From 59ed8dcad6c87ced975fe55364bd0c7698e2b261 Mon Sep 17 00:00:00 2001 From: Mika Westerberg Date: Thu, 23 Jul 2020 16:43:00 +0300 Subject: [PATCH] thunderbolt: Software CM only should set force power in Tiger Lake When Software CM is running it should not send any NHI mailbox command during PM flows. Only force power bit needs to be set and cleared so change Tiger Lake (well and Ice Lake) nhi_ops to take this into account. Signed-off-by: Mika Westerberg --- drivers/thunderbolt/nhi_ops.c | 25 ++++++++++++++++--------- 1 file changed, 16 insertions(+), 9 deletions(-) diff --git a/drivers/thunderbolt/nhi_ops.c b/drivers/thunderbolt/nhi_ops.c index 28583f9faf46..96da07e88c52 100644 --- a/drivers/thunderbolt/nhi_ops.c +++ b/drivers/thunderbolt/nhi_ops.c @@ -121,31 +121,38 @@ static void icl_nhi_set_ltr(struct tb_nhi *nhi) static int icl_nhi_suspend(struct tb_nhi *nhi) { + struct tb *tb = pci_get_drvdata(nhi->pdev); int ret; if (icl_nhi_is_device_connected(nhi)) return 0; - /* - * If there is no device connected we need to perform both: a - * handshake through LC mailbox and force power down before - * entering D3. - */ - icl_nhi_lc_mailbox_cmd(nhi, ICL_LC_PREPARE_FOR_RESET); - ret = icl_nhi_lc_mailbox_cmd_complete(nhi, ICL_LC_MAILBOX_TIMEOUT); - if (ret) - return ret; + if (tb_switch_is_icm(tb->root_switch)) { + /* + * If there is no device connected we need to perform + * both: a handshake through LC mailbox and force power + * down before entering D3. + */ + icl_nhi_lc_mailbox_cmd(nhi, ICL_LC_PREPARE_FOR_RESET); + ret = icl_nhi_lc_mailbox_cmd_complete(nhi, ICL_LC_MAILBOX_TIMEOUT); + if (ret) + return ret; + } return icl_nhi_force_power(nhi, false); } static int icl_nhi_suspend_noirq(struct tb_nhi *nhi, bool wakeup) { + struct tb *tb = pci_get_drvdata(nhi->pdev); enum icl_lc_mailbox_cmd cmd; if (!pm_suspend_via_firmware()) return icl_nhi_suspend(nhi); + if (!tb_switch_is_icm(tb->root_switch)) + return 0; + cmd = wakeup ? ICL_LC_GO2SX : ICL_LC_GO2SX_NO_WAKE; icl_nhi_lc_mailbox_cmd(nhi, cmd); return icl_nhi_lc_mailbox_cmd_complete(nhi, ICL_LC_MAILBOX_TIMEOUT);