From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mta1.migadu.com (out-49.mta1.migadu.com [95.215.58.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8A858483BF7 for ; Thu, 13 Aug 2026 14:47:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.49 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786632472; cv=none; b=MgLoa7Rst79ujwcjKzo1pB9I9t8h5zqcLipUm1Vvd33OIe9U0Hgbf8iy2km7bPqLaqJED70De3uxTW/orXZiZC18WsXsnL9StQwFN0cCv0D56N47M1flfp+Rjax72ybwtV9h/ZiMHrttXZPM77DYzIlDD++1FNLITcLf0dt0YbE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786632472; c=relaxed/simple; bh=jY6uMnydXj+xwOlApdT+OiOaQ2ULudcF/ky4VT9HY6w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DLUbx5erxKdMx1JoMOocmuuDWwbNovIq08uE2HdQpUEl1+L09Xjh8WoZwGy8UFWIrXpjnAPfA6bhPvj+02DGhSqNmDP76PE7nfzUBiySNIhf1wT4267qVHWtigt2ndZCQcdTc0T0+SL2P5F8PUiEpUjzz4a6yc/1WvUUBr5sfns= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=SeRwGzwn; arc=none smtp.client-ip=95.215.58.49 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) header.d=linux.dev header.i=@linux.dev header.b="SeRwGzwn" X-Envelope-To: linux-kernel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=jY6uMnydXj+xwOlApdT+OiOaQ2ULudcF/ky4VT9HY6w=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1786632465; v=1; x=1787237265; b=SeRwGzwnOF3B9XGXosGbGlNev0DJpiRgMOG9x4QyOEiKaXUtK1qWUb9dUdgqbgHCFsFw6mRT D2uohb2UwMskKQILHL+g9yd+f+FnwkpHVYfeb1IuZ1haCuh/qQr2JaNOrBEfPpoHZXbvt5g38Ou frw7smho3nMXYMOdXIeBYPbc= X-Envelope-To: linux-kernel@vger.kernel.org Received: from kernel.denis-pc.lan (151.61.14.130) by smtp.migadu.com with ESMTPS id 08bed4af982775f9; Thu, 13 Aug 2026 14:47:45 +0000 X-Migadu-Flow: FLOW_OUT From: Denis Benato To: linux-kernel@vger.kernel.org Cc: linux-input@vger.kernel.org, "Benjamin Tissoires" , "Jiri Kosina" , "Luke D . Jones" , "Mateusz Schwartz" , "Denis Benato" , "Jonathan LoBue" , "Khamunetri Clark" , "Derek J. Clark" , Denis Benato Subject: [PATCH 08/12] HID: asus: add support for response curve Date: Thu, 13 Aug 2026 14:47:32 +0000 Message-ID: <20260813144736.2477941-9-denis.benato@linux.dev> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260813144736.2477941-1-denis.benato@linux.dev> References: <20260813144736.2477941-1-denis.benato@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit ROG ally devices allows configuring the response curve of both joysticks, therefore add the ability of userspace to modify the response curve by exposing relevant sysfs attributes. Signed-off-by: Denis Benato Signed-off-by: Luke Jones --- drivers/hid/hid-asus.c | 375 ++++++++++++++++++++++++++++++++++++++++- 1 file changed, 374 insertions(+), 1 deletion(-) diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c index 8ed10c5b22ab..8018e61cf026 100644 --- a/drivers/hid/hid-asus.c +++ b/drivers/hid/hid-asus.c @@ -137,7 +137,15 @@ MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad"); struct device_attribute dev_attr_##_name = \ __ATTR(_sysfs_name, 0444, _name##_show, NULL) -#define ALLY_DEVICE_CONST_ATTR_RO(fname, sysfs_name, value) \ +#define ALLY_DEVICE_ATTR_WO(_name, _sysfs_name) \ + struct device_attribute dev_attr_##_name = \ + __ATTR(_sysfs_name, 0200, NULL, _name##_store) + +#define ALLY_DEVICE_ATTR_RW(_name, _sysfs_name) \ + struct device_attribute dev_attr_##_name = \ + __ATTR(_sysfs_name, 0644, _name##_show, _name##_store) + +#define ALLY_DEVICE_CONST_ATTR_RO(fname, sysfs_name, value) \ static ssize_t fname##_show(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ @@ -190,6 +198,18 @@ struct asus_touchpad_info { int report_size; }; +struct ally_joystick_resp_curve_param { + u8 move; + u8 resp; +} __packed; + +struct ally_joystick_resp_curve { + struct ally_joystick_resp_curve_param entry_1; + struct ally_joystick_resp_curve_param