From patchwork Fri Nov 7 11:34:28 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Yan X-Patchwork-Id: 5251501 Return-Path: X-Original-To: patchwork-linux-rockchip@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 1ACF0C11AC for ; Fri, 7 Nov 2014 11:35:12 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5C7332012E for ; Fri, 7 Nov 2014 11:35:11 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6F4DA200DB for ; Fri, 7 Nov 2014 11:35:10 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Xmhos-0004bf-3R; Fri, 07 Nov 2014 11:35:10 +0000 Received: from va-smtp01.263.net ([54.88.144.211]) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Xmhoq-0003SU-DV for linux-rockchip@lists.infradead.org; Fri, 07 Nov 2014 11:35:08 +0000 Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by va-smtp01.263.net (Postfix) with ESMTP id D0C3D7F90C; Fri, 7 Nov 2014 19:34:34 +0800 (CST) X-RL-SENDER: andy.yan@rock-chips.com X-FST-TO: airlied@linux.ie X-SENDER-IP: 127.0.0.1 X-LOGIN-NAME: andy.yan@rock-chips.com X-UNIQUE-TAG: X-SENDER: yxj@rock-chips.com X-DNS-TYPE: 1 Received: from localhost.localdomain (localhost [127.0.0.1]) by va-smtp01.263.net (Postfix) whith ESMTP id 5211XL3R36; Fri, 07 Nov 2014 19:34:34 +0800 (CST) From: Andy Yan To: airlied@linux.ie, heiko@sntech.de, fabio.estevam@freescale.com, rmk+kernel@arm.linux.org.uk Subject: [PATCH V4 4/6] dw-hdmi: return defer if can't get ddc i2c adapter Date: Fri, 7 Nov 2014 19:34:28 +0800 Message-Id: <1415360068-8606-1-git-send-email-andy.yan@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1415360016-8559-1-git-send-email-andy.yan@rock-chips.com> References: <1415360016-8559-1-git-send-email-andy.yan@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20141107_033508_614606_2D3927AE X-CRM114-Status: UNSURE ( 7.40 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.0 (/) Cc: devel@driverdev.osuosl.org, devicetree@vger.kernel.org, Zubair.Kakakhel@imgtec.com, Arnd Bergmann , Josh Boyer , Greg Kroah-Hartman , ykk@rock-chips.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Inki Dae , linux-rockchip@lists.infradead.org, Rob Herring , Sean Paul , djkurtz@google.com, Philipp Zabel , Dave Airlie , Grant Likely , Andy yan , Shawn Guo , jay.xu@rock-chips.com, Lucas Stach X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP drm driver may probe before the i2c bus, so the driver should defer probing untill it is avaliable Signed-off-by: Andy Yan --- drivers/gpu/drm/bridge/dw_hdmi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c index 693a379..df76a8c 100644 --- a/drivers/gpu/drm/bridge/dw_hdmi.c +++ b/drivers/gpu/drm/bridge/dw_hdmi.c @@ -1503,8 +1503,11 @@ static int dw_hdmi_bind(struct device *dev, struct device *master, void *data) ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0); if (ddc_node) { hdmi->ddc = of_find_i2c_adapter_by_node(ddc_node); - if (!hdmi->ddc) + if (!hdmi->ddc) { dev_dbg(hdmi->dev, "failed to read ddc node\n"); + of_node_put(ddc_node); + return -EPROBE_DEFER; + } of_node_put(ddc_node); } else {