On Tue, May 25, 2021 at 06:55:52AM -0500, Nishanth Menon wrote:
> On 21:51-20210524, Denys Dmytriyenko wrote:
> > On Mon, May 24, 2021 at 05:40:36PM -0500, Yogesh Siraswar via
> > lists.yoctoproject.org wrote:
> > > Added KERNEL_DTB_OVERLAY_SUPPORT to individual MACHINE conf to
> > > compile dtbs with symbols. This fixes the issue where the dtbs
> > > are build without symbols causing issue with overlays.
> > >
> > > Enabling overlay support increases the size of the dtb, hence
> > > it is done at a platform level rather than globally to allow custom
> > > boards disable it from local.conf to reduce size.
> > >
>
> ^^
>
> > > Signed-off-by: Yogesh Siraswar <[email protected]>
> > > ---
> > > conf/machine/am335x-evm.conf | 2 ++
> > > conf/machine/am335x-hs-evm.conf | 2 ++
> > > conf/machine/am437x-evm.conf | 2 ++
> > > conf/machine/am437x-hs-evm.conf | 2 ++
> > > conf/machine/am57xx-evm.conf | 2 ++
> > > conf/machine/am57xx-hs-evm.conf | 3 +++
> > > conf/machine/am65xx-evm.conf | 2 ++
> > > conf/machine/am65xx-hs-evm.conf | 2 ++
> > > conf/machine/dra7xx-evm.conf | 2 ++
> > > conf/machine/dra7xx-hs-evm.conf | 3 +++
> > > conf/machine/j7-evm.conf | 2 ++
> > > conf/machine/j7-hs-evm.conf | 2 ++
> > > conf/machine/j7200-evm.conf | 2 ++
> > > conf/machine/k2g-evm.conf | 2 ++
> > > conf/machine/k2g-hs-evm.conf | 2 ++
> >
> > First question:
> > If you are weakly assigning KERNEL_DTB_OVERLAY_SUPPORT in most of the
> > machine
> > configs, should it instead be done in SoC include files, like ti33x.inc,
> > k3.inc or even ti-soc.inc?
>
> You would want the default behavior as default dtb, not the bloated
> symbol loaded overlay capable dtb, no?
Well, but from the list above the only machines missing are AM64 and legacy
K2 HK/L/E. And since the assignment is weak (?=), it can still be changed
from local.conf, as the commit message says.
Anyway, if you don't think making it a bit more generic for ease of
maintenance is not worth it, then I'm fine with current approach.
> > > +
> > > +def get_extra_dtc_args(d):
> > > + if d.getVar('KERNEL_DTB_OVERLAY_SUPPORT') == "1":
> > > + return "DTC_FLAGS=-@"
> > > + else:
> > > + return ""
> > > +
> > > +EXTRA_DTC_ARGS += "${@get_extra_dtc_args(d)}"
> >
> > Second question:
> > Are there any specific future plans for EXTRA_DTC_ARGS? As it seems to be
> > an unused intermediary variable right now - you can directly append to
> > KERNEL_EXTRA_ARGS here...
>
> dtc changes are always incoming, does'nt make sense to keep that
> separated out?
Fair enough.
Acked-by: Denys Dmytriyenko <[email protected]>
--
Regards,
Denys Dmytriyenko <[email protected]>
PGP: 0x420902729A92C964 - https://denix.org/0x420902729A92C964
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