[PATCH v5 2/6] platform/x86: bitland-mifs-wmi: Merge the function of redmi-wmi into the bitland driver
From: Mingyou Chen
Date: Sun Aug 16 2026 - 06:09:15 EST
The bitland-mifs-wmi and legacy redmi-wmi drivers both attempt to bind
to the same WMI GUID (46C93E13-EE9B-4262-8488-563BCA757FEF). This
overlap causes a device registration conflict, preventing one of the
drivers from loading properly depending on the module initialization
order.
Merge the event handling logic from redmi-wmi into bitland-mifs-wmi. By
handling both device layouts within a single driver, we eliminate the
GUID ownership conflict.
Tested-by: Nika Krasnova <nika@xxxxxxxxxxxx>
Signed-off-by: Mingyou Chen <qby140326@xxxxxxxxx>
---
drivers/platform/x86/bitland-mifs-wmi.c | 139 ++++++++++++++++--------
1 file changed, 96 insertions(+), 43 deletions(-)
diff --git a/drivers/platform/x86/bitland-mifs-wmi.c b/drivers/platform/x86/bitland-mifs-wmi.c
index b0d06a80e89e..8b6476881de6 100644
--- a/drivers/platform/x86/bitland-mifs-wmi.c
+++ b/drivers/platform/x86/bitland-mifs-wmi.c
@@ -34,6 +34,11 @@
#include <linux/units.h>
#include <linux/wmi.h>
+#define BI_HOTKEY_CODE(id, low, high) \
+ (((u32)(high) << 24) | ((u32)(low) << 16) | ((u32)(id) << 8) | WMI_EVENT_TYPE_HOTKEY)
+
+#define AI_KEY_VALUE_MASK BIT(8)
+
#define DRV_NAME "bitland-mifs-wmi"
#define BITLAND_MIFS_GUID "B60BFB48-3E5B-49E4-A0E9-8CFFE1B3434B"
#define BITLAND_EVENT_GUID "46C93E13-EE9B-4262-8488-563BCA757FEF"
@@ -601,18 +606,59 @@ static const struct attribute *const laptop_attrs[] = {
ATTRIBUTE_GROUPS(laptop);
static const struct key_entry bitland_mifs_wmi_keymap[] = {
- { KE_KEY, WMI_EVENT_OPEN_APP, { KEY_PROG1 } },
- { KE_KEY, WMI_EVENT_CALCULATOR_START, { KEY_CALC } },
- { KE_KEY, WMI_EVENT_BROWSER_START, { KEY_WWW } },
- { KE_IGNORE, WMI_EVENT_FN_J, { KEY_RESERVED } },
- { KE_IGNORE, WMI_EVENT_FN_F, { KEY_RESERVED } },
- { KE_IGNORE, WMI_EVENT_FN_0, { KEY_RESERVED } },
- { KE_IGNORE, WMI_EVENT_FN_1, { KEY_RESERVED } },
- { KE_IGNORE, WMI_EVENT_FN_2, { KEY_RESERVED } },
- { KE_IGNORE, WMI_EVENT_FN_3, { KEY_RESERVED } },
- { KE_IGNORE, WMI_EVENT_FN_4, { KEY_RESERVED } },
- { KE_IGNORE, WMI_EVENT_FN_5, { KEY_RESERVED } },
- { KE_END, 0 }
+ { KE_KEY, BI_HOTKEY_CODE(WMI_EVENT_OPEN_APP, 1, 0), { KEY_PROG1 } },
+
+ { KE_KEY, BI_HOTKEY_CODE(WMI_EVENT_CALCULATOR_START, 1, 0), { KEY_CALC } },
+
+ { KE_KEY, BI_HOTKEY_CODE(WMI_EVENT_BROWSER_START, 1, 0), { KEY_WWW } },
+
+ { KE_IGNORE, BI_HOTKEY_CODE(WMI_EVENT_FN_J, 0, 0), {} },
+ { KE_IGNORE, BI_HOTKEY_CODE(WMI_EVENT_FN_F, 0, 0), {} },
+ { KE_IGNORE, BI_HOTKEY_CODE(WMI_EVENT_FN_0, 0, 0), {} },
+ { KE_IGNORE, BI_HOTKEY_CODE(WMI_EVENT_FN_1, 0, 0), {} },
