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Commit b253c9d1 authored by Matthew Garrett's avatar Matthew Garrett
Browse files

hp-wmi: Enable hotkeys on some systems 



Kyle Evans discovered that he needed to set some bits in an EC register in
order to receive hotkey events. Doing so blindly broke some otherwise
working HP laptops. It turns out that there's a WMI call that accesses
the same register, so let's try calling that instead.

Signed-off-by: default avatarMatthew Garrett <matthew.garrett@nebula.com>
Cc: Kyle Evans <kvans32@gmail.com>
parent d2b4a646

drivers/platform/x86/hp-wmi.c

+16 −0
Original line number Diff line number Diff line
@@ -53,6 +53,7 @@ MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4"); 
#define HPWMI_ALS_QUERY 0x3

#define HPWMI_HARDWARE_QUERY 0x4

#define HPWMI_WIRELESS_QUERY 0x5

#define HPWMI_BIOS_QUERY 0x9

#define HPWMI_HOTKEY_QUERY 0xc

#define HPWMI_WIRELESS2_QUERY 0x1b
@@ -291,6 +292,19 @@ static int hp_wmi_tablet_state(void) 
	return (state & 0x4) ? 1 : 0;

}



static int hp_wmi_enable_hotkeys(void)

{

	int ret;

	int query = 0x6e;



	ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, 1, &query, sizeof(query),

				   0);



	if (ret)

		return -EINVAL;

	return 0;

}



static int hp_wmi_set_block(void *data, bool blocked)

{

	enum hp_wmi_radio r = (enum hp_wmi_radio) data;
@@ -948,6 +962,8 @@ static int __init hp_wmi_init(void) 
		err = hp_wmi_input_setup();

		if (err)

			return err;



		hp_wmi_enable_hotkeys();

	}



	if (bios_capable) {