[PATCH v2 0/3] ASoC: rockchip: i2s: switch BCLK to GPIO
The patches series is to fix the unexpected large DC output voltage of Max98357a to burn the speakers on rockchip platform when BCLK and SD_MODE are ON but LRCLK is OFF.
Changes Since V2: -- Add documents of i2s pinctrl-names. -- Fix dtsi syntax error. -- Include the dtsi change and the driver change in the same series. -- Ensure that driver gets both bclk_on and bclk_off states before using them.
Judy Hsiao (3): ASoC: rockchip: i2s: switch BCLK to GPIO arm64: dts: rk3399: i2s: switch BCLK to GPIO ASoC: dt-bindings: rockchip: Document pinctrl-names for i2s
.../bindings/sound/rockchip-i2s.yaml | 7 + .../boot/dts/rockchip/rk3399-gru-scarlet.dtsi | 10 ++ arch/arm64/boot/dts/rockchip/rk3399.dtsi | 25 +++- sound/soc/rockchip/rockchip_i2s.c | 134 ++++++++++++++---- 4 files changed, 149 insertions(+), 27 deletions(-)
We discoverd that the state of BCLK on, LRCLK off and SD_MODE on may cause the speaker melting issue. Removing LRCLK while BCLK is present can cause unexpected output behavior including a large DC output voltage as described in the Max98357a datasheet.
In order to: 1. prevent BCLK from turning on by other component. 2. keep BCLK and LRCLK being present at the same time
This patch switches BCLK to GPIO func before LRCLK output, and configures BCLK func back during LRCLK is output.
Without this fix, BCLK is turned on 11 ms earlier than LRCK by the da7219. With this fix, BCLK is turned on only 0.4 ms earlier than LRCK by the rockchip codec.
Signed-off-by: Judy Hsiao judyhsiao@chromium.org --- sound/soc/rockchip/rockchip_i2s.c | 134 ++++++++++++++++++++++++------ 1 file changed, 108 insertions(+), 26 deletions(-)
diff --git a/sound/soc/rockchip/rockchip_i2s.c b/sound/soc/rockchip/rockchip_i2s.c index 47a3971a9ce1..574d3d0900c4 100644 --- a/sound/soc/rockchip/rockchip_i2s.c +++ b/sound/soc/rockchip/rockchip_i2s.c @@ -54,8 +54,40 @@ 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); @@ -92,39 +124,46 @@ static inline struct rk_i2s_dev *to_info(struct snd_soc_dai *dai) return snd_soc_dai_get_drvdata(dai); }
-static void rockchip_snd_txctrl(struct rk_i2s_dev *i2s, int on) +static int 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) { - regmap_update_bits(i2s->regmap, I2S_DMACR, + ret = regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_ENABLE); - - regmap_update_bits(i2s->regmap, I2S_XFER, + 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); - + if (ret < 0) + goto end; i2s->tx_start = true; } else { i2s->tx_start = false;
- regmap_update_bits(i2s->regmap, I2S_DMACR, + ret = regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_DISABLE); + if (ret < 0) + goto end;
if (!i2s->rx_start) { - regmap_update_bits(i2s->regmap, I2S_XFER, + 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; udelay(150); - regmap_update_bits(i2s->regmap, I2S_CLR, + 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_read(i2s->regmap, I2S_CLR, &val);
/* Should wait for clear operation to finish */ @@ -138,42 +177,55 @@ static void 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 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) { - regmap_update_bits(i2s->regmap, I2S_DMACR, + ret = regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_RDE_ENABLE, I2S_DMACR_RDE_ENABLE); + if (ret < 0) + goto end;
- regmap_update_bits(i2s->regmap, I2S_XFER, + 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; i2s->rx_start = true; } else { i2s->rx_start = false;
- regmap_update_bits(i2s->regmap, I2S_DMACR, + ret = regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_RDE_ENABLE, I2S_DMACR_RDE_DISABLE); + if (ret < 0) + goto end;
if (!i2s->tx_start) { - regmap_update_bits(i2s->regmap, I2S_XFER, + ret = regmap_update_bits(i2s->regmap, I2S_XFER, I2S_XFER_TXS_START | - I2S_XFER_RXS_START, + I2S_XFER_RXS_START, I2S_XFER_TXS_STOP | I2S_XFER_RXS_STOP); - + if (ret < 0) + goto end; udelay(150); - regmap_update_bits(i2s->regmap, I2S_CLR, + 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_read(i2s->regmap, I2S_CLR, &val);
