linux-kernel - Re: [PATCH v7] 8250-core based serial driver for OMAP + DMA

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Date:	Sun, 17 Aug 2014 22:35:12 +0200
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	Tony Lindgren <tony@...mide.com>
Cc:	Lennart Sorensen <lsorense@...lub.uwaterloo.ca>,
	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	balbi@...com, Vinod Koul <vinod.koul@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v7] 8250-core based serial driver for OMAP + DMA

* Tony Lindgren | 2014-08-15 13:28:27 [-0700]:

>> It configured the trigger levels to 1 for RX and 16 for TX.
>
>Hmm that weird RX trigger level is a workaround for lost characters.
>
>See commit 0ba5f66836 (tty: serial: OMAP: use a 1-byte RX FIFO
>threshold in PIO mode :)
>
>There's paste test in that commit, I wonder if the 8250 drivers
>can deal with it any better?

I recall that I used it as a console and didn't see any missing chars.
I will try test but I am traveling this week…

>Regards,
>
>Tony

Sebastian
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