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/*
* Copyright (C) 2013 Google, Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef _VIDEO_ADF_H
#define _VIDEO_ADF_H
#include <linux/device.h>
#include <linux/dma-buf.h>
#include <linux/idr.h>
#include <linux/kref.h>
#include <linux/kthread.h>
#include <linux/ktime.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/scatterlist.h>
#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
#include <linux/workqueue.h>
#include <uapi/video/adf.h>
#include "sync.h"
struct adf_obj;
struct adf_obj_ops;
struct adf_device;
struct adf_device_ops;
struct adf_interface;
struct adf_interface_ops;
struct adf_overlay_engine;
struct adf_overlay_engine_ops;
/**
* struct adf_buffer - buffer displayed by adf_post
*
* @overlay_engine: target overlay engine
* @w: width of display region in pixels
* @h: height of display region in pixels
* @format: DRM-style fourcc, see drm_fourcc.h for standard formats
* @dma_bufs: dma_buf for each plane
* @offset: location of first pixel to scan out, in bytes
* @pitch: length of a scanline including padding, in bytes
* @n_planes: number of planes in buffer
* @acquire_fence: sync_fence which will clear when the buffer is
* ready for display
*
* &struct adf_buffer is the in-kernel counterpart to the userspace-facing
* &struct adf_buffer_config.
*/
struct adf_buffer {
struct adf_overlay_engine *overlay_engine;
u32 w;
u32 h;
u32 format;
struct dma_buf *dma_bufs[ADF_MAX_PLANES];
u32 offset[ADF_MAX_PLANES];
u32 pitch[ADF_MAX_PLANES];
u8 n_planes;
struct sync_fence *acquire_fence;
};
/**
* struct adf_buffer_mapping - state for mapping a &struct adf_buffer into the
* display device
*
* @attachments: dma-buf attachment for each plane
* @sg_tables: SG tables for each plane
*/
struct adf_buffer_mapping {
struct dma_buf_attachment *attachments[ADF_MAX_PLANES];
struct sg_table *sg_tables[ADF_MAX_PLANES];
};
/**
* struct adf_post - request to flip to a new set of buffers
*
* @n_bufs: number of buffers displayed
* @bufs: buffers displayed
* @mappings: in-device mapping state for each buffer
* @custom_data_size: size of driver-private data
* @custom_data: driver-private data
*
* &struct adf_post is the in-kernel counterpart to the userspace-facing
* &struct adf_post_config.
*/
struct adf_post {
size_t n_bufs;
struct adf_buffer *bufs;
struct adf_buffer_mapping *mappings;
size_t custom_data_size;
void *custom_data;
};
/**
* struct adf_attachment - description of attachment between an overlay engine
* and an interface
*
* @overlay_engine: the overlay engine
* @interface: the interface
*
* &struct adf_attachment is the in-kernel counterpart to the userspace-facing
* &struct adf_attachment_config.
*/
struct adf_attachment {
struct adf_overlay_engine *overlay_engine;
struct adf_interface *interface;
};
struct adf_pending_post {
struct list_head head;
struct adf_post config;
void *state;
};
enum adf_obj_type {
ADF_OBJ_OVERLAY_ENGINE = 0,
ADF_OBJ_INTERFACE = 1,
ADF_OBJ_DEVICE = 2,
};
/**
* struct adf_obj_ops - common ADF object implementation ops
*
* @open: handle opening the object's device node
* @release: handle releasing an open file
* @ioctl: handle custom ioctls
*
* @supports_event: return whether the object supports generating events of type
* @type
* @set_event: enable or disable events of type @type
* @event_type_str: return a string representation of custom event @type
* (@type >= %ADF_EVENT_DEVICE_CUSTOM).
*
* @custom_data: copy up to %ADF_MAX_CUSTOM_DATA_SIZE bytes of driver-private
* data into @data (allocated by ADF) and return the number of copied bytes
* in @size. Return 0 on success or an error code (<0) on failure.
