[PATCH] ASoC: rockchip-i2s: Undo BCLK pinctrl changes
Alexandru Elisei
alexandru.elisei at arm.com
Wed Jul 13 16:25:27 CEST 2022
Hi,
On Wed, Jul 13, 2022 at 02:04:51PM +0100, Mark Brown wrote:
> The version of the BCLK pinctrl management changes that made it into
> v5.19 has caused problems on some systems due to overly strict DT
> requirements but attempts to fix it have caused further breakage on
> other platforms. Just drop the changes for this release, we already
> have a better version queued for -next.
For what it's worth, I am now able to boot my rockpro64-v2 with this patch.
Thanks,
Alex
>
> Fixes: 26b9f2fa7b1c ("ASoC: rockchip: i2s: Fix NULL pointer dereference when pinctrl is not found")
> Fixes: a5450aba737d ("ASoC: rockchip: i2s: switch BCLK to GPIO")
> Signed-off-by: Mark Brown <broonie at kernel.org>
> ---
> sound/soc/rockchip/rockchip_i2s.c | 163 ++++++------------------------
> 1 file changed, 31 insertions(+), 132 deletions(-)
>
> diff --git a/sound/soc/rockchip/rockchip_i2s.c b/sound/soc/rockchip/rockchip_i2s.c
> index c9fedf6eb2e6..4ce5d2579387 100644
> --- a/sound/soc/rockchip/rockchip_i2s.c
> +++ b/sound/soc/rockchip/rockchip_i2s.c
> @@ -13,7 +13,6 @@
> #include <linux/of_gpio.h>
> #include <linux/of_device.h>
> #include <linux/clk.h>
> -#include <linux/pinctrl/consumer.h>
> #include <linux/pm_runtime.h>
> #include <linux/regmap.h>
> #include <linux/spinlock.h>
> @@ -55,40 +54,8 @@ struct rk_i2s_dev {
> const struct rk_i2s_pins *pins;
> unsigned int bclk_ratio;
> spinlock_t lock; /* tx/rx lock */
> - struct pinctrl *pinctrl;
> - struct pinctrl_state *bclk_on;
> - struct pinctrl_state *bclk_off;
> };
>
> -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);
> -
> - if (ret)
> - dev_err(i2s->dev, "bclk enable failed %d\n", ret);
> -
> - return ret;
> -}
> -
> -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);
> -
> - if (ret)
> - dev_err(i2s->dev, "bclk disable failed %d\n", ret);
> -
> - return ret;
> -}
> -
> static int i2s_runtime_suspend(struct device *dev)
> {
> struct rk_i2s_dev *i2s = dev_get_drvdata(dev);
> @@ -125,49 +92,38 @@ static inline struct rk_i2s_dev *to_info(struct snd_soc_dai *dai)
> return snd_soc_dai_get_drvdata(dai);
> }
>
> -static int rockchip_snd_txctrl(struct rk_i2s_dev *i2s, int on)
> +static void rockchip_snd_txctrl(struct rk_i2s_dev *i2s, int on)
> {
> unsigned int val = 0;
> int retry = 10;
> - int ret = 0;
>
> spin_lock(&i2s->lock);
> if (on) {
> - ret = regmap_update_bits(i2s->regmap, I2S_DMACR,
> - I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_ENABLE);
> - if (ret < 0)
> - goto end;
> + regmap_update_bits(i2s->regmap, I2S_DMACR,
> + I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_ENABLE);
>
> - ret = regmap_update_bits(i2s->regmap, I2S_XFER,
> - I2S_XFER_TXS_START | I2S_XFER_RXS_START,
> - I2S_XFER_TXS_START | I2S_XFER_RXS_START);
> - if (ret < 0)
> - goto end;
> + regmap_update_bits(i2s->regmap, I2S_XFER,
> + I2S_XFER_TXS_START | I2S_XFER_RXS_START,
> + I2S_XFER_TXS_START | I2S_XFER_RXS_START);
>
> 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);
> - if (ret < 0)
> - goto end;
> + regmap_update_bits(i2s->regmap, I2S_DMACR,
> + I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_DISABLE);
>
> 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);
> - if (ret < 0)
> - goto end;
> + regmap_update_bits(i2s->regmap, I2S_XFER,
