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 17280CDB465 for ; Mon, 16 Oct 2023 14:57:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233829AbjJPO5m (ORCPT ); Mon, 16 Oct 2023 10:57:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58410 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233816AbjJPO5m (ORCPT ); Mon, 16 Oct 2023 10:57:42 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 07C58AB for ; Mon, 16 Oct 2023 07:57:41 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4AEBFC433C7; Mon, 16 Oct 2023 14:57:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1697468260; bh=FpMDcxKsQIlHoILYM2FlPvmw5kCvnf2hEiSiqFJehnA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gUn+jweut2lzmGYSKjylsQ/KzpUx1tmGvEgTh/Duo+V4YE0y8Vpvh1sdL5OPzlvm3 J+wy/NcJxVKUKrT/z3DzydOQuOvVpBMG0kfU7hfzgYoFRxUDWmKM1257xZNU5o8EDB znDYoDZ3K3sfZ0S3ZK3Eojyt+R2hJ4nW33jinr3Q= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, RD Babiera , Heikki Krogerus Subject: [PATCH 6.5 174/191] usb: typec: altmodes/displayport: Signal hpd low when exiting mode Date: Mon, 16 Oct 2023 10:42:39 +0200 Message-ID: <20231016084019.436205798@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231016084015.400031271@linuxfoundation.org> References: <20231016084015.400031271@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 6.5-stable review patch. If anyone has any objections, please let me know. ------------------ From: RD Babiera commit 89434b069e460967624903b049e5cf5c9e6b99b9 upstream. Upon receiving an ACK for a sent EXIT_MODE message, the DisplayPort driver currently resets the status and configuration of the port partner. The hpd signal is not updated despite being part of the status, so the Display stack can still transmit video despite typec_altmode_exit placing the lanes in a Safe State. Set hpd to low when a sent EXIT_MODE message is ACK'ed. Fixes: 0e3bb7d6894d ("usb: typec: Add driver for DisplayPort alternate mode") Cc: stable@vger.kernel.org Signed-off-by: RD Babiera Acked-by: Heikki Krogerus Link: https://lore.kernel.org/r/20231009210057.3773877-2-rdbabiera@google.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/altmodes/displayport.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/usb/typec/altmodes/displayport.c +++ b/drivers/usb/typec/altmodes/displayport.c @@ -304,6 +304,11 @@ static int dp_altmode_vdm(struct typec_a typec_altmode_update_active(alt, false); dp->data.status = 0; dp->data.conf = 0; + if (dp->hpd) { + drm_connector_oob_hotplug_event(dp->connector_fwnode); + dp->hpd = false; + sysfs_notify(&dp->alt->dev.kobj, "displayport", "hpd"); + } break; case DP_CMD_STATUS_UPDATE: dp->data.status = *vdo;