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1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* | |
3 | * (C) COPYRIGHT 2016 ARM Limited. All rights reserved. | |
4 | * Author: Brian Starkey <brian.starkey@arm.com> | |
5 | * | |
6 | * This program is free software and is provided to you under the terms of the | |
7 | * GNU General Public License version 2 as published by the Free Software | |
8 | * Foundation, and any use by you of this program is subject to the terms | |
9 | * of such GNU licence. | |
10 | */ | |
11 | ||
12 | #ifndef __DRM_WRITEBACK_H__ | |
13 | #define __DRM_WRITEBACK_H__ | |
14 | #include <drm/drm_connector.h> | |
15 | #include <drm/drm_encoder.h> | |
16 | #include <linux/workqueue.h> | |
17 | ||
e2d7fc20 SR |
18 | /** |
19 | * struct drm_writeback_connector - DRM writeback connector | |
20 | */ | |
935774cd | 21 | struct drm_writeback_connector { |
e2d7fc20 SR |
22 | /** |
23 | * @base: base drm_connector object | |
24 | */ | |
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25 | struct drm_connector base; |
26 | ||
27 | /** | |
28 | * @encoder: Internal encoder used by the connector to fulfill | |
29 | * the DRM framework requirements. The users of the | |
30 | * @drm_writeback_connector control the behaviour of the @encoder | |
31 | * by passing the @enc_funcs parameter to drm_writeback_connector_init() | |
32 | * function. | |
33 | */ | |
34 | struct drm_encoder encoder; | |
35 | ||
36 | /** | |
37 | * @pixel_formats_blob_ptr: | |
38 | * | |
39 | * DRM blob property data for the pixel formats list on writeback | |
40 | * connectors | |
41 | * See also drm_writeback_connector_init() | |
42 | */ | |
43 | struct drm_property_blob *pixel_formats_blob_ptr; | |
44 | ||
45 | /** @job_lock: Protects job_queue */ | |
46 | spinlock_t job_lock; | |
47 | ||
48 | /** | |
49 | * @job_queue: | |
50 | * | |
51 | * Holds a list of a connector's writeback jobs; the last item is the | |
52 | * most recent. The first item may be either waiting for the hardware | |
53 | * to begin writing, or currently being written. | |
54 | * | |
55 | * See also: drm_writeback_queue_job() and | |
56 | * drm_writeback_signal_completion() | |
57 | */ | |
58 | struct list_head job_queue; | |
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59 | |
60 | /** | |
61 | * @fence_context: | |
62 | * | |
63 | * timeline context used for fence operations. | |
64 | */ | |
65 | unsigned int fence_context; | |
66 | /** | |
67 | * @fence_lock: | |
68 | * | |
69 | * spinlock to protect the fences in the fence_context. | |
70 | */ | |
71 | spinlock_t fence_lock; | |
72 | /** | |
73 | * @fence_seqno: | |
74 | * | |
75 | * Seqno variable used as monotonic counter for the fences | |
76 | * created on the connector's timeline. | |
77 | */ | |
78 | unsigned long fence_seqno; | |
79 | /** | |
80 | * @timeline_name: | |
81 | * | |
82 | * The name of the connector's fence timeline. | |
83 | */ | |
84 | char timeline_name[32]; | |
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85 | }; |
86 | ||
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87 | /** |
88 | * struct drm_writeback_job - DRM writeback job | |
89 | */ | |
935774cd | 90 | struct drm_writeback_job { |
9d2230dc LP |
91 | /** |
92 | * @connector: | |
93 | * | |
94 | * Back-pointer to the writeback connector associated with the job | |
95 | */ | |
96 | struct drm_writeback_connector *connector; | |
97 | ||
98 | /** | |
99 | * @prepared: | |
100 | * | |
101 | * Set when the job has been prepared with drm_writeback_prepare_job() | |
102 | */ | |
103 | bool prepared; | |
104 | ||
935774cd BS |
105 | /** |
106 | * @cleanup_work: | |
107 | * | |
108 | * Used to allow drm_writeback_signal_completion to defer dropping the | |
109 | * framebuffer reference to a workqueue | |
110 | */ | |
111 | struct work_struct cleanup_work; | |
112 | ||
113 | /** | |
114 | * @list_entry: | |
115 | * | |
116 | * List item for the writeback connector's @job_queue | |
117 | */ | |
118 | struct list_head list_entry; | |
119 | ||
120 | /** | |
121 | * @fb: | |
122 | * | |
123 | * Framebuffer to be written to by the writeback connector. Do not set | |
9d2230dc | 124 | * directly, use drm_writeback_set_fb() |
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125 | */ |
126 | struct drm_framebuffer *fb; | |
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127 | |
128 | /** | |
129 | * @out_fence: | |
130 | * | |
131 | * Fence which will signal once the writeback has completed | |
132 | */ | |
133 | struct dma_fence *out_fence; | |
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134 | |
135 | /** | |
136 | * @priv: | |
137 | * | |
138 | * Driver-private data | |
139 | */ | |
140 | void *priv; | |
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141 | }; |
142 | ||
b82c1f8f BB |
143 | static inline struct drm_writeback_connector * |
144 | drm_connector_to_writeback(struct drm_connector *connector) | |
145 | { | |
146 | return container_of(connector, struct drm_writeback_connector, base); | |
147 | } | |
148 | ||
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149 | int drm_writeback_connector_init(struct drm_device *dev, |
150 | struct drm_writeback_connector *wb_connector, | |
151 | const struct drm_connector_funcs *con_funcs, | |
152 | const struct drm_encoder_helper_funcs *enc_helper_funcs, | |
153 | const u32 *formats, int n_formats); | |
154 | ||
9d2230dc LP |
155 | int drm_writeback_set_fb(struct drm_connector_state *conn_state, |
156 | struct drm_framebuffer *fb); | |
157 | ||
158 | int drm_writeback_prepare_job(struct drm_writeback_job *job); | |
159 | ||
935774cd | 160 | void drm_writeback_queue_job(struct drm_writeback_connector *wb_connector, |
97eb9eae | 161 | struct drm_connector_state *conn_state); |
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162 | |
163 | void drm_writeback_cleanup_job(struct drm_writeback_job *job); | |
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164 | |
165 | void | |
166 | drm_writeback_signal_completion(struct drm_writeback_connector *wb_connector, | |
167 | int status); | |
168 | ||
169 | struct dma_fence * | |
170 | drm_writeback_get_out_fence(struct drm_writeback_connector *wb_connector); | |
935774cd | 171 | #endif |