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[alsa-devel] [Question] Can I open a substream in kernel space without attach to a file pointer?
by Bryan Wu 12 Dec '08

12 Dec '08

Hi Takashi, I am developing a USB gadget driver compliant to USB Audio Class Spec 2.0. So I want to open a PCM substream and do some playback of capture, then close them? I found snd_pcm_open_substream() is for opening a substream and attach it to a file. But in my application, there is no need to open a file before opening a substream. - Is there any interface for me to open a substream in kernel space without attach to a file? - How to playback and capture in kernel space, use snd_pcm_lib_write and snd_pcm_lib_read? - How to get the snd_pcm_hardware struct from low level driver, because I have to get the hardware configuration of the snd pcm device? And I am reading the code of OSS emulator in ALSA. It provides some info about the kernel space sound card programming. Thanks a lot -Bryan

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[alsa-devel] Macbook Air 2.1 - No sound on main speakers
by Klaus Schulz 12 Dec '08

12 Dec '08

Hi there. Fowarded from my "Ubuntu manual upgrade thread": Another problem with Realtek. No sound on mainspeakers on MACBOOK Air 2.1. A known issue?? See also the different aplay and codec IDs! Klaus Quote: ----------------------- No sound on main internal speaker. Headphones do work fine. Macbook Air 2,1 Ubuntu Intrepid server Kernel 2.6.27-9 Alsa Driver version 1.0.18a GIT snapshot from 12/4/08 Sound card nVidia MCP79 (device id 10de:0ac0) aplay -l: ALC885 /proc/asound/card0/codec#0 CODEC ALC889a lspci -nv 00:08.0 0403: 10de:0ac0 (rev b1) Subsystem: 10de:cb79 ------------------------

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[alsa-devel] HP Pavillion TX2000z - Headphonejack not working
by Klaus Schulz 12 Dec '08

12 Dec '08

Hi folks. Another problem now with HP and realtek AC861VD. The headphone-jack is not working. Known issue? THX \Klaus QUOTE: -------------------------- drivers 1.0.18a HP Pavillion tx2000z, Realtek AC861VD, Alsa version 1.0.18a. Running Ubuntu Studio Intrepid 8.10 Kernel 2.6.27-9-generic options snd-hda-intel model=hp kqian@kkqian:~$ aplay -l **** List of PLAYBACK Hardware Devices **** card 0: NVidia [HDA NVidia], device 0: ALC861VD Analog [ALC861VD Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: NVidia [HDA NVidia], device 1: ALC861VD Digital [ALC861VD Digital] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: NVidia [HDA NVidia], device 6: Si3054 Modem [Si3054 Modem] Subdevices: 1/1 Subdevice #0: subdevice #0 kqian@kkqian:~$ cat /proc/asound/card0/codec#* | grep Codec Codec: Realtek ALC861-VD Codec: Motorola Si3054 Oh, I should also add, headphones do not show up in volume control. I have checked the switches, as well as the main interface. The only things that are there are: Master, PCM, Front, Front Mic, Front Mic Boost, Microphone, Mic Boost, Speaker, Capture, IEC958, IEC958 Default PCM, Caller ID, Off-hook, Input Source, All of them are checked, and none of them are muted.

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[alsa-devel] More notes on HD-audio driver
by Takashi Iwai 11 Dec '08

11 Dec '08

Hi, per popular demand, I wrote a brief document more about HD-audio driver. It's now found in sound git tree as Documentation/sound/alsa/HD-Audio.txt. The git tree is: git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6.git You can get the text from web: http://git.kernel.org/?p=linux/kernel/git/tiwai/sound-2.6.git;a=blob_plain;… A PDF file is found at: http://ftp.kernel.org/pub/linux/kernel/people/tiwai/docs/HD-Audio.pdf Comments, corrections and additions are appreciated. thanks, Takashi

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[alsa-devel] [PATCH 0/2] ASoC updates
by Mark Brown 11 Dec '08

11 Dec '08

The following changes since commit 6de45d5d776d2a7e7a9adc8ea49d37fe1bd45fb2: Takashi Iwai (1): ALSA: ASoC - Fix DAI registration in s3c2443-ac97.c are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound-2.6.git for-tiwai Mark Brown (1): ASoC: Fix variable name for Blackfin I2S DAI Stanley.Miao (1): ASoC: TWL4030: hands-free start-up sequence. sound/soc/blackfin/bf5xx-i2s.c | 4 ++-- sound/soc/codecs/twl4030.c | 34 ++++++++++++++++++++++++++++++---- sound/soc/codecs/twl4030.h | 6 ++++++ 3 files changed, 38 insertions(+), 6 deletions(-)

