Add necessary glue code to be able to use new HDMI codec framework from
the DRM bridge drivers. The drm_bridge implements a limited set of the
hdmi_codec_ops interface, with the functions accepting both
drm_connector and drm_bridge instead of just a generic void pointer.
This framework is integrated with the DRM HDMI Connector framework, but
can also be used for DisplayPort connectors.
Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
---
drivers/gpu/drm/display/drm_bridge_connector.c | 95 +++++++++++++++++++++++++-
include/drm/drm_bridge.h | 23 +++++++
2 files changed, 116 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/display/drm_bridge_connector.c
b/drivers/gpu/drm/display/drm_bridge_connector.c
index
320c297008aaa8b6ef5b1f4c71928849b202e8ac..12ab9f14cc8a8672478ae2804c9a68d766d88ea5
100644
--- a/drivers/gpu/drm/display/drm_bridge_connector.c
+++ b/drivers/gpu/drm/display/drm_bridge_connector.c
@@ -20,6 +20,8 @@
#include <drm/drm_probe_helper.h>
#include <drm/display/drm_hdmi_state_helper.h>
+#include <sound/hdmi-codec.h>
+
/**
* DOC: overview
*
@@ -354,10 +356,80 @@ static int drm_bridge_connector_write_infoframe(struct
drm_connector *connector,
return bridge->funcs->hdmi_write_infoframe(bridge, type, buffer, len);
}
+static int drm_bridge_connector_audio_startup(struct drm_connector *connector)
+{
+ struct drm_bridge_connector *bridge_connector =
+ to_drm_bridge_connector(connector);
+ struct drm_bridge *bridge;
+
+ bridge = bridge_connector->bridge_hdmi;
+ if (!bridge)
+ return -EINVAL;
+
+ if (bridge->funcs->hdmi_codec_audio_startup)
+ return bridge->funcs->hdmi_codec_audio_startup(connector,
bridge);
+ else
+ return 0;
+}
+
+static int drm_bridge_connector_prepare(struct drm_connector *connector,
+ struct hdmi_codec_daifmt *fmt,
+ struct hdmi_codec_params *hparms)
+{
+ struct drm_bridge_connector *bridge_connector =
+ to_drm_bridge_connector(connector);
+ struct drm_bridge *bridge;
+
+ bridge = bridge_connector->bridge_hdmi;
+ if (!bridge)
+ return -EINVAL;
+
+ return bridge->funcs->hdmi_codec_prepare(connector, bridge, fmt,
hparms);
+}
+
+static void drm_bridge_connector_audio_shutdown(struct drm_connector
*connector)
+{
+ struct drm_bridge_connector *bridge_connector =
+ to_drm_bridge_connector(connector);
+ struct drm_bridge *bridge;
+
+ bridge = bridge_connector->bridge_hdmi;
+ if (!bridge)
+ return;
+
+ bridge->funcs->hdmi_codec_audio_shutdown(connector, bridge);
+}
+
+static int drm_bridge_connector_mute_stream(struct drm_connector *connector,
+ bool enable, int direction)
+{
+ struct drm_bridge_connector *bridge_connector =
+ to_drm_bridge_connector(connector);
+ struct drm_bridge *bridge;
+
+ bridge = bridge_connector->bridge_hdmi;
+ if (!bridge)
+ return -EINVAL;
+
+ if (bridge->funcs->hdmi_codec_mute_stream)
+ return bridge->funcs->hdmi_codec_mute_stream(connector, bridge,
+ enable, direction);
+ else
+ return -ENOTSUPP;
+}
+
+static const struct drm_connector_hdmi_codec_funcs
drm_bridge_connector_hdmi_codec_funcs = {
+ .audio_startup = drm_bridge_connector_audio_startup,
+ .prepare = drm_bridge_connector_prepare,
