From patchwork Fri Mar 9 22:22:55 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Enric Balletbo i Serra X-Patchwork-Id: 10272107 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 CEE87605D2 for ; Fri, 9 Mar 2018 22:24:10 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B14412A017 for ; Fri, 9 Mar 2018 22:24:10 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A56902A023; Fri, 9 Mar 2018 22:24:10 +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=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 3632F2A017 for ; Fri, 9 Mar 2018 22:24:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=8dwyzLlD+Rq9y8Mf+EfvlQ/1lzk8dkWHen2GiW8m9fE=; b=A5TD/flBBO/XR5ufoaVPKmtfe/ uf455i2REFXY3PEX5W9D3H65Eo7oxRgO5ud3+GshFnSnCEhF7PZN8u/K+0BIJFv5X0voDKhZzebqf 4OeAKX7+/JTEqaXr8bT8sxyzr5t6Zla/LnnTmKe9VqMfTyXkOy28M8gs0J78AYdbjldpiQeRbu8HH HVG8gigPJsHdV8cguY5FIbkhf6zbSVsLuMf1X/NRPkDi3Z7hWa6d0K64W1wmiiu0yIytLkX3EE7oR RKumsVVFYC6YmoyxtQ+Vz2iDv651TzTSAkXGQRnMtgdTEVnvSLhRvUSdYkZN481twMzXzdGWriflO 5QLOiW4Q==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.89 #1 (Red Hat Linux)) id 1euQQl-00044S-W9; Fri, 09 Mar 2018 22:24:04 +0000 Received: from bhuna.collabora.co.uk ([46.235.227.227]) by bombadil.infradead.org with esmtps (Exim 4.89 #1 (Red Hat Linux)) id 1euQQh-000420-8Z; Fri, 09 Mar 2018 22:24:01 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: eballetbo) with ESMTPSA id C8B022761CB From: Enric Balletbo i Serra To: architt@codeaurora.org, inki.dae@samsung.com, thierry.reding@gmail.com, hjc@rock-chips.com, seanpaul@chromium.org, airlied@linux.ie, tfiga@chromium.org, heiko@sntech.de Subject: [PATCH v5 04/36] drm/rockchip: add mutex vop lock Date: Fri, 9 Mar 2018 23:22:55 +0100 Message-Id: <20180309222327.18689-5-enric.balletbo@collabora.com> X-Mailer: git-send-email 2.16.1 In-Reply-To: <20180309222327.18689-1-enric.balletbo@collabora.com> References: <20180309222327.18689-1-enric.balletbo@collabora.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180309_142359_591162_51C824A9 X-CRM114-Status: GOOD ( 11.85 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, a.hajda@samsung.com, Laurent.pinchart@ideasonboard.com, ykk@rock-chips.com, kernel@collabora.com, m.szyprowski@samsung.com, linux-samsung-soc@vger.kernel.org, jy0922.shim@samsung.com, rydberg@bitmath.org, krzk@kernel.org, linux-rockchip@lists.infradead.org, kgene@kernel.org, linux-input@vger.kernel.org, orjan.eide@arm.com, wxt@rock-chips.com, jeffy.chen@rock-chips.com, linux-arm-kernel@lists.infradead.org, mark.yao@rock-chips.com, wzz@rock-chips.com, hl@rock-chips.com, jingoohan1@gmail.com, sw0312.kim@samsung.com, dianders@chromium.org, kyungmin.park@samsung.com, Enric Balletbo i Serra , kuankuan.y@gmail.com, hshi@chromium.org 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 From: zain wang Add a lock to vop to avoid disabling the crtc while waiting for a line flag while enabling psr. If we disable in the middle of waiting for the line flag, we'll end up timing out or worse. Signed-off-by: zain wang Signed-off-by: Sean Paul Signed-off-by: Thierry Escande Signed-off-by: Enric Balletbo i Serra Tested-by: Marek Szyprowski Reviewed-by: Heiko Stuebner --- drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 30 +++++++++++++++++++++++------ 1 file changed, 24 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c index 158e79e5062e..b601c59e76a8 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c @@ -117,6 +117,8 @@ struct vop { spinlock_t reg_lock; /* lock vop irq reg */ spinlock_t irq_lock; + /* protects crtc enable/disable */ + struct mutex vop_lock; unsigned int irq; @@ -569,6 +571,7 @@ static void vop_crtc_atomic_disable(struct drm_crtc *crtc, WARN_ON(vop->event); + mutex_lock(&vop->vop_lock); drm_crtc_vblank_off(crtc); /* @@ -604,6 +607,7 @@ static void vop_crtc_atomic_disable(struct drm_crtc *crtc, clk_disable(vop->aclk); clk_disable(vop->hclk); pm_runtime_put(vop->dev); + mutex_unlock(&vop->vop_lock); if (crtc->state->event && !crtc->state->active) { spin_lock_irq(&crtc->dev->event_lock); @@ -868,10 +872,13 @@ static void vop_crtc_atomic_enable(struct drm_crtc *crtc, uint32_t pin_pol, val; int ret; + mutex_lock(&vop->vop_lock); + WARN_ON(vop->event); ret = vop_enable(crtc); if (ret) { + mutex_unlock(&vop->vop_lock); DRM_DEV_ERROR(vop->dev, "Failed to enable vop (%d)\n", ret); return; } @@ -935,6 +942,7 @@ static void vop_crtc_atomic_enable(struct drm_crtc *crtc, clk_set_rate(vop->dclk, adjusted_mode->clock * 1000); VOP_REG_SET(vop, common, standby, 0); + mutex_unlock(&vop->vop_lock); } static bool vop_fs_irq_is_pending(struct vop *vop) @@ -1473,15 +1481,21 @@ int rockchip_drm_wait_vact_end(struct drm_crtc *crtc, unsigned int mstimeout) { struct vop *vop = to_vop(crtc); unsigned long jiffies_left; + int ret = 0; if (!crtc || !vop->is_enabled) return -ENODEV; - if (mstimeout <= 0) - return -EINVAL; + mutex_lock(&vop->vop_lock); + if (mstimeout <= 0) { + ret = -EINVAL; + goto out; + } - if (vop_line_flag_irq_is_enabled(vop)) - return -EBUSY; + if (vop_line_flag_irq_is_enabled(vop)) { + ret = -EBUSY; + goto out; + } reinit_completion(&vop->line_flag_completion); vop_line_flag_irq_enable(vop); @@ -1492,10 +1506,13 @@ int rockchip_drm_wait_vact_end(struct drm_crtc *crtc, unsigned int mstimeout) if (jiffies_left == 0) { DRM_DEV_ERROR(vop->dev, "Timeout waiting for IRQ\n"); - return -ETIMEDOUT; + ret = -ETIMEDOUT; + goto out; } - return 0; +out: + mutex_unlock(&vop->vop_lock); + return ret; } EXPORT_SYMBOL(rockchip_drm_wait_vact_end); @@ -1545,6 +1562,7 @@ static int vop_bind(struct device *dev, struct device *master, void *data) spin_lock_init(&vop->reg_lock); spin_lock_init(&vop->irq_lock); + mutex_init(&vop->vop_lock); ret = devm_request_irq(dev, vop->irq, vop_isr, IRQF_SHARED, dev_name(dev), vop);