[v4] platform/x86: inspur-wmi: Add platform profile support

  Add support for Inspur platforms to used the platform profile feature.

This will allow users to determine and control the platform modes
between low-power, balanced and performance modes.

Signed-off-by: Ai Chao <aichao@kylinos.cn>
---

v4: Add select ACPI_PLATFORM_PROFILE
v3: Remove input device, using the platform profile interface
v2: Remove Event GUID, remove inspur_wmi_notify and inspur_wmi_notify.

 drivers/platform/x86/Kconfig      |  11 ++
 drivers/platform/x86/Makefile     |   3 +
 drivers/platform/x86/inspur-wmi.c | 216 ++++++++++++++++++++++++++++++
 3 files changed, 230 insertions(+)
 create mode 100644 drivers/platform/x86/inspur-wmi.c
  

Am 19.10.23 um 05:05 schrieb Ai Chao:

> Add support for Inspur platforms to used the platform profile feature.
>
> This will allow users to determine and control the platform modes
> between low-power, balanced and performance modes.
>
> Signed-off-by: Ai Chao <aichao@kylinos.cn>
> ---
>
> v4: Add select ACPI_PLATFORM_PROFILE
> v3: Remove input device, using the platform profile interface
> v2: Remove Event GUID, remove inspur_wmi_notify and inspur_wmi_notify.
>
>   drivers/platform/x86/Kconfig      |  11 ++
>   drivers/platform/x86/Makefile     |   3 +
>   drivers/platform/x86/inspur-wmi.c | 216 ++++++++++++++++++++++++++++++
>   3 files changed, 230 insertions(+)
>   create mode 100644 drivers/platform/x86/inspur-wmi.c

I agree with Thomas Weißschuh that the driver name is a bit too generic, assuming
the WMI hotkey driver will appear sometime too.
Other than that, the driver seems good.

