forked from luck/tmp_suning_uos_patched
92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* (C) COPYRIGHT 2016 ARM Limited. All rights reserved.
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* Author: Brian Starkey <brian.starkey@arm.com>
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*
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* This program is free software and is provided to you under the terms of the
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* GNU General Public License version 2 as published by the Free Software
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* Foundation, and any use by you of this program is subject to the terms
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* of such GNU licence.
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*/
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#ifndef __DRM_WRITEBACK_H__
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#define __DRM_WRITEBACK_H__
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#include <drm/drm_connector.h>
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#include <drm/drm_encoder.h>
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#include <linux/workqueue.h>
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struct drm_writeback_connector {
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struct drm_connector base;
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/**
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* @encoder: Internal encoder used by the connector to fulfill
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* the DRM framework requirements. The users of the
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* @drm_writeback_connector control the behaviour of the @encoder
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* by passing the @enc_funcs parameter to drm_writeback_connector_init()
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* function.
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*/
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struct drm_encoder encoder;
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/**
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* @pixel_formats_blob_ptr:
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*
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* DRM blob property data for the pixel formats list on writeback
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* connectors
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* See also drm_writeback_connector_init()
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*/
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struct drm_property_blob *pixel_formats_blob_ptr;
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/** @job_lock: Protects job_queue */
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spinlock_t job_lock;
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/**
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* @job_queue:
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*
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* Holds a list of a connector's writeback jobs; the last item is the
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* most recent. The first item may be either waiting for the hardware
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* to begin writing, or currently being written.
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*
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* See also: drm_writeback_queue_job() and
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* drm_writeback_signal_completion()
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*/
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struct list_head job_queue;
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};
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struct drm_writeback_job {
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/**
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* @cleanup_work:
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*
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* Used to allow drm_writeback_signal_completion to defer dropping the
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* framebuffer reference to a workqueue
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*/
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struct work_struct cleanup_work;
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/**
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* @list_entry:
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*
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* List item for the writeback connector's @job_queue
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*/
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struct list_head list_entry;
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/**
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* @fb:
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*
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* Framebuffer to be written to by the writeback connector. Do not set
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* directly, use drm_atomic_set_writeback_fb_for_connector()
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*/
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struct drm_framebuffer *fb;
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};
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int drm_writeback_connector_init(struct drm_device *dev,
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struct drm_writeback_connector *wb_connector,
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const struct drm_connector_funcs *con_funcs,
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const struct drm_encoder_helper_funcs *enc_helper_funcs,
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const u32 *formats, int n_formats);
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void drm_writeback_queue_job(struct drm_writeback_connector *wb_connector,
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struct drm_writeback_job *job);
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void drm_writeback_cleanup_job(struct drm_writeback_job *job);
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void drm_writeback_signal_completion(struct drm_writeback_connector *wb_connector);
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#endif
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