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(unknown [172.25.130.133]) by node4.com.cn (NSMail) with ESMTPA id 45E661600810D; Tue, 14 Jan 2025 06:39:37 +0000 (UTC) From: Ai Chao To: hdegoede@redhat.com, ilpo.jarvinen@linux.intel.com, platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Ai Chao Subject: [PATCH v6] platform/x86: lenovo-wmi-camera: Use SW_CAMERA_LENS_COVER instead of KEY_CAMERA_ACESS Date: Tue, 14 Jan 2025 14:39:34 +0800 Message-ID: <20250114063934.3116444-1-aichao@kylinos.cn> X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: platform-driver-x86@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Use SW_CAMERA_LENS_COVER instead of KEY_CAMERA_ACESS_ENABLE and KEY_CAMERA_ACESS_DISABLE. When the camera toggle switch was hit, the lenovo-wmi-camera driver would report an event code. Signed-off-by: Ai Chao --- change for v6 -Change mutex() to guard(). change for v5 -Add input_report_switch before input_register_device. change for v4 -Add mutex_unlock and report a switch state of 0 if SW_CAMERA_ON. change for v3 -Used input_register_device and input_allocate_device. change for v2 -Only delays the input-device registration and switches to reporting SW_CAMERA_LENS_COVER. drivers/platform/x86/lenovo-wmi-camera.c | 75 +++++++++++++++--------- 1 file changed, 46 insertions(+), 29 deletions(-) diff --git a/drivers/platform/x86/lenovo-wmi-camera.c b/drivers/platform/x86/lenovo-wmi-camera.c index 0c0bedaf7407..36835cd64758 100644 --- a/drivers/platform/x86/lenovo-wmi-camera.c +++ b/drivers/platform/x86/lenovo-wmi-camera.c @@ -13,12 +13,15 @@ #include #include #include +#include #define WMI_LENOVO_CAMERABUTTON_EVENT_GUID "50C76F1F-D8E4-D895-0A3D-62F4EA400013" +/* Lenovo WMI camera button notify lock */ +static DEFINE_MUTEX(notify_lock); + struct lenovo_wmi_priv { struct input_dev *idev; - struct mutex notify_lock; /* lenovo WMI camera button notify lock */ }; enum { @@ -26,10 +29,38 @@ enum { SW_CAMERA_ON = 1, }; +static int camera_shutter_input_setup(struct wmi_device *wdev, u8 camera_mode) +{ + struct lenovo_wmi_priv *priv = dev_get_drvdata(&wdev->dev); + int err; + + priv->idev = input_allocate_device(); + if (!priv->idev) + return -ENOMEM; + + priv->idev->name = "Lenovo WMI Camera Button"; + priv->idev->phys = "wmi/input0"; + priv->idev->id.bustype = BUS_HOST; + priv->idev->dev.parent = &wdev->dev; + + input_set_capability(priv->idev, EV_SW, SW_CAMERA_LENS_COVER); + + input_report_switch(priv->idev, SW_CAMERA_LENS_COVER, + camera_mode == SW_CAMERA_ON ? 0 : 1); + input_sync(priv->idev); + + err = input_register_device(priv->idev); + if (err) { + input_free_device(priv->idev); + priv->idev = NULL; + } + + return err; +} + static void lenovo_wmi_notify(struct wmi_device *wdev, union acpi_object *obj) { struct lenovo_wmi_priv *priv = dev_get_drvdata(&wdev->dev); - unsigned int keycode; u8 camera_mode; if (obj->type != ACPI_TYPE_BUFFER) { @@ -53,22 +84,24 @@ static void lenovo_wmi_notify(struct wmi_device *wdev, union acpi_object *obj) return; } - mutex_lock(&priv->notify_lock); + guard(mutex)(¬ify_lock); - keycode = camera_mode == SW_CAMERA_ON ? - KEY_CAMERA_ACCESS_ENABLE : KEY_CAMERA_ACCESS_DISABLE; - input_report_key(priv->idev, keycode, 1); - input_sync(priv->idev); - input_report_key(priv->idev, keycode, 0); - input_sync(priv->idev); + if (!priv->idev) { + if (camera_shutter_input_setup(wdev, camera_mode)) + dev_warn(&wdev->dev, "Failed to register input device\n"); + return; + } - mutex_unlock(&priv->notify_lock); + if (camera_mode == SW_CAMERA_ON) + input_report_switch(priv->idev, SW_CAMERA_LENS_COVER, 0); + else + input_report_switch(priv->idev, SW_CAMERA_LENS_COVER, 1); + input_sync(priv->idev); } static int lenovo_wmi_probe(struct wmi_device *wdev, const void *context) { struct lenovo_wmi_priv *priv; - int ret; priv = devm_kzalloc(&wdev->dev, sizeof(*priv), GFP_KERNEL); if (!priv) @@ -76,23 +109,6 @@ static int lenovo_wmi_probe(struct wmi_device *wdev, const void *context) dev_set_drvdata(&wdev->dev, priv); - priv->idev = devm_input_allocate_device(&wdev->dev); - if (!priv->idev) - return -ENOMEM; - - priv->idev->name = "Lenovo WMI Camera Button"; - priv->idev->phys = "wmi/input0"; - priv->idev->id.bustype = BUS_HOST; - priv->idev->dev.parent = &wdev->dev; - input_set_capability(priv->idev, EV_KEY, KEY_CAMERA_ACCESS_ENABLE); - input_set_capability(priv->idev, EV_KEY, KEY_CAMERA_ACCESS_DISABLE); - - ret = input_register_device(priv->idev); - if (ret) - return ret; - - mutex_init(&priv->notify_lock); - return 0; } @@ -100,7 +116,8 @@ static void lenovo_wmi_remove(struct wmi_device *wdev) { struct lenovo_wmi_priv *priv = dev_get_drvdata(&wdev->dev); - mutex_destroy(&priv->notify_lock); + if (priv->idev) + input_unregister_device(priv->idev); } static const struct wmi_device_id lenovo_wmi_id_table[] = {