LXR linux/sound/pci/hda/thinkpad

   1// SPDX-License-Identifier: GPL-2.0
   2/* Helper functions for Thinkpad LED control;
   3 * to be included from codec driver
   4 */
   5
   6#if IS_ENABLED(CONFIG_THINKPAD_ACPI) && IS_REACHABLE(CONFIG_LEDS_TRIGGER_AUDIO)
   7
   8#include <linux/acpi.h>
   9#include <linux/leds.h>
  10
  11static void (*old_vmaster_hook)(void *, int);
  12
  13static bool is_thinkpad(struct hda_codec *codec)
  14{
  15        return (codec->core.subsystem_id >> 16 == 0x17aa) &&
  16               (acpi_dev_found("LEN0068") || acpi_dev_found("LEN0268") ||
  17                acpi_dev_found("IBM0068"));
  18}
  19
  20static void update_tpacpi_mute_led(void *private_data, int enabled)
  21{
  22        if (old_vmaster_hook)
  23                old_vmaster_hook(private_data, enabled);
  24
  25        ledtrig_audio_set(LED_AUDIO_MUTE, enabled ? LED_OFF : LED_ON);
  26}
  27
  28static void hda_fixup_thinkpad_acpi(struct hda_codec *codec,
  29                                    const struct hda_fixup *fix, int action)
  30{
  31        struct hda_gen_spec *spec = codec->spec;
  32
  33        if (action == HDA_FIXUP_ACT_PROBE) {
  34                if (!is_thinkpad(codec))
  35                        return;
  36                old_vmaster_hook = spec->vmaster_mute.hook;
  37                spec->vmaster_mute.hook = update_tpacpi_mute_led;
  38                snd_hda_gen_fixup_micmute_led(codec, fix, action);
  39        }
  40}
  41
  42#else /* CONFIG_THINKPAD_ACPI */
  43
  44static void hda_fixup_thinkpad_acpi(struct hda_codec *codec,
  45                                    const struct hda_fixup *fix, int action)
  46{
  47}
  48
  49#endif /* CONFIG_THINKPAD_ACPI */
  50