From patchwork Thu Apr 25 07:09:36 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claudiu Beznea X-Patchwork-Id: 792233 Received: from mail-wm1-f44.google.com (mail-wm1-f44.google.com [209.85.128.44]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CC2F717E for ; Thu, 25 Apr 2024 07:09:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.44 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714028987; cv=none; b=C2q3WkZ84iZa2zi0Zo1aByMWyhrapdxfdFXkgq4PJ/6tXbdKrzEUHf6BlN6GSTcRzCseUt9IuHymV0/41jAZfNcDSm1MRWJNOTMnJKrY/xIEVZlmhBHjrnVVzuY1sFmdUvRbL2540Z4nNBAPQsTB3ufFAPuJHHk+6Lowa2yi0Y4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714028987; c=relaxed/simple; bh=i5csNzvKyzY2KMUo9Pio2GiNuzzW6XfxG41GjBSLsac=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=iY807AyTYih0pS1XqpeQjyV+ZYFfM9Uw0nGC8bfks7pGDc2zpiV7RQDCGfwV+Rn/cpogKAgRnYK+ebNRFy/IHlPu2bRaQhxFjxQF6Weuhj73b0Wfp4ykCvUw0K1wz0NTHWIWWqxLypXMVqFSq5mD5ccUfk7224p3eU2Zh+mukMo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=tuxon.dev; spf=pass smtp.mailfrom=tuxon.dev; dkim=pass (2048-bit key) header.d=tuxon.dev header.i=@tuxon.dev header.b=Jp78PMpa; arc=none smtp.client-ip=209.85.128.44 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=tuxon.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=tuxon.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=tuxon.dev header.i=@tuxon.dev header.b="Jp78PMpa" Received: by mail-wm1-f44.google.com with SMTP id 5b1f17b1804b1-41b5dc5e0d6so343625e9.0 for ; Thu, 25 Apr 2024 00:09:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tuxon.dev; s=google; t=1714028983; x=1714633783; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=AQYF0WsVGtCo94Lb/d7hDTJ0GE5m3M9fEwjH6JMfTuk=; b=Jp78PMpayEci9dugJllY9Tf2BIvaDqxcYGvOCvkWBJ5OQswdbCTymX4MlHzIW408jC z/8IQuoEDlI4r+9/Q0khKbxp+6bXstuuMYkLfYklfkMKlFAXcc2Dgmpt/Ijv9ulofyU5 JmNhXDkW5giZL6W1hlObz42PO5B7WUvv/uG0J4n4TkgEaZFE3Sw4JxS7zryf420ZiAfZ Dy8yd8l7H9cT3n9azbK/Y5rIdoMa8xpFCfNSdk4mWR31BNXazzGJSu0w5AlXoBRQsgaN A9J9TD6j31fCBhmzPo1dcqd5xYqokn7NHHKMWcX/wPcWgH5MhSvazhu5CVKSRLLB7JXa ttRQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1714028983; x=1714633783; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=AQYF0WsVGtCo94Lb/d7hDTJ0GE5m3M9fEwjH6JMfTuk=; b=cSDeE/xbvNP4I8d5j4iNEk3yT4zDpYt+dmkP862RectkTx/K+IyMdB9nA0OTYTFf2J wdXEcY1Yy+aDXgIJnYUqLh57lfIbPB0eff3MqFWZb3JJ2Wxt4mcjm2YZJO4umnTpONRj sa0J0PN9SJueyZ1C+bfz+clDJLCBh91Pg2nR3YTRwij6iZLPS2Sr+mayEX+i4Z7iLFAB MPfUukLrAB0/jLCgGtB7wnG6INkwlkfaRDCOvSNNrBp2gZMSJKADMt0lZc5likcczgxJ /1NyaGVrRvrYc8OI6Ssh3MFdFeZ0QNH5xHTZL2hIpFPe7p8F9qeeWkchUHVkbGeN/FQj 7o/A== X-Forwarded-Encrypted: i=1; AJvYcCWLVFoeULeKWDiN2xslcLVdjY08RqG4rbpGJ+scqpPR9zPx4uQzYTwD5NWAMEQhmma3biSo5DsiTeMS0N9hNreoO4yodx+AP3k= X-Gm-Message-State: AOJu0YzjUNQAFhIk0QdZ7Ejb3+Di/Qv7vwyhtZdGv2NaasBP/FKsJED/ ZmaRa6zc7dywZRCV4u1ZgIRBK7MhitCW2yc98AAxJSqO/oRwzsUk4SqIK8AdgX4= X-Google-Smtp-Source: AGHT+IHJkzXfp5uKvrRKk7fveyZHLxowyJC99U0qlzXF2CleQH23oiAt0ns4de/tUOZmilj4QuBnRw== X-Received: by 2002:a05:600c:19ca:b0:41a:141c:e199 with SMTP id u10-20020a05600c19ca00b0041a141ce199mr3737837wmq.8.1714028983029; Thu, 25 Apr 2024 00:09:43 -0700 (PDT) Received: from claudiu-X670E-Pro-RS.. ([82.78.167.53]) by smtp.gmail.com with ESMTPSA id v11-20020a05600c444b00b00418d5b16f85sm26234186wmn.21.2024.04.25.00.09.