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

Peng Fan peng.fan at nxp.com
Mon Mar 23 02:14:34 CET 2020


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?

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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