From: Stephen Boyd swboyd@chromium.org
[ Upstream commit 74bb746407bf0d7c7d126c7731dbcd66d467619b ]
The last resume result exposing logic in cros_ec_sleep_event() incorrectly requires S0ix support, which doesn't work on ARM based systems where S0ix doesn't exist. That's because cros_ec_sleep_event() only reports the last resume result when the EC indicates the last sleep event was an S0ix resume. On ARM systems, the last sleep event is always S3 resume, but the EC can still detect sleep hang events in case some other part of the AP is blocking sleep.
Always expose the last resume result if the EC supports it so that this works on all devices regardless of S0ix support. This fixes sleep hang detection on ARM based chromebooks like Trogdor.
Cc: Rajat Jain rajatja@chromium.org Cc: Matthias Kaehlcke mka@chromium.org Cc: Hsin-Yi Wang hsinyi@chromium.org Cc: Tzung-Bi Shih tzungbi@kernel.org Reviewed-by: Guenter Roeck groeck@chromium.org Reviewed-by: Evan Green evgreen@chromium.org Fixes: 7235560ac77a ("platform/chrome: Add support for v1 of host sleep event") Signed-off-by: Stephen Boyd swboyd@chromium.org Signed-off-by: Tzung-Bi Shih tzungbi@kernel.org Link: https://lore.kernel.org/r/20220614075726.2729987-1-swboyd@chromium.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/platform/chrome/cros_ec.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/platform/chrome/cros_ec.c b/drivers/platform/chrome/cros_ec.c index 979f92194e81..c4de8c4db193 100644 --- a/drivers/platform/chrome/cros_ec.c +++ b/drivers/platform/chrome/cros_ec.c @@ -121,16 +121,16 @@ static int cros_ec_sleep_event(struct cros_ec_device *ec_dev, u8 sleep_event) buf.msg.command = EC_CMD_HOST_SLEEP_EVENT;
ret = cros_ec_cmd_xfer_status(ec_dev, &buf.msg); - - /* For now, report failure to transition to S0ix with a warning. */ + /* Report failure to transition to system wide suspend with a warning. */ if (ret >= 0 && ec_dev->host_sleep_v1 && - (sleep_event == HOST_SLEEP_EVENT_S0IX_RESUME)) { + (sleep_event == HOST_SLEEP_EVENT_S0IX_RESUME || + sleep_event == HOST_SLEEP_EVENT_S3_RESUME)) { ec_dev->last_resume_result = buf.u.resp1.resume_response.sleep_transitions;
WARN_ONCE(buf.u.resp1.resume_response.sleep_transitions & EC_HOST_RESUME_SLEEP_TIMEOUT, - "EC detected sleep transition timeout. Total slp_s0 transitions: %d", + "EC detected sleep transition timeout. Total sleep transitions: %d", buf.u.resp1.resume_response.sleep_transitions & EC_HOST_RESUME_SLEEP_TRANSITIONS_MASK); }