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pci: msm: Add support to send vote against DRV PC

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Some endpoints require to prevent DRV processor power
collapse in order to meet the latency requirement to
access DDR over PCIe link. Send the vote info as part
of DRV enable command over rpmsg.

Change-Id: Iac3e6a0cd4978be877ae305aad31ed02570e4f3c
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
This commit is contained in:
Hemant Kumar 2020-08-25 19:20:57 -07:00
commit 7db2e7aacd
2 changed files with 3 additions and 0 deletions
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2
drivers/pci/controller/pci-msm.c
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@ -6775,6 +6775,8 @@ static int msm_pcie_drv_suspend(struct msm_pcie_dev_t *pcie_dev,
/* disable global irq - no more linkdown/aer detection */
disable_irq(pcie_dev->irq[MSM_PCIE_INT_GLOBAL_INT].num);
drv_info->drv_enable.pkt.dword[2] = options & MSM_PCIE_CONFIG_NO_DRV_PC;
ret = msm_pcie_drv_send_rpmsg(pcie_dev, &drv_info->drv_enable);
if (ret) {
ret = -EBUSY;

1
include/linux/msm_pcie.h
View file

@ -13,6 +13,7 @@ enum msm_pcie_config {
MSM_PCIE_CONFIG_LINKDOWN = 0x2,
MSM_PCIE_CONFIG_NO_RECOVERY = 0x4,
MSM_PCIE_CONFIG_NO_L1SS_TO = 0x8,
MSM_PCIE_CONFIG_NO_DRV_PC = 0x10,
};
enum msm_pcie_pm_opt {