[Patch V4 0/3] Support SDMA mode on RPI4 target - 32bit

[Jaehoon Chung]

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(32/64bit).
- Tested on RPI4 1GB/2GB/4GB target

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

Changelog on V4
- Enable SDMA in rpi4_defconfig for 64bit

Changelog on V3
- Rebased on latest u-boot-mmc

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 : enable SDHCI_SDMA config

 configs/rpi_4_32b_defconfig |  1 +
 configs/rpi_4_defconfig     |  1 +
 drivers/mmc/sdhci.c         | 13 +++++++------
 3 files changed, 9 insertions(+), 6 deletions(-)

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2.26.0