/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __DRM_OF_H__
#define __DRM_OF_H__

#include <linux/err.h>
#include <linux/of_graph.h>
#if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_DRM_PANEL_BRIDGE)
#include <linux/of.h>
#include <drm/drm_bridge.h>
#endif

struct component_master_ops;
struct component_match;
struct device;
struct drm_device;
struct drm_encoder;
struct drm_panel;
struct drm_bridge;
struct device_node;
struct mipi_dsi_device_info;
struct mipi_dsi_host;

/**
 * enum drm_lvds_dual_link_pixels - Pixel order of an LVDS dual-link connection
 * @DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS: Even pixels are expected to be generated
 *    from the first port, odd pixels from the second port
 * @DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS: Odd pixels are expected to be generated
 *    from the first port, even pixels from the second port
 */
enum drm_lvds_dual_link_pixels {
        DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS = 0,
        DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS = 1,
};

#ifdef CONFIG_OF
uint32_t drm_of_crtc_port_mask(struct drm_device *dev,
                            struct device_node *port);
uint32_t drm_of_find_possible_crtcs(struct drm_device *dev,
                                    struct device_node *port);
void drm_of_component_match_add(struct device *master,
                                struct component_match **matchptr,
                                int (*compare)(struct device *, void *),
                                struct device_node *node);
int drm_of_component_probe(struct device *dev,
                           int (*compare_of)(struct device *, void *),
                           const struct component_master_ops *m_ops);
int drm_of_encoder_active_endpoint(struct device_node *node,
                                   struct drm_encoder *encoder,
                                   struct of_endpoint *endpoint);
int drm_of_find_panel_or_bridge(const struct device_node *np,
                                int port, int endpoint,
                                struct drm_panel **panel,
                                struct drm_bridge **bridge);
int drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1,
                                          const struct device_node *port2);
int drm_of_lvds_get_dual_link_pixel_order_sink(struct device_node *port1,
                                               struct device_node *port2);
int drm_of_lvds_get_data_mapping(const struct device_node *port);
int drm_of_get_data_lanes_count(const struct device_node *endpoint,
                                const unsigned int min, const unsigned int max);
int drm_of_get_data_lanes_count_ep(const struct device_node *port,
                                   int port_reg, int reg,
                                   const unsigned int min,
                                   const unsigned int max);
#else
static inline uint32_t drm_of_crtc_port_mask(struct drm_device *dev,
                                          struct device_node *port)
{
        return 0;
}

static inline uint32_t drm_of_find_possible_crtcs(struct drm_device *dev,
                                                  struct device_node *port)
{
        return 0;
}

static inline void
drm_of_component_match_add(struct device *master,
                           struct component_match **matchptr,
                           int (*compare)(struct device *, void *),
                           struct device_node *node)
{
}

static inline int
drm_of_component_probe(struct device *dev,
                       int (*compare_of)(struct device *, void *),
                       const struct component_master_ops *m_ops)
{
        return -EINVAL;
}

static inline int drm_of_encoder_active_endpoint(struct device_node *node,
                                                 struct drm_encoder *encoder,
                                                 struct of_endpoint *endpoint)
{
        return -EINVAL;
}
static inline int drm_of_find_panel_or_bridge(const struct device_node *np,
                                              int port, int endpoint,
                                              struct drm_panel **panel,
                                              struct drm_bridge **bridge)
{
        return -EINVAL;
}

static inline int
drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1,
                                      const struct device_node *port2)
{
        return -EINVAL;
}

static inline int
drm_of_lvds_get_dual_link_pixel_order_sink(struct device_node *port1,
                                           struct device_node *port2)
{
        return -EINVAL;
}

static inline int
drm_of_lvds_get_data_mapping(const struct device_node *port)
{
        return -EINVAL;
}

static inline int
drm_of_get_data_lanes_count(const struct device_node *endpoint,
                            const unsigned int min, const unsigned int max)
{
        return -EINVAL;
}

static inline int
drm_of_get_data_lanes_count_ep(const struct device_node *port,
                               int port_reg, int reg,
                               const unsigned int min,
                               const unsigned int max)
{
        return -EINVAL;
}
#endif

#if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_DRM_MIPI_DSI)
struct mipi_dsi_host *drm_of_get_dsi_bus(struct device *dev);
#else
static inline struct
mipi_dsi_host *drm_of_get_dsi_bus(struct device *dev)
{
        return ERR_PTR(-EINVAL);
}
#endif /* CONFIG_OF && CONFIG_DRM_MIPI_DSI */

/*
 * drm_of_panel_bridge_remove - remove panel bridge
 * @np: device tree node containing panel bridge output ports
 *
 * Remove the panel bridge of a given DT node's port and endpoint number
 *
 * Returns zero if successful, or one of the standard error codes if it fails.
 */
static inline int drm_of_panel_bridge_remove(const struct device_node *np,
                                             int port, int endpoint)
{
#if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_DRM_PANEL_BRIDGE)
        struct drm_bridge *bridge;
        struct device_node *remote;

        remote = of_graph_get_remote_node(np, port, endpoint);
        if (!remote)
                return -ENODEV;

        bridge = of_drm_find_and_get_bridge(remote);
        drm_panel_bridge_remove(bridge);

        drm_bridge_put(bridge);
        of_node_put(remote);

        return 0;
#else
        return -EINVAL;
#endif
}

static inline int drm_of_encoder_active_endpoint_id(struct device_node *node,
                                                    struct drm_encoder *encoder)
{
        struct of_endpoint endpoint;
        int ret = drm_of_encoder_active_endpoint(node, encoder,
                                                 &endpoint);

        return ret ?: endpoint.id;
}

static inline int drm_of_encoder_active_port_id(struct device_node *node,
                                                struct drm_encoder *encoder)
{
        struct of_endpoint endpoint;
        int ret = drm_of_encoder_active_endpoint(node, encoder,
                                                 &endpoint);

        return ret ?: endpoint.port;
}

#endif /* __DRM_OF_H__ */