[PATCH v2 1/3] ASoC: rockchip: Parse dai links from dts
Matthias Kaehlcke
mka at chromium.org
Wed Aug 16 14:59:09 PDT 2017
El Thu, Aug 10, 2017 at 12:54:56PM +0800 Jeffy Chen ha dit:
> Refactor rockchip_sound_probe, parse dai links from dts instead of
> hard coding them.
Mark doesn't seem to be overly convinced that 'rockchip,codec-names'
is a good idea (https://lkml.org/lkml/2017/8/10/511).
How about using something like this instead:
static const char *dailink_compat[] = {
[DAILINK_MAX98357A] = "maxim,max98357a",
[DAILINK_RT5514] = "realtek,rt5514",
[DAILINK_DA7219] = "dlg,da7219",
};
...
static int rockchip_sound_probe(struct platform_device *pdev)
{
...
for (i = 0; ; i++) {
struct device_node *codec_node;
int j;
codec_node = of_parse_phandle(pdev->dev.of_node, "rockchip,codec", i);
if (!codec_node)
break;
for (j = 0; j < DAILINK_ENTITIES; j++) {
if (of_device_is_compatible(codec_node, dailink_compat[j]))
break;
}
if (j == DAILINK_ENTITIES) {
dev_err(...);
return -EINVAL;
}
rockchip_dailinks[j].codec_of_node = codec_node;
rockchip_dailinks[j].platform_of_node = cpu_node;
rockchip_dailinks[j].cpu_of_node = cpu_node;
/* not strictly needed, could also check for
rockchip_dailinks[DAILINK_RT5514].cpu_of_node or so
*/
if (j == DAILINK_RT5514)
has_rt5514 = true;
}
...
}
Matthias
> Signed-off-by: Jeffy Chen <jeffy.chen at rock-chips.com>
> ---
>
> Changes in v2:
> Let rockchip,codec-names be a required property, because we plan to
> add more supported codecs to the fixed dai link list in the driver.
>
> sound/soc/rockchip/rk3399_gru_sound.c | 125 ++++++++++++++++++++++------------
> 1 file changed, 81 insertions(+), 44 deletions(-)
>
> diff --git a/sound/soc/rockchip/rk3399_gru_sound.c b/sound/soc/rockchip/rk3399_gru_sound.c
> index 3475c61..03b7fae 100644
> --- a/sound/soc/rockchip/rk3399_gru_sound.c
> +++ b/sound/soc/rockchip/rk3399_gru_sound.c
> @@ -247,9 +247,7 @@ enum {
> DAILINK_RT5514_DSP,
> };
>
> -#define DAILINK_ENTITIES (DAILINK_DA7219 + 1)
> -
> -static struct snd_soc_dai_link rockchip_dailinks[] = {
> +static const struct snd_soc_dai_link rockchip_dais[] = {
> [DAILINK_MAX98357A] = {
> .name = "MAX98357A",
> .stream_name = "MAX98357A PCM",
> @@ -290,8 +288,6 @@ static struct snd_soc_dai_link rockchip_dailinks[] = {
> static struct snd_soc_card rockchip_sound_card = {
> .name = "rk3399-gru-sound",
> .owner = THIS_MODULE,
> - .dai_link = rockchip_dailinks,
> - .num_links = ARRAY_SIZE(rockchip_dailinks),
> .dapm_widgets = rockchip_dapm_widgets,
> .num_dapm_widgets = ARRAY_SIZE(rockchip_dapm_widgets),
> .dapm_routes = rockchip_dapm_routes,
> @@ -305,71 +301,112 @@ static int rockchip_sound_match_stub(struct device *dev, void *data)
> return 1;
> }
>
> -static int rockchip_sound_probe(struct platform_device *pdev)
> +static int rockchip_sound_of_parse_dais(struct device *dev,
> + struct snd_soc_card *card)
> {
> - struct snd_soc_card *card = &rockchip_sound_card;
> + struct device *rt5514_dev;
> + struct device_driver *rt5514_drv;
> 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);
> - if (!cpu_node) {
> - dev_err(&pdev->dev, "Property 'rockchip,cpu' missing or invalid\n");
> - return -EINVAL;
> - }
> -
> - for (i = 0; i < DAILINK_ENTITIES; i++) {
> - rockchip_dailinks[i].platform_of_node = cpu_node;