entry_2; + struct ally_joystick_resp_curve_param entry_3; + struct ally_joystick_resp_curve_param entry_4; +} __packed; + struct ally_config { /* Must be locked if the data is being changed */ struct mutex config_mutex; @@ -223,6 +243,9 @@ struct ally_config { u8 vibration_intensity_left; u8 vibration_intensity_right; bool vibration_active; + + struct ally_joystick_resp_curve left_curve; + struct ally_joystick_resp_curve right_curve; }; struct ally_handheld { @@ -1584,6 +1607,319 @@ static struct device_attribute dev_attr_right_trigger_range_upper_limit = static struct device_attribute dev_attr_right_trigger_range_upper_limit_range = __ATTR(range_upper_limit_range, 0444, right_trigger_range_upper_limit_range_show, NULL); +enum ally_joystick_side { + JOYSTICK_LEFT = 0, + JOYSTICK_RIGHT, +}; + +/** + * ally_set_joystick_resp_curve - Set joystick response curve parameters + * @hdev: HID device + * @side: Which joystick side (0=left, 1=right) + * @curve: Response curve parameter structure + * + * Return: 0 on success, negative on failure + */ +static int ally_set_joystick_resp_curve(struct hid_device *hdev, enum ally_joystick_side side, + struct ally_joystick_resp_curve *curve) +{ + const u8 payload[] = { side, + curve->entry_1.move, curve->entry_1.resp, + curve->entry_2.move, curve->entry_2.resp, + curve->entry_3.move, curve->entry_3.resp, + curve->entry_4.move, curve->entry_4.resp + }; + int ret; + + u8 *buf __free(kfree) = ally_alloc_cmd(CMD_SET_RESP_CURVE, payload, sizeof(payload)); + if (!buf) + return -ENOMEM; + + ret = ally_dev_set_report(hdev, buf, ROG_ALLY_REPORT_SIZE); + if (ret < 0) + return ret; + + return 0; +} + +static int response_curve_apply(struct hid_device *hdev, bool is_left) +{ + struct asus_drvdata *drvdata = hid_get_drvdata(hdev); + struct ally_handheld *const ally = drvdata->rog_ally; + struct ally_config *cfg = ally->config; + struct ally_joystick_resp_curve curve; + int ret; + + /* + * Snapshot under the lock so a concurrent sysfs write cannot change an + * entry between the monotonicity check and the packet being built. + */ + scoped_guard(mutex, &cfg->config_mutex) + curve = is_left ? cfg->left_curve : cfg->right_curve; + + if (!(curve.entry_1.move < curve.entry_2.move && + curve.entry_2.move < curve.entry_3.move && + curve.entry_3.move < curve.entry_4.move)) + return -EINVAL; + + ret = ally_set_joystick_resp_curve(hdev, + is_left ? JOYSTICK_LEFT : JOYSTICK_RIGHT, + &curve); + if (ret) { + hid_err(hdev, "Failed to set joystick response curve: %d\n", ret); + return ret; + } + + return 0; +} + +static ssize_t left_response_curve_apply_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct hid_device *hdev = to_hid_device(dev); + struct asus_drvdata *drvdata = hid_get_drvdata(hdev); + struct ally_handheld *const ally = drvdata->rog_ally; + bool apply; + int ret; + + if (!ally || !ally->config) + return -ENODEV; + + if (!ally->config->resp_curve_support) + return -EOPNOTSUPP; + + ret = kstrtobool(buf, &apply); + if (ret) + return ret; + + if (!apply) + return count; + + ret = response_curve_apply(hdev, true); + if (ret < 0) + return ret; + + return count; +} + +static ssize_t right_response_curve_apply_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct hid_device *hdev = to_hid_device(dev); + struct asus_drvdata *drvdata = hid_get_drvdata(hdev); + struct ally_handheld *const ally = drvdata->rog_ally; + bool apply; + int ret; + + if (!ally || !ally->config) + return -ENODEV; + + if (!ally->config->resp_curve_support) + return -EOPNOTSUPP; + + ret = kstrtobool(buf, &apply); + if (ret) + return ret; + + if (!apply) + return count; + + ret = response_curve_apply(hdev, false); + if (ret < 0) + return ret; + + return count; +} + +static