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Message-ID: <31479244-510b-4915-9443-8941b0af00c6@gmx.de>
Date: Wed, 26 Nov 2025 20:33:10 +0100
From: Armin Wolf <W_Armin@....de>
To: Werner Sembach <wse@...edocomputers.com>, hansg@...nel.org,
ilpo.jarvinen@...ux.intel.com
Cc: platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 2/2] platform/x86/uniwill: Implement cTGP setting
Am 26.11.25 um 13:23 schrieb Werner Sembach:
>
> Am 25.11.25 um 21:31 schrieb Armin Wolf:
>> Am 25.11.25 um 14:49 schrieb Werner Sembach:
>>
>>> Uniwill offers user setable cTGP for their EC on devices using
>>> NVIDIA 3000
>>> Series and newer GPUs. This patch implements this setting as a sysfs
>>> attribute.
>>>
>>> For one device, the TUXEDO InfinityBook Gen7, the variant with and
>>> without
>>> NVIDIA GPU can't be differentiated using only the DMI strings, so
>>> the new
>>> probe callback needs to be used to test a bit from the EC memory.
>>>
>>> Signed-off-by: Werner Sembach <wse@...edocomputers.com>
>>> ---
>>> drivers/platform/x86/uniwill/uniwill-acpi.c | 157
>>> ++++++++++++++++----
>>> 1 file changed, 132 insertions(+), 25 deletions(-)
>>>
>>> diff --git a/drivers/platform/x86/uniwill/uniwill-acpi.c
>>> b/drivers/platform/x86/uniwill/uniwill-acpi.c
>>> index f6a1054379ee1..503de3858cc0b 100644
>>> --- a/drivers/platform/x86/uniwill/uniwill-acpi.c
>>> +++ b/drivers/platform/x86/uniwill/uniwill-acpi.c
>>> @@ -88,6 +88,9 @@
>>> #define EC_ADDR_GPU_TEMP 0x044F
>>> +#define EC_ADDR_SYSTEM_ID 0x0456
>>> +#define HAS_GPU BIT(7)
>>> +
>>> #define EC_ADDR_MAIN_FAN_RPM_1 0x0464
>>> #define EC_ADDR_MAIN_FAN_RPM_2 0x0465
>>> @@ -122,11 +125,11 @@
>>> #define CTGP_DB_DB_ENABLE BIT(1)
>>> #define CTGP_DB_CTGP_ENABLE BIT(2)
>>> -#define EC_ADDR_CTGP_OFFSET 0x0744
>>> +#define EC_ADDR_CTGP_DB_CTGP_OFFSET 0x0744
>>> -#define EC_ADDR_TPP_OFFSET 0x0745
>>> +#define EC_ADDR_CTGP_DB_TPP_OFFSET 0x0745
>>> -#define EC_ADDR_MAX_TGP 0x0746
>>> +#define EC_ADDR_CTGP_DB_DB_OFFSET 0x0746
>>> #define EC_ADDR_LIGHTBAR_AC_CTRL 0x0748
>>> #define LIGHTBAR_APP_EXISTS BIT(0)
>>> @@ -317,6 +320,7 @@
>>> #define UNIWILL_FEATURE_LIGHTBAR BIT(3)
>>> #define UNIWILL_FEATURE_BATTERY BIT(4)
>>> #define UNIWILL_FEATURE_HWMON BIT(5)
>>> +#define UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL BIT(6)
>>> struct uniwill_data {
>>> struct device *dev;
>>> @@ -514,6 +518,10 @@ static bool uniwill_writeable_reg(struct device
>>> *dev, unsigned int reg)
>>> case EC_ADDR_LIGHTBAR_BAT_RED:
>>> case EC_ADDR_LIGHTBAR_BAT_GREEN:
>>> case EC_ADDR_LIGHTBAR_BAT_BLUE:
>>> + case EC_ADDR_CTGP_DB_CTRL:
>>> + case EC_ADDR_CTGP_DB_CTGP_OFFSET:
>>> + case EC_ADDR_CTGP_DB_TPP_OFFSET:
