SPDIF core is capable of sending custom status.

Implement IEC958 control handling.

Signed-off-by: Jernej Skrabec jernej.skrabec@gmail.com --- Changes from v1: - return 1 if there was a change in sun4i_spdif_set_status() - added locking for reading and writing status

sound/soc/sunxi/sun4i-spdif.c | 115 ++++++++++++++++++++++++++++++++++ 1 file changed, 115 insertions(+)

diff --git a/sound/soc/sunxi/sun4i-spdif.c b/sound/soc/sunxi/sun4i-spdif.c index a10949bf0ca1..17090f43150e 100644 --- a/sound/soc/sunxi/sun4i-spdif.c +++ b/sound/soc/sunxi/sun4i-spdif.c @@ -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));