From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751119AbdAQGHA (ORCPT ); Tue, 17 Jan 2017 01:07:00 -0500 Received: from lelnx193.ext.ti.com ([198.47.27.77]:18197 "EHLO lelnx193.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750888AbdAQGG6 (ORCPT ); Tue, 17 Jan 2017 01:06:58 -0500 Subject: Re: [PATCH 0/3] tty: serial: 8250_omap: Enable DMA support To: Tony Lindgren References: <20170113080201.6515-1-vigneshr@ti.com> <20170113182021.GD2630@atomide.com> CC: Greg Kroah-Hartman , Jiri Slaby , Peter Hurley , Sebastian Andrzej Siewior , "linux-serial@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-omap@vger.kernel.org" From: Vignesh R Message-ID: Date: Tue, 17 Jan 2017 11:36:17 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 MIME-Version: 1.0 In-Reply-To: <20170113182021.GD2630@atomide.com> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Friday 13 January 2017 11:50 PM, Tony Lindgren wrote: > * Vignesh R [170113 00:03]: >> This patch series re enables DMA support for UART 8250_omap driver. >> >> Tested on AM335x, AM437x that use EDMA and OMAP5 and DRA74 EVM with >> SDMA. > > Is 8250_omap serial console working for you on omap5 in general? > > I've noticed that it's really unresponsive for me as if the FIFO > interrupt was not working. For example logging in might take several > attempts and a long time with each character showing up much later > after some timeout. > Yes, I did face the same issue on omap5 using 8250_omap driver for console. Looks like this bug has existed all along. > TX on the uart on omap5 seems to work OK, I do see all the console > messages fine. And these patches do not make the issue better or > worse. > True. -- Regards Vignesh