From patchwork Sun Jan 7 14:03:08 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 13512911 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 33235134B3 for ; Sun, 7 Jan 2024 14:03:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="bKBBwfvh" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1704636204; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Un+jkAxYYgZPi16AyYe7Ij76j+a9JbtQeeYu35ikdaA=; b=bKBBwfvhJcjPqkJOn2pcWQ7t+3p6V4r11jypXhqR59o8QYJVKAFah5xNWpThSvcvDhWVBV ZzfrHauitoQYF1hEGFHHEFJ11qB+z+/YTOHSZb+xeQI0n/wSqkIr87AgYCZItwhI7kZ1++ cew0CcaLaH9HBG9YY70fcaQ3ab1Tgfc= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-638-9yElmF2ePuWSgyK2GbLebQ-1; Sun, 07 Jan 2024 09:03:20 -0500 X-MC-Unique: 9yElmF2ePuWSgyK2GbLebQ-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id D4139863010; Sun, 7 Jan 2024 14:03:19 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.192.59]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0BBE02026D66; Sun, 7 Jan 2024 14:03:17 +0000 (UTC) From: Hans de Goede To: Johannes Stezenbach , Takashi Iwai , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Andy Shevchenko , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H . Peter Anvin" , Michael Turquette , Stephen Boyd Cc: Hans de Goede , platform-driver-x86@vger.kernel.org, x86@kernel.org, linux-clk@vger.kernel.org Subject: [PATCH v2 3/5] platform/x86: pmc_atom: Check state of PMC managed devices on s2idle Date: Sun, 7 Jan 2024 15:03:08 +0100 Message-ID: <20240107140310.46512-4-hdegoede@redhat.com> In-Reply-To: <20240107140310.46512-1-hdegoede@redhat.com> References: <20240107140310.46512-1-hdegoede@redhat.com> Precedence: bulk X-Mailing-List: linux-clk@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.4 From: Johannes Stezenbach This is a port of "pm: Add pm suspend debug notifier for South IPs" from the latte-l-oss branch of: from https://github.com/MiCode/Xiaomi_Kernel_OpenSource latte-l-oss With the new acpi_s2idle_dev_ops and acpi_register_lps0_dev() functionality this can now finally be ported to the mainline kernel without requiring adding non-upstreamable hooks into the cpu_idle driver mechanism. This adds a check that all hardware blocks in the South complex (controlled by PMC) are in a state that allows the SoC to enter S0i3 and prints an error message for any device in D0. Note the pmc_atom code is enabled by CONFIG_X86_INTEL_LPSS which already depends on ACPI. Signed-off-by: Johannes Stezenbach Signed-off-by: Takashi Iwai [hdegoede: Use acpi_s2idle_dev_ops, ignore fused off blocks, PMIC I2C] Signed-off-by: Hans de Goede --- Changes in v2: - Drop duplicated "pmc_atom: " prefix from pr_err() / pr_dbg() messages --- drivers/platform/x86/pmc_atom.c | 67 +++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) diff --git a/drivers/platform/x86/pmc_atom.c b/drivers/platform/x86/pmc_atom.c index 93a6414c6611..81ad66117365 100644 --- a/drivers/platform/x86/pmc_atom.c +++ b/drivers/platform/x86/pmc_atom.c @@ -6,6 +6,7 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include #include #include #include @@ -17,6 +18,7 @@ #include #include #include +#include struct pmc_bit_map { const char *name; @@ -448,6 +450,67 @@ static int pmc_setup_clks(struct pci_dev *pdev, void __iomem *pmc_regmap, return 0; } +#ifdef CONFIG_SUSPEND +static void pmc_dev_state_check(u32 sts, const struct pmc_bit_map *sts_map, + u32 fd, const struct pmc_bit_map *fd_map, + u32 sts_possible_false_pos) +{ + int index; + + for (index = 0; sts_map[index].name; index++) { + if (!(fd_map[index].bit_mask & fd) && + !(sts_map[index].bit_mask & sts)) { + if (sts_map[index].bit_mask & sts_possible_false_pos) + pm_pr_dbg("%s is in D0 prior to s2idle\n", + sts_map[index].name); + else + pr_err("%s is in D0 prior to s2idle\n", + sts_map[index].name); + } + } +} + +static void pmc_s2idle_check(void) +{ + struct pmc_dev *pmc = &pmc_device; + const struct pmc_reg_map *m = pmc->map; + u32 func_dis, func_dis_2; + u32 d3_sts_0, d3_sts_1; + u32 false_pos_sts_0, false_pos_sts_1; + + func_dis = pmc_reg_read(pmc, PMC_FUNC_DIS); + func_dis_2 = pmc_reg_read(pmc, PMC_FUNC_DIS_2); + d3_sts_0 = pmc_reg_read(pmc, PMC_D3_STS_0); + d3_sts_1 = pmc_reg_read(pmc, PMC_D3_STS_1); + + /* + * Some blocks are not used on lower-featured versions of the SoC and + * always report D0, add these to false_pos mask to log at debug level. + */ + if (m->d3_sts_1 == byt_d3_sts_1_map) { + /* BYT */ + false_pos_sts_0 = BIT_GBE | BIT_SATA | BIT_PCIE_PORT0 | + BIT_PCIE_PORT1 | BIT_PCIE_PORT2 | BIT_PCIE_PORT3 | + BIT_LPSS2_F5_I2C5; + false_pos_sts_1 = BIT_SMB | BIT_USH_SS_PHY | BIT_DFX; + } else { + /* CHT */ + false_pos_sts_0 = BIT_GBE | BIT_SATA | BIT_LPSS2_F7_I2C7; + false_pos_sts_1 = BIT_SMB | BIT_STS_ISH; + } + + /* Low part */ + pmc_dev_state_check(d3_sts_0, m->d3_sts_0, func_dis, m->func_dis, false_pos_sts_0); + + /* High part */ + pmc_dev_state_check(d3_sts_1, m->d3_sts_1, func_dis_2, m->func_dis_2, false_pos_sts_1); +} + +static struct acpi_s2idle_dev_ops pmc_s2idle_ops = { + .check = pmc_s2idle_check, +}; +#endif + static int pmc_setup_dev(struct pci_dev *pdev, const struct pci_device_id *ent) { struct pmc_dev *pmc = &pmc_device; @@ -485,6 +548,10 @@ static int pmc_setup_dev(struct pci_dev *pdev, const struct pci_device_id *ent) dev_warn(&pdev->dev, "platform clocks register failed: %d\n", ret); +#ifdef CONFIG_SUSPEND + acpi_register_lps0_dev(&pmc_s2idle_ops); +#endif + pmc->init = true; return ret; }