Unverified Commit 679de7b6 authored by Jernej Skrabec's avatar Jernej Skrabec Committed by Mark Brown
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ASoC: sunxi: sun4i-spdif: Implement IEC958 control 



SPDIF core is capable of sending custom status.

Implement IEC958 control handling.

Signed-off-by: default avatarJernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/20211117194458.2249643-1-jernej.skrabec@gmail.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 425c5fce

sound/soc/sunxi/sun4i-spdif.c

+115 −0
Original line number Diff line number Diff line
@@ -21,6 +21,8 @@ 
#include <linux/platform_device.h>

#include <linux/pm_runtime.h>

#include <linux/reset.h>

#include <linux/spinlock.h>

#include <sound/asoundef.h>

#include <sound/dmaengine_pcm.h>

#include <sound/pcm_params.h>

#include <sound/soc.h>
@@ -186,6 +188,7 @@ struct sun4i_spdif_dev { 
	struct regmap *regmap;

	struct snd_dmaengine_dai_dma_data dma_params_tx;

	const struct sun4i_spdif_quirks *quirks;

	spinlock_t lock;

};



static void sun4i_spdif_configure(struct sun4i_spdif_dev *host)
@@ -385,11 +388,122 @@ static int sun4i_spdif_trigger(struct snd_pcm_substream *substream, int cmd, 
	return ret;

}



static int sun4i_spdif_info(struct snd_kcontrol *kcontrol,

			    struct snd_ctl_elem_info *uinfo)

{

	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;

	uinfo->count = 1;



	return 0;

}



static int sun4i_spdif_get_status_mask(struct snd_kcontrol *kcontrol,

				       struct snd_ctl_elem_value *ucontrol)

{

	u8 *status = ucontrol->value.iec958.status;



	status[0] = 0xff;

	status[1] = 0xff;

	status[2] = 0xff;

	status[3] = 0xff;

	status[4] = 0xff;

	status[5] = 0x03;



	return 0;

}



static int sun4i_spdif_get_status(struct snd_kcontrol *kcontrol,

				  struct snd_ctl_elem_value *ucontrol)

{

	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);

	struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(cpu_dai);

	u8 *status = ucontrol->value.iec958.status;

	unsigned long flags;

	unsigned int reg;



	spin_lock_irqsave(&host->lock, flags);



	regmap_read(host->regmap, SUN4I_SPDIF_TXCHSTA0, &reg);



	status[0] = reg & 0xff;

	status[1] = (reg >> 8) & 0xff;

	status[2] = (reg >> 16) & 0xff;

	status[3] = (reg >> 24) & 0xff;



	regmap_read(host->regmap, SUN4I_SPDIF_TXCHSTA1, &reg);



	status[4] = reg & 0xff;

	status[5] = (reg >> 8) & 0x3;



	spin_unlock_irqrestore(&host->lock, flags);



	return 0;

}



static int sun4i_spdif_set_status(struct snd_kcontrol *kcontrol,

				  struct snd_ctl_elem_value *ucontrol)

{

	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);

	struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(cpu_dai);

	u8 *status = ucontrol->value.iec958.status;

	unsigned long flags;

	unsigned int reg;

	bool chg0, chg1;



	spin_lock_irqsave(&host->lock, flags);



	reg = (u32)status[3] << 24;

	reg |= (u32)status[2] << 16;

	reg |= (u32)status[1] << 8;

	reg |= (u32)status[0];



	regmap_update_bits_check(host->regmap, SUN4I_SPDIF_TXCHSTA0,

				 GENMASK(31,0), reg, &chg0);



	reg = (u32)status[5] << 8;

	reg |= (u32)status[4];



	regmap_update_bits_check(host->regmap, SUN4I_SPDIF_TXCHSTA1,

				 GENMASK(9,0), reg, &chg1);



	reg = SUN4I_SPDIF_TXCFG_CHSTMODE;

	if (status[0] & IEC958_AES0_NONAUDIO)

		reg |= SUN4I_SPDIF_TXCFG_NONAUDIO;



	regmap_update_bits(host->regmap, SUN4I_SPDIF_TXCFG,

			   SUN4I_SPDIF_TXCFG_CHSTMODE |

			   SUN4I_SPDIF_TXCFG_NONAUDIO, reg);



	spin_unlock_irqrestore(&host->lock, flags);



	return chg0 || chg1;

}



static struct snd_kcontrol_new sun4i_spdif_controls[] = {

	{

		.access = SNDRV_CTL_ELEM_ACCESS_READ,

		.iface = SNDRV_CTL_ELEM_IFACE_PCM,

		.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, MASK),

		.info = sun4i_spdif_info,

		.get = sun4i_spdif_get_status_mask

	},

	{

		.iface = SNDRV_CTL_ELEM_IFACE_PCM,

		.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),

		.info = sun4i_spdif_info,

		.get = sun4i_spdif_get_status,

		.put = sun4i_spdif_set_status

	}

};



static int sun4i_spdif_soc_dai_probe(struct snd_soc_dai *dai)

{

	struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(dai);



	snd_soc_dai_init_dma_data(dai, &host->dma_params_tx, NULL);

	snd_soc_add_dai_controls(dai, sun4i_spdif_controls,

				 ARRAY_SIZE(sun4i_spdif_controls));



	return 0;

}
@@ -512,6 +626,7 @@ static int sun4i_spdif_probe(struct platform_device *pdev) 
		return -ENOMEM;



	host->pdev = pdev;

	spin_lock_init(&host->lock);



	/* Initialize this copy of the CPU DAI driver structure */

	memcpy(&host->cpu_dai_drv, &sun4i_spdif_dai, sizeof(sun4i_spdif_dai));