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Mon, 16 Dec 2024 16:40:34 -0800 (PST) From: Dmitry Baryshkov Date: Tue, 17 Dec 2024 02:40:25 +0200 Subject: [PATCH v7 03/10] drm/connector: implement generic HDMI codec helpers Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241217-drm-bridge-hdmi-connector-v7-3-cb9df2b6a515@linaro.org> References: <20241217-drm-bridge-hdmi-connector-v7-0-cb9df2b6a515@linaro.org> In-Reply-To: <20241217-drm-bridge-hdmi-connector-v7-0-cb9df2b6a515@linaro.org> To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jaroslav Kysela , Takashi Iwai , Liam Girdwood , Mark Brown , Phong LE , Inki Dae , Seung-Woo Kim , Kyungmin Park , Krzysztof Kozlowski , Alim Akhtar , Russell King , Chun-Kuang Hu , Philipp Zabel , Matthias Brugger , AngeloGioacchino Del Regno , Sandy Huang , =?utf-8?q?Heiko_St=C3=BCbner?= , Andy Yan , Alain Volmat , Raphael Gallais-Pou , Dave Stevenson , =?utf-8?q?Ma=C3=ADra_Cana?= =?utf-8?q?l?= , Raspberry Pi Kernel Maintenance Cc: Jani Nikula , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-sound@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-rockchip@lists.infradead.org X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=13527; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=2lJsEGwVWJMdg2hXxYFnGcwjvKU3FTtNetX0R5HTLLI=; b=owGbwMvMwMXYbdNlx6SpcZXxtFoSQ3rCiYoUtaXf7Go4+RattEh/n3zmG9+ZmOC6KB6ZuufxP +osXWI6GY1ZGBi5GGTFFFl8ClqmxmxKDvuwY2o9zCBWJpApDFycAjAR9iUcDBMzGHL9bmtcLUyT b9QylK89PXFORtdambqZYrsEw8quHrpzd0KX11q9p7/+8T0/L+Ekxf69wNCLIz/T7rv4p47M01W HErZlTzlTbsh5R0h1i8DTD/vCTy1jd0s6FWe1uG6bi6zRrNlTstT6e3zVc1ffKhe8uaqOa8vLA7 wLrQJ37g5QmhZZxb2c3e2x70L2EzNeXM6eKuAw/dhTn5jsqJwfQX23p3sV7J7Nabl74Z71udKxJ lx1F9PDCg/mT7I/t0vg7BXGTpPPdrLWCjYC/h9cP33m65T1OeKszriy5f9dCTt9p8erfVWj2naI c1lf+JR6bO8tZUc22QUbLj9tk/2hVz8vQ7I+qiTVLPMMAA== X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A Several DRM drivers implement HDMI codec support (despite its name it applies to both HDMI and DisplayPort drivers). Implement generic framework to be used by these drivers. This removes a requirement to implement get_eld() callback and provides default implementation for codec's plug handling. The framework is integrated with the DRM HDMI Connector framework, but can be used by DisplayPort drivers. Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/Makefile | 1 + drivers/gpu/drm/drm_connector.c | 5 + drivers/gpu/drm/drm_connector_hdmi_codec.c | 189 +++++++++++++++++++++++++++++ include/drm/drm_connector.h | 125 +++++++++++++++++++ 4 files changed, 320 insertions(+) diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index 19fb370fbc56772077973c864df71e4b8e0bf99b..46e6dbc355afe4015ff2327ba04211cdc011a0b7 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -42,6 +42,7 @@ drm-y := \ drm_cache.o \ drm_color_mgmt.o \ drm_connector.o \ + drm_connector_hdmi_codec.o \ drm_crtc.o \ drm_displayid.o \ drm_drv.o \ diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index bbdaaf7022b62d84594a29f1b60144920903a99a..4abfbded962bf45b793a2bd5b1b5c4d9f478a1f7 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -33,6 +33,7 @@ #include #include +#include #include #include @@ -280,6 +281,7 @@ static int __drm_connector_init(struct drm_device *dev, mutex_init(&connector->eld_mutex); mutex_init(&connector->edid_override_mutex); mutex_init(&connector->hdmi.infoframes.lock); + mutex_init(&connector->hdmi_codec.lock); connector->edid_blob_ptr = NULL; connector->epoch_counter = 0; connector->tile_blob_ptr = NULL; @@ -632,6 +634,8 @@ void drm_connector_cleanup(struct drm_connector *connector) DRM_CONNECTOR_REGISTERED)) drm_connector_unregister(connector); + platform_device_unregister(connector->hdmi_codec.codec_pdev); + if (connector->privacy_screen) { drm_privacy_screen_put(connector->privacy_screen); connector->privacy_screen = NULL; @@ -670,6 +674,7 @@ void drm_connector_cleanup(struct drm_connector *connector) connector->funcs->atomic_destroy_state(connector, connector->state); + mutex_destroy(&connector->hdmi_codec.lock); mutex_destroy(&connector->hdmi.infoframes.lock); mutex_destroy(&connector->mutex); diff --git a/drivers/gpu/drm/drm_connector_hdmi_codec.c b/drivers/gpu/drm/drm_connector_hdmi_codec.c new file mode 100644 index 0000000000000000000000000000000000000000..a6e2f27c3f7ff9d57cf19c055870001daff4c676 --- /dev/null +++ b/drivers/gpu/drm/drm_connector_hdmi_codec.c @@ -0,0 +1,189 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright (c) 2024 Linaro Ltd + */ + +#include +#include +#include + +#include +#include + +#include + +static int drm_connector_hdmi_codec_audio_startup(struct device *dev, void *data) +{ + struct drm_connector *connector = data; + const struct drm_connector_hdmi_codec_funcs *funcs = + connector->hdmi_codec.funcs; + + if (funcs->audio_startup) + return funcs->audio_startup(connector); + + return 0; +} + +static int drm_connector_hdmi_codec_prepare(struct device *dev, void *data, + struct hdmi_codec_daifmt *fmt, + struct hdmi_codec_params *hparms) +{ + struct drm_connector *connector = data; + const struct drm_connector_hdmi_codec_funcs *funcs = + connector->hdmi_codec.funcs; + + return funcs->prepare(connector, fmt, hparms); +} + +static void drm_connector_hdmi_codec_audio_shutdown(struct device *dev, void *data) +{ + struct drm_connector *connector = data; + const struct drm_connector_hdmi_codec_funcs *funcs = + connector->hdmi_codec.funcs; + + return funcs->audio_shutdown(connector); +} + +static int drm_connector_hdmi_codec_mute_stream(struct device *dev, void *data, + bool enable, int direction) +{ + struct drm_connector *connector = data; + const struct drm_connector_hdmi_codec_funcs *funcs = + connector->hdmi_codec.funcs; + + if (funcs->mute_stream) + return funcs->mute_stream(connector, enable, direction); + + return -ENOTSUPP; +} + +static int drm_connector_hdmi_codec_get_dai_id(struct snd_soc_component *comment, + struct device_node *endpoint, + void *data) +{ + struct drm_connector *connector = data; + struct of_endpoint of_ep; + int ret; + + if (connector->hdmi_codec.dai_port < 0) + return -ENOTSUPP; + + ret = of_graph_parse_endpoint(endpoint, &of_ep); + if (ret < 0) + return ret; + + if (of_ep.port == connector->hdmi_codec.dai_port) + return 0; + + return -EINVAL; +} + +static int drm_connector_hdmi_codec_get_eld(struct device *dev, void *data, + uint8_t *buf, size_t len) +{ + struct drm_connector *connector = data; + + mutex_lock(&connector->eld_mutex); + memcpy(buf, connector->eld, min(sizeof(connector->eld), len)); + mutex_unlock(&connector->eld_mutex); + + return 0; +} + +static int drm_connector_hdmi_codec_hook_plugged_cb(struct device *dev, + void *data, + hdmi_codec_plugged_cb fn, + struct device *codec_dev) +{ + struct drm_connector *connector = data; + + mutex_lock(&connector->hdmi_codec.lock); + + connector->hdmi_codec.plugged_cb = fn; + connector->hdmi_codec.plugged_cb_dev = codec_dev; + + fn(codec_dev, connector->hdmi_codec.last_state); + + mutex_unlock(&connector->hdmi_codec.lock); + + return 