From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755868AbaIQQZT (ORCPT ); Wed, 17 Sep 2014 12:25:19 -0400 Received: from www.linutronix.de ([62.245.132.108]:49892 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755339AbaIQQZR (ORCPT ); Wed, 17 Sep 2014 12:25:17 -0400 Message-ID: <5419B5E3.10307@linutronix.de> Date: Wed, 17 Sep 2014 18:25:07 +0200 From: Sebastian Andrzej Siewior User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Icedove/31.0 MIME-Version: 1.0 To: Peter Hurley CC: Heikki Krogerus , linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, tony@atomide.com, balbi@ti.com, gregkh@linuxfoundation.org, Alan Cox Subject: Re: [PATCH 09/16] tty: serial: 8250_dma: Add a TX trigger workaround for AM33xx References: <1410377411-26656-1-git-send-email-bigeasy@linutronix.de> <1410377411-26656-10-git-send-email-bigeasy@linutronix.de> <20140911111721.GB17476@xps8300> <54118AAB.2010205@linutronix.de> <5411967A.6090406@hurleysoftware.com> <54119AAA.9080907@linutronix.de> <5411B33F.10405@hurleysoftware.com> <54171B85.5060209@linutronix.de> <54186B89.8050505@linutronix.de> <54197C99.8030601@hurleysoftware.com> In-Reply-To: <54197C99.8030601@hurleysoftware.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/17/2014 02:20 PM, Peter Hurley wrote: >> So I connected my am335x-evm >> with beagle board xm because both of them have an old fashion UART >> connector (instead those uart-to-usb). Both configured with HW-Flow and >> I haven't seen the function invoked but I saw "port->icount.overrun" >> being incremented. This shouldn't happen. So I am a little puzzled here… > > Yeah, that's weird. Do you have a break-out box to confirm that RTS/CTS are > being driven? Yeah, I've been thinking about that, too. I will be gone next week and hopefully when I get back I will something around to test this. > > Regards, > Peter Hurley > Sebastian From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sebastian Andrzej Siewior Subject: Re: [PATCH 09/16] tty: serial: 8250_dma: Add a TX trigger workaround for AM33xx Date: Wed, 17 Sep 2014 18:25:07 +0200 Message-ID: <5419B5E3.10307@linutronix.de> References: <1410377411-26656-1-git-send-email-bigeasy@linutronix.de> <1410377411-26656-10-git-send-email-bigeasy@linutronix.de> <20140911111721.GB17476@xps8300> <54118AAB.2010205@linutronix.de> <5411967A.6090406@hurleysoftware.com> <54119AAA.9080907@linutronix.de> <5411B33F.10405@hurleysoftware.com> <54171B85.5060209@linutronix.de> <54186B89.8050505@linutronix.de> <54197C99.8030601@hurleysoftware.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from www.linutronix.de ([62.245.132.108]:49892 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755339AbaIQQZR (ORCPT ); Wed, 17 Sep 2014 12:25:17 -0400 In-Reply-To: <54197C99.8030601@hurleysoftware.com> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Peter Hurley Cc: Heikki Krogerus , linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, tony@atomide.com, balbi@ti.com, gregkh@linuxfoundation.org, Alan Cox On 09/17/2014 02:20 PM, Peter Hurley wrote: >> So I connected my am335x-evm >> with beagle board xm because both of them have an old fashion UART >> connector (instead those uart-to-usb). Both configured with HW-Flow = and >> I haven't seen the function invoked but I saw "port->icount.overrun" >> being incremented. This shouldn't happen. So I am a little puzzled h= ere=E2=80=A6 >=20 > Yeah, that's weird. Do you have a break-out box to confirm that RTS/C= TS are > being driven? Yeah, I've been thinking about that, too. I will be gone next week and hopefully when I get back I will something around to test this. >=20 > Regards, > Peter Hurley >=20 Sebastian -- To unsubscribe from this list: send the line "unsubscribe linux-omap" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html From mboxrd@z Thu Jan 1 00:00:00 1970 From: bigeasy@linutronix.de (Sebastian Andrzej Siewior) Date: Wed, 17 Sep 2014 18:25:07 +0200 Subject: [PATCH 09/16] tty: serial: 8250_dma: Add a TX trigger workaround for AM33xx In-Reply-To: <54197C99.8030601@hurleysoftware.com> References: <1410377411-26656-1-git-send-email-bigeasy@linutronix.de> <1410377411-26656-10-git-send-email-bigeasy@linutronix.de> <20140911111721.GB17476@xps8300> <54118AAB.2010205@linutronix.de> <5411967A.6090406@hurleysoftware.com> <54119AAA.9080907@linutronix.de> <5411B33F.10405@hurleysoftware.com> <54171B85.5060209@linutronix.de> <54186B89.8050505@linutronix.de> <54197C99.8030601@hurleysoftware.com> Message-ID: <5419B5E3.10307@linutronix.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 09/17/2014 02:20 PM, Peter Hurley wrote: >> So I connected my am335x-evm >> with beagle board xm because both of them have an old fashion UART >> connector (instead those uart-to-usb). Both configured with HW-Flow and >> I haven't seen the function invoked but I saw "port->icount.overrun" >> being incremented. This shouldn't happen. So I am a little puzzled here? > > Yeah, that's weird. Do you have a break-out box to confirm that RTS/CTS are > being driven? Yeah, I've been thinking about that, too. I will be gone next week and hopefully when I get back I will something around to test this. > > Regards, > Peter Hurley > Sebastian