[U-Boot] [PATCH] am335x_hs_evm: Trim options in SPL to reduce binary size

[Tom Rini <trini@konsulko.com>]

On Tue, Dec 19, 2017 at 08:54:25AM -0600, Andrew F. Davis wrote:
> On 12/16/2017 10:04 PM, Tom Rini wrote:
> > The am335x_hs_evm runs into size constraint problems at times with
> > various toolchains as changes come in due to the config have a large
> > number of options in SPL (to showcase what is possible) while also
> > having rather constrained binary limits.  Gain some of this room back by
> > lowering the loglevel, disabling HW partition support and switching over
> > to the tiny FIT image support.
> > 
> > Cc: Andrew F. Davis <afd@ti.com>
> > Signed-off-by: Tom Rini <trini@konsulko.com>
> > ---
> > I'd really appreciate a run-time test of this patch if at all possible
> > as I'm a little worried about TINY_FIT being incompatible with all of
> > the security options.  Thanks!
> > ---
> >  configs/am335x_hs_evm_defconfig | 4 ++++
> >  1 file changed, 4 insertions(+)
> > 
> > diff --git a/configs/am335x_hs_evm_defconfig b/configs/am335x_hs_evm_defconfig
> > index 48b0e8583997..8eb304686dc7 100644
> > --- a/configs/am335x_hs_evm_defconfig
> > +++ b/configs/am335x_hs_evm_defconfig
> > @@ -13,10 +13,12 @@ CONFIG_ANDROID_BOOT_IMAGE=y
> >  CONFIG_FIT_IMAGE_POST_PROCESS=y
> >  CONFIG_SPL_LOAD_FIT=y
> >  CONFIG_SPL_FIT_IMAGE_POST_PROCESS=y
> > +CONFIG_LOGLEVEL=3
> >  CONFIG_SYS_CONSOLE_INFO_QUIET=y
> >  CONFIG_VERSION_VARIABLE=y
> >  CONFIG_ARCH_MISC_INIT=y
> >  CONFIG_SPL=y
> > +CONFIG_SPL_FIT_IMAGE_TINY=y
> >  # CONFIG_SPL_ENV_SUPPORT is not set
> >  # CONFIG_SPL_EXT_SUPPORT is not set
> >  CONFIG_SPL_MTD_SUPPORT=y
> > @@ -37,6 +39,7 @@ CONFIG_DFU_RAM=y
> >  CONFIG_DM_I2C=y
> >  CONFIG_MISC=y
> >  CONFIG_DM_MMC=y
> > +# CONFIG_MMC_HW_PARTITIONING is not set
> 
> I haven't gotten around to testing the FIT_IMAGE_TINY stuff yet, but
> conceptually I have a much bigger problem with this part.
> 
> Sacrificing functionality to allow continued SPL bloat is just wrong.
> 
> Whatever caused SPL to grow should be re-worked or the author should
> have also made some optimization elsewhere to offset this. Now I'll have
> to go hunt for more optimizations somewhere so I can get all my features
> back here :(

FWIW, I don't think there was any functionality (aside from switching to
FIT_IMAGE_TINY, but if that supports everything needed in this
use-case...) that was removed exactly.  But I see your point too.
Jean-Jacques, was there anything else that could have been made
configurable in your MMC work, that wasn't?  Thanks!

-- 
Tom
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