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ASoC: rockchip: i2s: switch BCLK to GPIO

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Merge series from Judy Hsiao <judyhsiao@chromium.org>:

The patches series is to fix the unexpected large DC output
voltage of Max98357a that burns the speakers on the rockchip
platform when BCLK and SD_MODE are ON but LRCLK is OFF.
This commit is contained in:
Mark Brown 2022-06-22 17:40:22 +01:00
commit 55e77abab2
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 42 additions and 45 deletions
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7
Documentation/devicetree/bindings/sound/rockchip-i2s.yaml
View File

@ -61,6 +61,13 @@ properties:
- const: tx
- const: rx
pinctrl-names:
oneOf:
- const: default
- items:
- const: bclk_on
- const: bclk_off
power-domains:
maxItems: 1

80
sound/soc/rockchip/rockchip_i2s.c
View File

@ -65,8 +65,7 @@ static int i2s_pinctrl_select_bclk_on(struct rk_i2s_dev *i2s)
int ret = 0;
if (!IS_ERR(i2s->pinctrl) && !IS_ERR_OR_NULL(i2s->bclk_on))
ret = pinctrl_select_state(i2s->pinctrl,
i2s->bclk_on);
ret = pinctrl_select_state(i2s->pinctrl, i2s->bclk_on);
if (ret)
dev_err(i2s->dev, "bclk enable failed %d\n", ret);
@ -80,8 +79,7 @@ static int i2s_pinctrl_select_bclk_off(struct rk_i2s_dev *i2s)
int ret = 0;
if (!IS_ERR(i2s->pinctrl) && !IS_ERR_OR_NULL(i2s->bclk_off))
ret = pinctrl_select_state(i2s->pinctrl,
i2s->bclk_off);
ret = pinctrl_select_state(i2s->pinctrl, i2s->bclk_off);
if (ret)
dev_err(i2s->dev, "bclk disable failed %d\n", ret);
@ -134,41 +132,37 @@ static int rockchip_snd_txctrl(struct rk_i2s_dev *i2s, int on)
spin_lock(&i2s->lock);
if (on) {
ret = regmap_update_bits(i2s->regmap, I2S_DMACR,
I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_ENABLE);
I2S_DMACR_TDE_ENABLE,
I2S_DMACR_TDE_ENABLE);
if (ret < 0)
goto end;
ret = regmap_update_bits(i2s->regmap, I2S_XFER,
I2S_XFER_TXS_START | I2S_XFER_RXS_START,
I2S_XFER_TXS_START | I2S_XFER_RXS_START);
I2S_XFER_TXS_START | I2S_XFER_RXS_START,
I2S_XFER_TXS_START | I2S_XFER_RXS_START);
if (ret < 0)
goto end;
i2s->tx_start = true;
} else {
i2s->tx_start = false;
ret = regmap_update_bits(i2s->regmap, I2S_DMACR,
I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_DISABLE);
I2S_DMACR_TDE_ENABLE,
I2S_DMACR_TDE_DISABLE);
if (ret < 0)
goto end;
if (!i2s->rx_start) {
ret = regmap_update_bits(i2s->regmap, I2S_XFER,
I2S_XFER_TXS_START |
I2S_XFER_RXS_START,
I2S_XFER_TXS_STOP |
I2S_XFER_RXS_STOP);
I2S_XFER_TXS_START | I2S_XFER_RXS_START,
I2S_XFER_TXS_STOP | I2S_XFER_RXS_STOP);
if (ret < 0)
goto end;
udelay(150);
ret = regmap_update_bits(i2s->regmap, I2S_CLR,
I2S_CLR_TXC | I2S_CLR_RXC,
I2S_CLR_TXC | I2S_CLR_RXC);
I2S_CLR_TXC | I2S_CLR_RXC,
I2S_CLR_TXC | I2S_CLR_RXC);
if (ret < 0)
goto end;
