers - name "EMU10K1 PCM Send Routing" - index { @func private_pcm_subdevice } - lock true - optional true - value [ 20 21 0 0 0 0 0 0 20 21 0 0 0 0 0 0 20 21 0 0 0 0 0 0 ] - } { name "Audigy Analog/Digital Output Jack" lock true diff --git a/src/conf/cards/Audigy2.conf b/src/conf/cards/Audigy2.conf index cbec7835..35126d23 100644 --- a/src/conf/cards/Audigy2.conf +++ b/src/conf/cards/Audigy2.conf @@ -26,30 +26,14 @@ Audigy2.pcm.front.0 { optional true value [ 255 255 0 0 0 0 0 0 255 0 0 0 0 0 0 0 0 255 0 0 0 0 0 0 ] } - { - # for compatibility with older drivers - name "EMU10K1 PCM Send Volume" - index { @func private_pcm_subdevice } - lock true - optional true - value [ 255 255 0 0 0 0 0 0 255 0 0 0 0 0 0 0 0 255 0 0 0 0 0 0 ] - } { interface PCM name "EMU10K1 PCM Send Routing" index { @func private_pcm_subdevice } lock true optional true value [ 8 9 0 0 0 0 0 0 8 9 0 0 0 0 0 0 8 9 0 0 0 0 0 0 ] } - { - # for compatibility with older drivers - name "EMU10K1 PCM Send Routing" - index { @func private_pcm_subdevice } - lock true - optional true - value [ 8 9 0 0 0 0 0 0 8 9 0 0 0 0 0 0 8 9 0 0 0 0 0 0 ] - } ] } @@ -79,14 +63,6 @@ Audigy2.pcm.rear.0 { optional true value [ 0 0 255 255 0 0 0 0 0 0 255 0 0 0 0 0 0 0 0 255 0 0 0 0 ] } - { - # for compatibility with older drivers - name "EMU10K1 PCM Send Volume" - index { @func private_pcm_subdevice } - lock true - optional true - value [ 0 0 255 255 0 0 0 0 0 0 255 0 0 0 0 0 0 0 0 255 0 0 0 0 ] - } ] } } @@ -115,30 +91,14 @@ Audigy2.pcm.center_lfe.0 { optional true value [ 255 255 0 0 0 0 0 0 255 0 0 0 0 0 0 0 0 255 0 0 0 0 0 0 ] } - { - # for compatibility with older drivers - name "EMU10K1 PCM Send Volume" - index { @func private_pcm_subdevice } - lock true - optional true - value [ 255 255 0 0 0 0 0 0 255 0 0 0 0 0 0 0 0 255 0 0 0 0 0 0 ] - } { interface PCM name "EMU10K1 PCM Send Routing" index { @func private_pcm_subdevice } lock true optional true value [ 6 7 0 0 0 0 0 0 6 7 0 0 0 0 0 0 6 7 0 0 0 0 0 0 ] } - { - # for compatibility with older drivers - name "EMU10K1 PCM Send Routing" - index { @func private_pcm_subdevice } - lock true - optional true - value [ 6 7 0 0 0 0 0 0 6 7 0 0 0 0 0 0 6 7 0 0 0 0 0 0 ] - } ] } } @@ -167,30 +127,14 @@ Audigy2.pcm.side.0 { optional true value [ 255 255 0 0 0 0 0 0 255 0 0 0 0 0 0 0 0 255 0 0 0 0 0 0 ] } - { - # for compatibility with older drivers - name "EMU10K1 PCM Send Volume" - index { @func private_pcm_subdevice } - lock true - optional true - value [ 255 255 0 0 0 0 0 0 255 0 0 0 0 0 0 0 0 255 0 0 0 0 0 0 ] - } { interface PCM name "EMU10K1 PCM Send Routing" index { @func private_pcm_subdevice } lock true optional true value [ 14 15 0 0 0 0 0 0 14 15 0 0 0 0 0 0 14 15 0 0 0 0 0 0 ] } - { - # for compatibility with older drivers - name "EMU10K1 PCM Send Routing" - index { @func private_pcm_subdevice } - lock true - optional true - value [ 14 15 0 0 0 0 0 0 14 15 0 0 0 0 0 0 14 15 0 0 0 0 0 0 ] - } ] } } @@ -374,13 +318,6 @@ Audigy2.pcm.iec958.0 { optional true value [ $AES0 $AES1 $AES2 $AES3 ] } - { - # for compatibility