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Fri, 27 Feb 2026 15:50:53 -0800 (PST) Received: from achantapc.tail227c81.ts.net ([128.172.224.28]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-899c715a87esm52397446d6.4.2026.02.27.15.50.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 27 Feb 2026 15:50:53 -0800 (PST) From: Sriman Achanta To: Jiri Kosina , Benjamin Tissoires Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, Bastien Nocera , Simon Wood , Christian Mayer , Sriman Achanta Subject: [PATCH v3 09/18] HID: steelseries: Add Bluetooth state sysfs attributes Date: Fri, 27 Feb 2026 18:50:33 -0500 Message-ID: <20260227235042.410062-10-srimanachanta@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260227235042.410062-1-srimanachanta@gmail.com> References: <20260227235042.410062-1-srimanachanta@gmail.com> Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add read-only sysfs attributes bt_enabled and bt_device_connected that reflect the current Bluetooth radio state for headsets that support it. Attributes are registered via an attribute group with an is_visible callback so they only appear on capable devices. Bluetooth state is decoded from the following HID reports: - Arctis Nova 7 Gen2: 0xb0 initial status packet and 0xb5 async events - Arctis Nova Pro: initial 0x06/0x14 status packet Returns -ENODEV if the headset is not currently connected. Signed-off-by: Sriman Achanta --- drivers/hid/hid-steelseries.c | 111 +++++++++++++++++++++++++++++++++- 1 file changed, 109 insertions(+), 2 deletions(-) diff --git a/drivers/hid/hid-steelseries.c b/drivers/hid/hid-steelseries.c index 3de8e1555263..8c6116d02f19 100644 --- a/drivers/hid/hid-steelseries.c +++ b/drivers/hid/hid-steelseries.c @@ -24,6 +24,8 @@ #define SS_CAP_BATTERY BIT(0) #define SS_CAP_CHATMIX BIT(1) #define SS_CAP_MIC_MUTE BIT(2) +#define SS_CAP_BT_ENABLED BIT(3) +#define SS_CAP_BT_DEVICE_CONNECTED BIT(4) #define SS_QUIRK_STATUS_SYNC_POLL BIT(0) @@ -62,6 +64,9 @@ struct steelseries_device { u8 chatmix_game; bool mic_muted; + bool bt_enabled; + bool bt_device_connected; + spinlock_t lock; bool removed; }; @@ -641,6 +646,20 @@ static void steelseries_arctis_nova_7_gen2_parse_status(struct steelseries_devic sd->battery_charging = (data[3] == 0x01); sd->chatmix_game = data[4]; sd->chatmix_chat = data[5]; + switch (data[6]) { + case 0x00: + sd->bt_enabled = false; + sd->bt_device_connected = false; + break; + case 0x03: + sd->bt_enabled = true; + sd->bt_device_connected = false; + break; + case 0x02: + sd->bt_enabled = true; + sd->bt_device_connected = true; + break; + } sd->mic_muted = (data[9] == 0x01); break; case 0xb7: @@ -659,6 +678,15 @@ static void steelseries_arctis_nova_7_gen2_parse_status(struct steelseries_devic case 0x52: sd->mic_muted = (data[2] == 0x01); break; + case 0xb5: + if (data[1] == 0x01) { + sd->bt_enabled = false; + sd->bt_device_connected = false; + } else if (data[1] == 0x04) { + sd->bt_enabled = true; + sd->bt_device_connected = (data[2] == 0x01); + } + break; } } @@ -673,6 +701,8 @@ static void steelseries_arctis_nova_pro_parse_status(struct steelseries_device * sd->battery_capacity = steelseries_map_capacity(data[6], 0x00, 0x08); sd->battery_charging = (data[15] == 0x02); sd->mic_muted = (data[9] == 0x01); + sd->bt_enabled = (data[4] == 0x00); + sd->bt_device_connected = (data[5] == 0x01); } else if (data[0] == 0x07 && data[1] == 0x45) { sd->chatmix_game = data[2]; sd->chatmix_chat = data[3]; @@ -760,14 +790,16 @@ static const struct steelseries_device_info