On 02/11/2021 08:02, Peter Robinson wrote: > On Mon, Nov 1, 2021 at 10:32 PM Jack Mitchell <m...@embed.me.uk> wrote: >> >> 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)? > > Yes, I tested it last night with the patch applied on 2021.10.
If you get some time would you mind checking what speed the emmc is running at, by breaking into u-boot proper and running `mmc info`. I'm wondering if yours isn't configuring at hs400 and therefore bypassing the issue. > >> 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 -- Jack Mitchell, Consultant https://www.tuxable.co.uk
