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Unverified Commit 61754717 authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Mark Brown
Browse files

ASoC: ti: davinci-mcasp: Move context save/restore to runtime_pm callbacks 



McASP can loose it's context when runtime_pm is disabled.
Save and restore the context when suspending and resuming the device.

Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 8c3590de

sound/soc/ti/davinci-mcasp.c

+64 −72
Original line number Diff line number Diff line
@@ -108,7 +108,7 @@ struct davinci_mcasp { 
	/* Used for comstraint setting on the second stream */

	u32	channels;



#ifdef CONFIG_PM_SLEEP

#ifdef CONFIG_PM

	struct davinci_mcasp_context context;

#endif
@@ -1486,74 +1486,6 @@ static int davinci_mcasp_dai_probe(struct snd_soc_dai *dai) 
	return 0;

}



#ifdef CONFIG_PM_SLEEP

static int davinci_mcasp_suspend(struct snd_soc_dai *dai)

{

	struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);

	struct davinci_mcasp_context *context = &mcasp->context;

	u32 reg;

	int i;



	context->pm_state = pm_runtime_active(mcasp->dev);

	if (!context->pm_state)

		pm_runtime_get_sync(mcasp->dev);



	for (i = 0; i < ARRAY_SIZE(context_regs); i++)

		context->config_regs[i] = mcasp_get_reg(mcasp, context_regs[i]);



	if (mcasp->txnumevt) {

		reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;

		context->afifo_regs[0] = mcasp_get_reg(mcasp, reg);

	}

	if (mcasp->rxnumevt) {

		reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;

		context->afifo_regs[1] = mcasp_get_reg(mcasp, reg);

	}



	for (i = 0; i < mcasp->num_serializer; i++)

		context->xrsr_regs[i] = mcasp_get_reg(mcasp,

						DAVINCI_MCASP_XRSRCTL_REG(i));



	pm_runtime_put_sync(mcasp->dev);



	return 0;

}



static int davinci_mcasp_resume(struct snd_soc_dai *dai)

{

	struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);

	struct davinci_mcasp_context *context = &mcasp->context;

	u32 reg;

	int i;



	pm_runtime_get_sync(mcasp->dev);



	for (i = 0; i < ARRAY_SIZE(context_regs); i++)

		mcasp_set_reg(mcasp, context_regs[i], context->config_regs[i]);



	if (mcasp->txnumevt) {

		reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;

		mcasp_set_reg(mcasp, reg, context->afifo_regs[0]);

	}

	if (mcasp->rxnumevt) {

		reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;

		mcasp_set_reg(mcasp, reg, context->afifo_regs[1]);

	}



	for (i = 0; i < mcasp->num_serializer; i++)

		mcasp_set_reg(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),

			      context->xrsr_regs[i]);



	if (!context->pm_state)

		pm_runtime_put_sync(mcasp->dev);



	return 0;

}

#else

#define davinci_mcasp_suspend NULL

#define davinci_mcasp_resume NULL

#endif



#define DAVINCI_MCASP_RATES	SNDRV_PCM_RATE_8000_192000



#define DAVINCI_MCASP_PCM_FMTS (SNDRV_PCM_FMTBIT_S8 | \
@@ -1571,8 +1503,6 @@ static struct snd_soc_dai_driver davinci_mcasp_dai[] = { 
	{

		.name		= "davinci-mcasp.0",

		.probe		= davinci_mcasp_dai_probe,

		.suspend	= davinci_mcasp_suspend,

		.resume		= davinci_mcasp_resume,

		.playback	= {

			.channels_min	= 1,

			.channels_max	= 32 * 16,
@@ -1976,7 +1906,7 @@ static int davinci_mcasp_probe(struct platform_device *pdev) 
	}



	mcasp->num_serializer = pdata->num_serializer;

#ifdef CONFIG_PM_SLEEP

#ifdef CONFIG_PM

	mcasp->context.xrsr_regs = devm_kcalloc(&pdev->dev,

					mcasp->num_serializer, sizeof(u32),

					GFP_KERNEL);
@@ -2196,11 +2126,73 @@ static int davinci_mcasp_remove(struct platform_device *pdev) 
	return 0;

}



#ifdef CONFIG_PM

static int davinci_mcasp_runtime_suspend(struct device *dev)

{

	struct davinci_mcasp *mcasp = dev_get_drvdata(dev);

	struct davinci_mcasp_context *context = &mcasp->context;

	u32 reg;

	int i;



	for (i = 0; i < ARRAY_SIZE(context_regs); i++)

		context->config_regs[i] = mcasp_get_reg(mcasp, context_regs[i]);



	if (mcasp->txnumevt) {

		reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;

		context->afifo_regs[0] = mcasp_get_reg(mcasp, reg);

	}

	if (mcasp->rxnumevt) {

		reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;

		context->afifo_regs[1] = mcasp_get_reg(mcasp, reg);

	}



	for (i = 0; i < mcasp->num_serializer; i++)

		context->xrsr_regs[i] = mcasp_get_reg(mcasp,

						DAVINCI_MCASP_XRSRCTL_REG(i));



	return 0;

}



static int davinci_mcasp_runtime_resume(struct device *dev)

{

	struct davinci_mcasp *mcasp = dev_get_drvdata(dev);

	struct davinci_mcasp_context *context = &mcasp->context;

	u32 reg;

	int i;



	for (i = 0; i < ARRAY_SIZE(context_regs); i++)

		mcasp_set_reg(mcasp, context_regs[i], context->config_regs[i]);



	if (mcasp->txnumevt) {

		reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;

		mcasp_set_reg(mcasp, reg, context->afifo_regs[0]);

	}

	if (mcasp->rxnumevt) {

		reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;

		mcasp_set_reg(mcasp, reg, context->afifo_regs[1]);

	}



	for (i = 0; i < mcasp->num_serializer; i++)

		mcasp_set_reg(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),

			      context->xrsr_regs[i]);



	return 0;

}



#endif



static const struct dev_pm_ops davinci_mcasp_pm_ops = {

	SET_RUNTIME_PM_OPS(davinci_mcasp_runtime_suspend,

			   davinci_mcasp_runtime_resume,

			   NULL)

};



static struct platform_driver davinci_mcasp_driver = {

	.probe		= davinci_mcasp_probe,

	.remove		= davinci_mcasp_remove,

	.driver		= {

		.name	= "davinci-mcasp",

		.pm     = &davinci_mcasp_pm_ops,

		.of_match_table = mcasp_dt_ids,

	},

};