openwrt/target/linux/layerscape/patches-5.4/805-display-0007-drm-bridge-cadence-Add-mhdp-audio-driver.patch

From 3cd4b3cfc651c4d54897c72fbbaa9cd583ee6208 Mon Sep 17 00:00:00 2001
From: Sandor Yu <Sandor.yu@nxp.com>
Date: Fri, 30 Aug 2019 17:51:43 +0800
Subject: [PATCH] drm: bridge: cadence: Add mhdp audio driver

Move mhdp audio driver to cadence folder.
Add audio info-frame set function for hdmi tx audio.
The driver suppoer both HDMI and DP audio.

Signed-off-by: Sandor Yu <Sandor.yu@nxp.com>
---
 drivers/gpu/drm/bridge/cadence/Kconfig            |   3 +
 drivers/gpu/drm/bridge/cadence/Makefile           |   3 +-
 drivers/gpu/drm/bridge/cadence/cdns-dp-core.c     |   4 +
 drivers/gpu/drm/bridge/cadence/cdns-hdmi-core.c   |   5 +-
 drivers/gpu/drm/bridge/cadence/cdns-mhdp-audio.c  | 395 ++++++++++++++++++++++
 drivers/gpu/drm/bridge/cadence/cdns-mhdp-common.c | 183 ----------
 drivers/gpu/drm/imx/Kconfig                       |   1 +
 include/drm/bridge/cdns-mhdp-common.h             |   6 +
 8 files changed, 414 insertions(+), 186 deletions(-)
 create mode 100644 drivers/gpu/drm/bridge/cadence/cdns-mhdp-audio.c

--- a/drivers/gpu/drm/bridge/cadence/Kconfig
+++ b/drivers/gpu/drm/bridge/cadence/Kconfig
@@ -11,3 +11,6 @@ config DRM_CDNS_HDMI
 
 config DRM_CDNS_DP
 	tristate "Cadence DP DRM driver"
+
+config DRM_CDNS_AUDIO
+	tristate "Cadence MHDP Audio driver"
--- a/drivers/gpu/drm/bridge/cadence/Makefile
+++ b/drivers/gpu/drm/bridge/cadence/Makefile
@@ -1,5 +1,4 @@
-#ccflags-y := -Iinclude/drm
-
 obj-$(CONFIG_DRM_CDNS_MHDP) += cdns-mhdp-common.o cdns-mhdp-hdmi.o
 obj-$(CONFIG_DRM_CDNS_HDMI) += cdns-hdmi-core.o
 obj-$(CONFIG_DRM_CDNS_DP) += cdns-dp-core.o
+obj-$(CONFIG_DRM_CDNS_AUDIO) += cdns-mhdp-audio.o
--- a/drivers/gpu/drm/bridge/cadence/cdns-dp-core.c
+++ b/drivers/gpu/drm/bridge/cadence/cdns-dp-core.c
@@ -526,6 +526,9 @@ __cdns_dp_probe(struct platform_device *
 
 	dev_set_drvdata(dev, &dp->mhdp);
 	
+	/* register audio driver */
+	cdns_mhdp_register_audio_driver(dev);
+
 	dp_aux_init(&dp->mhdp, dev);
 
 	return dp;
@@ -537,6 +540,7 @@ err_out:
 static void __cdns_dp_remove(struct cdns_mhdp_device *mhdp)
 {
 	dp_aux_destroy(mhdp);
+	cdns_mhdp_unregister_audio_driver(mhdp->dev);
 }
 
 /* -----------------------------------------------------------------------------
--- a/drivers/gpu/drm/bridge/cadence/cdns-hdmi-core.c
+++ b/drivers/gpu/drm/bridge/cadence/cdns-hdmi-core.c
@@ -9,7 +9,6 @@
  * (at your option) any later version.
  *
  */
-
 #include <drm/bridge/cdns-mhdp-imx.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc_helper.h>
@@ -513,6 +512,9 @@ __cdns_hdmi_probe(struct platform_device
 
 	dev_set_drvdata(dev, &hdmi->mhdp);
 
+	/* register audio driver */
+	cdns_mhdp_register_audio_driver(dev);
+
 	return hdmi;
 
 err_out:
@@ -522,6 +524,7 @@ err_out:
 
 static void __cdns_hdmi_remove(struct cdns_mhdp_device *mhdp)
 {
+	cdns_mhdp_unregister_audio_driver(mhdp->dev);
 }
 
