From mboxrd@z Thu Jan 1 00:00:00 1970 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 A00E2CCA473 for ; Wed, 15 Jun 2022 13:16:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347525AbiFONQO (ORCPT ); Wed, 15 Jun 2022 09:16:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52772 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351651AbiFONQM (ORCPT ); Wed, 15 Jun 2022 09:16:12 -0400 Received: from alexa-out.qualcomm.com (alexa-out.qualcomm.com [129.46.98.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B43202DD53; Wed, 15 Jun 2022 06:16:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1655298971; x=1686834971; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=wzF6b6MTfDg6r5cQXsyGjFsRdC++A5N+KLhQ3vIsIjo=; b=GcchhxsvU9tYLShKkgwTRgpfC6AXfF5HeoIcyFp/u4fmZHgmufc7raju TD0vKKQSKyddZyeqFbD0qhnXqKxqsNEsMHFUjZq8q9HbHVJpmujt4/rfh PQOpMz/ZhWQMoSWivgQ0ZUVVQvap4eKxxWkjr1+kWHu32C3/xSz9PFV28 Q=; Received: from ironmsg-lv-alpha.qualcomm.com ([10.47.202.13]) by alexa-out.qualcomm.com with ESMTP; 15 Jun 2022 06:16:10 -0700 X-QCInternal: smtphost Received: from ironmsg01-blr.qualcomm.com ([10.86.208.130]) by ironmsg-lv-alpha.qualcomm.com with ESMTP/TLS/AES256-SHA; 15 Jun 2022 06:16:07 -0700 X-QCInternal: smtphost Received: from hu-krichai-hyd.qualcomm.com (HELO hu-sgudaval-hyd.qualcomm.com) ([10.213.110.37]) by ironmsg01-blr.qualcomm.com with ESMTP; 15 Jun 2022 18:45:44 +0530 Received: by hu-sgudaval-hyd.qualcomm.com (Postfix, from userid 4058933) id 4FDBF414F; Wed, 15 Jun 2022 18:45:43 +0530 (+0530) From: Krishna chaitanya chundru To: helgaas@kernel.org Cc: linux-pci@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, quic_vbadigan@quicinc.com, quic_hemantk@quicinc.com, quic_nitegupt@quicinc.com, quic_skananth@quicinc.com, quic_ramkri@quicinc.com, manivannan.sadhasivam@linaro.org, swboyd@chromium.org, Krishna chaitanya chundru , Andy Gross , Bjorn Andersson , Stanimir Varbanov , Lorenzo Pieralisi , Rob Herring , =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= , Bjorn Helgaas Subject: [PATCH v2] PCI: qcom: Allow L1 and its sub states Date: Wed, 15 Jun 2022 18:45:39 +0530 Message-Id: <1655298939-392-1-git-send-email-quic_krichai@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1654240730-31322-1-git-send-email-quic_krichai@quicinc.com> References: <1654240730-31322-1-git-send-email-quic_krichai@quicinc.com> Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Allow L1 and its sub-states in the qcom pcie driver. By default this is disabled in the hardware. So enabling it explicitly. Signed-off-by: Krishna chaitanya chundru --- drivers/pci/controller/dwc/pcie-qcom.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c index 6ab9089..0d8efcc 100644 --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -41,6 +41,9 @@ #define L23_CLK_RMV_DIS BIT(2) #define L1_CLK_RMV_DIS BIT(1) +#define PCIE20_PARF_PM_CTRL 0x20 +#define REQ_NOT_ENTR_L1 BIT(5) + #define PCIE20_PARF_PHY_CTRL 0x40 #define PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK GENMASK(20, 16) #define PHY_CTRL_PHY_TX0_TERM_OFFSET(x) ((x) << 16) @@ -1267,6 +1270,11 @@ static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie) val |= BIT(4); writel(val, pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL); + /* Enable L1 and L1ss */ + val = readl(pcie->parf + PCIE20_PARF_PM_CTRL); + val &= ~REQ_NOT_ENTR_L1; + writel(val, pcie->parf + PCIE20_PARF_PM_CTRL); + if (IS_ENABLED(CONFIG_PCI_MSI)) { val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT); val |= BIT(31); -- 2.7.4