[PATCH v2 0/3] Support SDMA mode on RPI4 target - 32bit

Jaehoon Chung jh80.chung at samsung.com
Tue Mar 24 08:12:23 CET 2020


On 3/23/20 10:14 AM, Peng Fan wrote:
> Hi Jaehoon,
> 
>> Subject: Re: [PATCH v2 0/3] Support SDMA mode on RPI4 target - 32bit
>>
>> On 3/18/20 10:00 AM, Peng Fan wrote:
>>>> Subject: Re: [PATCH v2 0/3] Support SDMA mode on RPI4 target - 32bit
>>>>
>>>> Hi
>>>>
>>>> Is there any comment or plan to apply?
>>>
>>> Sorry, I missed this patchset. Will pick it up.
> 
> This patchset could not be applied on master, would you rebase?

Sure, i will resend after rebase on latest. 

Best Regards,
Jaehoon Chung

> 
> Thanks,
> Peng.
> 
>>
>> No problem. :) Thanks!
>>
>> Best Regards,
>> Jaehoon Chung
>>
>>>
>>> Thanks,
>>> Peng.
>>>
>>>>
>>>> Best Regards,
>>>> Jaehoon Chung
>>>>
>>>> On 2/18/20 10:25 AM, Jaehoon Chung wrote:
>>>>> RPI4's SDHCI controller is supported SDMA mode. (Checked on kernel
>>>>> side) But It doesn't use on u-boot side. Then it's too slow about
>>>>> read/write
>>>> performance.
>>>>> This patchset is supported SDMA mode on RPI4 target(32bit).
>>>>> - I didn't test on RPI4 64bit.
>>>>>
>>>>> Read/write time about 8MB file
>>>>> Before
>>>>> - Read : 1.472 seconds
>>>>> - Write : 4.690 seconds
>>>>> After
>>>>> - Read : 0.359 seconds
>>>>> - Write : 0.574 seconds
>>>>>
>>>>> This patch is based on my RFC's patches.RPI4's SDHCI controller is
>>>>> supported SDMA mode. (Checked on kernel side) But It doesn't use on
>>>> u-boot side. Then it's too slow about read/write performance.
>>>>> This patchset is supported SDMA mode on RPI4 target(32bit).
>>>>> - I didn't test on RPI4 64bit.
>>>>>
>>>>> Read/write time about 8MB file
>>>>> Before
>>>>> - Read : 1.472 seconds
>>>>> - Write : 4.690 seconds
>>>>> After
>>>>> - Read : 0.359 seconds
>>>>> - Write : 0.574 seconds
>>>>>
>>>>> This patch is based on my RFC's patches.
>>>>>
>>>>> Changelog on V2
>>>>> - Keep printf message instead of debug
>>>>> - Add Peng's Reviewed-by tag
>>>>>
>>>>> Jaehoon Chung (3):
>>>>>   mmc: sdhci: use phys2bus macro when dma address is accessed
>>>>>   mmc: sdhci: not return error when SDMA is not supported
>>>>>   configs: rpi_4_32b_defconfig: enable SDHCI_SDMA config
>>>>>
>>>>>  configs/rpi_4_32b_defconfig |  1 +
>>>>>  drivers/mmc/sdhci.c         | 13 +++++++------
>>>>>  2 files changed, 8 insertions(+), 6 deletions(-)
>>>>>
>>>
> 



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