/* Should wait for clear operation to finish */ @@ -187,7 +239,12 @@ static void 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, @@ -425,17 +482,25 @@ 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) - rockchip_snd_rxctrl(i2s, 1); + ret = rockchip_snd_rxctrl(i2s, 1); else - rockchip_snd_txctrl(i2s, 1); + ret = rockchip_snd_txctrl(i2s, 1); + if (ret < 0) + return ret; + i2s_pinctrl_select_bclk_on(i2s); break; case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_PAUSE_PUSH: - if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) - rockchip_snd_rxctrl(i2s, 0); - else - rockchip_snd_txctrl(i2s, 0); + 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); + } break; default: ret = -EINVAL; @@ -736,6 +801,23 @@ 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"); + + i2s->bclk_on = pinctrl_lookup_state(i2s->pinctrl, + "bclk_on"); + if (!IS_ERR_OR_NULL(i2s->bclk_on)) { + dev_info(&pdev->dev, "switch bclk to GPIO func\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 bclk_off\n"); + goto err_clk; + } + } + + i2s_pinctrl_select_bclk_off(i2s);
dev_set_drvdata(&pdev->dev, i2s);
Hi Judy,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on rockchip/for-next] [also build test ERROR on broonie-sound/for-next robh/for-next linus/master v5.19-rc2 next-20220616] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch]
url: https://github.com/intel-lab-lkp/linux/commits/Judy-Hsiao/ASoC-rockchip-i2s-... base: https://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip.git for-next config: arc-randconfig-r043-20220616 (https://download.01.org/0day-ci/archive/20220617/202206170216.M52eiJwN-lkp@i...) compiler: arc-elf-gcc (GCC) 11.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/intel-lab-lkp/linux/commit/322064314e50b113217aa4c7412e24... git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Judy-Hsiao/ASoC-rockchip-i2s-switch-BCLK-to-GPIO/20220617-000041 git checkout 322064314e50b113217aa4c7412e2431defea08f # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash sound/soc/rockchip/
If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot lkp@intel.com
All errors (new ones prefixed by >>):
sound/soc/rockchip/rockchip_i2s.c: In function 'rockchip_snd_rxctrl': sound/soc/rockchip/rockchip_i2s.c:247:16: error: 'return' with a value, in function returning void [-Werror=return-type] 247 | return ret; | ^~~ sound/soc/rockchip/rockchip_i2s.c:188:13: note: declared here 188 | static void rockchip_snd_rxctrl(struct rk_i2s_dev *i2s, int on) | ^~~~~~~~~~~~~~~~~~~ sound/soc/rockchip/rockchip_i2s.c: In function 'rockchip_i2s_trigger':
sound/soc/rockchip/rockchip_i2s.c:485:29: error: void value not ignored as it ought to be
485 | ret = rockchip_snd_rxctrl(i2s, 1); | ^ sound/soc/rockchip/rockchip_i2s.c:498:29: error: void value not ignored as it ought to be 498 | ret = rockchip_snd_rxctrl(i2s, 0); | ^ cc1: some warnings being treated as errors
vim +485 sound/soc/rockchip/rockchip_i2s.c
473 474 static int rockchip_i2s_trigger(struct snd_pcm_substream *substream, 475 int cmd, struct snd_soc_dai *dai) 476 { 477 struct rk_i2s_dev *i2s = to_info(dai); 478 int ret = 0; 479 480 switch (cmd) { 481 case SNDRV_PCM_TRIGGER_START: 482 case SNDRV_PCM_TRIGGER_RESUME: 483 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 484 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
485 ret = rockchip_snd_rxctrl(i2s, 1);
486 else 487 ret = rockchip_snd_txctrl(i2s, 1); 488 if (ret < 0) 489 return ret; 490 i2s_pinctrl_select_bclk_on(i2s); 491 break; 492 case SNDRV_PCM_TRIGGER_SUSPEND: 493 case SNDRV_PCM_TRIGGER_STOP: 494 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 495 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { 496 if (!i2s->tx_start) 497 i2s_pinctrl_select_bclk_off(i2s); 498 ret = rockchip_snd_rxctrl(i2s, 0); 499 } else { 500 if (!i2s->rx_start) 501 i2s_pinctrl_select_bclk_off(i2s); 502 ret = rockchip_snd_txctrl(i2s, 0); 503 } 504 break; 505 default: 506 ret = -EINVAL; 507 break; 508 } 509 510 return ret; 511 } 512
Hi,
On Thu, Jun 16, 2022 at 03:58:34PM +0000, Judy Hsiao wrote:
We discoverd that the state of BCLK on, LRCLK off and SD_MODE on may cause the speaker melting issue. Removing LRCLK while BCLK is present can cause unexpected output behavior including a large DC output voltage as described in the Max98357a datasheet.
In order to:
- prevent BCLK from turning on by other component.