>>> + case EC_ADDR_CTGP_DB_DB_OFFSET:
>>> return true;
>>> default:
>>> return false;
>>> @@ -547,6 +555,10 @@ static bool uniwill_readable_reg(struct device
>>> *dev, unsigned int reg)
>>> case EC_ADDR_LIGHTBAR_BAT_RED:
>>> case EC_ADDR_LIGHTBAR_BAT_GREEN:
>>> case EC_ADDR_LIGHTBAR_BAT_BLUE:
>>> + case EC_ADDR_CTGP_DB_CTRL:
>>> + case EC_ADDR_CTGP_DB_CTGP_OFFSET:
>>> + case EC_ADDR_CTGP_DB_TPP_OFFSET:
>>> + case EC_ADDR_CTGP_DB_DB_OFFSET:
>>> return true;
>>> default:
>>> return false;
>>> @@ -802,6 +814,68 @@ static ssize_t breathing_in_suspend_show(struct
>>> device *dev, struct device_attri
>>> static DEVICE_ATTR_RW(breathing_in_suspend);
>>> +static ssize_t ctgp_offset_store(struct device *dev, struct
>>> device_attribute *attr,
>>> + const char *buf, size_t count)
>>> +{
>>> + struct uniwill_data *data = dev_get_drvdata(dev);
>>> + unsigned int value;
>>> + int ret;
>>> +
>>> + ret = kstrtouint(buf, 0, &value);
>>> + if (ret < 0)
>>> + return ret;
>>> Please check for input values larger than 255 and return -EINVAL in
>>> such a case.
>>> +
>>> + ret = regmap_write(data->regmap, EC_ADDR_CTGP_DB_CTGP_OFFSET,
>>> value);
>>> + if (ret < 0)
>>> + return ret;
>>> +
>>> + return count;
>>> +}
>>> +
>>> +static ssize_t ctgp_offset_show(struct device *dev, struct
>>> device_attribute *attr,
>>> + char *buf)
>>> +{
>>> + struct uniwill_data *data = dev_get_drvdata(dev);
>>> + unsigned int value;
>>> + int ret;
>>> +
>>> + ret = regmap_read(data->regmap, EC_ADDR_CTGP_DB_CTGP_OFFSET,
>>> &value);
>>> + if (ret < 0)
>>> + return ret;
>>> +
>>> + return sysfs_emit(buf, "%u\n", value);
>>> +}
>>> +
>>> +DEVICE_ATTR_RW(ctgp_offset);
>>
>> Please mark this device attribute as static.
> ack thanks for spotting
>>
>>> +
>>> +static int uniwill_nvidia_ctgp_init(struct uniwill_data *data)
>>> +{
>>> + int ret;
>>> +
>>> + if (!uniwill_device_supports(data,
>>> UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL))
>>> + return 0;
>>> +
>>> + ret = regmap_update_bits(data->regmap, EC_ADDR_CTGP_DB_CTRL,
>>> + CTGP_DB_GENERAL_ENABLE | CTGP_DB_DB_ENABLE |
>>> CTGP_DB_CTGP_ENABLE,
>>> + CTGP_DB_GENERAL_ENABLE | CTGP_DB_DB_ENABLE |
>>> CTGP_DB_CTGP_ENABLE);
>>
>> Please initialize the power limits before enabling them.
> ack, sorry forgot
>> Also, maybe disabling those power limits during
>> suspend and re-enabling them during resume would be a good idea? This
>> way we can avoid overheating the
>> device should the fan stop too early.
>
> Don't think that is necessary as other vendors don't even have the
> ability to disable db for example.
>
> Also even with ctgp and db disabled the minimum TGP is still reachable
> and that already is 125W on some devices.
