ASoC: qdsp6: q6asm-dai: only enable dais from device tree

Existing code enables all the playback and capture dais even
if there is no device tree entry. This can lead to
un-necessary dais in the system which will never be used.
So honour whats specfied in device tree.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200311180422.28363-2-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/qcom/qdsp6/q6asm-dai.c b/sound/soc/qcom/qdsp6/q6asm-dai.c
index c0d422d..8b48815 100644 (file)
--- a/sound/soc/qcom/qdsp6/q6asm-dai.c
+++ b/sound/soc/qcom/qdsp6/q6asm-dai.c
@@ -69,6 +69,8 @@ struct q6asm_dai_rtd {
 };
 
 struct q6asm_dai_data {
+       struct snd_soc_dai_driver *dais;
+       int num_dais;
        long long int sid;
 };
 
@@ -889,7 +891,7 @@ static const struct snd_soc_component_driver q6asm_fe_dai_component = {
        .compr_ops      = &q6asm_dai_compr_ops,
 };
 
-static struct snd_soc_dai_driver q6asm_fe_dais[] = {
+static struct snd_soc_dai_driver q6asm_fe_dais_template[] = {
        Q6ASM_FEDAI_DRIVER(1),
        Q6ASM_FEDAI_DRIVER(2),
        Q6ASM_FEDAI_DRIVER(3),
@@ -903,10 +905,22 @@ static struct snd_soc_dai_driver q6asm_fe_dais[] = {
 static int of_q6asm_parse_dai_data(struct device *dev,
                                    struct q6asm_dai_data *pdata)
 {
-       static struct snd_soc_dai_driver *dai_drv;
+       struct snd_soc_dai_driver *dai_drv;
        struct snd_soc_pcm_stream empty_stream;
        struct device_node *node;
-       int ret, id, dir;
+       int ret, id, dir, idx = 0;
+
+
+       pdata->num_dais = of_get_child_count(dev->of_node);
+       if (!pdata->num_dais) {
+               dev_err(dev, "No dais found in DT\n");
+               return -EINVAL;
+       }
+
+       pdata->dais = devm_kcalloc(dev, pdata->num_dais, sizeof(*dai_drv),
+                                  GFP_KERNEL);
+       if (!pdata->dais)
+               return -ENOMEM;
 
        memset(&empty_stream, 0, sizeof(empty_stream));
 
@@ -917,7 +931,8 @@ static int of_q6asm_parse_dai_data(struct device *dev,
                        continue;
                }
 
-               dai_drv = &q6asm_fe_dais[id];
+               dai_drv = &pdata->dais[idx++];
+               *dai_drv = q6asm_fe_dais_template[id];
 
                ret = of_property_read_u32(node, "direction", &dir);
                if (ret)
@@ -955,11 +970,12 @@ static int q6asm_dai_probe(struct platform_device *pdev)
 
        dev_set_drvdata(dev, pdata);
 
-       of_q6asm_parse_dai_data(dev, pdata);
+       rc = of_q6asm_parse_dai_data(dev, pdata);
+       if (rc)
+               return rc;
 
        return devm_snd_soc_register_component(dev, &q6asm_fe_dai_component,
-                                       q6asm_fe_dais,
-                                       ARRAY_SIZE(q6asm_fe_dais));
+                                              pdata->dais, pdata->num_dais);
 }
 
 static const struct of_device_id q6asm_dai_device_id[] = {