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msi-wmi: Make keys and backlight independent

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Introduced function msi_wmi_backlight_setup() that initializes backlight
device. Made driver load and work if only one WMI (only for hotkeys or
only for backlight) is present.

Signed-off-by: Maxim Mikityanskiy <maxtram95@gmail.com>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
This commit is contained in:
Maxim Mikityanskiy 2012-12-15 19:31:34 +02:00 committed by Matthew Garrett
parent b0d3bb53be
commit da8506288f
1 changed files with 65 additions and 38 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

103
drivers/platform/x86/msi-wmi.c
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@ -60,6 +60,8 @@ static struct key_entry msi_wmi_keymap[] = {
};
static ktime_t last_pressed[ARRAY_SIZE(msi_wmi_keymap) - 1];
static const char *event_wmi_guid;
static struct backlight_device *backlight;
static int backlight_map[] = { 0x00, 0x33, 0x66, 0x99, 0xCC, 0xFF };
@ -184,7 +186,7 @@ static void msi_wmi_notify(u32 value, void *context)
if (key->type == KE_KEY &&
/* Brightness is served via acpi video driver */
(!acpi_video_backlight_support() ||
(backlight ||
(key->code != MSI_KEY_BRIGHTNESSUP &&
key->code != MSI_KEY_BRIGHTNESSDOWN))) {
pr_debug("Send key: 0x%X - "
@ -202,6 +204,31 @@ msi_wmi_notify_exit:
kfree(response.pointer);
}
static int __init msi_wmi_backlight_setup(void)
{
int err;
struct backlight_properties props;
memset(&props, 0, sizeof(struct backlight_properties));
props.type = BACKLIGHT_PLATFORM;
props.max_brightness = ARRAY_SIZE(backlight_map) - 1;
backlight = backlight_device_register(DRV_NAME, NULL, NULL,
&msi_backlight_ops,
&props);
if (IS_ERR(backlight))
return PTR_ERR(backlight);
err = bl_get(NULL);
if (err < 0) {
backlight_device_unregister(backlight);
return err;
}
backlight->props.brightness = err;
return 0;
}
static int __init msi_wmi_input_setup(void)
{
int err;
@ -238,60 +265,60 @@ static int __init msi_wmi_init(void)
{
int err;
if (!wmi_has_guid(MSIWMI_EVENT_GUID)) {
pr_err("This machine doesn't have MSI-hotkeys through WMI\n");
return -ENODEV;
}
err = wmi_install_notify_handler(MSIWMI_EVENT_GUID,
if (wmi_has_guid(MSIWMI_EVENT_GUID)) {
err = msi_wmi_input_setup();
if (err) {
pr_err("Unable to setup input device\n");
return err;
}
err = wmi_install_notify_handler(MSIWMI_EVENT_GUID,
msi_wmi_notify, NULL);
if (ACPI_FAILURE(err))
return -EINVAL;
err = msi_wmi_input_setup();
if (err)
goto err_uninstall_notifier;
if (!acpi_video_backlight_support()) {
struct backlight_properties props;
memset(&props, 0, sizeof(struct backlight_properties));
props.type = BACKLIGHT_PLATFORM;
props.max_brightness = ARRAY_SIZE(backlight_map) - 1;
backlight = backlight_device_register(DRV_NAME, NULL, NULL,
&msi_backlight_ops,
&props);
if (IS_ERR(backlight)) {
err = PTR_ERR(backlight);
if (ACPI_FAILURE(err)) {
pr_err("Unable to setup WMI notify handler\n");
goto err_free_input;
}
err = bl_get(NULL);
if (err < 0)
goto err_free_backlight;
backlight->props.brightness = err;
pr_debug("Event handler installed\n");
event_wmi_guid = MSIWMI_EVENT_GUID;
}
if (wmi_has_guid(MSIWMI_BIOS_GUID) && !acpi_video_backlight_support()) {
err = msi_wmi_backlight_setup();
if (err) {
pr_err("Unable to setup backlight device\n");
goto err_uninstall_handler;
}
pr_debug("Backlight device created\n");
}
if (!event_wmi_guid && !backlight) {
pr_err("This machine doesn't have neither MSI-hotkeys nor backlight through WMI\n");
return -ENODEV;
}
pr_debug("Event handler installed\n");
return 0;
err_free_backlight:
backlight_device_unregister(backlight);
err_uninstall_handler:
if (event_wmi_guid)
wmi_remove_notify_handler(event_wmi_guid);
err_free_input:
sparse_keymap_free(msi_wmi_input_dev);
input_unregister_device(msi_wmi_input_dev);
err_uninstall_notifier:
wmi_remove_notify_handler(MSIWMI_EVENT_GUID);
if (event_wmi_guid) {
sparse_keymap_free(msi_wmi_input_dev);
input_unregister_device(msi_wmi_input_dev);
}
return err;
}
static void __exit msi_wmi_exit(void)
{
if (wmi_has_guid(MSIWMI_EVENT_GUID)) {
wmi_remove_notify_handler(MSIWMI_EVENT_GUID);
if (event_wmi_guid) {
wmi_remove_notify_handler(event_wmi_guid);
sparse_keymap_free(msi_wmi_input_dev);
input_unregister_device(msi_wmi_input_dev);
backlight_device_unregister(backlight);
}
if (backlight)
backlight_device_unregister(backlight);
}
module_init(msi_wmi_init);