platform/x86: intel-vbtn: match power button on press rather than release

This fixes a problem where the system gets stuck in a loop
unable to wakeup via power button in s2idle.

The problem happens because:
- press power button:
- system emits 0xc0 (power press), event ignored
- system emits 0xc1 (power release), event processed,
emited as KEY_POWER
- set wakeup_mode to true
- system goes to s2idle
- press power button
- system emits 0xc0 (power press), wakeup_mode is true,
system wakes
- system emits 0xc1 (power release), event processed,
emited as KEY_POWER
- system goes to s2idle again

To avoid this situation, process the presses (which matches what
intel-hid does too).

Verified on an Dell XPS 9365

Signed-off-by: Mario Limonciello <[e-mail]>
Acked-by: Rafael J. Wysocki <[e-mail]>
Signed-off-by: Darren Hart (VMware) <[e-mail]>

drivers/platform/x86/intel-vbtn.c

···
 
 /* In theory, these are HID usages. */
 static const struct key_entry intel_vbtn_keymap[] = {
-	{ KE_IGNORE, 0xC0, { KEY_POWER } },	/* power key press */
-	{ KE_KEY, 0xC1, { KEY_POWER } },	/* power key release */
+	{ KE_KEY, 0xC0, { KEY_POWER } },	/* power key press */
+	{ KE_IGNORE, 0xC1, { KEY_POWER } },	/* power key release */
 	{ KE_KEY, 0xC4, { KEY_VOLUMEUP } },		/* volume-up key press */
 	{ KE_IGNORE, 0xC5, { KEY_VOLUMEUP } },		/* volume-up key release */
 	{ KE_KEY, 0xC6, { KEY_VOLUMEDOWN } },		/* volume-down key press */