Claude review: drm/bridge: display-connector: detect DP state if cable is plugged on boot

[Claude Code Review Bot <claude-review@example.com>]

Overall Series Review

Subject: drm/bridge: display-connector: detect DP state if cable is plugged on boot
Author: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patches: 3
Reviewed: 2026-05-16T11:28:15.749364

---

This is a well-targeted 2-patch series from Dmitry Baryshkov fixing a real boot-time HPD detection problem for DisplayPort connectors using the `display-connector` bridge driver. The core issue: if a DP cable is plugged in before the system boots, the HPD GPIO line is already asserted, so no edge interrupt fires, and the DP controller never learns about the connected display.

The approach is sound: (1) defer IRQ enablement from probe to the `hpd_enable` bridge callback, and (2) schedule a work item to send an initial HPD notification for DP connectors. The work_struct is correctly used to avoid a mutex deadlock — `drm_bridge_hpd_enable()` holds `bridge->hpd_mutex` when calling `hpd_enable`, and `drm_bridge_hpd_notify()` also takes that same mutex, so calling it directly from `hpd_enable` would deadlock.

Both patches are clean, minimal, and correctly ordered. A couple of minor issues noted below.

**Verdict: Looks good, minor nits only.**

---

---
Generated by Claude Code Patch Reviewer