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path: root/sound/pci/hda/dell_wmi_helper.c
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Diffstat (limited to 'sound/pci/hda/dell_wmi_helper.c')
-rw-r--r--sound/pci/hda/dell_wmi_helper.c76
1 files changed, 76 insertions, 0 deletions
diff --git a/sound/pci/hda/dell_wmi_helper.c b/sound/pci/hda/dell_wmi_helper.c
new file mode 100644
index 000000000000..9c22f95838ef
--- /dev/null
+++ b/sound/pci/hda/dell_wmi_helper.c
@@ -0,0 +1,76 @@
+/* Helper functions for Dell Mic Mute LED control;
+ * to be included from codec driver
+ */
+
+#if IS_ENABLED(CONFIG_LEDS_DELL_NETBOOKS)
+#include <linux/dell-led.h>
+
+static int dell_led_value;
+static int (*dell_led_set_func)(int, int);
+static void (*dell_old_cap_hook)(struct hda_codec *,
+ struct snd_kcontrol *,
+ struct snd_ctl_elem_value *);
+
+static void update_dell_wmi_micmute_led(struct hda_codec *codec,
+ struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ if (dell_old_cap_hook)
+ dell_old_cap_hook(codec, kcontrol, ucontrol);
+
+ if (!ucontrol || !dell_led_set_func)
+ return;
+ if (strcmp("Capture Switch", ucontrol->id.name) == 0 && ucontrol->id.index == 0) {
+ /* TODO: How do I verify if it's a mono or stereo here? */
+ int val = (ucontrol->value.integer.value[0] || ucontrol->value.integer.value[1]) ? 0 : 1;
+ if (val == dell_led_value)
+ return;
+ dell_led_value = val;
+ if (dell_led_set_func)
+ dell_led_set_func(DELL_LED_MICMUTE, dell_led_value);
+ }
+}
+
+
+static void alc_fixup_dell_wmi(struct hda_codec *codec,
+ const struct hda_fixup *fix, int action)
+{
+ struct alc_spec *spec = codec->spec;
+ bool removefunc = false;
+
+ if (action == HDA_FIXUP_ACT_PROBE) {
+ if (!dell_led_set_func)
+ dell_led_set_func = symbol_request(dell_app_wmi_led_set);
+ if (!dell_led_set_func) {
+ codec_warn(codec, "Failed to find dell wmi symbol dell_app_wmi_led_set\n");
+ return;
+ }
+
+ removefunc = true;
+ if (dell_led_set_func(DELL_LED_MICMUTE, false) >= 0) {
+ dell_led_value = 0;
+ if (spec->gen.num_adc_nids > 1)
+ codec_dbg(codec, "Skipping micmute LED control due to several ADCs");
+ else {
+ dell_old_cap_hook = spec->gen.cap_sync_hook;
+ spec->gen.cap_sync_hook = update_dell_wmi_micmute_led;
+ removefunc = false;
+ }
+ }
+
+ }
+
+ if (dell_led_set_func && (action == HDA_FIXUP_ACT_FREE || removefunc)) {
+ symbol_put(dell_app_wmi_led_set);
+ dell_led_set_func = NULL;
+ dell_old_cap_hook = NULL;
+ }
+}
+
+#else /* CONFIG_LEDS_DELL_NETBOOKS */
+static void alc_fixup_dell_wmi(struct hda_codec *codec,
+ const struct hda_fixup *fix, int action)
+{
+}
+
+#endif /* CONFIG_LEDS_DELL_NETBOOKS */