From patchwork Wed May 22 05:33:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maarten Lankhorst X-Patchwork-Id: 13670425 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9F9F7C25B7E for ; Wed, 22 May 2024 05:33:27 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1AEBE10E4C9; Wed, 22 May 2024 05:33:25 +0000 (UTC) Received: from mblankhorst.nl (lankhorst.se [141.105.120.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id CEC1D10E1E2; Wed, 22 May 2024 05:33:22 +0000 (UTC) From: Maarten Lankhorst To: intel-gfx@lists.freedesktop.org Cc: intel-xe@lists.freedesktop.org, Maarten Lankhorst , Chaitanya Kumar Borah Subject: [v6 1/3] drm: Add drm_vblank_work_flush_all(). Date: Wed, 22 May 2024 07:33:39 +0200 Message-ID: <20240522053341.137592-2-maarten.lankhorst@linux.intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240522053341.137592-1-maarten.lankhorst@linux.intel.com> References: <20240522053341.137592-1-maarten.lankhorst@linux.intel.com> MIME-Version: 1.0 X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" In some cases we want to flush all vblank work, right before vblank_off for example. Add a simple function to make this possible. Check that both pending_work and running work are empty when flushing. Co-Developed-by: Chaitanya Kumar Borah Signed-off-by: Maarten Lankhorst Reviewed-by: Uma Shankar --- drivers/gpu/drm/drm_vblank_work.c | 22 ++++++++++++++++++++++ include/drm/drm_vblank_work.h | 2 ++ 2 files changed, 24 insertions(+) diff --git a/drivers/gpu/drm/drm_vblank_work.c b/drivers/gpu/drm/drm_vblank_work.c index 4fe9b1d3b00f..1752ffb44e1d 100644 --- a/drivers/gpu/drm/drm_vblank_work.c +++ b/drivers/gpu/drm/drm_vblank_work.c @@ -232,6 +232,28 @@ void drm_vblank_work_flush(struct drm_vblank_work *work) } EXPORT_SYMBOL(drm_vblank_work_flush); +/** + * drm_vblank_work_flush_all - flush all currently pending vblank work on crtc. + * @crtc: crtc for which vblank work to flush + * + * Wait until all currently queued vblank work on @crtc + * has finished executing once. + */ +void drm_vblank_work_flush_all(struct drm_crtc *crtc) +{ + struct drm_device *dev = crtc->dev; + struct drm_vblank_crtc *vblank = &dev->vblank[drm_crtc_index(crtc)]; + + spin_lock_irq(&dev->event_lock); + wait_event_lock_irq(vblank->work_wait_queue, + list_empty(&vblank->pending_work), + dev->event_lock); + spin_unlock_irq(&dev->event_lock); + + kthread_flush_worker(vblank->worker); +} +EXPORT_SYMBOL(drm_vblank_work_flush_all); + /** * drm_vblank_work_init - initialize a vblank work item * @work: vblank work item diff --git a/include/drm/drm_vblank_work.h b/include/drm/drm_vblank_work.h index eb41d0810c4f..e04d436b7297 100644 --- a/include/drm/drm_vblank_work.h +++ b/include/drm/drm_vblank_work.h @@ -17,6 +17,7 @@ struct drm_crtc; * drm_vblank_work_init() * drm_vblank_work_cancel_sync() * drm_vblank_work_flush() + * drm_vblank_work_flush_all() */ struct drm_vblank_work { /** @@ -67,5 +68,6 @@ void drm_vblank_work_init(struct drm_vblank_work *work, struct drm_crtc *crtc, void (*func)(struct kthread_work *work)); bool drm_vblank_work_cancel_sync(struct drm_vblank_work *work); void drm_vblank_work_flush(struct drm_vblank_work *work); +void drm_vblank_work_flush_all(struct drm_crtc *crtc); #endif /* !_DRM_VBLANK_WORK_H_ */