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[alsa-devel] [PATCH] TWL4030: Add event callback to enable hands-free.
by Stanley.Miao 11 Dec '08

11 Dec '08

A special sequence is required to enable hands-free on TWL4030. Signed-off-by: Stanley.Miao <stanley.miao(a)windriver.com> --- sound/soc/codecs/twl4030.c | 33 +++++++++++++++++++++++++++++---- sound/soc/codecs/twl4030.h | 6 ++++++ 2 files changed, 35 insertions(+), 4 deletions(-) diff --git a/sound/soc/codecs/twl4030.c b/sound/soc/codecs/twl4030.c index 71ab534..86d6553 100644 --- a/sound/soc/codecs/twl4030.c +++ b/sound/soc/codecs/twl4030.c @@ -325,6 +325,29 @@ static int outmixer_event(struct snd_soc_dapm_widget *w, return ret; } +static int handsfree_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, int event) +{ + struct soc_enum *e = (struct soc_enum *)w->kcontrols->private_value; + unsigned char hs_ctl; + + + hs_ctl = twl4030_read_reg_cache(w->codec, e->reg); + + if (hs_ctl & TWL4030_HF_CTL_REF_EN) { + hs_ctl |= TWL4030_HF_CTL_RAMP_EN; + twl4030_write(w->codec, e->reg, hs_ctl); + hs_ctl |= TWL4030_HF_CTL_LOOP_EN; + twl4030_write(w->codec, e->reg, hs_ctl); + hs_ctl |= TWL4030_HF_CTL_HB_EN; + twl4030_write(w->codec, e->reg, hs_ctl); + } else { + twl4030_write(w->codec, e->reg, 0x0); + } + + return 0; +} + /* * Some of the gain controls in TWL (mostly those which are associated with * the outputs) are implemented in an interesting way: @@ -807,10 +830,12 @@ static const struct snd_soc_dapm_widget twl4030_dapm_widgets[] = { SND_SOC_DAPM_MUX("CarkitR Mux", SND_SOC_NOPM, 0, 0, &twl4030_dapm_carkitr_control), /* HandsfreeL/R */ - SND_SOC_DAPM_MUX("HandsfreeL Mux", TWL4030_REG_HFL_CTL, 5, 0, - &twl4030_dapm_handsfreel_control), - SND_SOC_DAPM_MUX("HandsfreeR Mux", TWL4030_REG_HFR_CTL, 5, 0, - &twl4030_dapm_handsfreer_control), + SND_SOC_DAPM_MUX_E("HandsfreeL Mux", TWL4030_REG_HFL_CTL, 5, 0, + &twl4030_dapm_handsfreel_control, handsfree_event, + SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD), + SND_SOC_DAPM_MUX_E("HandsfreeR Mux", TWL4030_REG_HFR_CTL, 5, 0, + &twl4030_dapm_handsfreer_control, handsfree_event, + SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD), SND_SOC_DAPM_ADC("ADCL", "Left Capture", SND_SOC_NOPM, 0, 0), SND_SOC_DAPM_ADC("ADCR", "Right Capture", SND_SOC_NOPM, 0, 0), diff --git a/sound/soc/codecs/twl4030.h b/sound/soc/codecs/twl4030.h index a2065d4..54615c7 100644 --- a/sound/soc/codecs/twl4030.h +++ b/sound/soc/codecs/twl4030.h @@ -191,6 +191,12 @@ #define TWL4030_RAMP_DELAY_2581MS 0x1C #define TWL4030_RAMP_EN 0x02 +/* HFL_CTL (0x29, 0x2A) Fields */ +#define TWL4030_HF_CTL_HB_EN 0x04 +#define TWL4030_HF_CTL_LOOP_EN 0x08 +#define TWL4030_HF_CTL_RAMP_EN 0x10 +#define TWL4030_HF_CTL_REF_EN 0x20 + /* APLL_CTL (0x3A) Fields */ #define TWL4030_APLL_EN 0x10 -- 1.5.6.3

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[alsa-devel] ASoC: asound.conf
by naveen krishna ch 11 Dec '08

