Unverified Commit abc7edb0 authored by Claudiu Beznea's avatar Claudiu Beznea Committed by Mark Brown
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ASoC: mchp-spdiftx: add support for system suspend/resume 



Add support for system suspend/resume by moving the enable/disable
of interrupts in mchp_spdiftx_trigger() on SNDRV_PCM_TRIGGER_SUSPEND/
SNDRV_PCM_TRIGGER_RESUME commands.

Signed-off-by: default avatarClaudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20221117123750.291911-4-claudiu.beznea@microchip.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 4bf54ca6

sound/soc/atmel/mchp-spdiftx.c

+13 −9
Original line number Diff line number Diff line
@@ -198,6 +198,7 @@ struct mchp_spdiftx_dev { 
	struct clk				*pclk;

	struct clk				*gclk;

	unsigned int				fmt;

	unsigned int				suspend_irq;

};



static inline int mchp_spdiftx_is_running(struct mchp_spdiftx_dev *dev)
@@ -318,16 +319,25 @@ static int mchp_spdiftx_trigger(struct snd_pcm_substream *substream, int cmd, 
	running = !!(mr & SPDIFTX_MR_TXEN_ENABLE);



	switch (cmd) {

	case SNDRV_PCM_TRIGGER_START:

	case SNDRV_PCM_TRIGGER_RESUME:

	case SNDRV_PCM_TRIGGER_START:

		regmap_write(dev->regmap, SPDIFTX_IER, dev->suspend_irq |

			     SPDIFTX_IR_TXUDR | SPDIFTX_IR_TXOVR);

		dev->suspend_irq = 0;

		fallthrough;

	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:

		if (!running) {

			mr &= ~SPDIFTX_MR_TXEN_MASK;

			mr |= SPDIFTX_MR_TXEN_ENABLE;

		}

		break;

	case SNDRV_PCM_TRIGGER_STOP:

	case SNDRV_PCM_TRIGGER_SUSPEND:

		regmap_read(dev->regmap, SPDIFTX_IMR, &dev->suspend_irq);

		fallthrough;

	case SNDRV_PCM_TRIGGER_STOP:

		regmap_write(dev->regmap, SPDIFTX_IDR, dev->suspend_irq |

			     SPDIFTX_IR_TXUDR | SPDIFTX_IR_TXOVR);

		fallthrough;

	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:

		if (running) {

			mr &= ~SPDIFTX_MR_TXEN_MASK;
@@ -507,10 +517,6 @@ static int mchp_spdiftx_hw_params(struct snd_pcm_substream *substream, 
	dev_dbg(dev->dev, "%s(): GCLK set to %d\n", __func__,

		params_rate(params) * SPDIFTX_GCLK_RATIO);



	/* Enable interrupts */

	regmap_write(dev->regmap, SPDIFTX_IER,

		     SPDIFTX_IR_TXUDR | SPDIFTX_IR_TXOVR);



	regmap_write(dev->regmap, SPDIFTX_MR, mr);



	return 0;
@@ -521,9 +527,6 @@ static int mchp_spdiftx_hw_free(struct snd_pcm_substream *substream, 
{

	struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);



	regmap_write(dev->regmap, SPDIFTX_IDR,

		     SPDIFTX_IR_TXUDR | SPDIFTX_IR_TXOVR);



	return regmap_write(dev->regmap, SPDIFTX_CR,

			    SPDIFTX_CR_SWRST | SPDIFTX_CR_FCLR);

}
@@ -785,6 +788,7 @@ static int mchp_spdiftx_runtime_resume(struct device *dev) 
}



static const struct dev_pm_ops mchp_spdiftx_pm_ops = {

	SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)

	RUNTIME_PM_OPS(mchp_spdiftx_runtime_suspend, mchp_spdiftx_runtime_resume,

		       NULL)

};