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authorEvan Green <evgreen@chromium.org>2019-04-03 14:34:28 -0700
committerLee Jones <lee.jones@linaro.org>2019-05-14 08:13:27 +0100
commit7235560ac77a2516b84b86946debaa4fb951ed9b (patch)
treeb0dd3de2e289e8b8b9ed6bc0ce376177b9cc36d9
parentafe2bb5c4b6227a347be60c70df2890c3f57553d (diff)
platform/chrome: Add support for v1 of host sleep event
Add support in code for the new forms of the host sleep event. Detects the presence of this version of the command at runtime, and use whichever form the EC supports. At this time, always request the default timeout, and only report the failing response via a WARN_ONCE(). Future versions could accept the sleep parameter from outside the driver, and return the response information to usermode or elsewhere. Signed-off-by: Evan Green <evgreen@chromium.org> Reviewed-by: Rajat Jain <rajatja@chromium.org> Reviewed-by: Guenter Roeck <groeck@chromium.org> Acked-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
-rw-r--r--drivers/mfd/cros_ec.c39
-rw-r--r--drivers/platform/chrome/cros_ec_proto.c6
-rw-r--r--include/linux/mfd/cros_ec.h2
3 files changed, 42 insertions, 5 deletions
diff --git a/drivers/mfd/cros_ec.c b/drivers/mfd/cros_ec.c
index 6acfe036d522..bd2bcdd4718b 100644
--- a/drivers/mfd/cros_ec.c
+++ b/drivers/mfd/cros_ec.c
@@ -75,20 +75,49 @@ static irqreturn_t ec_irq_thread(int irq, void *data)
static int cros_ec_sleep_event(struct cros_ec_device *ec_dev, u8 sleep_event)
{
+ int ret;
struct {
struct cros_ec_command msg;
- struct ec_params_host_sleep_event req;
+ union {
+ struct ec_params_host_sleep_event req0;
+ struct ec_params_host_sleep_event_v1 req1;
+ struct ec_response_host_sleep_event_v1 resp1;
+ } u;
} __packed buf;
memset(&buf, 0, sizeof(buf));
- buf.req.sleep_event = sleep_event;
+ if (ec_dev->host_sleep_v1) {
+ buf.u.req1.sleep_event = sleep_event;
+ buf.u.req1.suspend_params.sleep_timeout_ms =
+ EC_HOST_SLEEP_TIMEOUT_DEFAULT;
+
+ buf.msg.outsize = sizeof(buf.u.req1);
+ if ((sleep_event == HOST_SLEEP_EVENT_S3_RESUME) ||
+ (sleep_event == HOST_SLEEP_EVENT_S0IX_RESUME))
+ buf.msg.insize = sizeof(buf.u.resp1);
+
+ buf.msg.version = 1;
+
+ } else {
+ buf.u.req0.sleep_event = sleep_event;
+ buf.msg.outsize = sizeof(buf.u.req0);
+ }
buf.msg.command = EC_CMD_HOST_SLEEP_EVENT;
- buf.msg.version = 0;
- buf.msg.outsize = sizeof(buf.req);
- return cros_ec_cmd_xfer(ec_dev, &buf.msg);
+ ret = cros_ec_cmd_xfer(ec_dev, &buf.msg);
+
+ /* For now, report failure to transition to S0ix with a warning. */
+ if (ret >= 0 && ec_dev->host_sleep_v1 &&
+ (sleep_event == HOST_SLEEP_EVENT_S0IX_RESUME))
+ WARN_ONCE(buf.u.resp1.resume_response.sleep_transitions &
+ EC_HOST_RESUME_SLEEP_TIMEOUT,
+ "EC detected sleep transition timeout. Total slp_s0 transitions: %d",
+ buf.u.resp1.resume_response.sleep_transitions &
+ EC_HOST_RESUME_SLEEP_TRANSITIONS_MASK);
+
+ return ret;
}
int cros_ec_register(struct cros_ec_device *ec_dev)
diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
index 97a068dff192..52ca564a64e7 100644
--- a/drivers/platform/chrome/cros_ec_proto.c
+++ b/drivers/platform/chrome/cros_ec_proto.c
@@ -414,6 +414,12 @@ int cros_ec_query_all(struct cros_ec_device *ec_dev)
else
ec_dev->mkbp_event_supported = 1;
+ /* Probe if host sleep v1 is supported for S0ix failure detection. */
+ ret = cros_ec_get_host_command_version_mask(ec_dev,
+ EC_CMD_HOST_SLEEP_EVENT,
+ &ver_mask);
+ ec_dev->host_sleep_v1 = (ret >= 0 && (ver_mask & EC_VER_MASK(1)));
+
/*
* Get host event wake mask, assume all events are wake events
* if unavailable.
diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h
index 109292a60499..31c88a0070a3 100644
--- a/include/linux/mfd/cros_ec.h
+++ b/include/linux/mfd/cros_ec.h
@@ -121,6 +121,7 @@ struct cros_ec_command {
* @pkt_xfer: Send packet to EC and get response.
* @lock: One transaction at a time.
* @mkbp_event_supported: True if this EC supports the MKBP event protocol.
+ * @host_sleep_v1: True if this EC supports the sleep v1 command.
* @event_notifier: Interrupt event notifier for transport devices.
* @event_data: Raw payload transferred with the MKBP event.
* @event_size: Size in bytes of the event data.
@@ -154,6 +155,7 @@ struct cros_ec_device {
struct cros_ec_command *msg);
struct mutex lock;
bool mkbp_event_supported;
+ bool host_sleep_v1;
struct blocking_notifier_head event_notifier;
struct ec_response_get_next_event_v1 event_data;