+ { KE_IGNORE, BI_HOTKEY_CODE(WMI_EVENT_FN_2, 0, 0), {} },
+ { KE_IGNORE, BI_HOTKEY_CODE(WMI_EVENT_FN_3, 0, 0), {} },
+ { KE_IGNORE, BI_HOTKEY_CODE(WMI_EVENT_FN_4, 0, 0), {} },
+ { KE_IGNORE, BI_HOTKEY_CODE(WMI_EVENT_FN_5, 0, 0), {} },
+
+ { KE_KEY, BI_HOTKEY_CODE(WMI_EVENT_RESERVED_2, 0, 0), { KEY_SELECTIVE_SCREENSHOT } },
+ { KE_KEY, BI_HOTKEY_CODE(WMI_EVENT_RESERVED_3, 0, 0), { KEY_ALL_APPLICATIONS } },
+ { KE_KEY, BI_HOTKEY_CODE(0x1b, 0, 0), { KEY_CONFIG } },
+ { KE_KEY, BI_HOTKEY_CODE(0x1b, 1, 0), { KEY_CONFIG } },
+ { KE_KEY, BI_HOTKEY_CODE(WMI_EVENT_RESERVED_1, 1, 0), { KEY_SWITCHVIDEOMODE } },
+ { KE_KEY, BI_HOTKEY_CODE(WMI_EVENT_REFRESH_RATE, 0, 0), { KEY_REFRESH_RATE_TOGGLE } },
+
+ /* AI button has code for each position */
+ { KE_KEY, BI_HOTKEY_CODE(WMI_EVENT_FN_5, 1, 0), { KEY_ASSISTANT } },
+
+ { KE_KEY, BI_HOTKEY_CODE(0x19, 1, 0), { KEY_ASSISTANT } },
+
+ { KE_IGNORE, BI_HOTKEY_CODE(WMI_EVENT_KBD_BRIGHTNESS, 0, 0), {} },
+ { KE_IGNORE, BI_HOTKEY_CODE(WMI_EVENT_KBD_BRIGHTNESS, 0, 0x80), {} },
+ { KE_IGNORE, BI_HOTKEY_CODE(WMI_EVENT_KBD_BRIGHTNESS, 5, 0), {} },
+ { KE_IGNORE, BI_HOTKEY_CODE(WMI_EVENT_KBD_BRIGHTNESS, 0x0a, 0), {} },
+
+ /* Xiaomi G Command Center */
+ { KE_KEY, BI_HOTKEY_CODE(0x0a, 1, 0), { KEY_VENDOR } },
+
+ /* OEM preset power mode */
+ { KE_IGNORE, BI_HOTKEY_CODE(0x16, 1, 0), {} },
+ { KE_IGNORE, BI_HOTKEY_CODE(0x16, 2, 0), {} },
+ { KE_IGNORE, BI_HOTKEY_CODE(0x16, 3, 0), {} },
+ { KE_IGNORE, BI_HOTKEY_CODE(0x16, 4, 0), {} },
+
+ /* Fn Lock state */
+ { KE_IGNORE, BI_HOTKEY_CODE(WMI_EVENT_FNLOCK_STATE, 0, 0), {} },
+ { KE_IGNORE, BI_HOTKEY_CODE(WMI_EVENT_FNLOCK_STATE, 1, 0), {} },
+
+ /* Fn+`/1/2/3/4 */
+ { KE_KEY, BI_HOTKEY_CODE(WMI_EVENT_FN_F, 1, 0), { KEY_F13 } },
+ { KE_KEY, BI_HOTKEY_CODE(WMI_EVENT_FN_0, 1, 0), { KEY_F14 } },
+ { KE_KEY, BI_HOTKEY_CODE(WMI_EVENT_FN_1, 1, 0), { KEY_F15 } },
+ { KE_KEY, BI_HOTKEY_CODE(WMI_EVENT_FN_2, 1, 0), { KEY_F16 } },
+ { KE_KEY, BI_HOTKEY_CODE(WMI_EVENT_FN_3, 1, 0), { KEY_F17 } },
+
+ { KE_END }
};
static void bitland_notifier_unregister(void *data)
@@ -730,12 +776,35 @@ static int bitland_mifs_wmi_probe(struct wmi_device *wdev, const void *context)
&drv_data->notifier);
}
+static void bitland_mifs_wmi_report_key(struct wmi_device *wdev, u32 payload)
+{
+ struct bitland_mifs_wmi_data *data = dev_get_drvdata(&wdev->dev);
+ struct key_entry *entry;
+ bool autorelease = true;
+ int value = 1;
+
+ entry = sparse_keymap_entry_from_scancode(data->input_dev, payload);
+ if (!entry) {
+ dev_dbg(&wdev->dev, "Unknown WMI hotkey with payload 0x%08x\n", payload);
+ return;
+ }
+
+ /* AI key quirk */
