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Jones" To: hdegoede@redhat.com Cc: markgross@kernel.org, platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org, "Luke D. Jones" Subject: [PATCH] asus-wmi: Add support for TUF laptop keyboard RGB Date: Thu, 4 Aug 2022 11:16:31 +1200 Message-Id: <20220803231631.49924-1-luke@ljones.dev> X-Mailer: git-send-email 2.37.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org Adds support for TUF laptop RGB control. This adds a multicolor LED device, and two sysfs paths for extra feature control. /sys/devices/platform/asus-nb-wmi/tuf_krgb_mode_index provides labels for the index fields as "save mode speed" /sys/devices/platform/asus-nb-wmi/tuf_krgb_mode has the following as input options via U8 "n n n": - Save or set, if set, then settings revert on cold boot - Mode, 0 = Static, 1 = Breathe, 2 = Colour cycle, 3 = Pulse - Speed, 0 = Slow, 1 = Medium, 2 = Fast Signed-off-by: Luke D. Jones --- drivers/platform/x86/asus-wmi.c | 213 +++++++++++++++++++++ include/linux/platform_data/x86/asus-wmi.h | 3 + 2 files changed, 216 insertions(+) diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c index 0e7fbed8a50d..2959f17047a8 100644 --- a/drivers/platform/x86/asus-wmi.c +++ b/drivers/platform/x86/asus-wmi.c @@ -25,6 +25,7 @@ #include #include #include +#include #include #include #include @@ -117,6 +118,9 @@ static const char * const ashs_ids[] = { "ATK4001", "ATK4002", NULL }; static int throttle_thermal_policy_write(struct asus_wmi *); +static int tuf_rgb_brightness_set(struct led_classdev *cdev, + enum led_brightness brightness); + static bool ashs_present(void) { int i = 0; @@ -190,6 +194,14 @@ struct fan_curve_data { u8 percents[FAN_CURVE_POINTS]; }; +struct tuf_rgb_led { + struct led_classdev_mc dev; + struct mc_subled subled_info[3]; /* r g b */ + u8 save; + u8 mode; + u8 speed; +}; + struct asus_wmi { int dsts_id; int spec; @@ -234,6 +246,9 @@ struct asus_wmi { bool dgpu_disable_available; bool dgpu_disable; + bool tuf_krgb_mode_available; + struct tuf_rgb_led tuf_krgb_mode; + bool throttle_thermal_policy_available; u8 throttle_thermal_policy_mode; @@ -734,6 +749,116 @@ static ssize_t egpu_enable_store(struct device *dev, static DEVICE_ATTR_RW(egpu_enable); +/* TUF Laptop Keyboard RGB Modes **********************************************/ +static int tuf_krgb_mode_check_present(struct asus_wmi *asus) +{ + u32 result; + int err; + + asus->tuf_krgb_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_krgb_mode_available = true; + /* set some sane defaults since we can't read this from WMI */ + asus->tuf_krgb_mode.save = 1; + asus->tuf_krgb_mode.mode = 0; + asus->tuf_krgb_mode.speed = 1; + } + + return 0; +} + +static ssize_t tuf_krgb_mode_store(struct device *device, + struct device_attribute *attr, + const char *buf, size_t count) +{ + char *data, *part, *end; + u8 res, tmp, arg_num; + int err; + + struct asus_wmi *asus = dev_get_drvdata(device); + struct led_classdev *cdev = &asus->tuf_krgb_mode.dev.led_cdev; + + data = end = kstrdup(buf, GFP_KERNEL); + 