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ASoC: rockchip: i2s: add 8 channels capture support 

support max 8 channels capture, please add property
'rockchip,capture-channels' in dts to enable this,
if not, support 2 channels capture default.

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Sugar Zhang 2015-10-08 20:40:07 +08:00 committed by Mark Brown
parent 13531520e3
commit 4c9c018b2a
2 changed files with 48 additions and 2 deletions
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40
sound/soc/rockchip/rockchip_i2s.c
View File

@ -245,8 +245,34 @@ static int rockchip_i2s_hw_params(struct snd_pcm_substream *substream,
return -EINVAL;
}
regmap_update_bits(i2s->regmap, I2S_TXCR, I2S_TXCR_VDW_MASK, val);
regmap_update_bits(i2s->regmap, I2S_RXCR, I2S_RXCR_VDW_MASK, val);
switch (params_channels(params)) {
case 8:
val |= I2S_CHN_8;
break;
case 6:
val |= I2S_CHN_6;
break;
case 4:
val |= I2S_CHN_4;
break;
case 2:
val |= I2S_CHN_2;
break;
default:
dev_err(i2s->dev, "invalid channel: %d\n",
params_channels(params));
return -EINVAL;
}
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
regmap_update_bits(i2s->regmap, I2S_RXCR,
I2S_RXCR_VDW_MASK | I2S_RXCR_CSR_MASK,
val);
else
regmap_update_bits(i2s->regmap, I2S_TXCR,
I2S_TXCR_VDW_MASK | I2S_TXCR_CSR_MASK,
val);
regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_TDL_MASK,
I2S_DMACR_TDL(16));
regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_RDL_MASK,
@ -415,10 +441,12 @@ static const struct regmap_config rockchip_i2s_regmap_config = {
static int rockchip_i2s_probe(struct platform_device *pdev)
{
struct device_node *node = pdev->dev.of_node;
struct rk_i2s_dev *i2s;
struct resource *res;
void __iomem *regs;
int ret;
int val;
i2s = devm_kzalloc(&pdev->dev, sizeof(*i2s), GFP_KERNEL);
if (!i2s) {
@ -475,6 +503,14 @@ static int rockchip_i2s_probe(struct platform_device *pdev)
goto err_pm_disable;
}
/* refine capture channels */
if (!of_property_read_u32(node, "rockchip,capture-channels", &val)) {
if (val >= 2 && val <= 8)
rockchip_i2s_dai.capture.channels_max = val;
else
rockchip_i2s_dai.capture.channels_max = 2;
}
ret = devm_snd_soc_register_component(&pdev->dev,
&rockchip_i2s_component,
&rockchip_i2s_dai, 1);

10
sound/soc/rockchip/rockchip_i2s.h
View File

@ -49,6 +49,9 @@
* RXCR
* receive operation control register
*/
#define I2S_RXCR_CSR_SHIFT 15
#define I2S_RXCR_CSR(x) (x << I2S_RXCR_CSR_SHIFT)
#define I2S_RXCR_CSR_MASK (3 << I2S_RXCR_CSR_SHIFT)
#define I2S_RXCR_HWT BIT(14)
#define I2S_RXCR_SJM_SHIFT 12
#define I2S_RXCR_SJM_R (0 << I2S_RXCR_SJM_SHIFT)
@ -207,6 +210,13 @@ enum {
ROCKCHIP_DIV_BCLK,
};
/* channel select */
#define I2S_CSR_SHIFT 15
#define I2S_CHN_2 (0 << I2S_CSR_SHIFT)
#define I2S_CHN_4 (1 << I2S_CSR_SHIFT)
#define I2S_CHN_6 (2 << I2S_CSR_SHIFT)
#define I2S_CHN_8 (3 << I2S_CSR_SHIFT)
/* I2S REGS */
#define I2S_TXCR (0x0000)
#define I2S_RXCR (0x0004)