drm_writeback.h

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/* SPDX-License-Identifier: GPL-2.0 */
/*
 * (C) COPYRIGHT 2016 ARM Limited. All rights reserved.
 * Author: Brian Starkey <brian.starkey@arm.com>
 *
 * This program is free software and is provided to you under the terms of the
 * GNU General Public License version 2 as published by the Free Software
 * Foundation, and any use by you of this program is subject to the terms
 * of such GNU licence.
 */
 
#ifndef __DRM_WRITEBACK_H__
#define __DRM_WRITEBACK_H__
#include <drm/drm_connector.h>
#include <drm/drm_encoder.h>
#include <linux/workqueue.h>
 
struct drm_writeback_connector {
    struct drm_connector base;
 
    struct drm_encoder encoder;
 
    struct drm_property_blob *pixel_formats_blob_ptr;
 
    spinlock_t job_lock;
 
    struct list_head job_queue;
 
    unsigned int fence_context;
    spinlock_t fence_lock;
    unsigned long fence_seqno;
    char timeline_name[32];
};
 
struct drm_writeback_job {
    struct drm_writeback_connector *connector;
 
    bool prepared;
 
    struct work_struct cleanup_work;
 
    struct list_head list_entry;
 
    struct drm_framebuffer *fb;
 
    struct dma_fence *out_fence;
 
    void *priv;
};
 
static inline struct drm_writeback_connector *
drm_connector_to_writeback(struct drm_connector *connector)
{
    return container_of(connector, struct drm_writeback_connector, base);
}
 
int drm_writeback_connector_init(struct drm_device *dev,
                 struct drm_writeback_connector *wb_connector,
                 const struct drm_connector_funcs *con_funcs,
                 const struct drm_encoder_helper_funcs *enc_helper_funcs,
                 const u32 *formats, int n_formats,
                 u32 possible_crtcs);
 
int drm_writeback_connector_init_with_encoder(struct drm_device *dev,
                struct drm_writeback_connector *wb_connector,
                struct drm_encoder *enc,
                const struct drm_connector_funcs *con_funcs, const u32 *formats,
                int n_formats);
 
int drmm_writeback_connector_init(struct drm_device *dev,
                  struct drm_writeback_connector *wb_connector,
                  const struct drm_connector_funcs *con_funcs,
                  struct drm_encoder *enc,
                  const u32 *formats, int n_formats);
 
int drm_writeback_set_fb(struct drm_connector_state *conn_state,
             struct drm_framebuffer *fb);
 
int drm_writeback_prepare_job(struct drm_writeback_job *job);
 
void drm_writeback_queue_job(struct drm_writeback_connector *wb_connector,
                 struct drm_connector_state *conn_state);
 
void drm_writeback_cleanup_job(struct drm_writeback_job *job);
 
void
drm_writeback_signal_completion(struct drm_writeback_connector *wb_connector,
                int status);
 
struct dma_fence *
drm_writeback_get_out_fence(struct drm_writeback_connector *wb_connector);
#endif