tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm/panel: samsung-s6e88a0-ams427ap24: Add brightness control
The tables for brightness to candela, aid and elvss were taken from downstream
kernel file "dsi_panel_S6E88A0_AMS427AP24_qhd_octa_video.dtsi" [1][2][3].
The gamma table gets generated in "ss_dsi_smart_dimming_S6E88A0_AMS427AP24.c" [4]
with hard-coded starting values. The function smart_dimming_init() [5] goes
through the v{*}_adjustments, generate_gray_scale and gamma_init procedure.
Instead of calculating it manually, it's easier to compile a custom downstream
kernel with SMART_DIMMING_DEBUG enabled and read out dmesg early at boot.
Selection of the values for aid and elvss are again according to downstream
file "dsi_panel_S6E88A0_AMS427AP24_qhd_octa_video.dtsi" [6][7].
The set of write commands is guided by downstream file "ss_dsi_panel_common.c" [8]
followed by "ss_dsi_panel_S6E88A0_AMS427AP24.c" [9].
The dsi mode flag MIPI_DSI_MODE_VIDEO_NO_HFP prevents screen flickering while
changing the brightness.
[1] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/drivers/video/msm/mdss/samsung/S6E88A0_AMS427AP24/dsi_panel_S6E88A0_AMS427AP24_qhd_octa_video.dtsi#L341-L397
[2] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/drivers/video/msm/mdss/samsung/S6E88A0_AMS427AP24/dsi_panel_S6E88A0_AMS427AP24_qhd_octa_video.dtsi#L214-L254
[3] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/drivers/video/msm/mdss/samsung/S6E88A0_AMS427AP24/dsi_panel_S6E88A0_AMS427AP24_qhd_octa_video.dtsi#L301-L320
[4] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/drivers/video/msm/mdss/samsung/S6E88A0_AMS427AP24/ss_dsi_smart_dimming_S6E88A0_AMS427AP24.c
[5] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/drivers/video/msm/mdss/samsung/S6E88A0_AMS427AP24/ss_dsi_smart_dimming_S6E88A0_AMS427AP24.c#L1816-L1900
[6] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/drivers/video/msm/mdss/samsung/S6E88A0_AMS427AP24/dsi_panel_S6E88A0_AMS427AP24_qhd_octa_video.dtsi#L256-L268
[7] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/drivers/video/msm/mdss/samsung/S6E88A0_AMS427AP24/dsi_panel_S6E88A0_AMS427AP24_qhd_octa_video.dtsi#L322-L334
[8] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/drivers/video/msm/mdss/samsung/ss_dsi_panel_common.c#L1389-L1517
[9] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/drivers/video/msm/mdss/samsung/S6E88A0_AMS427AP24/ss_dsi_panel_S6E88A0_AMS427AP24.c#L666-L678
Signed-off-by: Jakob Hauser <jahau@rocketmail.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/30c154954a4e0f75d90f6ef6f393a5ba8b3ffea9.1730070570.git.jahau@rocketmail.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/30c154954a4e0f75d90f6ef6f393a5ba8b3ffea9.1730070570.git.jahau@rocketmail.com
authored by
Jakob Hauser
and committed by
Neil Armstrong
5b67fdf1
d5658db2
+521
-12
+1
drivers/gpu/drm/panel/Kconfig
+1
drivers/gpu/drm/panel/Kconfig
···
636
636
tristate "Samsung AMS427AP24 panel with S6E88A0 controller"
637
637
depends on GPIOLIB && OF && REGULATOR
638
638
depends on DRM_MIPI_DSI
639
+
depends on BACKLIGHT_CLASS_DEVICE
639
640
help
640
641
Say Y here if you want to enable support for Samsung AMS427AP24 panel
641
642
with S6E88A0 controller (found in Samsung Galaxy S4 Mini Value Edition
+520
-12
drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams427ap24.c
+520
-12
drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams427ap24.c
···
4
4
* Copyright (c) 2024 Jakob Hauser <jahau@rocketmail.com>
5
5
*/
6
6
7
+
#include <linux/backlight.h>
7
8
#include <linux/delay.h>
8
9
#include <linux/gpio/consumer.h>
9
10
#include <linux/module.h>
···
17
16
#include <drm/drm_panel.h>
18
17
#include <drm/drm_probe_helper.h>
19
18
19
+
#define NUM_STEPS_CANDELA 54
20
+
#define NUM_STEPS_AID 39
21
+
