MLK-17344-1: ASoC: imx-cdnhdmi: get constraint rate from dts

Constraint rate depends on the clock rata of cpu dai, which is
defined in dts, so we add constraint-rate property in dts, then
driver can get it.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>

diff --git a/sound/soc/fsl/imx-cdnhdmi.c b/sound/soc/fsl/imx-cdnhdmi.c
index 7cb8ad4..0bd7278 100644 (file)
--- a/sound/soc/fsl/imx-cdnhdmi.c
+++ b/sound/soc/fsl/imx-cdnhdmi.c
@@ -32,23 +32,23 @@ struct imx_cdnhdmi_data {
        struct snd_soc_dai_link dai;
        struct snd_soc_card card;
        int protocol;
+       u32 support_rates[SUPPORT_RATE_NUM];
+       u32 support_rates_num;
 };
 
 static int imx_cdnhdmi_startup(struct snd_pcm_substream *substream)
 {
        struct snd_pcm_runtime *runtime = substream->runtime;
+       struct snd_soc_pcm_runtime *rtd = substream->private_data;
+       struct snd_soc_card *card = rtd->card;
+       struct imx_cdnhdmi_data *data = snd_soc_card_get_drvdata(card);
        static struct snd_pcm_hw_constraint_list constraint_rates;
        static struct snd_pcm_hw_constraint_list constraint_channels;
-       static u32 support_rates[SUPPORT_RATE_NUM];
        static u32 support_channels[SUPPORT_CHANNEL_NUM];
        int ret;
 
-       support_rates[0] = 48000;
-       support_rates[1] = 96000;
-       support_rates[2] = 32000;
-       support_rates[3] = 192000;
-       constraint_rates.list = support_rates;
-       constraint_rates.count = 4;
+       constraint_rates.list = data->support_rates;
+       constraint_rates.count = data->support_rates_num;
 
        ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
                                                &constraint_rates);
@@ -123,6 +123,7 @@ static int imx_cdnhdmi_probe(struct platform_device *pdev)
        struct platform_device *cpu_pdev;
        struct imx_cdnhdmi_data *data;
        int ret;
+       int i;
 
        cpu_np = of_parse_phandle(pdev->dev.of_node, "audio-cpu", 0);
        if (!cpu_np) {
@@ -144,6 +145,24 @@ static int imx_cdnhdmi_probe(struct platform_device *pdev)
                goto fail;
        }
 
+       for (i = 0; i < SUPPORT_RATE_NUM; i++) {
+               ret = of_property_read_u32_index(pdev->dev.of_node,
+                                               "constraint-rate",
+                                               i, &data->support_rates[i]);
+               if (!ret)
+                       data->support_rates_num = i + 1;
+               else
+                       break;
+       }
+
+       if (data->support_rates_num == 0) {
+               data->support_rates[0] = 48000;
+               data->support_rates[1] = 96000;
+               data->support_rates[2] = 32000;
+               data->support_rates[3] = 192000;
+               data->support_rates_num = 4;
+       }
+
        of_property_read_u32(pdev->dev.of_node, "protocol",
                                        &data->protocol);