[PATCH v3 14/25] ASoC: qcom: qdsp6: Add support to q6afe dai driver

[srinivas . kandagatla]

From: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>

This patch adds support to q6afe backend dais driver.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
---
 sound/soc/qcom/qdsp6/Makefile    |   2 +-
 sound/soc/qcom/qdsp6/q6afe-dai.c | 280 +++++++++++++++++++++++++++++++++++++++
 sound/soc/qcom/qdsp6/q6afe.h     |   3 +
 3 files changed, 284 insertions(+), 1 deletion(-)
 create mode 100644 sound/soc/qcom/qdsp6/q6afe-dai.c

diff --git a/sound/soc/qcom/qdsp6/Makefile b/sound/soc/qcom/qdsp6/Makefile
index 660afcab98fd..c7833842b878 100644
--- a/sound/soc/qcom/qdsp6/Makefile
+++ b/sound/soc/qcom/qdsp6/Makefile
@@ -1,5 +1,5 @@
 obj-$(CONFIG_SND_SOC_QDSP6_COMMON) += q6dsp-common.o
-obj-$(CONFIG_SND_SOC_QDSP6_AFE) += q6afe.o
+obj-$(CONFIG_SND_SOC_QDSP6_AFE) += q6afe.o q6afe-dai.o
 obj-$(CONFIG_SND_SOC_QDSP6_ADM) += q6adm.o q6routing.o
 obj-$(CONFIG_SND_SOC_QDSP6_ASM) += q6asm.o
 obj-$(CONFIG_SND_SOC_QDSP6_CORE) += q6core.o
diff --git a/sound/soc/qcom/qdsp6/q6afe-dai.c b/sound/soc/qcom/qdsp6/q6afe-dai.c
new file mode 100644
index 000000000000..f6a618e9db9e
--- /dev/null
+++ b/sound/soc/qcom/qdsp6/q6afe-dai.c
@@ -0,0 +1,280 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2011-2016, The Linux Foundation
+ * Copyright (c) 2018, Linaro Limited
+ */
+
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/pcm_params.h>
+#include "q6afe.h"
+
+struct q6afe_dai_data {
+	struct q6afe_port *port[AFE_PORT_MAX];
+	struct q6afe_port_config port_config[AFE_PORT_MAX];
+	bool is_port_started[AFE_PORT_MAX];
+};
+
+static int q6hdmi_format_put(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	struct q6afe_dai_data *dai_data = kcontrol->private_data;
+	int value = ucontrol->value.integer.value[0];
+
+	dai_data->port_config[AFE_PORT_HDMI_RX].hdmi.datatype = value;
+
+	return 0;
+}
+
+static int q6hdmi_format_get(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+
+	struct q6afe_dai_data *dai_data = kcontrol->private_data;
+
+	ucontrol->value.integer.value[0] =
+		dai_data->port_config[AFE_PORT_HDMI_RX].hdmi.datatype;
+
+	return 0;
+}
+
+static const char * const hdmi_format[] = {
+	"LPCM",
+	"Compr"
+};
+
+static const struct soc_enum hdmi_config_enum[] = {
+	SOC_ENUM_SINGLE_EXT(2, hdmi_format),
+};
+
+static const struct snd_kcontrol_new q6afe_config_controls[] = {
+	SOC_ENUM_EXT("HDMI RX Format", hdmi_config_enum[0],
+				 q6hdmi_format_get,
+				 q6hdmi_format_put),
+};
+
+static int q6hdmi_hw_params(struct snd_pcm_substream *substream,
+				struct snd_pcm_hw_params *params,
+				struct snd_soc_dai *dai)
+{
+	struct q6afe_dai_data *dai_data = q6afe_get_dai_data(dai->dev);
+	int channels = params_channels(params);
+	struct q6afe_hdmi_cfg *hdmi = &dai_data->port_config[dai->id].hdmi;
+
+	hdmi->sample_rate = params_rate(params);
