1/*
2 * Copyright 2019 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 "dmub_abm.h"
27#include "dmub_abm_lcd.h"
28#include "dc.h"
29#include "core_types.h"
30#include "dmub_cmd.h"
31
32#define TO_DMUB_ABM(abm)\
33 container_of(abm, struct dce_abm, base)
34
35#define ABM_FEATURE_NO_SUPPORT 0
36#define ABM_LCD_SUPPORT 1
37
38static unsigned int abm_feature_support(struct abm *abm, unsigned int panel_inst)
39{
40 struct dc_context *dc = abm->ctx;
41 struct dc_link *edp_links[MAX_NUM_EDP];
42 int i;
43 int edp_num;
44 unsigned int ret = ABM_FEATURE_NO_SUPPORT;
45
46 dc_get_edp_links(dc: dc->dc, edp_links, edp_num: &edp_num);
47
48 for (i = 0; i < edp_num; i++) {
49 if (panel_inst == i)
50 break;
51 }
52
53 if (i < edp_num) {
54 ret = ABM_LCD_SUPPORT;
55 }
56
57 return ret;
58}
59
60static void dmub_abm_init_ex(struct abm *abm, uint32_t backlight, uint32_t user_level)
61{
62 dmub_abm_init(abm, backlight, user_level);
63}
64
65static unsigned int dmub_abm_get_current_backlight_ex(struct abm *abm)
66{
67 dc_allow_idle_optimizations(dc: abm->ctx->dc, allow: false);
68
69 return dmub_abm_get_current_backlight(abm);
70}
71
72static unsigned int dmub_abm_get_target_backlight_ex(struct abm *abm)
73{
74 dc_allow_idle_optimizations(dc: abm->ctx->dc, allow: false);
75
76 return dmub_abm_get_target_backlight(abm);
77}
78
79static bool dmub_abm_set_level_ex(struct abm *abm, uint32_t level)
80{
81 bool ret = false;
82 unsigned int feature_support, i;
83 uint8_t panel_mask0 = 0;
84
85 for (i = 0; i < MAX_NUM_EDP; i++) {
86 feature_support = abm_feature_support(abm, panel_inst: i);
87
88 if (feature_support == ABM_LCD_SUPPORT)
89 panel_mask0 |= (0x01 << i);
90 }
91
92 if (panel_mask0)
93 ret = dmub_abm_set_level(abm, level, panel_mask: panel_mask0);
94
95 return ret;
96}
97
98static bool dmub_abm_init_config_ex(struct abm *abm,
99 const char *src,
100 unsigned int bytes,
101 unsigned int inst)
102{
103 unsigned int feature_support;
104
105 feature_support = abm_feature_support(abm, panel_inst: inst);
106
107 if (feature_support == ABM_LCD_SUPPORT)
108 dmub_abm_init_config(abm, src, bytes, inst);
109
110 return true;
111}
112
113static bool dmub_abm_set_pause_ex(struct abm *abm, bool pause, unsigned int panel_inst, unsigned int stream_inst)
114{
115 bool ret = false;
116 unsigned int feature_support;
117
118 feature_support = abm_feature_support(abm, panel_inst);
119
120 if (feature_support == ABM_LCD_SUPPORT)
121 ret = dmub_abm_set_pause(abm, pause, panel_inst, stream_inst);
122
123 return ret;
124}
125
126/*****************************************************************************
127 * dmub_abm_save_restore_ex() - calls dmub_abm_save_restore for preserving DMUB's
128 * Varibright states for LCD only. OLED is TBD
129 * @abm: used to check get dc context
130 * @panel_inst: panel instance index
131 * @pData: contains command to pause/un-pause abm and abm parameters
132 *
133 *
134 ***************************************************************************/
135static bool dmub_abm_save_restore_ex(
