1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef __DRM_OF_H__ 3#define __DRM_OF_H__ 4 5#include <linux/of_graph.h> 6#if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_DRM_PANEL_BRIDGE) 7#include <drm/drm_bridge.h> 8#endif 9 10struct component_master_ops; 11struct component_match; 12struct device; 13struct drm_device; 14struct drm_encoder; 15struct drm_panel; 16struct drm_bridge; 17struct device_node; 18 19/** 20 * enum drm_lvds_dual_link_pixels - Pixel order of an LVDS dual-link connection 21 * @DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS: Even pixels are expected to be generated 22 * from the first port, odd pixels from the second port 23 * @DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS: Odd pixels are expected to be generated 24 * from the first port, even pixels from the second port 25 */ 26enum drm_lvds_dual_link_pixels { 27 DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS = 0, 28 DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS = 1, 29}; 30 31#ifdef CONFIG_OF 32uint32_t drm_of_crtc_port_mask(struct drm_device *dev, 33 struct device_node *port); 34uint32_t drm_of_find_possible_crtcs(struct drm_device *dev, 35 struct device_node *port); 36void drm_of_component_match_add(struct device *master, 37 struct component_match **matchptr, 38 int (*compare)(struct device *, void *), 39 struct device_node *node); 40int drm_of_component_probe(struct device *dev, 41 int (*compare_of)(struct device *, void *), 42 const struct component_master_ops *m_ops); 43int drm_of_encoder_active_endpoint(struct device_node *node, 44 struct drm_encoder *encoder, 45 struct of_endpoint *endpoint); 46int drm_of_find_panel_or_bridge(const struct device_node *np, 47 int port, int endpoint, 48 struct drm_panel **panel, 49 struct drm_bridge **bridge); 50int drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1, 51 const struct device_node *port2); 52#else 53static inline uint32_t drm_of_crtc_port_mask(struct drm_device *dev, 54 struct device_node *port) 55{ 56 return 0; 57} 58 59static inline uint32_t drm_of_find_possible_crtcs(struct drm_device *dev, 60 struct device_node *port) 61{ 62 return 0; 63} 64 65static inline void 66drm_of_component_match_add(struct device *master, 67 struct component_match **matchptr, 68 int (*compare)(struct device *, void *), 69 struct device_node *node) 70{ 71} 72 73static inline int 74drm_of_component_probe(struct device *dev, 75 int (*compare_of)(struct device *, void *), 76 const struct component_master_ops *m_ops) 77{ 78 return -EINVAL; 79} 80 81static inline int drm_of_encoder_active_endpoint(struct device_node *node, 82 struct drm_encoder *encoder, 83 struct of_endpoint *endpoint) 84{ 85 return -EINVAL; 86} 87static inline int drm_of_find_panel_or_bridge(const struct device_node *np, 88 int port, int endpoint, 89 struct drm_panel **panel, 90 struct drm_bridge **bridge) 91{ 92 return -EINVAL; 93} 94 95static inline int 96drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1, 97 const struct device_node *port2) 98{ 99 return -EINVAL; 100} 101#endif 102 103/* 104 * drm_of_panel_bridge_remove - remove panel bridge 105 * @np: device tree node containing panel bridge output ports 106 * 107 * Remove the panel bridge of a given DT node's port and endpoint number 108 * 109 * Returns zero if successful, or one of the standard error codes if it fails. 110 */ 111static inline int drm_of_panel_bridge_remove(const struct device_node *np, 112 int port, int endpoint) 113{ 114#if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_DRM_PANEL_BRIDGE) 115 struct drm_bridge *bridge; 116 struct device_node *remote; 117 118 remote = of_graph_get_remote_node(np, port, endpoint); 119 if (!remote) 120 return -ENODEV; 121 122 bridge = of_drm_find_bridge(remote); 123 drm_panel_bridge_remove(bridge); 124 125 return 0; 126#else 127 return -EINVAL; 128#endif 129} 130 131static inline int drm_of_encoder_active_endpoint_id(struct device_node *node, 132 struct drm_encoder *encoder) 133{ 134 struct of_endpoint endpoint; 135 int ret = drm_of_encoder_active_endpoint(node, encoder, 136 &endpoint); 137 138 return ret ?: endpoint.id; 139} 140 141static inline int drm_of_encoder_active_port_id(struct device_node *node, 142 struct drm_encoder *encoder) 143{ 144 struct of_endpoint endpoint; 145 int ret = drm_of_encoder_active_endpoint(node, encoder, 146 &endpoint); 147 148 return ret ?: endpoint.port; 149} 150 151#endif /* __DRM_OF_H__ */ 152