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 39E9FC00528 for ; Fri, 21 Jul 2023 19:22:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232153AbjGUTWR (ORCPT ); Fri, 21 Jul 2023 15:22:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43872 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232157AbjGUTWP (ORCPT ); Fri, 21 Jul 2023 15:22:15 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B7FA2ED for ; Fri, 21 Jul 2023 12:22:13 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 4C1D061D5F for ; Fri, 21 Jul 2023 19:22:13 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5F403C433C7; Fri, 21 Jul 2023 19:22:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689967332; bh=YAsICtfXFfPotbgmsYNMsV3bJgh3ZWlp+EjzFQI6H54=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=y4GdkVrmp61IwoawxKedEWnIXo5lHTqbMcyoKHaihaqYdeFe+DdRUUc0+vOV2D4en +5cBUMx+iAQvi2kgemFLk1uAne91fsUh0oc0nCgQ6Rg9l0XBiSmomngn/LPjuXolxo Jnd7+etroxMmZKZdFxTnjPFwrrktNC15ZowmDeY8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Damien Le Moal , Rick Wertenbroek , Lorenzo Pieralisi Subject: [PATCH 6.1 126/223] PCI: rockchip: Assert PCI Configuration Enable bit after probe Date: Fri, 21 Jul 2023 18:06:19 +0200 Message-ID: <20230721160526.250404901@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230721160520.865493356@linuxfoundation.org> References: <20230721160520.865493356@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Rick Wertenbroek commit f397fd4ac1fa3afcabd8cee030f953ccaed2a364 upstream. Assert PCI Configuration Enable bit after probe. When this bit is left to 0 in the endpoint mode, the RK3399 PCIe endpoint core will generate configuration request retry status (CRS) messages back to the root complex. Assert this bit after probe to allow the RK3399 PCIe endpoint core to reply to configuration requests from the root complex. This is documented in section 17.5.8.1.2 of the RK3399 TRM. Link: https://lore.kernel.org/r/20230418074700.1083505-4-rick.wertenbroek@gmail.com Fixes: cf590b078391 ("PCI: rockchip: Add EP driver for Rockchip PCIe controller") Tested-by: Damien Le Moal Signed-off-by: Rick Wertenbroek Signed-off-by: Lorenzo Pieralisi Reviewed-by: Damien Le Moal Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/pci/controller/pcie-rockchip-ep.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/pci/controller/pcie-rockchip-ep.c +++ b/drivers/pci/controller/pcie-rockchip-ep.c @@ -631,6 +631,9 @@ static int rockchip_pcie_ep_probe(struct ep->irq_pci_addr = ROCKCHIP_PCIE_EP_DUMMY_IRQ_ADDR; + rockchip_pcie_write(rockchip, PCIE_CLIENT_CONF_ENABLE, + PCIE_CLIENT_CONFIG); + return 0; err_epc_mem_exit: pci_epc_mem_exit(epc);