From patchwork Thu Apr 11 13:01:46 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Niklas Cassel X-Patchwork-Id: 13625927 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E6B39CD128A for ; Thu, 11 Apr 2024 13:02:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=qHGe4fkZC/31q9iX08H3z9kMNrfOgGq62X/Fa2RPBIA=; b=F22JDnv/FEJ8Lh 6DG0VAxW9oOaCSRaUHQ1wzb8Hp7vj6u2myUyukZYqDAB6D6Q3kfU/wwHK4pnI6pfYRMF6aO8GB0K1 LqPm+6767ivz6Tg6R0ZA2WH67qeijUwhtrcgvnl8NO2iht8oK0cvB2YbHZrlRN0igeE7Etxr/UD7S KC9J6NbG7Z/uNfVb3zB7m8w1Mxw+6b7cw13kdiqK6Q6xBMxkMROTJtDcJjVLGTqBVDjTYZoo+7R4m 1YFM9ZhATmsJGoh9VOAwNMEsoYsCcTqyx69E6C2+BDJEW0o9JCdY2J4VkHeccCpDbWsxFItYAzq9B /mJVu6urxDd0mmBlAn0w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1ruu45-0000000C3po-1dVO; Thu, 11 Apr 2024 13:02:05 +0000 Received: from sin.source.kernel.org ([2604:1380:40e1:4800::1]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1ruu40-0000000C3nW-2jlo; Thu, 11 Apr 2024 13:02:02 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id 75438CE2E76; Thu, 11 Apr 2024 13:01:58 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7454EC433C7; Thu, 11 Apr 2024 13:01:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1712840517; bh=NmTuJ01mkdJ4M9SVkg9GPWdStss5bWliTugsuTs2VlM=; h=From:To:Cc:Subject:Date:From; b=c/X/UEdh/jiwhdWH1yldKABp0w5pXUdODB2ZvPtWR9kT/vJ7l6NpKQlKp5q3Hmzqn ZAdmGl7R1F/OxjKxz8d3AXCkuBm0yt2JPPh+iNRkvM4En+76SfAYjzGAYmObzKMc2P tmeCBVKSLF3XSVKD7kc9UrZIQ190D57JhColEjyAINfnWSBdbUnEu7CREHzi7LtcW1 ye3wrZV//bk1quYBgXKNWtNrHMjP9v43vsrOPt442QxJ+cQDyFEoq5ZsfB5tScFcQB w+mUH56YSVTuKZ6yT2D+E9IDBDG2EWR1xiJLBbvTLZQ4v2KcyC3EJ4r0dbBLlEO+wh D2Nl+lq2Wnynw== From: Niklas Cassel To: Vinod Koul , Kishon Vijay Abraham I , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heiko Stuebner Cc: devicetree@vger.kernel.org, Sebastian Reichel , Michal Tomek , Damien Le Moal , Jon Lin , Niklas Cassel , linux-phy@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org Subject: [PATCH 0/2] rockchip pcie3-phy separate refclk support Date: Thu, 11 Apr 2024 15:01:46 +0200 Message-ID: <20240411130150.128107-1-cassel@kernel.org> X-Mailer: git-send-email 2.44.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240411_060200_917941_DD73D213 X-CRM114-Status: UNSURE ( 9.31 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org This series is based on: linux-phy phy/fixes (Since there are other rockchip,pcie3-phy changes there that have not yet reached mainline and which would otherwise have caused conflicts.) Hello all, The rockchip,pcie3-phy PHY in rk3588 is by default configured to run in "common reference clock" mode. (Which is a sensible default, as the most commonly used clock configuration is "common reference clock".) However, PCIe also defines two other configurations where the Root Complex and Endpoint uses separate reference clocks: SRNS and SRIS. Having the Root Complex PHY configured in "common reference clock mode" while having an Endpoint connected which is supplying its own reference clock (i.e. SRNS or SRIS configuration), will either result in the link training failing, or a highly unstable link that continuously jumps between link states L0 and recovery. Add a rockchip specific device tree property that can be added to the rk3588 Root Complex device tree PHY node, if the connected Endpoint device is using a separate refererence clock. This way we will get a stable link when using an Endpoint configured in SRNS or SRIS mode. Kind regards, Niklas Niklas Cassel (2): dt-bindings: phy: rockchip,pcie3-phy: add rockchip,rx-common-refclk-mode phy: rockchip-snps-pcie3: add support for rockchip,rx-common-refclk-mode .../bindings/phy/rockchip,pcie3-phy.yaml | 10 +++++ .../phy/rockchip/phy-rockchip-snps-pcie3.c | 37 +++++++++++++++++++ 2 files changed, 47 insertions(+)