From patchwork Tue Mar 28 06:14:57 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Neuling X-Patchwork-Id: 744089 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [103.22.144.68]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3vsgc10xyGz9s7N for ; Tue, 28 Mar 2017 17:15:13 +1100 (AEDT) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 3vsgc06DH2zDqZf for ; Tue, 28 Mar 2017 17:15:12 +1100 (AEDT) X-Original-To: skiboot@lists.ozlabs.org Delivered-To: skiboot@lists.ozlabs.org Received: from ozlabs.org (ozlabs.org [IPv6:2401:3900:2:1::2]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3vsgbs2rVwzDqZR for ; Tue, 28 Mar 2017 17:15:05 +1100 (AEDT) Received: from localhost.localdomain (localhost [127.0.0.1]) by ozlabs.org (Postfix) with ESMTP id 3vsgbs1LKXz9s7K; Tue, 28 Mar 2017 17:15:05 +1100 (AEDT) Received: by localhost.localdomain (Postfix, from userid 1000) id B1B31EEEE85; Tue, 28 Mar 2017 17:15:04 +1100 (AEDT) From: Michael Neuling To: stewart@linux.vnet.ibm.com Date: Tue, 28 Mar 2017 17:14:57 +1100 Message-Id: <20170328061457.25104-2-mikey@neuling.org> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20170328061457.25104-1-mikey@neuling.org> References: <20170328061457.25104-1-mikey@neuling.org> Subject: [Skiboot] [PATCH 2/2] phb4: Default to PCIe GEN2 on DD1 X-BeenThere: skiboot@lists.ozlabs.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Mailing list for skiboot development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: skiboot@lists.ozlabs.org, mikey@neuling.org MIME-Version: 1.0 Errors-To: skiboot-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Skiboot" Default to PCIe GEN2 link speeds on DD1 for stability. Can be overridden using nvram pcie-max-link-speed=4 parameter. Signed-off-by: Michael Neuling --- hw/phb4.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/hw/phb4.c b/hw/phb4.c index 694a475aa7..27213c43fa 100644 --- a/hw/phb4.c +++ b/hw/phb4.c @@ -3168,8 +3168,10 @@ static void phb4_create(struct dt_node *np) if (!phb4_read_capabilities(p)) goto failed; - /* Priority order: NVRAM -> dt -> GEN4 */ + /* Priority order: NVRAM -> dt -> GEN2 dd1 -> GEN4 */ p->max_link_speed = 4; + if (p->rev == PHB4_REV_NIMBUS_DD10) + p->max_link_speed = 2; if (dt_has_node_property(np, "ibm,max-link-speed", NULL)) p->max_link_speed = dt_prop_get_u32(np, "ibm,max-link-speed"); if (pcie_max_link_speed)