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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CA3CEC5AE5B for ; Wed, 15 Nov 2023 20:57:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344625AbjKOU5x (ORCPT ); Wed, 15 Nov 2023 15:57:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36596 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344630AbjKOU5a (ORCPT ); Wed, 15 Nov 2023 15:57:30 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ACB7E170F for ; Wed, 15 Nov 2023 12:57:25 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DF0C3C32783; Wed, 15 Nov 2023 20:48:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1700081339; bh=Oj5ZFj2NRptLf3opMR21CHIN2vepB91CeO3sqLgW0As=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aZ0EYdtoRdFW6tmJCwIdDf4tT1SmAnZk1euhMybVMEPAsxK61y2VWljQQXzr+WdA1 YUe9fcYUEjzT1Qmc+rUBfNaiPh+7ZbANhH4wozZAnA031qCMAQinAEakEBDbNo/DFC uojwVSzwQ+9V4avpUOAyqrByWMViDCcAAJKydNjM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Tomi Valkeinen , Marcel Ziswiler , Robert Foss , Sasha Levin Subject: [PATCH 5.15 093/244] drm/bridge: lt8912b: Manually disable HPD only if it was enabled Date: Wed, 15 Nov 2023 15:34:45 -0500 Message-ID: <20231115203553.937447650@linuxfoundation.org> X-Mailer: git-send-email 2.42.1 In-Reply-To: <20231115203548.387164783@linuxfoundation.org> References: <20231115203548.387164783@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Tomi Valkeinen [ Upstream commit 6985c5efc4057bc79137807295d84ada3123d051 ] lt8912b only calls drm_bridge_hpd_enable() if it creates a connector and the next bridge has DRM_BRIDGE_OP_HPD set. However, when calling drm_bridge_hpd_disable() it misses checking if a connector was created, calling drm_bridge_hpd_disable() even if HPD was never enabled. I don't see any issues caused by this wrong call, though. Add the check to avoid wrongly calling drm_bridge_hpd_disable(). Fixes: 3b0a01a6a522 ("drm/bridge: lt8912b: Add hot plug detection") Signed-off-by: Tomi Valkeinen Tested-by: Marcel Ziswiler Reviewed-by: Robert Foss Signed-off-by: Robert Foss Link: https://patchwork.freedesktop.org/patch/msgid/20230804-lt8912b-v1-3-c542692c6a2f@ideasonboard.com Signed-off-by: Sasha Levin --- drivers/gpu/drm/bridge/lontium-lt8912b.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c b/drivers/gpu/drm/bridge/lontium-lt8912b.c index b1e5acca171be..73b6fcae6dca8 100644 --- a/drivers/gpu/drm/bridge/lontium-lt8912b.c +++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c @@ -577,7 +577,7 @@ static void lt8912_bridge_detach(struct drm_bridge *bridge) lt8912_hard_power_off(lt); - if (lt->hdmi_port->ops & DRM_BRIDGE_OP_HPD) + if (lt->connector.dev && lt->hdmi_port->ops & DRM_BRIDGE_OP_HPD) drm_bridge_hpd_disable(lt->hdmi_port); } -- 2.42.0