From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1ACD9538F for ; Mon, 19 Jun 2023 10:37:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 93A5FC433C0; Mon, 19 Jun 2023 10:37:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1687171046; bh=C238M2BYjUpct3HZg/QcivshdYs/b3I14x62f1EVfdo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VSRWNswxn3GRuuEjlC4qj/nHlAcOXhNuCgyHwEYmrjfZvY6FX+bzJNcWWDatcdAxi G1PiDGWemL5XlyNrbRyiyrXfJydjVWp2leQLejInnN299JE76xOR81YlMAqj3UgIty upbtxwu5tFs8R7FZcS8Sbl2CpLUnmb3zU1Gge6Sw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Koba Ko , Yehezkel Bernat , Mika Westerberg Subject: [PATCH 6.3 092/187] thunderbolt: Increase DisplayPort Connection Manager handshake timeout Date: Mon, 19 Jun 2023 12:28:30 +0200 Message-ID: <20230619102202.049211731@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230619102157.579823843@linuxfoundation.org> References: <20230619102157.579823843@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Mika Westerberg commit b6d572aeb58a5e0be86bd51ea514c4feba996cc4 upstream. It turns out that when plugging in VGA cable through USB-C to VGA/DVI dongle the Connection Manager handshake can take longer time, at least on Intel Titan Ridge based docks such as Dell WD91TB. This leads to following error in the dmesg: thunderbolt 0000:00:0d.3: 3:10: DP tunnel activation failed, aborting and the display stays blank (because we failed to establish the tunnel). For this reason increase the timeout to 3s. Reported-by: Koba Ko Cc: stable@vger.kernel.org Acked-By: Yehezkel Bernat Signed-off-by: Mika Westerberg Signed-off-by: Greg Kroah-Hartman --- drivers/thunderbolt/tunnel.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/thunderbolt/tunnel.c +++ b/drivers/thunderbolt/tunnel.c @@ -526,7 +526,7 @@ static int tb_dp_xchg_caps(struct tb_tun * Perform connection manager handshake between IN and OUT ports * before capabilities exchange can take place. */ - ret = tb_dp_cm_handshake(in, out, 1500); + ret = tb_dp_cm_handshake(in, out, 3000); if (ret) return ret;