 /* -----------------------------------------------------------------------------
--- /dev/null
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp-audio.c
@@ -0,0 +1,395 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
+ * Author: Chris Zhong <zyw@rock-chips.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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/clk.h>
+#include <linux/reset.h>
+#include <drm/bridge/cdns-mhdp-common.h>
+#include <sound/hdmi-codec.h>
+#include <drm/bridge/cdns-mhdp-imx.h>
+#include <drm/drm_of.h>
+#include <drm/drmP.h>
+
+#define CDNS_DP_SPDIF_CLK		200000000
+
+static u32 TMDS_rate_table[7] = {
+	25200, 27000, 54000, 74250, 148500, 297000, 594000,
+};
+
+static u32 N_table_32k[7] = {
+/* 25200/27000/54000/74250/148500/297000/594000 */
+	4096, 4096, 4096, 4096, 4096, 3072, 3072,
+};
+
+static u32 N_table_44k[7] = {
+	6272, 6272, 6272, 6272, 6272, 4704, 9408,
+};
+
+static u32 N_table_48k[7] = {
+	6144, 6144, 6144, 6144, 6144, 5120, 6144,
+};
+
+static int select_N_index(u32 pclk)
+{
+	int num = sizeof(TMDS_rate_table)/sizeof(int);
+	int i = 0;
+
+	for (i = 0; i < num ; i++)
+		if (pclk == TMDS_rate_table[i])
+			break;
+
+	if (i == num) {
+		DRM_WARN("pclkc %d is not supported!\n", pclk);
+		return num-1;
+	}
+
+	return i;
+}
+
+static void hdmi_audio_avi_set(struct cdns_mhdp_device *mhdp,
+						u32 channels)
+{
+	struct hdmi_audio_infoframe frame;
+	u8 buf[32];
+	int ret;
+
+	hdmi_audio_infoframe_init(&frame);
+
+	frame.channels = channels;
+	frame.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
+
+	if (channels == 2)
+		frame.channel_allocation = 0;
+	else if (channels == 4)
+		frame.channel_allocation = 0x3;
+	else if (channels == 8)
+		frame.channel_allocation = 0x13;
+
+	ret = hdmi_audio_infoframe_pack(&frame, buf + 1, sizeof(buf) - 1);
+	if (ret < 0) {
+		DRM_ERROR("failed to pack audio infoframe: %d\n", ret);
+		return;
+	}
+
+	buf[0] = 0;
+
+	cdns_mhdp_infoframe_set(mhdp, 1, sizeof(buf), buf, HDMI_INFOFRAME_TYPE_AUDIO);
+}
+
+int cdns_mhdp_audio_stop(struct cdns_mhdp_device *mhdp,
+			 struct audio_info *audio)
+{
+	int ret;
+
+	if (audio->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
+		ret = cdns_mhdp_reg_write(mhdp, AUDIO_PACK_CONTROL, 0);
+		if (ret) {
+			DRM_DEV_ERROR(mhdp->dev, "audio stop failed: %d\n", ret);
+			return ret;
+		}
+	}
+
+	cdns_mhdp_bus_write(0, mhdp, SPDIF_CTRL_ADDR);
+
+	/* clearn the audio config and reset */
+	cdns_mhdp_bus_write(0, mhdp, AUDIO_SRC_CNTL);
+	cdns_mhdp_bus_write(0, mhdp, AUDIO_SRC_CNFG);
+	cdns_mhdp_bus_write(AUDIO_SW_RST, mhdp, AUDIO_SRC_CNTL);
