1 /* Helper functions for Thinkpad LED control; 2 * to be included from codec driver 3 */ 4 5 #if IS_ENABLED(CONFIG_THINKPAD_ACPI) 6 7 #include <linux/acpi.h> 8 #include <linux/thinkpad_acpi.h> 9 10 static int (*led_set_func)(int, bool); 11 static void (*old_vmaster_hook)(void *, int); 12 13 static 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 20 static 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 if (led_set_func) 26 led_set_func(TPACPI_LED_MUTE, !enabled); 27 } 28 29 static void update_tpacpi_micmute_led(struct hda_codec *codec, 30 struct snd_kcontrol *kcontrol, 31 struct snd_ctl_elem_value *ucontrol) 32 { 33 if (!ucontrol || !led_set_func) 34 return; 35 if (strcmp("Capture Switch", ucontrol->id.name) == 0 && ucontrol->id.index == 0) { 36 /* TODO: How do I verify if it's a mono or stereo here? */ 37 bool val = ucontrol->value.integer.value[0] || ucontrol->value.integer.value[1]; 38 led_set_func(TPACPI_LED_MICMUTE, !val); 39 } 40 } 41 42 static void hda_fixup_thinkpad_acpi(struct hda_codec *codec, 43 const struct hda_fixup *fix, int action) 44 { 45 struct hda_gen_spec *spec = codec->spec; 46 bool removefunc = false; 47 48 if (action == HDA_FIXUP_ACT_PROBE) { 49 if (!is_thinkpad(codec)) 50 return; 51 if (!led_set_func) 52 led_set_func = symbol_request(tpacpi_led_set); 53 if (!led_set_func) { 54 codec_warn(codec, 55 "Failed to find thinkpad-acpi symbol tpacpi_led_set\n"); 56 return; 57 } 58 59 removefunc = true; 60 if (led_set_func(TPACPI_LED_MUTE, false) >= 0) { 61 old_vmaster_hook = spec->vmaster_mute.hook; 62 spec->vmaster_mute.hook = update_tpacpi_mute_led; 63 removefunc = false; 64 } 65 if (led_set_func(TPACPI_LED_MICMUTE, false) >= 0) { 66 if (spec->num_adc_nids > 1 && !spec->dyn_adc_switch) 67 codec_dbg(codec, 68 "Skipping micmute LED control due to several ADCs"); 69 else { 70 spec->cap_sync_hook = update_tpacpi_micmute_led; 71 removefunc = false; 72 } 73 } 74 } 75 76 if (led_set_func && (action == HDA_FIXUP_ACT_FREE || removefunc)) { 77 symbol_put(tpacpi_led_set); 78 led_set_func = NULL; 79 old_vmaster_hook = NULL; 80 } 81 } 82 83 #else /* CONFIG_THINKPAD_ACPI */ 84 85 static void hda_fixup_thinkpad_acpi(struct hda_codec *codec, 86 const struct hda_fixup *fix, int action) 87 { 88 } 89 90 #endif /* CONFIG_THINKPAD_ACPI */ 91