Hi, On 11/1/21 6:07 PM, Alper Nebi Yasak wrote: > I'm trying to make my gru-kevin's eMMC work properly (it times out while > tuning for HS400 and stops working when reinitialized via "mmc dev 0"). > While experimenting with what works on my board I ended up implementing > HS400ES support. And while I'm at it, I decided to do it for RK3568 as > well since it turned out easy enough. Both are ported from relevant > Linux drivers. > > I'm trying this with "load mmc 0:1 0xd0000000 /bigfile $size" and getting > the following speeds; and with "mmc info" the following differences: > > gru-kevin mmc0 | w/o this series | w/ this series > --------------------+---------------------------+------------------- > Bus Speed | 52000000 | 200000000 > Mode | MMC High Speed (52MHz) | HS400ES (200 MHz) > 8MiB Load Speed | ~9.5 MiB/s | ~51.5 MiB/s > 256MiB Load Speed | ~177.8 MiB/s | ~114.5 MiB/s
I wonder why HS400ES is lower than High Speed mode in 256MiB Load Speed. Best Regards, Jaehoon Chung > > Listing partitions, listing files, reading files and the loaded bytes > all look fine to me, but I'm not sure I haven't missed anything. > > > Alper Nebi Yasak (3): > mmc: sdhci: Add HS400 Enhanced Strobe support > rockchip: sdhci: Add HS400 Enhanced Strobe support for RK3399 > rockchip: sdhci: Add HS400 Enhanced Strobe support for RK3568 > > drivers/mmc/rockchip_sdhci.c | 51 ++++++++++++++++++++++++++++++++++++ > drivers/mmc/sdhci.c | 18 +++++++++++++ > include/sdhci.h | 1 + > 3 files changed, 70 insertions(+) >
