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Date: Mon, 6 Mar 2023 22:24:54 +0800
From: Koba Ko <koba.ko@...onical.com>
To: Hans de Goede <hdegoede@...hat.com>,
Mark Gross <markgross@...nel.org>,
platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] platform/x86: dell-laptop: Register ctl-led for speaker-mute
Some platforms have the speaker-mute led and
current driver doesn't control it.
If the platform support the control of speaker-mute led, register it
Signed-off-by: Koba Ko <koba.ko@...onical.com>
---
drivers/platform/x86/dell/dell-laptop.c | 43 +++++++++++++++++++++++++
drivers/platform/x86/dell/dell-smbios.h | 2 ++
2 files changed, 45 insertions(+)
diff --git a/drivers/platform/x86/dell/dell-laptop.c b/drivers/platform/x86/dell/dell-laptop.c
index 1321687d923ed..38d95bae8e3ab 100644
--- a/drivers/platform/x86/dell/dell-laptop.c
+++ b/drivers/platform/x86/dell/dell-laptop.c
@@ -97,6 +97,7 @@ static struct rfkill *bluetooth_rfkill;
static struct rfkill *wwan_rfkill;
static bool force_rfkill;
static bool micmute_led_registered;
+static bool mute_led_registered;
module_param(force_rfkill, bool, 0444);
MODULE_PARM_DESC(force_rfkill, "enable rfkill on non whitelisted models");
@@ -2177,6 +2178,34 @@ static struct led_classdev micmute_led_cdev = {
.default_trigger = "audio-micmute",
};
+static int mute_led_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ struct calling_interface_buffer buffer;
+ struct calling_interface_token *token;
+ int state = brightness != LED_OFF;
+
+ if (state == 0)
+ token = dell_smbios_find_token(GLOBAL_MUTE_DISABLE);
+ else
+ token = dell_smbios_find_token(GLOBAL_MUTE_ENABLE);
+
+ if (!token)
+ return -ENODEV;
+
+ dell_fill_request(&buffer, token->location, token->value, 0, 0);
+ dell_send_request(&buffer, CLASS_TOKEN_WRITE, SELECT_TOKEN_STD);
+
+ return 0;
+}
+
+static struct led_classdev mute_led_cdev = {
+ .name = "platform::mute",
+ .max_brightness = 1,
+ .brightness_set_blocking = mute_led_set,
+ .default_trigger = "audio-mute",
+};
+
static int __init dell_init(void)
{
struct calling_interface_token *token;
@@ -2230,6 +2259,16 @@ static int __init dell_init(void)
micmute_led_registered = true;
}
+ if (dell_smbios_find_token(GLOBAL_MUTE_DISABLE) &&
+ dell_smbios_find_token(GLOBAL_MUTE_ENABLE) &&
+ !dell_privacy_has_mic_mute()) {
+ mute_led_cdev.brightness = ledtrig_audio_get(LED_AUDIO_MUTE);
+ ret = led_classdev_register(&platform_device->dev, &mute_led_cdev);
+ if (ret < 0)
+ goto fail_led;
+ mute_led_registered = true;
+ }
+
if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
return 0;
@@ -2277,6 +2316,8 @@ static int __init dell_init(void)
fail_backlight:
if (micmute_led_registered)
led_classdev_unregister(&micmute_led_cdev);
+ if (mute_led_registered)
+ led_classdev_unregister(&mute_led_cdev);
fail_led:
dell_cleanup_rfkill();
fail_rfkill:
@@ -2299,6 +2340,8 @@ static void __exit dell_exit(void)
backlight_device_unregister(dell_backlight_device);
if (micmute_led_registered)
led_classdev_unregister(&micmute_led_cdev);
+ if (mute_led_registered)
+ led_classdev_unregister(&mute_led_cdev);
dell_cleanup_rfkill();
if (platform_device) {
platform_device_unregister(platform_device);
diff --git a/drivers/platform/x86/dell/dell-smbios.h b/drivers/platform/x86/dell/dell-smbios.h
index 75fa8ea0476dc..eb341bf000c67 100644
--- a/drivers/platform/x86/dell/dell-smbios.h
+++ b/drivers/platform/x86/dell/dell-smbios.h
@@ -34,6 +34,8 @@
#define KBD_LED_AUTO_100_TOKEN 0x02F6
#define GLOBAL_MIC_MUTE_ENABLE 0x0364
#define GLOBAL_MIC_MUTE_DISABLE 0x0365
+#define GLOBAL_MUTE_ENABLE 0x058C
+#define GLOBAL_MUTE_DISABLE 0x058D
struct notifier_block;
--
2.25.1
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