From patchwork Fri Jun 2 14:40:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathias Nyman X-Patchwork-Id: 13265414 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DCBBCC77B7A for ; Fri, 2 Jun 2023 14:39:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236080AbjFBOjd (ORCPT ); Fri, 2 Jun 2023 10:39:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40954 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236056AbjFBOj3 (ORCPT ); Fri, 2 Jun 2023 10:39:29 -0400 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C1D231A7 for ; Fri, 2 Jun 2023 07:39:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1685716768; x=1717252768; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=C10LHrMOU7i8EyGeecYwaHg1yr0j9pLyC13iU7avK0s=; b=lQBkSp8Fbp963ZrNkafmHotaePgiKDtNb8pP4xsdrwz5WUDkdoWd3D+c wY0QTKtn7Fm1JnA2jat/RS04cvcqY2KXI4MIjc0G8mjmbE7F4x9IpbLZg psCOQ46NGWpqoDXYE75lAmqb78ZLNjldaBsAt7QW3DBWB2ceNDUyJT+XU F2el2fHevz4Zqz3+i0cgA41LoZk97v1yHJaCuaC5vwhOyTxoDW8FuRkQL g7fNQlOyJdOJgH8fHFmPktXBAq0i3wu4iM1gku8iV0Dzc3sXSmbwTWVP3 ErIeUSVEKwbjNr7miMqvrWcKbjGoE/qtN3f/Is2uLIorf5LfWIr/lPTCF A==; X-IronPort-AV: E=McAfee;i="6600,9927,10729"; a="358311330" X-IronPort-AV: E=Sophos;i="6.00,213,1681196400"; d="scan'208";a="358311330" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Jun 2023 07:39:13 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10729"; a="707877469" X-IronPort-AV: E=Sophos;i="6.00,213,1681196400"; d="scan'208";a="707877469" Received: from mattu-haswell.fi.intel.com ([10.237.72.199]) by orsmga002.jf.intel.com with ESMTP; 02 Jun 2023 07:39:10 -0700 From: Mathias Nyman To: Cc: , Weitao Wang , Mathias Nyman Subject: [PATCH 11/11] xhci: Add ZHAOXIN xHCI host U1/U2 feature support Date: Fri, 2 Jun 2023 17:40:09 +0300 Message-Id: <20230602144009.1225632-12-mathias.nyman@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230602144009.1225632-1-mathias.nyman@linux.intel.com> References: <20230602144009.1225632-1-mathias.nyman@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Weitao Wang Add U1/U2 feature support of xHCI for ZHAOXIN. Since both INTEL and ZHAOXIN need to check the tier where the device is located to determine whether to enabled U1/U2, remove the previous INTEL U1/U2 tier policy and add common policy in xhci_check_tier_policy. If vendor has specific U1/U2 enable policy,quirks can be add to declare. Suggested-by: Mathias Nyman Signed-off-by: Weitao Wang Signed-off-by: Mathias Nyman --- drivers/usb/host/xhci-pci.c | 1 + drivers/usb/host/xhci.c | 43 ++++++++++++++++--------------------- 2 files changed, 19 insertions(+), 25 deletions(-) diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index 88c16d91fb69..c6742bae41c0 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -523,6 +523,7 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci) if (pdev->vendor == PCI_VENDOR_ID_ZHAOXIN) { xhci->quirks |= XHCI_ZHAOXIN_HOST; + xhci->quirks |= XHCI_LPM_SUPPORT; if (pdev->device == 0x9202) { xhci->quirks |= XHCI_RESET_ON_RESUME; diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index 176969bf2d5c..5b73a7d281ed 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -4605,7 +4605,7 @@ static u16 xhci_calculate_u1_timeout(struct xhci_hcd *xhci, } } - if (xhci->quirks & XHCI_INTEL_HOST) + if (xhci->quirks & (XHCI_INTEL_HOST | XHCI_ZHAOXIN_HOST)) timeout_ns = xhci_calculate_intel_u1_timeout(udev, desc); else timeout_ns = udev->u1_params.sel; @@ -4669,7 +4669,7 @@ static u16 xhci_calculate_u2_timeout(struct xhci_hcd *xhci, } } - if (xhci->quirks & XHCI_INTEL_HOST) + if (xhci->quirks & (XHCI_INTEL_HOST | XHCI_ZHAOXIN_HOST)) timeout_ns = xhci_calculate_intel_u2_timeout(udev, desc); else timeout_ns = udev->u2_params.sel; @@ -4741,37 +4741,30 @@ static int xhci_update_timeout_for_interface(struct xhci_hcd *xhci, return 0; } -static int xhci_check_intel_tier_policy(struct usb_device *udev, +static int xhci_check_tier_policy(struct xhci_hcd *xhci, + struct usb_device *udev, enum usb3_link_state state) { - struct usb_device *parent; - unsigned int num_hubs; + struct usb_device *parent = udev->parent; + int tier = 1; /* roothub is tier1 */ - /* Don't enable U1 if the device is on a 2nd tier hub or lower. */ - for (parent = udev->parent, num_hubs = 0; parent->parent; - parent = parent->parent) - num_hubs++; + while (parent) { + parent = parent->parent; + tier++; + } - if (num_hubs < 2) - return 0; + if (xhci->quirks & XHCI_INTEL_HOST && tier > 3) + goto fail; + if (xhci->quirks & XHCI_ZHAOXIN_HOST && tier > 2) + goto fail; - dev_dbg(&udev->dev, "Disabling U1/U2 link state for device" - " below second-tier hub.\n"); - dev_dbg(&udev->dev, "Plug device into first-tier hub " - "to decrease power consumption.\n"); + return 0; +fail: + dev_dbg(&udev->dev, "Tier policy prevents U1/U2 LPM states for devices at tier %d\n", + tier); return -E2BIG; } -static int xhci_check_tier_policy(struct xhci_hcd *xhci, - struct usb_device *udev, - enum usb3_link_state state) -{ - if (xhci->quirks & XHCI_INTEL_HOST) - return xhci_check_intel_tier_policy(udev, state); - else - return 0; -} - /* Returns the U1 or U2 timeout that should be enabled. * If the tier check or timeout setting functions return with a non-zero exit * code, that means the timeout value has been finalized and we shouldn't look