ASoC: fsl-asoc-card: Add slot_width setting for cpu-dai

ESAI may need to use fixed slot width to comply with external
CODEC. So this set_tdm_slot() call will allow the ESAI driver
to override its default dynamic slot width policy.

Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/fsl/fsl-asoc-card.c b/sound/soc/fsl/fsl-asoc-card.c
index 14572e62dd51b0950043a0a4b4d4ddd6700cc9b2..3f6959c8e2f71b44cf054445b85553960e8c94d9 100644 (file)
--- a/sound/soc/fsl/fsl-asoc-card.c
+++ b/sound/soc/fsl/fsl-asoc-card.c
@@ -51,6 +51,7 @@ struct codec_priv {
  * @sysclk_freq[2]: SYSCLK rates for set_sysclk()
  * @sysclk_dir[2]: SYSCLK directions for set_sysclk()
  * @sysclk_id[2]: SYSCLK ids for set_sysclk()
+ * @slot_width: Slot width of each frame
  *
  * Note: [1] for tx and [0] for rx
  */
@@ -58,6 +59,7 @@ struct cpu_priv {
        unsigned long sysclk_freq[2];
        u32 sysclk_dir[2];
        u32 sysclk_id[2];
+       u32 slot_width;
 };
 
 /**
@@ -142,6 +144,15 @@ static int fsl_asoc_card_hw_params(struct snd_pcm_substream *substream,
                return ret;
        }
 
+       if (cpu_priv->slot_width) {
+               ret = snd_soc_dai_set_tdm_slot(rtd->cpu_dai, 0x3, 0x3, 2,
+                                              cpu_priv->slot_width);
+               if (ret) {
+                       dev_err(dev, "failed to set TDM slot for cpu dai\n");
+                       return ret;
+               }
+       }
+
        return 0;
 }
 
@@ -453,6 +464,7 @@ static int fsl_asoc_card_probe(struct platform_device *pdev)
                priv->cpu_priv.sysclk_freq[RX] = priv->codec_priv.mclk_freq;
                priv->cpu_priv.sysclk_dir[TX] = SND_SOC_CLOCK_OUT;
                priv->cpu_priv.sysclk_dir[RX] = SND_SOC_CLOCK_OUT;
+               priv->cpu_priv.slot_width = 32;
                priv->dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
        } else if (of_device_is_compatible(np, "fsl,imx-audio-sgtl5000")) {
                priv->codec_priv.mclk_id = SGTL5000_SYSCLK;