From patchwork Wed Mar 28 19:06:51 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Paul X-Patchwork-Id: 10313913 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 72F8D60467 for ; Wed, 28 Mar 2018 19:08:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6246928F81 for ; Wed, 28 Mar 2018 19:08:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 56E2F28FBE; Wed, 28 Mar 2018 19:08:58 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.1 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id CAEBA28F81 for ; Wed, 28 Mar 2018 19:08:57 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D5E256E69B; Wed, 28 Mar 2018 19:08:56 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-yw0-x241.google.com (mail-yw0-x241.google.com [IPv6:2607:f8b0:4002:c05::241]) by gabe.freedesktop.org (Postfix) with ESMTPS id D258A6E695 for ; Wed, 28 Mar 2018 19:08:54 +0000 (UTC) Received: by mail-yw0-x241.google.com with SMTP id z82so1160523ywd.9 for ; Wed, 28 Mar 2018 12:08:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=Itvak0JZfnUxErfpbbMFwpE0Z0XzNlfz1T2Dn6c404c=; b=nNPMbHKH9aZRtJxMhTr/O8KJkFfmLkT7qxPJ3vUgUmFxnCXeYE42dwF/XTwF365GAF KUFNh5IFW+y9FPcvnsXzT1v5+2QIjP2qLpVjzolI/d2a3SQdtl/av42P2PFmTCgadF6c xfWbzPt7eKx4YkhpAH3FvmNEbchLeltAYiiXs= 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; bh=Itvak0JZfnUxErfpbbMFwpE0Z0XzNlfz1T2Dn6c404c=; b=WXInk49T3db+2huGt98ZMIKsFvLgwfJgTpPIxvCZ/q0xyXEjNB53qGMCBDDv6WewRc b3GfD8Ko/L9XnBecPFqVmQBpm6to3cEDBIoKRjIoS9b3YsJzYSIvZbK7ERvcZjvmNIcY 8TnumleY55VCZgBR6VxR0LusnqWNSWz3Pxm/xATRwwVI+4rx9Sxzl+9E8E9nT/Y+VDCN YORBg9rPhGbJQkXvFO1NLF2La/kf6qkxZ3JxaRmPp1bw+vDtTEUEEkIpZHYhGcjXLUX6 oGQiKHLCk7hAA+jiUH0dz8XcX8mJ4iSEaj+zVeg+nTMwKLtv9OfpjJjuvUk6XcG0CMrW ygnQ== X-Gm-Message-State: AElRT7FAn8uqVPVxIBoSc6+vtKS1EkT6eFwPSkR7laXqXLZCzvGiTyrF 1ciPLfVwq1jhbaZXOaR7OzKlXQ== X-Google-Smtp-Source: AIpwx48JxPmSehRXhX3vn18b8IFLRzhoB9daiZJVbZIUquofkiFuF6UuWw9zJn9B7+nd+zwko7GoAA== X-Received: by 10.129.96.213 with SMTP id u204mr3039846ywb.278.1522264133816; Wed, 28 Mar 2018 12:08:53 -0700 (PDT) Received: from rosewood.cam.corp.google.com ([2620:0:1013:11:ad55:b1db:adfe:3b9f]) by smtp.gmail.com with ESMTPSA id z6sm1621054ywb.95.2018.03.28.12.08.53 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 28 Mar 2018 12:08:53 -0700 (PDT) From: Sean Paul To: freedreno@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: [PATCH v2 5/6] drm/msm: Remove msm_commit/worker, use atomic helper commit Date: Wed, 28 Mar 2018 15:06:51 -0400 Message-Id: <20180328190657.218661-6-seanpaul@chromium.org> X-Mailer: git-send-email 2.17.0.rc1.321.gba9d0f2565-goog In-Reply-To: <20180328190657.218661-1-seanpaul@chromium.org> References: <20180328190657.218661-1-seanpaul@chromium.org> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-kernel@vger.kernel.org, abhinavk@codeaurora.org, hoegsberg@chromium.org MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Moving further towards switching fully to the the atomic helpers, this patch removes the hand-rolled worker nonblock commit code and uses the atomic helpers commit_work model. Changes in v2: - Remove commit_destroy() - Shuffle order of commit_tail calls to further serialize commits - Use stall in swap_state to avoid abandoned events on disable Signed-off-by: Sean Paul --- drivers/gpu/drm/msm/msm_atomic.c | 153 +++++++++---------------------- drivers/gpu/drm/msm/msm_drv.c | 1 - drivers/gpu/drm/msm/msm_drv.h | 4 - 3 files changed, 42 