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>
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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
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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>