[PATCH v2 0/2] arm64: dts: qcom: beryllium compatible ordering and bindings update

[David Heidelberg via B4 Relay <devnull+david.ixit.cz@kernel.org>]

This series aligns the Xiaomi Poco F1 (beryllium) device tree
compatible strings with DT matching rules by ensuring proper
fallback to the generic device compatible.

Patch 1 updates the dt-bindings documentation to describe
the Tianma panel variant and clarify the expected compatible
string ordering and fallback requirements, aligning the
binding with actual DTS usage.

Patch 2 updates the DTS files to append the generic
"xiaomi,beryllium" compatible after the panel-specific ones.
This enables correct userspace fallback matching (e.g. for
hexagonrpcd), which currently fails when only the variant-
specific compatible is present. This constitutes a DT ABI
change, as additional compatible matches become possible.

Together, these changes fix an incomplete compatible chain
and ensure consistent behavior across panel variants.

Signed-off-by: David Heidelberg <david@ixit.cz>
---
Changes in v2:
- To be extra safe, CCed Arnauld and Marco (Mobian), Jens (for pmOS) is
  already in the loop, Petr (for NixOS Mobile is already in the loop).
- Improved description and documented that main distributions
  already use the patch (thus no API break will not happen to these
  projects).
- Link to v1: https://lore.kernel.org/r/20260403-beryllium-compat-string-v1-0-0a6b9cb55a20@ixit.cz

---
David Heidelberg (1):
      dt-bindings: arm: qcom: Document Xiaomi Poco F1 Tianma variant

Jens Reidel (1):
      arm64: dts: qcom: sdm845-xiaomi-beryllium: Append compatible strings

 Documentation/devicetree/bindings/arm/qcom.yaml             | 10 ++++++++--
 arch/arm64/boot/dts/qcom/sdm845-xiaomi-beryllium-ebbg.dts   |  2 +-
 arch/arm64/boot/dts/qcom/sdm845-xiaomi-beryllium-tianma.dts |  2 +-
 3 files changed, 10 insertions(+), 4 deletions(-)
---
base-commit: cc13002a9f984d37906e9476f3e532a8cdd126f5
change-id: 20260403-beryllium-compat-string-cc149b90a29d

Best regards,
-- 
David Heidelberg <david@ixit.cz>