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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 #include <linux/mm.h>
27 
28 /* DC interface (public) */
29 #include "dm_services.h"
30 #include "dc.h"
31 
32 /* DC core (private) */
33 #include "core_types.h"
34 #include "transform.h"
35 #include "dpp.h"
36 
37 /*******************************************************************************
38  * Private functions
39  ******************************************************************************/
construct(struct dc_context * ctx,struct dc_plane_state * plane_state)40 static void construct(struct dc_context *ctx, struct dc_plane_state *plane_state)
41 {
42 	plane_state->ctx = ctx;
43 
44 	plane_state->gamma_correction = dc_create_gamma();
45 	if (plane_state->gamma_correction != NULL)
46 		plane_state->gamma_correction->is_identity = true;
47 
48 	plane_state->in_transfer_func = dc_create_transfer_func();
49 	if (plane_state->in_transfer_func != NULL) {
50 		plane_state->in_transfer_func->type = TF_TYPE_BYPASS;
51 		plane_state->in_transfer_func->ctx = ctx;
52 	}
53 #if defined(CONFIG_DRM_AMD_DC_DCN2_0)
54 	plane_state->in_shaper_func = dc_create_transfer_func();
55 	if (plane_state->in_shaper_func != NULL) {
56 		plane_state->in_shaper_func->type = TF_TYPE_BYPASS;
57 		plane_state->in_shaper_func->ctx = ctx;
58 	}
59 
60 	plane_state->lut3d_func = dc_create_3dlut_func();
61 	if (plane_state->lut3d_func != NULL) {
62 		plane_state->lut3d_func->ctx = ctx;
63 	}
64 	plane_state->blend_tf = dc_create_transfer_func();
65 	if (plane_state->blend_tf != NULL) {
66 		plane_state->blend_tf->type = TF_TYPE_BYPASS;
67 		plane_state->blend_tf->ctx = ctx;
68 	}
69 
70 #endif
71 }
72 
destruct(struct dc_plane_state * plane_state)73 static void destruct(struct dc_plane_state *plane_state)
74 {
75 	if (plane_state->gamma_correction != NULL) {
76 		dc_gamma_release(&plane_state->gamma_correction);
77 	}
78 	if (plane_state->in_transfer_func != NULL) {
79 		dc_transfer_func_release(
80 				plane_state->in_transfer_func);
81 		plane_state->in_transfer_func = NULL;
82 	}
83 #if defined(CONFIG_DRM_AMD_DC_DCN2_0)
84 	if (plane_state->in_shaper_func != NULL) {
85 		dc_transfer_func_release(
86 				plane_state->in_shaper_func);
87 		plane_state->in_shaper_func = NULL;
88 	}
89 	if (plane_state->lut3d_func != NULL) {
90 		dc_3dlut_func_release(
91 				plane_state->lut3d_func);
92 		plane_state->lut3d_func = NULL;
93 	}
94 	if (plane_state->blend_tf != NULL) {
95 		dc_transfer_func_release(
96 				plane_state->blend_tf);
97 		plane_state->blend_tf = NULL;
98 	}
99 
100 #endif
101 }
102 
103 /*******************************************************************************
104  * Public functions
105  ******************************************************************************/
enable_surface_flip_reporting(struct dc_plane_state * plane_state,uint32_t controller_id)106 void enable_surface_flip_reporting(struct dc_plane_state *plane_state,
107 		uint32_t controller_id)
108 {
109 	plane_state->irq_source = controller_id + DC_IRQ_SOURCE_PFLIP1 - 1;
110 	/*register_flip_interrupt(surface);*/
111 }
112 
dc_create_plane_state(struct dc * dc)113 struct dc_plane_state *dc_create_plane_state(struct dc *dc)
114 {
115 	struct dc *core_dc = dc;
116 
117 	struct dc_plane_state *plane_state = kvzalloc(sizeof(*plane_state),
118 						      GFP_KERNEL);
119 
120 	if (NULL == plane_state)
121 		return NULL;
122 
123 	kref_init(&plane_state->refcount);
124 	construct(core_dc->ctx, plane_state);
125 
126 	return plane_state;
127 }
128 
129 /**
130  *****************************************************************************
131  *  Function: dc_plane_get_status
132  *
133  *  @brief
134  *     Looks up the pipe context of plane_state and updates the pending status
135  *     of the pipe context. Then returns plane_state->status
136  *
137  *  @param [in] plane_state: pointer to the plane_state to get the status of
138  *****************************************************************************
139  */
dc_plane_get_status(const struct dc_plane_state * plane_state)140 const struct dc_plane_status *dc_plane_get_status(
141 		const struct dc_plane_state *plane_state)
142 {
143 	const struct dc_plane_status *plane_status;
144 	struct dc  *core_dc;
145 	int i;
