ASoC: rockchip: Add support rt5514 dsp summy dailink

This patch can attach automaticlly rt5514 spi DAI with driver name "rt5514"
in the snd_soc_find_dai process. Turn this feature on, we can enable the
voice wake up via rt5514 dsp for RK3399 Gru Boards.

Signed-off-by: Xing Zheng <zhengxing@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

2 files changed, 39 insertions, 1 deletions

diff --git a/sound/soc/rockchip/Kconfig b/sound/soc/rockchip/Kconfig
index 6d3903284a07..d82d763d4854 100644
--- a/sound/soc/rockchip/Kconfig
+++ b/sound/soc/rockchip/Kconfig
@@ -49,6 +49,7 @@ config SND_SOC_RK3399_GRU_SOUND
         select SND_SOC_MAX98357A
         select SND_SOC_RT5514
         select SND_SOC_DA7219
+        select SND_SOC_RT5514_SPI
         help
           Say Y or M here if you want to add support multiple codecs for SoC
           audio on Rockchip RK3399 GRU boards.
diff --git a/sound/soc/rockchip/rk3399_gru_sound.c b/sound/soc/rockchip/rk3399_gru_sound.c
index 9933703f7d44..164b6da4f2cf 100644
--- a/sound/soc/rockchip/rk3399_gru_sound.c
+++ b/sound/soc/rockchip/rk3399_gru_sound.c
@@ -230,8 +230,11 @@ enum {
         DAILINK_MAX98357A,
         DAILINK_RT5514,
         DAILINK_DA7219,
+        DAILINK_RT5514_DSP,
 };
 
+#define DAILINK_ENTITIES        (DAILINK_DA7219 + 1)
+
 static struct snd_soc_dai_link rockchip_dailinks[] = {
         [DAILINK_MAX98357A] = {
                 .name = "MAX98357A",
@@ -261,6 +264,13 @@ static struct snd_soc_dai_link rockchip_dailinks[] = {
                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
                         SND_SOC_DAIFMT_CBS_CFS,
         },
+        /* RT5514 DSP for voice wakeup via spi bus */
+        [DAILINK_RT5514_DSP] = {
+                .name = "RT5514 DSP",
+                .stream_name = "Wake on Voice",
+                .codec_name = "snd-soc-dummy",
+                .codec_dai_name = "snd-soc-dummy-dai",
+        },
 };
 
 static struct snd_soc_card rockchip_sound_card = {
@@ -276,10 +286,17 @@ static struct snd_soc_card rockchip_sound_card = {
         .num_controls = ARRAY_SIZE(rockchip_controls),
 };
 
+static int rockchip_sound_match_stub(struct device *dev, void *data)
+{
+        return 1;
+}
+
 static int rockchip_sound_probe(struct platform_device *pdev)
 {
         struct snd_soc_card *card = &rockchip_sound_card;
         struct device_node *cpu_node;
+        struct device *dev;
+        struct device_driver *drv;
         int i, ret;
 
         cpu_node = of_parse_phandle(pdev->dev.of_node, "rockchip,cpu", 0);
@@ -288,7 +305,7 @@ static int rockchip_sound_probe(struct platform_device *pdev)
                 return -EINVAL;
         }
 
-        for (i = 0; i < card->num_links; i++) {
+        for (i = 0; i < DAILINK_ENTITIES; i++) {
                 rockchip_dailinks[i].platform_of_node = cpu_node;
                 rockchip_dailinks[i].cpu_of_node = cpu_node;
 
@@ -301,6 +318,26 @@ static int rockchip_sound_probe(struct platform_device *pdev)
                 }
         }
 
+        /**
+         * To acquire the spi driver of the rt5514 and set the dai-links names
+         * for soc_bind_dai_link
+         */
+        drv = driver_find("rt5514", &spi_bus_type);
+        if (!drv) {
+                dev_err(&pdev->dev, "Can not find the rt5514 driver at the spi bus\n");
+                return -EINVAL;
+        }
+
+        dev = driver_find_device(drv, NULL, NULL, rockchip_sound_match_stub);
+        if (!dev) {
+                dev_err(&pdev->dev, "Can not find the rt5514 device\n");
+                return -ENODEV;
+        }
+
+        rockchip_dailinks[DAILINK_RT5514_DSP].cpu_name = kstrdup_const(dev_name(dev), GFP_KERNEL);
+        rockchip_dailinks[DAILINK_RT5514_DSP].cpu_dai_name = kstrdup_const(dev_name(dev), GFP_KERNEL);
+        rockchip_dailinks[DAILINK_RT5514_DSP].platform_name = kstrdup_const(dev_name(dev), GFP_KERNEL);
+
         card->dev = &pdev->dev;
         platform_set_drvdata(pdev, card);