From patchwork Fri Sep 14 17:00:58 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 10601099 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8A29614D6 for ; Fri, 14 Sep 2018 17:01:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 733B72BB85 for ; Fri, 14 Sep 2018 17:01:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 71AF12BBDD; Fri, 14 Sep 2018 17:01:12 +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=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED 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 473C92BB85 for ; Fri, 14 Sep 2018 17:01:04 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C57616E7B4; Fri, 14 Sep 2018 17:01:02 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by gabe.freedesktop.org (Postfix) with ESMTPS id 877766E7AF for ; Fri, 14 Sep 2018 17:01:00 +0000 (UTC) Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7] helo=dude.pengutronix.de.) by metis.ext.pengutronix.de with esmtp (Exim 4.89) (envelope-from ) id 1g0rSk-000068-RD; Fri, 14 Sep 2018 19:00:58 +0200 From: Lucas Stach To: Philipp Zabel Subject: [PATCH] drm/imx: ipuv3-plane: add IDMAC timeout warning Date: Fri, 14 Sep 2018 19:00:58 +0200 Message-Id: <20180914170058.10364-1-l.stach@pengutronix.de> X-Mailer: git-send-email 2.19.0 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: dri-devel@lists.freedesktop.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: kernel@pengutronix.de, dri-devel@lists.freedesktop.org, patchwork-lst@pengutronix.de Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Philipp Zabel ipu_plane_disable should never be called while the plane IDMAC channel is active. The busy wait is just a safety net that should never time out. Signed-off-by: Philipp Zabel Signed-off-by: Lucas Stach --- drivers/gpu/drm/imx/ipuv3-plane.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/imx/ipuv3-plane.c b/drivers/gpu/drm/imx/ipuv3-plane.c index c95a2fc51741..23fba068e964 100644 --- a/drivers/gpu/drm/imx/ipuv3-plane.c +++ b/drivers/gpu/drm/imx/ipuv3-plane.c @@ -236,9 +236,15 @@ static void ipu_plane_enable(struct ipu_plane *ipu_plane) void ipu_plane_disable(struct ipu_plane *ipu_plane, bool disable_dp_channel) { + int ret; + DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__); - ipu_idmac_wait_busy(ipu_plane->ipu_ch, 50); + ret = ipu_idmac_wait_busy(ipu_plane->ipu_ch, 50); + if (ret == -ETIMEDOUT) { + DRM_ERROR("[PLANE:%d] IDMAC timeout\n", + ipu_plane->base.base.id); + } if (ipu_plane->dp && disable_dp_channel) ipu_dp_disable_channel(ipu_plane->dp, false);