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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 <mika.westerberg@linux.intel.com>
This commit is contained in:
Mika Westerberg 2020-07-23 16:43:00 +03:00
parent 6651c91de0
commit 59ed8dcad6
1 changed files with 16 additions and 9 deletions
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25
drivers/thunderbolt/nhi_ops.c
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@ -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);