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platform/x86: acer-wmi: Add support for SW_TABLET_MODE on Switch devices

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Add support for SW_TABLET_MODE on the Acer Switch 10 (SW5-012) and the
acer Switch 10 (S1003) models.

There is no way to detect if this is supported, so this uses DMI based
quirks setting force_caps to ACER_CAP_KBD_DOCK (these devices have no
other acer-wmi based functionality).

The new SW_TABLET_MODE functionality can be tested on devices which
are not in the DMI table by passing acer_wmi.force_caps=0x40 on the
kernel commandline.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20201019185628.264473-6-hdegoede@redhat.com
This commit is contained in:
Hans de Goede 2020-10-19 20:56:28 +02:00
parent 82cb8a5c39
commit 5c54cb6c62
1 changed files with 106 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

109
drivers/platform/x86/acer-wmi.c
View File

@ -30,6 +30,7 @@
#include <linux/input/sparse-keymap.h>
#include <acpi/video.h>
ACPI_MODULE_NAME(KBUILD_MODNAME);
MODULE_AUTHOR("Carlos Corbacho");
MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
MODULE_LICENSE("GPL");
@ -80,7 +81,7 @@ MODULE_ALIAS("wmi:676AA15E-6A47-4D9F-A2CC-1E6D18D14026");
enum acer_wmi_event_ids {
WMID_HOTKEY_EVENT = 0x1,
WMID_ACCEL_EVENT = 0x5,
WMID_ACCEL_OR_KBD_DOCK_EVENT = 0x5,
};
static const struct key_entry acer_wmi_keymap[] __initconst = {
@ -127,7 +128,9 @@ struct event_return_value {
u8 function;
u8 key_num;
u16 device_state;
u32 reserved;
u16 reserved1;
u8 kbd_dock_state;
u8 reserved2;
} __attribute__((packed));
/*
@ -211,6 +214,7 @@ struct hotkey_function_type_aa {
#define ACER_CAP_BRIGHTNESS BIT(3)
#define ACER_CAP_THREEG BIT(4)
#define ACER_CAP_SET_FUNCTION_MODE BIT(5)
#define ACER_CAP_KBD_DOCK BIT(6)
/*
* Interface type flags
@ -316,6 +320,15 @@ static int __init dmi_matched(const struct dmi_system_id *dmi)
return 1;
}
static int __init set_force_caps(const struct dmi_system_id *dmi)
{
if (force_caps == -1) {
force_caps = (uintptr_t)dmi->driver_data;
pr_info("Found %s, set force_caps to 0x%x\n", dmi->ident, force_caps);
}
return 1;
}
static struct quirk_entry quirk_unknown = {
};
@ -494,6 +507,24 @@ static const struct dmi_system_id acer_quirks[] __initconst = {
},
.driver_data = &quirk_acer_travelmate_2490,
},
{
.callback = set_force_caps,
.ident = "Acer Aspire Switch 10 SW5-012",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire SW5-012"),
},
.driver_data = (void *)ACER_CAP_KBD_DOCK,
},
{
.callback = set_force_caps,
.ident = "Acer One 10 (S1003)",
.matches = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "One S1003"),
},
.driver_data = (void *)ACER_CAP_KBD_DOCK,
},
{}
};
@ -1535,6 +1566,71 @@ static int acer_gsensor_event(void)
return 0;
}
/*
* Switch series keyboard dock status
*/
static int acer_kbd_dock_state_to_sw_tablet_mode(u8 kbd_dock_state)
{
switch (kbd_dock_state) {
case 0x01: /* Docked, traditional clamshell laptop mode */
return 0;
case 0x04: /* Stand-alone tablet */
case 0x40: /* Docked, tent mode, keyboard not usable */
return 1;
default:
pr_warn("Unknown kbd_dock_state 0x%02x\n", kbd_dock_state);
}
return 0;
}
static void acer_kbd_dock_get_initial_state(void)
{
u8 *output, input[8] = { 0x05, 0x00, };
struct acpi_buffer input_buf = { sizeof(input), input };
struct acpi_buffer output_buf = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
acpi_status status;
int sw_tablet_mode;
status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input_buf, &output_buf);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "Error getting keyboard-dock initial status"));
return;
}
obj = output_buf.pointer;
if (!obj || obj->type != ACPI_TYPE_BUFFER || obj->buffer.length != 8) {
pr_err("Unexpected output format getting keyboard-dock initial status\n");
goto out_free_obj;
}
output = obj->buffer.pointer;
if (output[0] != 0x00 || (output[3] != 0x05 && output[3] != 0x45)) {
pr_err("Unexpected output [0]=0x%02x [3]=0x%02x getting keyboard-dock initial status\n",
output[0], output[3]);
goto out_free_obj;
}
sw_tablet_mode = acer_kbd_dock_state_to_sw_tablet_mode(output[4]);
input_report_switch(acer_wmi_input_dev, SW_TABLET_MODE, sw_tablet_mode);
out_free_obj:
kfree(obj);
}
static void acer_kbd_dock_event(const struct event_return_value *event)
{
int sw_tablet_mode;
if (!has_cap(ACER_CAP_KBD_DOCK))
return;
sw_tablet_mode = acer_kbd_dock_state_to_sw_tablet_mode(event->kbd_dock_state);
input_report_switch(acer_wmi_input_dev, SW_TABLET_MODE, sw_tablet_mode);
input_sync(acer_wmi_input_dev);
}
/*
* Rfkill devices
*/
@ -1762,8 +1858,9 @@ static void acer_wmi_notify(u32 value, void *context)
sparse_keymap_report_event(acer_wmi_input_dev, scancode, 1, true);
}
break;
case WMID_ACCEL_EVENT:
case WMID_ACCEL_OR_KBD_DOCK_EVENT:
acer_gsensor_event();
acer_kbd_dock_event(&return_value);
break;
default:
pr_warn("Unknown function number - %d - %d\n",
@ -1928,6 +2025,9 @@ static int __init acer_wmi_input_setup(void)
if (err)
goto err_free_dev;
if (has_cap(ACER_CAP_KBD_DOCK))
input_set_capability(acer_wmi_input_dev, EV_SW, SW_TABLET_MODE);
status = wmi_install_notify_handler(ACERWMID_EVENT_GUID,
acer_wmi_notify, NULL);
if (ACPI_FAILURE(status)) {
@ -1935,6 +2035,9 @@ static int __init acer_wmi_input_setup(void)
goto err_free_dev;
}
if (has_cap(ACER_CAP_KBD_DOCK))
acer_kbd_dock_get_initial_state();
err = input_register_device(acer_wmi_input_dev);
if (err)
goto err_uninstall_notifier;