add new system file

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2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/sound/soc/dwc/dwc-i2s.c
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@@ -132,13 +132,13 @@
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 		/* Error Handling: TX */
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 		if (isr[i] & ISR_TXFO) {
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-			dev_err(dev->dev, "TX overrun (ch_id=%d)\n", i);
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+			dev_err_ratelimited(dev->dev, "TX overrun (ch_id=%d)\n", i);
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 			irq_valid = true;
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 		}
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 		/* Error Handling: TX */
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 		if (isr[i] & ISR_RXFO) {
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-			dev_err(dev->dev, "RX overrun (ch_id=%d)\n", i);
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+			dev_err_ratelimited(dev->dev, "RX overrun (ch_id=%d)\n", i);
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 			irq_valid = true;
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 		}
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 	}
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@@ -181,30 +181,6 @@
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 		i2s_write_reg(dev->i2s_base, CER, 0);
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 		i2s_write_reg(dev->i2s_base, IER, 0);
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 	}
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-}
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-
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-static int dw_i2s_startup(struct snd_pcm_substream *substream,
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-		struct snd_soc_dai *cpu_dai)
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-{
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-	struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
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-	union dw_i2s_snd_dma_data *dma_data = NULL;
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-
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-	if (!(dev->capability & DWC_I2S_RECORD) &&
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-			(substream->stream == SNDRV_PCM_STREAM_CAPTURE))
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-		return -EINVAL;
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-
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-	if (!(dev->capability & DWC_I2S_PLAY) &&
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-			(substream->stream == SNDRV_PCM_STREAM_PLAYBACK))
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-		return -EINVAL;
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-
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-	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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-		dma_data = &dev->play_dma_data;
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-	else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
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-		dma_data = &dev->capture_dma_data;
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-
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-	snd_soc_dai_set_dma_data(cpu_dai, substream, (void *)dma_data);
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-
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-	return 0;
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 }
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 static void dw_i2s_config(struct dw_i2s_dev *dev, int stream)
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@@ -305,12 +281,6 @@
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 	return 0;
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 }
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-static void dw_i2s_shutdown(struct snd_pcm_substream *substream,
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-		struct snd_soc_dai *dai)
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-{
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-	snd_soc_dai_set_dma_data(dai, substream, NULL);
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-}
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-
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 static int dw_i2s_prepare(struct snd_pcm_substream *substream,
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 			  struct snd_soc_dai *dai)
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 {
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@@ -382,8 +352,6 @@
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 }
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 static const struct snd_soc_dai_ops dw_i2s_dai_ops = {
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-	.startup	= dw_i2s_startup,
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-	.shutdown	= dw_i2s_shutdown,
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 	.hw_params	= dw_i2s_hw_params,
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 	.prepare	= dw_i2s_prepare,
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 	.trigger	= dw_i2s_trigger,
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@@ -624,6 +592,14 @@
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 }
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+static int dw_i2s_dai_probe(struct snd_soc_dai *dai)
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+{
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+	struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
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+
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+	snd_soc_dai_init_dma_data(dai, &dev->play_dma_data, &dev->capture_dma_data);
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+	return 0;
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+}
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+
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 static int dw_i2s_probe(struct platform_device *pdev)
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 {
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 	const struct i2s_platform_data *pdata = pdev->dev.platform_data;
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@@ -642,6 +618,7 @@
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 		return -ENOMEM;
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 	dw_i2s_dai->ops = &dw_i2s_dai_ops;
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+	dw_i2s_dai->probe = dw_i2s_dai_probe;
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 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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 	dev->i2s_base = devm_ioremap_resource(&pdev->dev, res);