#define NUM_STEPS_ELVSS 17
22
+
23
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/* length of the payload data, thereof fixed and variable */
24
+
#define FIX_LEN_AID 4
25
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#define FIX_LEN_ELVSS 2
26
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#define FIX_LEN_GAMMA 1
27
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#define VAR_LEN_AID 2
28
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#define VAR_LEN_ELVSS 1
29
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#define VAR_LEN_GAMMA 33
30
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#define LEN_AID (FIX_LEN_AID + VAR_LEN_AID)
31
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#define LEN_ELVSS (FIX_LEN_ELVSS + VAR_LEN_ELVSS)
32
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#define LEN_GAMMA (FIX_LEN_GAMMA + VAR_LEN_GAMMA)
33
+
20
34
struct s6e88a0_ams427ap24 {
21
35
struct drm_panel panel;
36
+
struct backlight_device *bl_dev;
22
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struct mipi_dsi_device *dsi;
23
38
struct regulator_bulk_data *supplies;
24
39
struct gpio_desc *reset_gpio;
···
51
34
return container_of(panel, struct s6e88a0_ams427ap24, panel);
52
35
}
53
36
37
+
enum candela {
38
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CANDELA_10CD, /* 0 */
39
+
CANDELA_11CD,
40
+
CANDELA_12CD,
41
+
CANDELA_13CD,
42
+
CANDELA_14CD,
43
+
CANDELA_15CD,
44
+
CANDELA_16CD,
45
+
CANDELA_17CD,
46
+
CANDELA_19CD,
47
+
CANDELA_20CD,
48
+
CANDELA_21CD,
49
+
CANDELA_22CD,
50
+
CANDELA_24CD,
51
+
CANDELA_25CD,
52
+
CANDELA_27CD,
53
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CANDELA_29CD,
54
+
CANDELA_30CD,
55
+
CANDELA_32CD,
56
+
CANDELA_34CD,
57
+
CANDELA_37CD,
58
+
CANDELA_39CD,
59
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CANDELA_41CD,
60
+
CANDELA_44CD,
61
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CANDELA_47CD,
62
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CANDELA_50CD,
63
+
CANDELA_53CD,
64
+
CANDELA_56CD,
65
+
CANDELA_60CD,
66
+
CANDELA_64CD,
67
+
CANDELA_68CD,
68
+
CANDELA_72CD,
69
+
CANDELA_77CD,
70
+
CANDELA_82CD,
71
+
CANDELA_87CD,
72
+
CANDELA_93CD,
73
+
CANDELA_98CD,
74
+
CANDELA_105CD,
75
+
CANDELA_111CD,
76
+
CANDELA_119CD,
77
+
CANDELA_126CD,
78
+
CANDELA_134CD,
79
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CANDELA_143CD,
80
+
CANDELA_152CD,
81
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CANDELA_162CD,
82
+
CANDELA_172CD,
83
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CANDELA_183CD,
84
+
CANDELA_195CD,
85
+
CANDELA_207CD,
86
+
CANDELA_220CD,
87
+
CANDELA_234CD,
88
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CANDELA_249CD,
89
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CANDELA_265CD,
90
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CANDELA_282CD,
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CANDELA_300CD, /* 53 */
92
+
};
93
+
94
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static const int s6e88a0_ams427ap24_br_to_cd[NUM_STEPS_CANDELA] = {
95
+
/* columns: brightness from, brightness till, candela */
96
+
/* 0 */ 10, /* 10CD */
97
+
/* 11 */ 11, /* 11CD */
98
+
/* 12 */ 12, /* 12CD */
99
+
/* 13 */ 13, /* 13CD */
100
+
/* 14 */ 14, /* 14CD */
101
+
/* 15 */ 15, /* 15CD */
102
+
/* 16 */ 16, /* 16CD */
103
+
/* 17 */ 17, /* 17CD */
104
+
/* 18 */ 18, /* 19CD */
105
+
/* 19 */ 19, /* 20CD */
106
+
/* 20 */ 20, /* 21CD */
107
+
/* 21 */ 21, /* 22CD */
108
+
/* 22 */ 22, /* 24CD */
109
+
/* 23 */ 23, /* 25CD */
110
+
/* 24 */ 24, /* 27CD */
111
+
/* 25 */ 25, /* 29CD */
112
+
/* 26 */ 26, /* 30CD */
113
+
/* 27 */ 27, /* 32CD */
114
+
/* 28 */ 28, /* 34CD */
115
+
/* 29 */ 29, /* 37CD */
116
+
/* 30 */ 30, /* 39CD */
117
+
/* 31 */ 32, /* 41CD */
