From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 54FCBC77B7F for ; Fri, 5 May 2023 09:24:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231665AbjEEJYF (ORCPT ); Fri, 5 May 2023 05:24:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33730 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230398AbjEEJYA (ORCPT ); Fri, 5 May 2023 05:24:00 -0400 Received: from relay10.mail.gandi.net (relay10.mail.gandi.net [IPv6:2001:4b98:dc4:8::230]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 72D047EF3; Fri, 5 May 2023 02:23:57 -0700 (PDT) Received: from booty (unknown [77.244.183.192]) (Authenticated sender: luca.ceresoli@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id 05C59240006; Fri, 5 May 2023 09:23:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1683278636; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=mWElEqoC0tf6AE16wm3wb4hzf8ICo35KcifM6UnLMzo=; b=gAdUn58zRii8F5j9HadQN4CxZRzA5r+uSeedshZX4vU10xEvC3twC47IIhZGAeHGmyI9pF cKE/T0V/qJJFYy8MK1yIAFz6k8g1tDAP6ONhv3ehCthYYReSR0N6YS9KaU8j4EjJecS2VG Yl9C7rgu1/FzdL578HPrX8NMotO8E+BoGVP6k2dJN4cDbbSu6FhIHLmztuFORS3T1iCVee uZACtTPtRvIihqG3JL4yzO4LzF1xnAXMguHdK+pu2nMlNQe7GOBZngFbBgKTnBSzCBVSSm OWG/K8tre5GbMqejMgI4zh4rFKT9eng7izNuNpDzg1sNh4PT28JQtLPOwbhP6g== Date: Fri, 5 May 2023 11:23:51 +0200 From: Luca Ceresoli To: Francesco Dolcini Cc: devicetree@vger.kernel.org, festevam@gmail.com, gregkh@linuxfoundation.org, jun.li@nxp.com, kernel@pengutronix.de, linux-arm-kernel@lists.infradead.org, linux-imx@nxp.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, peter.chen@nxp.com, robh+dt@kernel.org, s.hauer@pengutronix.de, shawnguo@kernel.org, Krzysztof Kozlowski , francesco.dolcini@toradex.com Subject: Re: [PATCH v2 2/3] usb: chipidea: imx: support disabling runtime-pm Message-ID: <20230505112351.1c79f6b2@booty> In-Reply-To: References: <23672d66d229d3be4cc854ddf1462c3507f1c2fc.camel@toradex.com> <20230504162312.1506763-1-luca.ceresoli@bootlin.com> Organization: Bootlin X-Mailer: Claws Mail 4.0.0 (GTK+ 3.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello Francesco, On Thu, 4 May 2023 18:50:14 +0200 Francesco Dolcini wrote: > Hello Luca, > I guess your mail to Philippe bounced, let me try to answer since I am aware > of the issue here. > > On Thu, May 04, 2023 at 06:23:12PM +0200, Luca Ceresoli wrote: > > I found this thread after several hours spent in debugging why USB host is > > not detecting new devices on a custom board using the iMX6ULL Colibri > > SoM. > > > > My best workaround at the moment is: > We have the same workaround in our BSP since quite some time, see > https://git.toradex.com/cgit/meta-toradex-bsp-common.git/tree/recipes-kernel/linux/linux-toradex-mainline-git/0002-drivers-chipidea-disable-runtime-pm-for-imx6ul.patch > > > I haven't found any follow-up patches from you, so I'm wondering whether > > you have made any progress on this issue. > You can find the latest discussion on that regard here > https://lore.kernel.org/all/Y1vLpaxpc5WBCuGD@francesco-nb.int.toradex.com/ Thanks for this pointer! I have read the discussion and it was a bit confusing, especially about whether the hardware can work at all. Are you planning to continue on that work? I would be very glad to test on product based on the i.MX6ULL Colibri module I am currently working on. Best regards, Luca -- Luca Ceresoli, Bootlin Embedded Linux and Kernel engineering https://bootlin.com