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platform/x86: system76_acpi: Replace Fn+F2 function for OLED models

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System76 laptops models with OLED displays do not support the default
Fn+F2 behavior of turning the embedded display on and off. Some models
instead introduce a new notify event that is used to lock the screen so
the OS will put the display in a low power state.

Signed-off-by: Jeremy Soller <jeremy@system76.com>
Signed-off-by: Tim Crawford <tcrawford@system76.com>
Link: https://lore.kernel.org/r/20211006202202.7479-3-tcrawford@system76.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Jeremy Soller 2021-10-06 14:22:00 -06:00 committed by Hans de Goede
parent 95563d45b5
commit 0de30fc684
1 changed files with 29 additions and 0 deletions
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29
drivers/platform/x86/system76_acpi.c
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@ -13,6 +13,7 @@
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/module.h>
@ -29,6 +30,7 @@ struct system76_data {
struct device *therm;
union acpi_object *nfan;
union acpi_object *ntmp;
struct input_dev *input;
};
static const struct acpi_device_id device_ids[] = {
@ -463,6 +465,15 @@ static const struct hwmon_chip_info thermal_chip_info = {
.info = thermal_channel_info,
};
static void input_key(struct system76_data *data, unsigned int code)
{
input_report_key(data->input, code, 1);
input_sync(data->input);
input_report_key(data->input, code, 0);
input_sync(data->input);
}
// Handle ACPI notification
static void system76_notify(struct acpi_device *acpi_dev, u32 event)
{
@ -485,6 +496,9 @@ static void system76_notify(struct acpi_device *acpi_dev, u32 event)
case 0x84:
kb_led_hotkey_color(data);
break;
case 0x85:
input_key(data, KEY_SCREENLOCK);
break;
}
}
@ -539,6 +553,20 @@ static int system76_add(struct acpi_device *acpi_dev)
return err;
}
data->input = devm_input_allocate_device(&acpi_dev->dev);
if (!data->input)
return -ENOMEM;
data->input->name = "System76 ACPI Hotkeys";
data->input->phys = "system76_acpi/input0";
data->input->id.bustype = BUS_HOST;
data->input->dev.parent = &acpi_dev->dev;
input_set_capability(data->input, EV_KEY, KEY_SCREENLOCK);
err = input_register_device(data->input);
if (err)
goto error;
err = system76_get_object(data, "NFAN", &data->nfan);
if (err)
goto error;
@ -558,6 +586,7 @@ static int system76_add(struct acpi_device *acpi_dev)
error:
kfree(data->ntmp);
kfree(data->nfan);
input_free_device(data->input);
return err;
}