From 3d3f8b1f8b62c3a010976269df454baa9246fc65 Mon Sep 17 00:00:00 2001 From: Ajay Kumar Date: Tue, 20 Jan 2015 22:08:44 +0530 Subject: drm/bridge: make bridge registration independent of drm flow Currently, third party bridge drivers(ptn3460) are dependent on the corresponding encoder driver init, since bridge driver needs a drm_device pointer to finish drm initializations. The encoder driver passes the drm_device pointer to the bridge driver. Because of this dependency, third party drivers like ptn3460 doesn't adhere to the driver model. In this patch, we reframe the bridge registration framework so that bridge initialization is split into 2 steps, and bridge registration happens independent of drm flow: --Step 1: gather all the bridge settings independent of drm and add the bridge onto a global list of bridges. --Step 2: when the encoder driver is probed, call drm_bridge_attach for the corresponding bridge so that the bridge receives drm_device pointer and continues with connector and other drm initializations. The old set of bridge helpers are removed, and a set of new helpers are added to accomplish the 2 step initialization. The bridge devices register themselves onto global list of bridges when they get probed by calling "drm_bridge_add". The parent encoder driver waits till the bridge is available in the lookup table(by calling "of_drm_find_bridge") and then continues with its initialization. The encoder driver should also call "drm_bridge_attach" to pass on the drm_device to the bridge object. drm_bridge_attach inturn calls "bridge->funcs->attach" so that bridge can continue with drm related initializations. Signed-off-by: Ajay Kumar Acked-by: Inki Dae Tested-by: Rahul Sharma Tested-by: Javier Martinez Canillas Tested-by: Gustavo Padovan Tested-by: Sjoerd Simons Signed-off-by: Thierry Reding --- include/drm/bridge/ptn3460.h | 8 ++++++++ include/drm/drm_crtc.h | 26 +++++++++++++------------- 2 files changed, 21 insertions(+), 13 deletions(-) (limited to 'include') diff --git a/include/drm/bridge/ptn3460.h b/include/drm/bridge/ptn3460.h index ff62344fec6c..b11f8e17e72f 100644 --- a/include/drm/bridge/ptn3460.h +++ b/include/drm/bridge/ptn3460.h @@ -15,6 +15,7 @@ #define _DRM_BRIDGE_PTN3460_H_ struct drm_device; +struct drm_bridge; struct drm_encoder; struct i2c_client; struct device_node; @@ -23,6 +24,9 @@ struct device_node; int ptn3460_init(struct drm_device *dev, struct drm_encoder *encoder, struct i2c_client *client, struct device_node *node); + +void ptn3460_destroy(struct drm_bridge *bridge); + #else static inline int ptn3460_init(struct drm_device *dev, @@ -32,6 +36,10 @@ static inline int ptn3460_init(struct drm_device *dev, return 0; } +static inline void ptn3460_destroy(struct drm_bridge *bridge) +{ +} + #endif #endif diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 15bb762fb316..920e21a8f3fd 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -868,15 +868,16 @@ struct drm_plane { /** * struct drm_bridge_funcs - drm_bridge control functions + * @attach: Called during drm_bridge_attach * @mode_fixup: Try to fixup (or reject entirely) proposed mode for this bridge * @disable: Called right before encoder prepare, disables the bridge * @post_disable: Called right after encoder prepare, for lockstepped disable * @mode_set: Set this mode to the bridge * @pre_enable: Called right before encoder commit, for lockstepped commit * @enable: Called right after encoder commit, enables the bridge - * @destroy: make object go away */ struct drm_bridge_funcs { + int (*attach)(struct drm_bridge *bridge); bool (*mode_fixup)(struct drm_bridge *bridge, const struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode); @@ -887,22 +888,24 @@ struct drm_bridge_funcs { struct drm_display_mode *adjusted_mode); void (*pre_enable)(struct drm_bridge *bridge); void (*enable)(struct drm_bridge *bridge); - void (*destroy)(struct drm_bridge *bridge); }; /** * struct drm_bridge - central DRM bridge control structure * @dev: DRM device this bridge belongs to - * @head: list management + * @of_node: device node pointer to the bridge + * @list: to keep track of all added bridges * @base: base mode object * @funcs: control functions * @driver_private: pointer to the bridge driver's internal context */ struct drm_bridge { struct drm_device *dev; - struct list_head head; - - struct drm_mode_object base; + struct drm_encoder *encoder; +#ifdef CONFIG_OF + struct device_node *of_node; +#endif + struct list_head list; const struct drm_bridge_funcs *funcs; void *driver_private; @@ -1007,7 +1010,6 @@ struct drm_mode_group { uint32_t num_crtcs; uint32_t num_encoders; uint32_t num_connectors; - uint32_t num_bridges; /* list of object IDs for this group */ uint32_t *id_list; @@ -1026,8 +1028,6 @@ struct drm_mode_group { * @fb_list: list of framebuffers available * @num_connector: number of connectors on this device * @connector_list: list of connector objects - * @num_bridge: number of bridges on this device - * @bridge_list: list of bridge objects * @num_encoder: number of encoders on this device * @encoder_list: list of encoder objects * @num_overlay_plane: number of overlay planes on this device @@ -1072,8 +1072,6 @@ struct drm_mode_config { int num_connector; struct list_head connector_list; - int num_bridge; - struct list_head bridge_list; int num_encoder; struct list_head encoder_list; @@ -1222,8 +1220,10 @@ extern unsigned int drm_connector_index(struct drm_connector *connector); /* helper to unplug all connectors from sysfs for device */ extern void drm_connector_unplug_all(struct drm_device *dev); -extern int drm_bridge_init(struct drm_device *dev, struct drm_bridge *bridge); -extern void drm_bridge_cleanup(struct drm_bridge *bridge); +extern int drm_bridge_add(struct drm_bridge *bridge); +extern void drm_bridge_remove(struct drm_bridge *bridge); +extern struct drm_bridge *of_drm_find_bridge(struct device_node *np); +extern int drm_bridge_attach(struct drm_device *dev, struct drm_bridge *bridge); extern int drm_encoder_init(struct drm_device *dev, struct drm_encoder *encoder, -- cgit v1.2.3