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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef __DRM_OF_H__3#define __DRM_OF_H__4 5#include <linux/err.h>6#include <linux/of_graph.h>7#if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_DRM_PANEL_BRIDGE)8#include <drm/drm_bridge.h>9#endif10 11struct component_master_ops;12struct component_match;13struct device;14struct drm_device;15struct drm_encoder;16struct drm_panel;17struct drm_bridge;18struct device_node;19struct mipi_dsi_device_info;20struct mipi_dsi_host;21 22/**23 * enum drm_lvds_dual_link_pixels - Pixel order of an LVDS dual-link connection24 * @DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS: Even pixels are expected to be generated25 * from the first port, odd pixels from the second port26 * @DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS: Odd pixels are expected to be generated27 * from the first port, even pixels from the second port28 */29enum drm_lvds_dual_link_pixels {30 DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS = 0,31 DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS = 1,32};33 34#ifdef CONFIG_OF35uint32_t drm_of_crtc_port_mask(struct drm_device *dev,36 struct device_node *port);37uint32_t drm_of_find_possible_crtcs(struct drm_device *dev,38 struct device_node *port);39void drm_of_component_match_add(struct device *master,40 struct component_match **matchptr,41 int (*compare)(struct device *, void *),42 struct device_node *node);43int drm_of_component_probe(struct device *dev,44 int (*compare_of)(struct device *, void *),45 const struct component_master_ops *m_ops);46int drm_of_encoder_active_endpoint(struct device_node *node,47 struct drm_encoder *encoder,48 struct of_endpoint *endpoint);49int drm_of_find_panel_or_bridge(const struct device_node *np,50 int port, int endpoint,51 struct drm_panel **panel,52 struct drm_bridge **bridge);53int drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1,54 const struct device_node *port2);55int drm_of_lvds_get_data_mapping(const struct device_node *port);56int drm_of_get_data_lanes_count(const struct device_node *endpoint,57 const unsigned int min, const unsigned int max);58int drm_of_get_data_lanes_count_ep(const struct device_node *port,59 int port_reg, int reg,60 const unsigned int min,61 const unsigned int max);62#else63static inline uint32_t drm_of_crtc_port_mask(struct drm_device *dev,64 struct device_node *port)65{66 return 0;67}68 69static inline uint32_t drm_of_find_possible_crtcs(struct drm_device *dev,70 struct device_node *port)71{72 return 0;73}74 75static inline void76drm_of_component_match_add(struct device *master,77 struct component_match **matchptr,78 int (*compare)(struct device *, void *),79 struct device_node *node)80{81}82 83static inline int84drm_of_component_probe(struct device *dev,85 int (*compare_of)(struct device *, void *),86 const struct component_master_ops *m_ops)87{88 return -EINVAL;89}90 91static inline int drm_of_encoder_active_endpoint(struct device_node *node,92 struct drm_encoder *encoder,93 struct of_endpoint *endpoint)94{95 return -EINVAL;96}97static inline int drm_of_find_panel_or_bridge(const struct device_node *np,98 int port, int endpoint,99 struct drm_panel **panel,100 struct drm_bridge **bridge)101{102 return -EINVAL;103}104 105static inline int106drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1,107 const struct device_node *port2)108{109 return -EINVAL;110}111 112static inline int113drm_of_lvds_get_data_mapping(const struct device_node *port)114{115 return -EINVAL;116}117 118static inline int119drm_of_get_data_lanes_count(const struct device_node *endpoint,120 const unsigned int min, const unsigned int max)121{122 return -EINVAL;123}124 125static inline int126drm_of_get_data_lanes_count_ep(const struct device_node *port,127 int port_reg, int reg,128 const unsigned int min,129 const unsigned int max)130{131 return -EINVAL;132}133#endif134 135#if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_DRM_MIPI_DSI)136struct mipi_dsi_host *drm_of_get_dsi_bus(struct device *dev);137#else138static inline struct139mipi_dsi_host *drm_of_get_dsi_bus(struct device *dev)140{141 return ERR_PTR(-EINVAL);142}143#endif /* CONFIG_OF && CONFIG_DRM_MIPI_DSI */144 145/*146 * drm_of_panel_bridge_remove - remove panel bridge147 * @np: device tree node containing panel bridge output ports148 *149 * Remove the panel bridge of a given DT node's port and endpoint number150 *151 * Returns zero if successful, or one of the standard error codes if it fails.152 */153static inline int drm_of_panel_bridge_remove(const struct device_node *np,154 int port, int endpoint)155{156#if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_DRM_PANEL_BRIDGE)157 struct drm_bridge *bridge;158 struct device_node *remote;159 160 remote = of_graph_get_remote_node(np, port, endpoint);161 if (!remote)162 return -ENODEV;163 164 bridge = of_drm_find_bridge(remote);165 drm_panel_bridge_remove(bridge);166 167 return 0;168#else169 return -EINVAL;170#endif171}172 173static inline int drm_of_encoder_active_endpoint_id(struct device_node *node,174 struct drm_encoder *encoder)175{176 struct of_endpoint endpoint;177 int ret = drm_of_encoder_active_endpoint(node, encoder,178 &endpoint);179 180 return ret ?: endpoint.id;181}182 183static inline int drm_of_encoder_active_port_id(struct device_node *node,184 struct drm_encoder *encoder)185{186 struct of_endpoint endpoint;187 int ret = drm_of_encoder_active_endpoint(node, encoder,188 &endpoint);189 190 return ret ?: endpoint.port;191}192 193#endif /* __DRM_OF_H__ */194