+ if (entry->keycode == KEY_ASSISTANT) {
+ value = !(payload & AI_KEY_VALUE_MASK);
+ autorelease = false;
+ }
+
+ guard(mutex)(&data->lock);
+ sparse_keymap_report_entry(data->input_dev, entry, value, autorelease);
+}
+
static void bitland_mifs_wmi_notify(struct wmi_device *wdev,
const struct wmi_buffer *buffer)
{
- struct bitland_mifs_wmi_data *data = dev_get_drvdata(&wdev->dev);
const struct bitland_mifs_event *event = buffer->data;
struct bitland_fan_notify_data fan_data;
+ u32 payload;
u8 brightness;
/* Validate event type */
@@ -752,24 +821,13 @@ static void bitland_mifs_wmi_notify(struct wmi_device *wdev,
blocking_notifier_call_chain(&bitland_notifier_list,
BITLAND_NOTIFY_KBD_BRIGHTNESS,
&brightness);
- break;
+ return;
case WMI_EVENT_PERFORMANCE_PLAN:
blocking_notifier_call_chain(&bitland_notifier_list,
BITLAND_NOTIFY_PLATFORM_PROFILE,
NULL);
- break;
-
- case WMI_EVENT_OPEN_APP:
- case WMI_EVENT_CALCULATOR_START:
- case WMI_EVENT_BROWSER_START: {
- guard(mutex)(&data->lock);
- if (!sparse_keymap_report_event(data->input_dev,
- event->event_id, 1, true))
- dev_warn(&wdev->dev, "Unknown key pressed: 0x%02x\n",
- event->event_id);
- break;
- }
+ return;
/*
* The device has 3 fans (CPU, GPU, SYS),
@@ -777,6 +835,14 @@ static void bitland_mifs_wmi_notify(struct wmi_device *wdev,
*/
case WMI_EVENT_CPU_FAN_SPEED:
case WMI_EVENT_GPU_FAN_SPEED:
+ /* Redmi refresh rate toggle quirk */
+ if (event->event_id == WMI_EVENT_CPU_FAN_SPEED &&
+ event->value_low == 0 && event->value_high == 0) {
+ payload = BI_HOTKEY_CODE(WMI_EVENT_REFRESH_RATE, 0, 0);
+ bitland_mifs_wmi_report_key(wdev, payload);
+ return;
+ }
+
if (event->event_id == WMI_EVENT_CPU_FAN_SPEED)
fan_data.channel = 0;
else
@@ -787,27 +853,14 @@ static void bitland_mifs_wmi_notify(struct wmi_device *wdev,
blocking_notifier_call_chain(&bitland_notifier_list,
BITLAND_NOTIFY_HWMON,
&fan_data);
- break;
-
- case WMI_EVENT_AIRPLANE_MODE:
- case WMI_EVENT_TOUCHPAD_STATE:
- case WMI_EVENT_FNLOCK_STATE:
- case WMI_EVENT_KBD_MODE:
- case WMI_EVENT_CAPSLOCK_STATE:
- case WMI_EVENT_NUMLOCK_STATE:
- case WMI_EVENT_SCROLLLOCK_STATE:
- case WMI_EVENT_REFRESH_RATE:
- case WMI_EVENT_WIN_KEY_LOCK:
- /* These events are informational or handled by firmware */
- dev_dbg(&wdev->dev, "State change event: id=%d value=%d\n",
- event->event_id, event->value_low);
- break;
+ return;
default:
- dev_dbg(&wdev->dev, "Unknown event: id=0x%02x value=0x%02x\n",
- event->event_id, event->value_low);
break;
}
+
+ payload = get_unaligned_le32(buffer->data);
+ bitland_mifs_wmi_report_key(wdev, payload);
}
static const struct wmi_device_id bitland_mifs_wmi_id_table[] = {
--
2.55.0