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Message-Id: <20220802045942.1565559-1-luke@ljones.dev>
Date: Tue, 2 Aug 2022 16:59:42 +1200
From: "Luke D. Jones" <luke@...nes.dev>
To: hdegoede@...hat.com
Cc: corentin.chary@...il.com, markgross@...nel.org,
linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org,
"Luke D. Jones" <luke@...nes.dev>
Subject: [PATCH] asus-wmi: Add support for TUF laptop keyboard RGB
Adds support for TUF laptop RGB control. This creates two sysfs
paths to add control of basic keyboard LEDs, and power states.
/sys/devices/platform/asus-nb-wmi/tuf_krgb_mode has the following
as input options via U8 "n n n n n n":
- Save or set, if set, then settings revert on cold boot
- Mode, 0-8 for regular modes (if supported), 10-12 for "warning" styles
- Red, 0-255
- Green, 0-255
- Blue, 0-255
- Speed, 0 = Slow, 1 = Medium, 2 = Fast
/sys/devices/platform/asus-nb-wmi/tuf_krgb_state has the following
as input options via boolean "b b b b b":
- Save or set, if set, then settings revert on cold boot
- Boot, if true, the keyboard displays animation on boot
- Awake, if true, the keyboard LED's are on while device is awake
- Sleep, if true, the keyboard shows animation while device is suspended
- Keybaord, appears to have no effect
Signed-off-by: Luke D. Jones <luke@...nes.dev>
---
drivers/platform/x86/asus-wmi.c | 168 +++++++++++++++++++++
include/linux/platform_data/x86/asus-wmi.h | 6 +
2 files changed, 174 insertions(+)
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 62ce198a3463..09277bd98249 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -234,6 +234,9 @@ struct asus_wmi {
bool dgpu_disable_available;
bool dgpu_disable;
+ bool tuf_kb_rgb_mode_available;
+ bool tuf_kb_rgb_state_available;
+
bool throttle_thermal_policy_available;
u8 throttle_thermal_policy_mode;
@@ -734,6 +737,153 @@ static ssize_t egpu_enable_store(struct device *dev,
static DEVICE_ATTR_RW(egpu_enable);
+/* TUF Laptop Keyboard RGB Modes **********************************************/
+static int tuf_kb_rgb_mode_check_present(struct asus_wmi *asus)
+{
+ u32 result;
+ int err;
+
+ asus->tuf_kb_rgb_mode_available = false;
+
+ err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_TUF_RGB_MODE, &result);
+ if (err) {
+ if (err == -ENODEV)
+ return 0;
+ return err;
+ }
+
+ if (result & ASUS_WMI_DSTS_PRESENCE_BIT)
+ asus->tuf_kb_rgb_mode_available = true;
+
+ return 0;
+}
+
+static ssize_t tuf_kb_rgb_mode_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int err;
+ u32 ret;
+ u8 res, tmp, arg_num;
+ char *data, *part, *end;
+ u8 cmd, mode, r, g, b, speed;
+
+ data = end = kstrdup(buf, GFP_KERNEL);
+ cmd = mode = r = g = b = speed = arg_num = 0;
+
+ while ((part = strsep(&end, " ")) != NULL) {
+ if (part == NULL)
+ return -1;
+
+ res = kstrtou8(part, 10, &tmp);
+ if (res)
+ return -1;
+
+ if (arg_num == 0)
+ // apply : set
+ cmd = tmp == 1 ? 0xb5 : 0xb4;
+ else if (arg_num == 1)
+ // From 0-8 are valid modes with 10-12 being "warning"
+ // style modes. All models have "pulse" mode 10.
