From patchwork Mon May 31 13:14:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 451096 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 A7B39C47083 for ; Mon, 31 May 2021 14:04:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8B10C61396 for ; Mon, 31 May 2021 14:04:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232516AbhEaOGE (ORCPT ); Mon, 31 May 2021 10:06:04 -0400 Received: from mail.kernel.org ([198.145.29.99]:37386 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232212AbhEaOD5 (ORCPT ); Mon, 31 May 2021 10:03:57 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id F20C1613C1; Mon, 31 May 2021 13:37:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1622468274; bh=p9SOPVhR3hgFauLpHcLifRt5AajZWHwWV4bCa9HFucs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HhMYZqp0ejVYr5db15BRPuyaz193KjOWDLyHW8gywVzmP0m7m5vrNcZ3SHRxQyUHv EW847IXMLbLItsgVMPNCIp2uAK5SGxj+tRA+DcEbb70miCPst3GpxYuJQyogZjTCbU Llz1s1J0Lc1V86zo1DBdKU/nFcblrUFV0WnuQAic= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Chris Park , Nicholas Kazlauskas , Stylon Wang , Daniel Wheeler , Alex Deucher , Sasha Levin Subject: [PATCH 5.10 181/252] drm/amd/display: Disconnect non-DP with no EDID Date: Mon, 31 May 2021 15:14:06 +0200 Message-Id: <20210531130704.161056012@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210531130657.971257589@linuxfoundation.org> References: <20210531130657.971257589@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Chris Park [ Upstream commit 080039273b126eeb0185a61c045893a25dbc046e ] [Why] Active DP dongles return no EDID when dongle is connected, but VGA display is taken out. Current driver behavior does not remove the active display when this happens, and this is a gap between dongle DTP and dongle behavior. [How] For active DP dongles and non-DP scenario, disconnect sink on detection when no EDID is read due to timeout. Signed-off-by: Chris Park Reviewed-by: Nicholas Kazlauskas Acked-by: Stylon Wang Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/dc/core/dc_link.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) 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 f0039599e02f..62778ccea055 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -1049,6 +1049,24 @@ static bool dc_link_detect_helper(struct dc_link *link, dc_is_dvi_signal(link->connector_signal)) { if (prev_sink) dc_sink_release(prev_sink); + link_disconnect_sink(link); + + return false; + } + /* + * Abort detection for DP connectors if we have + * no EDID and connector is active converter + * as there are no display downstream + * + */ + if (dc_is_dp_sst_signal(link->connector_signal) && + (link->dpcd_caps.dongle_type == + DISPLAY_DONGLE_DP_VGA_CONVERTER || + link->dpcd_caps.dongle_type == + DISPLAY_DONGLE_DP_DVI_CONVERTER)) { + if (prev_sink) + dc_sink_release(prev_sink); + link_disconnect_sink(link); return false; }