diff options
Diffstat (limited to 'drivers/gpu/drm/drm_bridge.c')
| -rw-r--r-- | drivers/gpu/drm/drm_bridge.c | 46 |
1 files changed, 45 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c index 30d66bee0e..e1cfba2ff5 100644 --- a/drivers/gpu/drm/drm_bridge.c +++ b/drivers/gpu/drm/drm_bridge.c @@ -27,8 +27,9 @@ #include <linux/mutex.h> #include <drm/drm_atomic_state_helper.h> -#include <drm/drm_debugfs.h> #include <drm/drm_bridge.h> +#include <drm/drm_debugfs.h> +#include <drm/drm_edid.h> #include <drm/drm_encoder.h> #include <drm/drm_file.h> #include <drm/drm_of.h> @@ -1207,6 +1208,47 @@ int drm_bridge_get_modes(struct drm_bridge *bridge, EXPORT_SYMBOL_GPL(drm_bridge_get_modes); /** + * drm_bridge_edid_read - read the EDID data of the connected display + * @bridge: bridge control structure + * @connector: the connector to read EDID for + * + * If the bridge supports output EDID retrieval, as reported by the + * DRM_BRIDGE_OP_EDID bridge ops flag, call &drm_bridge_funcs.edid_read to get + * the EDID and return it. Otherwise return NULL. + * + * If &drm_bridge_funcs.edid_read is not set, fall back to using + * drm_bridge_get_edid() and wrapping it in struct drm_edid. + * + * RETURNS: + * The retrieved EDID on success, or NULL otherwise. + */ +const struct drm_edid *drm_bridge_edid_read(struct drm_bridge *bridge, + struct drm_connector *connector) +{ + if (!(bridge->ops & DRM_BRIDGE_OP_EDID)) + return NULL; + + /* Transitional: Fall back to ->get_edid. */ + if (!bridge->funcs->edid_read) { + const struct drm_edid *drm_edid; + struct edid *edid; + + edid = drm_bridge_get_edid(bridge, connector); + if (!edid) + return NULL; + + drm_edid = drm_edid_alloc(edid, (edid->extensions + 1) * EDID_LENGTH); + + kfree(edid); + + return drm_edid; + } + + return bridge->funcs->edid_read(bridge, connector); +} +EXPORT_SYMBOL_GPL(drm_bridge_edid_read); + +/** * drm_bridge_get_edid - get the EDID data of the connected display * @bridge: bridge control structure * @connector: the connector to read EDID for @@ -1215,6 +1257,8 @@ EXPORT_SYMBOL_GPL(drm_bridge_get_modes); * DRM_BRIDGE_OP_EDID bridge ops flag, call &drm_bridge_funcs.get_edid to * get the EDID and return it. Otherwise return NULL. * + * Deprecated. Prefer using drm_bridge_edid_read(). + * * RETURNS: * The retrieved EDID on success, or NULL otherwise. */ |