146 
147 	if (!plane_state ||
148 		!plane_state->ctx ||
149 		!plane_state->ctx->dc) {
150 		ASSERT(0);
151 		return NULL; /* remove this if above assert never hit */
152 	}
153 
154 	plane_status = &plane_state->status;
155 	core_dc = plane_state->ctx->dc;
156 
157 	if (core_dc->current_state == NULL)
158 		return NULL;
159 
160 	/* Find the current plane state and set its pending bit to false */
161 	for (i = 0; i < core_dc->res_pool->pipe_count; i++) {
162 		struct pipe_ctx *pipe_ctx =
163 				&core_dc->current_state->res_ctx.pipe_ctx[i];
164 
165 		if (pipe_ctx->plane_state != plane_state)
166 			continue;
167 
168 		pipe_ctx->plane_state->status.is_flip_pending = false;
169 
170 		break;
171 	}
172 
173 	for (i = 0; i < core_dc->res_pool->pipe_count; i++) {
174 		struct pipe_ctx *pipe_ctx =
175 				&core_dc->current_state->res_ctx.pipe_ctx[i];
176 
177 		if (pipe_ctx->plane_state != plane_state)
178 			continue;
179 
180 		core_dc->hwss.update_pending_status(pipe_ctx);
181 	}
182 
183 	return plane_status;
184 }
185 
dc_plane_state_retain(struct dc_plane_state * plane_state)186 void dc_plane_state_retain(struct dc_plane_state *plane_state)
187 {
188 	kref_get(&plane_state->refcount);
189 }
190 
dc_plane_state_free(struct kref * kref)191 static void dc_plane_state_free(struct kref *kref)
192 {
193 	struct dc_plane_state *plane_state = container_of(kref, struct dc_plane_state, refcount);
194 	destruct(plane_state);
195 	kvfree(plane_state);
196 }
197 
dc_plane_state_release(struct dc_plane_state * plane_state)198 void dc_plane_state_release(struct dc_plane_state *plane_state)
199 {
200 	kref_put(&plane_state->refcount, dc_plane_state_free);
201 }
202 
dc_gamma_retain(struct dc_gamma * gamma)203 void dc_gamma_retain(struct dc_gamma *gamma)
204 {
205 	kref_get(&gamma->refcount);
206 }
207 
dc_gamma_free(struct kref * kref)208 static void dc_gamma_free(struct kref *kref)
209 {
210 	struct dc_gamma *gamma = container_of(kref, struct dc_gamma, refcount);
211 	kvfree(gamma);
212 }
213 
dc_gamma_release(struct dc_gamma ** gamma)214 void dc_gamma_release(struct dc_gamma **gamma)
215 {
216 	kref_put(&(*gamma)->refcount, dc_gamma_free);
217 	*gamma = NULL;
218 }
219 
dc_create_gamma(void)220 struct dc_gamma *dc_create_gamma(void)
221 {
222 	struct dc_gamma *gamma = kvzalloc(sizeof(*gamma), GFP_KERNEL);
223 
224 	if (gamma == NULL)
225 		goto alloc_fail;
226 
227 	kref_init(&gamma->refcount);
228 	return gamma;
229 
230 alloc_fail:
231 	return NULL;
232 }
233 
dc_transfer_func_retain(struct dc_transfer_func * tf)234 void dc_transfer_func_retain(struct dc_transfer_func *tf)
235 {
236 	kref_get(&tf->refcount);
237 }
238 
dc_transfer_func_free(struct kref * kref)239 static void dc_transfer_func_free(struct kref *kref)
240 {
241 	struct dc_transfer_func *tf = container_of(kref, struct dc_transfer_func, refcount);
242 	kvfree(tf);
243 }
244 
dc_transfer_func_release(struct dc_transfer_func * tf)245 void dc_transfer_func_release(struct dc_transfer_func *tf)
246 {
247 	kref_put(&tf->refcount, dc_transfer_func_free);
248 }
249 
dc_create_transfer_func(void)250 struct dc_transfer_func *dc_create_transfer_func(void)
251 {
252 	struct dc_transfer_func *tf = kvzalloc(sizeof(*tf), GFP_KERNEL);
253 
254 	if (tf == NULL)
255 		goto alloc_fail;
256 
257 	kref_init(&tf->refcount);
258 
259 	return tf;
260 
261 alloc_fail:
262 	return NULL;
263 }
264 
265 #if defined(CONFIG_DRM_AMD_DC_DCN2_0)
dc_3dlut_func_free(struct kref * kref)266 static void dc_3dlut_func_free(struct kref *kref)
267 {
268 	struct dc_3dlut *lut = container_of(kref, struct dc_3dlut, refcount);
269 
270 	kvfree(lut);
271 }
272 
dc_create_3dlut_func(void)273 struct dc_3dlut *dc_create_3dlut_func(void)
274 {
275 	struct dc_3dlut *lut = kvzalloc(sizeof(*lut), GFP_KERNEL);
276 
277 	if (lut == NULL)
278 		goto alloc_fail;
279 
280 	kref_init(&lut->refcount);
281 	lut->state.raw = 0;
282 
283 	return lut;
284 
285 alloc_fail:
286 	return NULL;
287 
288 }
289 
dc_3dlut_func_release(struct dc_3dlut * lut)290 void dc_3dlut_func_release(struct dc_3dlut *lut)
291 {
292 	kref_put(&lut->refcount, dc_3dlut_func_free);
293 }
294 
dc_3dlut_func_retain(struct dc_3dlut * lut)295 void dc_3dlut_func_retain(struct dc_3dlut *lut)
296 {
297 	kref_get(&lut->refcount);
298 }
299 #endif
300 
301 
302