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author | Shawn Nematbakhsh <shawnn@chromium.org> | 2017-02-14 20:58:02 +0100 |
---|---|---|
committer | Benson Leung <bleung@chromium.org> | 2017-06-27 09:19:15 -0700 |
commit | 29d99b966d60029a11d08b9b004cd84b21ce0d67 (patch) | |
tree | 96d561541a90fa53de63670cf27eb6c1726b42ba /drivers/platform/chrome | |
parent | d4da97e59e1004aa1a15dd75469def20cd84ab99 (diff) | |
download | op-kernel-dev-29d99b966d60029a11d08b9b004cd84b21ce0d67.zip op-kernel-dev-29d99b966d60029a11d08b9b004cd84b21ce0d67.tar.gz |
cros_ec: Don't signal wake event for non-wake host events
The subset of wake-enabled host events is defined by the EC, but the EC
may still send non-wake host events if we're in the process of
suspending. Get the mask of wake-enabled host events from the EC and
filter out non-wake events to prevent spurious aborted suspend
attempts.
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Benson Leung <bleung@chromium.org>
Diffstat (limited to 'drivers/platform/chrome')
-rw-r--r-- | drivers/platform/chrome/cros_ec_lpc.c | 3 | ||||
-rw-r--r-- | drivers/platform/chrome/cros_ec_proto.c | 76 |
2 files changed, 73 insertions, 6 deletions
diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c index eeb187e..2b6436d 100644 --- a/drivers/platform/chrome/cros_ec_lpc.c +++ b/drivers/platform/chrome/cros_ec_lpc.c @@ -231,7 +231,8 @@ static void cros_ec_lpc_acpi_notify(acpi_handle device, u32 value, void *data) { struct cros_ec_device *ec_dev = data; - if (ec_dev->mkbp_event_supported && cros_ec_get_next_event(ec_dev) > 0) + if (ec_dev->mkbp_event_supported && + cros_ec_get_next_event(ec_dev, NULL) > 0) blocking_notifier_call_chain(&ec_dev->event_notifier, 0, ec_dev); } diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c index d6942a6..8dfa7fc 100644 --- a/drivers/platform/chrome/cros_ec_proto.c +++ b/drivers/platform/chrome/cros_ec_proto.c @@ -150,6 +150,40 @@ int cros_ec_check_result(struct cros_ec_device *ec_dev, } EXPORT_SYMBOL(cros_ec_check_result); +/* + * cros_ec_get_host_event_wake_mask + * + * Get the mask of host events that cause wake from suspend. + * + * @ec_dev: EC device to call + * @msg: message structure to use + * @mask: result when function returns >=0. + * + * LOCKING: + * the caller has ec_dev->lock mutex, or the caller knows there is + * no other command in progress. + */ +static int cros_ec_get_host_event_wake_mask(struct cros_ec_device *ec_dev, + struct cros_ec_command *msg, + uint32_t *mask) +{ + struct ec_response_host_event_mask *r; + int ret; + + msg->command = EC_CMD_HOST_EVENT_GET_WAKE_MASK; + msg->version = 0; + msg->outsize = 0; + msg->insize = sizeof(*r); + + ret = send_command(ec_dev, msg); + if (ret > 0) { + r = (struct ec_response_host_event_mask *)msg->data; + *mask = r->mask; + } + + return ret; +} + static int cros_ec_host_command_proto_query(struct cros_ec_device *ec_dev, int devidx, struct cros_ec_command *msg) @@ -387,6 +421,15 @@ int cros_ec_query_all(struct cros_ec_device *ec_dev) else ec_dev->mkbp_event_supported = 1; + /* + * Get host event wake mask, assume all events are wake events + * if unavailable. + */ + ret = cros_ec_get_host_event_wake_mask(ec_dev, proto_msg, + &ec_dev->host_event_wake_mask); + if (ret < 0) + ec_dev->host_event_wake_mask = U32_MAX; + ret = 0; exit: @@ -504,12 +547,35 @@ static int get_keyboard_state_event(struct cros_ec_device *ec_dev) return ec_dev->event_size; } -int cros_ec_get_next_event(struct cros_ec_device *ec_dev) +int cros_ec_get_next_event(struct cros_ec_device *ec_dev, bool *wake_event) { - if (ec_dev->mkbp_event_supported) - return get_next_event(ec_dev); - else - return get_keyboard_state_event(ec_dev); + u32 host_event; + int ret; + + if (!ec_dev->mkbp_event_supported) { + ret = get_keyboard_state_event(ec_dev); + if (ret < 0) + return ret; + + if (wake_event) + *wake_event = true; + + return ret; + } + + ret = get_next_event(ec_dev); + if (ret < 0) + return ret; + + if (wake_event) { + host_event = cros_ec_get_host_event(ec_dev); + + /* Consider non-host_event as wake event */ + *wake_event = !host_event || + !!(host_event & ec_dev->host_event_wake_mask); + } + + return ret; } EXPORT_SYMBOL(cros_ec_get_next_event); |