Implement the APU memory size control under the asus-bioscfg 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>
---
drivers/platform/x86/asus-bioscfg.c | 116 +++++++++++++++++++++
include/linux/platform_data/x86/asus-wmi.h | 1 +
2 files changed, 117 insertions(+)
diff --git a/drivers/platform/x86/asus-bioscfg.c b/drivers/platform/x86/asus-bioscfg.c
index 551b7dbd8fe7..57efe50e0d19 100644
--- a/drivers/platform/x86/asus-bioscfg.c
+++ b/drivers/platform/x86/asus-bioscfg.c
@@ -426,6 +426,120 @@ static ssize_t egpu_enable_current_value_store(struct kobject *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 256:
+ mem = 0;
+ break;
+ case 258:
+ mem = 1;
+ break;
+ case 259:
+ mem = 2;
+ break;
+ case 260:
+ mem = 3;
+ break;
+ case 261:
+ mem = 4;
+ break;
+ case 262:
+ /* This is out of order and looks wrong but is correct */
+ mem = 8;
+ break;
+ case 263:
+ mem = 5;
+ break;
+ case 264:
+ mem = 6;
+ break;
+ case 265:
+ mem = 7;
+ break;
+ default:
+ mem = 4;
+ break;
+ }
+
+ return sysfs_emit(buf, "%d\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 = 0;
+ break;
+ case 1:
+ mem = 258;
+ break;
+ case 2:
+ mem = 259;
+ break;
+ case 3:
+ mem = 260;
+ break;
+ case 4:
+ mem = 261;
+ break;
+ case 5:
+ mem = 263;
+ break;
+ case 6:
+ mem = 264;
+ break;
+ case 7:
+ mem = 265;
+ break;
+ case 8:
+ /* This is outof order and looks wrong but is correct */
+ mem = 262;
+ 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 %dGB, 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 the available system memory for the APU to use");
+
/* Simple attribute creation */
ATTR_GROUP_ENUM_INT_RW(thermal_policy, "thermal_policy", ASUS_WMI_DEVID_THROTTLE_THERMAL_POLICY,
0, 3, "0;1;2", "Set the thermal profile: 0=normal, 1=performance, 2=quiet");
@@ -543,6 +657,8 @@ static int asus_fw_attr_add(void)
sysfs_create_group(&asus_bioscfg.fw_attr_kset->kobj, &dgpu_base_tgp_attr_group);
if (asus_wmi_is_present(ASUS_WMI_DEVID_DGPU_SET_TGP))
sysfs_create_group(&asus_bioscfg.fw_attr_kset->kobj, &dgpu_tgp_attr_group);
+ if (asus_wmi_is_present(ASUS_WMI_DEVID_APU_MEM))
+ sysfs_create_group(&asus_bioscfg.fw_attr_kset->kobj, &apu_mem_attr_group);
if (asus_wmi_is_present(ASUS_WMI_DEVID_CHARGE_MODE))
sysfs_create_group(&asus_bioscfg.fw_attr_kset->kobj, &charge_mode_attr_group);
diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h
index c54264653d75..e3d511918416 100644
--- a/include/linux/platform_data/x86/asus-wmi.h
+++ b/include/linux/platform_data/x86/asus-wmi.h
@@ -130,6 +130,7 @@
#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
--
2.45.2