+	cdns_mhdp_bus_write(0, mhdp, AUDIO_SRC_CNTL);
+
+	/* reset smpl2pckt component  */
+	cdns_mhdp_bus_write(0, mhdp, SMPL2PKT_CNTL);
+	cdns_mhdp_bus_write(AUDIO_SW_RST, mhdp, SMPL2PKT_CNTL);
+	cdns_mhdp_bus_write(0, mhdp, SMPL2PKT_CNTL);
+
+	/* reset FIFO */
+	cdns_mhdp_bus_write(AUDIO_SW_RST, mhdp, FIFO_CNTL);
+	cdns_mhdp_bus_write(0, mhdp, FIFO_CNTL);
+
+	if (audio->format == AFMT_SPDIF_INT)
+		clk_disable_unprepare(mhdp->spdif_clk);
+
+	return 0;
+}
+EXPORT_SYMBOL(cdns_mhdp_audio_stop);
+
+int cdns_mhdp_audio_mute(struct cdns_mhdp_device *mhdp, bool enable)
+{
+	struct audio_info *audio = &mhdp->audio_info;
+	int ret = true;
+
+	if (audio->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
+		ret = cdns_mhdp_reg_write_bit(mhdp, DP_VB_ID, 4, 1, enable);
+		if (ret)
+			DRM_DEV_ERROR(mhdp->dev, "audio mute failed: %d\n", ret);
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL(cdns_mhdp_audio_mute);
+
+static void cdns_mhdp_audio_config_i2s(struct cdns_mhdp_device *mhdp,
+				       struct audio_info *audio)
+{
+	int sub_pckt_num = 1, i2s_port_en_val = 0xf, i;
+	int idx = select_N_index(mhdp->mode.clock);
+	u32 val, ncts;
+
+	if (audio->channels == 2) {
+		if (mhdp->dp.link.num_lanes == 1)
+			sub_pckt_num = 2;
+		else
+			sub_pckt_num = 4;
+
+		i2s_port_en_val = 1;
+	} else if (audio->channels == 4) {
+		i2s_port_en_val = 3;
+	}
+
+	cdns_mhdp_bus_write(0x0, mhdp, SPDIF_CTRL_ADDR);
+
+	cdns_mhdp_bus_write(SYNC_WR_TO_CH_ZERO, mhdp, FIFO_CNTL);
+
+	val = MAX_NUM_CH(audio->channels);
+	val |= NUM_OF_I2S_PORTS(audio->channels);
+	val |= AUDIO_TYPE_LPCM;
+	val |= CFG_SUB_PCKT_NUM(sub_pckt_num);
+	cdns_mhdp_bus_write(val, mhdp, SMPL2PKT_CNFG);
+
+	if (audio->sample_width == 16)
+		val = 0;
+	else if (audio->sample_width == 24)
+		val = 1 << 9;
+	else
+		val = 2 << 9;
+
+	val |= AUDIO_CH_NUM(audio->channels);
+	val |= I2S_DEC_PORT_EN(i2s_port_en_val);
+	val |= TRANS_SMPL_WIDTH_32;
+	cdns_mhdp_bus_write(val, mhdp, AUDIO_SRC_CNFG);
+
+	for (i = 0; i < (audio->channels + 1) / 2; i++) {
+		if (audio->sample_width == 16)
+			val = (0x02 << 8) | (0x02 << 20);
+		else if (audio->sample_width == 24)
+			val = (0x0b << 8) | (0x0b << 20);
+
+		val |= ((2 * i) << 4) | ((2 * i + 1) << 16);
+		cdns_mhdp_bus_write(val, mhdp, STTS_BIT_CH(i));
+	}
+
+	switch (audio->sample_rate) {
+	case 32000:
+		val = SAMPLING_FREQ(3) |
+		      ORIGINAL_SAMP_FREQ(0xc);
+		ncts = N_table_32k[idx];
+		break;
+	case 44100:
+		val = SAMPLING_FREQ(0) |
+		      ORIGINAL_SAMP_FREQ(0xf);
+		ncts = N_table_44k[idx];
+		break;
+	case 48000:
+		val = SAMPLING_FREQ(2) |