11 Dec '08

Hi all, I have a custom built ASoC CODEC driver for twl4030. I am integrating my kernel (ASoC driver) with the application. The application expects a /etc/asound.conf file is there any utility to build or restore the asound.conf for my ASoC driver. I have checked the "alsactl" which can give me the state/controls information. Do i need to make a asound.conf file.If so, can any one help my with some information (a sample asound.conf) with details of the driver in it. Sorry, if this the wrong place to raise this issue. -- Thanks, (: Naveen Krishna Ch :)

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[alsa-devel] ASoC: asound.conf
by naveen krishna ch 11 Dec '08

11 Dec '08

Hi all, I have a custom built ASoC CODEC driver for twl4030. I am integrating my kernel (ASoC driver) with the application. The application expects a /etc/asound.conf file is there any utility to build or restore the asound.conf for my ASoC driver. I have checked the "alsactl" which can give me the state/controls information. Do i need to make a asound.conf file.If so, can any one help my with some information (a sample asound.conf) with details of the driver in it. Sorry, if this the wrong place to raise this issue. -- Thanks, (: Naveen Krishna Ch :)

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[alsa-devel] 2.6.26.[6|7]-rt11, alsa rawmidi, seq hang
by Fernando Lopez-Lezcano 11 Dec '08

11 Dec '08

(starting a new thread with the hope of being more precise after a lot of testing and rebooting) I'm seeing a realtime patch related hard hang in the kernel alsa subsystem (MIDI input/output). In a nutshell: - alsa rawmidi works (ie: "rawmidi -v -i hw:0" outputs a stream of messages when pointed to a midi capable card that has an external keyboard connected). - the alsa sequencer interface works (ie: aplaymidi connected to aseqdump transfers data just fine). - BOTH combined do NOT work (ie: use aconnect to connect the port that corresponds to the external midi interface to aseqdump: aseqdump hangs forever after transferring the first message and the only way out is a reboot). Just tested this on 2.6.26.7 + rt11, Gina3G soundcard with an external MIDI keyboard sending messages. This is not specific to the Gina card, I have tested also USB midi interfaces and an RME hdsp card with a Multiface interface. 2.6.24.7 + rt21 works fine on the same hardware combinations. The standard Fedora 9 2.6.26.x kernel works fine as well. I'm attaching the kernel configuration for the kernel I'm currently testing plus a dmesg dump of the whole boot process (rt kernel hackers can find there some additional sleeping in wrong context warning messages there), including the output of a "echo t >/proc/sysrq-trigger" that should show where aseqdump currently hangs (or so I think). Hopefully this will narrow the area affected enough so that a solution can be found or more debugging info can be requested. Currently 2.6.26.x-rtx is unusable for musical purposes (at least when you have to interact with external midi controllers). Thanks for any help... -- Fernando

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Re: [alsa-devel] More notes on HD-audio driver
by kls.schlz＠googlemail.com 11 Dec '08

11 Dec '08

If you prepare a Wiki for the HD-Audio, don't forget to merge somehow ALSA-Configuration.txt. IMO this goes together. On Dec 11, 2008 7:24am, Takashi Iwai <tiwai(a)suse.de> wrote: > At Wed, 10 Dec 2008 14:45:52 -0700, > > stan wrote: > > > > > > Takashi Iwai wrote: > > > > Hi, > > > > > > > > per popular demand, I wrote a brief document more about HD-audio driver. > > > > It's now found in sound git tree as Documentation/sound/alsa/HD-Audio.txt. > > > > The git tree is: > > > > git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6.git > > > > > > > > You can get the text from web: > > > > http://git.kernel.org/?p=linux/kernel/git/tiwai/sound-2.6.git;a=blob_plain;… > > > > > > > > A PDF file is found at: > > > > http://ftp.kernel.org/pub/linux/kernel/people/tiwai/docs/HD-Audio.pdf > > > > > > Thank you for this. I found it informative and helpful. > > > > > > Maybe it could be placed on the wiki or sent to the > > > alsa-user list once a month as "how to troubleshoot hd audio"? > > > > Putting Wiki is a good idea. I'm not sure whether it'd be better to > > put the text into Wiki or to put a link to the above URL, though... > > > > > > Takashi > > _______________________________________________ > > Alsa-devel mailing list > > Alsa-devel(a)alsa-project.org > > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel >

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