[PATCH] ASoC: dpcm: allow start or stop during pause for backend

[Vinod Koul]

Hello Gyeongtaek,

On 01-04-20, 10:04, �̰��� wrote:
> soc_compr_trigger_fe() allows start or stop after pause_push.
> In dpcm_be_dai_trigger(), however, only pause_release is allowed
> command after pause_push.
> So, start or stop after pause in compress offload is always
> returned as error if the compress offload is used with dpcm.
> To fix the problem, SND_SOC_DPCM_STATE_PAUSED should be allowed
> for start or stop command.

I think it makes sense to allow START if the stream is paused. Similarly
a STOP should be legal as well for paused stream, so:

Reviewed-by: Vinod Koul <vkoul at kernel.org>

> 
> Signed-off-by: Gyeongtaek Lee <gt82.lee at samsung.com>
> ---
>  sound/soc/soc-pcm.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
> index 2c59b3688ca0..8f6f0ad50288 100644
> --- a/sound/soc/soc-pcm.c
> +++ b/sound/soc/soc-pcm.c
> @@ -2236,7 +2236,8 @@ int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
>  		switch (cmd) {
>  		case SNDRV_PCM_TRIGGER_START:
>  			if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
> -			    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
> +			    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
> +			    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
>  				continue;
>  
>  			ret = dpcm_do_trigger(dpcm, be_substream, cmd);
> @@ -2266,7 +2267,8 @@ int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
>  			be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
>  			break;
>  		case SNDRV_PCM_TRIGGER_STOP:
> -			if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
> +			if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
> +			    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
>  				continue;
>  
>  			if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
> -- 
> 2.21.0
> 

-- 
~Vinod