From patchwork Mon Feb 12 16:42:07 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Romain Gantois X-Patchwork-Id: 13553626 Received: from relay2-d.mail.gandi.net (relay2-d.mail.gandi.net [217.70.183.194]) (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 B42BE3D56A; Mon, 12 Feb 2024 16:41:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.194 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707756109; cv=none; b=CBoJTYdIQXukHQhd/Ffk9JdkjeJKsIjh71HZ6AZaLlBkgE7ZdXYcVRl4Z8yWldwpgwetjQQQiOfzxgMODg5ZNAMubbcMGaZshj69HS9CmUcUDo+HsKDnTywnaXOKDwfdca6f7J6XTj+2jU3F+vt83WXOnGWhNC89y1Ohp87FCVM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707756109; c=relaxed/simple; bh=+Ux3WdxUOEv3uO7Hlt69qCE9lDlSC0SPALTP0v2N2XA=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=AW1K2kyfzk0y90QDPCaaM/p1KqpIr1o4UMYdC4uD9OXzWo1xLbIL2QmymZTa2Ql7cKXQ2N4MLKIuWoH0i+maoP3eUH+U+sBjbOrNVoBLaqilXvXPbzLqjI8Ukx7qcddkOBOLPa4Fhk3oUSCIGcl+q1Q6lU9GYwkaS4IqgLEFuF8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=G+oRZRVz; arc=none smtp.client-ip=217.70.183.194 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="G+oRZRVz" Received: by mail.gandi.net (Postfix) with ESMTPSA id 334F340004; Mon, 12 Feb 2024 16:41:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1707756104; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=zhKJediQ9A/HvPfmx+8A0oshk4y1nUibJBToc7DKHZU=; b=G+oRZRVzii3jMfJBrOKYfUIqX6kjPsnAYi+mFwouK9738FWpTDfZsC+EXP0HX9VMybAMw1 khoOBjdTpUWIQLaJNLbHhpKqLdEeoAMLlT7ClOgj62CfgtkTOCMaFIGeiwZh6GMVCIR4IM 0jvL3MWOCh+KSDZKYgRduaLRLyJ60uSCB2c+WDlmli71kFFdN/A5vQzRHRd88/oOhdoo0c GO61yTjNBO6jmRKnn7q4nU1SMx9MISFSoZaxFoaTLOIw0TAvjqAtMhal6NxEhYH5Js/j9Z VN82rJhSFdLIK1JLM6EvKt5/gBmnbBNcg6E65gxK2KwuWKG5Hc2U57i8aa1X8Q== From: Romain Gantois Subject: [PATCH net-next v3 0/7] Fix missing PHY-to-MAC RX clock Date: Mon, 12 Feb 2024 17:42:07 +0100 Message-Id: <20240212-rxc_bugfix-v3-0-e9f2eb6b3b05@bootlin.com> Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAGBKymUC/1WOyw6CMBBFf4V07ZC+eMSV/2GIKWUKTbQ1bSUYw r9bcYPLM3PnzF1JxGAxknOxkoCzjda7DOJUED0pNyLYITPhlEvKeA1h0bf+NRq7wCCbXvRMiUY akg+eAfN4l12JwwQOl0S6vDHBPyBNAdVBRgWTvOVNyepWcAYMckpZV47KJW/jpfc+3TNr//jqJ xuTD++96sz3Jz+RoMdWMwcKFdZaZC9Whv55um3bPtBSOn31AAAA To: Russell King , Andrew Lunn , Heiner Kallweit , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Alexandre Torgue , Jose Abreu , Maxime Coquelin , =?utf-8?b?Q2zDqW1lbnQgTMOp?= =?utf-8?b?Z2Vy?= Cc: Maxime Chevallier , Miquel Raynal , Thomas Petazzoni , netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-renesas-soc@vger.kernel.org, Romain Gantois , Clark Wang X-Mailer: b4 0.12.4 X-GND-Sasl: romain.gantois@bootlin.com Hello everyone, This is version three of my series that addresses the issue with some MAC/PHY combinations. Notable changes in v3: - Removed the "interface" argument from pcs_init(). - Added a kernel doc for pcs_init(). Notable changes in v2: - Introduced a pcs op for initializing hardware required for MAC initialization, instead of using phylink_validate() for this purpose. - Refactored stmmac to use a generic PCS reference in mac_device_info