Messages in this thread Patch in this message | | | From | Jiri Slaby <> | Subject | [PATCH 3.12 029/176] ALSA: usb-audio: extend KEF X300A FU 10 tweak to Arcam rPAC | Date | Wed, 28 Jan 2015 15:27:39 +0100 |
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From: Jiri Jaburek <jjaburek@redhat.com>
3.12-stable review patch. If anyone has any objections, please let me know.
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commit d70a1b9893f820fdbcdffac408c909c50f2e6b43 upstream.
The Arcam rPAC seems to have the same problem - whenever anything (alsamixer, udevd, 3.9+ kernel from 60af3d037eb8c, ..) attempts to access mixer / control interface of the card, the firmware "locks up" the entire device, resulting in SNDRV_PCM_IOCTL_HW_PARAMS failed (-5): Input/output error from alsa-lib.
Other operating systems can somehow read the mixer (there seems to be playback volume/mute), but any manipulation is ignored by the device (which has hardware volume controls).
Signed-off-by: Jiri Jaburek <jjaburek@redhat.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jiri Slaby <jslaby@suse.cz> --- sound/usb/mixer_maps.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/sound/usb/mixer_maps.c b/sound/usb/mixer_maps.c index 0339d464791a..4df31b0f94a3 100644 --- a/sound/usb/mixer_maps.c +++ b/sound/usb/mixer_maps.c @@ -322,8 +322,11 @@ static struct usbmix_name_map hercules_usb51_map[] = { { 0 } /* terminator */ }; -static const struct usbmix_name_map kef_x300a_map[] = { - { 10, NULL }, /* firmware locks up (?) when we try to access this FU */ +/* some (all?) SCMS USB3318 devices are affected by a firmware lock up + * when anything attempts to access FU 10 (control) + */ +static const struct usbmix_name_map scms_usb3318_map[] = { + { 10, NULL }, { 0 } }; @@ -415,8 +418,14 @@ static struct usbmix_ctl_map usbmix_ctl_maps[] = { .map = ebox44_map, }, { + /* KEF X300A */ .id = USB_ID(0x27ac, 0x1000), - .map = kef_x300a_map, + .map = scms_usb3318_map, + }, + { + /* Arcam rPAC */ + .id = USB_ID(0x25c4, 0x0003), + .map = scms_usb3318_map, }, { 0 } /* terminator */ }; -- 2.2.2
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