1 /*
2  * Copyright 2015 Advanced Micro Devices, Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  * Authors: AMD
23  *
24  */
25 
26 /* DC interface (public) */
27 #include "dm_services.h"
28 #include "dc.h"
29 
30 /* DC core (private) */
31 #include "core_types.h"
32 #include "transform.h"
33 #include "dpp.h"
34 
35 /*******************************************************************************
36  * Private functions
37  ******************************************************************************/
38 static void construct(struct dc_context *ctx, struct dc_plane_state *plane_state)
39 {
40 	plane_state->ctx = ctx;
41 
42 	plane_state->gamma_correction = dc_create_gamma();
43 	plane_state->gamma_correction->is_identity = true;
44 
45 	plane_state->in_transfer_func = dc_create_transfer_func();
46 	plane_state->in_transfer_func->type = TF_TYPE_BYPASS;
47 }
48 
49 static void destruct(struct dc_plane_state *plane_state)
50 {
51 	if (plane_state->gamma_correction != NULL) {
52 		dc_gamma_release(&plane_state->gamma_correction);
53 	}
54 	if (plane_state->in_transfer_func != NULL) {
55 		dc_transfer_func_release(
56 				plane_state->in_transfer_func);
57 		plane_state->in_transfer_func = NULL;
58 	}
59 }
60 
61 /*******************************************************************************
62  * Public functions
63  ******************************************************************************/
64 void enable_surface_flip_reporting(struct dc_plane_state *plane_state,
65 		uint32_t controller_id)
66 {
67 	plane_state->irq_source = controller_id + DC_IRQ_SOURCE_PFLIP1 - 1;
68 	/*register_flip_interrupt(surface);*/
69 }
70 
71 struct dc_plane_state *dc_create_plane_state(struct dc *dc)
72 {
73 	struct dc *core_dc = dc;
74 
75 	struct dc_plane_state *plane_state = kzalloc(sizeof(*plane_state),
76 						      GFP_KERNEL);
77 
78 	if (NULL == plane_state)
79 		return NULL;
80 
81 	kref_init(&plane_state->refcount);
82 	construct(core_dc->ctx, plane_state);
83 
84 	return plane_state;
85 }
86 
87 /**
88  *****************************************************************************
89  *  Function: dc_plane_get_status
90  *
91  *  @brief
92  *     Looks up the pipe context of plane_state and updates the pending status
93  *     of the pipe context. Then returns plane_state->status
94  *
95  *  @param [in] plane_state: pointer to the plane_state to get the status of
96  *****************************************************************************
97  */
98 const struct dc_plane_status *dc_plane_get_status(
99 		const struct dc_plane_state *plane_state)
100 {
101 	const struct dc_plane_status *plane_status;
102 	struct dc  *core_dc;
103 	int i;
104 
105 	if (!plane_state ||
106 		!plane_state->ctx ||
107 		!plane_state->ctx->dc) {
108 		ASSERT(0);
109 		return NULL; /* remove this if above assert never hit */
110 	}
111 
112 	plane_status = &plane_state->status;
113 	core_dc = plane_state->ctx->dc;
114 
115 	if (core_dc->current_state == NULL)
116 		return NULL;
117 
118 	for (i = 0; i < core_dc->res_pool->pipe_count; i++) {
119 		struct pipe_ctx *pipe_ctx =
120 				&core_dc->current_state->res_ctx.pipe_ctx[i];
121 
122 		if (pipe_ctx->plane_state != plane_state)
123 			continue;
124 
125 		core_dc->hwss.update_pending_status(pipe_ctx);
126 	}
127 
128 	return plane_status;
129 }
130 
131 void dc_plane_state_retain(struct dc_plane_state *plane_state)
132 {
133 	kref_get(&plane_state->refcount);
134 }
135 
136 static void dc_plane_state_free(struct kref *kref)
137 {
138 	struct dc_plane_state *plane_state = container_of(kref, struct dc_plane_state, refcount);
139 	destruct(plane_state);
140 	kvfree(plane_state);
141 }
142 
143 void dc_plane_state_release(struct dc_plane_state *plane_state)
144 {
145 	kref_put(&plane_state->refcount, dc_plane_state_free);
146 }
147 
148 void dc_gamma_retain(struct dc_gamma *gamma)
149 {
150 	kref_get(&gamma->refcount);
151 }
152 
153 static void dc_gamma_free(struct kref *kref)
154 {
155 	struct dc_gamma *gamma = container_of(kref, struct dc_gamma, refcount);
156 	kvfree(gamma);
157 }
158 
159 void dc_gamma_release(struct dc_gamma **gamma)
160 {
161 	kref_put(&(*gamma)->refcount, dc_gamma_free);
162 	*gamma = NULL;
163 }
164 
165 struct dc_gamma *dc_create_gamma(void)
166 {
167 	struct dc_gamma *gamma = kzalloc(sizeof(*gamma), GFP_KERNEL);
168 
169 	if (gamma == NULL)
170 		goto alloc_fail;
171 
172 	kref_init(&gamma->refcount);
173 	return gamma;
174 
175 alloc_fail:
176 	return NULL;
177 }
178 
179 void dc_transfer_func_retain(struct dc_transfer_func *tf)
180 {
181 	kref_get(&tf->refcount);
182 }
183 
184 static void dc_transfer_func_free(struct kref *kref)
185 {
186 	struct dc_transfer_func *tf = container_of(kref, struct dc_transfer_func, refcount);
187 	kvfree(tf);
188 }
189 
190 void dc_transfer_func_release(struct dc_transfer_func *tf)
191 {
192 	kref_put(&tf->refcount, dc_transfer_func_free);
193 }
194 
195 struct dc_transfer_func *dc_create_transfer_func(void)
196 {
197 	struct dc_transfer_func *tf = kzalloc(sizeof(*tf), GFP_KERNEL);
198 
199 	if (tf == NULL)
200 		goto alloc_fail;
201 
202 	kref_init(&tf->refcount);
203 
204 	return tf;
205 
206 alloc_fail:
207 	return NULL;
208 }
209 
210 
211