*/
struct adf_obj_ops {
/* optional */
int (*open)(struct adf_obj *obj, struct inode *inode,
struct file *file);
/* optional */
void (*release)(struct adf_obj *obj, struct inode *inode,
struct file *file);
/* optional */
long (*ioctl)(struct adf_obj *obj, unsigned int cmd, unsigned long arg);
/* optional */
bool (*supports_event)(struct adf_obj *obj, enum adf_event_type type);
/* required if supports_event is implemented */
void (*set_event)(struct adf_obj *obj, enum adf_event_type type,
bool enabled);
/* optional */
const char *(*event_type_str)(struct adf_obj *obj,
enum adf_event_type type);
/* optional */
int (*custom_data)(struct adf_obj *obj, void *data, size_t *size);
};
struct adf_obj {
enum adf_obj_type type;
char name[ADF_NAME_LEN];
struct adf_device *parent;
const struct adf_obj_ops *ops;
struct device dev;
struct spinlock file_lock;
struct list_head file_list;
struct mutex event_lock;
struct rb_root event_refcount;
int id;
int minor;
};
/**
* struct adf_device_quirks - common display device quirks
*
* @buffer_padding: whether the last scanline of a buffer extends to the
* buffer's pitch (@ADF_BUFFER_PADDED_TO_PITCH) or just to the visible
* width (@ADF_BUFFER_UNPADDED)
*/
struct adf_device_quirks {
/* optional, defaults to ADF_BUFFER_PADDED_TO_PITCH */
enum {
ADF_BUFFER_PADDED_TO_PITCH = 0,
ADF_BUFFER_UNPADDED = 1,
} buffer_padding;
};
/**
* struct adf_device_ops - display device implementation ops
*
* @owner: device's module
* @base: common operations (see &struct adf_obj_ops)
* @quirks: device's quirks (see &struct adf_device_quirks)
*
* @attach: attach overlay engine @eng to interface @intf. Return 0 on success
* or error code (<0) on failure.
* @detach: detach overlay engine @eng from interface @intf. Return 0 on
* success or error code (<0) on failure.
*
* @validate_custom_format: validate the number and size of planes
* in buffers with a custom format (i.e., not one of the @DRM_FORMAT_*
* types defined in drm/drm_fourcc.h). Return 0 if the buffer is valid or
* an error code (<0) otherwise.
*
* @validate: validate that the proposed configuration @cfg is legal. The
* driver may optionally allocate and return some driver-private state in
* @driver_state, which will be passed to the corresponding post(). The
* driver may NOT commit any changes to hardware. Return 0 if @cfg is
* valid or an error code (<0) otherwise.
* @complete_fence: create a hardware-backed sync fence to be signaled when
* @cfg is removed from the screen. If unimplemented, ADF automatically
* creates an sw_sync fence. Return the sync fence on success or a
* PTR_ERR() on failure.
* @post: flip @cfg onto the screen. Wait for the display to begin scanning out
* @cfg before returning.
* @advance_timeline: signal the sync fence for the last configuration to leave
* the display. If unimplemented, ADF automatically advances an sw_sync
* timeline.
