The MSM DisplayPort driver implements several HDMI codec functions
in the driver, e.g. it manually manages HDMI codec device registration,
returning ELD and plugged_cb support. In order to reduce code
duplication reuse drm_hdmi_audio_* helpers and drm_bridge_connector
integration.

As a part of this change, also drop the call to
drm_connector_attach_dp_subconnector_property(), it is now being handled
by the drm_bridge_connector.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/Kconfig         |   1 +
 drivers/gpu/drm/msm/dp/dp_audio.c   | 131 ++++--------------------------------
 drivers/gpu/drm/msm/dp/dp_audio.h   |  27 ++------
 drivers/gpu/drm/msm/dp/dp_display.c |  28 ++------
 drivers/gpu/drm/msm/dp/dp_display.h |   6 --
 drivers/gpu/drm/msm/dp/dp_drm.c     |   8 +++
 6 files changed, 31 insertions(+), 170 deletions(-)

diff --git a/drivers/gpu/drm/msm/Kconfig b/drivers/gpu/drm/msm/Kconfig
index 7ec833b6d8292f8cb26cfe5582812f2754cd4d35..fe36a3bcfe03994952d1b5e1b423e923e3e3b014 100644
--- a/drivers/gpu/drm/msm/Kconfig
+++ b/drivers/gpu/drm/msm/Kconfig
@@ -104,6 +104,7 @@ config DRM_MSM_DPU
 config DRM_MSM_DP
 	bool "Enable DisplayPort support in MSM DRM driver"
 	depends on DRM_MSM
+	select DRM_DISPLAY_HDMI_AUDIO_HELPER
 	select RATIONAL
 	default y
 	help
diff --git a/drivers/gpu/drm/msm/dp/dp_audio.c b/drivers/gpu/drm/msm/dp/dp_audio.c
index 70fdc9fe228a7149546accd8479a9e4397f3d5dd..f8bfb908f9b4bf93ad5480f0785e3aed23dde160 100644
--- a/drivers/gpu/drm/msm/dp/dp_audio.c
+++ b/drivers/gpu/drm/msm/dp/dp_audio.c
@@ -13,13 +13,13 @@
 
 #include "dp_catalog.h"
 #include "dp_audio.h"
+#include "dp_drm.h"
 #include "dp_panel.h"
 #include "dp_reg.h"
 #include "dp_display.h"
 #include "dp_utils.h"
 
 struct msm_dp_audio_private {
-	struct platform_device *audio_pdev;
 	struct platform_device *pdev;
 	struct drm_device *drm_dev;
 	struct msm_dp_catalog *catalog;
@@ -160,24 +160,11 @@ static void msm_dp_audio_enable(struct msm_dp_audio_private *audio, bool enable)
 	msm_dp_catalog_audio_enable(catalog, enable);
 }
 
-static struct msm_dp_audio_private *msm_dp_audio_get_data(struct platform_device *pdev)
+static struct msm_dp_audio_private *msm_dp_audio_get_data(struct msm_dp *msm_dp_display)
 {
 	struct msm_dp_audio *msm_dp_audio;
-	struct msm_dp *msm_dp_display;
-
-	if (!pdev) {
-		DRM_ERROR("invalid input\n");
-		return ERR_PTR(-ENODEV);
-	}
-
-	msm_dp_display = platform_get_drvdata(pdev);
-	if (!msm_dp_display) {
-		DRM_ERROR("invalid input\n");
-		return ERR_PTR(-ENODEV);
-	}
 
 	msm_dp_audio = msm_dp_display->msm_dp_audio;
-
 	if (!msm_dp_audio) {
 		DRM_ERROR("invalid msm_dp_audio data\n");
 		return ERR_PTR(-EINVAL);
@@ -186,68 +173,16 @@ static struct msm_dp_audio_private *msm_dp_audio_get_data(struct platform_device
 	return container_of(msm_dp_audio, struct msm_dp_audio_private, msm_dp_audio);
 }
 
