diff options
| author | Enrico Granata <egranata@chromium.org> | 2019-11-19 13:45:46 +0100 |
|---|---|---|
| committer | Enric Balletbo i Serra <enric.balletbo@collabora.com> | 2019-11-21 11:23:15 +0100 |
| commit | 3300fdd630d4d3d96e3ba9af63a740d3a4e8fc61 (patch) | |
| tree | 0617fb327f67158998b05dd3b9c604ff96ddb273 /drivers/platform/chrome/cros_ec_ishtp.c | |
| parent | da946589b1b9b643c538e6c977ac0f963362ee3c (diff) | |
| download | linux-3300fdd630d4d3d96e3ba9af63a740d3a4e8fc61.tar.bz2 | |
platform/chrome: cros_ec: handle MKBP more events flag
The ChromeOS EC has support for signaling to the host that a single IRQ
can serve multiple MKBP (Matrix KeyBoard Protocol) events.
Doing this serves an optimization purpose, as it minimizes the number of
round-trips into the interrupt handling machinery, and it proves
beneficial to sensor timestamping as it keeps the desired synchronization
of event times between the two processors.
This patch adds kernel support for this EC feature, allowing the ec_irq
to loop until all events have been served.
Signed-off-by: Enrico Granata <egranata@chromium.org>
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Diffstat (limited to 'drivers/platform/chrome/cros_ec_ishtp.c')
| -rw-r--r-- | drivers/platform/chrome/cros_ec_ishtp.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/platform/chrome/cros_ec_ishtp.c b/drivers/platform/chrome/cros_ec_ishtp.c index 5c848f22b44b..e5996821d08b 100644 --- a/drivers/platform/chrome/cros_ec_ishtp.c +++ b/drivers/platform/chrome/cros_ec_ishtp.c @@ -136,11 +136,11 @@ static void ish_evt_handler(struct work_struct *work) struct ishtp_cl_data *client_data = container_of(work, struct ishtp_cl_data, work_ec_evt); struct cros_ec_device *ec_dev = client_data->ec_dev; + bool ec_has_more_events; - if (cros_ec_get_next_event(ec_dev, NULL) > 0) { - blocking_notifier_call_chain(&ec_dev->event_notifier, - 0, ec_dev); - } + do { + ec_has_more_events = cros_ec_handle_event(ec_dev); + } while (ec_has_more_events); } /** |