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drm/bridge: connector: add support for HDMI codec framework

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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.

Reviewed-by: Maxime Ripard <mripard@kernel.org>
Tested-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241224-drm-bridge-hdmi-connector-v10-4-dc89577cd438@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
This commit is contained in:
Dmitry Baryshkov 2024-12-24 03:47:56 +02:00
parent baf616647f
commit 0beba3f9d3
3 changed files with 170 additions and 4 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/gpu/drm/display/Kconfig
View file

@ -15,6 +15,7 @@ if DRM_DISPLAY_HELPER
config DRM_BRIDGE_CONNECTOR
bool
select DRM_DISPLAY_HDMI_AUDIO_HELPER
select DRM_DISPLAY_HDMI_STATE_HELPER
help
DRM connector implementation terminating DRM bridge chains.

95
drivers/gpu/drm/display/drm_bridge_connector.c
View file

@ -18,6 +18,7 @@
#include <drm/drm_managed.h>
#include <drm/drm_modeset_helper_vtables.h>
#include <drm/drm_probe_helper.h>
#include <drm/display/drm_hdmi_audio_helper.h>
#include <drm/display/drm_hdmi_helper.h>
#include <drm/display/drm_hdmi_state_helper.h>
@ -387,6 +388,75 @@ static const struct drm_connector_hdmi_funcs drm_bridge_connector_hdmi_funcs = {
.write_infoframe = drm_bridge_connector_write_infoframe,
};
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_audio_startup)
return 0;
return bridge->funcs->hdmi_audio_startup(connector, bridge);
}
static int drm_bridge_connector_audio_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_audio_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_audio_shutdown(connector, bridge);
}
static int drm_bridge_connector_audio_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_audio_mute_stream)
return bridge->funcs->hdmi_audio_mute_stream(connector, bridge,
enable, direction);
else
return -ENOTSUPP;
}
static const struct drm_connector_hdmi_audio_funcs drm_bridge_connector_hdmi_audio_funcs = {
.startup = drm_bridge_connector_audio_startup,
.prepare = drm_bridge_connector_audio_prepare,
.shutdown = drm_bridge_connector_audio_shutdown,
.mute_stream = drm_bridge_connector_audio_mute_stream,
};
/* -----------------------------------------------------------------------------
* Bridge Connector Initialisation
*/
@ -486,7 +556,9 @@ 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;
ret = drmm_connector_hdmi_init(drm, connector,
bridge_connector->bridge_hdmi->vendor,
bridge_connector->bridge_hdmi->product,
@ -495,12 +567,31 @@ struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
connector_type, ddc,
supported_formats,
max_bpc);
else
if (ret)
return ERR_PTR(ret);
if (bridge->hdmi_audio_max_i2s_playback_channels ||
bridge->hdmi_audio_spdif_playback) {
if (!bridge->funcs->hdmi_audio_prepare ||
!bridge->funcs->hdmi_audio_shutdown)
return ERR_PTR(-EINVAL);
ret = drm_connector_hdmi_audio_init(connector,
bridge->hdmi_audio_dev,
&drm_bridge_connector_hdmi_audio_funcs,
bridge->hdmi_audio_max_i2s_playback_channels,
bridge->hdmi_audio_spdif_playback,
bridge->hdmi_audio_dai_port);
if (ret)
return ERR_PTR(ret);
}
} else {
ret = drmm_connector_init(drm, connector,
&drm_bridge_connector_funcs,
connector_type, ddc);
if (ret)
return ERR_PTR(ret);
}
drm_connector_helper_add(connector, &drm_bridge_connector_helper_funcs);

74
include/drm/drm_bridge.h
View file

@ -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 +678,57 @@ struct drm_bridge_funcs {
enum hdmi_infoframe_type type,
const u8 *buffer, size_t len);
/**
* @hdmi_audio_startup:
*
* Called when ASoC starts an audio stream setup. The
* @hdmi_audio_startup() is optional.
*
* Returns:
* 0 on success, a negative error code otherwise
*/
int (*hdmi_audio_startup)(struct drm_connector *connector,
struct drm_bridge *bridge);
/**
* @prepare:
* Configures HDMI-encoder for audio stream. Can be called multiple
* times for each setup. Mandatory if HDMI audio is enabled in the
* bridge's configuration.
*
* Returns:
* 0 on success, a negative error code otherwise
*/
int (*hdmi_audio_prepare)(struct drm_connector *connector,
struct drm_bridge *bridge,
struct hdmi_codec_daifmt *fmt,
struct hdmi_codec_params *hparms);
/**
* @hdmi_audio_shutdown:
*
* Shut down the audio stream. Mandatory if HDMI audio is enabled in
* the bridge's configuration.
*
* Returns:
* 0 on success, a negative error code otherwise
*/
void (*hdmi_audio_shutdown)(struct drm_connector *connector,
struct drm_bridge *bridge);
/**
* @hdmi_audio_mute_stream:
*
* Mute/unmute HDMI audio stream. The @hdmi_audio_mute_stream callback
* is optional.
*
* Returns:
* 0 on success, a negative error code otherwise
*/
int (*hdmi_audio_mute_stream)(struct drm_connector *connector,
struct drm_bridge *bridge,
bool enable, int direction);
/**
* @debugfs_init:
*
@ -859,6 +912,27 @@ struct drm_bridge {
* @DRM_BRIDGE_OP_HDMI is set.
*/
unsigned int max_bpc;
/**
* @hdmi_audio_dev: device to be used as a parent for the HDMI Codec
*/
struct device *hdmi_audio_dev;
/**
* @hdmi_audio_max_i2s_playback_channels: maximum number of playback
* I2S channels for the HDMI codec
*/
int hdmi_audio_max_i2s_playback_channels;
/**
* @hdmi_audio_spdif_playback: set if HDMI codec has S/PDIF playback port
*/
unsigned int hdmi_audio_spdif_playback : 1;
/**
* @hdmi_audio_dai_port: sound DAI port, -1 if it is not enabled
*/
int hdmi_audio_dai_port;
};
static inline struct drm_bridge *