ASoC: SOF: Add a new op to set up volume table

Add a new op set_up_volume_table for control IPC ops. Define and set
the op for IPC3.
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20220426171743.171061-2-ranjani.sridharan@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/ipc3-control.c

@@ -694,6 +694,23 @@ static int sof_ipc3_widget_kcontrol_setup(struct snd_sof_dev *sdev,
 	return 0;
 }
 
+static int
+sof_ipc3_set_up_volume_table(struct snd_sof_control *scontrol, int tlv[SOF_TLV_ITEMS], int size)
+{
+	int i;
+
+	/* init the volume table */
+	scontrol->volume_table = kcalloc(size, sizeof(u32), GFP_KERNEL);
+	if (!scontrol->volume_table)
+		return -ENOMEM;
+
+	/* populate the volume table */
+	for (i = 0; i < size ; i++)
+		scontrol->volume_table[i] = vol_compute_gain(i, tlv);
+
+	return 0;
+}
+
 const struct sof_ipc_tplg_control_ops tplg_ipc3_control_ops = {
 	.volume_put = sof_ipc3_volume_put,
 	.volume_get = sof_ipc3_volume_get,
@@ -708,4 +725,5 @@ const struct sof_ipc_tplg_control_ops tplg_ipc3_control_ops = {
 	.bytes_ext_volatile_get = sof_ipc3_bytes_ext_volatile_get,
 	.update = sof_ipc3_control_update,
 	.widget_kcontrol_setup = sof_ipc3_widget_kcontrol_setup,
+	.set_up_volume_table = sof_ipc3_set_up_volume_table,
 };

sound/soc/sof/sof-audio.h

@@ -39,6 +39,8 @@
  */
 #define VOLUME_FWL	16
 
+#define SOF_TLV_ITEMS 3
+
 struct snd_sof_widget;
 struct snd_sof_route;
 struct snd_sof_control;
@@ -88,6 +90,9 @@ struct sof_ipc_tplg_control_ops {
 	void (*update)(struct snd_sof_dev *sdev, void *ipc_control_message);
 	/* Optional callback to setup kcontrols associated with an swidget */
 	int (*widget_kcontrol_setup)(struct snd_sof_dev *sdev, struct snd_sof_widget *swidget);
+	/* mandatory callback to set up volume table for volume kcontrols */
+	int (*set_up_volume_table)(struct snd_sof_control *scontrol, int tlv[SOF_TLV_ITEMS],
+				   int size);
 };
 
 /**
@@ -463,4 +468,5 @@ int sof_update_ipc_object(struct snd_soc_component *scomp, void *object, enum so
 			  size_t object_size, int token_instance_num);
 int sof_pcm_setup_connected_widgets(struct snd_sof_dev *sdev, struct snd_soc_pcm_runtime *rtd,
 				    struct snd_sof_pcm *spcm, int dir);
+u32 vol_compute_gain(u32 value, int *tlv);
 #endif

sound/soc/sof/topology.c

@@ -32,7 +32,6 @@
 #define VOL_HALF_DB_STEP	50
 
 /* TLV data items */
-#define TLV_ITEMS	3
 #define TLV_MIN		0
 #define TLV_STEP	1
 #define TLV_MUTE	2
@@ -134,7 +133,7 @@ int sof_update_ipc_object(struct snd_soc_component *scomp, void *object, enum so
 	return 0;
 }
 
-static inline int get_tlv_data(const int *p, int tlv[TLV_ITEMS])
+static inline int get_tlv_data(const int *p, int tlv[SOF_TLV_ITEMS])
 {
 	/* we only support dB scale TLV type at the moment */
 	if ((int)p[SNDRV_CTL_TLVO_TYPE] != SNDRV_CTL_TLVT_DB_SCALE)
@@ -224,7 +223,7 @@ static u32 vol_pow32(u32 a, int exp, u32 fwl)
  * Function to calculate volume gain from TLV data.
  * This function can only handle gain steps that are multiples of 0.5 dB
  */
-static u32 vol_compute_gain(u32 value, int *tlv)
+u32 vol_compute_gain(u32 value, int *tlv)
 {
 	int dB_gain;
 	u32 linear_gain;
@@ -263,20 +262,17 @@ static u32 vol_compute_gain(u32 value, int *tlv)
  * "size" specifies the number of entries in the table
  */
 static int set_up_volume_table(struct snd_sof_control *scontrol,
-			       int tlv[TLV_ITEMS], int size)
+			       int tlv[SOF_TLV_ITEMS], int size)
 {
-	int j;
-
-	/* init the volume table */
-	scontrol->volume_table = kcalloc(size, sizeof(u32), GFP_KERNEL);
-	if (!scontrol->volume_table)
-		return -ENOMEM;
+	struct snd_soc_component *scomp = scontrol->scomp;
+	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
+	const struct sof_ipc_tplg_ops *tplg_ops = sdev->ipc->ops->tplg;
 
-	/* populate the volume table */
-	for (j = 0; j < size ; j++)
-		scontrol->volume_table[j] = vol_compute_gain(j, tlv);
+	if (tplg_ops->control->set_up_volume_table)
+		return tplg_ops->control->set_up_volume_table(scontrol, tlv, size);
 
-	return 0;
+	dev_err(scomp->dev, "Mandatory op %s not set\n", __func__);
+	return -EINVAL;
 }
 
 struct sof_dai_types {
@@ -772,7 +768,7 @@ static int sof_control_load_volume(struct snd_soc_component *scomp,
 	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
 	struct snd_soc_tplg_mixer_control *mc =
 		container_of(hdr, struct snd_soc_tplg_mixer_control, hdr);
-	int tlv[TLV_ITEMS];
+	int tlv[SOF_TLV_ITEMS];
 	unsigned int mask;
 	int ret;