Commit cfd2fdfd authored by Manivannan Sadhasivam's avatar Manivannan Sadhasivam Committed by Manivannan Sadhasivam
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PCI: dwc: Skip PME_Turn_Off broadcast and L2/L3 transition during suspend if link is not up 



During system suspend, if the PCIe link is not up, then there is no need
to broadcast PME_Turn_Off message and wait for L2/L3 transition. So skip
them.

Signed-off-by: default avatarManivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Signed-off-by: default avatarManivannan Sadhasivam <mani@kernel.org>
Tested-by: default avatarVincent Guittot <vincent.guittot@linaro.org>
Reviewed-by: default avatarFrank Li <Frank.Li@nxp.com>
Reviewed-by: default avatarShawn Lin <shawn.lin@rock-chips.com>
Link: https://patch.msgid.link/20251218-pci-dwc-suspend-rework-v2-1-5a7778c6094a@oss.qualcomm.com
parent f994bb8f

drivers/pci/controller/dwc/pcie-designware-host.c

+5 −1
Original line number Diff line number Diff line
@@ -1169,8 +1169,11 @@ static int dw_pcie_pme_turn_off(struct dw_pcie *pci) 
int dw_pcie_suspend_noirq(struct dw_pcie *pci)

{

	u8 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);

	int ret = 0;

	u32 val;

	int ret;



	if (!dw_pcie_link_up(pci))

		goto stop_link;



	/*

	 * If L1SS is supported, then do not put the link into L2 as some
@@ -1205,6 +1208,7 @@ int dw_pcie_suspend_noirq(struct dw_pcie *pci) 
	 */

	udelay(1);



stop_link:

	dw_pcie_stop_link(pci);

	if (pci->pp.ops->deinit)

		pci->pp.ops->deinit(&pci->pp);