- keep BCLK and LRCLK being present at the same time
This patch switches BCLK to GPIO func before LRCLK output, and configures BCLK func back during LRCLK is output.
Without this fix, BCLK is turned on 11 ms earlier than LRCK by the da7219. With this fix, BCLK is turned on only 0.4 ms earlier than LRCK by the rockchip codec.
Signed-off-by: Judy Hsiao judyhsiao@chromium.org
It feels like a lot of the noise in this patch is due to adding additional error handling, unrelated to the real change you're making. Maybe that deserves a separate patch?
sound/soc/rockchip/rockchip_i2s.c | 134 ++++++++++++++++++++++++------ 1 file changed, 108 insertions(+), 26 deletions(-)
diff --git a/sound/soc/rockchip/rockchip_i2s.c b/sound/soc/rockchip/rockchip_i2s.c index 47a3971a9ce1..574d3d0900c4 100644 --- a/sound/soc/rockchip/rockchip_i2s.c +++ b/sound/soc/rockchip/rockchip_i2s.c @@ -54,8 +54,40 @@ 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); @@ -92,39 +124,46 @@ static inline struct rk_i2s_dev *to_info(struct snd_soc_dai *dai) return snd_soc_dai_get_drvdata(dai); }
-static void rockchip_snd_txctrl(struct rk_i2s_dev *i2s, int on) +static int 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) {
regmap_update_bits(i2s->regmap, I2S_DMACR,
ret = regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_ENABLE);
I mentioned this off-list, but the 2nd-line indentation alignment *used* to be in a very particular style, and you've moved that around a lot. To match the previous style, it should be:
ret = regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_ENABLE);
(BTW, if you're using Gmail to view this, you're going to have no idea what I'm talking about, since it doesn't do whitespace or monospace font correctly...)
The same applies throughout; most of the 2nd-line, 3rd-line, ... indentation is a little weird.
regmap_update_bits(i2s->regmap, I2S_XFER,
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);
if (ret < 0)
i2s->tx_start = true; } else { i2s->tx_start = false;goto end;
regmap_update_bits(i2s->regmap, I2S_DMACR,
ret = regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_DISABLE);
if (ret < 0)
goto end;
if (!i2s->rx_start) {
regmap_update_bits(i2s->regmap, I2S_XFER,
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; udelay(150);
regmap_update_bits(i2s->regmap, I2S_CLR,
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_read(i2s->regmap, I2S_CLR, &val); /* Should wait for clear operation to finish */
@@ -138,42 +177,55 @@ static void 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 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) {
regmap_update_bits(i2s->regmap, I2S_DMACR,
ret = regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_RDE_ENABLE, I2S_DMACR_RDE_ENABLE);
if (ret < 0)
goto end;
regmap_update_bits(i2s->regmap, I2S_XFER,
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)
i2s->rx_start = true; } else { i2s->rx_start = false;goto end;
regmap_update_bits(i2s->regmap, I2S_DMACR,
ret = regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_RDE_ENABLE, I2S_DMACR_RDE_DISABLE);
if (ret < 0)
goto end;
if (!i2s->tx_start) {
regmap_update_bits(i2s->regmap, I2S_XFER,
ret = regmap_update_bits(i2s->regmap, I2S_XFER, I2S_XFER_TXS_START |
I2S_XFER_RXS_START,
I2S_XFER_RXS_START, I2S_XFER_TXS_STOP | I2S_XFER_RXS_STOP);
if (ret < 0)
goto end; udelay(150);
regmap_update_bits(i2s->regmap, I2S_CLR,
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_read(i2s->regmap, I2S_CLR, &val); /* Should wait for clear operation to finish */
@@ -187,7 +239,12 @@ static void 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, @@ -425,17 +482,25 @@ 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)
rockchip_snd_rxctrl(i2s, 1);
elseret = rockchip_snd_rxctrl(i2s, 1);
rockchip_snd_txctrl(i2s, 1);
ret = rockchip_snd_txctrl(i2s, 1);
if (ret < 0)
return ret;
break; case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_PAUSE_PUSH:i2s_pinctrl_select_bclk_on(i2s);
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
rockchip_snd_rxctrl(i2s, 0);
else
rockchip_snd_txctrl(i2s, 0);
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);
break; default: ret = -EINVAL;}
@@ -736,6 +801,23 @@ 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");
- i2s->bclk_on = pinctrl_lookup_state(i2s->pinctrl,
"bclk_on");
- if (!IS_ERR_OR_NULL(i2s->bclk_on)) {
dev_info(&pdev->dev, "switch bclk to GPIO func\n");
I don't think we need this printed at the KERN_INFO level. Either drop it, or maybe dev_dbg().
