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: Tue, 16 Sep 2014 18:55:37 +0200 Message-ID: <54186B89.8050505@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> 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]:43203 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754319AbaIPQzt (ORCPT ); Tue, 16 Sep 2014 12:55:49 -0400 In-Reply-To: <54171B85.5060209@linutronix.de> Sender: linux-serial-owner@vger.kernel.org List-Id: linux-serial@vger.kernel.org To: Peter Hurley , Heikki Krogerus Cc: 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 09/15/2014 07:01 PM, Sebastian Andrzej Siewior wrote: > On 09/11/2014 04:35 PM, Peter Hurley wrote: >> I do need to find out if omap hardware sets UART_MSR_DCTS when auto = CTS >> is on. Would you mind running the debug patch below with HW flow con= trol on? >=20 > I didn't forget about this. However I told minicom to use hardware fl= ow > control (and I see the driver set the HW bit) but I haven't seen that > uart_handle_cts_change() has been invoked at all. I'm going to check > two other boards and report then. No, I don't get into this at all function. 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= =E2=80=A6 >> Regards, >> Peter Hurley >=20 Sebastian -- To unsubscribe from this list: send the line "unsubscribe linux-serial"= in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html