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

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Date:	Tue, 09 Sep 2014 09:33:42 +0200
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	Tony Lindgren <tony@...mide.com>
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

On 09/08/2014 07:55 PM, Tony Lindgren wrote:
> * 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..

Okay. There is also this "uart_v8_hacks" branch where I splitted out
the hacks I had like the pstore one or the force idle for instance.

> Regards,
> 
> Tony

Sebastian
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