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| author | Nicolas Boichat <drinkcat@chromium.org> | 2018-02-01 11:38:29 +0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2018-02-05 19:08:21 -0800 |
| commit | 1af3e5362689497cbc5896cad8e907dd85c7e8ce (patch) | |
| tree | 9daac181b8d5c8b00bdf2c494c24878a67492401 /common | |
| parent | 59fe7c7a5861f95da3d3539a55e3ad019a615517 (diff) | |
| download | chrome-ec-1af3e5362689497cbc5896cad8e907dd85c7e8ce.tar.gz | |
keyboard_scan: Disable when USB is suspended without wake
Keyboard matrix scanning can be disabled when the USB interface is
disabled without setting the remote wake feature
(USB_REQ_FEATURE_DEVICE_REMOTE_WAKEUP), as events would be
ignored anyway.
BRANCH=none
BUG=b:72683995
TEST=keyboard matrix scanning is disabled when lid is closed.
Change-Id: I0b2346cc3426b9ef51127424f9953fd5c20ecd49
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/897068
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Diffstat (limited to 'common')
| -rw-r--r-- | common/keyboard_scan.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/common/keyboard_scan.c b/common/keyboard_scan.c index 23925fc218..34474917b3 100644 --- a/common/keyboard_scan.c +++ b/common/keyboard_scan.c @@ -20,6 +20,7 @@ #include "system.h" #include "task.h" #include "timer.h" +#include "usb_api.h" #include "util.h" /* Console output macros */ @@ -777,6 +778,21 @@ DECLARE_HOOK(HOOK_INIT, keyboard_lid_change, HOOK_PRIO_INIT_LID + 1); #endif +#ifdef CONFIG_USB_SUSPEND +static void keyboard_usb_pm_change(void) +{ + /* + * If USB interface is suspended, and host is not asking us to do remote + * wakeup, we can turn off the key scanning. + */ + if (usb_is_suspended() && !usb_is_remote_wakeup_enabled()) + keyboard_scan_enable(0, KB_SCAN_DISABLE_USB_SUSPENDED); + else + keyboard_scan_enable(1, KB_SCAN_DISABLE_USB_SUSPENDED); +} +DECLARE_HOOK(HOOK_USB_PM_CHANGE, keyboard_usb_pm_change, HOOK_PRIO_DEFAULT); +#endif + /*****************************************************************************/ /* Host commands */ |