118
+
/* 33 */ 34, /* 44CD */
119
+
/* 35 */ 36, /* 47CD */
120
+
/* 37 */ 38, /* 50CD */
121
+
/* 39 */ 40, /* 53CD */
122
+
/* 41 */ 43, /* 56CD */
123
+
/* 44 */ 46, /* 60CD */
124
+
/* 47 */ 49, /* 64CD */
125
+
/* 50 */ 52, /* 68CD */
126
+
/* 53 */ 56, /* 72CD */
127
+
/* 57 */ 59, /* 77CD */
128
+
/* 60 */ 63, /* 82CD */
129
+
/* 64 */ 67, /* 87CD */
130
+
/* 68 */ 71, /* 93CD */
131
+
/* 72 */ 76, /* 98CD */
132
+
/* 77 */ 80, /* 105CD */
133
+
/* 81 */ 86, /* 111CD */
134
+
/* 87 */ 91, /* 119CD */
135
+
/* 92 */ 97, /* 126CD */
136
+
/* 98 */ 104, /* 134CD */
137
+
/* 105 */ 110, /* 143CD */
138
+
/* 111 */ 118, /* 152CD */
139
+
/* 119 */ 125, /* 162CD */
140
+
/* 126 */ 133, /* 172CD */
141
+
/* 134 */ 142, /* 183CD */
142
+
/* 143 */ 150, /* 195CD */
143
+
/* 151 */ 160, /* 207CD */
144
+
/* 161 */ 170, /* 220CD */
145
+
/* 171 */ 181, /* 234CD */
146
+
/* 182 */ 205, /* 249CD */
147
+
/* 206 */ 234, /* 265CD */
148
+
/* 235 */ 254, /* 282CD */
149
+
/* 255 */ 255, /* 300CD */
150
+
};
151
+
152
+
static const u8 s6e88a0_ams427ap24_aid[NUM_STEPS_AID][VAR_LEN_AID] = {
153
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{ 0x03, 0x77 }, /* AOR 90.9%, 10CD */
154
+
{ 0x03, 0x73 }, /* AOR 90.5%, 11CD */
155
+
{ 0x03, 0x69 }, /* AOR 89.4%, 12CD */
156
+
{ 0x03, 0x65 }, /* AOR 89.0%, 13CD */
157
+
{ 0x03, 0x61 }, /* AOR 88.6%, 14CD */
158
+
{ 0x03, 0x55 }, /* AOR 87.4%, 15CD */
159
+
{ 0x03, 0x50 }, /* AOR 86.9%, 16CD */
160
+
{ 0x03, 0x45 }, /* AOR 85.8%, 17CD */
161
+
{ 0x03, 0x35 }, /* AOR 84.1%, 19CD */
162
+
{ 0x03, 0x27 }, /* AOR 82.7%, 20CD */
163
+
{ 0x03, 0x23 }, /* AOR 82.3%, 21CD */
164
+
{ 0x03, 0x17 }, /* AOR 81.0%, 22CD */
165
+
{ 0x03, 0x11 }, /* AOR 80.4%, 24CD */
166
+
{ 0x03, 0x04 }, /* AOR 79.1%, 25CD */
167
+
{ 0x02, 0xf4 }, /* AOR 77.5%, 27CD */
168
+
{ 0x02, 0xe3 }, /* AOR 75.7%, 29CD */
169
+
{ 0x02, 0xd7 }, /* AOR 74.5%, 30CD */
170
+
{ 0x02, 0xc6 }, /* AOR 72.7%, 32CD */
171
+
{ 0x02, 0xb7 }, /* AOR 71.2%, 34CD */
172
+
{ 0x02, 0xa1 }, /* AOR 69.0%, 37CD */
173
+
{ 0x02, 0x91 }, /* AOR 67.3%, 39CD */
174
+
{ 0x02, 0x78 }, /* AOR 64.8%, 41CD */
175
+
{ 0x02, 0x62 }, /* AOR 62.5%, 44CD */
176
+
{ 0x02, 0x45 }, /* AOR 59.5%, 47CD */
177
+
{ 0x02, 0x30 }, /* AOR 57.4%, 50CD */
178
+
{ 0x02, 0x13 }, /* AOR 54.4%, 53CD */
179
+
{ 0x01, 0xf5 }, /* AOR 51.3%, 56CD */
180
+
{ 0x01, 0xd3 }, /* AOR 47.8%, 60CD */
181
+
{ 0x01, 0xb1 }, /* AOR 44.4%, 64CD */
182
+
{ 0x01, 0x87 }, /* AOR 40.1%, 68CD */
183
+
{ 0x01, 0x63 }, /* AOR 36.6%, 72CD */
184
+
{ 0x01, 0x35 }, /* AOR 31.7%, 77CD */
185
+
{ 0x01, 0x05 }, /* AOR 26.9%, 82CD */
186
+
{ 0x00, 0xd5 }, /* AOR 21.8%, 87CD */
187
+
{ 0x00, 0xa1 }, /* AOR 16.5%, 93CD */
188
+
{ 0x00, 0x6f }, /* AOR 11.4%, 98CD */
189
+
{ 0x00, 0x31 }, /* AOR 5.0%, 105CD */
190
+
{ 0x01, 0x86 }, /* AOR 40.0%, 111CD ~ 172CD */
191
+
{ 0x00, 0x08 }, /* AOR 0.6%, 183CD ~ 300CD */
192
+
};
193
+
194
+
static const u8 s6e88a0_ams427ap24_elvss[NUM_STEPS_ELVSS][VAR_LEN_ELVSS] = {
195
+
{ 0x14 }, /* 10CD ~ 111CD */
196
+
{ 0x13 }, /* 119CD */
197
+
{ 0x12 }, /* 126CD */
198
+
{ 0x12 }, /* 134CD */
199
+
{ 0x11 }, /* 143CD */
200
+
{ 0x10 }, /* 152CD */
201
+
{ 0x0f }, /* 162CD */
202
+
{ 0x0e }, /* 172CD */
203
+
{ 0x11 }, /* 183CD */
204
+
{ 0x11 }, /* 195CD */
205
+
{ 0x10 }, /* 207CD */
206
+
{ 0x0f }, /* 220CD */
207
+
{ 0x0f }, /* 234CD */
208
+
{ 0x0e }, /* 249CD */
209
+
{ 0x0d }, /* 265CD */
210
+
{ 0x0c }, /* 282CD */
211
+
{ 0x0b }, /* 300CD */
212
+
};
213
+
214
+
static const u8 s6e88a0_ams427ap24_gamma[NUM_STEPS_CANDELA][VAR_LEN_GAMMA] = {
215
+
/* 10CD */
216
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x8a, 0x8c, 0x8b,
217
+
0x8c, 0x87, 0x89, 0x89, 0x88, 0x87, 0x8c, 0x80, 0x82, 0x88, 0x7b,
218
+
0x72, 0x8c, 0x60, 0x68, 0x8c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
