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Commit 1479c3fb authored by Mark Brown's avatar Mark Brown
Browse files

ASoC: Handle spurious wm_hubs DC servo done interrupts 



Don't assume the first fire indicates that we're done.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 6b3860b0

sound/soc/codecs/wm_hubs.c

+16 −14
Original line number Diff line number Diff line
@@ -66,8 +66,8 @@ static void wait_for_dc_servo(struct snd_soc_codec *codec, unsigned int op) 
	struct wm_hubs_data *hubs = snd_soc_codec_get_drvdata(codec);

	unsigned int reg;

	int count = 0;

	int timeout;

	unsigned int val;

	unsigned long timeout;



	val = op | WM8993_DCS_ENA_CHAN_0 | WM8993_DCS_ENA_CHAN_1;
@@ -76,21 +76,23 @@ static void wait_for_dc_servo(struct snd_soc_codec *codec, unsigned int op) 


	dev_dbg(codec->dev, "Waiting for DC servo...\n");



	if (hubs->dcs_done_irq) {

		timeout = wait_for_completion_timeout(&hubs->dcs_done,

						      msecs_to_jiffies(500));

		if (timeout == 0)

			dev_warn(codec->dev, "No DC servo interrupt\n");

	if (hubs->dcs_done_irq)

		timeout = 4;

	else

		timeout = 400;



		reg = snd_soc_read(codec, WM8993_DC_SERVO_0);

	} else {

	do {

		count++;



		if (hubs->dcs_done_irq)

			wait_for_completion_timeout(&hubs->dcs_done,

						    msecs_to_jiffies(250));

		else

			msleep(1);



		reg = snd_soc_read(codec, WM8993_DC_SERVO_0);

		dev_dbg(codec->dev, "DC servo: %x\n", reg);

		} while (reg & op && count < 400);

	}

	} while (reg & op && count < timeout);



	if (reg & op)

		dev_err(codec->dev, "Timed out waiting for DC Servo %x\n",