instead of a model-specific field. There is an issue with some stmmac/PHY combinations that has been reported some time ago in a couple of different series: Clark Wang's report: https://lore.kernel.org/all/20230202081559.3553637-1-xiaoning.wang@nxp.com/ Clément Léger's report: https://lore.kernel.org/linux-arm-kernel/20230116103926.276869-4-clement.leger@bootlin.com/ Stmmac controllers require an RX clock signal from the MII bus to perform their hardware initialization successfully. This causes issues with some PHY/PCS devices. If these devices do not bring the clock signal up before the MAC driver initializes its hardware, then said initialization will fail. This can happen at probe time or when the system wakes up from a suspended state. This series introduces new flags for phy_device and phylink_pcs. These flags allow MAC drivers to signal to PHY/PCS drivers that the RX clock signal should be enabled as soon as possible, and that it should always stay enabled. I have included specific uses of these flags that fix the RZN1 GMAC1 stmmac driver that I am currently working on and that is not yet upstream. I have also included changes to the at803x PHY driver that should fix the issue that Clark Wang was having. Clark, could you please confirm that this series fixes your issue with the at803x PHY? Best Regards, Romain Romain Gantois (2): net: phy: add rxc_always_on flag to phylink_pcs net: pcs: rzn1-miic: Init RX clock early if MAC requires it Russell King (3): net: phy: add PHY_F_RXC_ALWAYS_ON to PHY dev flags net: stmmac: Signal to PHY/PCS drivers to keep RX clock on net: phy: at803x: Avoid hibernating if MAC requires RX clock .../net/ethernet/stmicro/stmmac/stmmac_main.c | 5 +++++ drivers/net/pcs/pcs-rzn1-miic.c | 18 +++++++++++++----- drivers/net/phy/at803x.c | 3 ++- drivers/net/phy/phylink.c | 13 ++++++++++++- include/linux/phy.h | 1 + include/linux/phylink.h | 9 +++++++++ 6 files changed, 42 insertions(+), 7 deletions(-) --- 2.43.0 --- - Link to v2: https://lore.kernel.org/r/20240130-rxc_bugfix-v2-0-5e6c3168e5f0@bootlin.com --- Maxime Chevallier (1): net: stmmac: don't rely on lynx_pcs presence to check for a PHY Romain Gantois (4): net: phylink: add rxc_always_on flag to phylink_pcs net: stmmac: Support a generic PCS field in mac_device_info net: stmmac: Signal to PHY/PCS drivers to keep RX clock on net: pcs: rzn1-miic: Init RX clock early if MAC requires it Russell King (2): net: phylink: add PHY_F_RXC_ALWAYS_ON to PHY dev flags net: phy: qcom: at803x: Avoid hibernating if MAC requires RX clock drivers/net/ethernet/stmicro/stmmac/common.h | 2 +- .../net/ethernet/stmicro/stmmac/dwmac-socfpga.c | 8 ++--- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 15 ++++---- drivers/net/pcs/pcs-rzn1-miic.c | 27 ++++++++++++++ drivers/net/phy/phylink.c | 24 ++++++++++++- drivers/net/phy/qcom/at803x.c | 3 +- include/linux/phy.h | 1 + include/linux/phylink.h | 42 ++++++++++++++++++++++ 8 files changed, 109 insertions(+), 13 deletions(-) --- base-commit: 0f37666d87d2dea42ec21776c3d562b7cbd71612 change-id: 20240126-rxc_bugfix-d47b3b1a374f Best regards,