+ mode = (tmp <= 12 && tmp != 9) ? tmp : 10;
+ else if (arg_num == 2)
+ r = tmp;
+ else if (arg_num == 3)
+ g = tmp;
+ else if (arg_num == 4)
+ b = tmp;
+ else if (arg_num == 5) {
+ if (tmp == 0)
+ speed = 0xe1;
+ else if (tmp == 1)
+ speed = 0xeb;
+ else if (tmp == 2)
+ speed = 0xf5;
+ }
+
+ arg_num += 1;
+ }
+
+ err = asus_wmi_evaluate_method3(ASUS_WMI_METHODID_DEVS, ASUS_WMI_DEVID_TUF_RGB_MODE,
+ cmd | (mode << 8) | (r << 16) | (g << 24), (b) | (speed << 8), &ret);
+ if (err)
+ return err;
+
+ kfree(data);
+ return count;
+}
+
+static DEVICE_ATTR_WO(tuf_kb_rgb_mode);
+
+/* TUF Laptop Keyboard RGB States *********************************************/
+static int tuf_kb_rgb_state_check_present(struct asus_wmi *asus)
+{
+ u32 result;
+ int err;
+
+ asus->tuf_kb_rgb_state_available = false;
+
+ err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_TUF_RGB_STATE, &result);
+ if (err) {
+ if (err == -ENODEV)
+ return 0;
+ return err;
+ }
+
+ if (result & ASUS_WMI_DSTS_PRESENCE_BIT)
+ asus->tuf_kb_rgb_state_available = true;
+
+ return 0;
+}
+
+static ssize_t tuf_kb_rgb_state_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int err;
+ u32 ret;
+ bool tmp;
+ char *data, *part, *end;
+ u8 save, flags, res, arg_num;
+
+ save = flags = arg_num = 0;
+ data = end = kstrdup(buf, GFP_KERNEL);
+
+ while ((part = strsep(&end, " ")) != NULL) {
+ if (part == NULL)
+ return -1;
+
+ res = kstrtobool(part, &tmp);
+ if (res)
+ return -1;
+
+ if (tmp) {
+ if (arg_num == 0) // save : set
+ save = tmp == 0 ? 0x0100 : 0x0000;
+ else if (arg_num == 1)
+ flags |= 0x02; // boot
+ else if (arg_num == 2)
+ flags |= 0x08; // awake
+ else if (arg_num == 3)
+ flags |= 0x20; // sleep
+ else if (arg_num == 4)
+ flags |= 0x80; // keyboard
+ }
+
+ arg_num += 1;
+ }
+
+ err = asus_wmi_evaluate_method3(ASUS_WMI_METHODID_DEVS,
+ ASUS_WMI_DEVID_TUF_RGB_STATE, 0xBD | save | (flags << 16), 0, &ret);
+ if (err)
+ return err;
+
+ kfree(data);
+ return count;
+}
+
+static DEVICE_ATTR_WO(tuf_kb_rgb_state);
+
/* Battery ********************************************************************/
/* The battery maximum charging percentage */
@@ -3258,6 +3408,8 @@ static struct attribute *platform_attributes[] = {
&dev_attr_touchpad.attr,
&dev_attr_egpu_enable.attr,
&dev_attr_dgpu_disable.attr,
+ &dev_attr_tuf_kb_rgb_mode.attr,
+ &dev_attr_tuf_kb_rgb_state.attr,
&dev_attr_lid_resume.attr,
&dev_attr_als_enable.attr,
&dev_attr_fan_boost_mode.attr,
@@ -3286,6 +3438,12 @@ static umode_t asus_sysfs_is_visible(struct kobject *kobj,
devid = ASUS_WMI_DEVID_ALS_ENABLE;
else if (attr == &dev_attr_egpu_enable.attr)
ok = asus->egpu_enable_available;
+ else if (attr == &dev_attr_tuf_kb_rgb_mode.attr)
+ ok = asus->tuf_kb_rgb_mode_available;
+ else if (attr == &dev_attr_tuf_kb_rgb_state.attr)
+ ok = asus->tuf_kb_rgb_state_available;
+ else if (attr == &dev_attr_dgpu_disable.attr)
+ ok = asus->dgpu_disable_available;
else if (attr == &dev_attr_dgpu_disable.attr)
ok = asus->dgpu_disable_available;
else if (attr == &dev_attr_fan_boost_mode.attr)
@@ -3557,6 +3715,14 @@ static int asus_wmi_add(struct platform_device *pdev)
if (err)
goto fail_dgpu_disable;
+ err = tuf_kb_rgb_mode_check_present(asus);
+ if (err)
+ goto fail_tuf_kb_rgb_mode;
+
+ err = tuf_kb_rgb_state_check_present(asus);
+ if (err)
+ goto fail_tuf_kb_rgb_state;
+
err = fan_boost_mode_check_present(asus);
if (err)
goto fail_fan_boost_mode;
@@ -3671,6 +3837,8 @@ static int asus_wmi_add(struct platform_device *pdev)
fail_fan_boost_mode:
fail_egpu_enable:
fail_dgpu_disable:
+fail_tuf_kb_rgb_mode:
+fail_tuf_kb_rgb_state:
fail_platform:
fail_panel_od:
kfree(asus);
diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h
index a571b47ff362..af4191fb0508 100644
--- a/include/linux/platform_data/x86/asus-wmi.h
+++ b/include/linux/platform_data/x86/asus-wmi.h
@@ -98,6 +98,12 @@
/* dgpu on/off */
#define ASUS_WMI_DEVID_DGPU 0x00090020
+/* TUF laptop RGB modes/colours */
+#define ASUS_WMI_DEVID_TUF_RGB_MODE 0x00100056
+
+/* TUF laptop RGB power/state */
+#define ASUS_WMI_DEVID_TUF_RGB_STATE 0x00100057
+
/* DSTS masks */
#define ASUS_WMI_DSTS_STATUS_BIT 0x00000001
#define ASUS_WMI_DSTS_UNKNOWN_BIT 0x00000002
--
2.37.1
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