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usb: pd: Don't retry sending Source Capabilities if PD capable

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If connected to a sink that we already know is PD capable, the
next time Source Capabilities is sent, whether due to reset or
in response Get_Source_Capabilities, upon failure should not
retry for nCapsCount times. Instead, simply issue a Soft Reset.

Change-Id: Ia45600f013555814c008edf60e0daf599d9f9dee
Signed-off-by: Pratham Pratap <prathampratap@codeaurora.org>
Signed-off-by: Rohith Kollalsi <rkollals@codeaurora.org>
This commit is contained in:
Pratham Pratap 2019-08-21 18:46:43 +05:30 committed by Gerrit - the friendly Code Review server
parent 4f9559a887
commit 8048946fcc
1 changed files with 6 additions and 1 deletions
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7
drivers/usb/pd/policy_engine.c
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@ -1,4 +1,4 @@
/* Copyright (c) 2016-2019, The Linux Foundation. All rights reserved.
/* Copyright (c) 2016-2020, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@ -895,6 +895,7 @@ static void pd_send_hard_reset(struct usbpd *pd)
pd->hard_reset_count++;
pd_phy_signal(HARD_RESET_SIG);
pd->in_pr_swap = false;
pd->pd_connected = false;
power_supply_set_property(pd->usb_psy, POWER_SUPPLY_PROP_PR_SWAP, &val);
}
@ -2688,6 +2689,10 @@ static void usbpd_sm(struct work_struct *w)
ret = pd_send_msg(pd, MSG_SOURCE_CAPABILITIES, default_src_caps,
ARRAY_SIZE(default_src_caps), SOP_MSG);
if (ret) {
if (pd->pd_connected) {
usbpd_set_state(pd, PE_SEND_SOFT_RESET);
return;
}
pd->caps_count++;
if (pd->caps_count >= PD_CAPS_COUNT) {
usbpd_dbg(&pd->dev, "Src CapsCounter exceeded, disabling PD\n");