diff options
Diffstat (limited to 'sound/soc/apple/mca.c')
| -rw-r--r-- | sound/soc/apple/mca.c | 31 |
1 files changed, 23 insertions, 8 deletions
diff --git a/sound/soc/apple/mca.c b/sound/soc/apple/mca.c index 24381c42eb54..64750db9b963 100644 --- a/sound/soc/apple/mca.c +++ b/sound/soc/apple/mca.c @@ -101,7 +101,6 @@ #define SERDES_CONF_UNK3 BIT(14) #define SERDES_CONF_NO_DATA_FEEDBACK BIT(15) #define SERDES_CONF_SYNC_SEL GENMASK(18, 16) -#define SERDES_CONF_SOME_RST BIT(19) #define REG_TX_SERDES_BITSTART 0x08 #define REG_RX_SERDES_BITSTART 0x0c #define REG_TX_SERDES_SLOTMASK 0x0c @@ -203,15 +202,24 @@ static void mca_fe_early_trigger(struct snd_pcm_substream *substream, int cmd, case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_RESUME: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + mca_modify(cl, serdes_conf, SERDES_CONF_SYNC_SEL, + FIELD_PREP(SERDES_CONF_SYNC_SEL, 0)); + mca_modify(cl, serdes_conf, SERDES_CONF_SYNC_SEL, + FIELD_PREP(SERDES_CONF_SYNC_SEL, 7)); mca_modify(cl, serdes_unit + REG_SERDES_STATUS, SERDES_STATUS_EN | SERDES_STATUS_RST, SERDES_STATUS_RST); - mca_modify(cl, serdes_conf, SERDES_CONF_SOME_RST, - SERDES_CONF_SOME_RST); - readl_relaxed(cl->base + serdes_conf); - mca_modify(cl, serdes_conf, SERDES_STATUS_RST, 0); - WARN_ON(readl_relaxed(cl->base + REG_SERDES_STATUS) & + /* + * Experiments suggest that it takes at most ~1 us + * for the bit to clear, so wait 2 us for good measure. + */ + udelay(2); + WARN_ON(readl_relaxed(cl->base + serdes_unit + REG_SERDES_STATUS) & SERDES_STATUS_RST); + mca_modify(cl, serdes_conf, SERDES_CONF_SYNC_SEL, + FIELD_PREP(SERDES_CONF_SYNC_SEL, 0)); + mca_modify(cl, serdes_conf, SERDES_CONF_SYNC_SEL, + FIELD_PREP(SERDES_CONF_SYNC_SEL, cl->no + 1)); break; default: break; @@ -942,10 +950,17 @@ static int mca_pcm_new(struct snd_soc_component *component, chan = mca_request_dma_channel(cl, i); if (IS_ERR_OR_NULL(chan)) { + mca_pcm_free(component, rtd->pcm); + + if (chan && PTR_ERR(chan) == -EPROBE_DEFER) + return PTR_ERR(chan); + dev_err(component->dev, "unable to obtain DMA channel (stream %d cluster %d): %pe\n", i, cl->no, chan); - mca_pcm_free(component, rtd->pcm); - return -EINVAL; + + if (!chan) + return -EINVAL; + return PTR_ERR(chan); } cl->dma_chans[i] = chan; |