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pci: msm: Add support to disable L1SS sleep

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Read device tree property qcom,l1ss-sleep-disable
to prevent sending L1SS sleep enable and disable
rpmsg to DRV processor. This support is added to
prevent PCIe link down caused due to manually
operating phy PLL.

Change-Id: I2f96f3dc186d3af0ffad110807204936af58814a
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
This commit is contained in:
Hemant Kumar 2020-07-01 12:02:06 -07:00
parent 0ea391bae1
commit 4e6f18d642
1 changed files with 7 additions and 2 deletions
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9
drivers/pci/controller/pci-msm.c
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@ -745,6 +745,7 @@ struct msm_pcie_drv_info {
u16 reply_seq;
u32 timeout_ms; /* IPC command timeout */
u32 l1ss_timeout_us;
u32 l1ss_sleep_disable;
struct completion completion;
/* for DRV SSR */
@ -5317,6 +5318,9 @@ static int msm_pcie_setup_drv(struct msm_pcie_dev_t *pcie_dev,
drv_info->dev_id = pcie_dev->rc_idx;
of_property_read_u32(of_node, "qcom,l1ss-sleep-disable",
&drv_info->l1ss_sleep_disable);
ret = of_property_read_u32(of_node, "qcom,phy-manage-pll",
&phy_manage_pll);
if (!ret && phy_manage_pll) {
@ -6621,7 +6625,7 @@ static int msm_pcie_drv_resume(struct msm_pcie_dev_t *pcie_dev)
mutex_lock(&pcie_dev->setup_lock);
/* if rpdev is NULL then DRV subsystem is powered down */
if (rpdev) {
if (!drv_info->l1ss_sleep_disable && rpdev) {
ret = msm_pcie_drv_send_rpmsg(pcie_dev, rpdev,
&drv_info->drv_disable_l1ss_sleep);
if (ret)
@ -6796,7 +6800,8 @@ static int msm_pcie_drv_suspend(struct msm_pcie_dev_t *pcie_dev,
msm_pcie_vreg_deinit(pcie_dev);
/* enable L1ss sleep if client allows it */
if (!(options & MSM_PCIE_CONFIG_NO_L1SS_TO))
if (!drv_info->l1ss_sleep_disable &&
!(options & MSM_PCIE_CONFIG_NO_L1SS_TO))
msm_pcie_drv_send_rpmsg(pcie_dev, rpdev,
&drv_info->drv_enable_l1ss_sleep);