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X-CSE-ConnectionGUID: ZCXC34B9Sb2tOngBOlEuvw== X-CSE-MsgGUID: z+IgToISSleqBqxSobhD5w== X-IronPort-AV: E=McAfee;i="6800,10657,11932"; a="400610" X-IronPort-AV: E=Sophos;i="6.27,153,1787036400"; d="scan'208";a="400610" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Oct 2026 05:31:56 -0700 X-CSE-ConnectionGUID: RtqlN238RUax+tvStTUfjQ== X-CSE-MsgGUID: /ZpfJTdzQRGSQ19/vyfhxQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,153,1787036400"; d="scan'208";a="865209" Received: from ijarvine-mobl1.ger.corp.intel.com (HELO localhost) ([10.245.244.202]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Oct 2026 05:31:50 -0700 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Mon, 12 Oct 2026 15:31:46 +0300 (EEST) To: Mingyou Chen cc: Hans de Goede , Ilya Gladyshev , KentoNion , platform-driver-x86@vger.kernel.org, ted eric , Armin Wolf , LKML , Chris Taraszka , Matias Civadda , =?ISO-2022-JP?Q?=1B$B9b=1B=28J_=1B$B=3DSJ8=1B=28J?= , powerfullz , =?GB2312?B?y+8g0/7D+g==?= , =?ISO-8859-15?Q?Milo=A8_Vlku?= , Rsplwe , Bozhen Peng , Anton Karasev , Jame Jao Subject: Re: [PATCH v11 5/6] platform/x86: bitland-mifs-wmi: Add quirks table In-Reply-To: <20261012100532.19612-6-qby140326@gmail.com> Message-ID: <686c6dc8-965b-331f-a3de-6452ee5e2a53@linux.intel.com> References: <20261012100532.19612-1-qby140326@gmail.com> <20261012100532.19612-6-qby140326@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII On Mon, 12 Oct 2026, Mingyou Chen wrote: > The MIFS WMI interface is shared by several Bitland ODM laptops which > differ in the layout of the performance mode values of > WMI_FN_SYSTEM_PER_MODE and in the capability checks. > > Introduce a quirks table to support multiple machine families without > sprinkling model checks over the driver. > > Signed-off-by: Mingyou Chen > --- > drivers/platform/x86/bitland-mifs-wmi.c | 178 ++++++++++++++++-------- > 1 file changed, 121 insertions(+), 57 deletions(-) > > diff --git a/drivers/platform/x86/bitland-mifs-wmi.c b/drivers/platform/x86/bitland-mifs-wmi.c > index 93a519b96189..d61382ad4a0b 100644 > --- a/drivers/platform/x86/bitland-mifs-wmi.c > +++ b/drivers/platform/x86/bitland-mifs-wmi.c > @@ -12,6 +12,7 @@ > #include > #include > #include > +#include > #include > #include > #include > @@ -84,6 +85,41 @@ enum bitland_mifs_power_profile { > WMI_PP_FULL_SPEED = 3, > }; > > +struct bitland_mifs_wmi_data; > + > +struct bitland_profile_entry { > + enum platform_profile_option profile; > + u8 wmi_val; > + bool no_set; What is this for? I don't see you using it. If it's to disable a mode, I don't like the approach. -- i. > +}; > + > +struct bitland_mifs_quirks { > + const struct bitland_profile_entry *profile_entries; > + size_t num_profile_entries; > + > + bool return_code_at_end; > + bool skip_ac_type_check; > + > + /* Accept return value 0 on SET wmi functions */ > + bool accept_zero_function; > +}; > + > +static const struct bitland_profile_entry default_profile_entries[] = { > + { PLATFORM_PROFILE_LOW_POWER, WMI_PP_QUIET }, > + { PLATFORM_PROFILE_BALANCED, WMI_PP_BALANCED }, > + { PLATFORM_PROFILE_BALANCED_PERFORMANCE, WMI_PP_PERFORMANCE }, > + { PLATFORM_PROFILE_PERFORMANCE, WMI_PP_FULL_SPEED }, > +}; > + > +static const struct bitland_mifs_quirks default_quirks = { > + .profile_entries = default_profile_entries, > + .num_profile_entries = ARRAY_SIZE(default_profile_entries), > +}; > + > +static const struct dmi_system_id bitland_mifs_dmi_table[] = { > + {} > +}; > + > enum bitland_mifs_event_id { > WMI_EVENT_SWITCHVIDEOMODE = 1, > WMI_EVENT_SELECTIVE_SCREENSHOT = 2, > @@ -131,12 +167,24 @@ struct bitland_mifs_input { > u8 payload[28]; > } __packed; > > -struct bitland_mifs_output { > +struct bitland_mifs_output_head_rc { > __le16 return_code; > __le16 function; > u8 data[28]; > } __packed; > > +struct bitland_mifs_output_tail_rc { > + __le16 function; > + u8 data[28]; > + __le16 return_code; > +} __packed; > + > +union bitland_mifs_output_buf { > + struct bitland_mifs_output_head_rc