TC Electronic Studio Konnekt 48 is an application of combination of WaveFront Dice II STD and TC Applied Technologies (TCAT) TCD2210 (Dice Mini). The latter is on a board with BNC and optical interfaces, thus used for signal processing for word clock, S/PDIF and ADAT. This model doesn't support TCAT extended application protocol. For such devices, ALSA dice driver needs to have hard-coded parameters for stream formats.
This commit fixes stream format parameters for this model. Unfortunately, at sampling transmission frequencies over 48.0kHz, I confirmed that current ALSA dice driver doesn't drive the device appropriately to generate sounds (silence). I guess that this comes from timestamping quirk of Dice-based devices, which I reported.
[alsa-devel] Dice packet sequence quirk and ALSA firewire stack in Linux 4.6 http://mailman.alsa-project.org/pipermail/alsa-devel/2016-May/107715.html
$ cd linux-firewire-utils/src $ python2 crpp < /sys/bus/firewire/devices/fw1/config_rom ROM header and bus information block ----------------------------------------------------------------- 400 04044a26 bus_info_length 4, crc_length 4, crc 18982 404 31333934 bus_name "1394" 408 e0ff8112 irmc 1, cmc 1, isc 1, bmc 0, pmc 0, cyc_clk_acc 255, max_rec 8 (512), max_rom 1, gen 1, spd 2 (S400) 40c 00016604 company_id 000166 | 410 08a65810 device_id 0408a65810 | EUI-64 0001660408a65810
root directory ----------------------------------------------------------------- 414 00062ab9 directory_length 6, crc 10937 418 03000166 vendor 41c 8100000a --> descriptor leaf at 444 420 17000022 model 424 8100000f --> descriptor leaf at 460 428 0c0087c0 node capabilities per IEEE 1394 42c d1000001 --> unit directory at 430
unit directory at 430 ----------------------------------------------------------------- 430 0004d5c5 directory_length 4, crc 54725 434 12000166 specifier id 438 13000001 version 43c 17000022 model 440 8100000f --> descriptor leaf at 47c
descriptor leaf at 444 ----------------------------------------------------------------- 444 0006c490 leaf_length 6, crc 50320 448 00000000 textual descriptor 44c 00000000 minimal ASCII 450 54432045 "TC E" 454 6c656374 "lect" 458 726f6e69 "roni" 45c 63000000 "c"
descriptor leaf at 460 ----------------------------------------------------------------- 460 0006e08e leaf_length 6, crc 57486 464 00000000 textual descriptor 468 00000000 minimal ASCII 46c 53747564 "Stud" 470 696f4b6f "ioKo" 474 6e6e656b "nnek" 478 74343800 "t48"
descriptor leaf at 47c ----------------------------------------------------------------- 47c 0006e08e leaf_length 6, crc 57486 480 00000000 textual descriptor 484 00000000 minimal ASCII 488 53747564 "Stud" 48c 696f4b6f "ioKo" 490 6e6e656b "nnek" 494 74343800 "t48"
Signed-off-by: Takashi Sakamoto o-takashi@sakamocchi.jp --- sound/firewire/dice/dice-tcelectronic.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sound/firewire/dice/dice-tcelectronic.c b/sound/firewire/dice/dice-tcelectronic.c index f9e0072deb81..a4cbe2da8c15 100644 --- a/sound/firewire/dice/dice-tcelectronic.c +++ b/sound/firewire/dice/dice-tcelectronic.c @@ -44,8 +44,8 @@ static const struct dice_tc_spec konnekt_live = { };
static const struct dice_tc_spec studio_konnekt_48 = { - .tx_pcm_chs = {{16, 16, 16}, {16, 16, 0} }, - .rx_pcm_chs = {{16, 16, 16}, {16, 16, 0} }, + .tx_pcm_chs = {{16, 16, 8}, {16, 16, 7} }, + .rx_pcm_chs = {{16, 16, 8}, {14, 14, 7} }, .has_midi = true, };