+ .audio_shutdown = drm_bridge_connector_audio_shutdown,
+ .mute_stream = drm_bridge_connector_mute_stream,
+};
+
static const struct drm_connector_hdmi_funcs drm_bridge_connector_hdmi_funcs =
{
.tmds_char_rate_valid = drm_bridge_connector_tmds_char_rate_valid,
.clear_infoframe = drm_bridge_connector_clear_infoframe,
.write_infoframe = drm_bridge_connector_write_infoframe,
+ .codec_funcs = &drm_bridge_connector_hdmi_codec_funcs,
};
/*
-----------------------------------------------------------------------------
@@ -459,7 +531,25 @@ struct drm_connector *drm_bridge_connector_init(struct
drm_device *drm,
if (connector_type == DRM_MODE_CONNECTOR_Unknown)
return ERR_PTR(-EINVAL);
- if (bridge_connector->bridge_hdmi)
+ if (bridge_connector->bridge_hdmi) {
+ bridge = bridge_connector->bridge_hdmi;
+
+ if (bridge->hdmi_codec_i2s ||
+ bridge->hdmi_codec_spdif) {
+ if (!bridge->funcs->hdmi_codec_prepare ||
+ !bridge->funcs->hdmi_codec_audio_shutdown)
+ return ERR_PTR(-EINVAL);
+
+ bridge_connector->bridge_hdmi = bridge;
+
+ connector->hdmi_codec.dev = bridge->hdmi_codec_dev;
+ connector->hdmi_codec.i2s = bridge->hdmi_codec_i2s;
+ connector->hdmi_codec.spdif = bridge->hdmi_codec_spdif;
+ connector->hdmi_codec.max_i2s_channels =
+ bridge->hdmi_codec_max_i2s_channels;
+ connector->hdmi_codec.sound_dai_port =
bridge->hdmi_codec_dai_port;
+ }
+
ret = drmm_connector_hdmi_init(drm, connector,
bridge_connector->bridge_hdmi->vendor,
bridge_connector->bridge_hdmi->product,
@@ -468,10 +558,11 @@ struct drm_connector *drm_bridge_connector_init(struct
drm_device *drm,
connector_type, ddc,
supported_formats,
max_bpc);
- else
+ } else {
ret = drmm_connector_init(drm, connector,
&drm_bridge_connector_funcs,
connector_type, ddc);
+ }
if (ret)
return ERR_PTR(ret);
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
index
e8d735b7f6a480468c88287e2517b387ceec0f22..0ef9580ef6669f84327bdcb85a24fc83f76541bb
100644
--- a/include/drm/drm_bridge.h
+++ b/include/drm/drm_bridge.h
@@ -41,6 +41,8 @@ struct drm_display_info;
struct drm_minor;
struct drm_panel;
struct edid;
+struct hdmi_codec_daifmt;
+struct hdmi_codec_params;
struct i2c_adapter;
/**
@@ -676,6 +678,21 @@ struct drm_bridge_funcs {
enum hdmi_infoframe_type type,
const u8 *buffer, size_t len);
+ int (*hdmi_codec_audio_startup)(struct drm_connector *connector,
+ struct drm_bridge *bridge);
+
+ int (*hdmi_codec_prepare)(struct drm_connector *connector,
+ struct drm_bridge *bridge,
+ struct hdmi_codec_daifmt *fmt,
+ struct hdmi_codec_params *hparms);
+
+ void (*hdmi_codec_audio_shutdown)(struct drm_connector *connector,
+ struct drm_bridge *bridge);
+
+ int (*hdmi_codec_mute_stream)(struct drm_connector *connector,
+ struct drm_bridge *bridge,
+ bool enable, int direction);
+
/**
* @debugfs_init:
*
@@ -859,6 +876,12 @@ struct drm_bridge {
* @DRM_BRIDGE_OP_HDMI is set.
*/
unsigned int max_bpc;
+
+ struct device *hdmi_codec_dev;
+ int hdmi_codec_max_i2s_channels;
+ unsigned int hdmi_codec_i2s : 1;
+ unsigned int hdmi_codec_spdif : 1;
+ int hdmi_codec_dai_port;
};
static inline struct drm_bridge *
--
2.39.5
