Hi Charles : This device driver (we use wm8973) can normally run on our platform. Anyway, I modify some part of our device driver. (msleep(100) => msleep(1000)) (Before msleep, it will call wm8971_set_bias_level(codec, codec->dapm.bias_level) first)
BR, Xavier
2014-09-02 18:00 GMT+08:00 Charles Keepax < ckeepax@opensource.wolfsonmicro.com>:
On Tue, Sep 02, 2014 at 11:27:47AM +0800, Xavier Hsu wrote:
This patch improves WM8971. We use msleep to replace work queue. "As suggested by Mark Brown"
Any comments about improving the patch are welcome. Thanks.
Signed-off-by: Xavier Hsu xavier.hsu@linaro.org Signed-off-by: Andy Green andy.green@linaro.org
sound/soc/codecs/wm8971.c | 25 ++----------------------- 1 file changed, 2 insertions(+), 23 deletions(-)
diff --git a/sound/soc/codecs/wm8971.c b/sound/soc/codecs/wm8971.c index 20cfdd3..68b4f52 100755 --- a/sound/soc/codecs/wm8971.c +++ b/sound/soc/codecs/wm8971.c @@ -36,8 +36,6 @@
#define WM8971_REG_COUNT 43
-static struct workqueue_struct *wm8971_workq;
/* codec private data */ struct wm8971_priv { unsigned int sysclk; @@ -774,16 +772,6 @@ static struct snd_soc_dai_driver wm8971_dai = { .ops = &wm8971_dai_ops, };
-static void wm8971_work(struct work_struct *work) -{
struct snd_soc_dapm_context *dapm =container_of(work, struct snd_soc_dapm_context,delayed_work.work);struct snd_soc_codec *codec = dapm->codec;wm8971_set_bias_level(codec, codec->dapm.bias_level);-}
static int wm8971_suspend(struct snd_soc_codec *codec) { wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF); @@ -801,8 +789,7 @@ static int wm8971_resume(struct snd_soc_codec *codec) reg = snd_soc_read(codec, WM8971_PWR1) & 0xfe3e; snd_soc_write(codec, WM8971_PWR1, reg | 0x01c0); codec->dapm.bias_level = SND_SOC_BIAS_ON;
queue_delayed_work(wm8971_workq, &codec->dapm.delayed_work,msecs_to_jiffies(1000));
msleep(100); } return 0;@@ -813,19 +800,13 @@ static int wm8971_probe(struct snd_soc_codec
*codec)
int ret = 0; u16 reg;
INIT_DELAYED_WORK(&codec->dapm.delayed_work, wm8971_work);wm8971_workq = create_workqueue("wm8971");if (wm8971_workq == NULL)return -ENOMEM;wm8971_reset(codec); /* charge output caps - set vmid to 5k for quick power up */ reg = snd_soc_read(codec, WM8971_PWR1) & 0xfe3e; snd_soc_write(codec, WM8971_PWR1, reg | 0x01c0); codec->dapm.bias_level = SND_SOC_BIAS_STANDBY;queue_delayed_work(wm8971_workq, &codec->dapm.delayed_work,msecs_to_jiffies(1000));
msleep(100);Does this patch actually work? You have taken out the queue_delayed_work and replaced it with a delay (which is 10x shorter than the delayed work version), but you haven't replaced the call to wm8971_set_bias_level that used to be in the delayed work?
/* set the update bits */ snd_soc_update_bits(codec, WM8971_LDAC, 0x0100, 0x0100);@@ -846,8 +827,6 @@ static int wm8971_remove(struct snd_soc_codec *codec) { wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF);
if (wm8971_workq)destroy_workqueue(wm8971_workq); return 0;}
--
Thanks, Charles