linux-kernel - [PATCH 1/3] Revert "platform/x86: asus-wmi: ROG Ally increase wait time, allow MCU powersave"

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Message-ID: <20240926095344.1291013-2-luke@ljones.dev>
Date: Thu, 26 Sep 2024 21:53:42 +1200
From: "Luke D. Jones" <luke@...nes.dev>
To: linux-kernel@...r.kernel.org
Cc: platform-driver-x86@...r.kernel.org,
	ilpo.jarvinen@...ux.intel.com,
	hdegoede@...hat.com,
	corentin.chary@...il.com,
	superm1@...nel.org,
	"Luke D. Jones" <luke@...nes.dev>
Subject: [PATCH 1/3] Revert "platform/x86: asus-wmi: ROG Ally increase wait time, allow MCU powersave"

This reverts commit 7e7a5dee49732ed01a3a17c9a3edf027fb9457fe.

This is part of some hacks that are no-longer required when users have
updated their MCU firmware to the latest version:
- Ally 1: v319
- Ally X: v313

Signed-off-by: Luke D. Jones <luke@...nes.dev>
---
 drivers/platform/x86/asus-wmi.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 08861792bddd..8daefd9a0d94 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -146,7 +146,7 @@ module_param(fnlock_default, bool, 0444);
 /* Controls the power state of the USB0 hub on ROG Ally which input is on */
 #define ASUS_USB0_PWR_EC0_CSEE "\\_SB.PCI0.SBRG.EC0.CSEE"
 /* 300ms so far seems to produce a reliable result on AC and battery */
-#define ASUS_USB0_PWR_EC0_CSEE_WAIT 1500
+#define ASUS_USB0_PWR_EC0_CSEE_WAIT 300
 
 static const char * const ashs_ids[] = { "ATK4001", "ATK4002", NULL };
 
@@ -4971,7 +4971,6 @@ static int asus_hotk_resume_early(struct device *device)
 	struct asus_wmi *asus = dev_get_drvdata(device);
 
 	if (asus->ally_mcu_usb_switch) {
-		/* sleep required to prevent USB0 being yanked then reappearing rapidly */
 		if (ACPI_FAILURE(acpi_execute_simple_method(NULL, ASUS_USB0_PWR_EC0_CSEE, 0xB8)))
 			dev_err(device, "ROG Ally MCU failed to connect USB dev\n");
 		else
@@ -4983,8 +4982,17 @@ static int asus_hotk_resume_early(struct device *device)
 static int asus_hotk_prepare(struct device *device)
 {
 	struct asus_wmi *asus = dev_get_drvdata(device);
+	int result, err;
 
 	if (asus->ally_mcu_usb_switch) {
+		/* When powersave is enabled it causes many issues with resume of USB hub */
+		result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_MCU_POWERSAVE);
+		if (result == 1) {
+			dev_warn(device, "MCU powersave enabled, disabling to prevent resume issues");
+			err = asus_wmi_set_devstate(ASUS_WMI_DEVID_MCU_POWERSAVE, 0, &result);
+			if (err || result != 1)
+				dev_err(device, "Failed to set MCU powersave mode: %d\n", err);
+		}
 		/* sleep required to ensure USB0 is disabled before sleep continues */
 		if (ACPI_FAILURE(acpi_execute_simple_method(NULL, ASUS_USB0_PWR_EC0_CSEE, 0xB7)))
 			dev_err(device, "ROG Ally MCU failed to disconnect USB dev\n");
-- 
2.46.1