Claude review: drm/bridge: handle refcounting for bridge-only callers of drm_of_find_panel_or_bridge()

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Overall Series Review

Subject: drm/bridge: handle refcounting for bridge-only callers of drm_of_find_panel_or_bridge()
Author: Luca Ceresoli <luca.ceresoli@bootlin.com>
Patches: 13
Reviewed: 2026-05-16T15:02:22.126708

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This is a well-structured, incremental series that continues Luca Ceresoli's long-running work to add proper refcounting to DRM bridges. The series introduces `of_drm_get_bridge_by_endpoint()` as a refcount-aware replacement for bridge-only calls to the deprecated `drm_of_find_panel_or_bridge()`, converts all bridge-only callers, and then forbids that usage pattern going forward.

The approach is sound: the new API is simpler (returns the bridge directly instead of via double-pointer), safer (refcounted), and each driver conversion correctly handles the lifecycle of the returned bridge — either via the auto-put `bridge.next_bridge` field, explicit `drm_bridge_put()`, or the `__free(drm_bridge_put)` cleanup annotation.

All patches are already reviewed/acked except patches 3 and 4. The series is at v6, with the main changes across versions being error handling improvements. The code quality is high and the pattern is consistent.

**No blocking issues found.** A couple of very minor nits below.

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