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pd: Fix false USB-C DTS detection

Browse Source 
tcpm_get_cc() returns TYPEC_CC_VOLT_*, not TYPEC_CC_*. Check for RP
rather than non-open to match USB-C spec (Table B-2 Rp/Rp Charging
Current Values for a DTS Source).

BUG=chromium:775542
BRANCH=servo
TEST=Verify donette and guppy are not detected as DTS, verify suzy-qable
is detected as DTS, on kevin DUT.

Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Change-Id: I0ff5550e9171ff86b42b489525044bf63827240c
Reviewed-on: https://chromium-review.googlesource.com/733220
Commit-Ready: Shawn N <shawnn@chromium.org>
Tested-by: Shawn N <shawnn@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
This commit is contained in:
Shawn Nematbakhsh
2017-10-23 08:01:15 -07:00
committed by chrome-bot
parent ca013a9780
commit 8a909ba35d
1 changed files with 1 additions and 1 deletions
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2
common/usb_pd_protocol.c
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@@ -1531,7 +1531,7 @@ static typec_current_t get_typec_current_limit(int polarity, int cc1, int cc2)
else
charge = 0;
if (cc_alt != TYPEC_CC_OPEN)
if (cc_is_rp(cc_alt))
charge |= TYPEC_CURRENT_DTS_MASK;
return charge;