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		hdmi->bit_width = 16;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		hdmi->bit_width = 24;
+		break;
+	}
+
+	/*refer to HDMI spec CEA-861-E: Table 28 Audio InfoFrame Data Byte 4*/
+	switch (channels) {
+	case 2:
+		hdmi->channel_allocation = 0;
+		break;
+	case 3:
+		hdmi->channel_allocation = 0x02;
+		break;
+	case 4:
+		hdmi->channel_allocation = 0x06;
+		break;
+	case 5:
+		hdmi->channel_allocation = 0x0A;
+		break;
+	case 6:
+		hdmi->channel_allocation = 0x0B;
+		break;
+	case 7:
+		hdmi->channel_allocation = 0x12;
+		break;
+	case 8:
+		hdmi->channel_allocation = 0x13;
+		break;
+	default:
+		dev_err(dai->dev, "invalid Channels = %u\n", channels);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int q6afe_dai_startup(struct snd_pcm_substream *substream,
+				struct snd_soc_dai *dai)
+{
+	struct q6afe_dai_data *dai_data = q6afe_get_dai_data(dai->dev);
+
+	dai_data->is_port_started[dai->id] = false;
+
+	return 0;
+}
+
+static void q6afe_dai_shutdown(struct snd_pcm_substream *substream,
+				struct snd_soc_dai *dai)
+{
+	struct q6afe_dai_data *dai_data = q6afe_get_dai_data(dai->dev);
+	int rc;
+
+	rc = q6afe_port_stop(dai_data->port[dai->id]);
+	if (rc < 0)
+		dev_err(dai->dev, "fail to close AFE port\n");
+
+	dai_data->is_port_started[dai->id] = false;
+
+}
+
+static int q6afe_dai_prepare(struct snd_pcm_substream *substream,
+		struct snd_soc_dai *dai)
+{
+	struct q6afe_dai_data *dai_data = q6afe_get_dai_data(dai->dev);
+	int rc;
+
+	if (dai_data->is_port_started[dai->id]) {
+		/* stop the port and restart with new port config */
+		rc = q6afe_port_stop(dai_data->port[dai->id]);
+		if (rc < 0) {
+			dev_err(dai->dev, "fail to close AFE port\n");
+			return rc;
+		}
+	}
+
+	if (dai->id == AFE_PORT_HDMI_RX)
+		q6afe_hdmi_port_prepare(dai_data->port[dai->id],
+					&dai_data->port_config[dai->id].hdmi);
+
+	rc = q6afe_port_start(dai_data->port[dai->id]);
+	if (rc < 0) {
+		dev_err(dai->dev, "fail to start AFE port %x\n", dai->id);
+		return rc;
+	}
+	dai_data->is_port_started[dai->id] = true;
+
+	return 0;
+}
+
+static const struct snd_soc_dapm_route q6afe_dapm_routes[] = {
+	{"HDMI Playback", NULL, "HDMI_RX"},
+};
+
+static struct snd_soc_dai_ops q6hdmi_ops = {
+	.prepare	= q6afe_dai_prepare,
+	.hw_params	= q6hdmi_hw_params,
+	.shutdown	= q6afe_dai_shutdown,
+	.startup	= q6afe_dai_startup,
+};
+
+static int msm_dai_q6_dai_probe(struct snd_soc_dai *dai)
+{
+	struct q6afe_dai_data *dai_data = q6afe_get_dai_data(dai->dev);
+	struct snd_soc_dapm_context *dapm;
+	struct q6afe_port *port;
+
+	dapm = snd_soc_component_get_dapm(dai->component);
+
+	port = q6afe_port_get_from_id(dai->dev, dai->id);
+	if (IS_ERR(port)) {
+		dev_err(dai->dev, "Unable to get afe port\n");
+		return -EINVAL;
+	}
+	dai_data->port[dai->id] = port;
+
+	return 0;
