diff options
Diffstat (limited to 'sound/soc/fsl/imx-spdif.c')
| -rw-r--r-- | sound/soc/fsl/imx-spdif.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/sound/soc/fsl/imx-spdif.c b/sound/soc/fsl/imx-spdif.c index 6c4dadf60355..1a64302aa595 100644 --- a/sound/soc/fsl/imx-spdif.c +++ b/sound/soc/fsl/imx-spdif.c @@ -1,16 +1,44 @@ // SPDX-License-Identifier: GPL-2.0+ // -// Copyright (C) 2013 Freescale Semiconductor, Inc. +// Copyright (C) 2013-2019 Freescale Semiconductor, Inc. #include <linux/module.h> #include <linux/of_platform.h> #include <sound/soc.h> +#include "fsl_spdif.h" struct imx_spdif_data { struct snd_soc_dai_link dai; struct snd_soc_card card; }; +#define CLK_8K_FREQ 24576000 +#define CLK_11K_FREQ 22579200 + +static int imx_spdif_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct device *dev = rtd->card->dev; + int ret = 0; + u64 rate = params_rate(params); + unsigned int freq; + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + freq = do_div(rate, 8000) ? CLK_11K_FREQ : CLK_8K_FREQ; + ret = snd_soc_dai_set_sysclk(rtd->cpu_dai, STC_TXCLK_SPDIF_ROOT, + freq, SND_SOC_CLOCK_OUT); + if (ret) + dev_err(dev, "failed to set cpu sysclk: %d\n", ret); + } + + return ret; +} + +static struct snd_soc_ops imx_spdif_ops = { + .hw_params = imx_spdif_hw_params, +}; + static int imx_spdif_audio_probe(struct platform_device *pdev) { struct device_node *spdif_np, *np = pdev->dev.of_node; @@ -48,6 +76,7 @@ static int imx_spdif_audio_probe(struct platform_device *pdev) data->dai.platforms->of_node = spdif_np; data->dai.playback_only = true; data->dai.capture_only = true; + data->dai.ops = &imx_spdif_ops; if (of_property_read_bool(np, "spdif-out")) data->dai.capture_only = false; |