diff options
-rw-r--r-- | include/linux/mfd/wm8994/pdata.h | 8 | ||||
-rw-r--r-- | sound/soc/codecs/wm8994.c | 13 |
2 files changed, 19 insertions, 2 deletions
diff --git a/include/linux/mfd/wm8994/pdata.h b/include/linux/mfd/wm8994/pdata.h index 8e21a09..68e7765 100644 --- a/include/linux/mfd/wm8994/pdata.h +++ b/include/linux/mfd/wm8994/pdata.h @@ -17,6 +17,7 @@ #define WM8994_NUM_LDO 2 #define WM8994_NUM_GPIO 11 +#define WM8994_NUM_AIF 3 struct wm8994_ldo_pdata { /** GPIOs to enable regulator, 0 or less if not available */ @@ -215,6 +216,13 @@ struct wm8994_pdata { * system. */ bool spkmode_pu; + + /** + * Maximum number of channels clocks will be generated for, + * useful for systems where and I2S bus with multiple data + * lines is mastered. + */ + int max_channels_clocked[WM8994_NUM_AIF]; }; #endif diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c index c9bd445..318ea64 100644 --- a/sound/soc/codecs/wm8994.c +++ b/sound/soc/codecs/wm8994.c @@ -2656,6 +2656,8 @@ static int wm8994_hw_params(struct snd_pcm_substream *substream, { struct snd_soc_codec *codec = dai->codec; struct wm8994_priv *wm8994 = snd_soc_codec_get_drvdata(codec); + struct wm8994 *control = wm8994->wm8994; + struct wm8994_pdata *pdata = &control->pdata; int aif1_reg; int aif2_reg; int bclk_reg; @@ -2723,7 +2725,14 @@ static int wm8994_hw_params(struct snd_pcm_substream *substream, } wm8994->channels[id] = params_channels(params); - switch (params_channels(params)) { + if (pdata->max_channels_clocked[id] && + wm8994->channels[id] > pdata->max_channels_clocked[id]) { + dev_dbg(dai->dev, "Constraining channels to %d from %d\n", + pdata->max_channels_clocked[id], wm8994->channels[id]); + wm8994->channels[id] = pdata->max_channels_clocked[id]; + } + + switch (wm8994->channels[id]) { case 1: case 2: bclk_rate *= 2; @@ -2745,7 +2754,7 @@ static int wm8994_hw_params(struct snd_pcm_substream *substream, dev_dbg(dai->dev, "AIF%dCLK is %dHz, target BCLK %dHz\n", dai->id, wm8994->aifclk[id], bclk_rate); - if (params_channels(params) == 1 && + if (wm8994->channels[id] == 1 && (snd_soc_read(codec, aif1_reg) & 0x18) == 0x18) aif2 |= WM8994_AIF1_MONO; |