On 01/11/2021 22:11, Peter Robinson wrote: > On Mon, Nov 1, 2021 at 11:18 AM Jack Mitchell <m...@embed.me.uk> wrote: >> >> On 01/11/2021 09:07, 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"). >> >> I'm also experiencing issue with the re-init of emmc on a 3399 platform, >> did you come to any conclusions on the reason? It works fine to load >> u-boot proper from SPL but then fails in u-boot proper when attempting >> to perform any mmc activity. > > Does the following patch fix the rk3399 problem? > http://patchwork.ozlabs.org/project/uboot/patch/20211101044347.17822-1-yifeng.z...@rock-chips.com/ >
Hi Peter, I have this patch in my tree which fixes the initial init of the emmc, but it then fails later when it is re-initialised. Does everything work fine on your Rock960, can you boot Linux from the emmc when going SPL (emmc) -> Proper (emmc) -> Linux (emmc)? Thanks for the suggestion! Regards, >> Regards, >> Jack. >> >>> 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 >>> >>> 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(+) >>> >> >> -- >> Jack Mitchell, Consultant >> https://www.tuxable.co.uk -- Jack Mitchell, Consultant https://www.tuxable.co.uk
