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Thu, 21 Nov 2024 16:47:46 -0800 (PST) From: Dmitry Baryshkov Date: Fri, 22 Nov 2024 02:47:33 +0200 Subject: [PATCH v4 3/7] 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: <20241122-drm-bridge-hdmi-connector-v4-3-b4d69d6e3bd9@linaro.org> References: <20241122-drm-bridge-hdmi-connector-v4-0-b4d69d6e3bd9@linaro.org> In-Reply-To: <20241122-drm-bridge-hdmi-connector-v4-0-b4d69d6e3bd9@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 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=12999; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=m9zfJO4BshYapRasGcJd4L8a7HQu0P+fqRupSDJ+fRk=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBnP9SoviORIVo7TBWsSstKi+38c7+SpUj8oiIQE 9oEECNhQViJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZz/UqAAKCRCLPIo+Aiko 1XTwCACp0JnCB0kVzW01osJCn4CmwoLmqtPHBi6DbWqXGiRIsVW6mxsF3UGofNWR+ZG+U8ye+u+ TxyANB46vZR8DSG9DngHzY78xPC+zvLnnbkI78iRHQzKVdeA4jyVo4pZTO2QMO1m4JrVKHGq+5o OznpDfQTusMKV37P9UkX2sAa9vHDEFSnoSRzeLzd3pGc+DSO2MGDBlcPKf2ZCoQKTiXeTDa4yhz G1TnDvVp1dkUj7MrxxiLigrsmIQl18wfc5kcfJk/txmi9EAtU11aTrMg95Esi3Pt3TGP9dR1u4q AF+igFZD712+/RnQ/xsTAIo4kCRcDBnpztxJm2ZkyOPP4lXt 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 | 10 ++ drivers/gpu/drm/drm_connector_hdmi_codec.c | 186 +++++++++++++++++++++++++++++ drivers/gpu/drm/drm_internal.h | 5 + include/drm/drm_connector.h | 80 +++++++++++++ 5 files changed, 282 insertions(+) diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index 1677c1f335fbb0c6114bdb4cc0b12eb407d84564..afdd9268ca23ac7602e73bbe45f3f9cd090a3afd 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 fc35f47e2849ed6786d6223ac9c69e1c359fc648..1a155a9fb401f687e5a88e72faca1e81d944b6d2 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -279,6 +279,7 @@ static int __drm_connector_init(struct drm_device *dev, mutex_init(&connector->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; @@ -533,6 +534,12 @@ int drmm_connector_hdmi_init(struct drm_device *dev, connector->hdmi.funcs = hdmi_funcs; + if (connector->hdmi_codec.i2s || connector->hdmi_codec.spdif) { + ret = drm_connector_hdmi_codec_init(connector); + if (ret) + return ret; + } + return 0; } EXPORT_SYMBOL(drmm_connector_hdmi_init); @@ -631,6 +638,8 @@ void drm_connector_cleanup(struct drm_connector *connector) DRM_CONNECTOR_REGISTERED)) drm_connector_unregister(connector); + drm_connector_hdmi_codec_cleanup(connector); + if (connector->privacy_screen) { drm_privacy_screen_put(connector->privacy_screen); connector->privacy_screen = NULL; @@ -669,6 +678,7 @@ 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..e362852c186109644e9033eb8eaf63b864166d5a --- /dev/null +++ b/drivers/gpu/drm/drm_connector_hdmi_codec.c @@ -0,0 +1,186 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright (c) 2024 Linaro Ltd + */ + +#include +#include +#include + +#include +#include + +#include + +#include "drm_internal.h" + +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.funcs->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.funcs->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.funcs->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.funcs->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.sound_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.sound_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; + + // FIXME: locking against drm_edid_to_eld ? + memcpy(buf, connector->eld, min(sizeof(connector->eld), len)); + + 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_codec_cleanup - Cleanup the HDMI Codec for the connector + * @connector: A pointer to the connector to cleanup + * + * Cleanup the HDMI codec device created for the specified connector. + * Can be called even if the codec wasn't allocated. + */ +void drm_connector_hdmi_codec_cleanup(struct drm_connector *connector) +{ + platform_device_unregister(connector->hdmi_codec.codec_pdev); +} + +/** + * drm_connector_hdmi_codec_init - Initialize HDMI Codec device for the DRM connector + * @connector: A pointer to the connector to allocate codec for + * + * Create a HDMI codec device to be used with the specified connector. + * + * Returns: + * Zero on success, error code on failure. + */ +int drm_connector_hdmi_codec_init(struct drm_connector *connector) +{ + struct hdmi_codec_pdata codec_pdata = {}; + struct platform_device *pdev; + + if (!connector->hdmi.funcs->codec_funcs->prepare || + !connector->hdmi.funcs->codec_funcs->audio_shutdown || + !connector->hdmi_codec.dev) + return -EINVAL; + + codec_pdata.ops = &drm_connector_hdmi_codec_ops; + codec_pdata.i2s = connector->hdmi_codec.i2s, + codec_pdata.spdif = connector->hdmi_codec.spdif, + codec_pdata.max_i2s_channels = connector->hdmi_codec.max_i2s_channels, + codec_pdata.data = connector; + + pdev = platform_device_register_data(connector->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; +} diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h index b2b6a8e49dda46f1cb3b048ef7b28356dd3aaa4e..8ed58e482fac4662b659276e8bc17690e1fdb9b7 100644 --- a/drivers/gpu/drm/drm_internal.h +++ b/drivers/gpu/drm/drm_internal.h @@ -280,4 +280,9 @@ void drm_framebuffer_print_info(struct drm_printer *p, unsigned int indent, const struct drm_framebuffer *fb); void drm_framebuffer_debugfs_init(struct drm_device *dev); +/* drm_connector_hdmi_codec.c */ + +int drm_connector_hdmi_codec_init(struct drm_connector *connector); +void drm_connector_hdmi_codec_cleanup(struct drm_connector *connector); + #endif /* __DRM_INTERNAL_H__ */ diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index e3fa43291f449d70f3b92a00985336c4f2237bc6..b89f791cfa2be86ce1c5aa124c0f071d7c8a6489 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 +1143,52 @@ 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 */ @@ -1198,6 +1246,14 @@ struct drm_connector_hdmi_funcs { int (*write_infoframe)(struct drm_connector *connector, enum hdmi_infoframe_type type, const u8 *buffer, size_t len); + + /** + * @codec_funcs: + * + * Implementation of the HDMI codec functionality to be used by the DRM + * HDMI Codec framework. + */ + const struct drm_connector_hdmi_codec_funcs *codec_funcs; }; /** @@ -1660,6 +1716,22 @@ struct drm_cmdline_mode { bool tv_mode_specified; }; +struct drm_connector_hdmi_codec { + struct platform_device *codec_pdev; + struct device *dev; + + struct mutex lock; /* protects last_state and plugged_cb */ + void (*plugged_cb)(struct device *dev, bool plugged); + struct device *plugged_cb_dev; + bool last_state; + + int max_i2s_channels; + uint i2s: 1; + uint spdif: 1; + + int sound_dai_port; +}; + /* * struct drm_connector_hdmi - DRM Connector HDMI-related structure */ @@ -2118,6 +2190,11 @@ 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) @@ -2151,6 +2228,9 @@ 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)