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Commit f8f05403 authored by Vivek Pernamitta's avatar Vivek Pernamitta
Browse files

msm: pci: print PCIE LTSSM state at DRV suspend and resume 



print PCIE LTSSM states at DRV suspend and resume.

Change-Id: Ia9767baf19f56a39b81f7ea447e5fd8ae172546f
Signed-off-by: default avatarVivek Pernamitta <vpernami@codeaurora.org>
parent 38055361

drivers/pci/controller/pci-msm.c

+11 −1
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/* Copyright (c) 2014-2020, The Linux Foundation. All rights reserved.*/

/* Copyright (c) 2014-2021, The Linux Foundation. All rights reserved.*/



#include <dt-bindings/regulator/qcom,rpmh-regulator-levels.h>

#include <linux/bitops.h>
@@ -6971,6 +6971,7 @@ static int msm_pcie_drv_resume(struct msm_pcie_dev_t *pcie_dev) 
	struct msm_pcie_clk_info_t *clk_info;

	u32 current_link_speed;

	int ret, i;

	u32 val;



	mutex_lock(&pcie_dev->recovery_lock);

	mutex_lock(&pcie_dev->setup_lock);
@@ -7047,6 +7048,10 @@ static int msm_pcie_drv_resume(struct msm_pcie_dev_t *pcie_dev) 


	enable_irq(pcie_dev->irq[MSM_PCIE_INT_GLOBAL_INT].num);



	val = readl_relaxed(pcie_dev->parf + PCIE20_PARF_LTSSM);

	PCIE_DBG(pcie_dev, "PCIe RC%d: LTSSM_STATE: %s\n",

		pcie_dev->rc_idx, TO_LTSSM_STR(val & 0x3f));



	mutex_unlock(&pcie_dev->setup_lock);

	mutex_unlock(&pcie_dev->recovery_lock);
@@ -7062,6 +7067,7 @@ static int msm_pcie_drv_suspend(struct msm_pcie_dev_t *pcie_dev, 
	struct msm_pcie_drv_tre *pkt = &drv_enable->pkt;

	struct msm_pcie_clk_info_t *clk_info;

	int ret, i;

	u32 val;



	if (!rpdev) {

		PCIE_ERR(pcie_dev, "PCIe: RC%d: DRV: no rpmsg device\n",
@@ -7093,6 +7099,10 @@ static int msm_pcie_drv_suspend(struct msm_pcie_dev_t *pcie_dev, 
	if (unlikely(drv_info->seq == MSM_PCIE_DRV_SEQ_RESV))

		drv_info->seq = 0;



	val = readl_relaxed(pcie_dev->parf + PCIE20_PARF_LTSSM);

	PCIE_DBG(pcie_dev, "PCIe RC%d: LTSSM_STATE: %s\n",

		pcie_dev->rc_idx, TO_LTSSM_STR(val & 0x3f));



	ret = rpmsg_trysend(rpdev->ept, drv_enable, sizeof(*drv_enable));

	if (ret) {

		PCIE_ERR(pcie_dev, "PCIe: RC%d: DRV: failed to send rpmsg\n",