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 3DBB44C6A for ; Mon, 14 Nov 2022 12:53:28 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 92E0DC433D7; Mon, 14 Nov 2022 12:53:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1668430408; bh=RKvN1kyaBatJ+467RcUCZfzWCDYAj7wqRw0ImaeHN5Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pEMcuXv0xWN0a3uyeS0umB2XbSJr6sd6/ua7P+M49lDNRF4vQQ1NLXUCZrpsQP+1o 1MPwK57XMx8fB2FOegj/vKboL0k7fR0NylNlKxgGLe9DcEEJS+5efc9of3LaOC4pz+ xQrbJSj3fg9C5dlLXwo5SnHc9swfUvmy0FDh62bw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Sanjay R Mehta , Basavaraj Natikar , Renjith Pananchikkal , Mika Westerberg , "Limonciello, Mario" Subject: [PATCH 5.15 002/131] thunderbolt: Add DP OUT resource when DP tunnel is discovered Date: Mon, 14 Nov 2022 13:44:31 +0100 Message-Id: <20221114124448.848423682@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221114124448.729235104@linuxfoundation.org> References: <20221114124448.729235104@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: Sanjay R Mehta commit b60e31bf18a7064032dbcb73dcb5b58f8a00a110 upstream. If the boot firmware implements a connection manager of its own it may create a DisplayPort tunnel and will be handed off to Linux connection manager, but the DP OUT resource is not saved in the dp_resource list. This patch adds tunnelled DP OUT port to the dp_resource list once the DP tunnel is discovered. Signed-off-by: Sanjay R Mehta Signed-off-by: Basavaraj Natikar Tested-by: Renjith Pananchikkal Signed-off-by: Mika Westerberg Cc: "Limonciello, Mario" Signed-off-by: Greg Kroah-Hartman --- drivers/thunderbolt/tb.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) --- a/drivers/thunderbolt/tb.c +++ b/drivers/thunderbolt/tb.c @@ -105,6 +105,32 @@ static void tb_remove_dp_resources(struc } } +static void tb_discover_dp_resource(struct tb *tb, struct tb_port *port) +{ + struct tb_cm *tcm = tb_priv(tb); + struct tb_port *p; + + list_for_each_entry(p, &tcm->dp_resources, list) { + if (p == port) + return; + } + + tb_port_dbg(port, "DP %s resource available discovered\n", + tb_port_is_dpin(port) ? "IN" : "OUT"); + list_add_tail(&port->list, &tcm->dp_resources); +} + +static void tb_discover_dp_resources(struct tb *tb) +{ + struct tb_cm *tcm = tb_priv(tb); + struct tb_tunnel *tunnel; + + list_for_each_entry(tunnel, &tcm->tunnel_list, list) { + if (tb_tunnel_is_dp(tunnel)) + tb_discover_dp_resource(tb, tunnel->dst_port); + } +} + static void tb_switch_discover_tunnels(struct tb_switch *sw, struct list_head *list, bool alloc_hopids) @@ -1396,6 +1422,8 @@ static int tb_start(struct tb *tb) tb_scan_switch(tb->root_switch); /* Find out tunnels created by the boot firmware */ tb_discover_tunnels(tb); + /* Add DP resources from the DP tunnels created by the boot firmware */ + tb_discover_dp_resources(tb); /* * If the boot firmware did not create USB 3.x tunnels create them * now for the whole topology.