* @state_free: free driver-private state allocated during validate()
*/
struct adf_device_ops {
/* required */
struct module *owner;
const struct adf_obj_ops base;
/* optional */
const struct adf_device_quirks quirks;
/* optional */
int (*attach)(struct adf_device *dev, struct adf_overlay_engine *eng,
struct adf_interface *intf);
/* optional */
int (*detach)(struct adf_device *dev, struct adf_overlay_engine *eng,
struct adf_interface *intf);
/* required if any of the device's overlay engines supports at least one
custom format */
int (*validate_custom_format)(struct adf_device *dev,
struct adf_buffer *buf);
/* required */
int (*validate)(struct adf_device *dev, struct adf_post *cfg,
void **driver_state);
/* optional */
struct sync_fence *(*complete_fence)(struct adf_device *dev,
struct adf_post *cfg, void *driver_state);
/* required */
void (*post)(struct adf_device *dev, struct adf_post *cfg,
void *driver_state);
/* required if complete_fence is implemented */
void (*advance_timeline)(struct adf_device *dev,
struct adf_post *cfg, void *driver_state);
/* required if validate allocates driver state */
void (*state_free)(struct adf_device *dev, void *driver_state);
};
struct adf_attachment_list {
struct adf_attachment attachment;
struct list_head head;
};
struct adf_device {
struct adf_obj base;
struct device *dev;
const struct adf_device_ops *ops;
struct mutex client_lock;
struct idr interfaces;
size_t n_interfaces;
struct idr overlay_engines;
struct list_head post_list;
struct mutex post_lock;
struct kthread_worker post_worker;
struct task_struct *post_thread;
struct kthread_work post_work;
struct list_head attached;
size_t n_attached;
struct list_head attach_allowed;
size_t n_attach_allowed;
struct adf_pending_post *onscreen;
struct sw_sync_timeline *timeline;
int timeline_max;
};
/**
* struct adf_interface_ops - display interface implementation ops
*
* @base: common operations (see &struct adf_obj_ops)
*
* @blank: change the display's DPMS state. Return 0 on success or error
* code (<0) on failure.
*
* @alloc_simple_buffer: allocate a buffer with the specified @w, @h, and
* @format. @format will be a standard RGB format (i.e.,
* adf_format_is_rgb(@format) == true). Return 0 on success or error code
* (<0) on failure. On success, return the buffer, offset, and pitch in
* @dma_buf, @offset, and @pitch respectively.
* @describe_simple_post: provide driver-private data needed to post a single
* buffer @buf. Copy up to ADF_MAX_CUSTOM_DATA_SIZE bytes into @data
* (allocated by ADF) and return the number of bytes in @size. Return 0 on
* success or error code (<0) on failure.
*
* @modeset: change the interface's mode. @mode is not necessarily part of the
* modelist passed to adf_hotplug_notify_connected(); the driver may
* accept or reject custom modes at its discretion. Return 0 on success or
* error code (<0) if the mode could not be set.
*
* @screen_size: copy the screen dimensions in millimeters into @width_mm
* and @height_mm. Return 0 on success or error code (<0) if the display
* dimensions are unknown.
*
* @type_str: return a string representation of custom @intf->type
* (@intf->type >= @ADF_INTF_TYPE_DEVICE_CUSTOM).
*/
struct adf_interface_ops {
const struct adf_obj_ops base;
/* optional */
int (*blank)(struct adf_interface *intf, u8 state);
/* optional */
int (*alloc_simple_buffer)(struct adf_interface *intf,
u16 w, u16 h, u32 format,
struct dma_buf **dma_buf, u32 *offset, u32 *pitch);
/* optional */
int (*describe_simple_post)(struct adf_interface *intf,
struct adf_buffer *fb, void *data, size_t *size);
/* optional */
int (*modeset)(struct adf_interface *intf,
struct drm_mode_modeinfo *mode);
/* optional */
int (*screen_size)(struct adf_interface *intf, u16 *width_mm,
u16 *height_mm);
/* optional */
const char *(*type_str)(struct adf_interface *intf);
};
struct adf_interface {
struct adf_obj base;
const struct adf_interface_ops *ops;
struct drm_mode_modeinfo current_mode;