>
Disabling cTGP and dynamic boost during suspend is necessary because regmap might restore EC_ADDR_CTGP_DB_CTRL first
during resume, and this might cause issues should EC_ADDR_CTGP_DB_CTGP_OFFSET and friends contain garbage data.
I am aware that the OEM software on the Intel Nuc laptop does not disable those settings when suspending, but i
just want to make sure that no bad things happen on devices with a badly designed platform firmware.
Thanks,
Armin Wolf
>>
>>> + if (ret < 0)
>>> + return ret;
>>> +
>>> + ret = regmap_write(data->regmap, EC_ADDR_CTGP_DB_CTGP_OFFSET, 0);
>>> + if (ret < 0)
>>> + return ret;
>>> +
>>> + ret = regmap_write(data->regmap, EC_ADDR_CTGP_DB_TPP_OFFSET, 255);
>>> + if (ret < 0)
>>> + return ret;
>>> +
>>> + ret = regmap_write(data->regmap, EC_ADDR_CTGP_DB_DB_OFFSET, 25);
>>> + if (ret < 0)
>>> + return ret;
>>> +
>>> + return 0;
>>> +}
>>> +
>>> static struct attribute *uniwill_attrs[] = {
>>> /* Keyboard-related */
>>> &dev_attr_fn_lock_toggle_enable.attr,
>>> @@ -810,6 +884,8 @@ static struct attribute *uniwill_attrs[] = {
>>> /* Lightbar-related */
>>> &dev_attr_rainbow_animation.attr,
>>> &dev_attr_breathing_in_suspend.attr,
>>> + /* Power-management-related */
>>> + &dev_attr_ctgp_offset.attr,
>>> NULL
>>> };
>>> @@ -839,6 +915,11 @@ static umode_t uniwill_attr_is_visible(struct
>>> kobject *kobj, struct attribute *a
>>> return attr->mode;
>>> }
>>> + if (attr == &dev_attr_ctgp_offset.attr) {
>>> + if (uniwill_device_supports(data,
>>> UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL))
>>> + return attr->mode;
>>> + }
>>> +
>>> return 0;
>>> }
>>> @@ -1405,6 +1486,10 @@ static int uniwill_probe(struct
>>> platform_device *pdev)
>>> if (ret < 0)
>>> return ret;
>>> + ret = uniwill_nvidia_ctgp_init(data);
>>> + if (ret < 0)
>>> + return ret;
>>> +
>>> return uniwill_input_init(data);
>>> }
>>> @@ -1545,6 +1630,28 @@ struct uniwill_device_descriptor
>>> lapkc71f_descriptor __initdata = {
>>> UNIWILL_FEATURE_HWMON
>>> };
>>> +static int phxarx1_phxaqf1_probe(struct uniwill_data *data)
>>> +{
>>> + unsigned int value;
>>> + int ret;
>>> +
>>> + ret = regmap_read(data->regmap, EC_ADDR_SYSTEM_ID, &value);
>>> + if (ret < 0)
>>> + return ret;
>>
>> Please add an empty line here.
> kk
>>
>>> + if (value & HAS_GPU)
>>> + data->features |= UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL;
>>> +
>>> + return 0;
>>> +};
>>> +
>>> +struct uniwill_device_descriptor phxarx1_phxaqf1_descriptor
>>> __initdata = {
>>> + .probe = phxarx1_phxaqf1_probe
>>> +};
>>> +
>>> +struct uniwill_device_descriptor tux_featureset_1_descriptor
>>> __initdata = {
>>> + .features = UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL
>>> +};
>>> +
>>> struct uniwill_device_descriptor void_descriptor __initdata = {};
>>
>> I just noticed that all device descriptors are not marked as static.
>> Please fix this.
>
> ack, sorry overlooked that
>
> Quick feedback if I should include the suspend disable anyway and I
> will wait a little bit to give Ilpo a chance to respond, but other
> than that: non RFC of this patchset incoming
>
> Best regards,
>
> Werner
>
>>
>> Other than that, the patch looks very promising.
