[PATCH v3 4/6] platform/x86: lenovo-wmi-other: Add GPU tunable attributes

Derek J. Clark
2026-02-24T04:32:10Z

Use an enum for all GPU attribute feature ID's and add GPU attributes.

Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Signed-off-by: Derek J. Clark <derekjohn.clark@gmail.com>
---
.../wmi/devices/lenovo-wmi-other.rst | 11 ++
drivers/platform/x86/lenovo/wmi-capdata.h | 1 +
drivers/platform/x86/lenovo/wmi-other.c | 105 ++++++++++++++++++
3 files changed, 117 insertions(+)

diff --git a/Documentation/wmi/devices/lenovo-wmi-other.rst b/Documentation/wmi/devices/lenovo-wmi-other.rst
index f4763ed66cc6..f7564b23bb7f 100644
--- a/Documentation/wmi/devices/lenovo-wmi-other.rst
+++ b/Documentation/wmi/devices/lenovo-wmi-other.rst
@@ -70,6 +70,17 @@ Each attribute has the following properties:
The following firmware-attributes are implemented:
- cpu_oc_stat: CPU Overlocking Status
- cpu_temp: CPU Thermal Load Limit
+ - dgpu_boost_clk: Dedicated GPU Boost Clock
+ - dgpu_enable: Dedicated GPU Enabled Status
+ - gpu_didvid: GPU Device Identifier and Vendor Identifier
+ - gpu_mode: GPU Mode by Power Limit
+ - gpu_nv_ac_offset: Nvidia GPU AC Total Processing Power Baseline Offset
+ - gpu_nv_bpl: Nvidia GPU Base Power Limit
+ - gpu_nv_cpu_boost: Nvidia GPU to CPU Dynamic Boost Limit
+ - gpu_nv_ctgp: Nvidia GPU Configurable Total Graphics Power
+ - gpu_nv_ppab: Nvidia GPU Power Performance Aware Boost Limit
+ - gpu_oc_stat: GPU Overclocking Status
+ - gpu_temp: GPU Thermal Load Limit
- ppt_cpu_cl: CPU Cross Loading Power Limit
- ppt_pl1_apu_spl: Platform Profile Tracking APU Sustained Power Limit
- ppt_pl1_spl: Platform Profile Tracking Sustained Power Limit
diff --git a/drivers/platform/x86/lenovo/wmi-capdata.h b/drivers/platform/x86/lenovo/wmi-capdata.h
index aa48f43cbb43..b7f9ee7b301a 100644
--- a/drivers/platform/x86/lenovo/wmi-capdata.h
+++ b/drivers/platform/x86/lenovo/wmi-capdata.h
@@ -25,6 +25,7 @@

enum lwmi_device_id {
LWMI_DEVICE_ID_CPU = 0x01,
+ LWMI_DEVICE_ID_GPU = 0x02,
LWMI_DEVICE_ID_FAN = 0x04,
};

diff --git a/drivers/platform/x86/lenovo/wmi-other.c b/drivers/platform/x86/lenovo/wmi-other.c
index 87aba244da84..67768f6a50e0 100644
--- a/drivers/platform/x86/lenovo/wmi-other.c
+++ b/drivers/platform/x86/lenovo/wmi-other.c
@@ -65,6 +65,19 @@ enum lwmi_feature_id_cpu {
LWMI_FEATURE_ID_CPU_IPL = 0x09,
};

+enum lwmi_feature_id_gpu {
+ LWMI_FEATURE_ID_GPU_NV_PPAB = 0x01,
+ LWMI_FEATURE_ID_GPU_NV_CTGP = 0x02,
+ LWMI_FEATURE_ID_GPU_TEMP = 0x03,
+ LWMI_FEATURE_ID_GPU_AC_OFFSET = 0x04,
+ LWMI_FEATURE_ID_DGPU_BOOST_CLK = 0x06,
+ LWMI_FEATURE_ID_DGPU_EN = 0x07,
+ LWMI_FEATURE_ID_GPU_MODE = 0x08,
+ LWMI_FEATURE_ID_DGPU_DIDVID = 0x09,
+ LWMI_FEATURE_ID_GPU_NV_BPL = 0x0a,
+ LWMI_FEATURE_ID_GPU_NV_CPU_BOOST = 0x0b,
+};
+
#define LWMI_FEATURE_ID_FAN_RPM 0x03

#define LWMI_TYPE_ID_NONE 0x00
@@ -631,6 +644,66 @@ static struct tunable_attr_01 ppt_pl4_ipl_cl = {
.type_id = LWMI_TYPE_ID_CROSSLOAD,
};

