[RESEND PATCH v2 11/15] ASoC: qcom: qdsp6: Add support to q6afe dai driver

[srinivas.kandagatla@linaro.org]

From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

This patch adds support to q6afe backend dais driver.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
 sound/soc/qcom/Kconfig           |   5 +
 sound/soc/qcom/qdsp6/Makefile    |   1 +
 sound/soc/qcom/qdsp6/q6afe-dai.c | 241 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 247 insertions(+)
 create mode 100644 sound/soc/qcom/qdsp6/q6afe-dai.c

diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
index dd8fb0cde614..003ce182691c 100644
--- a/sound/soc/qcom/Kconfig
+++ b/sound/soc/qcom/Kconfig
@@ -64,6 +64,10 @@ config SND_SOC_QDSP6_ROUTING
 	tristate
 	default n
 
+config SND_SOC_QDSP6_AFE_DAI
+	tristate
+	default n
+
 config SND_SOC_QDSP6
 	tristate "SoC ALSA audio driver for QDSP6"
 	select SND_SOC_QDSP6_AFE
@@ -71,6 +75,7 @@ config SND_SOC_QDSP6
 	select SND_SOC_QDSP6_ASM
 	select SND_SOC_QDSP6_CORE
 	select SND_SOC_QDSP6_ROUTING
+	select SND_SOC_QDSP6_AFE_DAI
 	help
 	 To add support for MSM QDSP6 Soc Audio.
 	 This will enable sound soc platform specific
diff --git a/sound/soc/qcom/qdsp6/Makefile b/sound/soc/qcom/qdsp6/Makefile
index c1ad060a2341..bd8bd02bf09e 100644
--- a/sound/soc/qcom/qdsp6/Makefile
+++ b/sound/soc/qcom/qdsp6/Makefile
@@ -3,3 +3,4 @@ obj-$(CONFIG_SND_SOC_QDSP6_ADM) += q6adm.o
 obj-$(CONFIG_SND_SOC_QDSP6_ASM) += q6asm.o
 obj-$(CONFIG_SND_SOC_QDSP6_CORE) += q6core.o
 obj-$(CONFIG_SND_SOC_QDSP6_ROUTING) += q6routing.o
+obj-$(CONFIG_SND_SOC_QDSP6_AFE_DAI) += q6afe-dai.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..e9865c684bcb
--- /dev/null
+++ b/sound/soc/qcom/qdsp6/q6afe-dai.c
@@ -0,0 +1,241 @@
+/* SPDX-License-Identifier: GPL-2.0
+* Copyright (c) 2011-2016, The Linux Foundation
+* Copyright (c) 2017, 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 q6hdmi_dai_data {
+	struct q6afe_port *port;
+	struct q6afe_hdmi_cfg port_config;
+	bool is_port_started;
+};
+
+static int q6hdmi_format_put(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	struct q6hdmi_dai_data *dai_data = kcontrol->private_data;
+	int value = ucontrol->value.integer.value[0];
+
+	dai_data->port_config.datatype = value;
+
+	return 0;
+}
+
+static int q6hdmi_format_get(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+
+	struct q6hdmi_dai_data *dai_data = kcontrol->private_data;
+
+	ucontrol->value.integer.value[0] =
+		dai_data->port_config.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 hdmi_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 q6hdmi_dai_data *dai_data = dev_get_drvdata(dai->dev);
+	int channels = params_channels(params);
+
+	dai_data->port_config.sample_rate = params_rate(params);
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		dai_data->port_config.bit_width = 16;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		dai_data->port_config.bit_width = 24;
+		break;
+	}
+
+	/*refer to HDMI spec CEA-861-E: Table 28 Audio InfoFrame Data Byte 4*/
+	switch (channels) {
+	case 2:
+		dai_data->port_config.channel_allocation = 0;
+		break;
+	case 3:
+		dai_data->port_config.channel_allocation = 0x02;
+		break;
+	case 4:
+		dai_data->port_config.channel_allocation = 0x06;
+		break;
+	case 5:
+		dai_data->port_config.channel_allocation = 0x0A;
+		break;
+	case 6:
+		dai_data->port_config.channel_allocation = 0x0B;
+		break;
+	case 7:
+		dai_data->port_config.channel_allocation = 0x12;
+		break;
+	case 8:
+		dai_data->port_config.channel_allocation = 0x13;
+		break;
+	default:
+		dev_err(dai->dev, "invalid Channels = %u\n", channels);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int q6hdmi_startup(struct snd_pcm_substream *substream,
+				struct snd_soc_dai *dai)
+{
+	struct q6hdmi_dai_data *dai_data = dev_get_drvdata(dai->dev);
+
+	dai_data->is_port_started = false;
+
+	return 0;
+}
+
+static void q6hdmi_shutdown(struct snd_pcm_substream *substream,
+				struct snd_soc_dai *dai)
+{
+	struct q6hdmi_dai_data *dai_data = dev_get_drvdata(dai->dev);
+	int rc;
+
+	rc = q6afe_port_stop(dai_data->port);
+	if (rc < 0)
+		dev_err(dai->dev, "fail to close AFE port\n");
+
+	dai_data->is_port_started = false;
+
+}
+
+static int q6hdmi_prepare(struct snd_pcm_substream *substream,
+		struct snd_soc_dai *dai)
+{
+	struct q6hdmi_dai_data *dai_data = dev_get_drvdata(dai->dev);
+	int rc;
+
+	if (dai_data->is_port_started) {
+		/* stop the port and restart with new port config */
+		rc = q6afe_port_stop(dai_data->port);
+		if (rc < 0) {
+			dev_err(dai->dev, "fail to close AFE port\n");
+			return rc;
+		}
+	}
+
+	q6afe_hdmi_port_prepare(dai_data->port, &dai_data->port_config);
+	rc = q6afe_port_start(dai_data->port);
+	if (rc < 0) {
+		dev_err(dai->dev, "fail to start AFE port %x\n", dai->id);
+		return rc;
+	}
+	dai_data->is_port_started = true;
+
+	return 0;
+}
+
+static const struct snd_soc_dapm_route hdmi_dapm_routes[] = {
+	{"HDMI Playback", NULL, "HDMI"},
+};
+
+static struct snd_soc_dai_ops q6hdmi_ops = {
+	.prepare	= q6hdmi_prepare,
+	.hw_params	= q6hdmi_hw_params,
+	.shutdown	= q6hdmi_shutdown,
+	.startup	= q6hdmi_startup,
+};
+
+static struct snd_soc_dai_driver q6afe_dai_hdmi_rx = {
+	.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",
+};
+
+static const struct snd_soc_dapm_widget hdmi_dapm_widgets[] = {
+	SND_SOC_DAPM_AIF_OUT("HDMI", "HDMI Playback", 0, 0, 0, 0),
+	SND_SOC_DAPM_OUTPUT("HDMI-RX"),
+};
+
+static const struct snd_soc_component_driver msm_dai_hdmi_q6_component = {
+	.name		= "msm-dai-q6-hdmi",
+	.dapm_widgets = hdmi_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(hdmi_dapm_widgets),
+	.controls = hdmi_config_controls,
+	.num_controls = ARRAY_SIZE(hdmi_config_controls),
+	.dapm_routes = hdmi_dapm_routes,
+	.num_dapm_routes = ARRAY_SIZE(hdmi_dapm_routes),
+};
+
+static int q6afe_dai_dev_probe(struct platform_device *pdev)
+{
+	struct q6hdmi_dai_data *dai_data;
+	int rc = 0;
+	struct q6afe_port *port;
+
+	dai_data = devm_kzalloc(&pdev->dev, sizeof(*dai_data), GFP_KERNEL);
+	if (!dai_data)
+		rc = -ENOMEM;
+
+	port = q6afe_port_get_from_id(&pdev->dev, AFE_PORT_HDMI_RX);
+	if (IS_ERR(port)) {
+		dev_err(&pdev->dev, "Unable to get afe port\n");
+		return -EPROBE_DEFER;
+	}
+	dai_data->port = port;
+	dev_set_drvdata(&pdev->dev, dai_data);
+
+	return devm_snd_soc_register_component(&pdev->dev,
+					  &msm_dai_hdmi_q6_component,
+					  &q6afe_dai_hdmi_rx, 1);
+}
+
+static int q6afe_dai_dev_remove(struct platform_device *pdev)
+{
+	struct q6hdmi_dai_data *dai_data = dev_get_drvdata(&pdev->dev);
+
+	q6afe_port_put(dai_data->port);
+
+	return 0;
+}
+
+static struct platform_driver q6afe_dai_driver = {
+	.probe  = q6afe_dai_dev_probe,
+	.remove = q6afe_dai_dev_remove,
+	.driver = {
+		.name = "q6afe_dai",
+		.owner = THIS_MODULE,
+	},
+};
+
+module_platform_driver(q6afe_dai_driver);
-- 
2.15.0