>>
>> Thanks,
>> Armin Wolf
>>
>>> static const struct dmi_system_id uniwill_dmi_table[]
>>> __initconst = {
>>> @@ -1594,7 +1701,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME, "PHxTQx1"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO InfinityBook Pro 14/16 Gen7 Intel",
>>> @@ -1602,7 +1709,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME, "PHxARX1_PHxAQF1"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO InfinityBook Pro 16 Gen7 Intel/Commodore
>>> Omnia-Book Pro Gen 7",
>>> @@ -1610,7 +1717,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME,
>>> "PH6AG01_PH6AQ71_PH6AQI1"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO InfinityBook Pro 14/16 Gen8
>>> Intel/Commodore Omnia-Book Pro Gen 8",
>>> @@ -1626,7 +1733,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME, "PH4PG31"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO InfinityBook Pro 16 Gen8 Intel",
>>> @@ -1634,7 +1741,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME, "PH6PG01_PH6PG71"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO InfinityBook Pro 14/15 Gen9 AMD",
>>> @@ -1802,7 +1909,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME, "GMxMGxx"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO Polaris 15/17 Gen2 Intel",
>>> @@ -1810,7 +1917,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME, "GMxNGxx"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO Stellaris/Polaris 15/17 Gen3 AMD",
>>> @@ -1818,7 +1925,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME, "GMxZGxx"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO Stellaris/Polaris 15/17 Gen3 Intel",
>>> @@ -1826,7 +1933,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME, "GMxTGxx"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO Stellaris/Polaris 15/17 Gen4 AMD",
>>> @@ -1834,7 +1941,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME, "GMxRGxx"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO Stellaris 15 Gen4 Intel",
>>> @@ -1842,7 +1949,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME, "GMxAGxx"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO Polaris 15/17 Gen5 AMD",
>>> @@ -1850,7 +1957,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME, "GMxXGxx"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO Stellaris 16 Gen5 AMD",
>>> @@ -1858,7 +1965,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME, "GM6XGxX"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO Stellaris 16/17 Gen5 Intel/Commodore
>>> ORION Gen 5",
>>> @@ -1866,7 +1973,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME, "GMxPXxx"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO Stellaris Slim 15 Gen6 AMD",
>>> @@ -1874,7 +1981,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME, "GMxHGxx"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO Stellaris Slim 15 Gen6 Intel/Commodore
>>> ORION Slim 15 Gen6",
>>> @@ -1882,7 +1989,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME, "GM5IXxA"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO Stellaris 16 Gen6 Intel/Commodore ORION
>>> 16 Gen6",
>>> @@ -1890,7 +1997,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME, "GM6IXxB_MB1"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO Stellaris 16 Gen6 Intel/Commodore ORION
>>> 16 Gen6",
>>> @@ -1898,7 +2005,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME, "GM6IXxB_MB2"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO Stellaris 17 Gen6 Intel/Commodore ORION
>>> 17 Gen6",
>>> @@ -1906,7 +2013,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME, "GM7IXxN"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO Stellaris 16 Gen7 AMD",
>>> @@ -1914,7 +2021,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME, "X6FR5xxY"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO Stellaris 16 Gen7 Intel",
>>> @@ -1922,7 +2029,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME, "X6AR5xxY"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO Stellaris 16 Gen7 Intel",
>>> @@ -1930,7 +2037,7 @@ static const struct dmi_system_id
>>> uniwill_dmi_table[] __initconst = {
>>> DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
>>> DMI_EXACT_MATCH(DMI_BOARD_NAME, "X6AR5xxY_mLED"),
>>> },
>>> - .driver_data = &void_descriptor,
>>> + .driver_data = &tux_featureset_1_descriptor,
>>> },
>>> {
>>> .ident = "TUXEDO Pulse 14 Gen1 AMD",
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