+static struct tunable_attr_01 gpu_nv_ppab = {
+ .device_id = LWMI_DEVICE_ID_GPU,
+ .feature_id = LWMI_FEATURE_ID_GPU_NV_PPAB,
+ .type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 gpu_nv_ctgp = {
+ .device_id = LWMI_DEVICE_ID_GPU,
+ .feature_id = LWMI_FEATURE_ID_GPU_NV_CTGP,
+ .type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 gpu_temp = {
+ .device_id = LWMI_DEVICE_ID_GPU,
+ .feature_id = LWMI_FEATURE_ID_GPU_TEMP,
+ .type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 gpu_nv_ac_offset = {
+ .device_id = LWMI_DEVICE_ID_GPU,
+ .feature_id = LWMI_FEATURE_ID_GPU_AC_OFFSET,
+ .type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 dgpu_boost_clk = {
+ .device_id = LWMI_DEVICE_ID_GPU,
+ .feature_id = LWMI_FEATURE_ID_DGPU_BOOST_CLK,
+ .type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 dgpu_enable = {
+ .device_id = LWMI_DEVICE_ID_GPU,
+ .feature_id = LWMI_FEATURE_ID_DGPU_EN,
+ .type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 gpu_mode = {
+ .device_id = LWMI_DEVICE_ID_GPU,
+ .feature_id = LWMI_FEATURE_ID_GPU_MODE,
+ .type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 dgpu_didvid = {
+ .device_id = LWMI_DEVICE_ID_GPU,
+ .feature_id = LWMI_FEATURE_ID_DGPU_DIDVID,
+ .type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 gpu_nv_bpl = {
+ .device_id = LWMI_DEVICE_ID_GPU,
+ .feature_id = LWMI_FEATURE_ID_GPU_NV_BPL,
+ .type_id = LWMI_TYPE_ID_NONE,
+};
+
+static struct tunable_attr_01 gpu_nv_cpu_boost = {
+ .device_id = LWMI_DEVICE_ID_GPU,
+ .feature_id = LWMI_FEATURE_ID_GPU_NV_CPU_BOOST,
+ .type_id = LWMI_TYPE_ID_NONE,
+};
+
struct capdata01_attr_group {
const struct attribute_group *attr_group;
struct tunable_attr_01 *tunable_attr;
@@ -1069,6 +1142,7 @@ static int lwmi_attr_01_is_supported(struct tunable_attr_01 *tunable_attr)
.name = _fsname, .attrs = _attrname##_attrs \
}

+/* CPU tunable attributes */
LWMI_ATTR_GROUP_TUNABLE_CAP01(cpu_temp, "cpu_temp",
"Set the CPU thermal load limit");
LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_cpu_cl, "ppt_cpu_cl",
@@ -1094,9 +1168,40 @@ LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl4_ipl, "ppt_pl4_ipl",
LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl4_ipl_cl, "ppt_pl4_ipl_cl",
"Set the CPU cross loading instantaneous power limit");

+/* GPU tunable attributes */
+LWMI_ATTR_GROUP_TUNABLE_CAP01(dgpu_boost_clk, "gpu_boost_clk",
+ "Set the dedicated GPU boost clock");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(dgpu_didvid, "gpu_didvid",
+ "Get the GPU device identifier and vendor identifier");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(dgpu_enable, "dgpu_enable",
+ "Set the dedicated Nvidia GPU enabled status");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_mode, "gpu_mode",
+ "Set the GPU mode by power limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_nv_ac_offset, "gpu_nv_ac_offset",
+ "Set the Nvidia GPU AC total processing power baseline offset");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_nv_bpl, "gpu_nv_bpl",
+ "Set the Nvidia GPU base power limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_nv_cpu_boost, "gpu_nv_cpu_boost",
+ "Set the Nvidia GPU to CPU dynamic boost limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_nv_ctgp, "gpu_nv_ctgp",
+ "Set the GPU configurable total graphics power");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_nv_ppab, "gpu_nv_ppab",
+ "Set the Nvidia GPU power performance aware boost limit");
+LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_temp, "gpu_temp",
+ "Set the GPU thermal load limit");

static struct capdata01_attr_group cd01_attr_groups[] = {
{ &cpu_temp_attr_group, &cpu_temp },
+ { &dgpu_boost_clk_attr_group, &dgpu_boost_clk },
+ { &dgpu_didvid_attr_group, &dgpu_didvid },
+ { &dgpu_enable_attr_group, &dgpu_enable },
+ { &gpu_mode_attr_group, &gpu_mode },
+ { &gpu_nv_ac_offset_attr_group, &gpu_nv_ac_offset },
+ { &gpu_nv_bpl_attr_group, &gpu_nv_bpl },
+ { &gpu_nv_cpu_boost_attr_group, &gpu_nv_cpu_boost },
+ { &gpu_nv_ctgp_attr_group, &gpu_nv_ctgp },
+ { &gpu_nv_ppab_attr_group, &gpu_nv_ppab },
+ { &gpu_temp_attr_group, &gpu_temp },
{ &ppt_cpu_cl_attr_group, &ppt_cpu_cl },
{ &ppt_pl1_apu_spl_attr_group, &ppt_pl1_apu_spl },
{ &ppt_pl1_spl_attr_group, &ppt_pl1_spl },
--
2.52.0