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| author | Ayushee Shah <ayushee.shah@intel.com> | 2020-12-09 16:15:08 -0800 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2020-12-16 21:12:30 +0000 |
| commit | 397999bf301d88e04d65a9c2c1bbee1c074405a5 (patch) | |
| tree | 4367fcaf20c7a6914d19c63c848b74c28138e3be /common/usb_pd_policy.c | |
| parent | 13975210ee624e3cfec2802d83fde06f7834cf2d (diff) | |
| download | chrome-ec-397999bf301d88e04d65a9c2c1bbee1c074405a5.tar.gz | |
TBT: Enter Thunderbolt mode if the cable response timesout
If the passive superspeed cable doesn't support Intel SVID, then the
Thunderbolt cable speed should be set to Passive Gen 2 cable.
Ref: USB Type-C Cable and Connector Specification, Fig F-1.
This commit, checks if the cable is superspeed before returning the
thunderbolt cable speed and sets the overridable maximum speed
supported by the board to TBT_SS_TBT_GEN3.
BUG=b:172364575
BRANCH=None
TEST=Tested on Voxel, able to enter Thunderbolt mode if the cable fails
to respond to Discover SVID SOP'
Signed-off-by: Ayushee Shah <ayushee.shah@intel.com>
Change-Id: Ib5137670c08cbe17166f5a90241ddbcb77e059f7
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2582988
Reviewed-by: Keith Short <keithshort@chromium.org>
Diffstat (limited to 'common/usb_pd_policy.c')
| -rw-r--r-- | common/usb_pd_policy.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/common/usb_pd_policy.c b/common/usb_pd_policy.c index 5ad4188e54..b480981a2d 100644 --- a/common/usb_pd_policy.c +++ b/common/usb_pd_policy.c @@ -487,7 +487,8 @@ static int process_am_discover_ident_sop_prime(int port, int cnt, * Disable Thunderbolt-compatible mode if the cable does not support * superspeed. */ - if (is_tbt_compat_enabled(port) && !is_tbt_cable_superspeed(port)) + if (is_tbt_compat_enabled(port) && + get_tbt_cable_speed(port) < TBT_SS_U31_GEN1) disable_tbt_compat_mode(port); return dfp_discover_svids(payload); |