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msm:pci: Usage of disable_pc in multiclient scenario

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In PCIe driver disable power collapse is
a bool variable, this causes problem in
multi client scenario as there is no vote
aggregation.

This Change is to support enable/disable power collapse
in multi client envirnoment.

Change-Id: Ib126958a18c4be831bf2b993e3a96eaae1a59435
Signed-off-by: Ramya SR <rsr@codeaurora.org>
This commit is contained in:
Ramya SR 2021-11-07 20:27:19 +05:30 • committed by Ramya SR
commit f9f4c25c5b
1 changed files with 10 additions and 7 deletions
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17
drivers/pci/controller/pci-msm.c
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@ -790,7 +790,7 @@ struct msm_pcie_dev_t {
enum msm_pcie_link_status link_status;
bool user_suspend;
bool disable_pc;
uint32_t disable_pc;
struct pci_saved_state *default_state;
struct pci_saved_state *saved_state;
@ -7973,8 +7973,8 @@ int msm_pcie_pm_control(enum msm_pcie_pm_opt pm_opt, u32 busnr, void *user,
break;
case MSM_PCIE_DISABLE_PC:
PCIE_DBG(pcie_dev,
"User of RC%d requests to keep the link always alive.\n",
pcie_dev->rc_idx);
"User of RC%d with vendor_id:0x%x device_id:0x%x requests to keep the link always alive.\n",
pcie_dev->rc_idx, pcidev->vendor, pcidev->device);
spin_lock_irqsave(&pcie_dev->cfg_lock, pcie_dev->irqsave_flags);
if (pcie_dev->suspending) {
PCIE_ERR(pcie_dev,
@ -7982,17 +7982,20 @@ int msm_pcie_pm_control(enum msm_pcie_pm_opt pm_opt, u32 busnr, void *user,
pcie_dev->rc_idx);
ret = MSM_PCIE_ERROR;
} else {
pcie_dev->disable_pc = true;
pcie_dev->disable_pc++;
}
spin_unlock_irqrestore(&pcie_dev->cfg_lock,
pcie_dev->irqsave_flags);
break;
case MSM_PCIE_ENABLE_PC:
PCIE_DBG(pcie_dev,
"User of RC%d cancels the request of alive link.\n",
pcie_dev->rc_idx);
"User of RC%d with vendor_id:0x%x device_id:0x%x cancels the request of alive link.\n",
pcie_dev->rc_idx, pcidev->vendor, pcidev->device);
spin_lock_irqsave(&pcie_dev->cfg_lock, pcie_dev->irqsave_flags);
pcie_dev->disable_pc = false;
if (pcie_dev->disable_pc > 0)
pcie_dev->disable_pc--;
else
PCIE_ERR(pcie_dev, "PCIe:RC%d cannot call ENABLE_PC", pcie_dev->rc_idx);
spin_unlock_irqrestore(&pcie_dev->cfg_lock,
pcie_dev->irqsave_flags);
break;