0; +} + +void drm_connector_hdmi_codec_plugged_notify(struct drm_connector *connector, + bool plugged) +{ + mutex_lock(&connector->hdmi_codec.lock); + + connector->hdmi_codec.last_state = plugged; + + if (connector->hdmi_codec.plugged_cb && + connector->hdmi_codec.plugged_cb_dev) + connector->hdmi_codec.plugged_cb(connector->hdmi_codec.plugged_cb_dev, + connector->hdmi_codec.last_state); + + mutex_unlock(&connector->hdmi_codec.lock); +} +EXPORT_SYMBOL(drm_connector_hdmi_codec_plugged_notify); + +static const struct hdmi_codec_ops drm_connector_hdmi_codec_ops = { + .audio_startup = drm_connector_hdmi_codec_audio_startup, + .prepare = drm_connector_hdmi_codec_prepare, + .audio_shutdown = drm_connector_hdmi_codec_audio_shutdown, + .mute_stream = drm_connector_hdmi_codec_mute_stream, + .get_eld = drm_connector_hdmi_codec_get_eld, + .get_dai_id = drm_connector_hdmi_codec_get_dai_id, + .hook_plugged_cb = drm_connector_hdmi_codec_hook_plugged_cb, +}; + +/** + * drm_connector_hdmi_audio_init - Initialize HDMI Codec device for the DRM connector + * @connector: A pointer to the connector to allocate codec for + * @hdmi_codec_dev: device to be used as a parent for the HDMI Codec + * @funcs: callbacks for this HDMI Codec + * @max_i2s_playback_channels: maximum number of playback I2S channels + * @spdif_playback: set if HDMI codec has S/PDIF playback port + * @dai_port: sound DAI port, -1 if it is not enabled + * + * Create a HDMI codec device to be used with the specified connector. + * + * Returns: + * Zero on success, error code on failure. + */ +int drm_connector_hdmi_audio_init(struct drm_connector *connector, + struct device *hdmi_codec_dev, + const struct drm_connector_hdmi_codec_funcs *funcs, + unsigned int max_i2s_playback_channels, + bool spdif_playback, + int dai_port) +{ + struct hdmi_codec_pdata codec_pdata = { + .ops = &drm_connector_hdmi_codec_ops, + .max_i2s_channels = max_i2s_playback_channels, + .i2s = !!max_i2s_playback_channels, + .spdif = spdif_playback, + .no_i2s_capture = true, + .no_spdif_capture = true, + .data = connector, + }; + struct platform_device *pdev; + + if (!funcs || + !funcs->prepare || + !funcs->audio_shutdown) + return -EINVAL; + + connector->hdmi_codec.funcs = funcs; + connector->hdmi_codec.dai_port = dai_port; + + pdev = platform_device_register_data(hdmi_codec_dev, + HDMI_CODEC_DRV_NAME, + PLATFORM_DEVID_AUTO, + &codec_pdata, sizeof(codec_pdata)); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + + connector->hdmi_codec.codec_pdev = pdev; + + return 0; +} +EXPORT_SYMBOL(drm_connector_hdmi_audio_init); diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 1e2b25e204cb523d61d30f5409faa059bf2b86eb..536d604b6fb27368c43805a2ecf57fac06b3d472 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -46,6 +46,8 @@ struct drm_property_blob; struct drm_printer; struct drm_privacy_screen; struct edid; +struct hdmi_codec_daifmt; +struct hdmi_codec_params; struct i2c_adapter; enum drm_connector_force { @@ -1141,6 +1143,53 @@ struct drm_connector_state { struct drm_connector_hdmi_state hdmi; }; +struct drm_connector_hdmi_codec_funcs { + /** + * @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 (*audio_startup)(struct drm_connector *connector); + + /** + * @prepare: + * Configures HDMI-encoder for audio stream. Can be called + * multiple times for each setup. Mandatory. + * + * Returns: + * 0 on success, a negative error code otherwise + */ + int (*prepare)(struct drm_connector *connector, + struct hdmi_codec_daifmt *fmt, + struct hdmi_codec_params *hparms); + + /** + * @audio_shutdown: + * + * Shut down the audio stream. Mandatory. + * + * Returns: + * 0 on success, a negative error code otherwise + */ + void (*audio_shutdown)(struct drm_connector *connector); + + /** + * @mute_stream: + * + * Mute/unmute HDMI audio stream. The @mute_stream callback is + * optional. + * + * Returns: + * 0 on success, a negative error code otherwise + */ + int (*mute_stream)(struct drm_connector *connector, + bool enable, int direction); +}; + /** * struct drm_connector_hdmi_funcs - drm_hdmi_connector control functions */ @@ -1660,6 +1709,68 @@ struct drm_cmdline_mode { bool tv_mode_specified; }; +/** + * struct drm_connector_hdmi_codec - DRM gemeric HDMI Codec-related structure + * + * HDMI drivers usually incorporate a HDMI Codec. This structure expresses the + * generic HDMI Codec as used by the DRM HDMI Codec framework. + */ +struct drm_connector_hdmi_codec { + /** + * @funcs: + * + * Implementation of the HDMI codec functionality to be used by the DRM + * HDMI Codec framework. + */ + const struct drm_connector_hdmi_codec_funcs *funcs; + + /** + * @codec_pdev: + * + * Platform device created to hold the HDMI Codec. It will be + * automatically unregistered during drm_connector_cleanup(). + */ + struct platform_device *codec_pdev; + + /** + * @lock: + * + * Mutex to protect @last_state, @plugged_cb and @plugged_cb_dev. + */ + struct mutex lock; + + /** + * @plugged_cb: + * + * Callback to be called when the HDMI sink get plugged to or unplugged + * from this connector. This is assigned by the framework when + * requested by the ASoC code. + */ + void (*plugged_cb)(struct device *dev, bool plugged); + + /** + * @plugged_cb_dev: + * + * The data for @plugged_cb(). It is being provided by the ASoC. + */ + struct device *plugged_cb_dev; + + /** + * @last_state: + * + * Last plugged state recored by the framework. It is used to correctly + * report the state to @plugged_cb(). + */ + bool last_state; + + /** + * @dai_port: + * + * The port in DT that is used for the Codec DAI. + */ + int dai_port; +}; + /* * struct drm_connector_hdmi - DRM Connector HDMI-related structure */ @@ -2121,6 +2232,11 @@ struct drm_connector { * @hdmi: HDMI-related variable and properties. */ struct drm_connector_hdmi hdmi; + + /** + * @hdmi_codec: HDMI codec properties and non-DRM state. + */ + struct drm_connector_hdmi_codec hdmi_codec; }; #define obj_to_connector(x) container_of(x, struct drm_connector, base) @@ -2148,12 +2264,21 @@ int drmm_connector_hdmi_init(struct drm_device *dev, struct i2c_adapter *ddc, unsigned long supported_formats, unsigned int max_bpc); +int drm_connector_hdmi_audio_init(struct drm_connector *connector, + struct device *hdmi_codec_dev, + const struct drm_connector_hdmi_codec_funcs *funcs, + unsigned int max_i2s_playback_channels, + bool spdif_playback, + int sound_dai_port); void drm_connector_attach_edid_property(struct drm_connector *connector); int drm_connector_register(struct drm_connector *connector); void drm_connector_unregister(struct drm_connector *connector); int drm_connector_attach_encoder(struct drm_connector *connector, struct drm_encoder *encoder); +void drm_connector_hdmi_codec_plugged_notify(struct drm_connector *connector, + bool plugged); + void drm_connector_cleanup(struct drm_connector *connector); static inline unsigned int drm_connector_index(const struct drm_connector *connector)