Re: [PATCH v3 4/6] ASoC: mediatek: mt7986: add machine driver with wm8960

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Il 28/07/23 11:49, AngeloGioacchino Del Regno ha scritto:
Il 28/07/23 11:08, Maso Huang ha scritto:
Add support for mt7986 board with wm8960.

Signed-off-by: Maso Huang <maso.huang@xxxxxxxxxxxx>
---
  sound/soc/mediatek/Kconfig                |  10 ++
  sound/soc/mediatek/mt7986/Makefile        |   1 +
  sound/soc/mediatek/mt7986/mt7986-wm8960.c | 184 ++++++++++++++++++++++
  3 files changed, 195 insertions(+)
  create mode 100644 sound/soc/mediatek/mt7986/mt7986-wm8960.c

diff --git a/sound/soc/mediatek/Kconfig b/sound/soc/mediatek/Kconfig
index 558827755a8d..8d1bc8814486 100644
--- a/sound/soc/mediatek/Kconfig
+++ b/sound/soc/mediatek/Kconfig
@@ -64,6 +64,16 @@ config SND_SOC_MT7986
        Select Y if you have such device.
        If unsure select "N".
+config SND_SOC_MT7986_WM8960
+    tristate "ASoc Audio driver for MT7986 with WM8960 codec"
+    depends on SND_SOC_MT7986 && I2C
+    select SND_SOC_WM8960
+    help
+      This adds support for ASoC machine driver for MediaTek MT7986
+      boards with the WM8960 codecs.
+      Select Y if you have such device.
+      If unsure select "N".
+
  config SND_SOC_MT8173
      tristate "ASoC support for Mediatek MT8173 chip"
      depends on ARCH_MEDIATEK
diff --git a/sound/soc/mediatek/mt7986/Makefile b/sound/soc/mediatek/mt7986/Makefile
index de0742a67cae..fc4c82559b29 100644
--- a/sound/soc/mediatek/mt7986/Makefile
+++ b/sound/soc/mediatek/mt7986/Makefile
@@ -6,3 +6,4 @@ snd-soc-mt7986-afe-objs := \
      mt7986-dai-etdm.o
  obj-$(CONFIG_SND_SOC_MT7986) += snd-soc-mt7986-afe.o
+obj-$(CONFIG_SND_SOC_MT7986_WM8960) += mt7986-wm8960.o
diff --git a/sound/soc/mediatek/mt7986/mt7986-wm8960.c b/sound/soc/mediatek/mt7986/mt7986-wm8960.c
new file mode 100644
index 000000000000..a880fcb8662e
--- /dev/null
+++ b/sound/soc/mediatek/mt7986/mt7986-wm8960.c

..snip..

+static int mt7986_wm8960_machine_probe(struct platform_device *pdev)
+{
+    struct snd_soc_card *card = &mt7986_wm8960_card;
+    struct snd_soc_dai_link *dai_link;
+    struct mt7986_wm8960_priv *priv;
+    int ret, i;
+
+    priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+    if (!priv)
+        return -ENOMEM;
+
+    priv->platform_node = of_parse_phandle(pdev->dev.of_node,
+                           "mediatek,platform", 0);
+    if (!priv->platform_node) {
+        dev_err(&pdev->dev, "Property 'platform' missing or invalid\n");
+        return -EINVAL;
+    }
+
+    for_each_card_prelinks(card, i, dai_link) {
+        if (dai_link->platforms->name)
+            continue;
+        dai_link->platforms->of_node = priv->platform_node;
+    }
+
+    card->dev = &pdev->dev;
+
+    priv->codec_node = of_parse_phandle(pdev->dev.of_node,
+                        "mediatek,audio-codec", 0);
+    if (!priv->codec_node) {
+        dev_err(&pdev->dev,
+            "Property 'audio-codec' missing or invalid\n");
+        of_node_put(priv->platform_node);
+        return -EINVAL;
+    }
+
+    for_each_card_prelinks(card, i, dai_link) {
+        if (dai_link->codecs->name)
+            continue;
+        dai_link->codecs->of_node = priv->codec_node;
+    }
+
+    ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
+    if (ret) {
+        dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
+        goto err_of_node_put;
+    }
+
+    ret = devm_snd_soc_register_card(&pdev->dev, card);
+    if (ret) {
+        dev_err(&pdev->dev, "%s snd_soc_register_card fail %d\n",
+            __func__, ret);
+        goto err_of_node_put;
+    }
+
+err_of_node_put:
+    of_node_put(priv->codec_node);
+    of_node_put(priv->platform_node);
+    return ret;
+}
+
+static void mt7986_wm8960_machine_remove(struct platform_device *pdev)
+{
+    struct snd_soc_card *card = platform_get_drvdata(pdev);
+    struct mt7986_wm8960_priv *priv = snd_soc_card_get_drvdata(card);
+
+    of_node_put(priv->codec_node);
+    of_node_put(priv->platform_node);
+}
+
+#ifdef CONFIG_OF

Your probe function *relies on* devicetree, and you're adding an ifdef for
CONFIG_OF? That wouldn't make sense, would it? ;-)

+static const struct of_device_id mt7986_wm8960_machine_dt_match[] = {
+    {.compatible = "mediatek,mt7986-wm8960-machine",},

please...

{ .compatible = "mediatek,mt7986-wm8960-machine" },

Actually, I noticed that just after sending the review.

Can you also please change the compatible, as "machine" doesn't really
mean "sound"? :-)

.compatible = "mediatek,mt7986-wm8960-sound"

Thanks!


+    { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, mt7986_wm8960_machine_dt_match);
+#endif
+
+static struct platform_driver mt7986_wm8960_machine = {
+    .driver = {
+        .name = "mt7986-wm8960",
+#ifdef CONFIG_OF

Check `struct device_driver`: const struct of_device_id *of_match_table is
always present, there's no ifdef.... and that's done in order to avoid seeing
a bunch of ifdefs in drivers...

...so, why is this callback enclosed in an ifdef?

Please drop all those ifdefs.


After addressing those last comments, you can get my

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>

Regards,
Angelo




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