ASoC: samsung: Add support for HDMI audio on TM2 board

This patch defines I2S1 - HDMI DAI link and implements related
hw_params callback. The AUD PLL frequency is configured through
the CLK_SCLK_I2S1 leaf clock, the exynos5433 clock tree
definitions are updated in a separate patch.

The device tree parsing part is changed is a way it supports older
DTBs with just a single CPU DAI specified, without the HDMI link.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/samsung/tm2_wm5110.c b/sound/soc/samsung/tm2_wm5110.c
index a55d187..b6a492f 100644 (file)
--- a/sound/soc/samsung/tm2_wm5110.c
+++ b/sound/soc/samsung/tm2_wm5110.c
@@ -210,6 +210,59 @@ static struct snd_soc_ops tm2_aif2_ops = {
        .hw_free = tm2_aif2_hw_free,
 };
 
+static int tm2_hdmi_hw_params(struct snd_pcm_substream *substream,
+                             struct snd_pcm_hw_params *params)
+{
+       struct snd_soc_pcm_runtime *rtd = substream->private_data;
+       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+       unsigned int bfs;
+       int bitwidth, ret;
+
+       bitwidth = snd_pcm_format_width(params_format(params));
+       if (bitwidth < 0) {
+               dev_err(rtd->card->dev, "Invalid bit-width: %d\n", bitwidth);
+               return bitwidth;
+       }
+
+       switch (bitwidth) {
+       case 48:
+               bfs = 64;
+               break;
+       case 16:
+               bfs = 32;
+               break;
+       default:
+               dev_err(rtd->card->dev, "Unsupported bit-width: %d\n", bitwidth);
+               return -EINVAL;
+       }
+
+       switch (params_rate(params)) {
+       case 48000:
+       case 96000:
+       case 192000:
+               break;
+       default:
+               dev_err(rtd->card->dev, "Unsupported sample rate: %d\n",
+                       params_rate(params));
+               return -EINVAL;
+       }
+
+       ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_OPCLK,
+                                       0, SAMSUNG_I2S_OPCLK_PCLK);
+       if (ret < 0)
+               return ret;
+
+       ret = snd_soc_dai_set_clkdiv(cpu_dai, SAMSUNG_I2S_DIV_BCLK, bfs);
+       if (ret < 0)
+               return ret;
+
+       return 0;
+}
+
+static struct snd_soc_ops tm2_hdmi_ops = {
+       .hw_params = tm2_hdmi_hw_params,
+};
+
 static int tm2_mic_bias(struct snd_soc_dapm_widget *w,
                                struct snd_kcontrol *kcontrol, int event)
 {
@@ -405,6 +458,12 @@ static struct snd_soc_dai_link tm2_dai_links[] = {
                .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
                                  SND_SOC_DAIFMT_CBM_CFM,
                .ignore_suspend = 1,
+       }, {
+               .name           = "HDMI",
+               .stream_name    = "i2s1",
+               .ops            = &tm2_hdmi_ops,
+               .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+                                 SND_SOC_DAIFMT_CBS_CFS,
        }
 };
 
@@ -412,7 +471,6 @@ static struct snd_soc_card tm2_card = {
        .owner                  = THIS_MODULE,
 
        .dai_link               = tm2_dai_links,
-       .num_links              = ARRAY_SIZE(tm2_dai_links),
        .controls               = tm2_controls,
        .num_controls           = ARRAY_SIZE(tm2_controls),
        .dapm_widgets           = tm2_dapm_widgets,
@@ -426,11 +484,14 @@ static struct snd_soc_card tm2_card = {
 
 static int tm2_probe(struct platform_device *pdev)
 {
+       struct device_node *cpu_dai_node[2] = {};
+       struct device_node *codec_dai_node[2] = {};
+       const char *cells_name = NULL;
        struct device *dev = &pdev->dev;
        struct snd_soc_card *card = &tm2_card;
        struct tm2_machine_priv *priv;
-       struct device_node *cpu_dai_node, *codec_dai_node;
-       int ret, i;
+       struct of_phandle_args args;
+       int num_codecs, ret, i;
 
        priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
        if (!priv)
@@ -464,47 +525,92 @@ static int tm2_probe(struct platform_device *pdev)
                return -EINVAL;
        }
 
