From: Hans de Goede hdegoede@redhat.com
[ Upstream commit 5c54cb6c627e8f50f490e6b5656051a5ac29eab4 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/platform/x86/acer-wmi.c | 109 +++++++++++++++++++++++++++++++- 1 file changed, 106 insertions(+), 3 deletions(-)
diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c index 657fd8c495973..b22df329e97bc 100644 --- a/drivers/platform/x86/acer-wmi.c +++ b/drivers/platform/x86/acer-wmi.c @@ -43,6 +43,7 @@ #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"); @@ -93,7 +94,7 @@ 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 = { @@ -141,7 +142,9 @@ struct event_return_value { u8 function; u8 key_num; u16 device_state; - u32 reserved; + u16 reserved1; + u8 kbd_dock_state; + u8 reserved2; } __attribute__((packed));
/* @@ -225,6 +228,7 @@ 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 @@ -334,6 +338,15 @@ 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 = { };
@@ -512,6 +525,24 @@ 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, + }, {} };
@@ -1552,6 +1583,71 @@ 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 */ @@ -1779,8 +1875,9 @@ 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", @@ -1980,6 +2077,9 @@ 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)) { @@ -1987,6 +2087,9 @@ 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;