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| author | Ayushee Shah <ayushee.shah@intel.com> | 2021-02-26 13:02:30 -0800 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2021-03-10 02:03:58 +0000 |
| commit | 43fe3569949f74ece62d6a82829355c39a010d65 (patch) | |
| tree | 6e354ed3d13cca1c4569c75697e2ea57f2d8f983 /common/usbc/tbt_alt_mode.c | |
| parent | d3372a419d5e4c78fedb70a125390a005938df10 (diff) | |
| download | chrome-ec-43fe3569949f74ece62d6a82829355c39a010d65.tar.gz | |
USB4: For AP mode entry, add support for active cables
For AP mode entry, request to enter Thunderbolt cable mode
entry prior to entering USB4 mode if -
1. Thunderbolt Mode SOP' VDO active/passive bit (B25) is
TBT_CABLE_ACTIVE or
2. It's an active cable with VDM version < 2.0 or
VDO version < 1.3
BUG=b:181286325
BRANCH=None
TEST=Able to enter USB4 mode with LRD cable
Signed-off-by: Ayushee Shah <ayushee.shah@intel.com>
Change-Id: Ie223fa3d95c2357a0e50aeea93444e6f7639cc3f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2724653
Reviewed-by: Abe Levkoy <alevkoy@chromium.org>
Diffstat (limited to 'common/usbc/tbt_alt_mode.c')
| -rw-r--r-- | common/usbc/tbt_alt_mode.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/common/usbc/tbt_alt_mode.c b/common/usbc/tbt_alt_mode.c index 793de4c778..3ce66f7e5d 100644 --- a/common/usbc/tbt_alt_mode.c +++ b/common/usbc/tbt_alt_mode.c @@ -222,6 +222,37 @@ static void tbt_active_cable_exit_mode(int port) tbt_state[port] = TBT_EXIT_SOP_PRIME; } +bool tbt_cable_entry_required_for_usb4(int port) +{ + struct pd_discovery *disc_sop_prime; + union tbt_mode_resp_cable cable_mode_resp; + + /* Request to enter Thunderbolt mode for the cable prior to entering + * USB4 mode if - + * 1. Thunderbolt Mode SOP' VDO active/passive bit (B25) is + * TBT_CABLE_ACTIVE or + * 2. It's an active cable with VDM version < 2.0 or + * VDO version < 1.3 + */ + if (tbt_cable_entry_is_done(port)) + return false; + + cable_mode_resp.raw_value = + pd_get_tbt_mode_vdo(port, TCPC_TX_SOP_PRIME); + + if (cable_mode_resp.tbt_active_passive == TBT_CABLE_ACTIVE) + return true; + + if (get_usb_pd_cable_type(port) == IDH_PTYPE_ACABLE) { + disc_sop_prime = pd_get_am_discovery(port, TCPC_TX_SOP_PRIME); + if (pd_get_vdo_ver(port, TCPC_TX_SOP_PRIME) < VDM_VER20 || + disc_sop_prime->identity.product_t1.a_rev30.vdo_ver < + VDO_VERSION_1_3) + return true; + } + return false; +} + void intel_vdm_acked(int port, enum tcpm_transmit_type type, int vdo_count, uint32_t *vdm) { |