+}
+
+static int msm_dai_q6_dai_remove(struct snd_soc_dai *dai)
+{
+	struct q6afe_dai_data *dai_data = q6afe_get_dai_data(dai->dev);
+
+	q6afe_port_put(dai_data->port[dai->id]);
+
+	return 0;
+}
+
+static struct snd_soc_dai_driver q6afe_dais[] = {
+	{
+		.playback = {
+			.stream_name = "HDMI Playback",
+			.rates = SNDRV_PCM_RATE_48000 |
+				 SNDRV_PCM_RATE_96000 |
+			 SNDRV_PCM_RATE_192000,
+			.formats = SNDRV_PCM_FMTBIT_S16_LE |
+				   SNDRV_PCM_FMTBIT_S24_LE,
+			.channels_min = 2,
+			.channels_max = 8,
+			.rate_max =     192000,
+			.rate_min =	48000,
+		},
+		.ops = &q6hdmi_ops,
+		.id = AFE_PORT_HDMI_RX,
+		.name = "HDMI",
+		.probe = msm_dai_q6_dai_probe,
+		.remove = msm_dai_q6_dai_remove,
+	},
+};
+
+static int q6afe_of_xlate_dai_name(struct snd_soc_component *component,
+				   struct of_phandle_args *args,
+				   const char **dai_name)
+{
+	int id = args->args[0];
+	int i, ret = -EINVAL;
+
+	for (i = 0; i  < ARRAY_SIZE(q6afe_dais); i++) {
+		if (q6afe_dais[i].id == id) {
+			*dai_name = q6afe_dais[i].name;
+			ret = 0;
+			break;
+		}
+	}
+
+	return ret;
+}
+
+static const struct snd_soc_dapm_widget q6afe_dai_widgets[] = {
+	SND_SOC_DAPM_AIF_OUT("HDMI_RX", "HDMI Playback", 0, 0, 0, 0),
+};
+
+static const struct snd_soc_component_driver q6afe_dai_component = {
+	.name		= "q6afe-dai-component",
+	.dapm_widgets = q6afe_dai_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(q6afe_dai_widgets),
+	.controls = q6afe_config_controls,
+	.num_controls = ARRAY_SIZE(q6afe_config_controls),
+	.dapm_routes = q6afe_dapm_routes,
+	.num_dapm_routes = ARRAY_SIZE(q6afe_dapm_routes),
+	.of_xlate_dai_name = q6afe_of_xlate_dai_name,
+
+};
+
+int q6afe_dai_dev_probe(struct device *dev)
+{
+	int rc = 0;
+	struct q6afe_dai_data *dai_data;
+
+	dai_data = devm_kzalloc(dev, sizeof(*dai_data), GFP_KERNEL);
+	if (!dai_data)
+		rc = -ENOMEM;
+
+	q6afe_set_dai_data(dev, dai_data);
+
+	return  devm_snd_soc_register_component(dev, &q6afe_dai_component,
+					  q6afe_dais, ARRAY_SIZE(q6afe_dais));
+}
+EXPORT_SYMBOL_GPL(q6afe_dai_dev_probe);
+
+int q6afe_dai_dev_remove(struct device *dev)
+{
+	return 0;
+}
+EXPORT_SYMBOL_GPL(q6afe_dai_dev_remove);
+MODULE_DESCRIPTION("Q6 Audio Fronend dai driver");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/qcom/qdsp6/q6afe.h b/sound/soc/qcom/qdsp6/q6afe.h
index 43df524f01bb..647ed2d15545 100644
--- a/sound/soc/qcom/qdsp6/q6afe.h
+++ b/sound/soc/qcom/qdsp6/q6afe.h
@@ -26,6 +26,9 @@ struct q6afe_port;
 void q6afe_set_dai_data(struct device *dev, void *data);
 void *q6afe_get_dai_data(struct device *dev);
 
+int q6afe_dai_dev_probe(struct device *dev);
+int q6afe_dai_dev_remove(struct device *dev);
+
 struct q6afe_port *q6afe_port_get_from_id(struct device *dev, int id);
 int q6afe_port_start(struct q6afe_port *port);
 int q6afe_port_stop(struct q6afe_port *port);
-- 
2.15.1