head; > + struct bitland_mifs_output_tail_rc tail; > + u8 raw[32]; > +}; > + > struct bitland_mifs_event { > u8 event_type; > u8 event_id; > @@ -166,27 +214,41 @@ struct bitland_mifs_wmi_data { > struct input_dev *input_dev; > struct device *hwmon_dev; > struct device *pp_dev; > + const struct bitland_mifs_quirks *quirks; > enum platform_profile_option saved_profile; > }; > > static int bitland_mifs_wmi_call(struct bitland_mifs_wmi_data *data, > const struct bitland_mifs_input *input, > - struct bitland_mifs_output *output) > + struct bitland_mifs_output_head_rc *output) > { > struct wmi_buffer in_buf = { .length = sizeof(*input), .data = (void *)input }; > struct wmi_buffer out_buf = { 0 }; > + const u8 *payload_data; > + __le16 return_code; > + __le16 function; > int ret; > > guard(mutex)(&data->lock); > > ret = wmidev_invoke_method(data->wdev, 0, 1, &in_buf, &out_buf, > - sizeof(struct bitland_mifs_output)); > + sizeof(union bitland_mifs_output_buf)); > if (ret) > return ret; > > - struct bitland_mifs_output *result __free(kfree) = out_buf.data; > + union bitland_mifs_output_buf *result __free(kfree) = out_buf.data; > > - switch (le16_to_cpu(result->return_code)) { > + if (data->quirks->return_code_at_end) { > + return_code = result->tail.return_code; > + function = result->tail.function; > + payload_data = result->tail.data; > + } else { > + return_code = result->head.return_code; > + function = result->head.function; > + payload_data = result->head.data; > + } > + > + switch (le16_to_cpu(return_code)) { > case WMI_RETURN_CODE_SUCCESS: > break; > case WMI_RETURN_CODE_UNKNOWN_FUNCTION: > @@ -195,11 +257,16 @@ static int bitland_mifs_wmi_call(struct bitland_mifs_wmi_data *data, > return -EIO; > } > > - if (result->function != input->function) > - return -ENOMSG; > + if (function != input->function) { > + if (!(data->quirks->accept_zero_function && function == 0)) > + return -ENOMSG; > + } > > - if (output) > + if (output) { > + output->return_code = return_code; > + output->function = function; > memcpy(output, result, sizeof(*output)); > + } > > return 0; > } > @@ -208,45 +275,41 @@ static int laptop_profile_get(struct device *dev, > enum platform_profile_option *profile) > { > struct bitland_mifs_wmi_data *data = dev_get_drvdata(dev); > + const struct bitland_mifs_quirks *quirks = data->quirks; > struct bitland_mifs_input input = { > .operation = cpu_to_le16(WMI_METHOD_GET), > .function = cpu_to_le16(WMI_FN_SYSTEM_PER_MODE), > }; > - struct bitland_mifs_output result; > + struct bitland_mifs_output_head_rc result; > + size_t i; > int ret; > > ret = bitland_mifs_wmi_call(data, &input, &result); > if (ret) > return ret; > > - switch (result.data[0]) { > - case WMI_PP_BALANCED: > - *profile = PLATFORM_PROFILE_BALANCED; > - break; > - case WMI_PP_PERFORMANCE: > - *profile = PLATFORM_PROFILE_BALANCED_PERFORMANCE; > - break; > - case WMI_PP_QUIET: > - *profile = PLATFORM_PROFILE_LOW_POWER; > - break; > - case WMI_PP_FULL_SPEED: > - *profile = PLATFORM_PROFILE_PERFORMANCE; > - break; > - default: > - return -EINVAL; > + for (i = 0; i < quirks->num_profile_entries; i++) { > + if (quirks->profile_entries[i].wmi_val == result.data[0]) { > + *profile = quirks->profile_entries[i].profile; > + return 0; > + } > } > - return 0; > + > + return -EINVAL; > } > > -static int bitland_check_performance_capability(struct bitland_mifs_wmi_data *data) > +static int bitland_pp_check_capability(struct bitland_mifs_wmi_data *data) > { > struct bitland_mifs_input input = { > .operation = cpu_to_le16(WMI_METHOD_GET), > .function = cpu_to_le16(WMI_FN_SYSTEM_AC_TYPE), > }; > - struct bitland_mifs_output output; > + struct bitland_mifs_output_head_rc output; > int ret; > > + if (data->quirks->skip_ac_type_check) > + return power_supply_is_system_supplied() > 0 ? 