ASoC: rockchip: i2s: Add support for set bclk ratio

This patch adds support for set bclk ratio from machine driver.

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Link: https://lore.kernel.org/r/1629950520-14190-1-git-send-email-sugar.zhang@rock-chips.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/rockchip/rockchip_i2s.c b/sound/soc/rockchip/rockchip_i2s.c
index c7dc350..c9d5c52 100644 (file)
--- a/sound/soc/rockchip/rockchip_i2s.c
+++ b/sound/soc/rockchip/rockchip_i2s.c
@@ -49,6 +49,7 @@ struct rk_i2s_dev {
        bool rx_start;
        bool is_master_mode;
        const struct rk_i2s_pins *pins;
+       unsigned int bclk_ratio;
 };
 
 static int i2s_runtime_suspend(struct device *dev)
@@ -278,7 +279,7 @@ static int rockchip_i2s_hw_params(struct snd_pcm_substream *substream,
 
        if (i2s->is_master_mode) {
                mclk_rate = clk_get_rate(i2s->mclk);
-               bclk_rate = 2 * 32 * params_rate(params);
+               bclk_rate = i2s->bclk_ratio * params_rate(params);
                if (bclk_rate == 0 || mclk_rate % bclk_rate)
                        return -EINVAL;
 
@@ -413,6 +414,16 @@ static int rockchip_i2s_trigger(struct snd_pcm_substream *substream,
        return ret;
 }
 
+static int rockchip_i2s_set_bclk_ratio(struct snd_soc_dai *dai,
+                                      unsigned int ratio)
+{
+       struct rk_i2s_dev *i2s = to_info(dai);
+
+       i2s->bclk_ratio = ratio;
+
+       return 0;
+}
+
 static int rockchip_i2s_set_sysclk(struct snd_soc_dai *cpu_dai, int clk_id,
                                   unsigned int freq, int dir)
 {
@@ -441,6 +452,7 @@ static int rockchip_i2s_dai_probe(struct snd_soc_dai *dai)
 
 static const struct snd_soc_dai_ops rockchip_i2s_dai_ops = {
        .hw_params = rockchip_i2s_hw_params,
+       .set_bclk_ratio = rockchip_i2s_set_bclk_ratio,
        .set_sysclk = rockchip_i2s_set_sysclk,
        .set_fmt = rockchip_i2s_set_fmt,
        .trigger = rockchip_i2s_trigger,
@@ -638,6 +650,8 @@ static int rockchip_i2s_probe(struct platform_device *pdev)
        i2s->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
        i2s->capture_dma_data.maxburst = 4;
 
+       i2s->bclk_ratio = 64;
+
        dev_set_drvdata(&pdev->dev, i2s);
 
        pm_runtime_enable(&pdev->dev);