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. > 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
