From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753529AbaIYPOO (ORCPT ); Thu, 25 Sep 2014 11:14:14 -0400 Received: from www.linutronix.de ([62.245.132.108]:34176 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751981AbaIYPOM (ORCPT ); Thu, 25 Sep 2014 11:14:12 -0400 Date: Thu, 25 Sep 2014 17:14:03 +0200 From: Sebastian Andrzej Siewior To: Frans Klaver Cc: Heikki Krogerus , Peter Hurley , tony@atomide.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, balbi@ti.com, linux-serial@vger.kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Alan Cox Subject: Re: [PATCH 09/16] tty: serial: 8250_dma: Add a TX trigger workaround for AM33xx Message-ID: <20140925151403.GH19396@linutronix.de> References: <5411C810.7070906@linutronix.de> <2cf997d9-e7de-465b-915d-3a0a5e7b95f7@email.android.com> <54129F6C.7040508@linutronix.de> <20140912094010.GE28458@ci00147.xsens-tech.local> <5412C21A.8020203@linutronix.de> <20140912102816.GF28458@ci00147.xsens-tech.local> <541716DC.9020904@linutronix.de> <20140917102812.GA20438@ci00147.xsens-tech.local> <20140921204100.GA10111@linutronix.de> <20140922092853.GH20438@ci00147.xsens-tech.local> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20140922092853.GH20438@ci00147.xsens-tech.local> X-Key-Id: 97C4700B X-Key-Fingerprint: 09E2 D1F3 9A3A FF13 C3D3 961C 0688 1C1E 97C4 700B User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Frans Klaver | 2014-09-22 11:28:54 [+0200]: >I guess then we'd still have to answer the question why the yocto build >calls set_termios() so often, but that's not on you then. Did you notice >it even changing settings? We might want to fix this even if the kernel >should be able to cope. could you please test uart_v10_pre3? I dropped a few register sets and delayed the register update until TX-DMA is complete. I am traveling currently and have only my boneblack and it passes my limited testing. If it solves your problems, too then I would address Heikki's latest comments and prepare the final v10 (and I hope I didn't break beagle board in between). >Thanks again, >Frans Sebastian From mboxrd@z Thu Jan 1 00:00:00 1970 From: bigeasy@linutronix.de (Sebastian Andrzej Siewior) Date: Thu, 25 Sep 2014 17:14:03 +0200 Subject: [PATCH 09/16] tty: serial: 8250_dma: Add a TX trigger workaround for AM33xx In-Reply-To: <20140922092853.GH20438@ci00147.xsens-tech.local> References: <5411C810.7070906@linutronix.de> <2cf997d9-e7de-465b-915d-3a0a5e7b95f7@email.android.com> <54129F6C.7040508@linutronix.de> <20140912094010.GE28458@ci00147.xsens-tech.local> <5412C21A.8020203@linutronix.de> <20140912102816.GF28458@ci00147.xsens-tech.local> <541716DC.9020904@linutronix.de> <20140917102812.GA20438@ci00147.xsens-tech.local> <20140921204100.GA10111@linutronix.de> <20140922092853.GH20438@ci00147.xsens-tech.local> Message-ID: <20140925151403.GH19396@linutronix.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org * Frans Klaver | 2014-09-22 11:28:54 [+0200]: >I guess then we'd still have to answer the question why the yocto build >calls set_termios() so often, but that's not on you then. Did you notice >it even changing settings? We might want to fix this even if the kernel >should be able to cope. could you please test uart_v10_pre3? I dropped a few register sets and delayed the register update until TX-DMA is complete. I am traveling currently and have only my boneblack and it passes my limited testing. If it solves your problems, too then I would address Heikki's latest comments and prepare the final v10 (and I hope I didn't break beagle board in between). >Thanks again, >Frans Sebastian