diff options
Diffstat (limited to 'drivers/gpu/drm/drm_connector.c')
| -rw-r--r-- | drivers/gpu/drm/drm_connector.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index 4d2df7f64dc5..3d73a981004c 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -278,6 +278,7 @@ static int __drm_connector_init(struct drm_device *dev, INIT_LIST_HEAD(&connector->modes); mutex_init(&connector->mutex); mutex_init(&connector->edid_override_mutex); + mutex_init(&connector->hdmi.infoframes.lock); connector->edid_blob_ptr = NULL; connector->epoch_counter = 0; connector->tile_blob_ptr = NULL; @@ -453,6 +454,86 @@ int drmm_connector_init(struct drm_device *dev, EXPORT_SYMBOL(drmm_connector_init); /** + * drmm_connector_hdmi_init - Init a preallocated HDMI connector + * @dev: DRM device + * @connector: A pointer to the HDMI connector to init + * @vendor: HDMI Controller Vendor name + * @product: HDMI Controller Product name + * @funcs: callbacks for this connector + * @hdmi_funcs: HDMI-related callbacks for this connector + * @connector_type: user visible type of the connector + * @ddc: optional pointer to the associated ddc adapter + * @supported_formats: Bitmask of @hdmi_colorspace listing supported output formats + * @max_bpc: Maximum bits per char the HDMI connector supports + * + * Initialises a preallocated HDMI connector. Connectors can be + * subclassed as part of driver connector objects. + * + * Cleanup is automatically handled with a call to + * drm_connector_cleanup() in a DRM-managed action. + * + * The connector structure should be allocated with drmm_kzalloc(). + * + * Returns: + * Zero on success, error code on failure. + */ +int drmm_connector_hdmi_init(struct drm_device *dev, + struct drm_connector *connector, + const char *vendor, const char *product, + const struct drm_connector_funcs *funcs, + const struct drm_connector_hdmi_funcs *hdmi_funcs, + int connector_type, + struct i2c_adapter *ddc, + unsigned long supported_formats, + unsigned int max_bpc) +{ + int ret; + + if (!vendor || !product) + return -EINVAL; + + if ((strlen(vendor) > DRM_CONNECTOR_HDMI_VENDOR_LEN) || + (strlen(product) > DRM_CONNECTOR_HDMI_PRODUCT_LEN)) + return -EINVAL; + + if (!(connector_type == DRM_MODE_CONNECTOR_HDMIA || + connector_type == DRM_MODE_CONNECTOR_HDMIB)) + return -EINVAL; + + if (!supported_formats || !(supported_formats & BIT(HDMI_COLORSPACE_RGB))) + return -EINVAL; + + if (!(max_bpc == 8 || max_bpc == 10 || max_bpc == 12)) + return -EINVAL; + + ret = drmm_connector_init(dev, connector, funcs, connector_type, ddc); + if (ret) + return ret; + + connector->hdmi.supported_formats = supported_formats; + strtomem_pad(connector->hdmi.vendor, vendor, 0); + strtomem_pad(connector->hdmi.product, product, 0); + + /* + * drm_connector_attach_max_bpc_property() requires the + * connector to have a state. + */ + if (connector->funcs->reset) + connector->funcs->reset(connector); + + drm_connector_attach_max_bpc_property(connector, 8, max_bpc); + connector->max_bpc = max_bpc; + + if (max_bpc > 8) + drm_connector_attach_hdr_output_metadata_property(connector); + + connector->hdmi.funcs = hdmi_funcs; + + return 0; +} +EXPORT_SYMBOL(drmm_connector_hdmi_init); + +/** * drm_connector_attach_edid_property - attach edid property. * @connector: the connector * @@ -584,6 +665,7 @@ void drm_connector_cleanup(struct drm_connector *connector) connector->funcs->atomic_destroy_state(connector, connector->state); + mutex_destroy(&connector->hdmi.infoframes.lock); mutex_destroy(&connector->mutex); memset(connector, 0, sizeof(*connector)); @@ -1144,6 +1226,53 @@ static const u32 dp_colorspaces = BIT(DRM_MODE_COLORIMETRY_BT2020_CYCC) | BIT(DRM_MODE_COLORIMETRY_BT2020_YCC); +static const struct drm_prop_enum_list broadcast_rgb_names[] = { + { DRM_HDMI_BROADCAST_RGB_AUTO, "Automatic" }, + { DRM_HDMI_BROADCAST_RGB_FULL, "Full" }, + { DRM_HDMI_BROADCAST_RGB_LIMITED, "Limited 16:235" }, +}; + +/* + * drm_hdmi_connector_get_broadcast_rgb_name - Return a