Hi Mark,
thanks for forwarding. Unfortunately i don't have the time for real investigation until next week, so here some remote diagnostics.
Am 25.07.2018 um 18:11 schrieb Mark Brown:
On Tue, Jul 24, 2018 at 09:46:38AM -0700, kernelci.org bot wrote:
For a little while now the RPi B has been failing to boot using the bcm2835 defconfig in -next:
bcm2835_defconfig: bcm2835-rpi-b: lab-baylibre-seattle: failing since 5 days (last pass: next-20180718 - first fail: next-20180719) bcm2837-rpi-3-b: lab-baylibre: failing since 5 days (last pass: next-20180718 - first fail: next-20180719)It's working fine on arm64, whatever's going on appears to be specific to this config (it's not getting booted with any other 32 bit configs). Full info and boot logs for one of the boards here:
https://kernelci.org/boot/id/5b58416759b514139596baae/it looks like it hangs somewhere shortly after or during initializing MMC so never makes it to the console, the tail of the failing logs looks like:
| 09:18:36.332120 [ 1.459801] mmc1: queuing unknown CIS tuple 0x80 (7 bytes) | 09:18:36.345711 [ 1.467585] mmcblk0: mmc0:59b4 USD 7.51 GiB | 09:18:36.346169 [ 1.474834] mmcblk0: p1 | 09:18:36.410184 [ 1.539600] random: fast init done | 09:18:36.458065 [ 1.578056] mmc1: new high speed SDIO card at address 0001 | 09:20:39.745370 ShellCommand command timed out.: Sending # in case of corruption. Connection timeout 00:04:10, retry in 00:02:05 | 09:20:39.846848 #
but like I say the same -next boots with arm64 defconfig.
There is at least 1 difference between bcm2835_defconfig and arm64 defconfig. bcm2835_defconfig uses DMA
[ 1.265671] sdhost-bcm2835 3f202000.mmc: loaded - DMA enabled (>1)
while arm64 defconfig uses PIO mode for SD interface mmc0 (please ignore mmc1 since it's the onboard wifi and it uses a different driver):
[ 1.907766] sdhost-bcm2835 3f202000.mmc: unable to initialise DMA channel. Falling back to PIO [ 1.995407] sdhost-bcm2835 3f202000.mmc: loaded - DMA disabled
The reason for this output is expected, because the DMA driver isn't build-in for this config.
I think this issue is DMA related.
Regards Stefan