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pd: move tDRPHold to after vbus is on

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Move tDRPHold timeout to after vbus is on. This makes sure we give
the right amount of time for a dual-role device to recognize that
it should be the UFP.

BUG=none
BRANCH=samus
TEST=make buildall

Change-Id: I8432eb172783c689d636a435073bb86828488b06
Signed-off-by: Alec Berg <alecaberg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/227720
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Todd Broch <tbroch@chromium.org>
This commit is contained in:
Alec Berg
2014-11-05 13:31:42 -08:00
committed by chrome-internal-fetch
parent 493898bd6a
commit 5142cdce2d
1 changed files with 7 additions and 5 deletions
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12
common/usb_pd_protocol.c
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@@ -1416,10 +1416,6 @@ void pd_task(void)
set_state(port, PD_STATE_SRC_STARTUP);
caps_count = 0;
#ifdef CONFIG_USB_PD_DUAL_ROLE
/* Keep VBUS up for the hold period */
next_role_swap = get_time().val + PD_T_DRP_HOLD;
#endif
}
#ifdef CONFIG_USB_PD_DUAL_ROLE
/* Swap roles if time expired or VBUS is present */
@@ -1446,6 +1442,11 @@ void pd_task(void)
PD_STATE_SRC_DISCOVERY);
break;
case PD_STATE_SRC_DISCOVERY:
#ifdef CONFIG_USB_PD_DUAL_ROLE
/* Keep VBUS up for the hold period */
if (pd[port].last_state != pd[port].task_state)
next_role_swap = get_time().val + PD_T_DRP_HOLD;
#endif
/* Send source cap some minimum number of times */
if (caps_count < PD_CAPS_COUNT) {
/* Query capabilites of the other side */
@@ -1808,7 +1809,8 @@ void pd_task(void)
if (!pd_is_connected(port) || pd_is_power_swapping(port))
continue;
#endif
if (pd[port].power_role == PD_ROLE_SOURCE) {
if (pd[port].power_role == PD_ROLE_SOURCE &&
pd[port].task_state != PD_STATE_SRC_STARTUP) {
/* Source: detect disconnect by monitoring CC */
cc1_volt = pd_adc_read(port, pd[port].polarity);
#ifdef CONFIG_USB_PD_DUAL_ROLE