with older drivers - name "IEC958 Playback Default" - preserve true - optional true - value [ $AES0 $AES1 $AES2 $AES3 ] - } { name "IEC958 Optical Raw Playback Switch" lock true @@ -395,30 +332,14 @@ Audigy2.pcm.iec958.0 { optional true value [ 255 255 0 0 0 0 0 0 255 0 0 0 0 0 0 0 0 255 0 0 0 0 0 0 ] } - { - # for compatibility with older drivers - name "EMU10K1 PCM Send Volume" - index { @func private_pcm_subdevice } - lock true - optional true - value [ 255 255 0 0 0 0 0 0 255 0 0 0 0 0 0 0 0 255 0 0 0 0 0 0 ] - } { interface PCM name "EMU10K1 PCM Send Routing" index { @func private_pcm_subdevice } lock true optional true value [ 20 21 0 0 0 0 0 0 20 21 0 0 0 0 0 0 20 21 0 0 0 0 0 0 ] } - { - # for compatibility with older drivers - name "EMU10K1 PCM Send Routing" - index { @func private_pcm_subdevice } - lock true - optional true - value [ 20 21 0 0 0 0 0 0 20 21 0 0 0 0 0 0 20 21 0 0 0 0 0 0 ] - } { name "Audigy Analog/Digital Output Jack" lock true diff --git a/src/conf/cards/EMU10K1.conf b/src/conf/cards/EMU10K1.conf index ef193fe0..430926c7 100644 --- a/src/conf/cards/EMU10K1.conf +++ b/src/conf/cards/EMU10K1.conf @@ -28,30 +28,14 @@ EMU10K1.pcm.front.0 { optional true value [ 255 255 0 0 255 0 0 0 0 255 0 0 ] } - { - # for compatibility with older drivers - name "EMU10K1 PCM Send Volume" - index { @func private_pcm_subdevice } - # lock true - optional true - value [ 255 255 0 0 255 0 0 0 0 255 0 0 ] - } { interface PCM name "EMU10K1 PCM Send Routing" index { @func private_pcm_subdevice } # lock true optional true value [ 8 9 0 0 8 9 0 0 8 9 0 0 ] } - { - # for compatibility with older drivers - name "EMU10K1 PCM Send Routing" - index { @func private_pcm_subdevice } - # lock true - optional true - value [ 8 9 0 0 8 9 0 0 8 9 0 0 ] - } ] } } @@ -87,14 +71,6 @@ EMU10K1.pcm.rear.0 { optional true value [ 0 0 255 255 0 0 255 0 0 0 0 255 ] } - { - # for compatibility with older drivers - name "EMU10K1 PCM Send Volume" - index { @func private_pcm_subdevice } - # lock true - optional true - value [ 0 0 255 255 0 0 255 0 0 0 0 255 ] - } ] } } @@ -152,30 +128,14 @@ EMU10K1.pcm.center_lfe.0 { optional true value [ 255 255 0 0 255 0 0 0 0 255 0 0 ] } - { - # for compatibility with older drivers - name "EMU10K1 PCM Send Volume" - index { @func private_pcm_subdevice } - # lock true - optional true - value [ 255 255 0 0 255 0 0 0 0 255 0 0 ] - } { interface PCM name "EMU10K1 PCM Send Routing" index { @func private_pcm_subdevice } # lock true optional true value [ 6 7 0 0 6 7 0 0 6 7 0 0 ] } - { - # for compatibility with older drivers - name "EMU10K1 PCM Send Routing" - index { @func private_pcm_subdevice } - # lock true - optional true - value [ 6 7 0 0 6 7 0 0 6 7 0 0 ] - } ] } } @@ -304,14 +264,6 @@ EMU10K1.pcm.iec958.0 { optional true value [ $AES0 $AES1 $AES2 $AES3 ] } - { - # for compatibility with older drivers - name "IEC958 Playback Default" - lock true - preserve true - optional true - value [ $AES0 $AES1 $AES2 $AES3 ] - } { name "IEC958 Optical Raw Playback Switch" lock true -- 2.40.0.152.g15d061e6df

