ASoC: xlnx: support multiple sampling rates for SDI

This adds support for SDI playback at various supported sampling rates.

Signed-off-by: Maruthi Srinivas Bayyavarapu <maruthi.srinivas.bayyavarapu@xilinx.com>
Reviewed-by: Sandip Kothari <sandipk@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/sound/soc/xilinx/xlnx_pl_snd_card.c b/sound/soc/xilinx/xlnx_pl_snd_card.c
index 301c3e0c61e244bb4bc380e7cbe3002460d4f84e..e49e01eada6da21fff3080c88c4ac25a41a85bc4 100644 (file)
--- a/sound/soc/xilinx/xlnx_pl_snd_card.c
+++ b/sound/soc/xilinx/xlnx_pl_snd_card.c
@@ -41,6 +41,30 @@ static struct snd_soc_card xlnx_card = {
        .owner = THIS_MODULE,
 };
 
+static int xlnx_sdi_card_hw_params(struct snd_pcm_substream *substream,
+                                  struct snd_pcm_hw_params *params)
+{
+       struct snd_soc_pcm_runtime *rtd = substream->private_data;
+       struct pl_card_data *prv = snd_soc_card_get_drvdata(rtd->card);
+       u32 sample_rate = params_rate(params);
+
+       switch (sample_rate) {
+       case 32000:
+               prv->mclk_ratio = 576;
+               break;
+       case 44100:
+               prv->mclk_ratio = 418;
+               break;
+       case 48000:
+               prv->mclk_ratio = 384;
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
 static int xlnx_hdmi_card_hw_params(struct snd_pcm_substream *substream,
                                    struct snd_pcm_hw_params *params)
 {
@@ -135,6 +159,10 @@ static int xlnx_i2s_card_hw_params(struct snd_pcm_substream *substream,
        return ret;
 }
 
+static const struct snd_soc_ops xlnx_sdi_card_ops = {
+       .hw_params = xlnx_sdi_card_hw_params,
+};
+
 static const struct snd_soc_ops xlnx_i2s_card_ops = {
        .hw_params = xlnx_i2s_card_hw_params,
 };
@@ -177,6 +205,7 @@ static struct snd_soc_dai_link xlnx_snd_dai[][XLNX_MAX_PATHS] = {
                        .name = "xlnx-sdi-playback",
                        .codec_dai_name = "xlnx_sdi_tx",
                        .cpu_dai_name = "snd-soc-dummy-dai",
+                       .ops = &xlnx_sdi_card_ops,
                },
                {
                        .name = "xlnx-sdi-capture",