From: Claude Code Review Bot <claude-review@example.com>
To: dri-devel-reviews@example.com
Subject: Claude review: drm/vblank: Deferred Enable and Disable
Date: Fri, 27 Feb 2026 14:40:52 +1000 [thread overview]
Message-ID: <review-overall-20260224212639.390768-1-sunpeng.li@amd.com> (raw)
In-Reply-To: <20260224212639.390768-1-sunpeng.li@amd.com>
Overall Series Review
Subject: drm/vblank: Deferred Enable and Disable
Author: <sunpeng.li@amd.com>
Patches: 7
Reviewed: 2026-02-27T14:40:52.376367
---
This series introduces **deferred vblank enable/disable** to the DRM vblank core, motivated by AMD's IPS (Idle Power States) feature where the entire DCN block can be power-gated, requiring the `dc_lock` mutex (blocking) to disallow idle optimizations before accessing vblank HW registers. The approach is well-motivated and the cover letter does a good job explaining the tradeoffs vs. the previously attempted `vblank_prepare()` approach.
However, there are **several concerns** with the current implementation, primarily around race conditions between deferred work and `drm_crtc_vblank_off()`, unconditional resource allocation, and `crtc->state` access from worker context. The core idea is sound but needs another iteration to tighten the synchronization.
---
---
Generated by Claude Code Patch Reviewer
next prev parent reply other threads:[~2026-02-27 4:40 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-24 21:26 [PATCH 0/5] drm/vblank: Deferred Enable and Disable sunpeng.li
2026-02-24 21:26 ` [PATCH 1/5] drm/vblank: Add drm_crtc_vblank_is_off() helper sunpeng.li
2026-02-27 4:40 ` Claude review: " Claude Code Review Bot
2026-02-24 21:26 ` [PATCH 2/5] drm/vblank: Introduce deferred vblank enable/disable sunpeng.li
2026-02-25 4:42 ` kernel test robot
2026-02-27 4:40 ` Claude review: " Claude Code Review Bot
2026-02-24 21:26 ` [PATCH 3/5] drm/amd/display: Refactor amdgpu_dm_crtc_set_vblank sunpeng.li
2026-02-27 4:40 ` Claude review: " Claude Code Review Bot
2026-02-24 21:26 ` [PATCH 4/5] drm/amd/display: Implement deferred vblanks on IPS platforms sunpeng.li
2026-02-27 4:40 ` Claude review: " Claude Code Review Bot
2026-02-24 21:26 ` [PATCH 5/5] drm/vblank: Add some debugging trace events sunpeng.li
2026-02-27 4:40 ` Claude review: " Claude Code Review Bot
2026-02-27 4:40 ` Claude Code Review Bot [this message]
-- strict thread matches above, loose matches on Subject: below --
2026-03-23 20:27 [PATCH v2 0/5] drm/vblank: Deferred Enable and Disable sunpeng.li
2026-03-24 21:22 ` Claude review: " Claude Code Review Bot
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