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// SPDX-License-Identifier: GPL-2.0
/* Helper functions for Thinkpad LED control;
* to be included from codec driver
*/
#if IS_ENABLED(CONFIG_THINKPAD_ACPI) && IS_REACHABLE(CONFIG_LEDS_TRIGGER_AUDIO)
#include <linux/acpi.h>
#include <linux/leds.h>
static void (*old_vmaster_hook)(void *, int);
static bool is_thinkpad(struct hda_codec *codec)
{
return (codec->core.subsystem_id >> 16 == 0x17aa) &&
(acpi_dev_found("LEN0068") || acpi_dev_found("LEN0268") ||
acpi_dev_found("IBM0068"));
}
static void update_tpacpi_mute_led(void *private_data, int enabled)
{
if (old_vmaster_hook)
old_vmaster_hook(private_data, enabled);
ledtrig_audio_set(LED_AUDIO_MUTE, enabled ? LED_OFF : LED_ON);
}
static void hda_fixup_thinkpad_acpi(struct hda_codec *codec,
const struct hda_fixup *fix, int action)
{
struct hda_gen_spec *spec = codec->spec;
if (action == HDA_FIXUP_ACT_PROBE) {
if (!is_thinkpad(codec))
return;
old_vmaster_hook = spec->vmaster_mute.hook;
spec->vmaster_mute.hook = update_tpacpi_mute_led;
snd_hda_gen_fixup_micmute_led(codec, fix, action);
}
}
#else /* CONFIG_THINKPAD_ACPI */
static void hda_fixup_thinkpad_acpi(struct hda_codec *codec,
const struct hda_fixup *fix, int action)
{
}
#endif /* CONFIG_THINKPAD_ACPI */
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