On Wed, Dec 20, 2017 at 01:55:51AM +0000, André Przywara wrote: > On 19/12/17 15:24, Maxime Ripard wrote: > > 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. > > Just tested it: without CONSOLE_MUX we don't use video and USB keyboard > automatically. It seems to default to serial, "setenv stdout vidconsole" > switches over (immediately). This is quite weird behaviour, and probably > quite unpleasant for the casual user. > With CONSOLE_MUX defined we get what we want: always serial console, > plus USB keyboard and HDMI, if connected. Output appears on both, input > is accepted from both. > So I would very much like to keep it in.
Sounds like we should even enable it for everyone then. Maxime -- Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com
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