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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 15614C2D0CE for ; Sun, 29 Dec 2019 17:44:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E126E207FD for ; Sun, 29 Dec 2019 17:44:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1577641447; bh=tIVi2pHfOezUp/y8Sz3RUPHHlYUhRouaMh1e4UmHkB8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=TER19q+6H1n45rV6H+IRlui/8idksVhmgc59GhqeJzABkFG2Dxk+AquwY+AUxri4O rya4+78Gi7nVKFFUIGLn4AWi1fyfvWP2gHruYsOTDrDe8KRRIshXHoTpUcmTmCXa8v Bq85VVP38knrMR4sjml+bSc6HingfkvLYlaDm5n8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730620AbfL2RoF (ORCPT ); Sun, 29 Dec 2019 12:44:05 -0500 Received: from mail.kernel.org ([198.145.29.99]:51906 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730597AbfL2RoD (ORCPT ); Sun, 29 Dec 2019 12:44:03 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 22F3320718; Sun, 29 Dec 2019 17:44:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1577641442; bh=tIVi2pHfOezUp/y8Sz3RUPHHlYUhRouaMh1e4UmHkB8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=F7Oez4FvdOazaH9C2zKRzHNrnbTP5ZP/ixbrfYGm20ukHukrLiSyDK0bfHfV2m+tO xB1w1dR6ugFxyUKxt4EZyxPlvgLdgybBNdkU5sj0ORpSGNtBSmEviCl1t5840mKQSZ Vm1NVym6ZJfGdlq+mWvN2kzCFtL4XtS45k867Py0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Martin Tsai , Charlene Liu , Leo Li , Alex Deucher , Sasha Levin Subject: [PATCH 5.4 060/434] drm/amd/display: Handle virtual signal type in disable_link() Date: Sun, 29 Dec 2019 18:21:53 +0100 Message-Id: <20191229172705.811086209@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191229172702.393141737@linuxfoundation.org> References: <20191229172702.393141737@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Martin Tsai [ Upstream commit 616f5b65f1c02d3d6ae370644670d14c57de2fd8 ] [Why] The new implementation changed the behavior to allow process setMode to DAL when DAL returns empty mode query for unplugged display. This will trigger additional disable_link(). When unplug HDMI from MST dock, driver will update stream->signal to "Virtual". disable_link() will call disable_output() if the signal type is not DP and induce other displays on MST dock show black screen. [How] Don't need to process disable_output() if the signal type is virtual. Signed-off-by: Martin Tsai Reviewed-by: Charlene Liu Acked-by: Leo Li Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/dc/core/dc_link.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c index ca20b150afcc..de1b61595ffb 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -2169,8 +2169,10 @@ static void disable_link(struct dc_link *link, enum signal_type signal) dp_set_fec_ready(link, false); } #endif - } else - link->link_enc->funcs->disable_output(link->link_enc, signal); + } else { + if (signal != SIGNAL_TYPE_VIRTUAL) + link->link_enc->funcs->disable_output(link->link_enc, signal); + } if (signal == SIGNAL_TYPE_DISPLAY_PORT_MST) { /* MST disable link only when no stream use the link */ -- 2.20.1