[alsa-devel] [PATCH 2/5] ASoC: twl6040: Prevent extra power transitions during resume

[Mark Brown]

On Fri, Jan 11, 2013 at 11:32:32AM +0100, Peter Ujfalusi wrote:

> -	twl6040_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
> -	twl6040_set_bias_level(codec, codec->dapm.suspend_bias_level);
> +	if (codec->dapm.bias_level != codec->dapm.suspend_bias_level) {
> +		twl6040_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
> +		twl6040_set_bias_level(codec, codec->dapm.suspend_bias_level);
> +	}

The device should always be in either _STANDBY or _OFF (depending on if
it supports idle_bias_off) before it tries to suspend so
suspend_bias_level ought to be redundant.  We should really get round to
killing it...
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