insertions(+), 116 deletions(-) diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c index 671a18ee977d..52249565cc03 100644 --- a/drivers/gpu/drm/msm/msm_atomic.c +++ b/drivers/gpu/drm/msm/msm_atomic.c @@ -20,66 +20,6 @@ #include "msm_gem.h" #include "msm_fence.h" -struct msm_commit { - struct drm_device *dev; - struct drm_atomic_state *state; - struct work_struct work; - uint32_t crtc_mask; -}; - -static void commit_worker(struct work_struct *work); - -/* block until specified crtcs are no longer pending update, and - * atomically mark them as pending update - */ -static int start_atomic(struct msm_drm_private *priv, uint32_t crtc_mask) -{ - int ret; - - spin_lock(&priv->pending_crtcs_event.lock); - ret = wait_event_interruptible_locked(priv->pending_crtcs_event, - !(priv->pending_crtcs & crtc_mask)); - if (ret == 0) { - DBG("start: %08x", crtc_mask); - priv->pending_crtcs |= crtc_mask; - } - spin_unlock(&priv->pending_crtcs_event.lock); - - return ret; -} - -/* clear specified crtcs (no longer pending update) - */ -static void end_atomic(struct msm_drm_private *priv, uint32_t crtc_mask) -{ - spin_lock(&priv->pending_crtcs_event.lock); - DBG("end: %08x", crtc_mask); - priv->pending_crtcs &= ~crtc_mask; - wake_up_all_locked(&priv->pending_crtcs_event); - spin_unlock(&priv->pending_crtcs_event.lock); -} - -static struct msm_commit *commit_init(struct drm_atomic_state *state) -{ - struct msm_commit *c = kzalloc(sizeof(*c), GFP_KERNEL); - - if (!c) - return NULL; - - c->dev = state->dev; - c->state = state; - - INIT_WORK(&c->work, commit_worker); - - return c; -} - -static void commit_destroy(struct msm_commit *c) -{ - end_atomic(c->dev->dev_private, c->crtc_mask); - kfree(c); -} - static void msm_atomic_wait_for_commit_done(struct drm_device *dev, struct drm_atomic_state *old_state) { @@ -126,31 +66,37 @@ static void msm_atomic_commit_tail(struct drm_atomic_state *state) msm_atomic_wait_for_commit_done(dev, state); - drm_atomic_helper_cleanup_planes(dev, state); - kms->funcs->complete_commit(kms, state); + + drm_atomic_helper_wait_for_vblanks(dev, state); + + drm_atomic_helper_commit_hw_done(state); + + drm_atomic_helper_cleanup_planes(dev, state); } /* The (potentially) asynchronous part of the commit. At this point * nothing can fail short of armageddon. */ -static void complete_commit(struct msm_commit *c) +static void commit_tail(struct drm_atomic_state *state) { - struct drm_atomic_state *state = c->state; - struct drm_device *dev = state->dev; + drm_atomic_helper_wait_for_fences(state->dev, state, false); - drm_atomic_helper_wait_for_fences(dev, state, false); + drm_atomic_helper_wait_for_dependencies(state); msm_atomic_commit_tail(state); - drm_atomic_state_put(state); + drm_atomic_helper_commit_cleanup_done(state); - commit_destroy(c); + drm_atomic_state_put(state); } -static void commit_worker(struct work_struct *work) +static void commit_work(struct work_struct *work) { - complete_commit(container_of(work, struct msm_commit, work)); + struct drm_atomic_state *state = container_of(work, + struct drm_atomic_state, + commit_work); + commit_tail(state); } /** @@ -169,17 +115,12 @@ int msm_atomic_commit(struct drm_device *dev, struct drm_atomic_state *state, bool nonblock) { struct msm_drm_private *priv = dev->dev_private; - struct msm_commit *c; struct drm_crtc *crtc; struct drm_crtc_state *crtc_state; struct drm_plane *plane; struct drm_plane_state *old_plane_state, *new_plane_state; int i, ret; - ret = drm_atomic_helper_prepare_planes(dev, state); - if (ret) - return ret; - /* * Note that plane->atomic_async_check() should fail if we need * to re-assign hwpipe or anything that touches global atomic @@ -187,45 +128,39 @@ int msm_atomic_commit(struct drm_device *dev, * cases. */ if (state->async_update) { + ret = drm_atomic_helper_prepare_planes(dev, state); + if (ret) + return ret; + drm_atomic_helper_async_commit(dev, state); drm_atomic_helper_cleanup_planes(dev, state); return 0; } - c = commit_init(state); - if (!c) { - ret = -ENOMEM; - goto error; - } + ret = drm_atomic_helper_setup_commit(state, nonblock); + if (ret) + return ret; - /* - * Figure out what crtcs we have: - */ - for_each_new_crtc_in_state(state, crtc, crtc_state, i) - c->crtc_mask |= drm_crtc_mask(crtc); + INIT_WORK(&state->commit_work, commit_work); - /* - * Figure out what fence to wait for: - */ - for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { - if ((new_plane_state->fb != old_plane_state->fb) && new_plane_state->fb) { - struct drm_gem_object *obj = msm_framebuffer_bo(new_plane_state->fb, 0); - struct msm_gem_object *msm_obj = to_msm_bo(obj); - struct dma_fence *fence = reservation_object_get_excl_rcu(msm_obj->resv); - - drm_atomic_set_fence_for_plane(new_plane_state, fence); - } + ret = drm_atomic_helper_prepare_planes(dev, state); + if (ret) + return ret; + + if (!nonblock) { + ret = drm_atomic_helper_wait_for_fences(dev, state, true); + if (ret) + goto error; } /* - * Wait for pending updates on any of the same crtc's and then - * mark our set of crtc's as busy: + * This is the point of no return - everything below never fails except + * when the hw goes bonghits. Which means we can commit the new state on + * the software side now. + * + * swap driver private state while still holding state_lock */ - ret = start_atomic(dev->dev_private, c->crtc_mask); - if (ret) - goto err_free; - - BUG_ON(drm_atomic_helper_swap_state(state, false) < 0); + BUG_ON(drm_atomic_helper_swap_state(state, true) < 0); /* * Everything below can be run asynchronously without the need to grab @@ -244,17 +179,13 @@ int msm_atomic_commit(struct drm_device *dev, */ drm_atomic_state_get(state); - if (nonblock) { - queue_work(priv->atomic_wq, &c->work); - return 0; - } - - complete_commit(c); + if (nonblock) + queue_work(system_unbound_wq, &state->commit_work); + else + commit_tail(state); return 0; -err_free: - kfree(c); error: drm_atomic_helper_cleanup_planes(dev, state); return ret; diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index 7e8f640062ef..d1a45a68c287 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -459,7 +459,6 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv) priv->wq = alloc_ordered_workqueue("msm", 0); priv->atomic_wq = alloc_ordered_workqueue("msm:atomic", 0); - init_waitqueue_head(&priv->pending_crtcs_event); INIT_LIST_HEAD(&priv->inactive_list); INIT_LIST_HEAD(&priv->vblank_ctrl.event_list); diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h index c5b8c989b859..b89fa5186eb8 100644 --- a/drivers/gpu/drm/msm/msm_drv.h +++ b/drivers/gpu/drm/msm/msm_drv.h @@ -117,10 +117,6 @@ struct msm_drm_private { struct workqueue_struct *wq; struct workqueue_struct *atomic_wq; - /* crtcs pending async atomic updates: */ - uint32_t pending_crtcs; - wait_queue_head_t pending_crtcs_event; - unsigned int num_planes; struct drm_plane *planes[16];