Brian
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;
}
}
i2s_pinctrl_select_bclk_off(i2s);
dev_set_drvdata(&pdev->dev, i2s);
-- 2.36.1.476.g0c4daa206d-goog
It feels like a lot of the noise in this patch is due to adding additional error handling, unrelated to the real change you're making. Maybe that deserves a separate patch?
The error handling is to detect the failure of switching LRCLK. If LRCLK is OFF, we don’t want the BCLK to be ON. So the error handling in the patch is relevant.
I mentioned this off-list, but the 2nd-line indentation alignment *used* to be in a very particular style, and you've moved that around a lot. To match the previous style, it should be:
ret = regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_ENABLE);
(BTW, if you're using Gmail to view this, you're going to have no idea what I'm talking about, since it doesn't do whitespace or monospace font correctly...)
The same applies throughout; most of the 2nd-line, 3rd-line, ... indentation is a little weird.
Yes, let me fix the indentation in V3, thanks!
We discoverd that the state of BCLK on, LRCLK off and SD_MODE on may cause the speaker melting issue. Removing LRCLK while BCLK is present can cause unexpected output behavior including a large DC output voltage as described in the Max98357a datasheet.
In order to: 1. prevent BCLK from turning on by other component. 2. keep BCLK and LRCLK being present at the same time
This patch adjusts the device tree to allow BCLK to switch to GPIO func before LRCLK output, and switch back during LRCLK is output.
Signed-off-by: Judy Hsiao judyhsiao@chromium.org --- .../boot/dts/rockchip/rk3399-gru-scarlet.dtsi | 10 ++++++++ arch/arm64/boot/dts/rockchip/rk3399.dtsi | 25 ++++++++++++++++++- 2 files changed, 34 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-gru-scarlet.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-gru-scarlet.dtsi index 913d845eb51a..df1647e9d487 100644 --- a/arch/arm64/boot/dts/rockchip/rk3399-gru-scarlet.dtsi +++ b/arch/arm64/boot/dts/rockchip/rk3399-gru-scarlet.dtsi @@ -766,6 +766,16 @@ &i2s0_8ch_bus { <4 RK_PA0 1 &pcfg_pull_none_6ma>; };
+&i2s0_8ch_bus_bclk_off { + rockchip,pins = + <3 RK_PD0 RK_FUNC_GPIO &pcfg_pull_none_6ma>, + <3 RK_PD1 1 &pcfg_pull_none_6ma>, + <3 RK_PD2 1 &pcfg_pull_none_6ma>, + <3 RK_PD3 1 &pcfg_pull_none_6ma>, + <3 RK_PD7 1 &pcfg_pull_none_6ma>, + <4 RK_PA0 1 &pcfg_pull_none_6ma>; +}; + /* there is no external pull up, so need to set this pin pull up */ &sdmmc_cd_pin { rockchip,pins = <1 RK_PB3 RK_FUNC_GPIO &pcfg_pull_up>; diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi index fbd0346624e6..3981dec6a5a5 100644 --- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi +++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi @@ -1662,9 +1662,10 @@ i2s0: i2s@ff880000 { dma-names = "tx", "rx"; clock-names = "i2s_clk", "i2s_hclk"; clocks = <&cru SCLK_I2S0_8CH>, <&cru HCLK_I2S0_8CH>; - pinctrl-names = "default"; + pinctrl-names = "bclk_on", "bclk_off"; pinctrl-0 = <&i2s0_8ch_bus>; power-domains = <&power RK3399_PD_SDIOAUDIO>; + pinctrl-1 = <&i2s0_8ch_bus_bclk_off>; #sound-dai-cells = <0>; status = "disabled"; }; @@ -2407,6 +2408,19 @@ i2s0_8ch_bus: i2s0-8ch-bus { <3 RK_PD7 1 &pcfg_pull_none>, <4 RK_PA0 1 &pcfg_pull_none>; }; + + i2s0_8ch_bus_bclk_off: i2s0-8ch-bus-bclk-off { + rockchip,pins = + <3 RK_PD0 RK_FUNC_GPIO &pcfg_pull_none>, + <3 RK_PD1 1 &pcfg_pull_none>, + <3 RK_PD2 1 &pcfg_pull_none>, + <3 RK_PD3 1 &pcfg_pull_none>, + <3 RK_PD4 1 &pcfg_pull_none>, + <3 RK_PD5 1 &pcfg_pull_none>, + <3 RK_PD6 1 &pcfg_pull_none>, + <3 RK_PD7 1 &pcfg_pull_none>, + <4 RK_PA0 1 &pcfg_pull_none>; + }; };
i2s1 { @@ -2418,6 +2432,15 @@ i2s1_2ch_bus: i2s1-2ch-bus { <4 RK_PA6 1 &pcfg_pull_none>, <4 RK_PA7 1 &pcfg_pull_none>; }; + + i2s1_2ch_bus_bclk_off: i2s1-2ch-bus-bclk-off { + rockchip,pins = + <4 RK_PA3 RK_FUNC_GPIO &pcfg_pull_none>, + <4 RK_PA4 1 &pcfg_pull_none>, + <4 RK_PA5 1 &pcfg_pull_none>, + <4 RK_PA6 1 &pcfg_pull_none>, + <4 RK_PA7 1 &pcfg_pull_none>; + }; };
sdio0 {
Hi,
On Thu, Jun 16, 2022 at 03:58:35PM +0000, Judy Hsiao wrote:
We discoverd that the state of BCLK on, LRCLK off and SD_MODE on may cause the speaker melting issue. Removing LRCLK while BCLK is present can cause unexpected output behavior including a large DC output voltage as described in the Max98357a datasheet.
In order to:
- prevent BCLK from turning on by other component.
- keep BCLK and LRCLK being present at the same time
This patch adjusts the device tree to allow BCLK to switch to GPIO func before LRCLK output, and switch back during LRCLK is output.
Signed-off-by: Judy Hsiao judyhsiao@chromium.org
--- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi +++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi @@ -1662,9 +1662,10 @@ i2s0: i2s@ff880000 { dma-names = "tx", "rx"; clock-names = "i2s_clk", "i2s_hclk"; clocks = <&cru SCLK_I2S0_8CH>, <&cru HCLK_I2S0_8CH>;
pinctrl-names = "default";
pinctrl-0 = <&i2s0_8ch_bus>; power-domains = <&power RK3399_PD_SDIOAUDIO>;pinctrl-names = "bclk_on", "bclk_off";
pinctrl-1 = <&i2s0_8ch_bus_bclk_off>;
It seems like 'pinctrl-1' may make sense after pinctrl-0, not here. Perhaps you're interacting with my RFC PATCH that removes this 'power-domains' property?
https://lore.kernel.org/linux-rockchip/20220613183556.RFC.1.I9ca71105e505f02...
But that most likely isn't landing upstream as-is.
Otherwise, this patch looks good to me:
Reviewed-by: Brian Norris briannorris@chromium.org
#sound-dai-cells = <0>; status = "disabled";
};
This patch documents pinctrl-names for i2s.
Signed-off-by: Judy Hsiao judyhsiao@chromium.org --- Documentation/devicetree/bindings/sound/rockchip-i2s.yaml | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/rockchip-i2s.yaml b/Documentation/devicetree/bindings/sound/rockchip-i2s.yaml index 5ea16b8ef93f..af1069278623 100644 --- a/Documentation/devicetree/bindings/sound/rockchip-i2s.yaml +++ b/Documentation/devicetree/bindings/sound/rockchip-i2s.yaml @@ -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
On Thu, Jun 16, 2022 at 03:58:36PM +0000, Judy Hsiao wrote:
This patch documents pinctrl-names for i2s.
Signed-off-by: Judy Hsiao judyhsiao@chromium.org
Documentation/devicetree/bindings/sound/rockchip-i2s.yaml | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/rockchip-i2s.yaml b/Documentation/devicetree/bindings/sound/rockchip-i2s.yaml index 5ea16b8ef93f..af1069278623 100644 --- a/Documentation/devicetree/bindings/sound/rockchip-i2s.yaml +++ b/Documentation/devicetree/bindings/sound/rockchip-i2s.yaml @@ -61,6 +61,13 @@ properties: - const: tx - const: rx
- pinctrl-names:
- oneOf:
- const: default
- items:
I'm far from a YAML expert, but I think you have the indentation wrong? You want the "const: default" and the "items:" schema to be on the same level of indentation, right?
If you haven't already, you might run through the 'make dt_binding_check' process.
Brian
- const: bclk_on
- const: bclk_off
- power-domains: maxItems: 1
-- 2.36.1.476.g0c4daa206d-goog
The patches series is to fix the unexpected large DC output voltage of Max98357a to burn the speakers on rockchip platform when BCLK and SD_MODE are ON but LRCLK is OFF.
Changes Since V3: -- Fix indentation in the documentation. -- Put pinctrl-1 right after pinctrl-0 in dtsi. -- Fix indentation in the driver. -- Remove unnecessary dev_dbg() in the driver. Changes Since V2: -- Add documents of i2s pinctrl-names. -- Fix dtsi syntax error. -- Include the dtsi change and the driver change in the same series. -- Ensure that driver gets both bclk_on and bclk_off states before using them.
