Re: commit 271e1b86e691 is breaking DMA uart on SoCFPGA

[Caesar Wang <caesar.upstream@gmail.com>]

在 2016年02月24日 21:24, Bartlomiej Zolnierkiewicz 写道:
> Hi,
>
> On Wednesday, February 24, 2016 02:01:59 PM Caesar Wang wrote:
>> Hi,
>>
>> Thanks Dinh & Alexander for the intergration testing.
>>
>> ---
>>
>> @Dinh,
>>
>> Can you test it again with the patch[0]?
>>
>> patch[0]:
>> https://patchwork.kernel.org/patch/8398511/
> This fixes the problem for me (tested on Samsung Exynos4412 SoC
> based Trats2 board).
>
> You may add:
>
> Tested-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>


Thanks Bartlomiej for sharing the test result.:-)


-
Caesar
>
> to your patch.
>
> Best regards,
> --
> Bartlomiej Zolnierkiewicz
> Samsung R&D Institute Poland
> Samsung Electronics
>
>> -
>> Caesar
>> 在 2016年02月23日 23:14, Dinh Nguyen 写道:
>>> Hi,
>>>
>>> Sorry that I couldn't get to this sooner.
>>>
>>> On 02/18/2016 10:07 AM, Alexander Kochetkov wrote:
>>>> Hello!
>>>>
>>>> Bartlomiej, could you please tell what uart driver is used on Samsung
>>>> Exynos4412?
>>>> Dinh, could you please tell what uart driver is used on SoCFPGA?
>>>>
>>> SoCFPGA is using the 8250_dw.c uart driver.
>>>
>>>> Could you make two test?
>>>>
>>>> 1) Checkout tree at commit 848e9776fee4 "dmaengine: pl330: support
>>>> burst mode for
>>>>    dev-to-mem and mem-to-dev transmit", make it buildable and see is it
>>>> works. In order to make in buildable remove bursts argument from the
>>>> line:
>>>>
>>>>       if (*bursts == 1)
>>>>       - return _bursts(pl330, dry_run, buf, pxs, 1);
>>>>       + return _bursts(dry_run, buf, pxs, 1);
>>>>
>>> This case still fails for me.
>>>
>>>> 2) Checkout next-20160211 kernel tree and set src_maxburst and
>>>> dst_maxburst to 1 inside UART driver to see is it works?
>>>>
>>> This case works and the UART is able to operate in DMA mode.
>>>
>>> Dinh
>

-- 
Thanks,
Caesar