Dear Armin,
CE6C0974-0407-4F50-88BA-4FC3B6559AD8 is a WMI interface method.
From Lenovo keyboard WMI specification, I found it applicable to LNB products, i.e. YOGA/XiaoXin/Gaming/ThinkBook etc and performs the Lenovo customized hotkeys function for Consumer and SMB notebooks.
I implemented the audio mute LED and mic mute LED function of IdeaPad notebook in ideapad_laptop driver, because I found the mute LED function of Thinkpad notebook is implemented by thinkpad_acpi. And ideapad_laptop driver has the similar function as thinkpad_acpi.
Thanks,
Jackie Dong
-----Original Message-----
From: Armin Wolf <W_Armin@xxxxxx>
Sent: Monday, December 23, 2024 6:34 AM
To: Jackie Dong <xy-jackie@xxxxxxx>; ike.pan@xxxxxxxxxxxxx; hdegoede@xxxxxxxxxx; ilpo.jarvinen@xxxxxxxxxxxxxxx; perex@xxxxxxxx; tiwai@xxxxxxxx; bo.liu@xxxxxxxxxxxxxx; kovalev@xxxxxxxxxxxx; me@xxxxxxxxxxx; jaroslaw.janik@xxxxxxxxx; cs@xxxxxxxxx; songxiebing@xxxxxxxxxx; kailang@xxxxxxxxxxx; sbinding@xxxxxxxxxxxxxxxxxxxxx; simont@xxxxxxxxxxxxxxxxxxxxx; josh@xxxxxxxxxxxxxxxxx; rf@xxxxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx; platform-driver-x86@xxxxxxxxxxxxxxx; linux-sound@xxxxxxxxxxxxxxx; mpearson-lenovo@xxxxxxxxx; waterflowdeg@xxxxxxxxx; Jackie EG1 Dong <dongeg1@xxxxxxxxxx>
Subject: [External] Re: [PATCH 1/2] platform/x86: ideapad-laptop: Support for mic and audio leds.
Am 19.12.24 um 11:15 schrieb Jackie Dong:
> Implement Lenovo utility data WMI calls needed to make LEDs work on
> Ideapads that support this GUID.
> This enables the mic and audio LEDs to be updated correctly.
>
> Tested on below samples.
> ThinkBook 13X Gen4 IMH
> ThinkBook 14 G6 ABP
> ThinkBook 16p Gen4-21J8
> ThinkBook 16p Gen8-IRL
> ThinkBook 16p G7+ ASP
Hi,
i am a bit confused regarding the role of the CE6C0974-0407-4F50-88BA-4FC3B6559AD8 WMI device:
- is it a event or a method block?
- is it in some way connected with the remaining WMI devices supported by the ideapad-laptop driver?
Looking at the code it seems to me that the CE6C0974-0407-4F50-88BA-4FC3B6559AD8 WMI device is not a event device and is not directly connected with the remaining WMI devices (please correct me if i am wrong).
Can you please write a separate driver for this WMI device? Getting the ideapad-laptop driver involved in this seems to be unreasonable since the audio led functionality does not interact with the remaining driver.
This might be helpful: https://docs.kernel.org/wmi/driver-development-guide.html.
>
> Suggested-by: Mark Pearson <mpearson-lenovo@xxxxxxxxx>
> Signed-off-by: Jackie Dong <xy-jackie@xxxxxxx>
> Signed-off-by: Jackie Dong <dongeg1@xxxxxxxxxx>
Please keep only the Signed-of tag with the email address used for sending this patch.
Besides that its always nice to see vendors getting involved with upstream :).
