On Thu, Oct 23, 2014 at 7:31 AM, Kevin Cernekee <cernekee@xxxxxxxxx> wrote: >> I think we'd just have to add a noearlycon option instead if we made >> it the default. It's never been the default before, so I don't think >> we should change now. There's also an implicit requirement that the >> bootloader has configured the uart already. You could easily hang if >> the uart has not been setup. > > EARLY_PRINTK is enabled by default on MIPS platforms that support it. > I have been using this for years and found it very helpful in > debugging failures in the kernel boot process (especially intermittent > ones). > > But for a new platform it is better to use earlycon as earlycon > provides a clean way of reading the UART information out of DT. My > original bcm3384 (MIPS) port used EARLY_PRINTK but I recently > converted it to earlycon. The last remaining goal is to get it > enabled by default again. Hi Rob, Do you think we should just drop this patch for now, and use these options to append "earlycon" to the bootloader-supplied command line: CONFIG_CMDLINE_BOOL=y CONFIG_CMDLINE="earlycon" CONFIG_CMDLINE_OVERRIDE=n If you have other suggestions on how to enable earlycon by default, I would be happy to help implement them. Thanks!
