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pd: avoid re-sending discovery VDMs after power swap

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Avoid re-sending discovery VDMs after power swap from source
to sink.

BUG=chrome-os-partner:40657
BRANCH=samus
TEST=tested connecting samus to samus. tested power swapping
back and forth and verify that we don't re-send discovery VDMs.
Tested soft reset and verified that we don't re-send discovery
VDMs. Tested hard reset and verified that we DO re-send
discovery VDMs.

Change-Id: Ib48c134f460eb776b7c6f5c1d86a5b56bb08ebcc
Signed-off-by: Alec Berg <alecaberg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/273420
Reviewed-by: Todd Broch <tbroch@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
This commit is contained in:
Alec Berg
2015-05-26 18:48:06 -07:00
committed by ChromeOS Commit Bot
parent dc065dcb31
commit 13df9780cb
1 changed files with 6 additions and 7 deletions
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13
common/usb_pd_protocol.c
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@@ -1855,8 +1855,13 @@ void pd_task(void)
typec_set_input_current_limit(
port, typec_curr, TYPE_C_VOLTAGE);
#endif
/*
* fake set data role swapped flag so we send
* discover identity when we enter SRC_READY
*/
pd[port].flags |= PD_FLAGS_CHECK_PR_ROLE |
PD_FLAGS_CHECK_DR_ROLE;
PD_FLAGS_CHECK_DR_ROLE |
PD_FLAGS_DATA_SWAPPED;
set_state(port, PD_STATE_SNK_DISCOVERY);
timeout = 10*MSEC;
hook_call_deferred(
@@ -1917,12 +1922,6 @@ void pd_task(void)
/* Wait for source cap expired only if we are enabled */
if ((pd[port].last_state != pd[port].task_state)
&& pd_comm_enabled) {
/*
* fake set data role swapped flag so we send
* discover identity when we enter SRC_READY
*/
pd[port].flags |= PD_FLAGS_DATA_SWAPPED;
/*
* If we haven't passed hard reset counter,
* start SinkWaitCapTimer, otherwise start