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ucm2: USB-Audio: Add support for Focusrite Scarlett Solo devices
by GitHub pull_request - opened 03 May '23

03 May '23

alsa-project/alsa-ucm-conf pull request #309 was opened from kepstin: These are basically identical to the Scarlett 2i2 devices of the same generation; the difference is that the first input can only be used for a mic, and the second input can only be used for line/instrument. (On the 2i devices, both inputs are the same - they both have mic preamps, and both support line/instrument input.) I've added a new profile for them so the Comment can be set to the correct device name, but because of the similarity between the Solo and 2i devices, I've re-used the existing Scarlett-2i-HiFi use case to set up the split input devices. Request URL : https://github.com/alsa-project/alsa-ucm-conf/pull/309 Patch URL : https://github.com/alsa-project/alsa-ucm-conf/pull/309.patch Repository URL: https://github.com/alsa-project/alsa-ucm-conf

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arecord: use better time granularity mili/micro/nanoseconds for split file names
by GitHub issues - edited 03 May '23

03 May '23

alsa-project/alsa-utils issue #209 was edited from kfilipan: This is more of a feature request rather than an issue. When using `arecord` with `--max-file-time` and `--use-strftime`, one cannot get nanoseconds in the file name. This is however available in the e.g. `date` command `date +"%Y-%m-%d_%H-%M-%S.%N"` (`%N` gives nanoseconds). This would be useful for testing sound card recording time delays because having only seconds is not precise enough, e.g. it could take days or weeks for even slightly better sound cards to experience a second of delay. Thank you! Issue URL : https://github.com/alsa-project/alsa-utils/issues/209 Repository URL: https://github.com/alsa-project/alsa-utils

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Using mili/micro/nanoseconds in split files
by GitHub issues - opened 03 May '23

03 May '23

alsa-project/alsa-utils issue #209 was opened from kfilipan: This is more of a feature request rather than an issue. When using `arecord` with `--max-file-time` and `--use-strftime`, one cannot get nanoseconds in the file name. This is however available in the e.g. `date` command `date +"%Y-%m-%d_%H-%M-%S.%N"` (`%N` gives nanoseconds). This would be useful for testing sound card recording time delays because having only seconds is not precise enough, e.g. it could take days or weeks for even slightly better sound cards to experience a second of delay. Thank you! Issue URL : https://github.com/alsa-project/alsa-utils/issues/209 Repository URL: https://github.com/alsa-project/alsa-utils

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Using mili/micro/nanoseconds in split files
by GitHub issues - edited 03 May '23

03 May '23

alsa-project/alsa-utils issue #209 was edited from kfilipan: This is more of a feature request rather than an issue. When using `arecord` with `--max-file-time` and `--use-strftime`, one cannot get nanoseconds in the file name. This is however available in the e.g. `date` command `date +"%Y-%m-%d_%H-%M-%S.%N"` (`%N` gives nanoseconds). This would be useful for testing sound card recording time delays because having only seconds is not precise enough, e.g. it could take days or weeks for even slightly better sound cards to experience a second of delay. Thank you! Issue URL : https://github.com/alsa-project/alsa-utils/issues/209 Repository URL: https://github.com/alsa-project/alsa-utils

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[PATCH 0/6] ASoC/soundwire: qcom: correctly probe devices after link init
by Krzysztof Kozlowski 03 May '23

