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| author | Keith Short <keithshort@chromium.org> | 2020-08-27 14:51:41 -0600 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2020-09-02 03:20:23 +0000 |
| commit | c069177ccc29b4373d5587e1dcea966aeee0a856 (patch) | |
| tree | 84f6a1b6e046b0c2aab859a992a7366c5fb29c8c /include/usb_pd_tcpm.h | |
| parent | 6b7a3e349d4d55c3a5a40bfa6094e415a5a4d8c3 (diff) | |
| download | chrome-ec-c069177ccc29b4373d5587e1dcea966aeee0a856.tar.gz | |
tcpmv2: disable receive of SOP' during VCONN swap
The USB PD specification indicates that the initial VCONN source shall
cease source VCONN within tVCONNSourceOff (25 ms) after receiving
PS_RDY. Not all partners wait after sending PS_RDY before trying to
communicate with the cable.
BUG=b:163478172, b:163143427
BRANCH=none
TEST=make buildall
TEST=Connect 2 Volteers together and force VCONN swaps confirming the
sequence completes normally.
Signed-off-by: Keith Short <keithshort@chromium.org>
Change-Id: I14720f033c5f6e9caed9c4fe3bfa11e5c046116e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2381030
Reviewed-by: Denis Brockus <dbrockus@chromium.org>
Commit-Queue: Denis Brockus <dbrockus@chromium.org>
Diffstat (limited to 'include/usb_pd_tcpm.h')
| -rw-r--r-- | include/usb_pd_tcpm.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/usb_pd_tcpm.h b/include/usb_pd_tcpm.h index bccea184e4..d6f89553fc 100644 --- a/include/usb_pd_tcpm.h +++ b/include/usb_pd_tcpm.h @@ -245,6 +245,19 @@ struct tcpm_drv { */ int (*set_polarity)(int port, enum tcpc_cc_polarity polarity); +#ifdef CONFIG_USB_PD_DECODE_SOP + /** + * Disable receive of SOP' and SOP'' messages. This is provided + * separately from set_vconn so that we can preemptively disable + * receipt of SOP' messages during a VCONN swap. + * + * @param port Type-C port number + * + * @return EC_SUCCESS or error + */ + int (*sop_prime_disable)(int port); +#endif + /** * Set Vconn. * |