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Message-ID: <20250316230724.100165-5-luke@ljones.dev>
Date: Mon, 17 Mar 2025 12:07:20 +1300
From: Luke Jones <luke@...nes.dev>
To: linux-kernel@...r.kernel.org
Cc: hdegoede@...hat.com,
ilpo.jarvinen@...ux.intel.com,
platform-driver-x86@...r.kernel.org,
mario.limonciello@....com,
"Luke D. Jones" <luke@...nes.dev>
Subject: [PATCH v7 4/8] platform/x86: asus-armoury: add apu-mem control support
From: "Luke D. Jones" <luke@...nes.dev>
Implement the APU memory size control under the asus-armoury module using
the fw_attributes class.
This allows the APU allocated memory size to be adjusted depending on
the users priority. A reboot is required after change.
Signed-off-by: Luke D. Jones <luke@...nes.dev>
Reviewed-by: Mario Limonciello <mario.limonciello@....com>
---
drivers/platform/x86/asus-armoury.c | 114 +++++++++++++++++++++
include/linux/platform_data/x86/asus-wmi.h | 2 +
2 files changed, 116 insertions(+)
diff --git a/drivers/platform/x86/asus-armoury.c b/drivers/platform/x86/asus-armoury.c
index 449b2605b7e6..882376008093 100644
--- a/drivers/platform/x86/asus-armoury.c
+++ b/drivers/platform/x86/asus-armoury.c
@@ -389,6 +389,119 @@ static ssize_t egpu_enable_current_value_store(struct kobject *kobj, struct kobj
WMI_SHOW_INT(egpu_enable_current_value, "%d\n", ASUS_WMI_DEVID_EGPU);
ATTR_GROUP_BOOL_CUSTOM(egpu_enable, "egpu_enable", "Enable the eGPU (also disables dGPU)");
+/* Device memory available to APU */
+
+static ssize_t apu_mem_current_value_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ int err;
+ u32 mem;
+
+ err = asus_wmi_get_devstate_dsts(ASUS_WMI_DEVID_APU_MEM, &mem);
+ if (err)
+ return err;
+
+ switch (mem) {
+ case 0x100:
+ mem = 0;
+ break;
+ case 0x102:
+ mem = 1;
+ break;
+ case 0x103:
+ mem = 2;
+ break;
+ case 0x104:
+ mem = 3;
+ break;
+ case 0x105:
+ mem = 4;
+ break;
+ case 0x106:
+ /* This is out of order and looks wrong but is correct */
+ mem = 8;
+ break;
+ case 0x107:
+ mem = 5;
+ break;
+ case 0x108:
+ mem = 6;
+ break;
+ case 0x109:
+ mem = 7;
+ break;
+ default:
+ mem = 4;
+ break;
+ }
+
+ return sysfs_emit(buf, "%u\n", mem);
+}
+
+static ssize_t apu_mem_current_value_store(struct kobject *kobj, struct kobj_attribute *attr,
+ const char *buf, size_t count)
+{
+ int result, err;
+ u32 requested, mem;
+
+ result = kstrtou32(buf, 10, &requested);
+ if (result)
+ return result;
+
+ switch (requested) {
+ case 0:
+ mem = 0x000;
+ break;
+ case 1:
+ mem = 0x102;
+ break;
+ case 2:
+ mem = 0x103;
+ break;
+ case 3:
+ mem = 0x104;
+ break;
+ case 4:
+ mem = 0x105;
+ break;
+ case 5:
+ mem = 0x107;
+ break;
+ case 6:
+ mem = 0x108;
+ break;
+ case 7:
+ mem = 0x109;
+ break;
+ case 8:
+ /* This is out of order and looks wrong but is correct */
+ mem = 0x106;
+ break;
+ default:
+ return -EIO;
+ }
+
+ err = asus_wmi_set_devstate(ASUS_WMI_DEVID_APU_MEM, mem, &result);
+ if (err) {
+ pr_warn("Failed to set apu_mem: %d\n", err);
+ return err;
+ }
+
+ pr_info("APU memory changed to %uGB, reboot required\n", requested);
+ sysfs_notify(kobj, NULL, attr->attr.name);
+
+ asus_set_reboot_and_signal_event();
+
+ return count;
+}
+
+static ssize_t apu_mem_possible_values_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ return sysfs_emit(buf, "0;1;2;3;4;5;6;7;8\n");
+}
+ATTR_GROUP_ENUM_CUSTOM(apu_mem, "apu_mem", "Set available system RAM (in GB) for the APU to use");
+
/* Simple attribute creation */
ATTR_GROUP_ENUM_INT_RO(charge_mode, "charge_mode", ASUS_WMI_DEVID_CHARGE_MODE, "0;1;2",
"Show the current mode of charging");
@@ -409,6 +522,7 @@ static const struct asus_attr_group armoury_attr_groups[] = {
{ &egpu_connected_attr_group, ASUS_WMI_DEVID_EGPU_CONNECTED },
{ &egpu_enable_attr_group, ASUS_WMI_DEVID_EGPU },
{ &dgpu_disable_attr_group, ASUS_WMI_DEVID_DGPU },
+ { &apu_mem_attr_group, ASUS_WMI_DEVID_APU_MEM },
{ &charge_mode_attr_group, ASUS_WMI_DEVID_CHARGE_MODE },
{ &boot_sound_attr_group, ASUS_WMI_DEVID_BOOT_SOUND },
diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h
index 62a9adb1af2f..f3494a9efea7 100644
--- a/include/linux/platform_data/x86/asus-wmi.h
+++ b/include/linux/platform_data/x86/asus-wmi.h
@@ -137,6 +137,8 @@
/* dgpu on/off */
#define ASUS_WMI_DEVID_DGPU 0x00090020
+#define ASUS_WMI_DEVID_APU_MEM 0x000600C1
+
/* gpu mux switch, 0 = dGPU, 1 = Optimus */
#define ASUS_WMI_DEVID_GPU_MUX 0x00090016
#define ASUS_WMI_DEVID_GPU_MUX_VIVO 0x00090026
--
2.48.1
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