-static int msm_dp_audio_hook_plugged_cb(struct device *dev, void *data,
-		hdmi_codec_plugged_cb fn,
-		struct device *codec_dev)
-{
-
-	struct platform_device *pdev;
-	struct msm_dp *msm_dp_display;
-
-	pdev = to_platform_device(dev);
-	if (!pdev) {
-		pr_err("invalid input\n");
-		return -ENODEV;
-	}
-
-	msm_dp_display = platform_get_drvdata(pdev);
-	if (!msm_dp_display) {
-		pr_err("invalid input\n");
-		return -ENODEV;
-	}
-
-	return msm_dp_display_set_plugged_cb(msm_dp_display, fn, codec_dev);
-}
-
-static int msm_dp_audio_get_eld(struct device *dev,
-	void *data, uint8_t *buf, size_t len)
-{
-	struct platform_device *pdev;
-	struct msm_dp *msm_dp_display;
-
-	pdev = to_platform_device(dev);
-
-	if (!pdev) {
-		DRM_ERROR("invalid input\n");
-		return -ENODEV;
-	}
-
-	msm_dp_display = platform_get_drvdata(pdev);
-	if (!msm_dp_display) {
-		DRM_ERROR("invalid input\n");
-		return -ENODEV;
-	}
-
-	mutex_lock(&msm_dp_display->connector->eld_mutex);
-	memcpy(buf, msm_dp_display->connector->eld,
-		min(sizeof(msm_dp_display->connector->eld), len));
-	mutex_unlock(&msm_dp_display->connector->eld_mutex);
-
-	return 0;
-}
-
-int msm_dp_audio_hw_params(struct device *dev,
-	void *data,
-	struct hdmi_codec_daifmt *daifmt,
-	struct hdmi_codec_params *params)
+int msm_dp_audio_prepare(struct drm_connector *connector,
+			 struct drm_bridge *bridge,
+			 struct hdmi_codec_daifmt *daifmt,
+			 struct hdmi_codec_params *params)
 {
 	int rc = 0;
 	struct msm_dp_audio_private *audio;
-	struct platform_device *pdev;
 	struct msm_dp *msm_dp_display;
 
-	pdev = to_platform_device(dev);
-	msm_dp_display = platform_get_drvdata(pdev);
+	msm_dp_display = to_dp_bridge(bridge)->msm_dp_display;
 
 	/*
 	 * there could be cases where sound card can be opened even
@@ -262,7 +197,7 @@ int msm_dp_audio_hw_params(struct device *dev,
 		goto end;
 	}
 
-	audio = msm_dp_audio_get_data(pdev);
+	audio = msm_dp_audio_get_data(msm_dp_display);
 	if (IS_ERR(audio)) {
 		rc = PTR_ERR(audio);
 		goto end;
@@ -281,15 +216,14 @@ int msm_dp_audio_hw_params(struct device *dev,
 	return rc;
 }
 
-static void msm_dp_audio_shutdown(struct device *dev, void *data)
+void msm_dp_audio_shutdown(struct drm_connector *connector,
+			   struct drm_bridge *bridge)
 {
 	struct msm_dp_audio_private *audio;
-	struct platform_device *pdev;
 	struct msm_dp *msm_dp_display;
 
-	pdev = to_platform_device(dev);
-	msm_dp_display = platform_get_drvdata(pdev);
-	audio = msm_dp_audio_get_data(pdev);
+	msm_dp_display = to_dp_bridge(bridge)->msm_dp_display;
+	audio = msm_dp_audio_get_data(msm_dp_display);
 	if (IS_ERR(audio)) {
 		DRM_ERROR("failed to get audio data\n");
 		return;
@@ -311,47 +245,6 @@ static void msm_dp_audio_shutdown(struct device *dev, void *data)
 	msm_dp_display_signal_audio_complete(msm_dp_display);
 }
 
