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From: Ruslan Bilovol <ruslan.bilovol@gmail.com>
To: Pavel Hofman <pavel.hofman@ivitera.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>,
	Glenn Schmottlach <gschmottlach@gmail.com>,
	Peter Chen <peter.chen@nxp.com>,
	"balbi@kernel.org" <balbi@kernel.org>,
	"linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>
Subject: Re: [PATCH 0/3] UAC2 Gadget: feedback endpoint support
Date: Fri, 4 Dec 2020 16:39:54 +0200	[thread overview]
Message-ID: <CAB=otbS0RdXyLEHrkHXWZN+S-CKwdBONifrH11hiAf-3SL9cSQ@mail.gmail.com> (raw)
In-Reply-To: <8bf995b1-7b95-4c79-fbe8-275f29716c0e@ivitera.com>

On Thu, Nov 26, 2020 at 3:44 PM Pavel Hofman <pavel.hofman@ivitera.com> wrote:
>
> Dne 26. 11. 20 v 14:16 Jerome Brunet napsal(a):
> >
> >> Maximum data rates that I used were (AFAIR) 8 channel 192kHz/32bit,
> >> but there is another issue with high data rate if someone uses so many
> >> channels, very high sampling frequency or sample size that data can't
> >> fit into allowed (by USB spec) max packet size of endpoint. In this case
> >> need to decrease bInterval of endpoint.
>
> Should anyone test the patches with RPi4 dwc2 as the gadget, please note
> the recently accepted patch
> https://patchwork.kernel.org/project/linux-usb/patch/e9e7d070-593c-122f-3a5c-2435bb147ab2@ivitera.com/
> which allows using full 1024 bytes maxpacketsize on EP OUT. It is not an
> enumeration issue, but the old (= existing) RX FIFO size drops data with
> packet sizes above 960 bytes.

Thanks for bringing this to our attention. Does it affect RPi 3 as well?
I'm going to test feedback feature on this board

Regards,
Ruslan

  reply	other threads:[~2020-12-04 14:41 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-08  0:18 [PATCH 0/3] UAC2 Gadget: feedback endpoint support Ruslan Bilovol
2020-11-08  0:18 ` [PATCH 1/3] usb: gadget: f_uac2/u_audio: add " Ruslan Bilovol
2020-11-11  9:26   ` Peter Chen
2020-11-12 22:41     ` Ruslan Bilovol
2020-11-08  0:18 ` [PATCH 2/3] usb: gadget: f_uac2: add adaptive sync support for capture Ruslan Bilovol
2020-11-11  9:18   ` Peter Chen
2020-11-12 22:39     ` Ruslan Bilovol
2020-11-26 11:13   ` Jerome Brunet
2020-12-04 14:03     ` Ruslan Bilovol
2020-11-08  0:18 ` [PATCH 3/3] usb: gadget: u_audio: add real feedback implementation Ruslan Bilovol
2020-11-09  8:24   ` Pavel Hofman
2020-11-09  8:25     ` Pavel Hofman
2020-11-12 11:26     ` Pavel Hofman
2020-11-11  9:30 ` [PATCH 0/3] UAC2 Gadget: feedback endpoint support Peter Chen
2020-11-12 23:20   ` Ruslan Bilovol
2020-11-13 15:35     ` Glenn Schmottlach
2020-11-22 19:51       ` Ruslan Bilovol
2020-11-25 19:28         ` Glenn Schmottlach
2020-11-28 23:26           ` Ruslan Bilovol
2020-12-01 21:43             ` Glenn Schmottlach
2020-12-02 22:04               ` Glenn Schmottlach
2020-12-03 10:09                 ` Peter Chen
2020-12-03 22:07                   ` Glenn Schmottlach
2020-12-10 12:59                   ` Ruslan Bilovol
2020-12-11  7:22                     ` Peter Chen
2020-12-10 12:46               ` Ruslan Bilovol
2020-11-26 13:16         ` Jerome Brunet
2020-11-26 13:44           ` Pavel Hofman
2020-12-04 14:39             ` Ruslan Bilovol [this message]
2020-12-04 18:08               ` Pavel Hofman
2020-12-04 14:35           ` Ruslan Bilovol
2020-11-12 20:42 Glenn Schmottlach

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