From patchwork Thu Dec 17 06:25:39 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 7869721 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Original-To: patchwork-linux-sh@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 5B223BEEE5 for ; Thu, 17 Dec 2015 06:25:48 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 559B3203F3 for ; Thu, 17 Dec 2015 06:25:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 86EC9203F1 for ; Thu, 17 Dec 2015 06:25:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932788AbbLQGZq (ORCPT ); Thu, 17 Dec 2015 01:25:46 -0500 Received: from galahad.ideasonboard.com ([185.26.127.97]:44396 "EHLO galahad.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932171AbbLQGZp (ORCPT ); Thu, 17 Dec 2015 01:25:45 -0500 Received: from avalon.ideasonboard.com (unknown [207.140.26.138]) by galahad.ideasonboard.com (Postfix) with ESMTPSA id 4575E20035; Thu, 17 Dec 2015 07:25:42 +0100 (CET) From: Laurent Pinchart To: dri-devel@lists.freedesktop.org Cc: linux-sh@vger.kernel.org Subject: [PATCH] drm: rcar-du: Add probe deferral debug messages Date: Thu, 17 Dec 2015 08:25:39 +0200 Message-Id: <1450333539-32178-1-git-send-email-laurent.pinchart+renesas@ideasonboard.com> X-Mailer: git-send-email 2.4.10 Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham 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 Print a message when the HDMI I2C slave encoder can't be found to help debugging probe deferral issues. Signed-off-by: Laurent Pinchart --- drivers/gpu/drm/rcar-du/rcar_du_hdmienc.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/rcar-du/rcar_du_hdmienc.c b/drivers/gpu/drm/rcar-du/rcar_du_hdmienc.c index 00fea7e6b378..cb892eefc723 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_hdmienc.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_hdmienc.c @@ -131,12 +131,19 @@ int rcar_du_hdmienc_init(struct rcar_du_device *rcdu, /* Locate the slave I2C device and driver. */ i2c_slave = of_find_i2c_device_by_node(np); - if (!i2c_slave || !i2c_get_clientdata(i2c_slave)) + if (!i2c_slave || !i2c_get_clientdata(i2c_slave)) { + dev_dbg(rcdu->dev, + "can't get I2C slave for %s, deferring probe\n", + of_node_full_name(np)); return -EPROBE_DEFER; + } hdmienc->dev = &i2c_slave->dev; if (hdmienc->dev->driver == NULL) { + dev_dbg(rcdu->dev, + "I2C slave %s not probed yet, deferring probe\n", + dev_name(hdmienc->dev)); ret = -EPROBE_DEFER; goto error; }