linux-kernel - [PATCH v6 1/5] ASoC: sun4i-codec: Add DMA Max Burst field

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Message-ID: <20241123123900.2656837-2-csokas.bence@prolan.hu>
Date: Sat, 23 Nov 2024 13:38:58 +0100
From: Csókás, Bence <csokas.bence@...lan.hu>
To: <linux-sound@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-sunxi@...ts.linux.dev>, <linux-kernel@...r.kernel.org>
CC: Mesih Kilinc <mesihkilinc@...il.com>,
	Csókás, Bence <csokas.bence@...lan.hu>, "Liam
 Girdwood" <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, "Jaroslav
 Kysela" <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>, Chen-Yu Tsai
	<wens@...e.org>, Jernej Skrabec <jernej.skrabec@...il.com>, Samuel Holland
	<samuel@...lland.org>
Subject: [PATCH v6 1/5] ASoC: sun4i-codec: Add DMA Max Burst field

From: Mesih Kilinc <mesihkilinc@...il.com>

Allwinner suniv F1C100s has similar DMA engine to sun4i but it has
smaller max burst size compared to sun4i. Add a quirk field to
differantitate between them.

Signed-off-by: Mesih Kilinc <mesihkilinc@...il.com>
[ csokas.bence: Rebased on current master ]
Signed-off-by: Csókás, Bence <csokas.bence@...lan.hu>
---
 sound/soc/sunxi/sun4i-codec.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/sound/soc/sunxi/sun4i-codec.c b/sound/soc/sunxi/sun4i-codec.c
index 933a0913237c..275f77f60830 100644
--- a/sound/soc/sunxi/sun4i-codec.c
+++ b/sound/soc/sunxi/sun4i-codec.c
@@ -265,6 +265,8 @@
 
 /* TODO H3 DAP (Digital Audio Processing) bits */
 
+#define SUN4I_DMA_MAX_BURST			(8)
+
 struct sun4i_codec {
 	struct device	*dev;
 	struct regmap	*regmap;
@@ -1761,6 +1763,7 @@ struct sun4i_codec_quirks {
 	unsigned int reg_adc_rxdata;	/* RX FIFO offset for DMA config */
 	bool has_reset;
 	bool playback_only;
+	u32 dma_max_burst;
 };
 
 static const struct sun4i_codec_quirks sun4i_codec_quirks = {
@@ -1771,6 +1774,7 @@ static const struct sun4i_codec_quirks sun4i_codec_quirks = {
 	.reg_dac_fifoc	= REG_FIELD(SUN4I_CODEC_DAC_FIFOC, 0, 31),
 	.reg_dac_txdata	= SUN4I_CODEC_DAC_TXDATA,
 	.reg_adc_rxdata	= SUN4I_CODEC_ADC_RXDATA,
+	.dma_max_burst	= SUN4I_DMA_MAX_BURST,
 };
 
 static const struct sun4i_codec_quirks sun6i_a31_codec_quirks = {
@@ -1782,6 +1786,7 @@ static const struct sun4i_codec_quirks sun6i_a31_codec_quirks = {
 	.reg_dac_txdata	= SUN4I_CODEC_DAC_TXDATA,
 	.reg_adc_rxdata	= SUN6I_CODEC_ADC_RXDATA,
 	.has_reset	= true,
+	.dma_max_burst	= SUN4I_DMA_MAX_BURST,
 };
 
 static const struct sun4i_codec_quirks sun7i_codec_quirks = {
@@ -1792,6 +1797,7 @@ static const struct sun4i_codec_quirks sun7i_codec_quirks = {
 	.reg_dac_fifoc	= REG_FIELD(SUN4I_CODEC_DAC_FIFOC, 0, 31),
 	.reg_dac_txdata	= SUN4I_CODEC_DAC_TXDATA,
 	.reg_adc_rxdata	= SUN4I_CODEC_ADC_RXDATA,
+	.dma_max_burst	= SUN4I_DMA_MAX_BURST,
 };
 
 static const struct sun4i_codec_quirks sun8i_a23_codec_quirks = {
@@ -1803,6 +1809,7 @@ static const struct sun4i_codec_quirks sun8i_a23_codec_quirks = {
 	.reg_dac_txdata	= SUN4I_CODEC_DAC_TXDATA,
 	.reg_adc_rxdata	= SUN6I_CODEC_ADC_RXDATA,
 	.has_reset	= true,
+	.dma_max_burst	= SUN4I_DMA_MAX_BURST,
 };
 
 static const struct sun4i_codec_quirks sun8i_h3_codec_quirks = {
@@ -1819,6 +1826,7 @@ static const struct sun4i_codec_quirks sun8i_h3_codec_quirks = {
 	.reg_dac_txdata	= SUN8I_H3_CODEC_DAC_TXDATA,
 	.reg_adc_rxdata	= SUN6I_CODEC_ADC_RXDATA,
 	.has_reset	= true,
+	.dma_max_burst	= SUN4I_DMA_MAX_BURST,
 };
 
 static const struct sun4i_codec_quirks sun8i_v3s_codec_quirks = {
@@ -1834,6 +1842,7 @@ static const struct sun4i_codec_quirks sun8i_v3s_codec_quirks = {
 	.reg_dac_txdata	= SUN8I_H3_CODEC_DAC_TXDATA,
 	.reg_adc_rxdata	= SUN6I_CODEC_ADC_RXDATA,
 	.has_reset	= true,
+	.dma_max_burst	= SUN4I_DMA_MAX_BURST,
 };
 
 static const struct sun4i_codec_quirks sun50i_h616_codec_quirks = {
@@ -1843,6 +1852,7 @@ static const struct sun4i_codec_quirks sun50i_h616_codec_quirks = {
 	.reg_dac_fifoc	= REG_FIELD(SUN50I_H616_CODEC_DAC_FIFOC, 0, 31),
 	.reg_dac_txdata	= SUN8I_H3_CODEC_DAC_TXDATA,
 	.has_reset	= true,
+	.dma_max_burst	= SUN4I_DMA_MAX_BURST,
 };
 
 static const struct of_device_id sun4i_codec_of_match[] = {
@@ -1979,14 +1989,14 @@ static int sun4i_codec_probe(struct platform_device *pdev)
 
 	/* DMA configuration for TX FIFO */
 	scodec->playback_dma_data.addr = res->start + quirks->reg_dac_txdata;
-	scodec->playback_dma_data.maxburst = 8;
+	scodec->playback_dma_data.maxburst = quirks->dma_max_burst;
 	scodec->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
 
 	if (!quirks->playback_only) {
 		/* DMA configuration for RX FIFO */
 		scodec->capture_dma_data.addr = res->start +
 						quirks->reg_adc_rxdata;
-		scodec->capture_dma_data.maxburst = 8;
+		scodec->capture_dma_data.maxburst = quirks->dma_max_burst;
 		scodec->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
 	}
 
-- 
2.34.1