Commit 0700b462 authored Oct 13, 2020 by Nitesh Gupta Committed by Gerrit - the friendly Code Review server Mar 30, 2022

msm: ep_pcie: unset ltssm_en bit in case of link failure



In cases where the PCIe enumeration fails after enabling LTSSM
in HLOS, we need to set ltssm_en bit properly in order for
subsequent enumeration to go through. This change unsets the
ltssm_en bit in case of link failure.

Change-Id: Ic179f1bbc88523345566c1afa78e5218c872b556
Signed-off-by: Nitesh Gupta <nitegupt@codeaurora.org>

parent 521fadd2

drivers/platform/msm/ep_pcie/ep_pcie_core.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -2003,6 +2003,11 @@ int ep_pcie_core_enable_endpoint(enum ep_pcie_options opt)

		link_fail:
		dev->power_on = false;
		if (dev->phy_rev >= 3)
		ep_pcie_write_mask(dev->parf + PCIE20_PARF_LTSSM, BIT(8), 0);
		else
		ep_pcie_write_mask(dev->elbi + PCIE20_ELBI_SYS_CTRL, BIT(0), 0);

		if (!ep_pcie_debug_keep_resource)
		ep_pcie_pipe_clk_deinit(dev);
		pipe_clk_fail: