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SubjectRe: [PATCH 06/22] ASoC: samsung: i2s: Restore support for the secondary PCM
On Thu, 7 Feb 2019 at 18:01, Sylwester Nawrocki <s.nawrocki@samsung.com> wrote:
>
> This patch introduces again registration of additional platform device as
> we still need it for registering the secondary dmaengine PCM component.
>
> This patch in most part is a revert of changes done in commit
> be2c92eb64023e ("ASoC: samsung: i2s: Remove virtual device for secondary DAI")
>
> Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
> ---
> sound/soc/samsung/i2s.c | 52 +++++++++++++++++++++++++++++++++++++----
> 1 file changed, 48 insertions(+), 4 deletions(-)
>
> diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c
> index 4bc3b181f1c2..994dcd4b01fb 100644
> --- a/sound/soc/samsung/i2s.c
> +++ b/sound/soc/samsung/i2s.c
> @@ -109,6 +109,7 @@ static DEFINE_SPINLOCK(lock);
>
> struct samsung_i2s_priv {
> struct platform_device *pdev;
> + struct platform_device *pdev_sec;
>
> /* Spinlock protecting access to the device's registers */
> spinlock_t spinlock;
> @@ -1312,6 +1313,34 @@ static int i2s_register_clock_provider(struct platform_device *pdev)
> return ret;
> }
>
> +/* Create platform device for the secondary PCM */
> +static int i2s_create_secondary_device(struct samsung_i2s_priv *priv)
> +{
> + struct platform_device *pdev;
> + int ret;
> +
> + pdev = platform_device_register_simple("samsung-i2s-sec", -1, NULL, 0);
> + if (!pdev)
> + return -ENOMEM;
> +
> + ret = device_attach(&pdev->dev);
> + if (ret < 0) {
> + dev_info(&pdev->dev, "device_attach() failed\n");
> + return ret;
> + }
> +
> + priv->pdev_sec = pdev;
> +
> + return 0;
> +}
> +
> +static void i2s_delete_secondary_device(struct samsung_i2s_priv *priv)
> +{
> + if (priv->pdev_sec) {
> + platform_device_del(priv->pdev_sec);
> + priv->pdev_sec = NULL;
> + }
> +}
> static int samsung_i2s_probe(struct platform_device *pdev)
> {
> struct i2s_dai *pri_dai, *sec_dai = NULL;
> @@ -1329,13 +1358,15 @@ static int samsung_i2s_probe(struct platform_device *pdev)
> i2s_dai_data = (struct samsung_i2s_dai_data *)
> platform_get_device_id(pdev)->driver_data;
>
> + /* Nothing to do if it is the secondary device probing */
> + if (!i2s_dai_data)
> + return 0;
> +
> priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
> if (!priv)
> return -ENOMEM;
>
> quirks = np ? i2s_dai_data->quirks : i2s_pdata->type.quirks;
> - quirks &= ~(QUIRK_SEC_DAI | QUIRK_SUPPORTS_IDMA);
> -
> num_dais = (quirks & QUIRK_SEC_DAI) ? 2 : 1;
> priv->pdev = pdev;
>
> @@ -1425,8 +1456,13 @@ static int samsung_i2s_probe(struct platform_device *pdev)
> sec_dai->pri_dai = pri_dai;
> pri_dai->sec_dai = sec_dai;
>
> - ret = samsung_asoc_dma_platform_register(&pdev->dev,
> - sec_dai->filter, "tx-sec", NULL, NULL);
> + ret = i2s_create_secondary_device(priv);
> + if (ret < 0)
> + goto err_disable_clk;
> +
> + ret = samsung_asoc_dma_platform_register(&priv->pdev_sec->dev,
> + sec_dai->filter, "tx-sec", NULL,
> + &pdev->dev);
> if (ret < 0)
> goto err_disable_clk;
>
> @@ -1461,6 +1497,7 @@ static int samsung_i2s_probe(struct platform_device *pdev)
> pm_runtime_disable(&pdev->dev);
> err_disable_clk:
> clk_disable_unprepare(pri_dai->clk);
> + i2s_delete_secondary_device(priv);
> return ret;
> }
>
> @@ -1469,12 +1506,16 @@ static int samsung_i2s_remove(struct platform_device *pdev)
> struct samsung_i2s_priv *priv = dev_get_drvdata(&pdev->dev);
> struct i2s_dai *pri_dai = samsung_i2s_get_pri_dai(&pdev->dev);
>
> + if (!priv)

This is not obvious. Maybe comment that it is secondary device remove()?

> + return 0;
> +
> pm_runtime_get_sync(&pdev->dev);
> pm_runtime_disable(&pdev->dev);
>
> i2s_unregister_clock_provider(pdev);
> clk_disable_unprepare(pri_dai->clk);
> pm_runtime_put_noidle(&pdev->dev);
> + i2s_delete_secondary_device(priv);
>
> return 0;
> }
> @@ -1573,6 +1614,9 @@ static const struct platform_device_id samsung_i2s_driver_ids[] = {
> .name = "samsung-i2s",
> .driver_data = (kernel_ulong_t)&i2sv3_dai_type,
> },
> + {

Nit - squash with previous line.

Acked-by: Krzysztof Kozlowski <krzk@kernel.org>

Best regards,
Krzysztof

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