[alsa-devel] [RFC PATCH 6/9] ASoC: qcom: qdsp6v2: Add support to q6 HDMI dai driver
srinivas.kandagatla at linaro.org
srinivas.kandagatla at linaro.org
Fri Aug 11 15:29:49 CEST 2017
From: Srinivas Kandagatla <srinivas.kandagatla at linaro.org>
This patch adds support to HDMI backend dai driver.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla at linaro.org>
---
.../devicetree/bindings/sound/qcom,q6hdmi.txt | 27 +++
sound/soc/qcom/Kconfig | 4 +
sound/soc/qcom/qdsp6v2/Makefile | 1 +
sound/soc/qcom/qdsp6v2/q6hdmi.c | 258 +++++++++++++++++++++
4 files changed, 290 insertions(+)
create mode 100644 Documentation/devicetree/bindings/sound/qcom,q6hdmi.txt
create mode 100644 sound/soc/qcom/qdsp6v2/q6hdmi.c
diff --git a/Documentation/devicetree/bindings/sound/qcom,q6hdmi.txt b/Documentation/devicetree/bindings/sound/qcom,q6hdmi.txt
new file mode 100644
index 0000000..a38f58a
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/qcom,q6hdmi.txt
@@ -0,0 +1,27 @@
+Qualcomm Q6 HDMI DAI binding
+
+This bindings describe the Qualcomm Q6 HDMI dai.
+
+- compatible:
+
+ Usage: required
+ Value type: <stringlist>
+ Definition: must be "qcom,q6hdmi-v<VERSION-NUMBER>"
+ example: "qcom,q6hdmi-v2"
+- qcom,afe-port:
+ Usage: required
+ Value type: <prop-encoded-array>
+ Definition: handle to AFE port
+
+#sound-dai-cells:
+ Usage: required
+ Value type: <integer>
+ Definition: Must be equal to 0
+
+
+= EXAMPLE
+ q6hdmi {
+ compatible = "qcom,q6hdmi-v2";
+ qcom,afe-port = <&afe AFE_PORT_HDMI_RX>;
+ #sound-dai-cells = <0>;
+ };
diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
index 9a5b3f0..5035d37 100644
--- a/sound/soc/qcom/Kconfig
+++ b/sound/soc/qcom/Kconfig
@@ -60,6 +60,9 @@ config SND_SOC_QDSP6V2_ROUTING
tristate
default n
+config SND_SOC_QDSP6V2_HDMI
+ tristate
+ default n
config SND_SOC_QDSP6V2
tristate "SoC ALSA audio driver for QDSP6V2"
@@ -67,6 +70,7 @@ config SND_SOC_QDSP6V2
select SND_SOC_QDSP6V2_ADM
select SND_SOC_QDSP6V2_ASM
select SND_SOC_QDSP6V2_ROUTING
+ select SND_SOC_QDSP6V2_HDMI
help
To add support for MSM QDSP6V2 Soc Audio.
This will enable sound soc platform specific
diff --git a/sound/soc/qcom/qdsp6v2/Makefile b/sound/soc/qcom/qdsp6v2/Makefile
index 81d2341..4cab915 100644
--- a/sound/soc/qcom/qdsp6v2/Makefile
+++ b/sound/soc/qcom/qdsp6v2/Makefile
@@ -2,3 +2,4 @@ obj-$(CONFIG_SND_SOC_QDSP6V2_AFE) += q6afe.o
obj-$(CONFIG_SND_SOC_QDSP6V2_ADM) += q6adm.o
obj-$(CONFIG_SND_SOC_QDSP6V2_ASM) += q6asm.o
obj-$(CONFIG_SND_SOC_QDSP6V2_ROUTING) += q6routing.o
+obj-$(CONFIG_SND_SOC_QDSP6V2_HDMI) += q6hdmi.o
diff --git a/sound/soc/qcom/qdsp6v2/q6hdmi.c b/sound/soc/qcom/qdsp6v2/q6hdmi.c
new file mode 100644
index 0000000..020a377
--- /dev/null
+++ b/sound/soc/qcom/qdsp6v2/q6hdmi.c
@@ -0,0 +1,258 @@
+/* Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#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 <dt-bindings/sound/qcom,afe.h>
+#include "q6afe-v2.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); /* can block */
+ if (rc < 0) {
+ dev_err(dai->dev, "fail to close AFE port\n");
+ return rc;
+ }
+ }
+
+ rc = q6afe_hdmi_port_start(dai_data->port, &dai_data->port_config);
+ if (rc < 0) {
+ dev_err(dai->dev, "fail to open 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 q6hdmi_hdmi_rx_dai = {
+ .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,
+ .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 q6hdmi_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(&pdev->dev, "qcom,afe-port");
+ if (IS_ERR(port)) {
+ dev_err(&pdev->dev, "Unable to get afe port\n");
+ return -EPROBE_DEFER;
+ }
+ dai_data->port = port;
+ q6hdmi_hdmi_rx_dai.id = q6afe_get_port_index(port);
+ dev_set_drvdata(&pdev->dev, dai_data);
+
+ return snd_soc_register_component(&pdev->dev,
+ &msm_dai_hdmi_q6_component,
+ &q6hdmi_hdmi_rx_dai, 1);
+}
+
+static int q6hdmi_dev_remove(struct platform_device *pdev)
+{
+ struct q6hdmi_dai_data *dai_data = dev_get_drvdata(&pdev->dev);
+
+ q6afe_port_put(dai_data->port);
+ snd_soc_unregister_component(&pdev->dev);
+
+ return 0;
+}
+
+static const struct of_device_id q6hdmi_dt_match[] = {
+ {.compatible = "qcom,q6hdmi-v2"},
+ {}
+};
+MODULE_DEVICE_TABLE(of, q6hdmi_dt_match);
+
+static struct platform_driver q6hdmi_driver = {
+ .probe = q6hdmi_dev_probe,
+ .remove = q6hdmi_dev_remove,
+ .driver = {
+ .name = "q6-hdmi",
+ .owner = THIS_MODULE,
+ .of_match_table = q6hdmi_dt_match,
+ },
+};
+
+module_platform_driver(q6hdmi_driver);
--
2.9.3
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