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@xxxxxxxxxx>
Reviewed-by: Mario Limonciello <mario.limonciello@xxxxxxx>
---
drivers/platform/x86/asus-armoury.c | 114 +++++++++++++++++++++
include/linux/platform_data/x86/asus-wmi.h | 1 +
2 files changed, 115 insertions(+)
diff --git a/drivers/platform/x86/asus-armoury.c b/drivers/platform/x86/asus-armoury.c
index 2a9f4b626f12..c4c79a33c56e 100644
--- a/drivers/platform/x86/asus-armoury.c
+++ b/drivers/platform/x86/asus-armoury.c
@@ -466,6 +466,119 @@ 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_ROG_TUNABLE(ppt_pl1_spl, "ppt_pl1_spl", ASUS_WMI_DEVID_PPT_PL1_SPL, cpu_default,
cpu_min, cpu_max, 1, "Set the CPU slow package limit");
@@ -521,6 +634,7 @@ static const struct asus_attr_group armoury_attr_groups[] = {
{ &nv_temp_target_attr_group, ASUS_WMI_DEVID_NV_THERM_TARGET },
{ &dgpu_base_tgp_attr_group, ASUS_WMI_DEVID_DGPU_BASE_TGP },
{ &dgpu_tgp_attr_group, ASUS_WMI_DEVID_DGPU_SET_TGP },
+ { &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 8c755799eb60..88bf250dc8ca 100644
--- a/include/linux/platform_data/x86/asus-wmi.h
+++ b/include/linux/platform_data/x86/asus-wmi.h
@@ -139,6 +139,7 @@
#define ASUS_WMI_DEVID_DGPU_BASE_TGP 0x00120099
#define ASUS_WMI_DEVID_DGPU_SET_TGP 0x00120098
+#define ASUS_WMI_DEVID_APU_MEM 0x000600C1
/* gpu mux switch, 0 = dGPU, 1 = Optimus */
#define ASUS_WMI_DEVID_GPU_MUX 0x00090016
--
2.46.1
