*DRAM_CLK* seems to affect this. Reducing to say 432 lets the board boot about 70% of the time.
The hang seems to be coming from the *spl_load_image *function defined in common/spl/spl.c, with the SPL sometimes failing to load the U-boot image. Could this be an issue with MMC controller timings ?? Looking at the A33 and R16 user manuals show the Physical Layer Spec for the former is Ver3.00 that for the latter is Ver2.00. Maybe this explains why the boot on the R16 never hangs. My current knowledge of MMC controllers is still ~nil to be able to read the specs and comprehend the difference. Brandon. On Thursday, September 22, 2022 at 11:08:32 AM UTC+1 Cheo Fusi wrote: > Hi Simon, > > Did you finally solve this issue?? I have the same problem with the M2M > variant that has no eMMC chip. The same image works well with the variant > that includes the eMMC. > > Brandon > On Tuesday, November 30, 2021 at 3:09:21 PM UTC+1 simon...@gmail.com > wrote: > >> Hi, >> >> I'm trying to get a banana pi M2M working on a slightly more recent >> version of the kernel than the 3.4 that's provided. I got some things >> working but u-boot isn't reliably booting from the sd card. It sometimes >> works but it mostly hangs after displaying the DRAM message (as shown below) >> >> ``` >> U-Boot SPL 2022.01-rc3 (Nov 30 2021 - 10:46:41 +0000) >> DRAM: 512 MiB >> >> <pressed reset> >> >> U-Boot SPL 2022.01-rc3 (Nov 30 2021 - 10:46:41 +0000) >> DRAM: 512 MiB >> >> <pressed reset> >> >> U-Boot SPL 2022.01-rc3 (Nov 30 2021 - 10:46:41 +0000) >> DRAM: 512 MiB >> >> <pressed reset> >> >> U-Boot SPL 2022.01-rc3 (Nov 30 2021 - 10:46:41 +0000) >> DRAM: 512 MiB >> >> <pressed reset> >> >> U-Boot SPL 2022.01-rc3 (Nov 30 2021 - 10:46:41 +0000) >> DRAM: 512 MiB >> >> <pressed reset> >> >> U-Boot SPL 2022.01-rc3 (Nov 30 2021 - 10:46:41 +0000) >> DRAM: 512 MiB >> >> <pressed reset> >> >> U-Boot SPL 2022.01-rc3 (Nov 30 2021 - 10:46:41 +0000) >> DRAM: 512 MiB >> Trying to boot from MMC1 >> >> >> U-Boot 2022.01-rc3 (Nov 30 2021 - 10:46:41 +0000) Allwinner Technology >> >> CPU: Allwinner A33 (SUN8I 1667) >> Model: BananaPi M2 Magic >> DRAM: 512 MiB >> WDT: Not starting watchdog@1c20ca0 >> MMC: mmc@1c0f000: 0, mmc@1c10000: 1, mmc@1c11000: 2 >> ``` >> >> Looking through the wiki https://linux-sunxi.org/U-Boot it looks like it >> could be because of the device tree, but considering it's booting some >> times I don't think this is the issue? It looks like SPL is always working >> but it's often failing to pass to u-boot proper. >> >> Any pointers on what could be wrong here? >> >> Has anyone got a bananapi m2m or similar working well with a recent >> kernel? I managed to get SPI working fine (i might submit a patch) but so >> far I haven't managed to get wifi working (a bit stuck on that) and I >> haven't looked much beyond that. >> >> Best regards, >> Simon >> > -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/linux-sunxi/0a26de1e-a3d9-41e3-b93e-d94316bf0b11n%40googlegroups.com.
