From patchwork Tue Oct 15 12:47:34 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Georg Gottleuber X-Patchwork-Id: 13836341 Received: from mail.tuxedocomputers.com (mail.tuxedocomputers.com [157.90.84.7]) (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 BF0261C07CD; Tue, 15 Oct 2024 12:47:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=157.90.84.7 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728996470; cv=none; b=dGQ8C5cNqITLR4ii0kfCLtVx+LvSfjuKKet+I5yhosCL4ihflcbUeWfDixRylw17/SGVzZsPceh/Fdd06j8Naa1/7SafQ1iEGzWcQ5TlC3u9oixfq1Rg5EW1ouvZiZn/bHGXxR36Z7PzVH05A3iujM7Em50rxBGsHeS2QRgNJ1M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728996470; c=relaxed/simple; bh=K9D3hkjeg/gOkvrq0dJpGPHws4AK7bgMeTDsaOTFeyo=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=d41IBxjTtewRCaOrCvaycXfAlGR1vdHrzx8tbvvfJvX6HO1ZOzPVi7UIjuvg79cg79P78QrudvCG5fNmJPGHTkQRrRKly2CtnQzMssm50x9xyaQ7s0o8SyA/Q9CK7QPh9KxYG1zfqYpy9CNJDcCr3/d5jSlt0nhfwk+YLkGxs9I= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=tuxedocomputers.com; spf=pass smtp.mailfrom=tuxedocomputers.com; dkim=pass (1024-bit key) header.d=tuxedocomputers.com header.i=@tuxedocomputers.com header.b=MQ1+8rDx; arc=none smtp.client-ip=157.90.84.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=tuxedocomputers.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=tuxedocomputers.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=tuxedocomputers.com header.i=@tuxedocomputers.com header.b="MQ1+8rDx" Received: from [192.168.178.76] (host-212-18-30-247.customer.m-online.net [212.18.30.247]) (Authenticated sender: g.gottleuber@tuxedocomputers.com) by mail.tuxedocomputers.com (Postfix) with ESMTPSA id 9F7952FC0059; Tue, 15 Oct 2024 14:47:34 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tuxedocomputers.com; s=default; t=1728996458; 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: in-reply-to:in-reply-to:references:references; bh=3mvGkJznbmh3jps4clef9o8wCS2/J44uxG/Nxu7qcpw=; b=MQ1+8rDx790ZGrh/YMPgRtfVrESZIDTtyW2gIxC9L66o+J3Ag+yQGh8aPC/Eg+TZkb09aP VGraZ542zKdYOBLrf7QREjmObpDYP+0xYrkinLWFTnsnyGpgt9r5njqWNqRrpsQINvbXH7 bOyPz5xfXdlSPwI0Jz4bKcasCV9NYdw= Authentication-Results: mail.tuxedocomputers.com; auth=pass smtp.auth=g.gottleuber@tuxedocomputers.com smtp.mailfrom=g.gottleuber@tuxedocomputers.com Message-ID: <4a517433-d105-4e2b-86f8-335e7c537d10@tuxedocomputers.com> Date: Tue, 15 Oct 2024 14:47:34 +0200 Precedence: bulk X-Mailing-List: linux-mmc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: [RFC PATCH 1/1] mmc: sdhci-pci-gli: fix x86/S0ix SoCs suspend for GL9767 To: Ulf Hansson Cc: victor.shih@genesyslogic.com.tw, Lucas.Lai@genesyslogic.com.tw, Greg.tu@genesyslogic.com.tw, HL.Liu@genesyslogic.com.tw, adrian.hunter@intel.com, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, Ben Chuang , Georg Gottleuber References: <8235497b-421c-4af7-90e4-95ad4e271ead@tuxedocomputers.com> Content-Language: en-US From: Georg Gottleuber In-Reply-To: Adapt commit 1202d617e3d04c ("mmc: sdhci-pci-gli: fix LPM negotiation so x86/S0ix