+		      ORIGINAL_SAMP_FREQ(0xd);
+		ncts = N_table_48k[idx];
+		break;
+	case 88200:
+		val = SAMPLING_FREQ(8) |
+		      ORIGINAL_SAMP_FREQ(0x7);
+		ncts = N_table_44k[idx] * 2;
+		break;
+	case 96000:
+		val = SAMPLING_FREQ(0xa) |
+		      ORIGINAL_SAMP_FREQ(5);
+		ncts = N_table_48k[idx] * 2;
+		break;
+	case 176400:
+		val = SAMPLING_FREQ(0xc) |
+		      ORIGINAL_SAMP_FREQ(3);
+		ncts = N_table_44k[idx] * 4;
+		break;
+	case 192000:
+	default:
+		val = SAMPLING_FREQ(0xe) |
+		      ORIGINAL_SAMP_FREQ(1);
+		ncts = N_table_48k[idx] * 4;
+		break;
+	}
+	val |= 4;
+	cdns_mhdp_bus_write(val, mhdp, COM_CH_STTS_BITS);
+
+	if (audio->connector_type == DRM_MODE_CONNECTOR_HDMIA)
+		cdns_mhdp_reg_write(mhdp, CM_I2S_CTRL, ncts | 0x4000000);
+
+	cdns_mhdp_bus_write(SMPL2PKT_EN, mhdp, SMPL2PKT_CNTL);
+	cdns_mhdp_bus_write(I2S_DEC_START, mhdp, AUDIO_SRC_CNTL);
+}
+
+static void cdns_mhdp_audio_config_spdif(struct cdns_mhdp_device *mhdp)
+{
+	u32 val;
+
+	cdns_mhdp_bus_write(SYNC_WR_TO_CH_ZERO, mhdp, FIFO_CNTL);
+
+	val = MAX_NUM_CH(2) | AUDIO_TYPE_LPCM | CFG_SUB_PCKT_NUM(4);
+	cdns_mhdp_bus_write(val, mhdp, SMPL2PKT_CNFG);
+	cdns_mhdp_bus_write(SMPL2PKT_EN, mhdp, SMPL2PKT_CNTL);
+
+	val = SPDIF_ENABLE | SPDIF_AVG_SEL | SPDIF_JITTER_BYPASS;
+	cdns_mhdp_bus_write(val, mhdp, SPDIF_CTRL_ADDR);
+
+	clk_prepare_enable(mhdp->spdif_clk);
+	clk_set_rate(mhdp->spdif_clk, CDNS_DP_SPDIF_CLK);
+}
+
+int cdns_mhdp_audio_config(struct cdns_mhdp_device *mhdp,
+			   struct audio_info *audio)
+{
+	int ret;
+
+	/* reset the spdif clk before config */
+	if (audio->format == AFMT_SPDIF_INT) {
+		reset_control_assert(mhdp->spdif_rst);
+		reset_control_deassert(mhdp->spdif_rst);
+	}
+
+	if (audio->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
+		ret = cdns_mhdp_reg_write(mhdp, CM_LANE_CTRL, LANE_REF_CYC);
+		if (ret)
+			goto err_audio_config;
+
+		ret = cdns_mhdp_reg_write(mhdp, CM_CTRL, 0);
+		if (ret)
+			goto err_audio_config;
+	} else {
+		/* HDMI Mode */
+		ret = cdns_mhdp_reg_write(mhdp, CM_CTRL, 8);
+		if (ret)
+			goto err_audio_config;
+	}
+
+	if (audio->format == AFMT_I2S)
+		cdns_mhdp_audio_config_i2s(mhdp, audio);
+	else if (audio->format == AFMT_SPDIF_INT)
+		cdns_mhdp_audio_config_spdif(mhdp);
+
+	if (audio->connector_type == DRM_MODE_CONNECTOR_DisplayPort)
+		ret = cdns_mhdp_reg_write(mhdp, AUDIO_PACK_CONTROL, AUDIO_PACK_EN);
+
+	if (audio->connector_type == DRM_MODE_CONNECTOR_HDMIA)
+		hdmi_audio_avi_set(mhdp, audio->channels);
+
+err_audio_config:
+	if (ret)
+		DRM_DEV_ERROR(mhdp->dev, "audio config failed: %d\n", ret);
