diff options
| -rw-r--r-- | sound/soc/pxa/pxa-ssp.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/sound/soc/pxa/pxa-ssp.c b/sound/soc/pxa/pxa-ssp.c index 7fc13f03d1d2..52d97c4b82b1 100644 --- a/sound/soc/pxa/pxa-ssp.c +++ b/sound/soc/pxa/pxa-ssp.c @@ -522,6 +522,17 @@ static int pxa_ssp_set_dai_fmt(struct snd_soc_dai *cpu_dai, u32 sscr1; u32 sspsp; + /* check if we need to change anything at all */ + if (priv->dai_fmt == fmt) + return 0; + + /* we can only change the settings if the port is not in use */ + if (ssp_read_reg(ssp, SSCR0) & SSCR0_SSE) { + dev_err(&ssp->pdev->dev, + "can't change hardware dai format: stream is in use"); + return -EINVAL; + } + /* reset port settings */ sscr0 = ssp_read_reg(ssp, SSCR0) & (SSCR0_ECS | SSCR0_NCS | SSCR0_MOD | SSCR0_ACS); |