SoCs can suspend") also for GL9767 card reader. This patch was written without specs or deeper knowledge of PCI sleep states. Tests show that S0ix is reached and a lower power consumption when suspended (6 watts vs 1.2 watts for TUXEDO InfinityBook Pro Gen9 Intel). The function of the card reader appears to be normal. Link: https://bugzilla.kernel.org/show_bug.cgi?id=219284 Co-developed-by: Christoffer Sandberg Signed-off-by: Christoffer Sandberg Signed-off-by: Georg Gottleuber --- drivers/mmc/host/sdhci-pci-gli.c | 65 +++++++++++++++++++++++++++++++- 1 file changed, 64 insertions(+), 1 deletion(-) { @@ -1470,6 +1496,42 @@ static int gl9763e_suspend(struct sdhci_pci_chip *chip) gl9763e_set_low_power_negotiation(slot, false); return ret; } + +static int gl9767_resume(struct sdhci_pci_chip *chip) +{ + struct sdhci_pci_slot *slot = chip->slots[0]; + int ret; + + ret = sdhci_pci_gli_resume(chip); + if (ret) + return ret; + + gl9767_set_low_power_negotiation(slot, false); + + return 0; +} + +static int gl9767_suspend(struct sdhci_pci_chip *chip) +{ + struct sdhci_pci_slot *slot = chip->slots[0]; + int ret; + + /* + * Certain SoCs can suspend only with the bus in low- + * power state, notably x86 SoCs when using S0ix. + * Re-enable LPM negotiation to allow entering L1 state + * and entering system suspend. + */ + gl9767_set_low_power_negotiation(slot, true); + + ret = sdhci_suspend_host(slot->host); + if (ret) { + gl9767_set_low_power_negotiation(slot, false); + return ret; + } + + return 0; +} #endif static int gli_probe_slot_gl9763e(struct sdhci_pci_slot *slot) @@ -1605,6 +1667,7 @@ const struct sdhci_pci_fixes sdhci_gl9767 = { .probe_slot = gli_probe_slot_gl9767, .ops = &sdhci_gl9767_ops, #ifdef CONFIG_PM_SLEEP - .resume = sdhci_pci_gli_resume, + .resume = gl9767_resume, + .suspend = gl9767_suspend, #endif }; diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c index 0f81586a19df..40f43f5cd5c7 100644 --- a/drivers/mmc/host/sdhci-pci-gli.c +++ b/drivers/mmc/host/sdhci-pci-gli.c @@ -1205,6 +1205,32 @@ static void gl9763e_set_low_power_negotiation(struct sdhci_pci_slot *slot, pci_write_config_dword(pdev, PCIE_GLI_9763E_VHS, value); } +static void gl9767_set_low_power_negotiation(struct sdhci_pci_slot *slot, + bool enable) +{ + struct pci_dev *pdev = slot->chip->pdev; + u32 value; + + pci_read_config_dword(pdev, PCIE_GLI_9767_VHS, &value); + value &= ~GLI_9767_VHS_REV; + value |= FIELD_PREP(GLI_9767_VHS_REV, GLI_9767_VHS_REV_W); + pci_write_config_dword(pdev, PCIE_GLI_9767_VHS, value); + + pci_read_config_dword(pdev, PCIE_GLI_9767_CFG, &value); + + if (enable) + value &= ~PCIE_GLI_9767_CFG_LOW_PWR_OFF; + else + value |= PCIE_GLI_9767_CFG_LOW_PWR_OFF; + + pci_write_config_dword(pdev, PCIE_GLI_9767_CFG, value); + + pci_read_config_dword(pdev, PCIE_GLI_9767_VHS, &value); + value &= ~GLI_9767_VHS_REV; + value |= FIELD_PREP(GLI_9767_VHS_REV, GLI_9767_VHS_REV_R); + pci_write_config_dword(pdev, PCIE_GLI_9767_VHS, value); +} + static void sdhci_set_gl9763e_signaling(struct sdhci_host *host, unsigned int timing)