0 : -EOPNOTSUPP; > + > /* Full-speed/performance mode requires DC power (not USB-C) */ > if (!power_supply_is_system_supplied()) > return -EOPNOTSUPP; > @@ -269,47 +332,42 @@ static int laptop_profile_set(struct device *dev, > enum platform_profile_option profile) > { > struct bitland_mifs_wmi_data *data = dev_get_drvdata(dev); > + const struct bitland_mifs_quirks *quirks = data->quirks; > struct bitland_mifs_input input = { > .operation = cpu_to_le16(WMI_METHOD_SET), > .function = cpu_to_le16(WMI_FN_SYSTEM_PER_MODE), > }; > + size_t i; > int ret; > - u8 val; > > - switch (profile) { > - case PLATFORM_PROFILE_LOW_POWER: > - val = WMI_PP_QUIET; > - break; > - case PLATFORM_PROFILE_BALANCED: > - val = WMI_PP_BALANCED; > - break; > - case PLATFORM_PROFILE_BALANCED_PERFORMANCE: > - ret = bitland_check_performance_capability(data); > - if (ret) > - return ret; > - val = WMI_PP_PERFORMANCE; > - break; > - case PLATFORM_PROFILE_PERFORMANCE: > - ret = bitland_check_performance_capability(data); > + if (profile == PLATFORM_PROFILE_PERFORMANCE || > + profile == PLATFORM_PROFILE_BALANCED_PERFORMANCE) { > + ret = bitland_pp_check_capability(data); > if (ret) > return ret; > - val = WMI_PP_FULL_SPEED; > - break; > - default: > - return -EOPNOTSUPP; > } > > - input.payload[0] = val; > + for (i = 0; i < quirks->num_profile_entries; i++) { > + if (quirks->profile_entries[i].profile == profile && > + !quirks->profile_entries[i].no_set) { > + input.payload[0] = quirks->profile_entries[i].wmi_val; > + return bitland_mifs_wmi_call(data, &input, NULL); > + } > + } > > - return bitland_mifs_wmi_call(data, &input, NULL); > + return -EOPNOTSUPP; > } > > static int platform_profile_probe(void *drvdata, unsigned long *choices) > { > - set_bit(PLATFORM_PROFILE_LOW_POWER, choices); > - set_bit(PLATFORM_PROFILE_BALANCED, choices); > - set_bit(PLATFORM_PROFILE_BALANCED_PERFORMANCE, choices); > - set_bit(PLATFORM_PROFILE_PERFORMANCE, choices); > + struct bitland_mifs_wmi_data *data = drvdata; > + const struct bitland_mifs_quirks *quirks = data->quirks; > + size_t i; > + > + for (i = 0; i < quirks->num_profile_entries; i++) { > + if (!quirks->profile_entries[i].no_set) > + set_bit(quirks->profile_entries[i].profile, choices); > + } > > return 0; > } > @@ -366,7 +424,7 @@ static int laptop_hwmon_read(struct device *dev, enum hwmon_sensor_types type, > struct bitland_mifs_input input = { > .operation = cpu_to_le16(WMI_METHOD_GET), > }; > - struct bitland_mifs_output res; > + struct bitland_mifs_output_head_rc res; > int ret; > > switch (type) { > @@ -455,7 +513,7 @@ static enum led_brightness laptop_kbd_led_get(struct led_classdev *led_cdev) > .operation = cpu_to_le16(WMI_METHOD_GET), > .function = cpu_to_le16(WMI_FN_RGB_KB_BRIGHTNESS), > }; > - struct bitland_mifs_output res; > + struct bitland_mifs_output_head_rc res; > int ret; > > ret = bitland_mifs_wmi_call(data, &input, &res); > @@ -480,7 +538,7 @@ static ssize_t gpu_mode_show(struct device *dev, struct device_attribute *attr, > .operation = cpu_to_le16(WMI_METHOD_GET), > .function = cpu_to_le16(WMI_FN_GPU_MODE), > }; > - struct bitland_mifs_output res; > + struct bitland_mifs_output_head_rc res; > u8 mode_val; > int ret; > > @@ -534,7 +592,7 @@ static ssize_t kb_mode_show(struct device *dev, struct device_attribute *attr, > .operation = cpu_to_le16(WMI_METHOD_GET), > .function = cpu_to_le16(WMI_FN_RGB_KB_MODE), > }; > - struct bitland_mifs_output res; > + struct bitland_mifs_output_head_rc res; > u8 mode_val; > int ret; > > @@ -718,6 +776,7 @@ static int bitland_mifs_wmi_probe(struct wmi_device *wdev, const void *context) > .default_label = ":" LED_FUNCTION_KBD_BACKLIGHT, > .devname_mandatory = true, > }; > + const struct dmi_system_id *dmi_id; > int ret; > > drv_data = devm_kzalloc(&wdev->dev, sizeof(*drv_data), GFP_KERNEL); > @@ -732,6 +791,11 @@ static int bitland_mifs_wmi_probe(struct wmi_device *wdev, const void *context) > > dev_set_drvdata(&wdev->dev, drv_data); > > + drv_data->quirks = &default_quirks; > + dmi_id = dmi_first_match(bitland_mifs_dmi_table); > + if (dmi_id) > + drv_data->quirks = dmi_id->driver_data; > + > if (dev_type == BITLAND_WMI_EVENT) { > /* Register input device for hotkeys */ > drv_data->input_dev = devm_input_allocate_device(&wdev->dev); >