219
+
/* 11CD */
220
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x8a, 0x8c, 0x8b,
221
+
0x8c, 0x87, 0x89, 0x89, 0x88, 0x87, 0x8c, 0x80, 0x82, 0x88, 0x7b,
222
+
0x72, 0x8c, 0x60, 0x68, 0x8c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
223
+
/* 12CD */
224
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x8a, 0x8b, 0x8b,
225
+
0x8c, 0x88, 0x89, 0x8a, 0x88, 0x87, 0x8c, 0x81, 0x82, 0x87, 0x7a,
226
+
0x72, 0x8b, 0x60, 0x68, 0x8c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
227
+
/* 13CD */
228
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x8a, 0x8b, 0x8b,
229
+
0x8c, 0x88, 0x89, 0x8a, 0x88, 0x87, 0x8c, 0x81, 0x82, 0x87, 0x7a,
230
+
0x72, 0x8b, 0x61, 0x69, 0x8c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
231
+
/* 14CD */
232
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8c, 0x8b,
233
+
0x8c, 0x88, 0x89, 0x8a, 0x87, 0x86, 0x8a, 0x82, 0x82, 0x87, 0x79,
234
+
0x71, 0x89, 0x63, 0x6c, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
235
+
/* 15CD */
236
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x8a, 0x8c, 0x8c,
237
+
0x8c, 0x86, 0x87, 0x88, 0x85, 0x85, 0x8a, 0x83, 0x83, 0x88, 0x78,
238
+
0x72, 0x89, 0x64, 0x6c, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
239
+
/* 16CD */
240
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8c, 0x8b,
241
+
0x8c, 0x86, 0x88, 0x88, 0x86, 0x86, 0x8a, 0x84, 0x84, 0x88, 0x78,
242
+
0x72, 0x89, 0x5d, 0x67, 0x8b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
243
+
/* 17CD */
244
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
245
+
0x8b, 0x87, 0x89, 0x89, 0x86, 0x86, 0x8a, 0x84, 0x83, 0x87, 0x78,
246
+
0x73, 0x89, 0x64, 0x6e, 0x8e, 0x38, 0x32, 0x24, 0x00, 0x00, 0x00 },
247
+
/* 19CD */
248
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
249
+
0x8b, 0x87, 0x89, 0x89, 0x86, 0x86, 0x89, 0x84, 0x84, 0x87, 0x77,
250
+
0x72, 0x88, 0x65, 0x6f, 0x8e, 0x38, 0x32, 0x24, 0x00, 0x00, 0x00 },
251
+
/* 20CD */
252
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
253
+
0x8b, 0x88, 0x89, 0x89, 0x85, 0x85, 0x88, 0x82, 0x83, 0x85, 0x79,
254
+
0x73, 0x88, 0x65, 0x6f, 0x8e, 0x38, 0x32, 0x24, 0x00, 0x00, 0x00 },
255
+
/* 21CD */
256
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
257
+
0x8b, 0x88, 0x89, 0x89, 0x85, 0x85, 0x88, 0x82, 0x83, 0x85, 0x79,
258
+
0x74, 0x88, 0x65, 0x6f, 0x8e, 0x38, 0x32, 0x24, 0x00, 0x00, 0x00 },
259
+
/* 22CD */
260
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8c, 0x8b,
261
+
0x8c, 0x86, 0x88, 0x87, 0x86, 0x86, 0x89, 0x82, 0x83, 0x85, 0x7c,
262
+
0x75, 0x87, 0x65, 0x6f, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
263
+
/* 24CD */
264
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8c, 0x8b,
265
+
0x8c, 0x86, 0x88, 0x87, 0x86, 0x86, 0x89, 0x82, 0x83, 0x85, 0x7c,
266
+
0x76, 0x86, 0x66, 0x6f, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
267
+
/* 25CD */
268
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
269
+
0x8b, 0x86, 0x89, 0x88, 0x87, 0x87, 0x89, 0x82, 0x82, 0x84, 0x7f,
270
+
0x7a, 0x89, 0x6b, 0x73, 0x8f, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
271
+
/* 27CD */
272
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
273
+
0x8b, 0x86, 0x89, 0x88, 0x87, 0x87, 0x89, 0x82, 0x82, 0x84, 0x7f,
274
+
0x7a, 0x89, 0x6b, 0x73, 0x8f, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
275
+
/* 29CD */
276
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
277
+
0x8b, 0x86, 0x89, 0x88, 0x85, 0x84, 0x87, 0x84, 0x85, 0x86, 0x80,
278
+
0x7b, 0x88, 0x6a, 0x73, 0x8f, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
279
+
/* 30CD */
280
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
281
+
0x8b, 0x86, 0x89, 0x88, 0x85, 0x84, 0x87, 0x84, 0x85, 0x86, 0x80,
282
+
0x7b, 0x88, 0x6a, 0x73, 0x8f, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
283
+
/* 32CD */
284
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
285
+
0x8b, 0x86, 0x89, 0x88, 0x85, 0x84, 0x87, 0x84, 0x85, 0x86, 0x80,
286
+
0x7b, 0x88, 0x6a, 0x73, 0x8f, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
287
+
/* 34CD */
288
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
289
+
0x8b, 0x86, 0x89, 0x88, 0x85, 0x84, 0x87, 0x83, 0x84, 0x84, 0x7f,
290
+
0x79, 0x86, 0x6c, 0x76, 0x91, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
291
+
/* 37CD */
292
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8b,
293
+
0x8b, 0x86, 0x88, 0x88, 0x87, 0x86, 0x87, 0x83, 0x84, 0x84, 0x7f,
294
+
0x79, 0x86, 0x6c, 0x76, 0x90, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
295
+
/* 39CD */
296
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8b,
297
+
0x8b, 0x86, 0x88, 0x87, 0x84, 0x84, 0x86, 0x83, 0x85, 0x85, 0x80,
298
+
0x79, 0x85, 0x6c, 0x76, 0x90, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
299
+
/* 41CD */
300
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8b,
301
+
0x8b, 0x86, 0x88, 0x87, 0x84, 0x84, 0x86, 0x81, 0x84, 0x83, 0x7f,
302
+
0x79, 0x84, 0x6e, 0x79, 0x93, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
303
+
/* 44CD */
304
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8b,
305
+
0x8b, 0x86, 0x88, 0x87, 0x84, 0x84, 0x86, 0x81, 0x84, 0x83, 0x7f,
306
+
0x79, 0x84, 0x6e, 0x79, 0x92, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
307
+
/* 47CD */
308
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8b,
309
+
0x8b, 0x86, 0x88, 0x87, 0x84, 0x85, 0x86, 0x81, 0x84, 0x83, 0x7f,
310
+
0x79, 0x83, 0x6f, 0x79, 0x91, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
311
+
/* 50CD */
312
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8b,
313
+
0x8b, 0x86, 0x88, 0x87, 0x84, 0x85, 0x86, 0x82, 0x84, 0x83, 0x7f,
314
+
0x79, 0x83, 0x6f, 0x79, 0x90, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
315
+
/* 53CD */
316
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8b,
317
+
0x8b, 0x86, 0x88, 0x87, 0x83, 0x83, 0x85, 0x84, 0x85, 0x85, 0x7f,
318
+
0x79, 0x83, 0x70, 0x79, 0x8f, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
319
+
/* 56CD */
320
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8a,
321
+
0x8a, 0x87, 0x89, 0x87, 0x83, 0x83, 0x85, 0x84, 0x85, 0x84, 0x7f,
322
+
0x79, 0x82, 0x70, 0x7a, 0x8e, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
323
+
/* 60CD */
324
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8a,
325
+
0x8a, 0x87, 0x89, 0x87, 0x83, 0x83, 0x85, 0x84, 0x85, 0x84, 0x7e,
326
+
0x79, 0x82, 0x71, 0x7a, 0x8d, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
327
+
/* 64CD */
328
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8a,
329
+
0x8a, 0x86, 0x88, 0x86, 0x84, 0x84, 0x86, 0x82, 0x83, 0x82, 0x80,
330
+
0x7a, 0x84, 0x71, 0x7a, 0x8c, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
331
+
/* 68CD */
332
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8a, 0x89, 0x89, 0x8c, 0x8a,
333
+
0x8a, 0x86, 0x88, 0x86, 0x84, 0x84, 0x86, 0x82, 0x84, 0x82, 0x81,
334
+
0x7b, 0x83, 0x72, 0x7b, 0x8b, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
335
+
/* 72CD */
336
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8a, 0x89, 0x89, 0x8c, 0x8a,
337
+
0x8a, 0x86, 0x88, 0x86, 0x85, 0x85, 0x86, 0x82, 0x84, 0x82, 0x81,
338
+
0x7b, 0x83, 0x72, 0x7c, 0x8a, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
339
+
/* 77CD */
340
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8a, 0x89, 0x89, 0x8c, 0x8a,
341
+
0x8a, 0x85, 0x87, 0x85, 0x85, 0x87, 0x87, 0x82, 0x84, 0x82, 0x81,
342
+
0x7c, 0x82, 0x72, 0x7c, 0x89, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
343
+
/* 82CD */
344
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8a, 0x89, 0x89, 0x8c, 0x8a,