Armin Wolf

>
> diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
> index 2a1070543391..44f371876170 100644
> --- a/drivers/platform/x86/Kconfig
> +++ b/drivers/platform/x86/Kconfig
> @@ -988,6 +988,17 @@ config TOUCHSCREEN_DMI
>   	  the OS-image for the device. This option supplies the missing info.
>   	  Enable this for x86 tablets with Silead or Chipone touchscreens.
>
> +config INSPUR_WMI
> +	tristate "Inspur WMI platform profile driver"
> +	depends on ACPI_WMI
> +	select ACPI_PLATFORM_PROFILE
> +	help
> +	This will allow users to determine and control the platform modes
> +	between low-power, balanced and performance modes.
> +
> +	To compile this driver as a module, choose M here: the module
> +	will be called inspur-wmi.
> +
>   source "drivers/platform/x86/x86-android-tablets/Kconfig"
>
>   config FW_ATTR_CLASS
> diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
> index b457de5abf7d..9285c252757e 100644
> --- a/drivers/platform/x86/Makefile
> +++ b/drivers/platform/x86/Makefile
> @@ -98,6 +98,9 @@ obj-$(CONFIG_TOSHIBA_WMI)	+= toshiba-wmi.o
>   # before toshiba_acpi initializes
>   obj-$(CONFIG_ACPI_TOSHIBA)	+= toshiba_acpi.o
>
> +# Inspur
> +obj-$(CONFIG_INSPUR_WMI)	+= inspur-wmi.o
> +
>   # Laptop drivers
>   obj-$(CONFIG_ACPI_CMPC)		+= classmate-laptop.o
>   obj-$(CONFIG_COMPAL_LAPTOP)	+= compal-laptop.o
> diff --git a/drivers/platform/x86/inspur-wmi.c b/drivers/platform/x86/inspur-wmi.c
> new file mode 100644
> index 000000000000..243f31dd162c
> --- /dev/null
> +++ b/drivers/platform/x86/inspur-wmi.c
> @@ -0,0 +1,216 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + *  Inspur WMI power mode
> + *
> + *  Copyright (C) 2018	      Ai Chao <aichao@kylinos.cn>
> + */
> +
> +#include <linux/acpi.h>
> +#include <linux/device.h>
> +#include <linux/module.h>
> +#include <linux/platform_profile.h>
> +#include <linux/wmi.h>
> +
> +#define WMI_INSPUR_POWERMODE_BIOS_GUID "596C31E3-332D-43C9-AEE9-585493284F5D"
> +
> +enum inspur_wmi_method_ids {
> +	INSPUR_WMI_GET_POWERMODE = 0x02,
> +	INSPUR_WMI_SET_POWERMODE = 0x03,
> +};
> +
> +/**
> + * Power Mode:
> + *           0x0: Balance Mode
> + *           0x1: Performance Mode
> + *           0x2: Power Saver Mode
> + */
> +enum inspur_tmp_profile {
> +	INSPUR_TMP_PROFILE_BALANCE	= 0,
> +	INSPUR_TMP_PROFILE_PERFORMANCE	= 1,
> +	INSPUR_TMP_PROFILE_POWERSAVE	= 2,
> +};
> +
> +struct inspur_wmi_priv {
> +	struct wmi_device *wdev;
> +	struct platform_profile_handler handler;
> +};
> +
> +static int inspur_wmi_perform_query(struct wmi_device *wdev,
> +				    enum inspur_wmi_method_ids query_id,
> +				    void *buffer, size_t insize,
> +				    size_t outsize)
> +{
> +	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
> +	struct acpi_buffer input = { insize, buffer};
> +	union acpi_object *obj;
> +	acpi_status status;
> +	int ret = 0;
> +
> +	status = wmidev_evaluate_method(wdev, 0, query_id, &input, &output);
> +	if (ACPI_FAILURE(status)) {
> +		dev_err(&wdev->dev, "EC Powermode control failed: %s\n",
> +			acpi_format_exception(status));
> +		return -EIO;
> +	}
> +
> +	obj = output.pointer;
> +	if (!obj)
> +		return -EINVAL;
> +
> +	if (obj->type != ACPI_TYPE_BUFFER ||
> +	    obj->buffer.length != outsize) {
> +		ret = -EINVAL;
> +		goto out_free;
> +	}
> +
> +	memcpy(buffer, obj->buffer.pointer, obj->buffer.length);
> +
> +out_free:
> +	kfree(obj);
> +	return ret;
> +}
> +
> +/**
> + * Set Power Mode to EC RAM. If Power Mode value greater than 0x3,
> + * return error
> + * Method ID: 0x3
> + * Arg: 4 Bytes
> + * Byte [0]: Power Mode:
> + *         0x0: Balance Mode
> + *         0x1: Performance Mode
> + *         0x2: Power Saver Mode
> + * Return Value: 4 Bytes
> + * Byte [0]: Return Code
> + *         0x0: No Error
> + *         0x1: Error
> + */
> +static int inspur_platform_profile_set(struct platform_profile_handler *pprof,
> +				       enum platform_profile_option profile)
> +{
> +	struct inspur_wmi_priv *priv = container_of(pprof, struct inspur_wmi_priv,
> +						    handler);
> +	u8 ret_code[4] = {0, 0, 0, 0};
> +	int ret;
> +
> +	switch (profile) {
> +	case PLATFORM_PROFILE_BALANCED:
> +		ret_code[0] = INSPUR_TMP_PROFILE_BALANCE;
> +		break;
> +	case PLATFORM_PROFILE_PERFORMANCE:
> +		ret_code[0] = INSPUR_TMP_PROFILE_PERFORMANCE;
> +		break;
> +	case PLATFORM_PROFILE_LOW_POWER:
> +		ret_code[0] = INSPUR_TMP_PROFILE_POWERSAVE;
> +		break;
> +	default:
> +		return -EOPNOTSUPP;
> +	}
> +
> +	ret = inspur_wmi_perform_query(priv->wdev, INSPUR_WMI_SET_POWERMODE,
> +				       ret_code, sizeof(ret_code),
> +				       sizeof(ret_code));
> +
> +	if (ret < 0)
> +		return ret;
> +
> +	if (ret_code[0])
> +		return -EBADRQC;
> +
> +	return 0;
> +}
> +
> +/**
> + * Get Power Mode from EC RAM, If Power Mode value greater than 0x3,
> + * return error
> + * Method ID: 0x2
> + * Return Value: 4 Bytes
> + * Byte [0]: Return Code
> + *         0x0: No Error
> + *         0x1: Error
> + * Byte [1]: Power Mode
> + *         0x0: Balance Mode
> + *         0x1: Performance Mode
> + *         0x2: Power Saver Mode
> + */
> +static int inspur_platform_profile_get(struct platform_profile_handler *pprof,
> +				       enum platform_profile_option *profile)
> +{
> +	struct inspur_wmi_priv *priv = container_of(pprof, struct inspur_wmi_priv,
> +						    handler);
> +	u8 ret_code[4] = {0, 0, 0, 0};
> +	int ret;
> +
> +	ret = inspur_wmi_perform_query(priv->wdev, INSPUR_WMI_GET_POWERMODE,
> +				       &ret_code, sizeof(ret_code),
> +				       sizeof(ret_code));
> +	if (ret < 0)
> +		return ret;
> +
> +	if (ret_code[0])
> +		return -EBADRQC;
> +
> +	switch (ret_code[1]) {
> +	case INSPUR_TMP_PROFILE_BALANCE:
> +		*profile = PLATFORM_PROFILE_BALANCED;
> +		break;
> +	case INSPUR_TMP_PROFILE_PERFORMANCE:
> +		*profile = PLATFORM_PROFILE_PERFORMANCE;
> +		break;
> +	case INSPUR_TMP_PROFILE_POWERSAVE:
> +		*profile = PLATFORM_PROFILE_LOW_POWER;
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	return 0;
> +}
> +
> +static int inspur_wmi_probe(struct wmi_device *wdev, const void *context)
> +{
> +	struct inspur_wmi_priv *priv;
> +
> +	priv = devm_kzalloc(&wdev->dev, sizeof(*priv), GFP_KERNEL);
> +	if (!priv)
> +		return -ENOMEM;
> +
> +	priv->wdev = wdev;
> +	dev_set_drvdata(&wdev->dev, priv);
> +
> +	priv->handler.profile_get = inspur_platform_profile_get;
> +	priv->handler.profile_set = inspur_platform_profile_set;
> +
> +	set_bit(PLATFORM_PROFILE_LOW_POWER, priv->handler.choices);
> +	set_bit(PLATFORM_PROFILE_BALANCED, priv->handler.choices);
> +	set_bit(PLATFORM_PROFILE_PERFORMANCE, priv->handler.choices);
> +
> +	return platform_profile_register(&priv->handler);
> +}
> +
> +static void inspur_wmi_remove(struct wmi_device *wdev)
> +{
> +	platform_profile_remove();
> +}
> +
> +static const struct wmi_device_id inspur_wmi_id_table[] = {
> +	{ .guid_string = WMI_INSPUR_POWERMODE_BIOS_GUID },
> +	{  }
> +};
> +
> +MODULE_DEVICE_TABLE(wmi, inspur_wmi_id_table);
> +
> +static struct wmi_driver inspur_wmi_driver = {
> +	.driver = {
> +		.name = "inspur-wmi",
> +		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
> +	},
> +	.id_table = inspur_wmi_id_table,
> +	.probe = inspur_wmi_probe,
> +	.remove = inspur_wmi_remove,
> +};
> +
> +module_wmi_driver(inspur_wmi_driver);
> +
> +MODULE_AUTHOR("Ai Chao <aichao@kylinos.cn>");
> +MODULE_DESCRIPTION("Inspur WMI Platform Profile");
> +MODULE_LICENSE("GPL");
  

