Patch "platform/x86: ideapad-laptop: Add allow_v4_dytc module parameter" has been added to the 5.18-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    platform/x86: ideapad-laptop: Add allow_v4_dytc module parameter

to the 5.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     platform-x86-ideapad-laptop-add-allow_v4_dytc-module.patch
and it can be found in the queue-5.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit bd90f0433abf1e9b2fa971226d5f880d1664a336
Author: Hans de Goede <hdegoede@xxxxxxxxxx>
Date:   Thu Jun 23 13:59:14 2022 +0200

    platform/x86: ideapad-laptop: Add allow_v4_dytc module parameter
    
    [ Upstream commit a27a1e35f5c87463ba7c12d5b7d7cbafbefc9213 ]
    
    Add an allow_v4_dytc module parameter to allow users to easily test if
    DYTC version 4 platform-profiles work on their laptop.
    
    Fixes: 599482c58ebd ("platform/x86: ideapad-laptop: Add platform support for Ideapad 5 Pro 16ACH6-82L5")
    Link: https://bugzilla.kernel.org/show_bug.cgi?id=213297
    Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20220623115914.103001-1-hdegoede@xxxxxxxxxx
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
index 6b472fd431d0..abd0c81d62c4 100644
--- a/drivers/platform/x86/ideapad-laptop.c
+++ b/drivers/platform/x86/ideapad-laptop.c
@@ -152,6 +152,10 @@ static bool no_bt_rfkill;
 module_param(no_bt_rfkill, bool, 0444);
 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
 
+static bool allow_v4_dytc;
+module_param(allow_v4_dytc, bool, 0444);
+MODULE_PARM_DESC(allow_v4_dytc, "Enable DYTC version 4 platform-profile support.");
+
 /*
  * ACPI Helpers
  */
@@ -907,13 +911,16 @@ static int ideapad_dytc_profile_init(struct ideapad_private *priv)
 
 	dytc_version = (output >> DYTC_QUERY_REV_BIT) & 0xF;
 
-	if (dytc_version < 5) {
-		if (dytc_version < 4 || !dmi_check_system(ideapad_dytc_v4_allow_table)) {
-			dev_info(&priv->platform_device->dev,
-				 "DYTC_VERSION is less than 4 or is not allowed: %d\n",
-				 dytc_version);
-			return -ENODEV;
-		}
+	if (dytc_version < 4) {
+		dev_info(&priv->platform_device->dev, "DYTC_VERSION < 4 is not supported\n");
+		return -ENODEV;
+	}
+
+	if (dytc_version < 5 &&
+	    !(allow_v4_dytc || dmi_check_system(ideapad_dytc_v4_allow_table))) {
+		dev_info(&priv->platform_device->dev,
+			 "DYTC_VERSION 4 support may not work. Pass ideapad_laptop.allow_v4_dytc=Y on the kernel commandline to enable\n");
+		return -ENODEV;
 	}
 
 	priv->dytc = kzalloc(sizeof(*priv->dytc), GFP_KERNEL);