345
+
0x8a, 0x85, 0x87, 0x85, 0x85, 0x87, 0x87, 0x82, 0x84, 0x82, 0x81,
346
+
0x7c, 0x82, 0x73, 0x7c, 0x88, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
347
+
/* 87CD */
348
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8a, 0x89, 0x89, 0x8c, 0x8a,
349
+
0x8a, 0x85, 0x87, 0x85, 0x84, 0x84, 0x86, 0x80, 0x84, 0x81, 0x80,
350
+
0x7a, 0x82, 0x76, 0x7f, 0x89, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
351
+
/* 93CD */
352
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8a, 0x89, 0x89, 0x8b, 0x8a,
353
+
0x8a, 0x86, 0x87, 0x85, 0x84, 0x85, 0x86, 0x80, 0x84, 0x80, 0x80,
354
+
0x7a, 0x82, 0x76, 0x80, 0x88, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
355
+
/* 98CD */
356
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8a, 0x89, 0x89, 0x8b, 0x8a,
357
+
0x8a, 0x86, 0x87, 0x85, 0x85, 0x85, 0x86, 0x80, 0x84, 0x80, 0x80,
358
+
0x7a, 0x82, 0x76, 0x80, 0x88, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
359
+
/* 105CD */
360
+
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x89, 0x88, 0x88, 0x8b, 0x8a,
361
+
0x8a, 0x84, 0x87, 0x85, 0x85, 0x85, 0x85, 0x80, 0x84, 0x80, 0x7f,
362
+
0x79, 0x81, 0x71, 0x7d, 0x87, 0x38, 0x32, 0x24, 0x00, 0x00, 0x00 },
363
+
/* 111CD */
364
+
{ 0x00, 0xdf, 0x00, 0xde, 0x00, 0xde, 0x85, 0x85, 0x84, 0x87, 0x86,
365
+
0x87, 0x85, 0x86, 0x85, 0x83, 0x83, 0x83, 0x81, 0x82, 0x82, 0x80,
366
+
0x7d, 0x82, 0x75, 0x7f, 0x86, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
367
+
/* 119CD */
368
+
{ 0x00, 0xe3, 0x00, 0xe1, 0x00, 0xe2, 0x85, 0x85, 0x84, 0x86, 0x85,
369
+
0x85, 0x84, 0x85, 0x84, 0x83, 0x83, 0x83, 0x82, 0x82, 0x82, 0x7e,
370
+
0x7b, 0x81, 0x75, 0x7f, 0x86, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
371
+
/* 126CD */
372
+
{ 0x00, 0xe6, 0x00, 0xe5, 0x00, 0xe5, 0x85, 0x84, 0x84, 0x85, 0x85,
373
+
0x85, 0x84, 0x84, 0x84, 0x82, 0x83, 0x83, 0x80, 0x81, 0x81, 0x80,
374
+
0x7f, 0x83, 0x73, 0x7c, 0x84, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
375
+
/* 134CD */
376
+
{ 0x00, 0xe9, 0x00, 0xe8, 0x00, 0xe8, 0x84, 0x84, 0x83, 0x85, 0x85,
377
+
0x85, 0x84, 0x84, 0x83, 0x81, 0x82, 0x82, 0x81, 0x81, 0x81, 0x7f,
378
+
0x7d, 0x81, 0x73, 0x7c, 0x83, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
379
+
/* 143CD */
380
+
{ 0x00, 0xed, 0x00, 0xec, 0x00, 0xec, 0x84, 0x83, 0x83, 0x84, 0x84,
381
+
0x84, 0x84, 0x84, 0x83, 0x82, 0x83, 0x83, 0x81, 0x80, 0x81, 0x7f,
382
+
0x7e, 0x81, 0x70, 0x79, 0x81, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
383
+
/* 152CD */
384
+
{ 0x00, 0xf0, 0x00, 0xf0, 0x00, 0xf0, 0x83, 0x83, 0x83, 0x83, 0x83,
385
+
0x83, 0x84, 0x84, 0x83, 0x81, 0x81, 0x81, 0x80, 0x80, 0x81, 0x80,
386
+
0x80, 0x82, 0x6f, 0x78, 0x7f, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
387
+
/* 162CD */
388
+
{ 0x00, 0xf4, 0x00, 0xf3, 0x00, 0xf4, 0x83, 0x83, 0x83, 0x83, 0x83,
389
+
0x83, 0x82, 0x81, 0x81, 0x81, 0x81, 0x81, 0x80, 0x80, 0x81, 0x80,
390
+
0x7f, 0x82, 0x6f, 0x78, 0x7f, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
391
+
/* 172CD */
392
+
{ 0x00, 0xf8, 0x00, 0xf8, 0x00, 0xf8, 0x82, 0x82, 0x82, 0x82, 0x82,
393
+
0x82, 0x82, 0x81, 0x81, 0x80, 0x81, 0x80, 0x80, 0x80, 0x81, 0x81,
394
+
0x80, 0x83, 0x6d, 0x76, 0x7d, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
395
+
/* 183CD */
396
+
{ 0x00, 0xe0, 0x00, 0xdf, 0x00, 0xdf, 0x84, 0x84, 0x83, 0x86, 0x86,
397
+
0x86, 0x83, 0x84, 0x83, 0x82, 0x82, 0x82, 0x81, 0x83, 0x81, 0x81,
398
+
0x7e, 0x81, 0x80, 0x82, 0x84, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
399
+
/* 195CD */
400
+
{ 0x00, 0xe4, 0x00, 0xe3, 0x00, 0xe3, 0x84, 0x83, 0x83, 0x85, 0x85,
401
+
0x85, 0x83, 0x84, 0x83, 0x81, 0x82, 0x82, 0x82, 0x83, 0x81, 0x81,
402
+
0x80, 0x82, 0x7d, 0x7f, 0x81, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
403
+
/* 207CD */
404
+