-static const struct hdmi_codec_ops msm_dp_audio_codec_ops = {
-	.hw_params = msm_dp_audio_hw_params,
-	.audio_shutdown = msm_dp_audio_shutdown,
-	.get_eld = msm_dp_audio_get_eld,
-	.hook_plugged_cb = msm_dp_audio_hook_plugged_cb,
-};
-
-static struct hdmi_codec_pdata codec_data = {
-	.ops = &msm_dp_audio_codec_ops,
-	.max_i2s_channels = 8,
-	.i2s = 1,
-};
-
-void msm_dp_unregister_audio_driver(struct device *dev, struct msm_dp_audio *msm_dp_audio)
-{
-	struct msm_dp_audio_private *audio_priv;
-
-	audio_priv = container_of(msm_dp_audio, struct msm_dp_audio_private, msm_dp_audio);
-
-	if (audio_priv->audio_pdev) {
-		platform_device_unregister(audio_priv->audio_pdev);
-		audio_priv->audio_pdev = NULL;
-	}
-}
-
-int msm_dp_register_audio_driver(struct device *dev,
-		struct msm_dp_audio *msm_dp_audio)
-{
-	struct msm_dp_audio_private *audio_priv;
-
-	audio_priv = container_of(msm_dp_audio,
-			struct msm_dp_audio_private, msm_dp_audio);
-
-	audio_priv->audio_pdev = platform_device_register_data(dev,
-						HDMI_CODEC_DRV_NAME,
-						PLATFORM_DEVID_AUTO,
-						&codec_data,
-						sizeof(codec_data));
-	return PTR_ERR_OR_ZERO(audio_priv->audio_pdev);
-}
-
 struct msm_dp_audio *msm_dp_audio_get(struct platform_device *pdev,
 			struct msm_dp_catalog *catalog)
 {
diff --git a/drivers/gpu/drm/msm/dp/dp_audio.h b/drivers/gpu/drm/msm/dp/dp_audio.h
index beea34cbab77f31b33873297dc454a9cee446240..58fc14693e48bff2b57ef7278983e5f21ee80ac7 100644
--- a/drivers/gpu/drm/msm/dp/dp_audio.h
+++ b/drivers/gpu/drm/msm/dp/dp_audio.h
@@ -35,23 +35,6 @@ struct msm_dp_audio {
 struct msm_dp_audio *msm_dp_audio_get(struct platform_device *pdev,
 			struct msm_dp_catalog *catalog);
 
-/**
- * msm_dp_register_audio_driver()
- *
- * Registers DP device with hdmi_codec interface.
- *
- * @dev: DP device instance.
- * @msm_dp_audio: an instance of msm_dp_audio module.
- *
- *
- * Returns the error code in case of failure, otherwise
- * zero on success.
- */
-int msm_dp_register_audio_driver(struct device *dev,
-		struct msm_dp_audio *msm_dp_audio);
-
-void msm_dp_unregister_audio_driver(struct device *dev, struct msm_dp_audio *msm_dp_audio);
-
 /**
  * msm_dp_audio_put()
  *
@@ -61,10 +44,12 @@ void msm_dp_unregister_audio_driver(struct device *dev, struct msm_dp_audio *msm
  */
 void msm_dp_audio_put(struct msm_dp_audio *msm_dp_audio);
 
-int msm_dp_audio_hw_params(struct device *dev,
-	void *data,
-	struct hdmi_codec_daifmt *daifmt,
-	struct hdmi_codec_params *params);
+int msm_dp_audio_prepare(struct drm_connector *connector,
+			 struct drm_bridge *bridge,
+			 struct hdmi_codec_daifmt *daifmt,
+			 struct hdmi_codec_params *params);
+void msm_dp_audio_shutdown(struct drm_connector *connector,
+			   struct drm_bridge *bridge);
 
 #endif /* _DP_AUDIO_H_ */
 
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 3898850739abb90a777bc94ede0fb0ceef5e5162..adeb9658fbefcd0645785c660318d2325fd3e705 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -12,6 +12,7 @@
 #include <linux/phy/phy.h>
 #include <linux/delay.h>
 #include <drm/display/drm_dp_aux_bus.h>
+#include <drm/display/drm_hdmi_audio_helper.h>
 #include <drm/drm_edid.h>
 
 #include "msm_drv.h"
@@ -287,13 +288,6 @@ static int msm_dp_display_bind(struct device *dev, struct device *master,
 		goto end;
 	}
 
-
-	rc = msm_dp_register_audio_driver(dev, dp->audio);
-	if (rc) {
-		DRM_ERROR("Audio registration Dp failed\n");
-		goto end;
-	}
-
 	rc = msm_dp_hpd_event_thread_start(dp);
 	if (rc) {
 		DRM_ERROR("Event thread create failed\n");
@@ -315,7 +309,6 @@ static void msm_dp_display_unbind(struct device *dev, struct device *master,
 
 	of_dp_aux_depopulate_bus(dp->aux);
 
-	msm_dp_unregister_audio_driver(dev, dp->audio);
 	msm_dp_aux_unregister(dp->aux);
 	dp->drm_dev = NULL;
 	dp->aux->drm_dev = NULL;
@@ -611,9 +604,9 @@ static void msm_dp_display_handle_plugged_change(struct msm_dp *msm_dp_display,
 			struct msm_dp_display_private, msm_dp_display);
 
