| Message ID | 20200120102029.14264-1-jh80.chung@samsung.com |
|---|---|
| Headers | show |
| Series | Support SDMA mode on RPI4 target - 32bit | expand |
> 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. What about on other models of the rpi given they all use the same sdhci controller? > Read/write time about 8MB file > Before > - Read : 1.472 seconds > - Write : 4.690 seconds > After > - Read : 0.359 seconds > - Write : 0.574 seconds > > Jaehoon Chung (4): > mmc: bcm2835_sdhci: use phys2bus macro when dma address is accessed > mmc: sdhci: add quriks relevant to broken SDMA > mmc: bcm2835_sdhci: set SDHCI_QUIRK_BROKEN_SDMA flag > configs: rpi_4_32b_defconfig: enable SDHCI_SDMA config > > configs/rpi_4_32b_defconfig | 1 + > drivers/mmc/bcm2835_sdhci.c | 10 ++++++++-- > drivers/mmc/sdhci.c | 10 ++++++++-- > include/sdhci.h | 1 + > 4 files changed, 18 insertions(+), 4 deletions(-) > > -- > 2.25.0 >
On 1/20/20 8:50 PM, Peter Robinson 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. > > What about on other models of the rpi given they all use the same > sdhci controller? Well, i didn't check other models. As i know, in RPI3's case, SDHCI controller is used for WiFi. So it doesn't need to check on u-boot side. I had checked RPI4 target. (1/2/4GB model) If other RPI models are using same SDHCI controller(assume that provides same functionality), it can be used SDMA mode. Best Regards, Jaehoon Chung > >> Read/write time about 8MB file >> Before >> - Read : 1.472 seconds >> - Write : 4.690 seconds >> After >> - Read : 0.359 seconds >> - Write : 0.574 seconds >> >> Jaehoon Chung (4): >> mmc: bcm2835_sdhci: use phys2bus macro when dma address is accessed >> mmc: sdhci: add quriks relevant to broken SDMA >> mmc: bcm2835_sdhci: set SDHCI_QUIRK_BROKEN_SDMA flag >> configs: rpi_4_32b_defconfig: enable SDHCI_SDMA config >> >> configs/rpi_4_32b_defconfig | 1 + >> drivers/mmc/bcm2835_sdhci.c | 10 ++++++++-- >> drivers/mmc/sdhci.c | 10 ++++++++-- >> include/sdhci.h | 1 + >> 4 files changed, 18 insertions(+), 4 deletions(-) >> >> -- >> 2.25.0 >> > >