{ 0x00, 0xe7, 0x00, 0xe6, 0x00, 0xe6, 0x83, 0x82, 0x82, 0x85, 0x85,
405
+
0x85, 0x82, 0x83, 0x83, 0x82, 0x82, 0x82, 0x80, 0x81, 0x80, 0x81,
406
+
0x80, 0x82, 0x7d, 0x7f, 0x81, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
407
+
/* 220CD */
408
+
{ 0x00, 0xeb, 0x00, 0xea, 0x00, 0xea, 0x83, 0x83, 0x82, 0x84, 0x84,
409
+
0x84, 0x82, 0x83, 0x82, 0x81, 0x81, 0x82, 0x81, 0x82, 0x81, 0x80,
410
+
0x7e, 0x80, 0x7d, 0x7f, 0x81, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
411
+
/* 234CD */
412
+
{ 0x00, 0xef, 0x00, 0xee, 0x00, 0xee, 0x83, 0x82, 0x82, 0x83, 0x83,
413
+
0x83, 0x82, 0x82, 0x82, 0x81, 0x81, 0x81, 0x80, 0x80, 0x80, 0x80,
414
+
0x80, 0x81, 0x7b, 0x7c, 0x7f, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
415
+
/* 249CD */
416
+
{ 0x00, 0xf3, 0x00, 0xf2, 0x00, 0xf2, 0x82, 0x81, 0x81, 0x83, 0x83,
417
+
0x83, 0x82, 0x82, 0x82, 0x81, 0x81, 0x81, 0x80, 0x81, 0x80, 0x7f,
418
+
0x7e, 0x7f, 0x7b, 0x7c, 0x7f, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
419
+
/* 265CD */
420
+
{ 0x00, 0xf7, 0x00, 0xf7, 0x00, 0xf7, 0x81, 0x81, 0x80, 0x82, 0x82,
421
+
0x82, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x81, 0x80, 0x7f,
422
+
0x7e, 0x7f, 0x7b, 0x7c, 0x7f, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
423
+
/* 282CD */
424
+
{ 0x00, 0xfb, 0x00, 0xfb, 0x00, 0xfb, 0x80, 0x80, 0x80, 0x81, 0x81,
425
+
0x81, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x7f, 0x7f, 0x7f, 0x7f,
426
+
0x7f, 0x7f, 0x78, 0x79, 0x7d, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
427
+
/* 300CD */
428
+
{ 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80,
429
+
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
430
+
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00 },
431
+
};
432
+
433
+
static int s6e88a0_ams427ap24_set_brightness(struct backlight_device *bd)
434
+
{
435
+
struct s6e88a0_ams427ap24 *ctx = bl_get_data(bd);
436
+
struct mipi_dsi_device *dsi = ctx->dsi;
437
+
struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
438
+
struct device *dev = &dsi->dev;
439
+
int brightness = bd->props.brightness;
440
+
int candela_enum;
441
+
u8 b2[LEN_AID] = { 0xb2, 0x40, 0x08, 0x20, 0x00, 0x00 };
442
+
u8 b6[LEN_ELVSS] = { 0xb6, 0x28, 0x00 };
443
+
u8 ca[LEN_GAMMA];
444
+
445
+
/* get candela enum from brightness */
446
+
for (candela_enum = 0; candela_enum < NUM_STEPS_CANDELA; candela_enum++)
447
+
if (brightness <= s6e88a0_ams427ap24_br_to_cd[candela_enum])
448
+
break;
449
+
450
+
/* get aid */
451
+
switch (candela_enum) {
452
+
case CANDELA_10CD ... CANDELA_105CD:
453
+
memcpy(&b2[FIX_LEN_AID],
454
+
s6e88a0_ams427ap24_aid[candela_enum],
455
+
VAR_LEN_AID);
456
+
break;
457
+
case CANDELA_111CD ... CANDELA_172CD:
458
+
memcpy(&b2[FIX_LEN_AID],
459
+
s6e88a0_ams427ap24_aid[CANDELA_111CD],
460
+
VAR_LEN_AID);
461
+
break;
462
+
case CANDELA_183CD ... CANDELA_300CD:
463
+
memcpy(&b2[FIX_LEN_AID],
464
+
s6e88a0_ams427ap24_aid[CANDELA_111CD + 1],
465
+
VAR_LEN_AID);
466
+
break;
467
+
default:
468
+
dev_err(dev, "Failed to get aid data\n");
469
+
return -EINVAL;
470
+
}
471
+
472
+
/* get elvss */
473
+
if (candela_enum <= CANDELA_111CD) {
474
+
memcpy(&b6[FIX_LEN_ELVSS],
475
+
s6e88a0_ams427ap24_elvss[0],
476
+
VAR_LEN_ELVSS);
477
+
} else {
478
+
memcpy(&b6[FIX_LEN_ELVSS],
479
+
s6e88a0_ams427ap24_elvss[candela_enum - CANDELA_111CD],
480
+
VAR_LEN_ELVSS);
481
+
}
482
+
483
+
/* get gamma */
484
+
ca[0] = 0xca;
485
+
memcpy(&ca[FIX_LEN_GAMMA],
486
+
s6e88a0_ams427ap24_gamma[candela_enum],
487
+
VAR_LEN_GAMMA);
488
+
489
+
/* write data */
490
+
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0x5a, 0x5a); // level 1 key on
491
+
mipi_dsi_dcs_write_buffer_multi(&dsi_ctx, b2, ARRAY_SIZE(b2)); // set aid
492
+
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x55, 0x00); // acl off
