[alsa-devel] USB Audio Interface / Denon MC7000 and MC8000 controller

[Tobias]

Alexander - here comes the dmesg output you are looking for:

    35.175855] usb 1-2: new high-speed USB device number 6 using xhci_hcd
[   35.196647] usb 1-2: New USB device found, idVendor=15e4, 
idProduct=8004, bcdDevice=11.10
[   35.196649] usb 1-2: New USB device strings: Mfr=1, Product=2, 
SerialNumber=3
[   35.196650] usb 1-2: Product: DENON DJ MC7000
[   35.196650] usb 1-2: Manufacturer: DENON DJ
[   35.196651] usb 1-2: SerialNumber: 201603
[   35.198291] usb 1-2: uac_clock_source_is_valid(): err: 1 ; data: 0
[   35.198292] usb 1-2: clock source 65 is not valid, cannot use
[   35.198370] usb 1-2: uac_clock_source_is_valid(): err: 1 ; data: 0
[   35.199052] usb 1-2: uac_clock_source_is_valid(): err: 1 ; data: 0
[   35.199053] usb 1-2: clock source 65 is not valid, cannot use
[   35.199132] usb 1-2: uac_clock_source_is_valid(): err: 1 ; data: 0
...
...
repeated several 100 times.

Hope this is useful data for you.

Cheers!
Tobias


Am 07.02.20 um 20:11 schrieb Alexander Tsoy:
> В Пт, 07/02/2020 в 19:49 +0100, Tobias пишет:
>> Dear Alexander - unfortunately the patch doesn't want to be applied.
> It seems I copied it from less with different tab width. The patch
> below should be OK.
>
>> $ patch -p1 < ../denon-4.patch
>> patching file sound/usb/clock.c
>> Hunk #1 FAILED at 187.
>> 1 out of 1 hunk FAILED -- saving rejects to file
>> sound/usb/clock.c.rej
>>
>> I guess it was not your intention only adding one line to
>> /sound/usb/clock.c. so what am I missing here?
> No, it was intentional. This patch just adds printing of some info I
> need in the following format:
>
> uac_clock_source_is_valid(): err: X ; data: X
>
>
> diff --git a/sound/usb/clock.c b/sound/usb/clock.c
> index 018b1ecb5404..65ee5c24c5d1 100644
> --- a/sound/usb/clock.c
> +++ b/sound/usb/clock.c
> @@ -187,6 +187,8 @@ static bool uac_clock_source_is_valid(struct snd_usb_audio *chip,
>   			      snd_usb_ctrl_intf(chip) | (source_id << 8),
>   			      &data, sizeof(data));
>   
> +	dev_info(&dev->dev, "%s(): err: %d ; data: %d\n", __func__, err, data);
> +
>   	if (err < 0) {
>   		dev_warn(&dev->dev,
>   			 "%s(): cannot get clock validity for id %d\n",
>