> - rockchip_dailinks[i].cpu_of_node = cpu_node;
> + struct device_node *np_codec;
> + struct snd_soc_dai_link *dai;
> + bool has_rt5514 = false;
> + int i, index, ret;
> +
> + card->dai_link = devm_kzalloc(dev, sizeof(rockchip_dais),
> + GFP_KERNEL);
> + if (!card->dai_link)
> + return -ENOMEM;
> +
> + cpu_node = of_parse_phandle(dev->of_node, "rockchip,cpu", 0);
> +
> + card->num_links = 0;
> + for (i = 0; i < DAILINK_RT5514_DSP; i++) {
> + index = of_property_match_string(dev->of_node,
> + "rockchip,codec-names",
> + rockchip_dais[i].name);
> + if (index < 0)
> + continue;
> +
> + np_codec = of_parse_phandle(dev->of_node,
> + "rockchip,codec", index);
> + if (!np_codec) {
> + dev_err(dev, "Missing 'rockchip,codec' for %s\n",
> + rockchip_dais[i].name);
> + return -EINVAL;
> + }
> + if (!of_device_is_available(np_codec))
> + continue;
>
> - rockchip_dailinks[i].codec_of_node =
> - of_parse_phandle(pdev->dev.of_node, "rockchip,codec", i);
> - if (!rockchip_dailinks[i].codec_of_node) {
> - dev_err(&pdev->dev,
> - "Property[%d] 'rockchip,codec' missing or invalid\n", i);
> + if (!cpu_node) {
> + dev_err(dev, "Missing 'rockchip,cpu' for %s\n",
> + rockchip_dais[i].name);
> return -EINVAL;
> }
> +
> + dai = &card->dai_link[card->num_links++];
> + *dai = rockchip_dais[i];
> +
> + dai->codec_of_node = np_codec;
> + dai->platform_of_node = cpu_node;
> + dai->cpu_of_node = cpu_node;
> +
> + if (i == DAILINK_RT5514)
> + has_rt5514 = true;
> }
>
> + if (!has_rt5514)
> + return 0;
> +
> /**
> * 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");
> + rt5514_drv = driver_find("rt5514", &spi_bus_type);
> + if (!rt5514_drv) {
> + dev_err(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");
> + rt5514_dev = driver_find_device(rt5514_drv, NULL, NULL,
> + rockchip_sound_match_stub);
> + if (!rt5514_dev) {
> + dev_err(dev, "Can not find the rt5514 device\n");
> return -ENODEV;
> }
>
> /* Set DMIC delay */
> - ret = device_property_read_u32(&pdev->dev, "dmic-delay",
> - &rt5514_dmic_delay);
> - if (ret) {
> + ret = device_property_read_u32(dev, "dmic-delay", &rt5514_dmic_delay);
> + if (ret < 0) {
> rt5514_dmic_delay = 0;
> - dev_dbg(&pdev->dev,
> + dev_dbg(dev,
> "no optional property 'dmic-delay' found, default: no delay\n");
> }
>
> - 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);
> + dai = &card->dai_link[card->num_links++];
> + *dai = rockchip_dais[DAILINK_RT5514_DSP];
> +
> + dai->cpu_name = devm_kstrdup(dev, dev_name(rt5514_dev), GFP_KERNEL);
> + dai->cpu_dai_name = dai->cpu_name;
> + dai->platform_name = dai->cpu_name;
> +
> + return 0;
> +}
> +
> +static int rockchip_sound_probe(struct platform_device *pdev)
> +{
> + struct snd_soc_card *card = &rockchip_sound_card;
> + int ret;
> +
> + ret = rockchip_sound_of_parse_dais(&pdev->dev, card);
> + if (ret < 0) {
> + dev_err(&pdev->dev, "Failed to parse dais: %d\n", ret);
> + return ret;
> + }
>
> card->dev = &pdev->dev;
> platform_set_drvdata(pdev, card);
>
> - 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);
> -
> - return ret;
> + return devm_snd_soc_register_card(&pdev->dev, card);
> }
>
> static const struct of_device_id rockchip_sound_of_match[] = {
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