Judy Hsiao (3): ASoC: rockchip: i2s: switch BCLK to GPIO arm64: dts: rk3399: i2s: switch BCLK to GPIO ASoC: dt-bindings: rockchip: Document pinctrl-names for i2s
.../bindings/sound/rockchip-i2s.yaml | 7 + .../boot/dts/rockchip/rk3399-gru-scarlet.dtsi | 10 ++ arch/arm64/boot/dts/rockchip/rk3399.dtsi | 25 ++- sound/soc/rockchip/rockchip_i2s.c | 167 +++++++++++++----- 4 files changed, 162 insertions(+), 47 deletions(-)
We discovered that the state of BCLK on, LRCLK off and SD_MODE on may cause the speaker melting issue. Removing LRCLK while BCLK is present can cause unexpected output behavior including a large DC output voltage as described in the Max98357a datasheet.
In order to: 1. prevent BCLK from turning on by other component. 2. keep BCLK and LRCLK being present at the same time
This patch switches BCLK to GPIO func before LRCLK output, and configures BCLK func back during LRCLK is output.
Without this fix, BCLK is turned on 11 ms earlier than LRCK by the da7219. With this fix, BCLK is turned on only 0.4 ms earlier than LRCK by the rockchip codec.
Signed-off-by: Judy Hsiao judyhsiao@chromium.org --- sound/soc/rockchip/rockchip_i2s.c | 167 ++++++++++++++++++++++-------- 1 file changed, 121 insertions(+), 46 deletions(-)
diff --git a/sound/soc/rockchip/rockchip_i2s.c b/sound/soc/rockchip/rockchip_i2s.c index 47a3971a9ce1..5e3cb06377a1 100644 --- a/sound/soc/rockchip/rockchip_i2s.c +++ b/sound/soc/rockchip/rockchip_i2s.c @@ -54,8 +54,38 @@ 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); @@ -92,39 +122,46 @@ static inline struct rk_i2s_dev *to_info(struct snd_soc_dai *dai) return snd_soc_dai_get_drvdata(dai); }
-static void rockchip_snd_txctrl(struct rk_i2s_dev *i2s, int on) +static int 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) { - regmap_update_bits(i2s->regmap, I2S_DMACR, - I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_ENABLE); - - regmap_update_bits(i2s->regmap, I2S_XFER, - I2S_XFER_TXS_START | I2S_XFER_RXS_START, - I2S_XFER_TXS_START | I2S_XFER_RXS_START); - + ret = regmap_update_bits(i2s->regmap, I2S_DMACR, + 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); + if (ret < 0) + goto end; i2s->tx_start = true; } else { i2s->tx_start = false;
- regmap_update_bits(i2s->regmap, I2S_DMACR, - I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_DISABLE); + ret = regmap_update_bits(i2s->regmap, I2S_DMACR, + I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_DISABLE); + if (ret < 0) + goto end;
if (!i2s->rx_start) { - regmap_update_bits(i2s->regmap, I2S_XFER, - I2S_XFER_TXS_START | - I2S_XFER_RXS_START, - I2S_XFER_TXS_STOP | - I2S_XFER_RXS_STOP); - + 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; udelay(150); - regmap_update_bits(i2s->regmap, I2S_CLR, - I2S_CLR_TXC | I2S_CLR_RXC, - I2S_CLR_TXC | I2S_CLR_RXC); - + 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_read(i2s->regmap, I2S_CLR, &val);
/* Should wait for clear operation to finish */ @@ -138,42 +175,53 @@ static void 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 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) { - regmap_update_bits(i2s->regmap, I2S_DMACR, - I2S_DMACR_RDE_ENABLE, I2S_DMACR_RDE_ENABLE); - - regmap_update_bits(i2s->regmap, I2S_XFER, - I2S_XFER_TXS_START | I2S_XFER_RXS_START, - I2S_XFER_TXS_START | I2S_XFER_RXS_START); - + ret = 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, + 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;
- regmap_update_bits(i2s->regmap, I2S_DMACR, - I2S_DMACR_RDE_ENABLE, I2S_DMACR_RDE_DISABLE); + ret = regmap_update_bits(i2s->regmap, I2S_DMACR, + I2S_DMACR_RDE_ENABLE, I2S_DMACR_RDE_DISABLE); + if (ret < 0) + goto end;
if (!i2s->tx_start) { - regmap_update_bits(i2s->regmap, I2S_XFER, - I2S_XFER_TXS_START | - I2S_XFER_RXS_START, - I2S_XFER_TXS_STOP | - I2S_XFER_RXS_STOP); - + 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; udelay(150); - regmap_update_bits(i2s->regmap, I2S_CLR, - I2S_CLR_TXC | I2S_CLR_RXC, - I2S_CLR_TXC | I2S_CLR_RXC); - + 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_read(i2s->regmap, I2S_CLR, &val);
/* Should wait for clear operation to finish */ @@ -187,7 +235,12 @@ static void 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, @@ -425,17 +478,25 @@ 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) - rockchip_snd_rxctrl(i2s, 1); + ret = rockchip_snd_rxctrl(i2s, 1); else - rockchip_snd_txctrl(i2s, 1); + ret = rockchip_snd_txctrl(i2s, 1); + if (ret < 0) + return ret; + i2s_pinctrl_select_bclk_on(i2s); break; case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_PAUSE_PUSH: - if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) - rockchip_snd_rxctrl(i2s, 0); - else - rockchip_snd_txctrl(i2s, 0); + 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); + } break; default: ret = -EINVAL; @@ -736,6 +797,20 @@ 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"); + + i2s->bclk_on = pinctrl_lookup_state(i2s->pinctrl, "bclk_on"); + 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; + } + } + + i2s_pinctrl_select_bclk_off(i2s);
dev_set_drvdata(&pdev->dev, i2s);
Hi,
On Fri, Jun 17, 2022 at 04:42:49AM +0000, Judy Hsiao wrote:
We discovered that the state of BCLK on, LRCLK off and SD_MODE on may cause the speaker melting issue. Removing LRCLK while BCLK is present can cause unexpected output behavior including a large DC output voltage as described in the Max98357a datasheet.