+	return ret;
+}
+EXPORT_SYMBOL(cdns_mhdp_audio_config);
+
+static int audio_hw_params(struct device *dev,  void *data,
+				  struct hdmi_codec_daifmt *daifmt,
+				  struct hdmi_codec_params *params)
+{
+	struct cdns_mhdp_device *mhdp = dev_get_drvdata(dev);
+	struct audio_info audio = {
+		.sample_width = params->sample_width,
+		.sample_rate = params->sample_rate,
+		.channels = params->channels,
+		.connector_type = mhdp->connector.base.connector_type,
+	};
+	int ret;
+
+	switch (daifmt->fmt) {
+	case HDMI_I2S:
+		audio.format = AFMT_I2S;
+		break;
+	case HDMI_SPDIF:
+		audio.format = AFMT_SPDIF_EXT;
+		break;
+	default:
+		DRM_DEV_ERROR(dev, "Invalid format %d\n", daifmt->fmt);
+		ret = -EINVAL;
+		goto out;
+	}
+
+	ret = cdns_mhdp_audio_config(mhdp, &audio);
+	if (!ret)
+		mhdp->audio_info = audio;
+
+out:
+	return ret;
+}
+
+static void audio_shutdown(struct device *dev, void *data)
+{
+	struct cdns_mhdp_device *mhdp = dev_get_drvdata(dev);
+	int ret;
+
+	ret = cdns_mhdp_audio_stop(mhdp, &mhdp->audio_info);
+	if (!ret)
+		mhdp->audio_info.format = AFMT_UNUSED;
+}
+
+static int audio_digital_mute(struct device *dev, void *data,
+				     bool enable)
+{
+	struct cdns_mhdp_device *mhdp = dev_get_drvdata(dev);
+	int ret;
+
+	ret = cdns_mhdp_audio_mute(mhdp, enable);
+
+	return ret;
+}
+
+static int audio_get_eld(struct device *dev, void *data,
+				u8 *buf, size_t len)
+{
+	struct cdns_mhdp_device *mhdp = dev_get_drvdata(dev);
+
+	memcpy(buf, mhdp->connector.base.eld,
+	       min(sizeof(mhdp->connector.base.eld), len));
+
+	return 0;
+}
+
+static const struct hdmi_codec_ops audio_codec_ops = {
+	.hw_params = audio_hw_params,
+	.audio_shutdown = audio_shutdown,
+	.digital_mute = audio_digital_mute,
+	.get_eld = audio_get_eld,
+};
+
+int cdns_mhdp_register_audio_driver(struct device *dev)
+{
+	struct cdns_mhdp_device *mhdp = dev_get_drvdata(dev);
+	struct hdmi_codec_pdata codec_data = {
+		.i2s = 1,
+		.spdif = 1,
+		.ops = &audio_codec_ops,
+		.max_i2s_channels = 8,
+	};
+
+	mhdp->audio_pdev = platform_device_register_data(
+			      dev, HDMI_CODEC_DRV_NAME, 1,
+			      &codec_data, sizeof(codec_data));
+
+	return PTR_ERR_OR_ZERO(mhdp->audio_pdev);
+}
+
+void cdns_mhdp_unregister_audio_driver(struct device *dev)
+{
+	struct cdns_mhdp_device *mhdp = dev_get_drvdata(dev);
+
+	platform_device_unregister(mhdp->audio_pdev);
+}
--- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp-common.c
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp-common.c
@@ -937,189 +937,6 @@ err_config_video:
 }
 EXPORT_SYMBOL(cdns_mhdp_config_video);
 
