linux-kernel - Re: [PATCH 0/3] tty: serial: 8250

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Date:   Fri, 13 Jan 2017 10:20:21 -0800
From:   Tony Lindgren <tony@...mide.com>
To:     Vignesh R <vigneshr@...com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>,
        Peter Hurley <peter@...leysoftware.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-omap@...r.kernel.org
Subject: Re: [PATCH 0/3] tty: serial: 8250_omap: Enable DMA support

* Vignesh R <vigneshr@...com> [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.

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.

Regards,

Tony