In order to:
- prevent BCLK from turning on by other component.
- keep BCLK and LRCLK being present at the same time
This patch switches BCLK to GPIO func before LRCLK output, and configures BCLK func back during LRCLK is output.
Without this fix, BCLK is turned on 11 ms earlier than LRCK by the da7219. With this fix, BCLK is turned on only 0.4 ms earlier than LRCK by the rockchip codec.
Signed-off-by: Judy Hsiao judyhsiao@chromium.org
sound/soc/rockchip/rockchip_i2s.c | 167 ++++++++++++++++++++++-------- 1 file changed, 121 insertions(+), 46 deletions(-)
diff --git a/sound/soc/rockchip/rockchip_i2s.c b/sound/soc/rockchip/rockchip_i2s.c index 47a3971a9ce1..5e3cb06377a1 100644 --- a/sound/soc/rockchip/rockchip_i2s.c +++ b/sound/soc/rockchip/rockchip_i2s.c
@@ -92,39 +122,46 @@ static inline struct rk_i2s_dev *to_info(struct snd_soc_dai *dai) return snd_soc_dai_get_drvdata(dai); }
-static void rockchip_snd_txctrl(struct rk_i2s_dev *i2s, int on) +static int 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) {
regmap_update_bits(i2s->regmap, I2S_DMACR,
I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_ENABLE);
regmap_update_bits(i2s->regmap, I2S_XFER,
I2S_XFER_TXS_START | I2S_XFER_RXS_START,
I2S_XFER_TXS_START | I2S_XFER_RXS_START);
ret = regmap_update_bits(i2s->regmap, I2S_DMACR,
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);
This still isn't how I'd expect the indentation to look, but I think I will stop complaining about whitespace. Maybe you can either use 'clang-format' (sparingly), or else see what Mark thinks.
if (ret < 0)
i2s->tx_start = true; } else { i2s->tx_start = false;goto end;
...
static void rockchip_snd_rxctrl(struct rk_i2s_dev *i2s, int on)
I didn't think I needed to call this out, because you already got build bots complaining about this, but... ...did you even compile-test this? You should be making this function return 'int', not 'void', because you're adding return values below.
{ unsigned int val = 0; int retry = 10;
- int ret = 0;
...
+end: spin_unlock(&i2s->lock);
- if (ret < 0)
dev_err(i2s->dev, "lrclk update failed\n");
- return ret;
^^ here.
}
static int rockchip_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
Aside from those, I think this looks OK to the best of my (not-very-familiar with sounds/soc/) ability:
Reviewed-by: Brian Norris briannorris@chromium.org
We discovered that the state of BCLK on, LRCLK off and SD_MODE on may cause the speaker melting issue. Removing LRCLK while BCLK is present can cause unexpected output behavior including a large DC output voltage as described in the Max98357a datasheet.
In order to: 1. prevent BCLK from turning on by other component. 2. keep BCLK and LRCLK being present at the same time
This patch adjusts the device tree to allow BCLK to switch to GPIO func before LRCLK output, and switch back during LRCLK is output.
