forked from luck/tmp_suning_uos_patched
97eb9eaeb9
The drm_writeback_queue_job() function takes ownership of the passed job and requires the caller to manually set the connector state writeback_job pointer to NULL. To simplify drivers and avoid errors (such as the missing NULL set in the vc4 driver), pass the connector state pointer to the function instead of the job pointer, and set the writeback_job pointer to NULL internally. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Brian Starkey <brian.starkey@arm.com> Acked-by: Eric Anholt <eric@anholt.net> Acked-by: Liviu Dudau <liviu.dudau@arm.com> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
137 lines
3.4 KiB
C
137 lines
3.4 KiB
C
/* 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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* @fence_context:
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*
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* timeline context used for fence operations.
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*/
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unsigned int fence_context;
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/**
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* @fence_lock:
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*
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* spinlock to protect the fences in the fence_context.
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*/
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spinlock_t fence_lock;
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/**
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* @fence_seqno:
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*
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* Seqno variable used as monotonic counter for the fences
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* created on the connector's timeline.
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*/
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unsigned long fence_seqno;
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/**
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* @timeline_name:
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*
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* The name of the connector's fence timeline.
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*/
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char timeline_name[32];
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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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* @out_fence:
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*
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* Fence which will signal once the writeback has completed
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*/
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struct dma_fence *out_fence;
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};
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static inline struct drm_writeback_connector *
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drm_connector_to_writeback(struct drm_connector *connector)
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{
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return container_of(connector, struct drm_writeback_connector, base);
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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_connector_state *conn_state);
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void drm_writeback_cleanup_job(struct drm_writeback_job *job);
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void
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drm_writeback_signal_completion(struct drm_writeback_connector *wb_connector,
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int status);
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struct dma_fence *
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drm_writeback_get_out_fence(struct drm_writeback_connector *wb_connector);
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#endif
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