[RFC PATCH 20/23] ASoC: qcom: x1e80100: carry WSA VI feedback on the WSA Playback BE link

[Srinivas Kandagatla]

Speaker protection needs the WSA V/I sense capture running whenever the
speakers play.

Set multi_direction_codecs on the WSA Playback link so it can carry the
VI codec DAIs, with a params fixup for their 8 kHz, 32-bit format. The
core's capture stream events for such links power the VI widgets.
Nothing changes until the DT adds the VI DAIs to the link.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxxxxxxxx>
---
 sound/soc/qcom/x1e80100.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/sound/soc/qcom/x1e80100.c b/sound/soc/qcom/x1e80100.c
index c81df41ace88..23a28c60bfb7 100644
--- a/sound/soc/qcom/x1e80100.c
+++ b/sound/soc/qcom/x1e80100.c
@@ -6,6 +6,7 @@
 #include <linux/platform_device.h>
 #include <linux/soundwire/sdw.h>
 #include <sound/pcm.h>
+#include <sound/pcm_params.h>
 #include <sound/jack.h>
 #include <sound/soc.h>
 #include <sound/soc-dapm.h>
@@ -68,6 +69,25 @@ static int x1e80100_snd_init(struct snd_soc_pcm_runtime *rtd)
 	return qcom_snd_wcd_jack_setup(rtd, &data->jack, &data->jack_setup);
 }
 
+/* VI codec DAIs on the WSA playback link run at 8 kHz, S32_LE */
+static int x1e80100_wsa_vi_params_fixup(struct snd_soc_pcm_runtime *rtd,
+					struct snd_pcm_hw_params *params,
+					int stream)
+{
+	struct snd_interval *rate =
+		hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+	struct snd_mask *fmt =
+		hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
+
+	if (stream != SNDRV_PCM_STREAM_CAPTURE)
+		return 0;
+
+	rate->min = rate->max = 8000;
+	snd_mask_none(fmt);
+	snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S32_LE);
+	return 0;
+}
+
 static int x1e80100_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
 				     struct snd_pcm_hw_params *params)
 {
@@ -175,6 +195,13 @@ static void x1e80100_add_be_ops(struct snd_soc_card *card)
 			link->be_hw_params_fixup = x1e80100_be_hw_params_fixup;
 			link->ops = &x1e80100_be_ops;
 		}
+
+		/* The WSA playback link also carries the VI codec DAIs */
+		if (link->id == WSA_CODEC_DMA_RX_0) {
+			link->multi_direction_codecs = 1;
+			link->multi_direction_params_fixup =
+				x1e80100_wsa_vi_params_fixup;
+		}
 	}
 }
 
-- 
2.47.3