ALLY_DEVICE_ATTR_WO(left_response_curve_apply, response_curve_apply); +static ALLY_DEVICE_ATTR_WO(right_response_curve_apply, response_curve_apply); + +static ssize_t response_curve_pct_show(struct device *dev, + struct device_attribute *attr, char *buf, + struct ally_joystick_resp_curve *curve, + int idx) +{ + switch (idx) { + case 1: return sysfs_emit(buf, "%u\n", curve->entry_1.resp); + case 2: return sysfs_emit(buf, "%u\n", curve->entry_2.resp); + case 3: return sysfs_emit(buf, "%u\n", curve->entry_3.resp); + case 4: return sysfs_emit(buf, "%u\n", curve->entry_4.resp); + default: return -EINVAL; + } +} + +static ssize_t response_curve_move_show(struct device *dev, + struct device_attribute *attr, char *buf, + struct ally_joystick_resp_curve *curve, + int idx) +{ + switch (idx) { + case 1: return sysfs_emit(buf, "%u\n", curve->entry_1.move); + case 2: return sysfs_emit(buf, "%u\n", curve->entry_2.move); + case 3: return sysfs_emit(buf, "%u\n", curve->entry_3.move); + case 4: return sysfs_emit(buf, "%u\n", curve->entry_4.move); + default: return -EINVAL; + } +} + +static ssize_t response_curve_pct_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count, + bool is_left, + struct ally_handheld *ally, int idx) +{ + struct ally_config *cfg = ally->config; + struct ally_joystick_resp_curve *curve; + u8 value; + int ret; + + if (!cfg->resp_curve_support) + return -EOPNOTSUPP; + + ret = kstrtou8(buf, 10, &value); + if (ret) + return ret; + + if (value > 100) + return -EINVAL; + + curve = is_left ? &cfg->left_curve : &cfg->right_curve; + + scoped_guard(mutex, &cfg->config_mutex) { + switch (idx) { + case 1: + curve->entry_1.resp = value; + break; + case 2: + curve->entry_2.resp = value; + break; + case 3: + curve->entry_3.resp = value; + break; + case 4: + curve->entry_4.resp = value; + break; + default: + return -EINVAL; + } + } + + return count; +} + +static ssize_t response_curve_move_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count, + bool is_left, + struct ally_handheld *ally, int idx) +{ + struct ally_config *cfg = ally->config; + struct ally_joystick_resp_curve *curve; + u8 value; + int ret; + + if (!cfg->resp_curve_support) + return -EOPNOTSUPP; + + ret = kstrtou8(buf, 10, &value); + if (ret) + return ret; + + if (value > 100) + return -EINVAL; + + curve = is_left ? &cfg->left_curve : &cfg->right_curve; + + scoped_guard(mutex, &cfg->config_mutex) { + switch (idx) { + case 1: + curve->entry_1.move = value; + break; + case 2: + curve->entry_2.move = value; + break; + case 3: + curve->entry_3.move = value; + break; + case 4: + curve->entry_4.move = value; + break; + default: + return -EINVAL; + } + } + + return count; +} + +#define DEFINE_JS_CURVE_PCT_FOPS(region, side) \ + static ssize_t side##_response_curve_pct_##region##_show( \ + struct device *dev, struct device_attribute *attr, char *buf) \ + { \ + struct hid_device *hdev = to_hid_device(dev); \ + struct asus_drvdata *drvdata = hid_get_drvdata(hdev); \ + struct ally_handheld *ally = drvdata->rog_ally; \ + return response_curve_pct_show( \ + dev, attr, buf, &ally->config->side##_curve, region);\ + } \ + \ + static ssize_t side##_response_curve_pct_##region##_store( \ + struct device *dev, struct device_attribute *attr, \ + const char *buf, size_t count) \ + { \ + struct hid_device *hdev = to_hid_device(dev); \ + struct asus_drvdata *drvdata = hid_get_drvdata(hdev); \ + struct ally_handheld *ally = drvdata->rog_ally; \ + return response_curve_pct_store(dev, attr, buf, count, \ + side##_is_left, ally, region); \ + } + +#define DEFINE_JS_CURVE_MOVE_FOPS(region, side) \ + static ssize_t side##_response_curve_move_##region##_show( \ + struct device *dev, struct device_attribute *attr, char *buf) \ + { \ + struct hid_device *hdev = to_hid_device(dev); \ + struct asus_drvdata *drvdata = hid_get_drvdata(hdev); \ + struct ally_handheld *ally = drvdata->rog_ally; \ + return response_curve_move_show( \ + dev, attr, buf, &ally->config->side##_curve, region);\ + } \ + \ + static ssize_t side##_response_curve_move_##region##_store( \ + struct device *dev, struct device_attribute *attr, \ + const char *buf, size_t count) \ + { \ + struct hid_device *hdev = to_hid_device(dev); \ + struct asus_drvdata *drvdata = hid_get_drvdata(hdev); \ + struct ally_handheld *ally = drvdata->rog_ally; \ + return response_curve_move_store(dev, attr, buf, count, \ + side##_is_left, ally, region); \ + } + +#define DEFINE_JS_CURVE_ATTRS(region, side) \ + DEFINE_JS_CURVE_PCT_FOPS(region, side) \ + DEFINE_JS_CURVE_MOVE_FOPS(region, side) \ + static ALLY_DEVICE_ATTR_RW(side##_response_curve_pct_##region, \ + response_curve_pct_##region); \ + static ALLY_DEVICE_ATTR_RW(side##_response_curve_move_##region, \ + response_curve_move_##region) + +/* Helper defines for "is_left" parameter in DEFINE_JS_CURVE_ATTRS macros */ +#define left_is_left true +#define right_is_left false + +DEFINE_JS_CURVE_ATTRS(1, left); +DEFINE_JS_CURVE_ATTRS(2, left); +DEFINE_JS_CURVE_ATTRS(3, left); +DEFINE_JS_CURVE_ATTRS(4, left); + +DEFINE_JS_CURVE_ATTRS(1, right); +DEFINE_JS_CURVE_ATTRS(2, right); +DEFINE_JS_CURVE_ATTRS(3, right); +DEFINE_JS_CURVE_ATTRS(4, right); + static struct attribute *ally_config_attrs[] = { &dev_attr_xbox_controller.attr, NULL @@ -1608,6 +1944,15 @@ static struct attribute *left_joystick_axis_attrs[] = { &dev_attr_left_joystick_outer_threshold_range.attr, &dev_attr_left_joystick_anti_deadzone.attr, &dev_attr_left_joystick_anti_deadzone_range.attr, + &dev_attr_left_response_curve_pct_1.attr, + &dev_attr_left_response_curve_pct_2.attr, + &dev_attr_left_response_curve_pct_3.attr, + &dev_attr_left_response_curve_pct_4.attr, + &dev_attr_left_response_curve_move_1.attr, + &dev_attr_left_response_curve_move_2.attr, + &dev_attr_left_response_curve_move_3.attr, + &dev_attr_left_response_curve_move_4.attr, + &dev_attr_left_response_curve_apply.attr, NULL }; @@ -1618,6 +1963,15 @@ static struct attribute *right_joystick_axis_attrs[] = { &dev_attr_right_joystick_outer_threshold_range.attr, &dev_attr_right_joystick_anti_deadzone.attr, &dev_attr_right_joystick_anti_deadzone_range.attr, + &dev_attr_right_response_curve_pct_1.attr, + &dev_attr_right_response_curve_pct_2.attr, + &dev_attr_right_response_curve_pct_3.attr, + &dev_attr_right_response_curve_pct_4.attr, + &dev_attr_right_response_curve_move_1.attr, + &dev_attr_right_response_curve_move_2.attr, + &dev_attr_right_response_curve_move_3.attr, + &dev_attr_right_response_curve_move_4.attr, + &dev_attr_right_response_curve_apply.attr, NULL }; @@ -1711,6 +2065,25 @@ static struct ally_config *ally_config_create(struct hid_device *hdev, struct al cfg->vibration_intensity_right = 100; cfg->vibration_active = false; + /* Initialize default response curve values (linear) */ + cfg->left_curve.entry_1.move = 0; + cfg->left_curve.entry_1.resp = 0; + cfg->left_curve.entry_2.move = 33; + cfg->left_curve.entry_2.resp = 33; + cfg->left_curve.entry_3.move = 66; + cfg->left_curve.entry_3.resp = 66; + cfg->left_curve.entry_4.move = 100; + cfg->left_curve.entry_4.resp = 100; + + cfg->right_curve.entry_1.move = 0; + cfg->right_curve.entry_1.resp = 0; + cfg->right_curve.entry_2.move = 33; + cfg->right_curve.entry_2.resp = 33; + cfg->right_curve.entry_3.move = 66; + cfg->right_curve.entry_3.resp = 66; + cfg->right_curve.entry_4.move = 100; + cfg->right_curve.entry_4.resp = 100; + /* So far the only hardware this is supported is the Ally 1 */ if (cfg->xbox_controller_support) { ret = ally_set_xbox_controller(hdev, cfg, true); -- 2.47.3