regmap_read(i2s->regmap, I2S_CLR, &val);
/* Should wait for clear operation to finish */
@ -199,37 +193,36 @@ static int rockchip_snd_rxctrl(struct rk_i2s_dev *i2s, int on)
spin_lock(&i2s->lock);
if (on) {
ret = regmap_update_bits(i2s->regmap, I2S_DMACR,
I2S_DMACR_RDE_ENABLE, I2S_DMACR_RDE_ENABLE);
I2S_DMACR_RDE_ENABLE,
I2S_DMACR_RDE_ENABLE);
if (ret < 0)
goto end;
ret = regmap_update_bits(i2s->regmap, I2S_XFER,
I2S_XFER_TXS_START | I2S_XFER_RXS_START,
I2S_XFER_TXS_START | I2S_XFER_RXS_START);
I2S_XFER_TXS_START | I2S_XFER_RXS_START,
I2S_XFER_TXS_START | I2S_XFER_RXS_START);
if (ret < 0)
goto end;
i2s->rx_start = true;
} else {
i2s->rx_start = false;
ret = regmap_update_bits(i2s->regmap, I2S_DMACR,
I2S_DMACR_RDE_ENABLE, I2S_DMACR_RDE_DISABLE);
I2S_DMACR_RDE_ENABLE,
I2S_DMACR_RDE_DISABLE);
if (ret < 0)
goto end;
if (!i2s->tx_start) {
ret = regmap_update_bits(i2s->regmap, I2S_XFER,
I2S_XFER_TXS_START |
I2S_XFER_RXS_START,
I2S_XFER_TXS_STOP |
I2S_XFER_RXS_STOP);
I2S_XFER_TXS_START | I2S_XFER_RXS_START,
I2S_XFER_TXS_STOP | I2S_XFER_RXS_STOP);
if (ret < 0)
goto end;
udelay(150);
ret = regmap_update_bits(i2s->regmap, I2S_CLR,
I2S_CLR_TXC | I2S_CLR_RXC,
I2S_CLR_TXC | I2S_CLR_RXC);
I2S_CLR_TXC | I2S_CLR_RXC,
I2S_CLR_TXC | I2S_CLR_RXC);
if (ret < 0)
goto end;
regmap_read(i2s->regmap, I2S_CLR, &val);
@ -490,7 +483,6 @@ static int rockchip_i2s_trigger(struct snd_pcm_substream *substream,
ret = rockchip_snd_rxctrl(i2s, 1);
else
ret = rockchip_snd_txctrl(i2s, 1);
/* Do not turn on bclk if lrclk open fails. */
if (ret < 0)
return ret;
i2s_pinctrl_select_bclk_on(i2s);
@ -808,24 +800,22 @@ static int rockchip_i2s_probe(struct platform_device *pdev)
i2s->bclk_ratio = 64;
i2s->pinctrl = devm_pinctrl_get(&pdev->dev);
if (IS_ERR(i2s->pinctrl)) {
dev_err(&pdev->dev, "failed to find i2s pinctrl\n");
} else {
if (!IS_ERR(i2s->pinctrl)) {
i2s->bclk_on = pinctrl_lookup_state(i2s->pinctrl, "bclk_on");
if (IS_ERR_OR_NULL(i2s->bclk_on))
dev_err(&pdev->dev, "failed to find i2s default state\n");
else
dev_dbg(&pdev->dev, "find i2s bclk state\n");
i2s->bclk_off = pinctrl_lookup_state(i2s->pinctrl, "bclk_off");
if (IS_ERR_OR_NULL(i2s->bclk_off))
dev_err(&pdev->dev, "failed to find i2s gpio state\n");
else
dev_dbg(&pdev->dev, "find i2s bclk_off state\n");
i2s_pinctrl_select_bclk_off(i2s);
if (!IS_ERR_OR_NULL(i2s->bclk_on)) {
i2s->bclk_off = pinctrl_lookup_state(i2s->pinctrl, "bclk_off");
if (IS_ERR_OR_NULL(i2s->bclk_off)) {
dev_err(&pdev->dev, "failed to find i2s bclk_off\n");
goto err_clk;
}
}
} else {
dev_err(&pdev->dev, "failed to find i2s pinctrl\n");
}
i2s_pinctrl_select_bclk_off(i2s);
i2s->playback_dma_data.addr = res->start + I2S_TXDR;
i2s->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
i2s->playback_dma_data.maxburst = 4;