linux-kernel - [PATCH AUTOSEL 6.1 35/47] platform/x86: asus-wmi: Fix setting RGB mode on some TUF laptops

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Message-Id: <20230813160006.1073695-35-sashal@kernel.org>
Date:   Sun, 13 Aug 2023 11:59:30 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Kristian Angelov <kristiana2000@....bg>,
        "Luke D . Jones" <luke@...nes.dev>,
        Hans de Goede <hdegoede@...hat.com>,
        Sasha Levin <sashal@...nel.org>, corentin.chary@...il.com,
        markgross@...nel.org, acpi4asus-user@...ts.sourceforge.net,
        platform-driver-x86@...r.kernel.org
Subject: [PATCH AUTOSEL 6.1 35/47] platform/x86: asus-wmi: Fix setting RGB mode on some TUF laptops

From: Kristian Angelov <kristiana2000@....bg>

[ 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@....bg>
Reviewed-by: Luke D. Jones <luke@...nes.dev>
Link: https://lore.kernel.org/r/ZLlS7o6UdTUBkyqa@wyvern.localdomain
Reviewed-by: Hans de Goede <hdegoede@...hat.com>
Signed-off-by: Hans de Goede <hdegoede@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/platform/x86/asus-wmi.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 02bf286924183..36effe04c6f33 100644
--- 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)
-- 
2.40.1