diff options
Diffstat (limited to 'include/drm/drm_bridge.h')
| -rw-r--r-- | include/drm/drm_bridge.h | 194 |
1 files changed, 176 insertions, 18 deletions
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h index e39da5807ba7..496dbbd2ad7e 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; /** @@ -107,7 +109,7 @@ struct drm_bridge_funcs { * Since this function is both called from the check phase of an atomic * commit, and the mode validation in the probe paths it is not allowed * to look at anything else but the passed-in mode, and validate it - * against configuration-invariant hardward constraints. Any further + * against configuration-invariant hardware constraints. Any further * limits which depend upon the configuration can only be checked in * @mode_fixup. * @@ -541,7 +543,7 @@ struct drm_bridge_funcs { * The @get_modes callback is mostly intended to support non-probeable * displays such as many fixed panels. Bridges that support reading * EDID shall leave @get_modes unimplemented and implement the - * &drm_bridge_funcs->get_edid callback instead. + * &drm_bridge_funcs->edid_read callback instead. * * This callback is optional. Bridges that implement it shall set the * DRM_BRIDGE_OP_MODES flag in their &drm_bridge->ops. @@ -558,11 +560,11 @@ struct drm_bridge_funcs { struct drm_connector *connector); /** - * @get_edid: + * @edid_read: * - * Read and parse the EDID data of the connected display. + * Read the EDID data of the connected display. * - * The @get_edid callback is the preferred way of reporting mode + * The @edid_read callback is the preferred way of reporting mode * information for a display connected to the bridge output. Bridges * that support reading EDID shall implement this callback and leave * the @get_modes callback unimplemented. @@ -575,17 +577,18 @@ struct drm_bridge_funcs { * DRM_BRIDGE_OP_EDID flag in their &drm_bridge->ops. * * The connector parameter shall be used for the sole purpose of EDID - * retrieval and parsing, and shall not be stored internally by bridge - * drivers for future usage. + * retrieval, and shall not be stored internally by bridge drivers for + * future usage. * * RETURNS: * - * An edid structure newly allocated with kmalloc() (or similar) on - * success, or NULL otherwise. The caller is responsible for freeing - * the returned edid structure with kfree(). + * An edid structure newly allocated with drm_edid_alloc() or returned + * from drm_edid_read() family of functions on success, or NULL + * otherwise. The caller is responsible for freeing the returned edid + * structure with drm_edid_free(). */ - struct edid *(*get_edid)(struct drm_bridge *bridge, - struct drm_connector *connector); + const struct drm_edid *(*edid_read)(struct drm_bridge *bridge, + struct drm_connector *connector); /** * @hpd_notify: @@ -630,6 +633,103 @@ struct drm_bridge_funcs { void (*hpd_disable)(struct drm_bridge *bridge); /** + * @hdmi_tmds_char_rate_valid: + * + * Check whether a particular TMDS character rate is supported by the + * driver. + * + * This callback is optional and should only be implemented by the + * bridges that take part in the HDMI connector implementation. Bridges + * that implement it shall set the DRM_BRIDGE_OP_HDMI flag in their + * &drm_bridge->ops. + * + * Returns: + * + * Either &drm_mode_status.MODE_OK or one of the failure reasons + * in &enum drm_mode_status. + */ + enum drm_mode_status + (*hdmi_tmds_char_rate_valid)(const struct drm_bridge *bridge, + const struct drm_display_mode *mode, + unsigned long long tmds_rate); + + /** + * @hdmi_clear_infoframe: + * + * This callback clears the infoframes in the hardware during commit. + * It will be called multiple times, once for every disabled infoframe + * type. + * + * This callback is optional but it must be implemented