linux-kernel - Re: [PATCH v8 00/18] 8250-core based serial driver for OMAP + DMA

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Message-ID: <20140908175510.GK3238@atomide.com>
Date:	Mon, 8 Sep 2014 10:55:10 -0700
From:	Tony Lindgren <tony@...mide.com>
To:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	balbi@...com, Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v8 00/18] 8250-core based serial driver for OMAP + DMA

* Tony Lindgren <tony@...mide.com> [140908 10:41]:
> * Sebastian Andrzej Siewior <bigeasy@...utronix.de> [140905 12:03]:
> > This is my complete queue fo the omap serial driver based on the 8250 core
> > code. I played with it on beagle bone, am335x-evm and dra7xx including DMA.
> > The runtime-pm pieces look now bug-compatible with the omap-serial driver.
> > Besides the runtime-om improvement I also fixed a few corner cases for the
> > TX-DMA problem. The DMA fixes (in edma and omap-dma) were dropped and the
> > problem has been in 8250-dma via patch #13.
> > 
> > The whole queue is available at
> >   git://git.breakpoint.cc/bigeasy/linux.git uart_v8
> 
> Gave the above branch a quick try, but it again does not idle for
> my omap3 test cases. It seems that now the cm_idlest1_core sdma
> bit is blocking deeper idle states. Is that the correct branch
> to use?

Never mind. User error. I forgot to apply my own patch for force
idling the UARTs for the omap hwmod. And the sdma bit clears if
I do sleep 5 before attempting to read the sysfs entry..

Regards,

Tony
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