03 May '23

Hi, Dependencies ============ 1. ASoC codec: changes are independent, however they should rather come the same cycle as Soundwire changes, to avoid new warning and small delay. 2. Soundwire: changes (context) depend on: https://lore.kernel.org/r/20230209131336.18252-3-srinivas.kandagatla@linaro… https://lore.kernel.org/all/20230418095447.577001-1-krzysztof.kozlowski@lin… Problems solved =============== Soundwire devices are supposed to be kept in reset state (powered off) till their probe() or component bind() callbacks. However if they are already powered on, then they might enumerate before the master initializes bus in qcom_swrm_init() leading to occasional errors like: qcom-soundwire 6d30000.soundwire-controller: Qualcomm Soundwire controller v2.0.0 Registered wcd938x_codec audio-codec: bound sdw:0:0217:010d:00:4 (ops wcd938x_sdw_component_ops) wcd938x_codec audio-codec: bound sdw:0:0217:010d:00:3 (ops wcd938x_sdw_component_ops) qcom-soundwire 6ad0000.soundwire-controller: swrm_wait_for_wr_fifo_avail err write overflow The problem primarily lies in Qualcomm Soundwire controller probe() sequence: 1. request_threaded_irq() 2. sdw_bus_master_add() - which will cause probe() and component bind() of Soundwire devices, e.g. WCD938x codec drivers. Device drivers might already start accessing their registers. 3. qcom_swrm_init() - which initializes the link/bus and enables interrupts. Any access to device registers at (2) above, will fail because link/bus is not yet initialized. Cc: Patrick Lai <quic_plai(a)quicinc.com> Best regards, Krzysztof Dmitry Torokhov (1): ASoC: wcd938x: switch to using gpiod API Krzysztof Kozlowski (5): ASoC: codecs: wcd938x: Keep device in reset till bind ASoC: codecs: wcd938x: Check for enumeration before using TX device soundwire: qcom: drop unused struct qcom_swrm_ctrl members soudnwire: master: protect concurrecnt check for bus->md soundwire: qcom: do not probe devices before bus/link init drivers/soundwire/master.c | 7 ++- drivers/soundwire/qcom.c | 92 +++++++++++++++++++++++++++++--------- sound/soc/codecs/wcd938x.c | 44 +++++++++++------- 3 files changed, 107 insertions(+), 36 deletions(-) -- 2.34.1

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[Bug 217395] New: Internal Speakers do no work ALC245 HP envy x360 2-in-1 Laptop 13-bf0xxx
by bugzilla-daemon＠kernel.org 03 May '23

03 May '23

https://bugzilla.kernel.org/show_bug.cgi?id=217395 Bug ID: 217395 Summary: Internal Speakers do no work ALC245 HP envy x360 2-in-1 Laptop 13-bf0xxx Product: Platform Specific/Hardware Version: 2.5 Hardware: All OS: Linux Status: NEW Severity: normal Priority: P3 Component: x86-64 Assignee: platform_x86_64(a)kernel-bugs.osdl.org Reporter: sourabhsagar7601(a)gmail.com Regression: No Created attachment 304206 --> https://bugzilla.kernel.org/attachment.cgi?id=304206&action=edit Error logs from dmesg I have tried both Vanilla kernel and distro kernel. Still no sound from speaker Attaching output of a) uname -a, b) inxi -Fxz, c) journalctl -k | grep -Ei "ALSA|HDA|sof[-]|HDMI|snd[_-]|sournd|hda.codec|hda.intel" https://askubuntu.com/questions/1465753/ubuntu-23-04-no-speaker-sound-with-… -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.

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[PATCH] ALSA: docs: Fix code block indentation in ALSA driver example
by Bagas Sanjaya 03 May '23

