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drm/hibmc: add README for driver architecture summary#1

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jackYoung0915 wants to merge 1 commit into
KP-6.6-basefrom
cursor/hibmc-b2b9
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drm/hibmc: add README for driver architecture summary#1
jackYoung0915 wants to merge 1 commit into
KP-6.6-basefrom
cursor/hibmc-b2b9

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Summary

  • add drivers/gpu/drm/hisilicon/hibmc/README.md
  • document the HIBMC DRM driver architecture and module responsibilities
  • summarize init flow, KMS/CRTC/plane behavior, VGA/DDC path, DP link training path, interrupt model, and debugfs knobs

Validation

  • documentation-only change
  • no build or runtime behavior changes
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Co-authored-by: Slim6882 <jackYoung0915@users.noreply.github.com>
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