-       cpu_dai_node = of_parse_phandle(dev->of_node, "i2s-controller", 0);
-       if (!cpu_dai_node) {
-               dev_err(dev, "i2s-controllers property invalid or missing\n");
-               ret = -EINVAL;
-               goto amp_node_put;
+       num_codecs = of_count_phandle_with_args(dev->of_node, "audio-codec",
+                                                NULL);
+
+       /* Skip the HDMI link if not specified in DT */
+       if (num_codecs > 1) {
+               card->num_links = ARRAY_SIZE(tm2_dai_links);
+               cells_name = "#sound-dai-cells";
+       } else {
+               card->num_links = ARRAY_SIZE(tm2_dai_links) - 1;
        }
 
-       codec_dai_node = of_parse_phandle(dev->of_node, "audio-codec", 0);
-       if (!codec_dai_node) {
-               dev_err(dev, "audio-codec property invalid or missing\n");
-               ret = -EINVAL;
-               goto cpu_dai_node_put;
+       for (i = 0; i < num_codecs; i++) {
+               struct of_phandle_args args;
+
+               ret = of_parse_phandle_with_args(dev->of_node, "i2s-controller",
+                                                cells_name, i, &args);
+               if (!args.np) {
+                       dev_err(dev, "i2s-controller property parse error: %d\n", i);
+                       ret = -EINVAL;
+                       goto dai_node_put;
+               }
+               cpu_dai_node[i] = args.np;
+
+               codec_dai_node[i] = of_parse_phandle(dev->of_node,
+                                                    "audio-codec", i);
+               if (!codec_dai_node[i]) {
+                       dev_err(dev, "audio-codec property parse error\n");
+                       ret = -EINVAL;
+                       goto dai_node_put;
+               }
        }
 
+       /* Initialize WM5110 - I2S and HDMI - I2S1 DAI links */
        for (i = 0; i < card->num_links; i++) {
+               unsigned int dai_index = 0; /* WM5110 */
+
                card->dai_link[i].cpu_name = NULL;
                card->dai_link[i].platform_name = NULL;
-               card->dai_link[i].codec_of_node = codec_dai_node;
-               card->dai_link[i].cpu_of_node = cpu_dai_node;
-               card->dai_link[i].platform_of_node = cpu_dai_node;
+
+               if (num_codecs > 1 && i == card->num_links - 1)
+                       dai_index = 1; /* HDMI */
+
+               card->dai_link[i].codec_of_node = codec_dai_node[dai_index];
+               card->dai_link[i].cpu_of_node = cpu_dai_node[dai_index];
+               card->dai_link[i].platform_of_node = cpu_dai_node[dai_index];
+       }
+
+       if (num_codecs > 1) {
+               /* HDMI DAI link (I2S1) */
+               i = card->num_links - 1;
+
+               ret = of_parse_phandle_with_fixed_args(dev->of_node,
+                                               "audio-codec", 0, 1, &args);
+               if (ret) {
+                       dev_err(dev, "audio-codec property parse error\n");
+                       goto dai_node_put;
+               }
+
+               ret = snd_soc_get_dai_name(&args, &card->dai_link[i].codec_dai_name);
+               if (ret) {
+                       dev_err(dev, "Unable to get codec_dai_name\n");
+                       goto dai_node_put;
+               }
        }
 
        ret = devm_snd_soc_register_component(dev, &tm2_component,
                                tm2_ext_dai, ARRAY_SIZE(tm2_ext_dai));
        if (ret < 0) {
                dev_err(dev, "Failed to register component: %d\n", ret);
-               goto codec_dai_node_put;
+               goto dai_node_put;
        }
 
        ret = devm_snd_soc_register_card(dev, card);
        if (ret < 0) {
                dev_err(dev, "Failed to register card: %d\n", ret);
-               goto codec_dai_node_put;
+               goto dai_node_put;
+       }
+
+dai_node_put:
+       for (i = 0; i < num_codecs; i++) {
+               of_node_put(codec_dai_node[i]);
+               of_node_put(cpu_dai_node[i]);
        }
 
-codec_dai_node_put:
-       of_node_put(codec_dai_node);
-cpu_dai_node_put:
-       of_node_put(cpu_dai_node);
-amp_node_put:
        of_node_put(card->aux_dev[0].codec_of_node);
+
        return ret;
 }