493
+
mipi_dsi_dcs_write_buffer_multi(&dsi_ctx, b6, ARRAY_SIZE(b6)); // set elvss
494
+
mipi_dsi_dcs_write_buffer_multi(&dsi_ctx, ca, ARRAY_SIZE(ca)); // set gamma
495
+
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf7, 0x03); // gamma update
496
+
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0xa5, 0xa5); // level 1 key off
497
+
498
+
return dsi_ctx.accum_err;
499
+
}
500
+
54
501
static void s6e88a0_ams427ap24_reset(struct s6e88a0_ams427ap24 *ctx)
55
502
{
56
503
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
···
529
48
{
530
49
struct mipi_dsi_device *dsi = ctx->dsi;
531
50
struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
51
+
struct device *dev = &dsi->dev;
52
+
int ret;
532
53
533
54
dsi->mode_flags |= MIPI_DSI_MODE_LPM;
534
55
···
550
67
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xcc, 0x4c); // pixel clock divider pol.
551
68
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf2, 0x03, 0x0d); // unknown
552
69
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf1, 0xa5, 0xa5); // level 3 key off
553
-
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xca,
554
-
0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x80,
555
-
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
556
-
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
557
-
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
558
-
0x80, 0x80, 0x00, 0x00, 0x00); // set gamma
559
-
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb2,
560
-
0x40, 0x08, 0x20, 0x00, 0x08); // set aid
561
-
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb6, 0x28, 0x0b); // set elvss
562
-
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf7, 0x03); // gamma update
563
-
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x55, 0x00); // acl off
564
70
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0xa5, 0xa5); // level 1 key off
565
71
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfc, 0xa5, 0xa5); // level 2 key off
72
+
73
+
ret = s6e88a0_ams427ap24_set_brightness(ctx->bl_dev);
74
+
if (ret < 0) {
75
+
dev_err(dev, "Failed to set brightness: %d\n", ret);
76
+
return ret;
77
+
}
566
78
567
79
mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
568
80
···
650
172
.get_modes = s6e88a0_ams427ap24_get_modes,
651
173
};
652
174
175
+
static const struct backlight_ops s6e88a0_ams427ap24_bl_ops = {
176
+
.update_status = s6e88a0_ams427ap24_set_brightness,
177
+
};
178
+
179
+
static int s6e88a0_ams427ap24_register_backlight(struct s6e88a0_ams427ap24 *ctx)
180
+
{
181
+
struct backlight_properties props = {
182
+
.type = BACKLIGHT_RAW,
183
+
.brightness = 180,
184
+
.max_brightness = 255,
185
+
};
186
+
struct mipi_dsi_device *dsi = ctx->dsi;
187
+
struct device *dev = &dsi->dev;
188
+
int ret = 0;
189
+
190
+
ctx->bl_dev = devm_backlight_device_register(dev, dev_name(dev), dev, ctx,
191
+
&s6e88a0_ams427ap24_bl_ops,
192
+
&props);
193
+
if (IS_ERR(ctx->bl_dev)) {
194
+
ret = PTR_ERR(ctx->bl_dev);
195
+
dev_err(dev, "error registering backlight device (%d)\n", ret);
196
+
}
197
+
198
+
return ret;
199
+
}
200
+
653
201
static int s6e88a0_ams427ap24_probe(struct mipi_dsi_device *dsi)
654
202
{
655
203
struct device *dev = &dsi->dev;
···
704
200
dsi->lanes = 2;
705
201
dsi->format = MIPI_DSI_FMT_RGB888;
706
202
dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
707
-
MIPI_DSI_MODE_NO_EOT_PACKET;
203
+
MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_MODE_VIDEO_NO_HFP;
708
204
709
205
drm_panel_init(&ctx->panel, dev, &s6e88a0_ams427ap24_panel_funcs,
710
206
DRM_MODE_CONNECTOR_DSI);
711
207
ctx->panel.prepare_prev_first = true;
208
+
209
+
ret = s6e88a0_ams427ap24_register_backlight(ctx);
210
+
if (ret < 0)
211
+
return ret;
712
212
713
213
drm_panel_add(&ctx->panel);
714
214