From patchwork Wed Jul 1 09:31:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Grzeschik X-Patchwork-Id: 11635913 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8E82F739 for ; Wed, 1 Jul 2020 09:32:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7618B207CD for ; Wed, 1 Jul 2020 09:32:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729469AbgGAJcO (ORCPT ); Wed, 1 Jul 2020 05:32:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60876 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729287AbgGAJcN (ORCPT ); Wed, 1 Jul 2020 05:32:13 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2B976C03E979 for ; Wed, 1 Jul 2020 02:32:13 -0700 (PDT) Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1jqZ6B-0003Pn-LQ; Wed, 01 Jul 2020 11:32:11 +0200 Received: from mgr by dude.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1jqZ6A-0005jN-Jr; Wed, 01 Jul 2020 11:32:10 +0200 From: Michael Grzeschik To: linux-usb@vger.kernel.org Cc: Thinh.Nguyen@synopsys.com, gregkh@linuxfoundation.org, kernel@pengutronix.de, balbi@kernel.org Subject: [PATCH v4 0/3] usb: dwc3: gadget: improve isoc handling Date: Wed, 1 Jul 2020 11:31:35 +0200 Message-Id: <20200701093137.19485-1-m.grzeschik@pengutronix.de> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: mgr@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-usb@vger.kernel.org Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org These three patches improve the isoc handling and make the dwc3 gadget driver somewhat usable with the UVC gadget for isochronous endpoints. The first patch makes starting isochronous transfers more reliable. I think it's more less, what Thinh suggested some time ago[1]. It's still not perfect because the first request must still be queued within 2 seconds but it's a lot better than the current situation. The second patch makes it possible to have gaps in the data stream. The UVC gadget relies on such behaviour. Without this, using the UVC gadget with a live stream stops after the first frame that needs more time to be scheduled. [1] https://marc.info/?l=linux-usb&m=156088170723824&w=4 Michael Grzeschik (2): usb: dwc3: gadget: add frame number mask usb: dwc3: gadget: when the started list is empty stop the active xfer Michael Olbrich (1): usb: dwc3: gadget: make starting isoc transfers more robust drivers/usb/dwc3/gadget.c | 30 +++++++++++++++++++++++++++--- drivers/usb/dwc3/gadget.h | 2 ++ 2 files changed, 29 insertions(+), 3 deletions(-)