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Fri, 27 Feb 2026 15:50:50 -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 06/18] HID: steelseries: Add ALSA sound card infrastructure Date: Fri, 27 Feb 2026 18:50:30 -0500 Message-ID: <20260227235042.410062-7-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-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Register an ALSA sound card for each supported Arctis headset to expose headset-specific audio controls to userspace. The card is created in steelseries_snd_register() and freed in steelseries_snd_unregister(), both guarded by a module compatibility check so that registration only occurs when both SND and HID_STEELSERIES are built-in or are both modules, avoiding a dependency mismatch. The Kconfig entry is updated to add SND as a dependency. Subsequent commits build on this infrastructure to register mixer controls. Signed-off-by: Sriman Achanta --- drivers/hid/Kconfig | 2 +- drivers/hid/hid-steelseries.c | 52 +++++++++++++++++++++++++++++++++++ 2 files changed, 53 insertions(+), 1 deletion(-) diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig index 29f05d4b7e30..fcdb5406159a 100644 --- a/drivers/hid/Kconfig +++ b/drivers/hid/Kconfig @@ -1139,7 +1139,7 @@ config STEAM_FF config HID_STEELSERIES tristate "Steelseries devices support" - depends on USB_HID + depends on USB_HID && SND help Support for Steelseries SRW-S1 steering wheel, and the Steelseries Arctis headset family (Arctis 1, Arctis 7, Arctis 7+, Arctis 9, diff --git a/drivers/hid/hid-steelseries.c b/drivers/hid/hid-steelseries.c index d8ece8449255..b7f932cde98d 100644 --- a/drivers/hid/hid-steelseries.c +++ b/drivers/hid/hid-steelseries.c @@ -16,6 +16,7 @@ #include #include #include +#include #include "hid-ids.h" @@ -50,6 +51,8 @@ struct steelseries_device { u8 battery_capacity; bool battery_charging; + struct snd_card *card; + spinlock_t lock; bool removed; }; @@ -830,6 +833,43 @@ static int steelseries_battery_register(struct steelseries_device *sd) return 0; } +#if IS_BUILTIN(CONFIG_SND) || \ + (IS_MODULE(CONFIG_SND) && IS_MODULE(CONFIG_HID_STEELSERIES)) + +static int steelseries_snd_register(struct steelseries_device *sd) +{ + struct hid_device *hdev = sd->hdev; + int ret; + + ret = snd_card_new(&hdev->dev, -1, "SteelSeries", THIS_MODULE, + 0, &sd->card); + if (ret < 0) + return ret; + + sd->card->private_data = sd; + strscpy(sd->card->driver, "SteelSeries"); + strscpy(sd->card->shortname, hdev->name); + snprintf(sd->card->longname, sizeof(sd->card->longname), + "%s at USB %s", hdev->name, dev_name(&hdev->dev)); + + ret = snd_card_register(sd->card); + if (ret < 0) { + snd_card_free(sd->card); + sd->card = NULL; + return ret; + } + + return 0; +} + +static void steelseries_snd_unregister(struct steelseries_device *sd) +{ + if (sd->card) + snd_card_free(sd->card); +} + +#endif + static int steelseries_raw_event(struct hid_device *hdev, struct hid_report *report, u8 *data, int size) { @@ -975,6 +1015,13 @@ static int steelseries_probe(struct hid_device *hdev, hid_warn(hdev, "Failed to register battery: %d\n", ret); } +#if IS_BUILTIN(CONFIG_SND) || \ + (IS_MODULE(CONFIG_SND) && IS_MODULE(CONFIG_HID_STEELSERIES)) + ret = steelseries_snd_register(sd); + if (ret < 0) + hid_warn(hdev, "Failed to register sound card: %d\n", ret); +#endif + INIT_DELAYED_WORK(&sd->status_work, steelseries_status_timer_work_handler); schedule_delayed_work(&sd->status_work, msecs_to_jiffies(100)); @@ -1048,6 +1095,11 @@ static void steelseries_remove(struct hid_device *hdev) hid_set_drvdata(sibling, NULL); } +#if IS_BUILTIN(CONFIG_SND) || \ + (IS_MODULE(CONFIG_SND) && IS_MODULE(CONFIG_HID_STEELSERIES)) + steelseries_snd_unregister(sd); +#endif + spin_lock_irqsave(&sd->lock, flags); sd->removed = true; spin_unlock_irqrestore(&sd->lock, flags); -- 2.53.0