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SubjectRe: [PATCH v5 6/9] ASoC: rockchip: Parse dai links from dts
On Tue, Aug 22, 2017 at 3:57 PM, Jeffy Chen <jeffy.chen@rock-chips.com> wrote:
> Refactor rockchip_sound_probe, parse dai links from dts instead of
> hard coding them.
>
> Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
> Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
> Tested-by: Matthias Kaehlcke <mka@chromium.org>
> ---
>
> Changes in v5: None
> Changes in v4: None
> Changes in v3:
> Use compatible to match audio codecs
> -- Suggested-by Matthias Kaehlcke <mka@chromium.org>
>
> 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 | 139 ++++++++++++++++++++++------------
> 1 file changed, 91 insertions(+), 48 deletions(-)
>
> diff --git a/sound/soc/rockchip/rk3399_gru_sound.c b/sound/soc/rockchip/rk3399_gru_sound.c
> index 9b7e28703bfb..d532336871d7 100644
> --- a/sound/soc/rockchip/rk3399_gru_sound.c
> +++ b/sound/soc/rockchip/rk3399_gru_sound.c
> @@ -235,14 +235,42 @@ static const struct snd_soc_ops rockchip_sound_da7219_ops = {
> .hw_params = rockchip_sound_da7219_hw_params,
> };
>
> +static struct snd_soc_card rockchip_sound_card = {
> + .name = "rk3399-gru-sound",
> + .owner = THIS_MODULE,
> + .dapm_widgets = rockchip_dapm_widgets,
> + .num_dapm_widgets = ARRAY_SIZE(rockchip_dapm_widgets),
> + .dapm_routes = rockchip_dapm_routes,
> + .num_dapm_routes = ARRAY_SIZE(rockchip_dapm_routes),
> + .controls = rockchip_controls,
> + .num_controls = ARRAY_SIZE(rockchip_controls),
> +};
> +
> enum {
> + DAILINK_DA7219,
> DAILINK_MAX98357A,
> DAILINK_RT5514,
> - DAILINK_DA7219,
> DAILINK_RT5514_DSP,
> };
>
> -static struct snd_soc_dai_link rockchip_dailinks[] = {
> +static const char * const dailink_compat[] = {
> + [DAILINK_DA7219] = "dlg,da7219",
> + [DAILINK_MAX98357A] = "maxim,max98357a",
> + [DAILINK_RT5514] = "realtek,rt5514-i2c",
> + [DAILINK_RT5514_DSP] = "realtek,rt5514-spi",
> +};
> +
> +static const struct snd_soc_dai_link rockchip_dais[] = {
> + [DAILINK_DA7219] = {
> + .name = "DA7219",
> + .stream_name = "DA7219 PCM",
> + .codec_dai_name = "da7219-hifi",
> + .init = rockchip_sound_da7219_init,
> + .ops = &rockchip_sound_da7219_ops,
> + /* set da7219 as slave */
> + .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
> + SND_SOC_DAIFMT_CBS_CFS,
> + },
> [DAILINK_MAX98357A] = {
> .name = "MAX98357A",
> .stream_name = "MAX98357A PCM",
> @@ -261,16 +289,6 @@ static struct snd_soc_dai_link rockchip_dailinks[] = {
> .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
> SND_SOC_DAIFMT_CBS_CFS,
> },
> - [DAILINK_DA7219] = {
> - .name = "DA7219",
> - .stream_name = "DA7219 PCM",
> - .codec_dai_name = "da7219-hifi",
> - .init = rockchip_sound_da7219_init,
> - .ops = &rockchip_sound_da7219_ops,
> - /* set da7219 as slave */
> - .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",
> @@ -279,53 +297,78 @@ 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,
> - .num_dapm_routes = ARRAY_SIZE(rockchip_dapm_routes),
> - .controls = rockchip_controls,
> - .num_controls = ARRAY_SIZE(rockchip_controls),
> -};
> -
> -static int rockchip_sound_probe(struct platform_device *pdev)
> +static int rockchip_sound_codec_node_match(struct device_node *np_codec)
> {
> - struct snd_soc_card *card = &rockchip_sound_card;
> - struct device_node *cpu_node;
> - int i, ret;
> + int i;
>
> - 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 < ARRAY_SIZE(dailink_compat); i++) {
> + if (of_device_is_compatible(np_codec, dailink_compat[i]))
> + return i;
> }
> + return -1;
> +}
>
> - for (i = 0; i < ARRAY_SIZE(rockchip_dailinks); i++) {
> - rockchip_dailinks[i].platform_of_node = cpu_node;
> - rockchip_dailinks[i].cpu_of_node = cpu_node;
> -
> - 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);
> +static int rockchip_sound_of_parse_dais(struct device *dev,
> + struct snd_soc_card *card)
> +{
> + struct device_node *np_cpu;
> + struct device_node *np_codec;
> + struct snd_soc_dai_link *dai;
> + int i, index;
> +
> + card->dai_link = devm_kzalloc(dev, sizeof(rockchip_dais),
> + GFP_KERNEL);
> + if (!card->dai_link)
> + return -ENOMEM;
> +
> + np_cpu = of_parse_phandle(dev->of_node, "rockchip,cpu", 0);
> +
> + card->num_links = 0;
> + for (i = 0; i < ARRAY_SIZE(rockchip_dais); i++) {
> + np_codec = of_parse_phandle(dev->of_node,
> + "rockchip,codec", i);
> + if (!np_codec)
> + break;
> +
> + if (!of_device_is_available(np_codec))
> + continue;
> +
> + index = rockchip_sound_codec_node_match(np_codec);
> + if (index < 0)
> + continue;
> +
> + if (!np_cpu) {
> + dev_err(dev, "Missing 'rockchip,cpu' for %s\n",
> + rockchip_dais[index].name);
> return -EINVAL;
> }
> +
> + dai = &card->dai_link[card->num_links++];
> + *dai = rockchip_dais[index];
> +
> + dai->codec_of_node = np_codec;
> + dai->platform_of_node = np_cpu;
> + dai->cpu_of_node = np_cpu;
> + }
> +
> + 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);
There is no need to call platform_set_drvdata, because
devm_snd_soc_register_card will do it.

>
> - 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[] = {
> --
> 2.11.0
>
>

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