> + I2S_XFER_TXS_START |
> + I2S_XFER_RXS_START,
> + I2S_XFER_TXS_STOP |
> + I2S_XFER_RXS_STOP);
>
> udelay(150);
> - ret = regmap_update_bits(i2s->regmap, I2S_CLR,
> - I2S_CLR_TXC | I2S_CLR_RXC,
> - I2S_CLR_TXC | I2S_CLR_RXC);
> - if (ret < 0)
> - goto end;
> + regmap_update_bits(i2s->regmap, I2S_CLR,
> + I2S_CLR_TXC | I2S_CLR_RXC,
> + I2S_CLR_TXC | I2S_CLR_RXC);
>
> regmap_read(i2s->regmap, I2S_CLR, &val);
>
> @@ -182,57 +138,44 @@ static int rockchip_snd_txctrl(struct rk_i2s_dev *i2s, int on)
> }
> }
> }
> -end:
> spin_unlock(&i2s->lock);
> - if (ret < 0)
> - dev_err(i2s->dev, "lrclk update failed\n");
> -
> - return ret;
> }
>
> -static int rockchip_snd_rxctrl(struct rk_i2s_dev *i2s, int on)
> +static void rockchip_snd_rxctrl(struct rk_i2s_dev *i2s, int on)
> {
> unsigned int val = 0;
> int retry = 10;
> - int ret = 0;
>
> spin_lock(&i2s->lock);
> if (on) {
> - ret = regmap_update_bits(i2s->regmap, I2S_DMACR,
> + regmap_update_bits(i2s->regmap, I2S_DMACR,
> I2S_DMACR_RDE_ENABLE, I2S_DMACR_RDE_ENABLE);
> - if (ret < 0)
> - goto end;
>
> - ret = regmap_update_bits(i2s->regmap, I2S_XFER,
> + regmap_update_bits(i2s->regmap, I2S_XFER,
> 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,
> + regmap_update_bits(i2s->regmap, I2S_DMACR,
> 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,
> + regmap_update_bits(i2s->regmap, I2S_XFER,
> 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,
> + regmap_update_bits(i2s->regmap, I2S_CLR,
> 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 */
> while (val) {
> regmap_read(i2s->regmap, I2S_CLR, &val);
> @@ -244,12 +187,7 @@ static int rockchip_snd_rxctrl(struct rk_i2s_dev *i2s, int on)
> }
> }
> }
> -end:
> spin_unlock(&i2s->lock);
> - if (ret < 0)
> - dev_err(i2s->dev, "lrclk update failed\n");
> -
> - return ret;
> }
>
> static int rockchip_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
> @@ -487,26 +425,17 @@ static int rockchip_i2s_trigger(struct snd_pcm_substream *substream,
> case SNDRV_PCM_TRIGGER_RESUME:
> case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
> if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
> - ret = rockchip_snd_rxctrl(i2s, 1);
> + 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);
> + rockchip_snd_txctrl(i2s, 1);
> break;
> case SNDRV_PCM_TRIGGER_SUSPEND:
> case SNDRV_PCM_TRIGGER_STOP:
> case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
> - if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
> - if (!i2s->tx_start)
> - i2s_pinctrl_select_bclk_off(i2s);
> - ret = rockchip_snd_rxctrl(i2s, 0);
> - } else {
> - if (!i2s->rx_start)
> - i2s_pinctrl_select_bclk_off(i2s);
> - ret = rockchip_snd_txctrl(i2s, 0);
> - }
> + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
> + rockchip_snd_rxctrl(i2s, 0);
> + else
> + rockchip_snd_txctrl(i2s, 0);
> break;
> default:
> ret = -EINVAL;
> @@ -807,36 +736,6 @@ 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");
> - ret = PTR_ERR(i2s->pinctrl);
> - goto err_clk;
> - }
> -
> - 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);
> -
> - 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;
> -
> - i2s->capture_dma_data.addr = res->start + I2S_RXDR;
> - i2s->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
> - i2s->capture_dma_data.maxburst = 4;
>
> dev_set_drvdata(&pdev->dev, i2s);
>
> --
> 2.30.2
>
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