On Sun, 03 Jan 2021 18:09:41 +0100, František Kučera wrote: > > Dne 23. 11. 20 v 9:53 Takashi Iwai napsal(a): > > Currently snd_usb_endpoint objects are created at first when the > > substream is opened and tries to assign the endpoints corresponding to > > the matching audioformat. But since basically the all endpoints have > > been already parsed and the information have been obtained, we may > > create the endpoint objects statically at the init phase. It's easier > > to manage for the implicit fb case, for example. > > > > This patch changes the endpoint object management and lets the parser > > to create the all endpoint objects. > > > > This change shouldn't bring any functional changes. > > The Pioneer DJ DJM-250MK2 (implemented in 73d8c9408434, 14335d8b9e1a, cdc01a1558de) stopped working. > > After bisecting, it seems that it worked in 5fd255f4fe97 and stopped working in 54cb31901b83. > > The arecord says: set_params:1407: Unable to install hw params > > And even playback is impossible in this version. But there is no error in the log. However in later versions (e.g. eda809aef534) I found errors in kern.log: > > usb 1-3: Cannot find EP 0x1 to open > > usb 1-3: Cannot find EP 0x82 to open > > (each repeats 20 or more times, seems to be in pcm.c in subs->data_endpoint = snd_usb_endpoint_open(chip, fmt, hw_params, false);) > > Could you please check it? I am not sure whether it should be fixed in the DJM-250MK2 specific code or here. Could you give lsusb -v output as well as /proc/asound/card*/usbmixer and stream* files? The proc files are at best from both older and new kernels. thanks, Takashi
