From patchwork Mon Oct 19 21:10:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rob Clark X-Patchwork-Id: 11845269 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 87D3416BC for ; Mon, 19 Oct 2020 21:09:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5E140223FD for ; Mon, 19 Oct 2020 21:09:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="oJqXKuB+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732558AbgJSVJt (ORCPT ); Mon, 19 Oct 2020 17:09:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48150 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732580AbgJSVJr (ORCPT ); Mon, 19 Oct 2020 17:09:47 -0400 Received: from mail-pl1-x643.google.com (mail-pl1-x643.google.com [IPv6:2607:f8b0:4864:20::643]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 35CC2C0613CE; Mon, 19 Oct 2020 14:09:47 -0700 (PDT) Received: by mail-pl1-x643.google.com with SMTP id t4so433430plq.13; Mon, 19 Oct 2020 14:09:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=hCZ1KWvdDSxD2uHRX+9E2D0ZqwsYUoJfE7/jZEJ9F84=; b=oJqXKuB+GpDFpBUtfQqyDcZd3u0jtcQyEIVN7RTXzTAgfz1ZS/oxc63ht0+tQyP8Af GBkY1VoPfuAtck/Sl6PH8gGimU7gLvFGCvouWsDw/3sf/bLmuyqAePmo6LVRFKA8J+vH BBOJmKlIwo3wrxdtrmNJORS0t1FbHDB5JJtzQBPGNUW6DOzmSumZTU4AHnVQ2+mrUyO+ 1nZM90t08iOxlbV//xoXRL9d9R1QtoUCfr7fSUcgHwrnhtzeiHrLfx+jSpRoUbcUrvct 6a3TNA5GWbBYbQQSzHMDndPyTHizyzf8/15hVaFbC7wz1dFnH+a8LN4FJlmrB+opTb3c hcbQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=hCZ1KWvdDSxD2uHRX+9E2D0ZqwsYUoJfE7/jZEJ9F84=; b=lXvwO1U5C//hty1ZtYy138gT6GSpLWp/ZDcAsNhUVhUaf7jDc4WGueAmpQ2yvIIuMq nApJPhbHZPPPO/ZDJXSjnthHBO4zGhzYtNFQ9nTHaUKpnDfgmXmgE2/82GMYGKLczXAo HX8mnj8oIbmzZzT8PiQRHe401V31EED4/p3I4G9JTDzkS+oeITjzZ0xOBoAH9LIrBllE ACw/PD36JwMuTXQlEoGORvwzYxJNj/Fu8eS4DOL/1PhhQGoxtYyKaEnmSZw+xxuB9pdD dZNcd3HmGiAQ9adKdGX2jMHeJUD5oW+f+NeKyhoISFt3vs/xk25nBsrgP1tNKiiiHxm7 R77Q== X-Gm-Message-State: AOAM5304cVZ1Fb+0+TeK64dy4Zkl5ObmCU2zW5l/zwA0etTto1/7uGdY kzDaobol2CF46F8tGp0vxam43tOAmB5EUg== X-Google-Smtp-Source: ABdhPJzWpwqPKhjioG+JSQHkuy6g67waQRxTx9tkp/UhMtZA3wLeVAOcw3O8ude/cpWPukn8+DXzUg== X-Received: by 2002:a17:90a:4e0c:: with SMTP id n12mr1282766pjh.78.1603141786679; Mon, 19 Oct 2020 14:09:46 -0700 (PDT) Received: from localhost (c-73-25-156-94.hsd1.or.comcast.net. [73.25.156.94]) by smtp.gmail.com with ESMTPSA id z73sm669447pfc.75.2020.10.19.14.09.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 19 Oct 2020 14:09:45 -0700 (PDT) From: Rob Clark To: dri-devel@lists.freedesktop.org Cc: linux-arm-msm@vger.kernel.org, Rob Clark , Rob Clark , Sean Paul , David Airlie , Daniel Vetter , freedreno@lists.freedesktop.org (open list:DRM DRIVER FOR MSM ADRENO GPU), linux-kernel@vger.kernel.org (open list) Subject: [PATCH 3/3] drm/msm/atomic: Convert to per-CRTC kthread_work Date: Mon, 19 Oct 2020 14:10:53 -0700 Message-Id: <20201019211101.143327-4-robdclark@gmail.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20201019211101.143327-1-robdclark@gmail.com> References: <20201019211101.143327-1-robdclark@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Rob Clark Use a SCHED_FIFO kthread_worker for async atomic commits. We have a hard deadline if we don't want to miss a frame. Signed-off-by: Rob Clark --- drivers/gpu/drm/msm/msm_atomic.c | 25 ++++++++++++++++++++----- drivers/gpu/drm/msm/msm_drv.h | 3 ++- drivers/gpu/drm/msm/msm_kms.h | 17 +++++++++++++---- 3 files changed, 35 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c index 561bfa48841c..484438f1e028 100644 --- a/drivers/gpu/drm/msm/msm_atomic.c +++ b/drivers/gpu/drm/msm/msm_atomic.c @@ -103,14 +103,13 @@ static enum hrtimer_restart msm_atomic_pending_timer(struct hrtimer *t) { struct msm_pending_timer *timer = container_of(t, struct msm_pending_timer, timer); - struct msm_drm_private *priv = timer->kms->dev->dev_private; - queue_work(priv->wq, &timer->work); + kthread_queue_work(timer->worker, &timer->work); return HRTIMER_NORESTART; } -static void msm_atomic_pending_work(struct work_struct *work) +static void msm_atomic_pending_work(struct kthread_work *work) { struct msm_pending_timer *timer = container_of(work, struct msm_pending_timer, work); @@ -118,14 +117,30 @@ static void msm_atomic_pending_work(struct work_struct *work) msm_atomic_async_commit(timer->kms, timer->crtc_idx); } -void msm_atomic_init_pending_timer(struct msm_pending_timer *timer, +int msm_atomic_init_pending_timer(struct msm_pending_timer *timer, struct msm_kms *kms, int crtc_idx) { timer->kms = kms; timer->crtc_idx = crtc_idx; hrtimer_init(&timer->timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); timer->timer.function = msm_atomic_pending_timer; - INIT_WORK(&timer->work, msm_atomic_pending_work); + + timer->worker = kthread_create_worker(0, "atomic-worker-%d", crtc_idx); + if (IS_ERR(timer->worker)) { + int ret = PTR_ERR(timer->worker); + timer->worker = NULL; + return ret; + } + sched_set_fifo(timer->worker->task); + kthread_init_work(&timer->work, msm_atomic_pending_work); + + return 0; +} + +void msm_atomic_destroy_pending_timer(struct msm_pending_timer *timer) +{ + if (timer->worker) + kthread_destroy_worker(timer->worker); } static bool can_do_async(struct drm_atomic_state *state, diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h index 5308e636a90c..f869ed67b5da 100644 --- a/drivers/gpu/drm/msm/msm_drv.h +++ b/drivers/gpu/drm/msm/msm_drv.h @@ -235,8 +235,9 @@ struct msm_pending_timer; int msm_atomic_prepare_fb(struct drm_plane *plane, struct drm_plane_state *new_state); -void msm_atomic_init_pending_timer(struct msm_pending_timer *timer, +int msm_atomic_init_pending_timer(struct msm_pending_timer *timer, struct msm_kms *kms, int crtc_idx); +void msm_atomic_destroy_pending_timer(struct msm_pending_timer *timer); void msm_atomic_commit_tail(struct drm_atomic_state *state); struct drm_atomic_state *msm_atomic_state_alloc(struct drm_device *dev); void msm_atomic_state_clear(struct drm_atomic_state *state); diff --git a/drivers/gpu/drm/msm/msm_kms.h b/drivers/gpu/drm/msm/msm_kms.h index 0be9e6487556..26321c13f950 100644 --- a/drivers/gpu/drm/msm/msm_kms.h +++ b/drivers/gpu/drm/msm/msm_kms.h @@ -136,7 +136,8 @@ struct msm_kms; */ struct msm_pending_timer { struct hrtimer timer; - struct work_struct work; + struct kthread_work work; + struct kthread_worker *worker; struct msm_kms *kms; unsigned crtc_idx; }; @@ -163,19 +164,27 @@ struct msm_kms { static inline int msm_kms_init(struct msm_kms *kms, const struct msm_kms_funcs *funcs) { - unsigned i; + unsigned i, ret; mutex_init(&kms->commit_lock); kms->funcs = funcs; - for (i = 0; i < ARRAY_SIZE(kms->pending_timers); i++) - msm_atomic_init_pending_timer(&kms->pending_timers[i], kms, i); + for (i = 0; i < ARRAY_SIZE(kms->pending_timers); i++) { + ret = msm_atomic_init_pending_timer(&kms->pending_timers[i], kms, i); + if (ret) { + return ret; + } + } return 0; } static inline void msm_kms_destroy(struct msm_kms *kms) { + unsigned i; + + for (i = 0; i < ARRAY_SIZE(kms->pending_timers); i++) + msm_atomic_destroy_pending_timer(&kms->pending_timers[i]); } struct msm_kms *mdp4_kms_init(struct drm_device *dev);