linux-kernel - [PATCH 02/11] ASoC: jz4740-i2s: Refactor DMA channel setup

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Date:   Wed,  6 Jul 2022 22:13:21 +0100
From:   Aidan MacDonald <aidanmacdonald.0x0@...il.com>
To:     paul@...pouillou.net, lgirdwood@...il.com, broonie@...nel.org,
        perex@...ex.cz, tiwai@...e.com
Cc:     linux-mips@...r.kernel.org, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 02/11] ASoC: jz4740-i2s: Refactor DMA channel setup

It's simpler to set up the playback and capture DMA settings
at driver probe time instead of during DAI probing.

Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@...il.com>
---
 sound/soc/jz4740/jz4740-i2s.c | 23 +++++------------------
 1 file changed, 5 insertions(+), 18 deletions(-)

diff --git a/sound/soc/jz4740/jz4740-i2s.c b/sound/soc/jz4740/jz4740-i2s.c
index 298ff0a83931..ecd8df70d39c 100644
--- a/sound/soc/jz4740/jz4740-i2s.c
+++ b/sound/soc/jz4740/jz4740-i2s.c
@@ -95,7 +95,6 @@ struct i2s_soc_info {
 struct jz4740_i2s {
 	struct resource *mem;
 	void __iomem *base;
-	dma_addr_t phys_base;
 
 	struct clk *clk_aic;
 	struct clk *clk_i2s;
@@ -370,21 +369,6 @@ static int jz4740_i2s_resume(struct snd_soc_component *component)
 	return 0;
 }
 
-static void jz4740_i2s_init_pcm_config(struct jz4740_i2s *i2s)
-{
-	struct snd_dmaengine_dai_dma_data *dma_data;
-
-	/* Playback */
-	dma_data = &i2s->playback_dma_data;
-	dma_data->maxburst = 16;
-	dma_data->addr = i2s->phys_base + JZ_REG_AIC_FIFO;
-
-	/* Capture */
-	dma_data = &i2s->capture_dma_data;
-	dma_data->maxburst = 16;
-	dma_data->addr = i2s->phys_base + JZ_REG_AIC_FIFO;
-}
-
 static int jz4740_i2s_dai_probe(struct snd_soc_dai *dai)
 {
 	struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai);
@@ -395,7 +379,6 @@ static int jz4740_i2s_dai_probe(struct snd_soc_dai *dai)
 	if (ret)
 		return ret;
 
-	jz4740_i2s_init_pcm_config(i2s);
 	snd_soc_dai_init_dma_data(dai, &i2s->playback_dma_data,
 		&i2s->capture_dma_data);
 
@@ -529,7 +512,11 @@ static int jz4740_i2s_dev_probe(struct platform_device *pdev)
 	if (IS_ERR(i2s->base))
 		return PTR_ERR(i2s->base);
 
-	i2s->phys_base = mem->start;
+	i2s->playback_dma_data.maxburst = 16;
+	i2s->playback_dma_data.addr = mem->start + JZ_REG_AIC_FIFO;
+
+	i2s->capture_dma_data.maxburst = 16;
+	i2s->capture_dma_data.addr = mem->start + JZ_REG_AIC_FIFO;
 
 	i2s->clk_aic = devm_clk_get(dev, "aic");
 	if (IS_ERR(i2s->clk_aic))
-- 
2.35.1