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 Apr 2024 00:09:42 -0700 (PDT) From: Claudiu X-Google-Original-From: Claudiu To: gregkh@linuxfoundation.org, jirislaby@kernel.org, tony@atomide.com, andriy.shevchenko@linux.intel.com, l.sanfilippo@kunbus.com, tglx@linutronix.de, geert+renesas@glider.be, ulf.hansson@linaro.org, peng.fan@nxp.com Cc: linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, linux-pm@vger.kernel.org, claudiu.beznea@tuxon.dev, Claudiu Beznea , Geert Uytterhoeven Subject: [RFT PATCH v2] serial: core: Call device_set_awake_path() for console port Date: Thu, 25 Apr 2024 10:09:36 +0300 Message-Id: <20240425070936.547100-1-claudiu.beznea.uj@bp.renesas.com> X-Mailer: git-send-email 2.39.2 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Claudiu Beznea In case the UART port is used as a console, no_console_suspend is available in bootargs and UART port is part of a software-controlled power domain we need to call device_set_awake_path(). This lets the power domain core code know that this domain should not be powered off during system suspend. Otherwise, the UART port power domain is turned off, nothing is printed while suspending and the suspend/resume process is blocked. This was detected on the Renesas RZ/G3S SoC while adding support for power domains. Based on code investigation, this issue is present on other SoCs (e.g., Renesas R-Mobile A1 [1], IMX8QXP [2]) and different SoCs have particular implementation to handle it. Due to this the patch added the call of device_set_awake_path() in uart_suspend_port() instead of having it in the platform specific UART driver. [1] https://elixir.bootlin.com/linux/v6.9-rc5/source/drivers/pmdomain/renesas/rmobile-sysc.c#L116 [2] https://elixir.bootlin.com/linux/v6.9-rc5/source/drivers/pmdomain/imx/scu-pd.c#L357 Suggested-by: Ulf Hansson Suggested-by: Geert Uytterhoeven Signed-off-by: Claudiu Beznea Reviewed-by: Geert Uytterhoeven Tested-by: Geert Uytterhoeven Reviewed-by: Andy Shevchenko Reviewed-by: Tony Lindgren --- Changes in v2: - used device_set_awake_path() instead of device_set_wakeup_path() - moved the support in uart_suspend_port() to make it generic for other drivers - fixed typos in commit description - updated the commit description to reflect the new changes and the fact that support may be applied to other SoCs - added Suggested-by tag; this was initially proposed by Ulf to move it in the serial driver then Geert propose to have it more generic in uart_suspend_port() drivers/tty/serial/serial_core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index d8d797a7a1e3..6270baab668c 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -2409,6 +2409,7 @@ int uart_suspend_port(struct uart_driver *drv, struct uart_port *uport) uport->ops->stop_rx(uport); uart_port_unlock_irq(uport); } + device_set_awake_path(uport->dev); goto unlock; }