[alsa-devel] [PATCH] ALSA: usb-audio: update quirk for B&W PX to remove microphone
A quirk in snd-usb-audio was added to automate setting sample rate to 4800k and remove the previously exposed nonfunctional microphone for the Bowers & Wilkins PX: commit 240a8af929c7c57dcde28682725b29cf8474e8e5 https://lore.kernel.org/patchwork/patch/919689/
However the headphones where updated shortly after that to remove the unintentional microphone functionality. I guess because of this the headphones now crash when connecting them via USB while the quirk is active. Dmesg:
snd-usb-audio: probe of 2-3:1.0 failed with error -22 usb 2-3: 2:1: cannot get min/max values for control 2 (id 2)
This patch removes the microfone and allows the headphones to connect and work out of the box. It is based on the current mainline kernel and successfully applied an tested on my machine (4.18.10.arch1-1).
Signed-off-by: Nicolas Huaman nicolas@herochao.de --- sound/usb/quirks-table.h | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h index 08aa78007020..849953e5775c 100644 --- a/sound/usb/quirks-table.h +++ b/sound/usb/quirks-table.h @@ -3346,19 +3346,14 @@ AU0828_DEVICE(0x2040, 0x7270, "Hauppauge", "HVR-950Q"), .ifnum = 0, .type = QUIRK_AUDIO_STANDARD_MIXER, }, - /* Capture */ - { - .ifnum = 1, - .type = QUIRK_IGNORE_INTERFACE, - }, /* Playback */ { - .ifnum = 2, + .ifnum = 1, .type = QUIRK_AUDIO_FIXED_ENDPOINT, .data = &(const struct audioformat) { .formats = SNDRV_PCM_FMTBIT_S16_LE, .channels = 2, - .iface = 2, + .iface = 1, .altsetting = 1, .altset_idx = 1, .attributes = UAC_EP_CS_ATTR_FILL_MAX |
On Thu, 04 Oct 2018 16:42:05 +0200, Nicolas Huaman wrote:
A quirk in snd-usb-audio was added to automate setting sample rate to 4800k and remove the previously exposed nonfunctional microphone for the Bowers & Wilkins PX: commit 240a8af929c7c57dcde28682725b29cf8474e8e5 https://lore.kernel.org/patchwork/patch/919689/
However the headphones where updated shortly after that to remove the unintentional microphone functionality. I guess because of this the headphones now crash when connecting them via USB while the quirk is active. Dmesg:
snd-usb-audio: probe of 2-3:1.0 failed with error -22 usb 2-3: 2:1: cannot get min/max values for control 2 (id 2)
This patch removes the microfone and allows the headphones to connect and work out of the box. It is based on the current mainline kernel and successfully applied an tested on my machine (4.18.10.arch1-1).
Signed-off-by: Nicolas Huaman nicolas@herochao.de
Thanks, that looks much better now, and I can apply it.
But just to be sure: is any quirk required after the firmware update on this device at all? What happens if you remove the whole quirk?
If this modified quirk is still mandatory, I'll happily apply the patch.
thanks,
Takashi
Hey, Thanks for the quick response
Am 04.10.18 um 22:55 CEST schrieb Takashi Iwai:
On Thu, 04 Oct 2018 16:42:05 +0200, Nicolas Huaman wrote:
A quirk in snd-usb-audio was added to automate setting sample rate to 4800k and remove the previously exposed nonfunctional microphone for the Bowers & Wilkins PX: commit 240a8af929c7c57dcde28682725b29cf8474e8e5 https://lore.kernel.org/patchwork/patch/919689/
However the headphones where updated shortly after that to remove the unintentional microphone functionality. I guess because of this the headphones now crash when connecting them via USB while the quirk is active. Dmesg:
snd-usb-audio: probe of 2-3:1.0 failed with error -22 usb 2-3: 2:1: cannot get min/max values for control 2 (id 2)
This patch removes the microfone and allows the headphones to connect and work out of the box. It is based on the current mainline kernel and successfully applied an tested on my machine (4.18.10.arch1-1).
Signed-off-by: Nicolas Huaman nicolas@herochao.de
Thanks, that looks much better now, and I can apply it.
But just to be sure: is any quirk required after the firmware update on this device at all? What happens if you remove the whole quirk?
Yes, the sample-rate problem is still present. I initially tried disabling the quirk, but then I needed to set the default sample rate of pulse to 48k again for the headphones to play sound, which is why I wanted to find out how to fix it completely.
This problem doesn't appear on windows (I think windows defaults to 48k?). Perhaps that's the reason why it wasn't patched in a firmware update up until now.
If this modified quirk is still mandatory, I'll happily apply the patch.
thanks,
Takashi
The headphones I got already had the fixed firmware version, but even older headphones can be updated using Android, IOS or Windows.
My Fix corrects detection for headphones with all Firmware after February 2018, so I think this quirk probably presents the best solution for now, especially since the nonfunctional microphone of older Firmware appeared on all platforms.
Thank you for your time, the help and feedback!
Best Regards,
Nicolas
On Fri, 05 Oct 2018 00:31:47 +0200, Nicolas Herochao wrote:
Hey, Thanks for the quick response
Am 04.10.18 um 22:55 CEST schrieb Takashi Iwai:
On Thu, 04 Oct 2018 16:42:05 +0200, Nicolas Huaman wrote:
A quirk in snd-usb-audio was added to automate setting sample rate to 4800k and remove the previously exposed nonfunctional microphone for the Bowers & Wilkins PX: commit 240a8af929c7c57dcde28682725b29cf8474e8e5 https://lore.kernel.org/patchwork/patch/919689/
However the headphones where updated shortly after that to remove the unintentional microphone functionality. I guess because of this the headphones now crash when connecting them via USB while the quirk is active. Dmesg:
snd-usb-audio: probe of 2-3:1.0 failed with error -22 usb 2-3: 2:1: cannot get min/max values for control 2 (id 2)
This patch removes the microfone and allows the headphones to connect and work out of the box. It is based on the current mainline kernel and successfully applied an tested on my machine (4.18.10.arch1-1).
Signed-off-by: Nicolas Huaman nicolas@herochao.de
Thanks, that looks much better now, and I can apply it.
But just to be sure: is any quirk required after the firmware update on this device at all? What happens if you remove the whole quirk?
Yes, the sample-rate problem is still present. I initially tried disabling the quirk, but then I needed to set the default sample rate of pulse to 48k again for the headphones to play sound, which is why I wanted to find out how to fix it completely.
This problem doesn't appear on windows (I think windows defaults to 48k?). Perhaps that's the reason why it wasn't patched in a firmware update up until now.
If this modified quirk is still mandatory, I'll happily apply the patch.
thanks,
Takashi
The headphones I got already had the fixed firmware version, but even older headphones can be updated using Android, IOS or Windows.
My Fix corrects detection for headphones with all Firmware after February 2018, so I think this quirk probably presents the best solution for now, especially since the nonfunctional microphone of older Firmware appeared on all platforms.
Fair enough, I merged the patch now. Thanks!
Takashi
participants (3)
-
Nicolas Herochao -
Nicolas Huaman
-
Takashi Iwai