enum adf_interface_type type;
u32 idx;
u32 flags;
wait_queue_head_t vsync_wait;
ktime_t vsync_timestamp;
rwlock_t vsync_lock;
u8 dpms_state;
bool hotplug_detect;
struct drm_mode_modeinfo *modelist;
size_t n_modes;
rwlock_t hotplug_modelist_lock;
};
/**
* struct adf_interface_ops - overlay engine implementation ops
*
* @base: common operations (see &struct adf_obj_ops)
*
* @supported_formats: list of fourccs the overlay engine can scan out
* @n_supported_formats: length of supported_formats, up to
* ADF_MAX_SUPPORTED_FORMATS
*/
struct adf_overlay_engine_ops {
const struct adf_obj_ops base;
/* required */
const u32 *supported_formats;
/* required */
const size_t n_supported_formats;
};
struct adf_overlay_engine {
struct adf_obj base;
const struct adf_overlay_engine_ops *ops;
};
#define adf_obj_to_device(ptr) \
container_of((ptr), struct adf_device, base)
#define adf_obj_to_interface(ptr) \
container_of((ptr), struct adf_interface, base)
#define adf_obj_to_overlay_engine(ptr) \
container_of((ptr), struct adf_overlay_engine, base)
int __printf(4, 5) adf_device_init(struct adf_device *dev,
struct device *parent, const struct adf_device_ops *ops,
const char *fmt, ...);
void adf_device_destroy(struct adf_device *dev);
int __printf(7, 8) adf_interface_init(struct adf_interface *intf,
struct adf_device *dev, enum adf_interface_type type, u32 idx,
u32 flags, const struct adf_interface_ops *ops, const char *fmt,
...);
void adf_interface_destroy(struct adf_interface *intf);
static inline struct adf_device *adf_interface_parent(
struct adf_interface *intf)
{
return intf->base.parent;
}
int __printf(4, 5) adf_overlay_engine_init(struct adf_overlay_engine *eng,
struct adf_device *dev,
const struct adf_overlay_engine_ops *ops, const char *fmt, ...);
void adf_overlay_engine_destroy(struct adf_overlay_engine *eng);
static inline struct adf_device *adf_overlay_engine_parent(
struct adf_overlay_engine *eng)
{
return eng->base.parent;
}
int adf_attachment_allow(struct adf_device *dev, struct adf_overlay_engine *eng,
struct adf_interface *intf);
const char *adf_obj_type_str(enum adf_obj_type type);
const char *adf_interface_type_str(struct adf_interface *intf);
const char *adf_event_type_str(struct adf_obj *obj, enum adf_event_type type);
#define ADF_FORMAT_STR_SIZE 5
void adf_format_str(u32 format, char buf[ADF_FORMAT_STR_SIZE]);
int adf_format_validate_yuv(struct adf_device *dev, struct adf_buffer *buf,
u8 num_planes, u8 hsub, u8 vsub, u8 cpp[]);
/**
* adf_format_validate_rgb - validate the number and size of planes in buffers
* with a custom RGB format.
*
* @dev: ADF device performing the validation
* @buf: buffer to validate
* @cpp: expected bytes per pixel
*
* adf_format_validate_rgb() is intended to be called as a helper from @dev's
* validate_custom_format() op. @buf must have a single RGB plane.
*
* Returns 0 if @buf has a single plane with sufficient size, or -EINVAL
* otherwise.
*/
static inline int adf_format_validate_rgb(struct adf_device *dev,
struct adf_buffer *buf, u8 cpp)
{
return adf_format_validate_yuv(dev, buf, 1, 1, 1, &cpp);
}
int adf_event_get(struct adf_obj *obj, enum adf_event_type type);
int adf_event_put(struct adf_obj *obj, enum adf_event_type type);
int adf_event_notify(struct adf_obj *obj, struct adf_event *event);
static inline void adf_vsync_get(struct adf_interface *intf)
{
adf_event_get(&intf->base, ADF_EVENT_VSYNC);
}
static inline void adf_vsync_put(struct adf_interface *intf)
{
adf_event_put(&intf->base, ADF_EVENT_VSYNC);
}
int adf_vsync_wait(struct adf_interface *intf, long timeout);
void adf_vsync_notify(struct adf_interface *intf, ktime_t timestamp);
int adf_hotplug_notify_connected(struct adf_interface *intf,
struct drm_mode_modeinfo *modelist, size_t n_modes);
void adf_hotplug_notify_disconnected(struct adf_interface *intf);
void adf_modeinfo_set_name(struct drm_mode_modeinfo *mode);
void adf_modeinfo_set_vrefresh(struct drm_mode_modeinfo *mode);
#endif /* _VIDEO_ADF_H */