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Message-ID: <9c5205e8-d3f2-4dbd-8863-5347bb5e77c9@gmx.de>
Date: Tue, 18 Nov 2025 12:12:15 +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: [PATCH 3/6] platform/x86/uniwill: Implement cTGP setting
Am 17.11.25 um 14:24 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.
>
> Signed-off-by: Werner Sembach <wse@...edocomputers.com>
> ---
> drivers/platform/x86/uniwill/uniwill-acpi.c | 110 +++++++++++++++++++-
> 1 file changed, 107 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/platform/x86/uniwill/uniwill-acpi.c b/drivers/platform/x86/uniwill/uniwill-acpi.c
> index 0cb86a701b2e1..de3417d9d1ac0 100644
> --- a/drivers/platform/x86/uniwill/uniwill-acpi.c
> +++ b/drivers/platform/x86/uniwill/uniwill-acpi.c
> @@ -122,11 +122,11 @@
> #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 +317,7 @@
> #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;
> @@ -498,6 +499,10 @@ 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;
> @@ -531,6 +536,10 @@ 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;
> @@ -786,6 +795,68 @@ 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;
> +
> + 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);
> +
> +static int uniwill_nvidia_ctgp_init(struct uniwill_data *data)
> +{
> + int ret;
> +
> + if (!(supported_features & 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);
I think we should initialize the power limits before enabling them, otherwise
the relevant registers might still contain invalid data.
> + 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;
Are those values the maximum values supported by the platform? If yes then
we should enforce them for sysfs writes.
Also, why is only cTGP accessible from user space?
Thanks,
Armin Wolf
> +
> + return 0;
> +}
> +
> static struct attribute *uniwill_attrs[] = {
> /* Keyboard-related */
> &dev_attr_fn_lock_toggle_enable.attr,
> @@ -794,6 +865,8 @@ 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
> };
>
> @@ -820,6 +893,11 @@ static umode_t uniwill_attr_is_visible(struct kobject *kobj, struct attribute *a
> return attr->mode;
> }
>
> + if (attr == &dev_attr_ctgp_offset.attr) {
> + if (supported_features & UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL)
> + return attr->mode;
> + }
> +
> return 0;
> }
>
> @@ -1371,6 +1449,10 @@ 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);
> }
>
> @@ -1547,6 +1629,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO InfinityBook Pro 14/16 Gen7 Intel",
> @@ -1554,6 +1637,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO InfinityBook Pro 16 Gen7 Intel/Commodore Omnia-Book Pro Gen 7",
> @@ -1561,6 +1645,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO InfinityBook Pro 14/16 Gen8 Intel/Commodore Omnia-Book Pro Gen 8",
> @@ -1575,6 +1660,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO InfinityBook Pro 16 Gen8 Intel",
> @@ -1582,6 +1668,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO InfinityBook Pro 14/15 Gen9 AMD",
> @@ -1694,6 +1781,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO Polaris 15/17 Gen2 Intel",
> @@ -1701,6 +1789,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO Stellaris/Polaris 15/17 Gen3 AMD",
> @@ -1708,6 +1797,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO Stellaris/Polaris 15/17 Gen3 Intel",
> @@ -1715,6 +1805,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO Stellaris/Polaris 15/17 Gen4 AMD",
> @@ -1722,6 +1813,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO Stellaris 15 Gen4 Intel",
> @@ -1729,6 +1821,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO Polaris 15/17 Gen5 AMD",
> @@ -1736,6 +1829,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO Stellaris 16 Gen5 AMD",
> @@ -1743,6 +1837,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO Stellaris 16/17 Gen5 Intel/Commodore ORION Gen 5",
> @@ -1750,6 +1845,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO Stellaris Slim 15 Gen6 AMD",
> @@ -1757,6 +1853,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO Stellaris Slim 15 Gen6 Intel/Commodore ORION Slim 15 Gen6",
> @@ -1764,6 +1861,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO Stellaris 16 Gen6 Intel/Commodore ORION 16 Gen6",
> @@ -1771,6 +1869,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO Stellaris 16 Gen6 Intel/Commodore ORION 16 Gen6",
> @@ -1778,6 +1877,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO Stellaris 17 Gen6 Intel/Commodore ORION 17 Gen6",
> @@ -1785,6 +1885,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO Stellaris 16 Gen7 AMD",
> @@ -1792,6 +1893,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO Stellaris 16 Gen7 Intel",
> @@ -1799,6 +1901,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO Stellaris 16 Gen7 Intel",
> @@ -1806,6 +1909,7 @@ 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 *)(UNIWILL_FEATURE_NVIDIA_CTGP_CONTROL),
> },
> {
> .ident = "TUXEDO Pulse 14 Gen1 AMD",
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