Re: [PATCH 01/11] ASoC: dai_dma: remove slave_id field

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On 11/15/21 9:53 AM, Arnd Bergmann wrote:
From: Arnd Bergmann <arnd@xxxxxxxx>

This field is never set, and serves no purpose, so remove it.

I agree that we should remove it. Its been legacy support code for a while, but the description that there is no user is not right.

The tegra20_spdif driver obviously uses it and that user is removed in this patch. I think it makes sense to split that out into a separate patch with a description why the driver will still work even with slave_id removed. Maybe the best is to remove the whole tegra20_spdif driver.

diff --git a/sound/soc/tegra/tegra20_spdif.c b/sound/soc/tegra/tegra20_spdif.c
index 9fdc82d58db3..1c3385da6f82 100644
--- a/sound/soc/tegra/tegra20_spdif.c
+++ b/sound/soc/tegra/tegra20_spdif.c
@@ -284,7 +284,6 @@ static int tegra20_spdif_platform_probe(struct platform_device *pdev)
  	spdif->playback_dma_data.addr = mem->start + TEGRA20_SPDIF_DATA_OUT;
  	spdif->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
  	spdif->playback_dma_data.maxburst = 4;
-	spdif->playback_dma_data.slave_id = dmareq->start;
dmareq is now unused and should be removed as well.
  	pm_runtime_enable(&pdev->dev);





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