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platform/x86: thinkpad_acpi: Call led_classdev_notify_brightness_hw_changed on kbd brightness change
Make thinkpad_acpi call led_classdev_notify_brightness_hw_changed on the kbd_led led_classdev registered by thinkpad_acpi when the kbd backlight brightness is changed through the hotkey. This will allow userspace to monitor (poll) for brightness changes on these LEDs caused by the hotkey. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Pavel Machek <pavel@ucw.cz>
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1 changed files with 39 additions and 5 deletions
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@ -163,6 +163,7 @@ enum tpacpi_hkey_event_t {
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TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */
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TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */
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TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */
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TP_HKEY_EV_KBD_LIGHT = 0x1012, /* Thinklight/kbd backlight */
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TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */
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TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */
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TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */
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@ -1957,7 +1958,7 @@ enum { /* Positions of some of the keys in hotkey masks */
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TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
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TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
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TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
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TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
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TP_ACPI_HKEY_KBD_LIGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
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TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
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TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
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TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
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@ -2342,7 +2343,7 @@ static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
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n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
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n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
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}
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if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
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if (m & TP_ACPI_HKEY_KBD_LIGHT_MASK) {
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d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
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n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
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}
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@ -5082,15 +5083,26 @@ static struct ibm_struct video_driver_data = {
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* Keyboard backlight subdriver
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*/
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static enum led_brightness kbdlight_brightness;
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static DEFINE_MUTEX(kbdlight_mutex);
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static int kbdlight_set_level(int level)
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{
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int ret = 0;
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if (!hkey_handle)
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return -ENXIO;
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if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level))
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return -EIO;
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mutex_lock(&kbdlight_mutex);
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return 0;
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if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level))
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ret = -EIO;
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else
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kbdlight_brightness = level;
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mutex_unlock(&kbdlight_mutex);
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return ret;
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}
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static int kbdlight_get_level(void)
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@ -5175,6 +5187,7 @@ static struct tpacpi_led_classdev tpacpi_led_kbdlight = {
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.led_classdev = {
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.name = "tpacpi::kbd_backlight",
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.max_brightness = 2,
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.flags = LED_BRIGHT_HW_CHANGED,
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.brightness_set_blocking = &kbdlight_sysfs_set,
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.brightness_get = &kbdlight_sysfs_get,
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}
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@ -5194,6 +5207,7 @@ static int __init kbdlight_init(struct ibm_init_struct *iibm)
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return 1;
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}
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kbdlight_brightness = kbdlight_sysfs_get(NULL);
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tp_features.kbdlight = 1;
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rc = led_classdev_register(&tpacpi_pdev->dev,
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@ -5203,6 +5217,8 @@ static int __init kbdlight_init(struct ibm_init_struct *iibm)
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return rc;
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}
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tpacpi_hotkey_driver_mask_set(hotkey_driver_mask |
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TP_ACPI_HKEY_KBD_LIGHT_MASK);
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return 0;
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}
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@ -9119,6 +9135,24 @@ static void tpacpi_driver_event(const unsigned int hkey_event)
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volume_alsa_notify_change();
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}
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}
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if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) {
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enum led_brightness brightness;
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mutex_lock(&kbdlight_mutex);
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/*
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* Check the brightness actually changed, setting the brightness
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* through kbdlight_set_level() also triggers this event.
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*/
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brightness = kbdlight_sysfs_get(NULL);
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if (kbdlight_brightness != brightness) {
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kbdlight_brightness = brightness;
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led_classdev_notify_brightness_hw_changed(
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&tpacpi_led_kbdlight.led_classdev, brightness);
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}
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mutex_unlock(&kbdlight_mutex);
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}
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}
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static void hotkey_driver_event(const unsigned int scancode)
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