codec->power_jiffies += delta;
}
-/**
- * snd_hda_power_up - Power-up the codec
- * @codec: HD-audio codec
- *
- * Increment the power-up counter and power up the hardware really when
- * not turned on yet.
- */
-void snd_hda_power_up(struct hda_codec *codec)
+/* Transition to powered up, if wait_power_down then wait for a pending
+ * transition to D3 to complete. A pending D3 transition is indicated
+ * with power_transition == -1. */
+static void __snd_hda_power_up(struct hda_codec *codec, bool wait_power_down)
{
struct hda_bus *bus = codec->bus;
spin_lock(&codec->power_lock);
codec->power_count++;
- if (codec->power_on || codec->power_transition > 0) {
+ /* Return if power_on or transitioning to power_on, unless currently
+ * powering down. */
+ if ((codec->power_on || codec->power_transition > 0) &&
+ !(wait_power_down && codec->power_transition < 0)) {
spin_unlock(&codec->power_lock);
return;
}
codec->power_transition = 0;
spin_unlock(&codec->power_lock);
}
+
+/**
+ * snd_hda_power_up - Power-up the codec
+ * @codec: HD-audio codec
+ *
+ * Increment the power-up counter and power up the hardware really when
+ * not turned on yet.
+ */
+void snd_hda_power_up(struct hda_codec *codec)
+{
+ __snd_hda_power_up(codec, false);
+}
EXPORT_SYMBOL_HDA(snd_hda_power_up);
+/**
+ * snd_hda_power_up_d3wait - Power-up the codec after waiting for any pending
+ * D3 transition to complete. This differs from snd_hda_power_up() when
+ * power_transition == -1. snd_hda_power_up sees this case as a nop,
+ * snd_hda_power_up_d3wait waits for the D3 transition to complete then powers
+ * back up.
+ * @codec: HD-audio codec
+ *
+ * Cancel any power down operation hapenning on the work queue, then power up.
+ */
+void snd_hda_power_up_d3wait(struct hda_codec *codec)
+{
+ /* This will cancel and wait for pending power_work to complete. */
+ __snd_hda_power_up(codec, true);
+}
+EXPORT_SYMBOL_HDA(snd_hda_power_up_d3wait);
+
#define power_save(codec) \
((codec)->bus->power_save ? *(codec)->bus->power_save : 0)
*/
#ifdef CONFIG_SND_HDA_POWER_SAVE
void snd_hda_power_up(struct hda_codec *codec);
+void snd_hda_power_up_d3wait(struct hda_codec *codec);
void snd_hda_power_down(struct hda_codec *codec);
void snd_hda_update_power_acct(struct hda_codec *codec);
#else
static inline void snd_hda_power_up(struct hda_codec *codec) {}
+static inline void snd_hda_power_up_d3wait(struct hda_codec *codec) {}
static inline void snd_hda_power_down(struct hda_codec *codec) {}
#endif