 	/* notify audio subsystem only if sink supports audio */
-	if (msm_dp_display->plugged_cb && msm_dp_display->codec_dev &&
-			dp->audio_supported)
-		msm_dp_display->plugged_cb(msm_dp_display->codec_dev, plugged);
+	if (dp->audio_supported)
+		drm_connector_hdmi_audio_plugged_notify(msm_dp_display->connector,
+							plugged);
 }
 
 static int msm_dp_hpd_unplug_handle(struct msm_dp_display_private *dp, u32 data)
@@ -892,19 +885,6 @@ static int msm_dp_display_disable(struct msm_dp_display_private *dp)
 	return 0;
 }
 
-int msm_dp_display_set_plugged_cb(struct msm_dp *msm_dp_display,
-		hdmi_codec_plugged_cb fn, struct device *codec_dev)
-{
-	bool plugged;
-
-	msm_dp_display->plugged_cb = fn;
-	msm_dp_display->codec_dev = codec_dev;
-	plugged = msm_dp_display->link_ready;
-	msm_dp_display_handle_plugged_change(msm_dp_display, plugged);
-
-	return 0;
-}
-
 /**
  * msm_dp_bridge_mode_valid - callback to determine if specified mode is valid
  * @bridge: Pointer to drm bridge structure
diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h
index ecbc2d92f546a346ee53adcf1b060933e4f54317..cc6e2cab36e9c0b1527ff292e547cbb4d69fd95c 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.h
+++ b/drivers/gpu/drm/msm/dp/dp_display.h
@@ -7,7 +7,6 @@
 #define _DP_DISPLAY_H_
 
 #include "dp_panel.h"
-#include <sound/hdmi-codec.h>
 #include "disp/msm_disp_snapshot.h"
 
 #define DP_MAX_PIXEL_CLK_KHZ	675000
@@ -15,7 +14,6 @@
 struct msm_dp {
 	struct drm_device *drm_dev;
 	struct platform_device *pdev;
-	struct device *codec_dev;
 	struct drm_connector *connector;
 	struct drm_bridge *next_bridge;
 	bool link_ready;
@@ -25,14 +23,10 @@ struct msm_dp {
 	bool is_edp;
 	bool internal_hpd;
 
-	hdmi_codec_plugged_cb plugged_cb;
-
 	struct msm_dp_audio *msm_dp_audio;
 	bool psr_supported;
 };
 
-int msm_dp_display_set_plugged_cb(struct msm_dp *msm_dp_display,
-		hdmi_codec_plugged_cb fn, struct device *codec_dev);
 int msm_dp_display_get_modes(struct msm_dp *msm_dp_display);
 bool msm_dp_display_check_video_test(struct msm_dp *msm_dp_display);
 int msm_dp_display_get_test_bpp(struct msm_dp *msm_dp_display);
diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c
index 16b7913d1eefa8c2deb44df201a1977db23f4531..cf2a82c90e7d353757bd242524bdf9655935f5bd 100644
--- a/drivers/gpu/drm/msm/dp/dp_drm.c
+++ b/drivers/gpu/drm/msm/dp/dp_drm.c
@@ -11,6 +11,7 @@
 
 #include "msm_drv.h"
 #include "msm_kms.h"
+#include "dp_audio.h"
 #include "dp_drm.h"
 
 /**
@@ -113,6 +114,9 @@ static const struct drm_bridge_funcs msm_dp_bridge_ops = {
 	.hpd_disable  = msm_dp_bridge_hpd_disable,
 	.hpd_notify   = msm_dp_bridge_hpd_notify,
 	.debugfs_init = msm_dp_bridge_debugfs_init,
+
+	.hdmi_audio_prepare = msm_dp_audio_prepare,
+	.hdmi_audio_shutdown = msm_dp_audio_shutdown,
 };
 
 static int msm_edp_bridge_atomic_check(struct drm_bridge *drm_bridge,
@@ -322,9 +326,13 @@ int msm_dp_bridge_init(struct msm_dp *msm_dp_display, struct drm_device *dev,
 	 */
 	if (!msm_dp_display->is_edp) {
 		bridge->ops =
+			DRM_BRIDGE_OP_HDMI_AUDIO |
 			DRM_BRIDGE_OP_DETECT |
 			DRM_BRIDGE_OP_HPD |
 			DRM_BRIDGE_OP_MODES;
+		bridge->hdmi_audio_dev = &msm_dp_display->pdev->dev;
+		bridge->hdmi_audio_max_i2s_playback_channels = 8;
+		bridge->hdmi_audio_dai_port = -1;
 	}
 
 	rc = devm_drm_bridge_add(dev->dev, bridge);

-- 
2.39.5