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Commit 96ff3c62 authored by Siva Kumar Akkireddi's avatar Siva Kumar Akkireddi
Browse files

msm: ep_pcie: Move tcsr perst delatch before link-up check 



The tcsr perst delatch is done before the link-up check in
ep_pcie_core_enable_endpoint to ensure it happens even in
the bios-locking case.

Change-Id: Ife595c7e49175b71f38087dea29ee521bf1c58c7
Signed-off-by: default avatarSiva Kumar Akkireddi <sivaa@codeaurora.org>
parent 22b0c562

drivers/platform/msm/ep_pcie/ep_pcie_core.c

+17 −16
Original line number Diff line number Diff line 
/* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.

/* Copyright (c) 2015-2019, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -1360,6 +1360,21 @@ int ep_pcie_core_enable_endpoint(enum ep_pcie_options opt) 
		}



		dev->power_on = true;



		 EP_PCIE_DBG(dev,

			 "TCSR PERST_EN value before configure:0x%x\n",

			 readl_relaxed(dev->tcsr_perst_en + 0x258));



		 /*

		  * Delatch PERST_EN with TCSR to avoid device reset

		  * during host reboot case.

		  */

		 writel_relaxed(0, dev->tcsr_perst_en + 0x258);



		 EP_PCIE_DBG(dev,

			 "TCSR PERST_EN value after configure:0x%x\n",

			 readl_relaxed(dev->tcsr_perst_en));



		 /* check link status during initial bootup */

		if (!dev->enumerated) {

			val = readl_relaxed(dev->parf + PCIE20_PARF_PM_STTS);
@@ -1400,20 +1415,6 @@ int ep_pcie_core_enable_endpoint(enum ep_pcie_options opt) 
	if (!(opt & EP_PCIE_OPT_ENUM))

		goto out;



	EP_PCIE_DBG(dev,

		"TCSR PERST_EN value before configure:0x%x\n",

		readl_relaxed(dev->tcsr_perst_en + 0x258));



	/*

	 * Delatch PERST_EN with TCSR to avoid device reset

	 * during host reboot case.

	 */

	writel_relaxed(0, dev->tcsr_perst_en + 0x258);



	EP_PCIE_DBG(dev,

		"TCSR PERST_EN value after configure:0x%x\n",

		readl_relaxed(dev->tcsr_perst_en));



	if (opt & EP_PCIE_OPT_AST_WAKE) {

		/* assert PCIe WAKE# */

		EP_PCIE_INFO(dev, "PCIe V%d: assert PCIe WAKE#.\n",