On 09/11/2020 23.21, Kirill Marinushkin wrote:
> Currently, pcm512x driver supports only I2S data format.
> This commit adds RJ and LJ as well.
>
> I don't expect regression WRT existing sound cards, because:
>
> * default value in corresponding register of pcm512x codec is 0 == I2S
> * existing in-tree sound cards with pcm512x codec are configured for I2S
> * i don't see how existing off-tree sound cards with pcm512x codec could be
> configured differently - it would not work
> * tested explicitly, that there is no regression with Raspberry Pi +
> sound card `sound/soc/bcm/hifiberry_dacplus.c`
>
> Signed-off-by: Kirill Marinushkin <kmarinush...@birdec.com>
> Cc: Mark Brown <broo...@kernel.org>
> Cc: Takashi Iwai <ti...@suse.com>
> Cc: Liam Girdwood <lgirdw...@gmail.com>
> Cc: Matthias Reichl <h...@horus.com>
> Cc: Kuninori Morimoto <kuninori.morimoto...@renesas.com>
> Cc: Peter Ujfalusi <peter.ujfal...@ti.com>
> Cc: alsa-de...@alsa-project.org
> Cc: linux-kernel@vger.kernel.org
> ---
> sound/soc/codecs/pcm512x.c | 24 ++++++++++++++++++++++++
> 1 file changed, 24 insertions(+)
>
> diff --git a/sound/soc/codecs/pcm512x.c b/sound/soc/codecs/pcm512x.c
> index 8153d3d01654..c6e975fb4a43 100644
> --- a/sound/soc/codecs/pcm512x.c
> +++ b/sound/soc/codecs/pcm512x.c
> @@ -1167,6 +1167,7 @@ static int pcm512x_hw_params(struct snd_pcm_substream
> *substream,
> struct snd_soc_component *component = dai->component;
> struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component);
> int alen;
> + int afmt;
> int gpio;
> int clock_output;
> int master_mode;
> @@ -1195,6 +1196,22 @@ static int pcm512x_hw_params(struct snd_pcm_substream
> *substream,
> return -EINVAL;
> }
>
> + switch (pcm512x->fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
> + case SND_SOC_DAIFMT_I2S:
> + afmt = PCM512x_AFMT_I2S;
> + break;
> + case SND_SOC_DAIFMT_RIGHT_J:
> + afmt = PCM512x_AFMT_RTJ;
> + break;
> + case SND_SOC_DAIFMT_LEFT_J:
> + afmt = PCM512x_AFMT_LTJ;
> + break;
> + default:
> + dev_err(component->dev, "unsupported DAI format: 0x%x\n",
> + pcm512x->fmt);
> + return -EINVAL;
> + }
> +
The bus format and
> switch (pcm512x->fmt & SND_SOC_DAIFMT_MASTER_MASK) {
> case SND_SOC_DAIFMT_CBS_CFS:
> ret = regmap_update_bits(pcm512x->regmap,
the clock generation role should be set in pcm512x_set_fmt(), in that
way you can deny specific setups earlier.
I would also add DSP_A and DSP_B modes at the same time, DSP_A would
need a write of 1 to register 41 (PCM512x_I2S_2, offset = 1), other
formats should set the offset to 0.
> @@ -1236,6 +1253,13 @@ static int pcm512x_hw_params(struct snd_pcm_substream
> *substream,
> return ret;
> }
>
> + ret = regmap_update_bits(pcm512x->regmap, PCM512x_I2S_1,
> + PCM512x_AFMT, afmt);
> + if (ret != 0) {
> + dev_err(component->dev, "Failed to set data format: %d\n", ret);
> + return ret;
> + }
> +
> if (pcm512x->pll_out) {
> ret = regmap_write(pcm512x->regmap, PCM512x_FLEX_A, 0x11);
> if (ret != 0) {
>
- Péter
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