[PATCH v2 0/2] {vision/navigation}-mezzanine: Fix overlay root node

[Nikita Travkin]

While considering to propose WoA EL2 dt overlays upstream I was looking
at existing overlays and noticed that some of them are broken: they put
seemingly meaningful fixups into the overlay's "/" node, which places
them into the overlay "metadata" itself, not into a fixup fragment to be
applied to the actual dtb. This series fixes those two by changing to
full path "&{/}" which should work as it was initially intended.

See demonstration of the problem below:

$ cat base.dts
/dts-v1/;
/ {
	compatible = "fake,board";
	fake,value = <42>;
};

$ cat extra.dtso
/dts-v1/;
/plugin/;

/ {
	foo;
	bar { baz; };
};
&{/} { whatever-comes-next-after-baz; };

$ dtc base.dts -o base.dtb
$ dtc extra.dtso -o extra.dtbo
$ fdtoverlay -i base.dtb -o combine.dtb extra.dtbo
$ dtc base.dtb
/dts-v1/;

/ {
	compatible = "fake,board";
	fake,value = <0x2a>;
};

$ dtc extra.dtbo
/dts-v1/;

/ {
	foo;

	bar {
		baz;
	};

	fragment@0 {
		target-path = "/";

		__overlay__ {
			whatever-comes-next-after-baz;
		};
	};
};

$ dtc combine.dtb
/dts-v1/;

/ {
	whatever-comes-next-after-baz;
	compatible = "fake,board";
	fake,value = <0x2a>;
};

In the resulting dtb foo bar and baz are missing.

Signed-off-by: Nikita Travkin <nikita@xxxxxxx>
---
Changes in v2:
- Just revert the original commits (Bryan)
- Link to v1: https://lore.kernel.org/r/20250226-qcom-nonroot-overlays-v1-0-26c6e7605833@xxxxxxx

---
Nikita Travkin (2):
      arm64: dts: qcom: qrb5165-rb5-vision-mezzanine: Drop CMA heap
      arm64: dts: qcom: sdm845-db845c-navigation-mezzanine: Drop CMA heap

 arch/arm64/boot/dts/qcom/qrb5165-rb5-vision-mezzanine.dtso    | 11 -----------
 .../boot/dts/qcom/sdm845-db845c-navigation-mezzanine.dtso     | 11 -----------
 2 files changed, 22 deletions(-)
---
base-commit: be5c7bbb3a64baf884481a1ba0c2f8fb2f93f7c3
change-id: 20250226-qcom-nonroot-overlays-bfe21d33be8c

Best regards,
-- 
Nikita Travkin <nikita@xxxxxxx>