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| author | Archana Patni <archana.patni@intel.com> | 2016-11-08 12:45:40 +0530 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2016-11-17 16:09:44 -0800 |
| commit | b8406119c2c51acc46c551ef0930c51153657613 (patch) | |
| tree | 7db348bfbc3affa88c6d452f70e7f349674ac642 /power/common.c | |
| parent | 82aaccad4022737ba4c21cbeb119d73e51dff5f1 (diff) | |
| download | chrome-ec-b8406119c2c51acc46c551ef0930c51153657613.tar.gz | |
Apollolake: Enter/exit from S0ix based on host commands from kernel
This patch changes the entry/exit model for S0ix from a PCH
SLP_S0 signal based model to a hybrid host event/direct interrupt
model. The kernel will send host events on kernel freeze/thaw exit;
EC will initiate the S0ix entry based on host command and exit via
another host command from kernel.
The assertion of SLP_S0 comes later than HC(suspend) and deasserion
of SLP_S0 comes earlier than HC(resume).
________ ________
SLP_S0 |______________________|
_____ ________
HC |___________________________|
BRANCH=none
BUG=chrome-os-partner:58740
TEST=Build/flash EC and check 'echo freeze > /sys/power/state'
command in OS shell. Verify idle state transitions during display off
and periodic wakes from S0ix do not lead to state transitions in EC.
Change-Id: Ie18c6c2ac8998f59141641567d1d740cd72c2d2e
Signed-off-by: Kyoung Kim <kyoung.il.kim@intel.com>
Signed-off-by: Subramony Sesha <subramony.sesha@intel.com>
Signed-off-by: Divagar Mohandass <divagar.mohandass@intel.com>
Signed-off-by: Archana Patni <archana.patni@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/401072
Commit-Ready: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Tested-by: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Reviewed-by: Shawn N <shawnn@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Diffstat (limited to 'power/common.c')
| -rw-r--r-- | power/common.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/power/common.c b/power/common.c index 832e1cc251..c9f58e92db 100644 --- a/power/common.c +++ b/power/common.c @@ -735,6 +735,23 @@ static int host_command_host_sleep_event(struct host_cmd_handler_args *args) const struct ec_params_host_sleep_event *p = args->params; host_sleep_state = p->sleep_event; + +#ifdef CONFIG_POWER_S0IX + if (p->sleep_event == HOST_SLEEP_EVENT_S0IX_SUSPEND) { + CPRINTS("S0ix sus evt"); + task_wake(TASK_ID_CHIPSET); + } else if (p->sleep_event == HOST_SLEEP_EVENT_S0IX_RESUME) { + CPRINTS("S0ix res evt"); + /* + * For all scenarios where lid is not open + * this will be trigerred when other wake + * sources like keyboard, trackpad are used. + */ + if (!chipset_in_state(CHIPSET_STATE_ON)) + task_wake(TASK_ID_CHIPSET); + } +#endif /* CONFIG_POWER_S0IX */ + return EC_RES_SUCCESS; } DECLARE_HOST_COMMAND(EC_CMD_HOST_SLEEP_EVENT, @@ -745,4 +762,12 @@ enum host_sleep_event power_get_host_sleep_state(void) { return host_sleep_state; } + +#ifdef CONFIG_POWER_S0IX +void power_reset_host_sleep_state(enum host_sleep_event sleep_event) +{ + host_sleep_state = sleep_event; +} +#endif /* CONFIG_POWER_S0IX */ + #endif /* CONFIG_POWER_TRACK_HOST_SLEEP_STATE */ |