ASoC: Intel: Multiple I/O PCM format support for pipe

For pipes supporting multiple input/output formats, kcontrol is
created and selection of pipe input and output configuration
is done based on control set.

If more than one configuration is supported, then this patch
allows user to select configuration of choice
using amixer settings.

Signed-off-by: Mateusz Gorski <mateusz.gorski@linux.intel.com>
Signed-off-by: Pavan K S <pavan.k.s@intel.com>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200427132727.24942-3-mateusz.gorski@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: Mateusz Gorski

include/uapi/sound/skl-tplg-interface.h

@@ -18,6 +18,7 @@
  */
 #define SKL_CONTROL_TYPE_BYTE_TLV	0x100
 #define SKL_CONTROL_TYPE_MIC_SELECT	0x102
+#define SKL_CONTROL_TYPE_MULTI_IO_SELECT	0x103
 
 #define HDA_SST_CFG_MAX	900 /* size of copier cfg*/
 #define MAX_IN_QUEUE 8

sound/soc/intel/skylake/skl-topology.c

@@ -579,6 +579,38 @@ static int skl_tplg_unload_pipe_modules(struct skl_dev *skl,
 	return ret;
 }
 
+static bool skl_tplg_is_multi_fmt(struct skl_dev *skl, struct skl_pipe *pipe)
+{
+	struct skl_pipe_fmt *cur_fmt;
+	struct skl_pipe_fmt *next_fmt;
+	int i;
+
+	if (pipe->nr_cfgs <= 1)
+		return false;
+
+	if (pipe->conn_type != SKL_PIPE_CONN_TYPE_FE)
+		return true;
+
+	for (i = 0; i < pipe->nr_cfgs - 1; i++) {
+		if (pipe->direction == SNDRV_PCM_STREAM_PLAYBACK) {
+			cur_fmt = &pipe->configs[i].out_fmt;
+			next_fmt = &pipe->configs[i + 1].out_fmt;
+		} else {
+			cur_fmt = &pipe->configs[i].in_fmt;
+			next_fmt = &pipe->configs[i + 1].in_fmt;
+		}
+
+		if (!CHECK_HW_PARAMS(cur_fmt->channels, cur_fmt->freq,
+				     cur_fmt->bps,
+				     next_fmt->channels,
+				     next_fmt->freq,
+				     next_fmt->bps))
+			return true;
+	}
+
+	return false;
+}
+
 /*
  * Here, we select pipe format based on the pipe type and pipe
  * direction to determine the current config index for the pipeline.
@@ -601,6 +633,14 @@ skl_tplg_get_pipe_config(struct skl_dev *skl, struct skl_module_cfg *mconfig)
 		return 0;
 	}
 
+	if (skl_tplg_is_multi_fmt(skl, pipe)) {
+		pipe->cur_config_idx = pipe->pipe_config_idx;
+		pipe->memory_pages = pconfig->mem_pages;
+		dev_dbg(skl->dev, "found pipe config idx:%d\n",
+			pipe->cur_config_idx);
+		return 0;
+	}
+
 	if (pipe->conn_type == SKL_PIPE_CONN_TYPE_NONE) {
 		dev_dbg(skl->dev, "No conn_type detected, take 0th config\n");
 		pipe->cur_config_idx = 0;
@@ -1315,6 +1355,56 @@ static int skl_tplg_pga_event(struct snd_soc_dapm_widget *w,
 	return 0;
 }
 
+static int skl_tplg_multi_config_set_get(struct snd_kcontrol *kcontrol,
+					 struct snd_ctl_elem_value *ucontrol,
+					 bool is_set)
+{
+	struct snd_soc_component *component =
+		snd_soc_kcontrol_component(kcontrol);
+	struct hdac_bus *bus = snd_soc_component_get_drvdata(component);
+	struct skl_dev *skl = bus_to_skl(bus);
+	struct skl_pipeline *ppl;
+	struct skl_pipe *pipe = NULL;
+	struct soc_enum *ec = (struct soc_enum *)kcontrol->private_value;
+	u32 *pipe_id;
+
+	if (!ec)
+		return -EINVAL;
+
+	if (is_set && ucontrol->value.enumerated.item[0] > ec->items)
+		return -EINVAL;
+
+	pipe_id = ec->dobj.private;
+
+	list_for_each_entry(ppl, &skl->ppl_list, node) {
+		if (ppl->pipe->ppl_id == *pipe_id) {
+			pipe = ppl->pipe;
+			break;
+		}
+	}
+	if (!pipe)
+		return -EIO;
+
+	if (is_set)
+		pipe->pipe_config_idx = ucontrol->value.enumerated.item[0];
+	else
+		ucontrol->value.enumerated.item[0]  =  pipe->pipe_config_idx;
+
+	return 0;
+}
+
+static int skl_tplg_multi_config_get(struct snd_kcontrol *kcontrol,
+				     struct snd_ctl_elem_value *ucontrol)
+{
+	return skl_tplg_multi_config_set_get(kcontrol, ucontrol, false);
+}
+
+static int skl_tplg_multi_config_set(struct snd_kcontrol *kcontrol,
+				     struct snd_ctl_elem_value *ucontrol)
+{
+	return skl_tplg_multi_config_set_get(kcontrol, ucontrol, true);
+}
+
 static int skl_tplg_tlv_control_get(struct snd_kcontrol *kcontrol,
 			unsigned int __user *data, unsigned int size)
 {
@@ -1854,6 +1944,11 @@ static const struct snd_soc_tplg_kcontrol_ops skl_tplg_kcontrol_ops[] = {
 		.get = skl_tplg_mic_control_get,
 		.put = skl_tplg_mic_control_set,
 	},
+	{
+		.id = SKL_CONTROL_TYPE_MULTI_IO_SELECT,
+		.get = skl_tplg_multi_config_get,
+		.put = skl_tplg_multi_config_set,
+	},
 };
 
 static int skl_tplg_fill_pipe_cfg(struct device *dev,

sound/soc/intel/skylake/skl-topology.h

@@ -306,6 +306,7 @@ struct skl_pipe {
 	struct skl_path_config configs[SKL_MAX_PATH_CONFIGS];
 	struct list_head w_list;
 	bool passthru;
+	u32 pipe_config_idx;
 };
 
 enum skl_module_state {