Hi Ai,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.6-rc7 next-20231023]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Ai-Chao/platform-x86-inspur-wmi-Add-platform-profile-support/20231019-110800
base:   linus/master
patch link:    https://lore.kernel.org/r/20231019030534.157971-1-aichao%40kylinos.cn
patch subject: [PATCH v4] platform/x86: inspur-wmi: Add platform profile support
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20231024/202310240736.pU47RVwI-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231024/202310240736.pU47RVwI-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202310240736.pU47RVwI-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/platform/x86/inspur-wmi.c:27: warning: cannot understand function prototype: 'enum inspur_tmp_profile '
   drivers/platform/x86/inspur-wmi.c:74: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Set Power Mode to EC RAM. If Power Mode value greater than 0x3,
   drivers/platform/x86/inspur-wmi.c:123: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Get Power Mode from EC RAM, If Power Mode value greater than 0x3,


vim +27 drivers/platform/x86/inspur-wmi.c

    20	
    21	/**
    22	 * Power Mode:
    23	 *           0x0: Balance Mode
    24	 *           0x1: Performance Mode
    25	 *           0x2: Power Saver Mode
    26	 */
  > 27	enum inspur_tmp_profile {
    28		INSPUR_TMP_PROFILE_BALANCE	= 0,
    29		INSPUR_TMP_PROFILE_PERFORMANCE	= 1,
    30		INSPUR_TMP_PROFILE_POWERSAVE	= 2,
    31	};
    32