03 May '23

Sphinx reports htmldocs warnings: Documentation/sound/kernel-api/writing-an-alsa-driver.rst:3997: WARNING: Literal block expected; none found. Documentation/sound/kernel-api/writing-an-alsa-driver.rst:4004: WARNING: Literal block expected; none found. Documentation/sound/kernel-api/writing-an-alsa-driver.rst:4009: WARNING: Unexpected indentation. Documentation/sound/kernel-api/writing-an-alsa-driver.rst:4035: WARNING: Literal block expected; none found. These are due to indentation of example driver snippets which is outside the code block scope. Fix these by indenting code blocks in question to the scope. Fixes: 4d421eebe1465d ("ALSA: docs: writing-an-alsa-driver.rst: polishing") Reported-by: kernel test robot <lkp(a)intel.com> Closes: https://lore.kernel.org/linux-doc/202305021822.4U6XOvGf-lkp@intel.com/ Signed-off-by: Bagas Sanjaya <bagasdotme(a)gmail.com> --- .../kernel-api/writing-an-alsa-driver.rst | 22 +++++++++---------- 1 file changed, 11 insertions(+), 11 deletions(-) diff --git a/Documentation/sound/kernel-api/writing-an-alsa-driver.rst b/Documentation/sound/kernel-api/writing-an-alsa-driver.rst index c0f97b5e424969..4335c98b3d828f 100644 --- a/Documentation/sound/kernel-api/writing-an-alsa-driver.rst +++ b/Documentation/sound/kernel-api/writing-an-alsa-driver.rst @@ -3994,21 +3994,21 @@ Driver with A Single Source File Suppose you have a file xyz.c. Add the following two lines:: - snd-xyz-objs := xyz.o - obj-$(CONFIG_SND_XYZ) += snd-xyz.o + snd-xyz-objs := xyz.o + obj-$(CONFIG_SND_XYZ) += snd-xyz.o 2. Create the Kconfig entry Add the new entry of Kconfig for your xyz driver:: - config SND_XYZ - tristate "Foobar XYZ" - depends on SND - select SND_PCM - help - Say Y here to include support for Foobar XYZ soundcard. - To compile this driver as a module, choose M here: - the module will be called snd-xyz. + config SND_XYZ + tristate "Foobar XYZ" + depends on SND + select SND_PCM + help + Say Y here to include support for Foobar XYZ soundcard. + To compile this driver as a module, choose M here: + the module will be called snd-xyz. The line ``select SND_PCM`` specifies that the driver xyz supports PCM. In addition to SND_PCM, the following components are supported for @@ -4032,7 +4032,7 @@ located in the new subdirectory, sound/pci/xyz. 1. Add a new directory (``sound/pci/xyz``) in ``sound/pci/Makefile`` as below:: - obj-$(CONFIG_SND) += sound/pci/xyz/ + obj-$(CONFIG_SND) += sound/pci/xyz/ 2. Under the directory ``sound/pci/xyz``, create a Makefile:: base-commit: 348551ddaf311c76b01cdcbaf61b6fef06a49144 -- An old man doll... just what I always wanted! - Clara

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[PATCH] ALSA: docs: Extend module parameters description
by Ivan Orlov 03 May '23

03 May '23

Common ALSA module parameters look a little bit confusing because of the description lacking, and it took me a while to understand the purpose of their existence. To figure it out I asked the question about them to the "alsa-devel" mailing list, and Takashi Iwai answered me with the text I appended to the ALSA documentation in this patch. These common module parameters aren't used a lot nowadays, but as I understand they are important for providing compatibility with some existing user-space apps. So in my opinion it is a good idea to document why we need them. Signed-off-by: Ivan Orlov <ivan.orlov0322(a)gmail.com> --- Documentation/sound/alsa-configuration.rst | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/Documentation/sound/alsa-configuration.rst b/Documentation/sound/alsa-configuration.rst index af71c68f1e4e..829c672d9fe6 100644 --- a/Documentation/sound/alsa-configuration.rst +++ b/Documentation/sound/alsa-configuration.rst @@ -133,6 +133,19 @@ enable enable card; Default: enabled, for PCI and ISA PnP cards +These options are used for either specifying the order of instances or +controlling enabling and disabling of each one of the devices if there +are multiple devices bound with the same driver. For example, there are +many machines which have two HD-audio controllers (one for HDMI/DP +audio and another for onboard analog). In most cases, the second one is +in primary usage, and people would like to assign it as the first +appearing card. They can do it by specifying "index=1,0" module +parameter, which will swap the assignment slots. + +Today, with the sound backend like PulseAudio and PipeWire which +supports dynamic configuration, it's of little use, but that was a +help for static configuration in the past. + Module snd-adlib ---------------- -- 2.34.1

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