-int cdns_mhdp_audio_stop(struct cdns_mhdp_device *mhdp,
-			 struct audio_info *audio)
-{
-	int ret;
-
-	ret = cdns_mhdp_reg_write(mhdp, AUDIO_PACK_CONTROL, 0);
-	if (ret) {
-		DRM_DEV_ERROR(mhdp->dev, "audio stop failed: %d\n", ret);
-		return ret;
-	}
-
-	cdns_mhdp_bus_write(0, mhdp, SPDIF_CTRL_ADDR);
-
-	/* clearn the audio config and reset */
-	cdns_mhdp_bus_write(0, mhdp, AUDIO_SRC_CNTL);
-	cdns_mhdp_bus_write(0, mhdp, AUDIO_SRC_CNFG);
-	cdns_mhdp_bus_write(AUDIO_SW_RST, mhdp, AUDIO_SRC_CNTL);
-	cdns_mhdp_bus_write(0, mhdp, AUDIO_SRC_CNTL);
-
-	/* reset smpl2pckt component  */
-	cdns_mhdp_bus_write(0, mhdp, SMPL2PKT_CNTL);
-	cdns_mhdp_bus_write(AUDIO_SW_RST, mhdp, SMPL2PKT_CNTL);
-	cdns_mhdp_bus_write(0, mhdp, SMPL2PKT_CNTL);
-
-	/* reset FIFO */
-	cdns_mhdp_bus_write(AUDIO_SW_RST, mhdp, FIFO_CNTL);
-	cdns_mhdp_bus_write(0, mhdp, FIFO_CNTL);
-
-	if (audio->format == AFMT_SPDIF_INT)
-		clk_disable_unprepare(mhdp->spdif_clk);
-
-	return 0;
-}
-EXPORT_SYMBOL(cdns_mhdp_audio_stop);
-
-int cdns_mhdp_audio_mute(struct cdns_mhdp_device *mhdp, bool enable)
-{
-	int ret;
-
-	ret = cdns_mhdp_reg_write_bit(mhdp, DP_VB_ID, 4, 1, enable);
-	if (ret)
-		DRM_DEV_ERROR(mhdp->dev, "audio mute failed: %d\n", ret);
-
-	return ret;
-}
-EXPORT_SYMBOL(cdns_mhdp_audio_mute);
-
-static void cdns_mhdp_audio_config_i2s(struct cdns_mhdp_device *mhdp,
-				       struct audio_info *audio)
-{
-	int sub_pckt_num = 1, i2s_port_en_val = 0xf, i;
-	u32 val;
-
-	if (audio->channels == 2) {
-		if (mhdp->dp.link.num_lanes == 1)
-			sub_pckt_num = 2;
-		else
-			sub_pckt_num = 4;
-
-		i2s_port_en_val = 1;
-	} else if (audio->channels == 4) {
-		i2s_port_en_val = 3;
-	}
-
-	cdns_mhdp_bus_write(0x0, mhdp, SPDIF_CTRL_ADDR);
-
-	cdns_mhdp_bus_write(SYNC_WR_TO_CH_ZERO, mhdp, FIFO_CNTL);
-
-	val = MAX_NUM_CH(audio->channels);
-	val |= NUM_OF_I2S_PORTS(audio->channels);
-	val |= AUDIO_TYPE_LPCM;
-	val |= CFG_SUB_PCKT_NUM(sub_pckt_num);
-	cdns_mhdp_bus_write(val, mhdp, SMPL2PKT_CNFG);
-
-	if (audio->sample_width == 16)
-		val = 0;
-	else if (audio->sample_width == 24)
-		val = 1 << 9;
-	else
-		val = 2 << 9;
-
-	val |= AUDIO_CH_NUM(audio->channels);
-	val |= I2S_DEC_PORT_EN(i2s_port_en_val);
-	val |= TRANS_SMPL_WIDTH_32;
-	cdns_mhdp_bus_write(val, mhdp, AUDIO_SRC_CNFG);
-
-	for (i = 0; i < (audio->channels + 1) / 2; i++) {
-		if (audio->sample_width == 16)
-			val = (0x02 << 8) | (0x02 << 20);
-		else if (audio->sample_width == 24)
-			val = (0x0b << 8) | (0x0b << 20);
-
-		val |= ((2 * i) << 4) | ((2 * i + 1) << 16);
-		cdns_mhdp_bus_write(val, mhdp, STTS_BIT_CH(i));
-	}
-
-	switch (audio->sample_rate) {
-	case 32000:
-		val = SAMPLING_FREQ(3) |
-		      ORIGINAL_SAMP_FREQ(0xc);
-		break;
-	case 44100:
-		val = SAMPLING_FREQ(0) |
-		      ORIGINAL_SAMP_FREQ(0xf);
-		break;
-	case 48000:
-		val = SAMPLING_FREQ(2) |
-		      ORIGINAL_SAMP_FREQ(0xd);
-		break;
-	case 88200:
-		val = SAMPLING_FREQ(8) |
-		      ORIGINAL_SAMP_FREQ(0x7);
-		break;
-	case 96000:
-		val = SAMPLING_FREQ(0xa) |
-		      ORIGINAL_SAMP_FREQ(5);
-		break;
-	case 176400:
-		val = SAMPLING_FREQ(0xc) |
-		      ORIGINAL_SAMP_FREQ(3);
-		break;
-	case 192000:
