**** BEGIN LOGGING AT Sat Sep 15 03:00:27 2018
Sep 15 11:05:48 <likewise> good morning
Sep 15 11:15:46 <likewise> otavio: Hi, is there an existing i.MX platform that boots directly into Linux using a dcd.cfg in meta-freescale*?
Sep 15 11:16:46 <otavio> good morning likewise
Sep 15 11:17:00 <otavio> it does not. I made it for a specific customer
Sep 15 11:17:28 <otavio> generally speaking, you will prefer U-Boot Falcon mode instead
Sep 15 11:21:46 <likewise> otavio: thanks. Unless boot time is really most important.
Sep 15 11:22:28 <likewise> I'm investigating how to use eMMC dual hardware-boot-partitions, e.MMC fast boot, eMMC ack'd fast boot, eMMC 8-bit etc under i.MX
Sep 15 11:23:18 <likewise> I was first thinking: nice to have A/B kernel+initramfs in both boot partitions, but the iMX does not have a fall-back mechanism AFAIK
Sep 15 11:24:54 <likewise> so yes I think SPL mode is more flexible, as there I can take into account bootcnt etc.
Sep 15 11:25:57 <otavio> likewise: in fact, U-Boot will likely be faster as it enables cache
Sep 15 11:26:53 <otavio> likewise: the use-case we added the dcd boot support for a in-field recovery tool
Sep 15 11:26:54 <likewise> otavio: with U-Boot you mean; the full monty, not just SPL?
Sep 15 11:27:00 <otavio> SPL
Sep 15 11:27:05 <likewise> ok SPL
Sep 15 11:27:18 <otavio> in fact both. But SPL is faster of course
Sep 15 11:27:48 <likewise> otavio: did you ever play with the eMMC fuses for eMMC boot modes?
Sep 15 11:28:00 <likewise> i.MX fuses that are eMMC related I mean
Sep 15 11:28:22 <otavio> yes
Sep 15 11:28:27 <otavio> some time ago
Sep 15 11:28:52 <likewise> I guess it doesn't help much only loading the SPL.
Sep 15 11:29:16 <likewise> from there on, eMMC settings are already under software control
Sep 15 11:30:12 <otavio> what do you mean?
Sep 15 13:19:36 <likewise> otavio: initial boot rom reads from eMMC at slowest speed, 1bit, this can be enhanced with fuse settings.
Sep 15 13:20:09 <likewise> otavio: but as the SPL is so small, increasing the boot load speed using fuses is of little use.
Sep 15 13:20:37 <likewise> otavio: the SPL will configure the controller to load U-Boot or Linux kernel at maximum speed anyways.
Sep 15 13:21:05 <likewise> otavio: setting the fuses for optimal eMMC read speed would certainly be needed when loading the max BootROM capable image: 32 MB
**** ENDING LOGGING AT Sun Sep 16 02:59:59 2018