arctis_nova_7p_info = { static const struct steelseries_device_info arctis_nova_7_gen2_info = { .sync_interface = 3, .async_interface = 5, - .capabilities = SS_CAP_BATTERY | SS_CAP_CHATMIX | SS_CAP_MIC_MUTE, + .capabilities = SS_CAP_BATTERY | SS_CAP_CHATMIX | SS_CAP_MIC_MUTE | + SS_CAP_BT_ENABLED | SS_CAP_BT_DEVICE_CONNECTED, .request_status = steelseries_arctis_nova_request_status, .parse_status = steelseries_arctis_nova_7_gen2_parse_status, }; static const struct steelseries_device_info arctis_nova_pro_info = { .sync_interface = 4, - .capabilities = SS_CAP_BATTERY | SS_CAP_CHATMIX | SS_CAP_MIC_MUTE, + .capabilities = SS_CAP_BATTERY | SS_CAP_CHATMIX | SS_CAP_MIC_MUTE | + SS_CAP_BT_ENABLED | SS_CAP_BT_DEVICE_CONNECTED, .quirks = SS_QUIRK_STATUS_SYNC_POLL, .request_status = steelseries_arctis_nova_pro_request_status, .parse_status = steelseries_arctis_nova_pro_parse_status, @@ -908,6 +940,70 @@ static int steelseries_battery_register(struct steelseries_device *sd) return 0; } +/* + * Sysfs attributes for device state + */ + +static ssize_t bt_enabled_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct hid_device *hdev = to_hid_device(dev); + struct steelseries_device *sd = hid_get_drvdata(hdev); + + if (!sd->headset_connected) + return -ENODEV; + + return sysfs_emit(buf, "%d\n", sd->bt_enabled); +} + +static ssize_t bt_device_connected_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct hid_device *hdev = to_hid_device(dev); + struct steelseries_device *sd = hid_get_drvdata(hdev); + + if (!sd->headset_connected) + return -ENODEV; + + return sysfs_emit(buf, "%d\n", sd->bt_device_connected); +} + +static DEVICE_ATTR_RO(bt_enabled); +static DEVICE_ATTR_RO(bt_device_connected); + +static struct attribute *steelseries_headset_attrs[] = { + &dev_attr_bt_enabled.attr, + &dev_attr_bt_device_connected.attr, + NULL, +}; + +static umode_t steelseries_headset_attr_is_visible(struct kobject *kobj, + struct attribute *attr, + int index) +{ + struct device *dev = kobj_to_dev(kobj); + struct hid_device *hdev = to_hid_device(dev); + struct steelseries_device *sd = hid_get_drvdata(hdev); + unsigned long caps; + + if (!sd) + return 0; + + caps = sd->info->capabilities; + + if (attr == &dev_attr_bt_enabled.attr) + return (caps & SS_CAP_BT_ENABLED) ? attr->mode : 0; + if (attr == &dev_attr_bt_device_connected.attr) + return (caps & SS_CAP_BT_DEVICE_CONNECTED) ? attr->mode : 0; + + return 0; +} + +static const struct attribute_group steelseries_headset_attr_group = { + .attrs = steelseries_headset_attrs, + .is_visible = steelseries_headset_attr_is_visible, +}; + #if IS_BUILTIN(CONFIG_SND) || \ (IS_MODULE(CONFIG_SND) && IS_MODULE(CONFIG_HID_STEELSERIES)) @@ -1218,6 +1314,13 @@ static int steelseries_probe(struct hid_device *hdev, hid_warn(hdev, "Failed to register battery: %d\n", ret); } + if (info->capabilities & (SS_CAP_BT_ENABLED | SS_CAP_BT_DEVICE_CONNECTED)) { + ret = sysfs_create_group(&hdev->dev.kobj, + &steelseries_headset_attr_group); + if (ret) + hid_warn(hdev, "Failed to create sysfs group: %d\n", ret); + } + #if IS_BUILTIN(CONFIG_SND) || \ (IS_MODULE(CONFIG_SND) && IS_MODULE(CONFIG_HID_STEELSERIES)) ret = steelseries_snd_register(sd); @@ -1289,6 +1392,10 @@ static void steelseries_remove(struct hid_device *hdev) } if (interface_num == sd->info->sync_interface) { + if (sd->info->capabilities & (SS_CAP_BT_ENABLED | SS_CAP_BT_DEVICE_CONNECTED)) + sysfs_remove_group(&hdev->dev.kobj, + &steelseries_headset_attr_group); + if (sd->info->async_interface) { struct hid_device *sibling; -- 2.53.0