> > Introduced helper function dw_pcie_get_ltssm to retrieve > SMLH_LTSS_STATE. > Added API pme_turn_off and exit_from_l2 for managing L2/L3 state > transitions. > > Typical L2 entry workflow: > > 1. Transmit PME turn off signal to PCI devices. > 2. Await link entering L2_IDLE state. > 3. Transition Root complex to D3 state. > > Typical L2 exit workflow: > > 1. Transition Root complex to D0 state. > 2. Issue exit from L2 command. > 3. Reinitialize PCI host. > 4. Wait for link to become active. > > Signed-off-by: Frank Li <Frank.Li@xxxxxxx> > --- Ping > Change from v2 to v3: > - Basic rewrite whole patch according rob herry suggestion. > put common function into dwc, so more soc can share the same logic. >