Signed-off-by: Judy Hsiao judyhsiao@chromium.org Reviewed-by: Brian Norris briannorris@chromium.org --- .../boot/dts/rockchip/rk3399-gru-scarlet.dtsi | 10 ++++++++ arch/arm64/boot/dts/rockchip/rk3399.dtsi | 25 ++++++++++++++++++- 2 files changed, 34 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-gru-scarlet.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-gru-scarlet.dtsi index 913d845eb51a..df1647e9d487 100644 --- a/arch/arm64/boot/dts/rockchip/rk3399-gru-scarlet.dtsi +++ b/arch/arm64/boot/dts/rockchip/rk3399-gru-scarlet.dtsi @@ -766,6 +766,16 @@ &i2s0_8ch_bus { <4 RK_PA0 1 &pcfg_pull_none_6ma>; };
+&i2s0_8ch_bus_bclk_off { + rockchip,pins = + <3 RK_PD0 RK_FUNC_GPIO &pcfg_pull_none_6ma>, + <3 RK_PD1 1 &pcfg_pull_none_6ma>, + <3 RK_PD2 1 &pcfg_pull_none_6ma>, + <3 RK_PD3 1 &pcfg_pull_none_6ma>, + <3 RK_PD7 1 &pcfg_pull_none_6ma>, + <4 RK_PA0 1 &pcfg_pull_none_6ma>; +}; + /* there is no external pull up, so need to set this pin pull up */ &sdmmc_cd_pin { rockchip,pins = <1 RK_PB3 RK_FUNC_GPIO &pcfg_pull_up>; diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi index fbd0346624e6..311c8394cc84 100644 --- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi +++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi @@ -1662,8 +1662,9 @@ i2s0: i2s@ff880000 { dma-names = "tx", "rx"; clock-names = "i2s_clk", "i2s_hclk"; clocks = <&cru SCLK_I2S0_8CH>, <&cru HCLK_I2S0_8CH>; - pinctrl-names = "default"; + pinctrl-names = "bclk_on", "bclk_off"; pinctrl-0 = <&i2s0_8ch_bus>; + pinctrl-1 = <&i2s0_8ch_bus_bclk_off>; power-domains = <&power RK3399_PD_SDIOAUDIO>; #sound-dai-cells = <0>; status = "disabled"; @@ -2407,6 +2408,19 @@ i2s0_8ch_bus: i2s0-8ch-bus { <3 RK_PD7 1 &pcfg_pull_none>, <4 RK_PA0 1 &pcfg_pull_none>; }; + + i2s0_8ch_bus_bclk_off: i2s0-8ch-bus-bclk-off { + rockchip,pins = + <3 RK_PD0 RK_FUNC_GPIO &pcfg_pull_none>, + <3 RK_PD1 1 &pcfg_pull_none>, + <3 RK_PD2 1 &pcfg_pull_none>, + <3 RK_PD3 1 &pcfg_pull_none>, + <3 RK_PD4 1 &pcfg_pull_none>, + <3 RK_PD5 1 &pcfg_pull_none>, + <3 RK_PD6 1 &pcfg_pull_none>, + <3 RK_PD7 1 &pcfg_pull_none>, + <4 RK_PA0 1 &pcfg_pull_none>; + }; };
i2s1 { @@ -2418,6 +2432,15 @@ i2s1_2ch_bus: i2s1-2ch-bus { <4 RK_PA6 1 &pcfg_pull_none>, <4 RK_PA7 1 &pcfg_pull_none>; }; + + i2s1_2ch_bus_bclk_off: i2s1-2ch-bus-bclk-off { + rockchip,pins = + <4 RK_PA3 RK_FUNC_GPIO &pcfg_pull_none>, + <4 RK_PA4 1 &pcfg_pull_none>, + <4 RK_PA5 1 &pcfg_pull_none>, + <4 RK_PA6 1 &pcfg_pull_none>, + <4 RK_PA7 1 &pcfg_pull_none>; + }; };
sdio0 {
This patch documents pinctrl-names for i2s.
Signed-off-by: Judy Hsiao judyhsiao@chromium.org --- Documentation/devicetree/bindings/sound/rockchip-i2s.yaml | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/rockchip-i2s.yaml b/Documentation/devicetree/bindings/sound/rockchip-i2s.yaml index 5ea16b8ef93f..7e36e389e976 100644 --- a/Documentation/devicetree/bindings/sound/rockchip-i2s.yaml +++ b/Documentation/devicetree/bindings/sound/rockchip-i2s.yaml @@ -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
On Fri, Jun 17, 2022 at 04:42:48AM +0000, Judy Hsiao wrote:
The patches series is to fix the unexpected large DC output voltage of Max98357a to burn the speakers on rockchip platform when BCLK and SD_MODE are ON but LRCLK is OFF.
Please don't send new patches in reply to old patches or serieses, this makes it harder for both people and tools to understand what is going on - it can bury things in mailboxes and make it difficult to keep track of what current patches are, both for the new patches and the old ones.
participants (4)
-
Brian Norris
-
Judy Hsiao
-
kernel test robot
-
Mark Brown