If anyone else needs this patch, I've cleaned it up a little after re-reading the driver. It should only get applied to H3 (and related) devices with this:
diff --git a/sound/soc/sunxi/sun4i-spdif.c b/sound/soc/sunxi/sun4i-spdif.c
index b4af4aabe..195775605 100644
--- a/sound/soc/sunxi/sun4i-spdif.c
+++ b/sound/soc/sunxi/sun4i-spdif.c
@@ -169,6 +169,7 @@ struct sun4i_spdif_dev {
struct snd_soc_dai_driver cpu_dai_drv;
struct regmap *regmap;
struct snd_dmaengine_dai_dma_data dma_params_tx;
+ unsigned int spdif_clk_mult;
};
static void sun4i_spdif_configure(struct sun4i_spdif_dev *host)
@@ -293,6 +294,8 @@ static int sun4i_spdif_hw_params(struct snd_pcm_substream *substream,
return -EINVAL;
}
+ mclk *= host->spdif_clk_mult;
+
ret = clk_set_rate(host->spdif_clk, mclk);
if (ret < 0) {
dev_err(&pdev->dev,
@@ -327,6 +330,8 @@ static int sun4i_spdif_hw_params(struct snd_pcm_substream *substream,
return -EINVAL;
}
+ mclk_div *= host->spdif_clk_mult;
+
reg_val = 0;
reg_val |= SUN4I_SPDIF_TXCFG_ASS;
reg_val |= fmt; /* set non audio and bit depth */
@@ -408,20 +413,24 @@ static struct snd_soc_dai_driver sun4i_spdif_dai = {
struct sun4i_spdif_quirks {
unsigned int reg_dac_txdata; /* TX FIFO offset for DMA config */
bool has_reset;
+ unsigned int mclk_multiplier;
};
static const struct sun4i_spdif_quirks sun4i_a10_spdif_quirks = {
.reg_dac_txdata = SUN4I_SPDIF_TXFIFO,
+ .mclk_multiplier = 1,
};
static const struct sun4i_spdif_quirks sun6i_a31_spdif_quirks = {
.reg_dac_txdata = SUN4I_SPDIF_TXFIFO,
.has_reset = true,
+ .mclk_multiplier = 1,
};
static const struct sun4i_spdif_quirks sun8i_h3_spdif_quirks = {
.reg_dac_txdata = SUN8I_SPDIF_TXFIFO,
.has_reset = true,
+ .mclk_multiplier = 4,
};
static const struct of_device_id sun4i_spdif_of_match[] = {
@@ -517,6 +526,7 @@ static int sun4i_spdif_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "failed to get a spdif clock.\n");
return PTR_ERR(host->spdif_clk);
}
+ host->spdif_clk_mult = quirks->mclk_multiplier;
host->dma_params_tx.addr = res->start + quirks->reg_dac_txdata;
host->dma_params_tx.maxburst = 8;