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) + asus->tuf_krgb_mode.save = tmp; + else if (arg_num == 1) + /* These are the known usable modes across all TUF/ROG */ + asus->tuf_krgb_mode.mode = tmp < 12 && tmp != 9 ? tmp : 0x0a; + else if (arg_num == 2) { + if (tmp == 0) + asus->tuf_krgb_mode.speed = 0xe1; + else if (tmp == 1) + asus->tuf_krgb_mode.speed = 0xeb; + else if (tmp == 2) + asus->tuf_krgb_mode.speed = 0xf5; + else + asus->tuf_krgb_mode.speed = 0xeb; + } + + arg_num += 1; + } + + err = tuf_rgb_brightness_set(cdev, cdev->brightness); + if (err) + return err; + return 0; +} + +static ssize_t tuf_krgb_mode_show(struct device *device, + struct device_attribute *attr, + char *buf) +{ + struct asus_wmi *asus = dev_get_drvdata(device); + u8 speed = asus->tuf_krgb_mode.speed; + int len; + + if (speed == 0xe1) + speed = 0; + else if (speed == 0xeb) + speed = 1; + else if (speed == 0xf5) + speed = 2; + else + speed = 1; + + len = sprintf(buf, "%d %d %d", + asus->tuf_krgb_mode.save, + asus->tuf_krgb_mode.mode, + speed); + + return len; +} + +static DEVICE_ATTR_RW(tuf_krgb_mode); + +static ssize_t tuf_krgb_mode_index_show(struct device *device, + struct device_attribute *attr, + char *buf) +{ + int len = sprintf(buf, "%s", "save mode speed\n"); + return len; +} + +static DEVICE_ATTR_RO(tuf_krgb_mode_index); + /* Battery ********************************************************************/ /* The battery maximum charging percentage */ @@ -1028,6 +1153,38 @@ static enum led_brightness lightbar_led_get(struct led_classdev *led_cdev) return result & ASUS_WMI_DSTS_LIGHTBAR_MASK; } +static int tuf_rgb_brightness_set(struct led_classdev *cdev, + enum led_brightness brightness) +{ + u8 r, g, b, mode, speed, save; + int err; + u32 ret; + struct led_classdev_mc *mc_cdev = lcdev_to_mccdev(cdev); + struct asus_wmi *asus = container_of(mc_cdev, struct asus_wmi, tuf_krgb_mode.dev); + + led_mc_calc_color_components(mc_cdev, brightness); + r = mc_cdev->subled_info[0].brightness; + g = mc_cdev->subled_info[1].brightness; + b = mc_cdev->subled_info[2].brightness; + /* 0 still sets the mode/rgb, but does not stick on reboot */ + save = asus->tuf_krgb_mode.save == 1 ? 0xb5 : 0xb4; + mode = asus->tuf_krgb_mode.mode; + speed = asus->tuf_krgb_mode.speed; + + err = asus_wmi_evaluate_method3(ASUS_WMI_METHODID_DEVS, ASUS_WMI_DEVID_TUF_RGB_MODE, + save | (mode << 8) | (r << 16) | (g << 24), (b) | (speed << 8), &ret); + if (err) { + pr_err("Unable to set TUF RGB data?\n"); + return err; + } + return 0; +} + +static enum led_brightness tuf_rgb_brightness_get(struct led_classdev *cdev) +{ + return cdev->brightness; +} + static void asus_wmi_led_exit(struct asus_wmi *asus) { led_classdev_unregister(&asus->kbd_led); @@ -1105,6 +1262,51 @@ static int asus_wmi_led_init(struct asus_wmi *asus) &asus->lightbar_led); } + if (asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_TUF_RGB_MODE)) { + struct led_classdev_mc *mc_cdev; + struct mc_subled *mc_led_info; + u8 brightness = 127; + + mc_cdev = &asus->tuf_krgb_mode.dev; + + mc_cdev->led_cdev.name = "asus::multicolour"; + mc_cdev->led_cdev.flags = LED_CORE_SUSPENDRESUME | LED_RETAIN_AT_SHUTDOWN; + mc_cdev->led_cdev.brightness_set_blocking = tuf_rgb_brightness_set; + mc_cdev->led_cdev.brightness_get = tuf_rgb_brightness_get; + + /* Let the multicolour LED own the info */ + mc_led_info = devm_kmalloc_array( + &asus->platform_device->dev, + 3, + sizeof(*mc_led_info), + GFP_KERNEL | __GFP_ZERO); + + if (!mc_led_info) + return -ENOMEM; + + mc_led_info[0].color_index = LED_COLOR_ID_RED; + mc_led_info[1].color_index = LED_COLOR_ID_GREEN; + mc_led_info[2].color_index = LED_COLOR_ID_BLUE; + + /* It's not possible to get last set data from device so set defaults */ + asus->tuf_krgb_mode.save = 1; + asus->tuf_krgb_mode.mode = 0; + asus->tuf_krgb_mode.speed = 1; + mc_cdev->led_cdev.brightness = brightness; + mc_cdev->led_cdev.max_brightness = brightness; + mc_led_info[0].intensity = brightness; + mc_led_info[0].brightness = mc_cdev->led_cdev.brightness; + mc_led_info[1].brightness = mc_cdev->led_cdev.brightness; + mc_led_info[2].brightness = mc_cdev->led_cdev.brightness; + led_mc_calc_color_components(mc_cdev, brightness); + + mc_cdev->subled_info = mc_led_info; + mc_cdev->num_colors = 3; + + tuf_rgb_brightness_set(&mc_cdev->led_cdev, brightness); + rv = led_classdev_multicolor_register(&asus->platform_device->dev, mc_cdev); + } + error: if (rv) asus_wmi_led_exit(asus); @@ -3258,6 +3460,8 @@ static struct attribute *platform_attributes[] = { &dev_attr_touchpad.attr, &dev_attr_egpu_enable.attr, &dev_attr_dgpu_disable.attr, + &dev_attr_tuf_krgb_mode.attr, + &dev_attr_tuf_krgb_mode_index.attr, &dev_attr_lid_resume.attr, &dev_attr_als_enable.attr, &dev_attr_fan_boost_mode.attr, @@ -3288,6 +3492,10 @@ static umode_t asus_sysfs_is_visible(struct kobject *kobj, ok = asus->egpu_enable_available; else if (attr == &dev_attr_dgpu_disable.attr) ok = asus->dgpu_disable_available; + else if (attr == &dev_attr_tuf_krgb_mode.attr) + ok = asus->tuf_krgb_mode_available; + else if (attr == &dev_attr_tuf_krgb_mode_index.attr) + ok = asus->tuf_krgb_mode_available; else if (attr == &dev_attr_fan_boost_mode.attr) ok = asus->fan_boost_mode_available; else if (attr == &dev_attr_throttle_thermal_policy.attr) @@ -3557,6 +3765,10 @@ static int asus_wmi_add(struct platform_device *pdev) if (err) goto fail_dgpu_disable; + err = tuf_krgb_mode_check_present(asus); + if (err) + goto fail_tuf_krgb_mode; + err = fan_boost_mode_check_present(asus); if (err) goto fail_fan_boost_mode; @@ -3671,6 +3883,7 @@ static int asus_wmi_add(struct platform_device *pdev) fail_fan_boost_mode: fail_egpu_enable: fail_dgpu_disable: +fail_tuf_krgb_mode: 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..5049c153a3fe 100644 --- a/include/linux/platform_data/x86/asus-wmi.h +++ b/include/linux/platform_data/x86/asus-wmi.h @@ -98,6 +98,9 @@ /* dgpu on/off */ #define ASUS_WMI_DEVID_DGPU 0x00090020 +/* TUF laptop RGB modes */ +#define ASUS_WMI_DEVID_TUF_RGB_MODE 0x00100056 + /* DSTS masks */ #define ASUS_WMI_DSTS_STATUS_BIT 0x00000001 #define ASUS_WMI_DSTS_UNKNOWN_BIT 0x00000002 -- 2.37.1