> Date: Tue, 19 Dec 2017 16:24:59 +0100 > From: Maxime Ripard <maxime.rip...@free-electrons.com> > > On Tue, Dec 19, 2017 at 02:41:17PM +0100, Mark Kettenis wrote: > > > Date: Tue, 19 Dec 2017 14:12:02 +0100 > > > From: Maxime Ripard <maxime.rip...@free-electrons.com> > > > > > > On Tue, Dec 05, 2017 at 10:28:20AM +0000, Andre Przywara wrote: > > > > So even though the actual u-boot.bin for 64-bit boards is still somewhat > > > > below the limit (~480KB), adding the ATF image (~32KB) pushes it over > > > > the edge. So since v2017.11 u-boot.itb is already too big for the > > > > traditional MMC env location. > > > > > > So I've had a quick look about what could go possibly go away in our > > > current armv8 config (using the pine64+ defconfig). Let me know if > > > some are actually vitals: > > > > > > - FIT_ENABLE_SHA256_SUPPORT > > > - CONSOLE_MUX > > > - CMD_CRC32 > > > - CMD_LZMADEC > > > - CMD_UNZIP > > > - CMD_LOADB > > > - CMD_LOADS > > > - CMD_MISC (actually implementing the command sleep) > > > - ISO_PARTITION (yes. For CDROMs.) > > > - VIDEO_BPP8, VIDEO_BPP16 > > > - VIDEO_ANSI > > > - SHA256 > > > - LZMA > > > > > > Removing those options make the u-boot.itb binary size going from > > > 516kB to 478kB, making it functional again *and* allowing us to enable > > > the DT overlays that seem way more important than any feature > > > mentionned above (and bumps the size to 483kB). > > > > So without CONFIG_CONSOLE_MUX, what is the behaviour when both serial > > console and usb keyboard are present? Is the usb keyboard used when > > it is plugged in but serial otherwise? > > That's actually a very good question, and I don't know, I never used a > USB keyboard with U-Boot. > > This is enabled on 7 Allwinner boards, and no one complained so far, > so I would expect to work without that option activated. However, it > doesn't take that much space either, so it's not like we really need > to disable it either.
I've used it on several board including my Orange Pi PC2. With this option enabled, all output from U-Boot and the EFI bootloader is visible on both serial and hdmi, and I can interact with U-Boot and the EFI bootloader over serial and using a USB keyboard. That allows users to interact with U-Boot and/or the EFI bootloader and configure whether the kernel sould use serial or "glass" console. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot