From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=95.215.58.10 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793975063; b=qpvwF6UobxnkIwW3+PWT1cqrZ1AD1R+WpGzTh1IQC86dpM0KNptiTFWBzW03GmILVX6F Yv2amysfAZ/Vn7hf8zRCcLNIir0Ex5Rdcz6+UdUHCuqT2lCtpoCwCKRhxZT7A3rD7td9U bKXJO4jG/O72gmdCX7/6xuuki+u2RI5aMakP0L/LLlMUg7ctLHG77TlNMz7azcG75B/XQ mX5iQL8h4BPyFy03UozP1aVy+gP21Jw0BPbNWAAlM0cP2dtfzamzLbDOwctQGPe0exyF/ HFWvcMwpB2plfZ1b3epFatp+WzZ0+0Im6m3tqSsAom4SCkkPugRmZqNMxLLpIXdn7OA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793975063; h=DMARC-Filter:X-Envelope-To:DKIM-Signature:X-Envelope-To:Received: X-Mizu-Trace-ID:X-Migadu-Flow:From:To:Cc:Subject:Date:Message-ID: X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding; bh=wK/QUADOhtDBy5v8NTf2PyIss7fywjXdYgMX5FvxBvY=; b=xSne1vr2Y6MHDU7j2F0l8wlEDr9g+WcIw1Qo6SQEQBjCM26/o88HYBDVN0+Zhb3l83A1 Hbxg0BUPKZ0TwizIa3yEXql6akKLs2vd57jKbiwwRMNT32eNcsrnOg3MVviuPA493Eesu bAK4f6Aljx3AQCDZxdRCPIjLQY2S3B0oMbQElzEfAcUdu9Q8SbBf48sdoA8Obl7oadqN6 0D+ireN/XK4JiQldI8Bt+m8eOSvuQ55JO51ElJBe2A+R2YAhQ6VqcqRdRZFsePvjHL7M9 QT6T5g1OJ8o0Qutc/9RVC0lvxoMspcZDdVGrsyqmt739nCX3WYMob7gnJh5SsPVLixg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b="L//vkU5O"; arc=none smtp.remote-ip=95.215.58.10 Received: from mta1.migadu.com (out-10.mta1.migadu.com [95.215.58.10]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4A42C606A32E for ; Fri, 6 Nov 2026 14:24:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 4A42C606A32E Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=L//vkU5O X-Envelope-To: linux-kernel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=17p7FQgl3V2ul4qkasGkIfKEGleAg6lgdape87Laqvs=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1793975061; v=1; x=1794579861; b=L//vkU5O96hymap4cUJvZiBG/vBoFiOfzedp0vk9P02DmeF3FIpZRH2PZ5kIr7CwxZ44tkiB NXTXWoxlmFjWBnY5uDEZUPHxdWGNlDdbKsPYJDKO5utL7cKD32vMPeevR2Uc/ahog3oTNu9diBR 2eI1wHHTXL6iseUAdWlLr1ck= X-Envelope-To: linux-kernel@vger.kernel.org Received: by smtp.migadu.com with ESMTPS id 85908ad85ed2543e; Fri, 06 Nov 2026 14:24:21 +0000 X-Mizu-Trace-ID: 85908ad85ed2543e X-Migadu-Flow: FLOW_OUT From: Denis Benato To: linux-kernel@vger.kernel.org Cc: linux-input@vger.kernel.org, kernel@lists.opengamingcollective.org, "Benjamin Tissoires" , "Jiri Kosina" , "Luke D . Jones" , "Mateusz Schyboll" , "Denis Benato" , Denis Benato Subject: [PATCH v14 07/18] HID: asus: add joysticks anti-deadzone configuration Date: Fri, 6 Nov 2026 14:23:23 +0000 Message-ID: <20261106142334.1881-8-denis.benato@linux.dev> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20261106142334.1881-1-denis.benato@linux.dev> References: <20261106142334.1881-1-denis.benato@linux.dev> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit ROG Ally devices allow configuring the anti-deadzone parameter for the resistive joysticks devices as over time those develops drift, therefore allow userspace to configure the anti-deadzone by exposing relevant sysfs attributes. Signed-off-by: Denis Benato Co-developed-by: Luke Jones Signed-off-by: Luke Jones --- drivers/hid/hid-asus.c | 157 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 157 insertions(+) diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c index d8d79044a64c..005ea137bfdd 100644 --- a/drivers/hid/hid-asus.c +++ b/drivers/hid/hid-asus.c @@ -107,6 +107,9 @@ MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad"); #define ASUS_ALLY_INNER_THRESHOLD_MIN 0 #define ASUS_ALLY_INNER_THRESHOLD_MAX 50 +#define ASUS_ALLY_ANTI_DEADZONE_MIN 0 +#define ASUS_ALLY_ANTI_DEADZONE_MAX 100 + #define ASUS_ALLY_TRIGGER_RANGE_LOWER_MIN 0 #define ASUS_ALLY_TRIGGER_RANGE_LOWER_MAX 50 #define ASUS_ALLY_TRIGGER_RANGE_UPPER_MIN 70 @@ -850,6 +853,9 @@ static struct ally_prefs { u8 left_trigger_max; u8 right_trigger_min; u8 right_trigger_max; + + u8 left_anti_deadzone; + u8 right_anti_deadzone; } ally_prefs = { .lock = __MUTEX_INITIALIZER(ally_prefs.lock), }; @@ -1333,11 +1339,153 @@ static struct device_attribute dev_attr_right_joystick_outer_threshold = static struct device_attribute dev_attr_right_joystick_outer_threshold_range = __ATTR(outer_threshold_range, 0444, right_joystick_outer_threshold_range_show, NULL); +/** + * ally_set_anti_deadzone() - Send the joystick anti-deadzone values to the device + * @hdev: HID device the packet is sent on + * @left: Anti-deadzone of the left joystick + * @right: Anti-deadzone of the right joystick + * + * Context: Caller must hold ally_prefs.lock. + * + * Return: 0 on success, -%EOPNOTSUPP if the device does not support + * anti-deadzone, -%ENOMEM if the command buffer cannot be allocated, or a + * negative error code if sending the packet fails. + */ +static int ally_set_anti_deadzone(struct hid_device *hdev, u8 left, u8 right) +{ + const u8 payload[] = { left, right }; + size_t buf_len; + int ret; + + if (!ally_prefs.anti_deadzone_support) { + hid_dbg(hdev, "Anti-deadzone not supported on this device\n"); + return -EOPNOTSUPP; + } + + u8 *buf __free(kfree) = ally_alloc_cmd(hdev, CMD_SET_ANTI_DEADZONE, + payload, sizeof(payload), + &buf_len); + if (!buf) + return -ENOMEM; + + ret = ally_gamepad_send_packet(hdev, buf, buf_len); + if (ret < 0) { + hid_err(hdev, "Failed to set anti-deadzone values: %d\n", ret); + return ret; + } + + return 0; +} + +/* Indices into ally_anti_deadzones[] */ +enum ally_joystick { + ALLY_LEFT_JOYSTICK, + ALLY_RIGHT_JOYSTICK, +}; + +static u8 *const ally_anti_deadzones[] = { + [ALLY_LEFT_JOYSTICK] = &ally_prefs.left_anti_deadzone, + [ALLY_RIGHT_JOYSTICK] = &ally_prefs.right_anti_deadzone, +}; + +static ssize_t ally_anti_deadzone_show(struct device *dev, char *buf, + enum ally_joystick which) +{ + guard(mutex)(&ally_prefs.lock); + + if (!ally_prefs.anti_deadzone_support) { + hid_dbg(to_hid_device(dev), "Anti-deadzone not supported on this device\n"); + return -EOPNOTSUPP; + } + + return sysfs_emit(buf, "%u\n", *ally_anti_deadzones[which]); +} + +static ssize_t ally_anti_deadzone_store(struct device *dev, const char *buf, + size_t count, enum ally_joystick which, + const char *group) +{ + u8 value, dz[ARRAY_SIZE(ally_anti_deadzones)]; + struct hid_device *hdev = to_hid_device(dev); + unsigned int i; + int ret; + + ret = kstrtou8(buf, 10, &value); + if (ret || value > ASUS_ALLY_ANTI_DEADZONE_MAX) + return -EINVAL; + + scoped_guard(mutex, &ally_prefs.lock) { + if (!ally_prefs.anti_deadzone_support) { + hid_dbg(hdev, "Anti-deadzone not supported on this device\n"); + return -EOPNOTSUPP; + } + + for (i = 0; i < ARRAY_SIZE(dz); i++) + dz[i] = *ally_anti_deadzones[i]; + dz[which] = value; + + ret = ally_set_anti_deadzone(hdev, dz[ALLY_LEFT_JOYSTICK], + dz[ALLY_RIGHT_JOYSTICK]); + if (ret) + return ret; + + *ally_anti_deadzones[which] = value; + } + + sysfs_notify(&dev->kobj, group, "anti_deadzone"); + + return count; +} + +/* Generates _joystick_anti_deadzone_{show,store,range_show}. */ +#define ALLY_ANTI_DEADZONE_FUNCS(side, SIDE) \ +static ssize_t side##_joystick_anti_deadzone_show(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + return ally_anti_deadzone_show(dev, buf, ALLY_##SIDE##_JOYSTICK); \ +} \ + \ +static ssize_t side##_joystick_anti_deadzone_store(struct device *dev, \ + struct device_attribute *attr, \ + const char *buf, size_t count) \ +{ \ + return ally_anti_deadzone_store(dev, buf, count, ALLY_##SIDE##_JOYSTICK, \ + #side "_joystick_axis"); \ +} \ + \ +static ssize_t side##_joystick_anti_deadzone_range_show(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + return sysfs_emit(buf, "%u %u\n", ASUS_ALLY_ANTI_DEADZONE_MIN, \ + ASUS_ALLY_ANTI_DEADZONE_MAX); \ +} + +ALLY_ANTI_DEADZONE_FUNCS(left, LEFT) +ALLY_ANTI_DEADZONE_FUNCS(right, RIGHT) + +static struct device_attribute dev_attr_left_joystick_anti_deadzone = + __ATTR(anti_deadzone, 0644, left_joystick_anti_deadzone_show, + left_joystick_anti_deadzone_store); + +static struct device_attribute dev_attr_left_joystick_anti_deadzone_range = + __ATTR(anti_deadzone_range, 0444, left_joystick_anti_deadzone_range_show, NULL); + +static struct device_attribute dev_attr_right_joystick_anti_deadzone = + __ATTR(anti_deadzone, 0644, right_joystick_anti_deadzone_show, + right_joystick_anti_deadzone_store); + +static struct device_attribute dev_attr_right_joystick_anti_deadzone_range = + __ATTR(anti_deadzone_range, 0444, right_joystick_anti_deadzone_range_show, NULL); + static struct attribute *left_joystick_axis_attrs[] = { &dev_attr_left_joystick_inner_threshold.attr, &dev_attr_left_joystick_outer_threshold.attr, &dev_attr_left_joystick_inner_threshold_range.attr, &dev_attr_left_joystick_outer_threshold_range.attr, + &dev_attr_left_joystick_anti_deadzone.attr, + &dev_attr_left_joystick_anti_deadzone_range.attr, NULL }; @@ -1346,6 +1494,8 @@ static struct attribute *right_joystick_axis_attrs[] = { &dev_attr_right_joystick_outer_threshold.attr, &dev_attr_right_joystick_inner_threshold_range.attr, &dev_attr_right_joystick_outer_threshold_range.attr, + &dev_attr_right_joystick_anti_deadzone.attr, + &dev_attr_right_joystick_anti_deadzone_range.attr, NULL }; @@ -1924,6 +2074,13 @@ static int hid_asus_ally_init(struct hid_device *hdev) hid_warn(hdev, "Failed to restore trigger ranges: %d\n", ret); } + if (ally_prefs.initialized && ally_prefs.anti_deadzone_support) { + ret = ally_set_anti_deadzone(hdev, ally_prefs.left_anti_deadzone, + ally_prefs.right_anti_deadzone); + if (ret < 0) + hid_warn(hdev, "Failed to restore anti-deadzone: %d\n", ret); + } + return 0; } -- 2.47.3