ASoC: sti: unip player tdm mode

here are the changes to enable player tdm mode:
- When TDM_ENABLE is set to 1, the i2s format should be automatically
configured. Unfortunately this is not the case (HW bug). Then, we shall
force DATA_SIZE setting.
- Compute the transfer size for tdm mode: transfer size = user frame size
- Manage tdm slots configuration given in DT.
- Don't use mclk-fs when unip in tdm mode; use tdm slot config to compute
frame size and to set mclk rate.
- Refine the hw param (channels & format) according to tdm slot config.

Signed-off-by: Moise Gergaud <moise.gergaud@st.com>
Acked-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 7 insertions, 1 deletions

diff --git a/sound/soc/sti/sti_uniperif.c b/sound/soc/sti/sti_uniperif.c
index d49badec9e62..488ef4ed8fba 100644
--- a/sound/soc/sti/sti_uniperif.c
+++ b/sound/soc/sti/sti_uniperif.c
@@ -181,10 +181,16 @@ int sti_uniperiph_dai_hw_params(struct snd_pcm_substream *substream,
 				struct snd_pcm_hw_params *params,
 				struct snd_soc_dai *dai)
 {
+	struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
+	struct uniperif *uni = priv->dai_data.uni;
 	struct snd_dmaengine_dai_dma_data *dma_data;
 	int transfer_size;
 
-	transfer_size = params_channels(params) * UNIPERIF_FIFO_FRAMES;
+	if (uni->info->type == SND_ST_UNIPERIF_TYPE_TDM)
+		/* transfer size = user frame size (in 32-bits FIFO cell) */
+		transfer_size = snd_soc_params_to_frame_size(params) / 32;
+	else
+		transfer_size = params_channels(params) * UNIPERIF_FIFO_FRAMES;
 
 	dma_data = snd_soc_dai_get_dma_data(dai, substream);
 	dma_data->maxburst = transfer_size;