-		val = SAMPLING_FREQ(0xe) |
-		      ORIGINAL_SAMP_FREQ(1);
-		break;
-	}
-	val |= 4;
-	cdns_mhdp_bus_write(val, mhdp, COM_CH_STTS_BITS);
-
-	cdns_mhdp_bus_write(SMPL2PKT_EN, mhdp, SMPL2PKT_CNTL);
-	cdns_mhdp_bus_write(I2S_DEC_START, mhdp, AUDIO_SRC_CNTL);
-}
-
-static void cdns_mhdp_audio_config_spdif(struct cdns_mhdp_device *mhdp)
-{
-	u32 val;
-
-	cdns_mhdp_bus_write(SYNC_WR_TO_CH_ZERO, mhdp, FIFO_CNTL);
-
-	val = MAX_NUM_CH(2) | AUDIO_TYPE_LPCM | CFG_SUB_PCKT_NUM(4);
-	cdns_mhdp_bus_write(val, mhdp, SMPL2PKT_CNFG);
-	cdns_mhdp_bus_write(SMPL2PKT_EN, mhdp, SMPL2PKT_CNTL);
-
-	val = SPDIF_ENABLE | SPDIF_AVG_SEL | SPDIF_JITTER_BYPASS;
-	cdns_mhdp_bus_write(val, mhdp, SPDIF_CTRL_ADDR);
-
-	clk_prepare_enable(mhdp->spdif_clk);
-	clk_set_rate(mhdp->spdif_clk, CDNS_DP_SPDIF_CLK);
-}
-
-int cdns_mhdp_audio_config(struct cdns_mhdp_device *mhdp,
-			   struct audio_info *audio)
-{
-	int ret;
-
-	/* reset the spdif clk before config */
-	if (audio->format == AFMT_SPDIF_INT) {
-		reset_control_assert(mhdp->spdif_rst);
-		reset_control_deassert(mhdp->spdif_rst);
-	}
-
-	ret = cdns_mhdp_reg_write(mhdp, CM_LANE_CTRL, LANE_REF_CYC);
-	if (ret)
-		goto err_audio_config;
-
-	ret = cdns_mhdp_reg_write(mhdp, CM_CTRL, 0);
-	if (ret)
-		goto err_audio_config;
-
-	if (audio->format == AFMT_I2S)
-		cdns_mhdp_audio_config_i2s(mhdp, audio);
-	else if (audio->format == AFMT_SPDIF_INT)
-		cdns_mhdp_audio_config_spdif(mhdp);
-
-	ret = cdns_mhdp_reg_write(mhdp, AUDIO_PACK_CONTROL, AUDIO_PACK_EN);
-
-err_audio_config:
-	if (ret)
-		DRM_DEV_ERROR(mhdp->dev, "audio config failed: %d\n", ret);
-	return ret;
-}
-EXPORT_SYMBOL(cdns_mhdp_audio_config);
-
 int cdns_mhdp_adjust_lt(struct cdns_mhdp_device *mhdp,
 			u8 nlanes, u16 udelay, u8 *lanes_data, u8 *dpcd)
 {
--- a/drivers/gpu/drm/imx/Kconfig
+++ b/drivers/gpu/drm/imx/Kconfig
@@ -45,6 +45,7 @@ config DRM_IMX_CDNS_MHDP
 	select DRM_CDNS_MHDP
 	select DRM_CDNS_DP
 	select DRM_CDNS_HDMI
+	select DRM_CDNS_AUDIO
 	depends on DRM_IMX
 	help
 	  Choose this if you want to use HDMI on i.MX8.
--- a/include/drm/bridge/cdns-mhdp-common.h
+++ b/include/drm/bridge/cdns-mhdp-common.h
@@ -548,6 +548,7 @@ struct audio_info {
 	int sample_rate;
 	int channels;
 	int sample_width;
+	int connector_type;
 };
 
 enum vic_pxl_encoding_format {
@@ -670,11 +671,16 @@ int cdns_mhdp_get_edid_block(void *mhdp,
 int cdns_mhdp_train_link(struct cdns_mhdp_device *mhdp);
 int cdns_mhdp_set_video_status(struct cdns_mhdp_device *mhdp, int active);
 int cdns_mhdp_config_video(struct cdns_mhdp_device *mhdp);
+
+/* Audio */
 int cdns_mhdp_audio_stop(struct cdns_mhdp_device *mhdp,
 			 struct audio_info *audio);
 int cdns_mhdp_audio_mute(struct cdns_mhdp_device *mhdp, bool enable);
 int cdns_mhdp_audio_config(struct cdns_mhdp_device *mhdp,
 			   struct audio_info *audio);
+int cdns_mhdp_register_audio_driver(struct device *dev);
+void cdns_mhdp_unregister_audio_driver(struct device *dev);
+
 int cdns_mhdp_reg_read(struct cdns_mhdp_device *mhdp, u32 addr);
 int cdns_mhdp_reg_write(struct cdns_mhdp_device *mhdp, u32 addr, u32 val);
 int cdns_mhdp_reg_write_bit(struct cdns_mhdp_device *mhdp, u16 addr,