Hi,
On Thu, Jul 03, 2014 at 09:57:39AM -0500, Dan Murphy wrote:
On 07/03/2014 09:52 AM, Felipe Balbi wrote:
Hi,
On Thu, Jul 03, 2014 at 09:39:53AM -0500, Dan Murphy wrote:
+static int tas2552_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt) +{
- u8 serial_format;
- struct snd_soc_codec *codec = dai->codec;
- switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
- case SND_SOC_DAIFMT_CBS_CFS:
serial_format = 0x00;break;- case SND_SOC_DAIFMT_CBS_CFM:
serial_format = TAS2552_WORD_CLK_MASK;break;- case SND_SOC_DAIFMT_CBM_CFS:
serial_format = TAS2552_BIT_CLK_MASK;break;- case SND_SOC_DAIFMT_CBM_CFM:
serial_format = (TAS2552_BIT_CLK_MASK | TAS2552_WORD_CLK_MASK);break;- default:
return -EINVAL;- }
- pm_runtime_get_sync(codec->dev);
- snd_soc_update_bits(codec, TAS2552_SER_CTRL_1,
(TAS2552_BIT_CLK_MASK | TAS2552_WORD_CLK_MASK),serial_format);- pm_runtime_put(codec->dev);
I have a feeling it's better to just put at the end of the function. Remember your pm_runtime_put() will issue i2c transfers which can take a looooooong time ;-)
I thought about that but the next switch case could return if the format mask is invalid which means the runtime calls would not be balanced.
So I decided to wrap the snd_soc calls with the pm_runtime calls to keep it balanced.
it looks like you can do both switch statements outside of the pm_runtime region and cache results on serial_format and do a single write to CTRL_1 register (?). If not, then just use two local variables.