Thanks,
Armin Wolf
> ---
> drivers/platform/x86/ideapad-laptop.c | 157 +++++++++++++++++++++++++-
> 1 file changed, 156 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/platform/x86/ideapad-laptop.c
> b/drivers/platform/x86/ideapad-laptop.c
> index c64dfc56651d..acea4aa8eac3 100644
> --- a/drivers/platform/x86/ideapad-laptop.c
> +++ b/drivers/platform/x86/ideapad-laptop.c
> @@ -32,6 +32,7 @@
> #include <linux/sysfs.h>
> #include <linux/types.h>
> #include <linux/wmi.h>
> +#include <sound/control.h>
> #include "ideapad-laptop.h"
>
> #include <acpi/video.h>
> @@ -1298,6 +1299,15 @@ static const struct key_entry ideapad_keymap[] = {
> { KE_END },
> };
>
> +/*
> + * Input parameters to mute/unmute audio LED and Mic LED */ struct
> +wmi_led_args {
> + u8 ID;
> + u8 SubID;
> + u16 Value;
> +};
> +
> static int ideapad_input_init(struct ideapad_private *priv)
> {
> struct input_dev *inputdev;
> @@ -2023,15 +2033,145 @@ static void ideapad_check_features(struct ideapad_private *priv)
> /*
> * WMI driver
> */
> +#define IDEAPAD_ACPI_LED_MAX (((SNDRV_CTL_ELEM_ACCESS_MIC_LED -\
> + SNDRV_CTL_ELEM_ACCESS_SPK_LED) >> SNDRV_CTL_ELEM_ACCESS_LED_SHIFT)
> ++ 1)
> +
> enum ideapad_wmi_event_type {
> IDEAPAD_WMI_EVENT_ESC,
> IDEAPAD_WMI_EVENT_FN_KEYS,
> + IDEAPAD_WMI_EVENT_LUD_KEYS,
> };
>
> +#define WMI_LUD_GET_SUPPORT 1
> +#define WMI_LUD_SET_FEATURE 2
> +
> +#define WMI_LUD_GET_MICMUTE_LED_VER 20
> +#define WMI_LUD_GET_AUDIOMUTE_LED_VER 26
> +
> +#define WMI_LUD_SUPPORT_MICMUTE_LED_VER 25
> +#define WMI_LUD_SUPPORT_AUDIOMUTE_LED_VER 27
> +
> struct ideapad_wmi_private {
> enum ideapad_wmi_event_type event;
> + struct led_classdev cdev[IDEAPAD_ACPI_LED_MAX];
> };
>
> +static struct wmi_device *led_wdev;
> +
> +enum mute_led_type {
> + MIC_MUTE,
> + AUDIO_MUTE,
> +};
> +
> +static int ideapad_wmi_mute_led_set(enum mute_led_type led_type, struct led_classdev *led_cdev,
> + enum led_brightness brightness)
> +
> +{
> + struct wmi_led_args led_arg = {0, 0, 0};
> + struct acpi_buffer input;
> + acpi_status status;
> +
> + if (led_type == MIC_MUTE)
> + led_arg.ID = brightness == LED_ON ? 1 : 2;
> + else if (led_type == AUDIO_MUTE)
> + led_arg.ID = brightness == LED_ON ? 4 : 5;
> + else
> + return -EINVAL;
> +
> + input.length = sizeof(struct wmi_led_args);
> + input.pointer = &led_arg;
> + status = wmidev_evaluate_method(led_wdev, 0, WMI_LUD_SET_FEATURE,
> +&input, NULL);
> +
> + if (ACPI_FAILURE(status))
> + return -EIO;
> +
> + return 0;
> +}
> +
> +static int ideapad_wmi_audiomute_led_set(struct led_classdev *led_cdev,
> + enum led_brightness brightness)
> +
> +{
> + return ideapad_wmi_mute_led_set(AUDIO_MUTE, led_cdev, brightness); }
> +
> +static int ideapad_wmi_micmute_led_set(struct led_classdev *led_cdev,
> + enum led_brightness brightness) {
> + return ideapad_wmi_mute_led_set(MIC_MUTE, led_cdev, brightness); }
> +
> +static int ideapad_wmi_leds_init(enum mute_led_type led_type, struct
> +device *dev) {
> + struct ideapad_wmi_private *wpriv = dev_get_drvdata(dev);
> + struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
> + struct acpi_buffer input;
> + union acpi_object *obj;
> + int led_version, err = 0;
> + unsigned int wmiarg;
> + acpi_status status;
> +
> + if (led_type == MIC_MUTE)
> + wmiarg = WMI_LUD_GET_MICMUTE_LED_VER;
> + else if (led_type == AUDIO_MUTE)
> + wmiarg = WMI_LUD_GET_AUDIOMUTE_LED_VER;
> + else
> + return -EINVAL;
> +
