From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 61F24C4361B for ; Tue, 15 Dec 2020 08:25:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 04E302228A for ; Tue, 15 Dec 2020 08:25:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726873AbgLOIY4 (ORCPT ); Tue, 15 Dec 2020 03:24:56 -0500 Received: from honk.sigxcpu.org ([24.134.29.49]:57368 "EHLO honk.sigxcpu.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726176AbgLOIYa (ORCPT ); Tue, 15 Dec 2020 03:24:30 -0500 Received: from localhost (localhost [127.0.0.1]) by honk.sigxcpu.org (Postfix) with ESMTP id 6B601FB02; Tue, 15 Dec 2020 09:23:41 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at honk.sigxcpu.org Received: from honk.sigxcpu.org ([127.0.0.1]) by localhost (honk.sigxcpu.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id NTYryB4XnR6q; Tue, 15 Dec 2020 09:23:39 +0100 (CET) Received: by bogon.sigxcpu.org (Postfix, from userid 1000) id A05ED40261; Tue, 15 Dec 2020 09:23:38 +0100 (CET) From: =?UTF-8?q?Guido=20G=C3=BCnther?= To: Marek Vasut , Stefan Agner , David Airlie , Daniel Vetter , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , Emil Velikov , Laurent Pinchart , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v1 1/1] drm: mxsfb: Silence -EPROBE_DEFER while waiting for bridge Date: Tue, 15 Dec 2020 09:23:38 +0100 Message-Id: X-Mailer: git-send-email 2.29.2 In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org It can take multiple iterations until all components for an attached DSI bridge are up leading to several: [ 3.796425] mxsfb 30320000.lcd-controller: Cannot connect bridge: -517 [ 3.816952] mxsfb 30320000.lcd-controller: [drm:mxsfb_probe [mxsfb]] *ERROR* failed to attach bridge: -517 Silence this by checking for -EPROBE_DEFER and using dev_err_probe() so we set a deferred reason in case a dependency fails to probe (which quickly happens on small config/DT changes due to the rather long probe chain which can include bridges, phys, panels, backights, leds, etc.). This also removes the only DRM_DEV_ERROR() usage, the rest of the driver uses dev_err(). Signed-off-by: Guido Günther Fixes: c42001e357f7 ("drm: mxsfb: Use drm_panel_bridge") --- drivers/gpu/drm/mxsfb/mxsfb_drv.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.c b/drivers/gpu/drm/mxsfb/mxsfb_drv.c index 6faf17b6408d..6da93551e2e5 100644 --- a/drivers/gpu/drm/mxsfb/mxsfb_drv.c +++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.c @@ -134,11 +134,8 @@ static int mxsfb_attach_bridge(struct mxsfb_drm_private *mxsfb) return -ENODEV; ret = drm_bridge_attach(&mxsfb->encoder, bridge, NULL, 0); - if (ret) { - DRM_DEV_ERROR(drm->dev, - "failed to attach bridge: %d\n", ret); - return ret; - } + if (ret) + return dev_err_probe(drm->dev, ret, "Failed to attach bridge\n"); mxsfb->bridge = bridge; @@ -212,7 +209,8 @@ static int mxsfb_load(struct drm_device *drm, ret = mxsfb_attach_bridge(mxsfb); if (ret) { - dev_err(drm->dev, "Cannot connect bridge: %d\n", ret); + if (ret != -EPROBE_DEFER) + dev_err(drm->dev, "Cannot connect bridge: %d\n", ret); goto err_vblank; } -- 2.29.2