diff options
| author | Todd Broch <tbroch@chromium.org> | 2014-10-13 15:45:50 -0700 |
|---|---|---|
| committer | chrome-internal-fetch <chrome-internal-fetch@google.com> | 2014-10-30 21:48:06 +0000 |
| commit | a3913d99d7a40062144b96d505bba56a62986faa (patch) | |
| tree | 35b6531d59c0889a36d77253faa30bfa1ea86b4e /board/dingdong/usb_pd_policy.c | |
| parent | d4f3279db9d31159624449828362e45062bd7703 (diff) | |
| download | chrome-ec-a3913d99d7a40062144b96d505bba56a62986faa.tar.gz | |
pd: dingdong/hoho: HPD over USB PD.
HPD needs to be transported of USB PD as both SBU lines are consumed
for differential AUX signalling.
This CL does the following:
1. Enables GPIO DP_HPD as interrupt
2. Sends debounced HPD across CC via the SVDM DP status message
BRANCH=none
BUG=chrome-os-partner:31192,chrome-os-partner:31193
TEST=manual,
From servo w/ GPIO attached to HPD drove the following transactions
after inserting with HPD low initially:
# e1: hpd_high
# e2: hpd_low
# non-registered glitch
# e3: hpd_high followed by hpd_low
# e4: hpd high
# non-registered glitch
# e5: hpd_irq
# e6: hpd_irq
# e7: hpd_irq
# e8: hpd_low followed by hpd_high
From fruitpie console (marked up to show result of above)
----> enter-mode, dp status, dp config
[6.774108 DONE] SVDM/1 [4] ff018144
[6.777467 DONE] SVDM/2 [16] ff018150 00000002
[6.780637 DONE] SVDM/1 [17] ff018051
----> attentions start arriving
----> e1 [18.966741 DONE] SVDM/2 [6] ff018106 0000008a
----> e2 [33.724367 DONE] SVDM/2 [6] ff018106 0000000a
----> e3 [64.550398 DONE] SVDM/2 [6] ff018106 0000008a
----> e3 [64.752452 DONE] SVDM/2 [6] ff018106 0000000a
----> e4 [74.247127 DONE] SVDM/2 [6] ff018106 0000008a
----> e5 [88.906254 DONE] SVDM/2 [6] ff018106 0000010a
----> e6 [100.938738 DONE] SVDM/2 [6] ff018106 0000010a
----> e7 [123.693414 DONE] SVDM/2 [6] ff018106 0000010a
----> e8 [130.050074 DONE] SVDM/2 [6] ff018106 0000000a
----> e8 [130.254087 DONE] SVDM/2 [6] ff018106 0000008a
Change-Id: I976c268467ece84cedab7ba4943fb59d1e48c113
Signed-off-by: Todd Broch <tbroch@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/223262
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Diffstat (limited to 'board/dingdong/usb_pd_policy.c')
| -rw-r--r-- | board/dingdong/usb_pd_policy.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/board/dingdong/usb_pd_policy.c b/board/dingdong/usb_pd_policy.c index 97504a1cbf..10b5ab48e1 100644 --- a/board/dingdong/usb_pd_policy.c +++ b/board/dingdong/usb_pd_policy.c @@ -32,6 +32,9 @@ const int pd_snk_pdo_cnt = ARRAY_SIZE(pd_snk_pdo); /* Desired voltage requested as a sink (in millivolts) */ static unsigned select_mv = 5000; +/* Whether alternate mode has been entered or not */ +static int alt_mode; + int pd_choose_voltage(int cnt, uint32_t *src_caps, uint32_t *rdo, uint32_t *curr_limit, uint32_t *supply_voltage) { @@ -183,12 +186,20 @@ static int svdm_enter_mode(int port, uint32_t *payload) if ((PD_VDO_VID(payload[0]) != USB_SID_DISPLAYPORT) || (PD_VDO_OPOS(payload[0]) != OPOS)) return 0; /* will generate NAK */ + + alt_mode = OPOS; return 1; } +int pd_alt_mode(int port) +{ + return alt_mode; +} + static int svdm_exit_mode(int port, uint32_t *payload) { gpio_set_level(GPIO_PD_SBU_ENABLE, 0); + alt_mode = 0; return 1; /* Must return ACK */ } |