On Thu, Feb 12, 2026 at 4:19 PM Andreas Kemnade <[email protected]> wrote: > > On Thu, 12 Feb 2026 17:55:43 +0100 > "H. Nikolaus Schaller" <[email protected]> wrote: > > > > Am 12.02.2026 um 17:47 schrieb Andreas Kemnade <[email protected]>: > > > > > > On Thu, 12 Feb 2026 16:49:43 +0100 > > > "H. Nikolaus Schaller" <[email protected]> wrote: > > > > > >>> Am 12.02.2026 um 16:26 schrieb Kory Maincent (TI) > > >>> <[email protected]>: > > >>> > > >>> Allow overlays to be applied to any DTB. This adds around ~40% to the > > >>> total size of the DTB files on average. > > >> > > >> Is this unconditionally enabled or can it be turned off by some CONFIG? > > >> We have > > >> our own defconfig so I would not worry if if is enabled in > > >> omap2plus_defconfig > > >> and disabled in ours. > > >> > > >> We have several devices where the boot loader can't handle overlays > > >> (never touch > > >> a working boot-loader :) So this seems to only contribute to build and > > >> load time > > >> without benefit. > > >> > > > As long as you do not add overlays, the bootloader does not care. I would > > > like to simply carry around the 1-bit mmc overlay for one broken board. > > > That would help me. So I think there is a benefit but nobody forces > > > you to use it. > > > > Well, it does not force to use the really good feature, but it forces to add > > ~40% more file size and some more compile time, if I understand it > > correctly. > > > Compile time, hardly measurable even if you just do make dtbs. > > Size on disk: > a) if it lives around in a /boot partitions with kernels and initrams in it, > then we are around 1% more space needed. > > b) if it has separate partitions maybe on some mtd: Looking around: GTA04 > has quite some headroom left. Usage is still <50% even with symbols > enabled. > > But on the other no one else seems to enable that besides for devices with > open expansion boards carrying "hats". So overall, should we really be the > exception?
Do we want to maybe transition like TI did for k3? Start with board specific DTC_FLAGS flags for specific boards: and then just enabling overlays by default : https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/arch/arm64/boot/dts/ti/Makefile?id=bca4146b1f66dbca07591bfd6ad695c699b5a093 If we do board-specific, all the "Beagle" related items can be auto enabled `-@`.. Regards, -- Robert Nelson https://rcn-ee.com/