> + input.length = sizeof(wmiarg);
> + input.pointer = &wmiarg;
> + status = wmidev_evaluate_method(led_wdev, 0, WMI_LUD_GET_SUPPORT, &input, &output);
> + if (ACPI_FAILURE(status)) {
> + kfree(output.pointer);
> + return -EIO;
> + }
> + obj = output.pointer;
> + led_version = obj->integer.value;
> +
> + wpriv->cdev[led_type].max_brightness = LED_ON;
> + wpriv->cdev[led_type].dev = dev;
> + wpriv->cdev[led_type].flags = LED_CORE_SUSPENDRESUME;
> +
> + if (led_type == MIC_MUTE) {
> + if (led_version != WMI_LUD_SUPPORT_MICMUTE_LED_VER) {
> + dev_info(dev, "This product doesn't support mic mute LED.\n");
> + return -EIO;
> + }
> + wpriv->cdev[led_type].name = "platform::micmute";
> + wpriv->cdev[led_type].brightness_set_blocking = &ideapad_wmi_micmute_led_set;
> + wpriv->cdev[led_type].default_trigger = "audio-micmute";
> +
> + err = devm_led_classdev_register(dev, &wpriv->cdev[led_type]);
> + if (err < 0) {
> + dev_err(dev, "Could not register mic mute LED : %d\n", err);
> + led_classdev_unregister(&wpriv->cdev[led_type]);
> + }
> + } else {
> + if (led_version != WMI_LUD_SUPPORT_AUDIOMUTE_LED_VER) {
> + dev_info(dev, "This product doesn't support audio mute LED.\n");
> + return -EIO;
> + }
> + wpriv->cdev[led_type].name = "platform::mute";
> + wpriv->cdev[led_type].brightness_set_blocking = &ideapad_wmi_audiomute_led_set;
> + wpriv->cdev[led_type].default_trigger = "audio-mute";
> +
> + err = devm_led_classdev_register(dev, &wpriv->cdev[led_type]);
> + if (err < 0) {
> + dev_err(dev, "Could not register audio mute LED: %d\n", err);
> + led_classdev_unregister(&wpriv->cdev[led_type]);
> + }
> + }
> +
> + kfree(obj);
> + return err;
> +}
> +
> +static void ideapad_wmi_leds_setup(struct device *dev) {
> + ideapad_wmi_leds_init(MIC_MUTE, dev);
> + ideapad_wmi_leds_init(AUDIO_MUTE, dev); }
> +
> static int ideapad_wmi_probe(struct wmi_device *wdev, const void *context)
> {
> struct ideapad_wmi_private *wpriv;
> @@ -2043,6 +2183,12 @@ static int ideapad_wmi_probe(struct wmi_device *wdev, const void *context)
> *wpriv = *(const struct ideapad_wmi_private *)context;
>
> dev_set_drvdata(&wdev->dev, wpriv);
> +
> + if (wpriv->event == IDEAPAD_WMI_EVENT_LUD_KEYS) {
> + led_wdev = wdev;
> + ideapad_wmi_leds_setup(&wdev->dev);
> + }
> +
> return 0;
> }
>
> @@ -2088,6 +2234,9 @@ static void ideapad_wmi_notify(struct wmi_device *wdev, union acpi_object *data)
> data->integer.value | IDEAPAD_WMI_KEY);
>
> break;
> + case IDEAPAD_WMI_EVENT_LUD_KEYS:
> + break;
> +
> }
> }
>
> @@ -2099,10 +2248,16 @@ static const struct ideapad_wmi_private ideapad_wmi_context_fn_keys = {
> .event = IDEAPAD_WMI_EVENT_FN_KEYS
> };
>
> +static const struct ideapad_wmi_private ideapad_wmi_context_LUD_keys = {
> + .event = IDEAPAD_WMI_EVENT_LUD_KEYS
> +};
> +
> static const struct wmi_device_id ideapad_wmi_ids[] = {
> { "26CAB2E5-5CF1-46AE-AAC3-4A12B6BA50E6", &ideapad_wmi_context_esc }, /* Yoga 3 */
> { "56322276-8493-4CE8-A783-98C991274F5E", &ideapad_wmi_context_esc }, /* Yoga 700 */
> - { "8FC0DE0C-B4E4-43FD-B0F3-8871711C1294", &ideapad_wmi_context_fn_keys }, /* Legion 5 */
> + { "8FC0DE0C-B4E4-43FD-B0F3-8871711C1294", &ideapad_wmi_context_fn_keys }, /* FN keys */
> + { "CE6C0974-0407-4F50-88BA-4FC3B6559AD8",
> +&ideapad_wmi_context_LUD_keys }, /* Util data */
> +
> {},
> };
> MODULE_DEVICE_TABLE(wmi, ideapad_wmi_ids);
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