[PATCH v2 0/3] Support SDMA mode on RPI4 target - 32bit
Jaehoon Chung
jh80.chung at samsung.com
Wed Mar 18 00:50:37 CET 2020
Hi
Is there any comment or plan to apply?
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(-)
>
More information about the U-Boot
mailing list