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("IBM0068")); 17 } 18 19 static void update_tpacpi_mute_led(void *private_data, int enabled) 20 { 21 if (old_vmaster_hook) 22 old_vmaster_hook(private_data, enabled); 23 24 if (led_set_func) 25 led_set_func(TPACPI_LED_MUTE, !enabled); 26 } 27 28 static void update_tpacpi_micmute_led(struct hda_codec *codec, 29 struct snd_kcontrol *kcontrol, 30 struct snd_ctl_elem_value *ucontrol) 31 { 32 if (!ucontrol || !led_set_func) 33 return; 34 if (strcmp("Capture Switch", ucontrol->id.name) == 0 && ucontrol->id.index == 0) { 35 /* TODO: How do I verify if it's a mono or stereo here? */ 36 bool val = ucontrol->value.integer.value[0] || ucontrol->value.integer.value[1]; 37 led_set_func(TPACPI_LED_MICMUTE, !val); 38 } 39 } 40 41 static void hda_fixup_thinkpad_acpi(struct hda_codec *codec, 42 const struct hda_fixup *fix, int action) 43 { 44 struct hda_gen_spec *spec = codec->spec; 45 bool removefunc = false; 46 47 if (action == HDA_FIXUP_ACT_PROBE) { 48 if (!is_thinkpad(codec)) 49 return; 50 if (!led_set_func) 51 led_set_func = symbol_request(tpacpi_led_set); 52 if (!led_set_func) { 53 codec_warn(codec, 54 "Failed to find thinkpad-acpi symbol tpacpi_led_set\n"); 55 return; 56 } 57 58 removefunc = true; 59 if (led_set_func(TPACPI_LED_MUTE, false) >= 0) { 60 old_vmaster_hook = spec->vmaster_mute.hook; 61 spec->vmaster_mute.hook = update_tpacpi_mute_led; 62 removefunc = false; 63 } 64 if (led_set_func(TPACPI_LED_MICMUTE, false) >= 0) { 65 if (spec->num_adc_nids > 1 && !spec->dyn_adc_switch) 66 codec_dbg(codec, 67 "Skipping micmute LED control due to several ADCs"); 68 else { 69 spec->cap_sync_hook = update_tpacpi_micmute_led; 70 removefunc = false; 71 } 72 } 73 } 74 75 if (led_set_func && (action == HDA_FIXUP_ACT_FREE || removefunc)) { 76 symbol_put(tpacpi_led_set); 77 led_set_func = NULL; 78 old_vmaster_hook = NULL; 79 } 80 } 81 82 #else /* CONFIG_THINKPAD_ACPI */ 83 84 static void hda_fixup_thinkpad_acpi(struct hda_codec *codec, 85 const struct hda_fixup *fix, int action) 86 { 87 } 88 89 #endif /* CONFIG_THINKPAD_ACPI */ 90