From patchwork Wed Sep 14 12:54:58 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomasz Figa X-Patchwork-Id: 9331395 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 B612560231 for ; Wed, 14 Sep 2016 13:00:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A66DF29D8C for ; Wed, 14 Sep 2016 13:00:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9AAE729DC2; Wed, 14 Sep 2016 13:00:58 +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=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id DB25229D8C for ; Wed, 14 Sep 2016 13:00:55 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bk9mR-0000Us-E9; Wed, 14 Sep 2016 12:59:11 +0000 Received: from mail-pf0-x22e.google.com ([2607:f8b0:400e:c00::22e]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bk9j1-0007EE-DN for linux-arm-kernel@lists.infradead.org; Wed, 14 Sep 2016 12:55:40 +0000 Received: by mail-pf0-x22e.google.com with SMTP id p64so5578327pfb.1 for ; Wed, 14 Sep 2016 05:55:21 -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=ufYJoGzUN04sPpE18AY4s73CStGa7uFC/kgLAbtuZ7c=; b=Ubhkuv4z1fszlC8ZL8qnPyPBoi3aaobadYY6bB+9fkoK/jJI8NI/RBXJi5YusvtziE NYgeo38XQooUYceoetDjKMq2XO3qRUkBJlvdXRtoyHqlxZ6XMuZph2kruYE99UzOpmEE q7hn1vb10uHM6DCn1Xfjy3GEOo9cmwKuHn0+o= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=ufYJoGzUN04sPpE18AY4s73CStGa7uFC/kgLAbtuZ7c=; b=IBrnJb/UXK63ZGRFihAaMmh+pz3aynU3CfiX864PKRW4r2zk2WGrXnd6OCQhsVPBIS PXVc86l2ba+7DxZnLB5D3sbLOis5mbmMTq2qInpEDoYosNuOVMs35j5LBe6dQFlqOy8W 4wNEu2be+MiaImLWAQlmrPWUauvxap1+ddcYzNjBsXyGLt7BGcSx06i4kdr6KPT8sTEg Ig5ICTb9/rkKdIID6/jcgsnYyMrUYlAvqq3nzbUXy3Ljj29ekNKMUMb5MMiA0veOjX6e WuYD0rvysrqs9+YXIR/M3pzj+5kd5nSer/+NRAx89XLGBXMWxqYm2Sx04sUkOmTsiDk9 qS9g== X-Gm-Message-State: AE9vXwPSFKf/IXuSazgOSG0ayXEDg09FTmaIUTZuOWLnc3SsOLKNak3FEz+0OCUrbI7eAldn X-Received: by 10.98.222.3 with SMTP id h3mr4214804pfg.146.1473857721208; Wed, 14 Sep 2016 05:55:21 -0700 (PDT) Received: from basement.tok.corp.google.com ([100.103.3.207]) by smtp.gmail.com with ESMTPSA id t7sm5601309paz.21.2016.09.14.05.55.18 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 14 Sep 2016 05:55:20 -0700 (PDT) From: Tomasz Figa To: dri-devel@lists.freedesktop.org Subject: [PATCH 5/8] drm/rockchip: Replace custom wait_for_vblanks with helper Date: Wed, 14 Sep 2016 21:54:58 +0900 Message-Id: <1473857701-9250-6-git-send-email-tfiga@chromium.org> X-Mailer: git-send-email 2.8.0.rc3.226.g39d4020 In-Reply-To: <1473857701-9250-1-git-send-email-tfiga@chromium.org> References: <1473857701-9250-1-git-send-email-tfiga@chromium.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160914_055539_593210_354F34FB X-CRM114-Status: GOOD ( 15.97 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Heiko Stuebner , David Airlie , linux-kernel@vger.kernel.org, Daniel Kurtz , Tomasz Figa , linux-rockchip@lists.infradead.org, Sean Paul , linux-arm-kernel@lists.infradead.org, Mark Yao MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Currently the driver uses a custom function to wait for flip to complete after an atomic commit. It was needed before because of two problems: - there is no hardware vblank counter, so the original helper would have a race condition with the vblank interrupt, - the driver didn't support unreferencing cursor framebuffers asynchronously to the commit, which was what the helper expected. Since both problems have been solved by previous patches, we can now make the driver use the generic helper and remove custom waiting code. Signed-off-by: Tomasz Figa --- drivers/gpu/drm/rockchip/rockchip_drm_drv.h | 1 - drivers/gpu/drm/rockchip/rockchip_drm_fb.c | 64 +---------------------------- drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 14 ------- 3 files changed, 1 insertion(+), 78 deletions(-) diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h index 5c69845..fb6226c 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h @@ -39,7 +39,6 @@ struct drm_connector; struct rockchip_crtc_funcs { int (*enable_vblank)(struct drm_crtc *crtc); void (*disable_vblank)(struct drm_crtc *crtc); - void (*wait_for_update)(struct drm_crtc *crtc); }; struct rockchip_crtc_state { diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c index 9890ecc..0f6eda0 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c @@ -174,68 +174,6 @@ static void rockchip_drm_output_poll_changed(struct drm_device *dev) drm_fb_helper_hotplug_event(fb_helper); } -static void rockchip_crtc_wait_for_update(struct drm_crtc *crtc) -{ - struct rockchip_drm_private *priv = crtc->dev->dev_private; - int pipe = drm_crtc_index(crtc); - const struct rockchip_crtc_funcs *crtc_funcs = priv->crtc_funcs[pipe]; - - if (crtc_funcs && crtc_funcs->wait_for_update) - crtc_funcs->wait_for_update(crtc); -} - -/* - * We can't use drm_atomic_helper_wait_for_vblanks() because rk3288 and rk3066 - * have hardware counters for neither vblanks nor scanlines, which results in - * a race where: - * | <-- HW vsync irq and reg take effect - * plane_commit --> | - * get_vblank and wait --> | - * | <-- handle_vblank, vblank->count + 1 - * cleanup_fb --> | - * iommu crash --> | - * | <-- HW vsync irq and reg take effect - * - * This function is equivalent but uses rockchip_crtc_wait_for_update() instead - * of waiting for vblank_count to change. - */ -static void -rockchip_atomic_wait_for_complete(struct drm_device *dev, struct drm_atomic_state *old_state) -{ - struct drm_crtc_state *old_crtc_state; - struct drm_crtc *crtc; - int i, ret; - - for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { - /* No one cares about the old state, so abuse it for tracking - * and store whether we hold a vblank reference (and should do a - * vblank wait) in the ->enable boolean. - */ - old_crtc_state->enable = false; - - if (!crtc->state->active) - continue; - - if (!drm_atomic_helper_framebuffer_changed(dev, - old_state, crtc)) - continue; - - ret = drm_crtc_vblank_get(crtc); - if (ret != 0) - continue; - - old_crtc_state->enable = true; - } - - for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { - if (!old_crtc_state->enable) - continue; - - rockchip_crtc_wait_for_update(crtc); - drm_crtc_vblank_put(crtc); - } -} - static void rockchip_atomic_commit_tail(struct drm_atomic_state *state) { @@ -250,7 +188,7 @@ rockchip_atomic_commit_tail(struct drm_atomic_state *state) drm_atomic_helper_commit_hw_done(state); - rockchip_atomic_wait_for_complete(dev, state); + drm_atomic_helper_wait_for_vblanks(dev, state); drm_atomic_helper_cleanup_planes(dev, state); } diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c index 86829f5..af9ddbe 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c @@ -122,7 +122,6 @@ struct vop { struct mutex vsync_mutex; bool vsync_work_pending; struct completion dsp_hold_completion; - struct completion wait_update_complete; /* protected by dev->event_lock */ struct drm_pending_vblank_event *event; @@ -937,18 +936,9 @@ static void vop_crtc_disable_vblank(struct drm_crtc *crtc) spin_unlock_irqrestore(&vop->irq_lock, flags); } -static void vop_crtc_wait_for_update(struct drm_crtc *crtc) -{ - struct vop *vop = to_vop(crtc); - - reinit_completion(&vop->wait_update_complete); - WARN_ON(!wait_for_completion_timeout(&vop->wait_update_complete, 100)); -} - static const struct rockchip_crtc_funcs private_crtc_funcs = { .enable_vblank = vop_crtc_enable_vblank, .disable_vblank = vop_crtc_disable_vblank, - .wait_for_update = vop_crtc_wait_for_update, }; static bool vop_crtc_mode_fixup(struct drm_crtc *crtc, @@ -1255,9 +1245,6 @@ static void vop_handle_vblank(struct vop *vop) } spin_unlock_irqrestore(&drm->event_lock, flags); - if (!completion_done(&vop->wait_update_complete)) - complete(&vop->wait_update_complete); - if (test_and_clear_bit(VOP_PENDING_FB_UNREF, &vop->pending)) drm_flip_work_commit(&vop->fb_unref_work, system_unbound_wq); } @@ -1402,7 +1389,6 @@ static int vop_create_crtc(struct vop *vop) vop_fb_unref_worker); init_completion(&vop->dsp_hold_completion); - init_completion(&vop->wait_update_complete); init_completion(&vop->line_flag_completion); crtc->port = port; rockchip_register_crtc_funcs(crtc, &private_crtc_funcs);