by bridges that + * set the DRM_BRIDGE_OP_HDMI flag in their &drm_bridge->ops. + */ + int (*hdmi_clear_infoframe)(struct drm_bridge *bridge, + enum hdmi_infoframe_type type); + /** + * @hdmi_write_infoframe: + * + * Program the infoframe into the hardware. It will be called multiple + * times, once for every updated infoframe type. + * + * This callback is optional but it must be implemented by bridges that + * set the DRM_BRIDGE_OP_HDMI flag in their &drm_bridge->ops. + */ + int (*hdmi_write_infoframe)(struct drm_bridge *bridge, + 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); + + /** + * @hdmi_audio_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: * * Allows bridges to create bridge-specific debugfs files. @@ -686,7 +786,7 @@ enum drm_bridge_ops { /** * @DRM_BRIDGE_OP_EDID: The bridge can retrieve the EDID of the display * connected to its output. Bridges that set this flag shall implement - * the &drm_bridge_funcs->get_edid callback. + * the &drm_bridge_funcs->edid_read callback. */ DRM_BRIDGE_OP_EDID = BIT(1), /** @@ -704,6 +804,16 @@ enum drm_bridge_ops { * this flag shall implement the &drm_bridge_funcs->get_modes callback. */ DRM_BRIDGE_OP_MODES = BIT(3), + /** + * @DRM_BRIDGE_OP_HDMI: The bridge provides HDMI connector operations, + * including infoframes support. Bridges that set this flag must + * implement the &drm_bridge_funcs->write_infoframe callback. + * + * Note: currently there can be at most one bridge in a chain that sets + * this bit. This is to simplify corresponding glue code in connector + * drivers. + */ + DRM_BRIDGE_OP_HDMI = BIT(4), }; /** @@ -746,6 +856,11 @@ struct drm_bridge { */ bool interlace_allowed; /** + * @ycbcr_420_allowed: Indicate that the bridge can handle YCbCr 420 + * output. + */ + bool ycbcr_420_allowed; + /** * @pre_enable_prev_first: The bridge requires that the prev * bridge @pre_enable function is called before its @pre_enable, * and conversely for post_disable. This is most frequently a @@ -772,6 +887,52 @@ struct drm_bridge { * @hpd_cb. */ void *hpd_data; + + /** + * @vendor: Vendor of the product to be used for the SPD InfoFrame + * generation. This is required if @DRM_BRIDGE_OP_HDMI is set. + */ + const char *vendor; + + /** + * @product: Name of the product to be used for the SPD InfoFrame + * generation. This is required if @DRM_BRIDGE_OP_HDMI is set. + */ + const char *product; + + /** + * @supported_formats: Bitmask of @hdmi_colorspace listing supported + * output formats. This is only relevant if @DRM_BRIDGE_OP_HDMI is set. + */ + unsigned int supported_formats; + + /** + * @max_bpc: Maximum bits per char the HDMI bridge supports. Allowed + * values are 8, 10 and 12. This is only relevant if + * @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 * @@ -854,9 +1015,6 @@ drm_bridge_chain_get_first_bridge(struct drm_encoder *encoder) #define drm_for_each_bridge_in_chain(encoder, bridge) \ list_for_each_entry(bridge, &(encoder)->bridge_chain, chain_node) -bool drm_bridge_chain_mode_fixup(struct drm_bridge *bridge, - const struct drm_display_mode *mode, - struct drm_display_mode *adjusted_mode); enum drm_mode_status drm_bridge_chain_mode_valid(struct drm_bridge *bridge, const struct drm_display_info *info, @@ -888,8 +1046,8 @@ drm_atomic_helper_bridge_propagate_bus_fmt(struct drm_bridge *bridge, enum drm_connector_status drm_bridge_detect(struct drm_bridge *bridge); int drm_bridge_get_modes(struct drm_bridge *bridge, struct drm_connector *connector); -struct edid *drm_bridge_get_edid(struct drm_bridge *bridge, - struct drm_connector *connector); +const struct drm_edid *drm_bridge_edid_read(struct drm_bridge *bridge, + struct drm_connector *connector); void drm_bridge_hpd_enable(struct drm_bridge *bridge, void (*cb)(void *data, enum drm_connector_status status), |