136 struct abm *abm,
137 unsigned int panel_inst,
138 struct abm_save_restore *pData)
139{
140 bool ret = false;
141 unsigned int feature_support;
142 struct dc_context *dc = abm->ctx;
143
144 feature_support = abm_feature_support(abm, panel_inst);
145
146 if (feature_support == ABM_LCD_SUPPORT)
147 ret = dmub_abm_save_restore(dc, panel_inst, pData);
148
149 return ret;
150}
151
152static bool dmub_abm_set_pipe_ex(struct abm *abm,
153 uint32_t otg_inst,
154 uint32_t option,
155 uint32_t panel_inst,
156 uint32_t pwrseq_inst)
157{
158 bool ret = false;
159 unsigned int feature_support;
160
161 feature_support = abm_feature_support(abm, panel_inst);
162
163 if (feature_support == ABM_LCD_SUPPORT)
164 ret = dmub_abm_set_pipe(abm, otg_inst, option, panel_inst, pwrseq_inst);
165
166 return ret;
167}
168
169static bool dmub_abm_set_backlight_level_pwm_ex(struct abm *abm,
170 unsigned int backlight_pwm_u16_16,
171 unsigned int frame_ramp,
172 unsigned int controller_id,
173 unsigned int panel_inst)
174{
175 bool ret = false;
176 unsigned int feature_support;
177
178 feature_support = abm_feature_support(abm, panel_inst);
179
180 if (feature_support == ABM_LCD_SUPPORT)
181 ret = dmub_abm_set_backlight_level(abm, backlight_pwm_u16_16, frame_ramp, panel_inst);
182
183 return ret;
184}
185
186static const struct abm_funcs abm_funcs = {
187 .abm_init = dmub_abm_init_ex,
188 .set_abm_level = dmub_abm_set_level_ex,
189 .get_current_backlight = dmub_abm_get_current_backlight_ex,
190 .get_target_backlight = dmub_abm_get_target_backlight_ex,
191 .init_abm_config = dmub_abm_init_config_ex,
192 .set_abm_pause = dmub_abm_set_pause_ex,
193 .save_restore = dmub_abm_save_restore_ex,
194 .set_pipe_ex = dmub_abm_set_pipe_ex,
195 .set_backlight_level_pwm = dmub_abm_set_backlight_level_pwm_ex,
196};
197
198static void dmub_abm_construct(
199 struct dce_abm *abm_dce,
200 struct dc_context *ctx,
201 const struct dce_abm_registers *regs,
202 const struct dce_abm_shift *abm_shift,
203 const struct dce_abm_mask *abm_mask)
204{
205 struct abm *base = &abm_dce->base;
206
207 base->ctx = ctx;
208 base->funcs = &abm_funcs;
209 base->dmcu_is_running = false;
210
211 abm_dce->regs = regs;
212 abm_dce->abm_shift = abm_shift;
213 abm_dce->abm_mask = abm_mask;
214}
215
216struct abm *dmub_abm_create(
217 struct dc_context *ctx,
218 const struct dce_abm_registers *regs,
219 const struct dce_abm_shift *abm_shift,
220 const struct dce_abm_mask *abm_mask)
221{
222 if (ctx->dc->caps.dmcub_support) {
223 struct dce_abm *abm_dce = kzalloc(size: sizeof(*abm_dce), GFP_KERNEL);
224
225 if (abm_dce == NULL) {
226 BREAK_TO_DEBUGGER();
227 return NULL;
228 }
229
230 dmub_abm_construct(abm_dce, ctx, regs, abm_shift, abm_mask);
231
232 return &abm_dce->base;
233 }
234 return NULL;
235}
236
237void dmub_abm_destroy(struct abm **abm)
238{
239 struct dce_abm *abm_dce = TO_DMUB_ABM(*abm);
240
241 kfree(objp: abm_dce);
242 *abm = NULL;
243}
244

source code of linux/drivers/gpu/drm/amd/display/dc/dce/dmub_abm.c