string for HDMI connector RGB broadcast selection + * @broadcast_rgb: Broadcast RGB selection to compute name of + * + * Returns: the name of the Broadcast RGB selection, or NULL if the type + * is not valid. + */ +const char * +drm_hdmi_connector_get_broadcast_rgb_name(enum drm_hdmi_broadcast_rgb broadcast_rgb) +{ + if (broadcast_rgb >= ARRAY_SIZE(broadcast_rgb_names)) + return NULL; + + return broadcast_rgb_names[broadcast_rgb].name; +} +EXPORT_SYMBOL(drm_hdmi_connector_get_broadcast_rgb_name); + +static const char * const output_format_str[] = { + [HDMI_COLORSPACE_RGB] = "RGB", + [HDMI_COLORSPACE_YUV420] = "YUV 4:2:0", + [HDMI_COLORSPACE_YUV422] = "YUV 4:2:2", + [HDMI_COLORSPACE_YUV444] = "YUV 4:4:4", +}; + +/* + * drm_hdmi_connector_get_output_format_name() - Return a string for HDMI connector output format + * @fmt: Output format to compute name of + * + * Returns: the name of the output format, or NULL if the type is not + * valid. + */ +const char * +drm_hdmi_connector_get_output_format_name(enum hdmi_colorspace fmt) +{ + if (fmt >= ARRAY_SIZE(output_format_str)) + return NULL; + + return output_format_str[fmt]; +} +EXPORT_SYMBOL(drm_hdmi_connector_get_output_format_name); + /** * DOC: standard connector properties * @@ -1616,6 +1745,38 @@ EXPORT_SYMBOL(drm_connector_attach_dp_subconnector_property); /** * DOC: HDMI connector properties * + * Broadcast RGB (HDMI specific) + * Indicates the Quantization Range (Full vs Limited) used. The color + * processing pipeline will be adjusted to match the value of the + * property, and the Infoframes will be generated and sent accordingly. + * + * This property is only relevant if the HDMI output format is RGB. If + * it's one of the YCbCr variant, it will be ignored. + * + * The CRTC attached to the connector must be configured by user-space to + * always produce full-range pixels. + * + * The value of this property can be one of the following: + * + * Automatic: + * The quantization range is selected automatically based on the + * mode according to the HDMI specifications (HDMI 1.4b - Section + * 6.6 - Video Quantization Ranges). + * + * Full: + * Full quantization range is forced. + * + * Limited 16:235: + * Limited quantization range is forced. Unlike the name suggests, + * this works for any number of bits-per-component. + * + * Property values other than Automatic can result in colors being off (if + * limited is selected but the display expects full), or a black screen + * (if full is selected but the display expects limited). + * + * Drivers can set up this property by calling + * drm_connector_attach_broadcast_rgb_property(). + * * content type (HDMI specific): * Indicates content type setting to be used in HDMI infoframes to indicate * content type for the external device, so that it adjusts its display @@ -2479,6 +2640,39 @@ int drm_connector_attach_hdr_output_metadata_property(struct drm_connector *conn EXPORT_SYMBOL(drm_connector_attach_hdr_output_metadata_property); /** + * drm_connector_attach_broadcast_rgb_property - attach "Broadcast RGB" property + * @connector: connector to attach the property on. + * + * This is used to add support for forcing the RGB range on a connector + * + * Returns: + * Zero on success, negative errno on failure. + */ +int drm_connector_attach_broadcast_rgb_property(struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + struct drm_property *prop; + + prop = connector->broadcast_rgb_property; + if (!prop) { + prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM, + "Broadcast RGB", + broadcast_rgb_names, + ARRAY_SIZE(broadcast_rgb_names)); + if (!prop) + return -EINVAL; + + connector->broadcast_rgb_property = prop; + } + + drm_object_attach_property(&connector->base, prop, + DRM_HDMI_BROADCAST_RGB_AUTO); + + return 0; +} +EXPORT_SYMBOL(drm_connector_attach_broadcast_rgb_property); + +/** * drm_connector_attach_colorspace_property - attach "Colorspace" property * @connector: connector to attach the property on. * |