platform/x86: asus-wmi: Fix setting RGB mode on some TUF laptops

[ Upstream commit 6a758a3e831ce1a84c9c209ac6dc755f4c8ce77a ]

This patch fixes setting the cmd values to 0xb3 and 0xb4.
This is necessary on some TUF laptops in order to set the RGB mode.

Closes: https://lore.kernel.org/platform-driver-x86/443078148.491022.1677576298133@nm83.abv.bg
Signed-off-by: Kristian Angelov <kristiana2000@abv.bg>
Reviewed-by: Luke D. Jones <luke@ljones.dev>
Link: https://lore.kernel.org/r/ZLlS7o6UdTUBkyqa@wyvern.localdomain
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 1038dfdcdd3250dc24a0e6d95ad9c7e4ae3196d5..8bef66a2f0ce76ad29a55ae5e9aa840e9490d77a 100644 (file)
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -738,13 +738,23 @@ static ssize_t kbd_rgb_mode_store(struct device *dev,
                                 struct device_attribute *attr,
                                 const char *buf, size_t count)
 {
-       u32 cmd, mode, r, g,  b,  speed;
+       u32 cmd, mode, r, g, b, speed;
        int err;
 
        if (sscanf(buf, "%d %d %d %d %d %d", &cmd, &mode, &r, &g, &b, &speed) != 6)
                return -EINVAL;
 
-       cmd = !!cmd;
+       /* B3 is set and B4 is save to BIOS */
+       switch (cmd) {
+       case 0:
+               cmd = 0xb3;
+               break;
+       case 1:
+               cmd = 0xb4;
+               break;
+       default:
+               return -EINVAL;
+       }
 
        /* These are the known usable modes across all TUF/ROG */
        if (mode >= 12 || mode == 9)