From nobody Thu Sep 11 04:18:08 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B22C0C64ED9 for ; Mon, 20 Feb 2023 20:19:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232087AbjBTUT5 (ORCPT ); Mon, 20 Feb 2023 15:19:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37380 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232679AbjBTUTi (ORCPT ); Mon, 20 Feb 2023 15:19:38 -0500 Received: from mail-pl1-x62d.google.com (mail-pl1-x62d.google.com [IPv6:2607:f8b0:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 228771EBF0 for ; Mon, 20 Feb 2023 12:19:33 -0800 (PST) Received: by mail-pl1-x62d.google.com with SMTP id bh1so2745792plb.11 for ; Mon, 20 Feb 2023 12:19:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=5Jl0bAAXIZTjQ7NsDAeqTzIEhvjQzgg5/X7BsK4u81Y=; b=VWGYtfqNhp7B6nf1c5rcB1hn1/aTMiBMh/TisbyUXTPDYchTD7dH8S55BhZKeSEIr+ 03hj8zQYZMESK/6c4d3fRxa/w4WooAzdJBPJ8/VWpaF06G1aHxdlKB29U3aBoRxl8pG9 lhz4VFqMYDjNn7utqgYjWHabzq8ZYsRn9/jLbtpnATAFjeV84tvNiTTmjW21dkGa87Bo BCdG0VIoPT5IG6WL3vCWR5Cs/9pu+OSNC6ytsz3L6iomug5Ys/ZXtW1WbgYfoiPaWtwy eRK2/hsZTxMfAbRSugzRZV+8A5OAWYdt0Dxwq8bO0x5KyZMagHwy/xs0lWT9bszYL27m w8bw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=5Jl0bAAXIZTjQ7NsDAeqTzIEhvjQzgg5/X7BsK4u81Y=; b=DnNTepUIXS+W4Iheiz3LPfY/B6/bSRtQvkqtSjgKF60ivPfp5HO7r22DBSAMr6pmvK pT/AZ0fyRayINMA8HGFR5Tp+DIwUycX6KVjxi15Vcs2DhFV8r8agjsJMFKw9FhdHdcds MNFadcatavM/bL+Nzre5d8/Yc59I4XfFMa3OPZdOkWWTGwUsBK+jtUQUqc3GhDP4UEVu V/BlA5n/1JHoPZbsyrbqAHHOaxlYR7Aj/h/I05qoZM1H5IAu30F2MeEzg3xQBuEsEXFs AE1ACPEJvQb22odmz7ofG1I2B7CvmIsh0TW5bqFvFKVxyRVpL0cAYOlyKeFKVyv3dPDM A23g== X-Gm-Message-State: AO0yUKWuOco3BbzK3ScBY2EaCVqK1PMnqfccQKIgt0Qs5O0fOgaRj/Wv qozuwdf3Fa/3SmXnB3sI50o= X-Google-Smtp-Source: AK7set+q3MKo5iZVfbDma9lHblnO0T/NKkpxdHihd2LIe6SBmUPSnRLrjIdwXidmbST3DQEMqrXm3A== X-Received: by 2002:a17:902:d4c3:b0:19c:17d1:28a4 with SMTP id o3-20020a170902d4c300b0019c17d128a4mr3168962plg.67.1676924372594; Mon, 20 Feb 2023 12:19:32 -0800 (PST) Received: from localhost (c-73-67-135-195.hsd1.or.comcast.net. [73.67.135.195]) by smtp.gmail.com with ESMTPSA id x5-20020a170902ea8500b0019c32968271sm1910780plb.11.2023.02.20.12.19.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Feb 2023 12:19:32 -0800 (PST) From: Rob Clark To: dri-devel@lists.freedesktop.org Cc: freedreno@lists.freedesktop.org, Daniel Vetter , =?UTF-8?q?Christian=20K=C3=B6nig?= , =?UTF-8?q?Michel=20D=C3=A4nzer?= , Tvrtko Ursulin , Rodrigo Vivi , Alex Deucher , Pekka Paalanen , Simon Ser , Rob Clark , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , linux-kernel@vger.kernel.org (open list) Subject: [PATCH v5 10/14] drm/vblank: Add helper to get next vblank time Date: Mon, 20 Feb 2023 12:18:57 -0800 Message-Id: <20230220201916.1822214-11-robdclark@gmail.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230220201916.1822214-1-robdclark@gmail.com> References: <20230220201916.1822214-1-robdclark@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Rob Clark Will be used in the next commit to set a deadline on fences that an atomic update is waiting on. Signed-off-by: Rob Clark --- drivers/gpu/drm/drm_vblank.c | 32 ++++++++++++++++++++++++++++++++ include/drm/drm_vblank.h | 1 + 2 files changed, 33 insertions(+) diff --git a/drivers/gpu/drm/drm_vblank.c b/drivers/gpu/drm/drm_vblank.c index 2ff31717a3de..caf25ebb34c5 100644 --- a/drivers/gpu/drm/drm_vblank.c +++ b/drivers/gpu/drm/drm_vblank.c @@ -980,6 +980,38 @@ u64 drm_crtc_vblank_count_and_time(struct drm_crtc *cr= tc, } EXPORT_SYMBOL(drm_crtc_vblank_count_and_time); =20 +/** + * drm_crtc_next_vblank_time - calculate the time of the next vblank + * @crtc: the crtc for which to calculate next vblank time + * @vblanktime: pointer to time to receive the next vblank timestamp. + * + * Calculate the expected time of the next vblank based on time of previous + * vblank and frame duration + */ +int drm_crtc_next_vblank_time(struct drm_crtc *crtc, ktime_t *vblanktime) +{ + unsigned int pipe =3D drm_crtc_index(crtc); + struct drm_vblank_crtc *vblank =3D &crtc->dev->vblank[pipe]; + u64 count; + + if (!vblank->framedur_ns) + return -EINVAL; + + count =3D drm_vblank_count_and_time(crtc->dev, pipe, vblanktime); + + /* + * If we don't get a valid count, then we probably also don't + * have a valid time: + */ + if (!count) + return -EINVAL; + + *vblanktime =3D ktime_add(*vblanktime, ns_to_ktime(vblank->framedur_ns)); + + return 0; +} +EXPORT_SYMBOL(drm_crtc_next_vblank_time); + static void send_vblank_event(struct drm_device *dev, struct drm_pending_vblank_event *e, u64 seq, ktime_t now) diff --git a/include/drm/drm_vblank.h b/include/drm/drm_vblank.h index 733a3e2d1d10..a63bc2c92f3c 100644 --- a/include/drm/drm_vblank.h +++ b/include/drm/drm_vblank.h @@ -230,6 +230,7 @@ bool drm_dev_has_vblank(const struct drm_device *dev); u64 drm_crtc_vblank_count(struct drm_crtc *crtc); u64 drm_crtc_vblank_count_and_time(struct drm_crtc *crtc, ktime_t *vblanktime); +int drm_crtc_next_vblank_time(struct drm_crtc *crtc, ktime_t *vblanktime); void drm_crtc_send_vblank_event(struct drm_crtc *crtc, struct drm_pending_vblank_event *e); void drm_crtc_arm_vblank_event(struct drm_crtc *crtc, --=20 2.39.1