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Message-Id: <20241101-drm-bridge-hdmi-connector-v2-4-739ef9addf9e@linaro.org>
Date: Fri, 01 Nov 2024 12:19:05 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Andrzej Hajda <andrzej.hajda@...el.com>,
Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>,
Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
Phong LE <ple@...libre.com>, Inki Dae <inki.dae@...sung.com>,
Seung-Woo Kim <sw0312.kim@...sung.com>,
Kyungmin Park <kyungmin.park@...sung.com>,
Krzysztof Kozlowski <krzk@...nel.org>,
Alim Akhtar <alim.akhtar@...sung.com>, Russell King <linux@...linux.org.uk>,
Chun-Kuang Hu <chunkuang.hu@...nel.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
Sandy Huang <hjc@...k-chips.com>,
Heiko Stübner <heiko@...ech.de>,
Andy Yan <andy.yan@...k-chips.com>, Alain Volmat <alain.volmat@...s.st.com>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
linux-sound@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-samsung-soc@...r.kernel.org, linux-mediatek@...ts.infradead.org,
linux-rockchip@...ts.infradead.org
Subject: [PATCH RFC v2 4/7] drm/bridge: connector: add support for HDMI
codec framework
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.baryshkov@...aro.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
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