1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (C) 2017-2018, Bootlin
4  */
5 
6 #include <linux/delay.h>
7 #include <linux/device.h>
8 #include <linux/err.h>
9 #include <linux/errno.h>
10 #include <linux/fb.h>
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/of_device.h>
14 
15 #include <linux/gpio/consumer.h>
16 #include <linux/regulator/consumer.h>
17 
18 #include <drm/drm_mipi_dsi.h>
19 #include <drm/drm_modes.h>
20 #include <drm/drm_panel.h>
21 
22 #include <video/mipi_display.h>
23 
24 enum ili9881c_op {
25 	ILI9881C_SWITCH_PAGE,
26 	ILI9881C_COMMAND,
27 };
28 
29 struct ili9881c_instr {
30 	enum ili9881c_op	op;
31 
32 	union arg {
33 		struct cmd {
34 			u8	cmd;
35 			u8	data;
36 		} cmd;
37 		u8	page;
38 	} arg;
39 };
40 
41 struct ili9881c_desc {
42 	const struct ili9881c_instr *init;
43 	const size_t init_length;
44 	const struct drm_display_mode *mode;
45 	const unsigned long mode_flags;
46 };
47 
48 struct ili9881c {
49 	struct drm_panel	panel;
50 	struct mipi_dsi_device	*dsi;
51 	const struct ili9881c_desc	*desc;
52 
53 	struct regulator	*power;
54 	struct gpio_desc	*reset;
55 
56 	enum drm_panel_orientation	orientation;
57 };
58 
59 #define ILI9881C_SWITCH_PAGE_INSTR(_page)	\
60 	{					\
61 		.op = ILI9881C_SWITCH_PAGE,	\
62 		.arg = {			\
63 			.page = (_page),	\
64 		},				\
65 	}
66 
67 #define ILI9881C_COMMAND_INSTR(_cmd, _data)		\
68 	{						\
69 		.op = ILI9881C_COMMAND,		\
70 		.arg = {				\
71 			.cmd = {			\
72 				.cmd = (_cmd),		\
73 				.data = (_data),	\
74 			},				\
75 		},					\
76 	}
77 
78 static const struct ili9881c_instr lhr050h41_init[] = {
79 	ILI9881C_SWITCH_PAGE_INSTR(3),
80 	ILI9881C_COMMAND_INSTR(0x01, 0x00),
81 	ILI9881C_COMMAND_INSTR(0x02, 0x00),
82 	ILI9881C_COMMAND_INSTR(0x03, 0x73),
83 	ILI9881C_COMMAND_INSTR(0x04, 0x03),
84 	ILI9881C_COMMAND_INSTR(0x05, 0x00),
85 	ILI9881C_COMMAND_INSTR(0x06, 0x06),
86 	ILI9881C_COMMAND_INSTR(0x07, 0x06),
87 	ILI9881C_COMMAND_INSTR(0x08, 0x00),
88 	ILI9881C_COMMAND_INSTR(0x09, 0x18),
89 	ILI9881C_COMMAND_INSTR(0x0a, 0x04),
90 	ILI9881C_COMMAND_INSTR(0x0b, 0x00),
91 	ILI9881C_COMMAND_INSTR(0x0c, 0x02),
92 	ILI9881C_COMMAND_INSTR(0x0d, 0x03),
93 	ILI9881C_COMMAND_INSTR(0x0e, 0x00),
94 	ILI9881C_COMMAND_INSTR(0x0f, 0x25),
95 	ILI9881C_COMMAND_INSTR(0x10, 0x25),
96 	ILI9881C_COMMAND_INSTR(0x11, 0x00),
97 	ILI9881C_COMMAND_INSTR(0x12, 0x00),
98 	ILI9881C_COMMAND_INSTR(0x13, 0x00),
99 	ILI9881C_COMMAND_INSTR(0x14, 0x00),
100 	ILI9881C_COMMAND_INSTR(0x15, 0x00),
101 	ILI9881C_COMMAND_INSTR(0x16, 0x0C),
102 	ILI9881C_COMMAND_INSTR(0x17, 0x00),
103 	ILI9881C_COMMAND_INSTR(0x18, 0x00),
104 	ILI9881C_COMMAND_INSTR(0x19, 0x00),
105 	ILI9881C_COMMAND_INSTR(0x1a, 0x00),
106 	ILI9881C_COMMAND_INSTR(0x1b, 0x00),
107 	ILI9881C_COMMAND_INSTR(0x1c, 0x00),
108 	ILI9881C_COMMAND_INSTR(0x1d, 0x00),
109 	ILI9881C_COMMAND_INSTR(0x1e, 0xC0),
110 	ILI9881C_COMMAND_INSTR(0x1f, 0x80),
111 	ILI9881C_COMMAND_INSTR(0x20, 0x04),
112 	ILI9881C_COMMAND_INSTR(0x21, 0x01),
113 	ILI9881C_COMMAND_INSTR(0x22, 0x00),
114 	ILI9881C_COMMAND_INSTR(0x23, 0x00),
115 	ILI9881C_COMMAND_INSTR(0x24, 0x00),
116 	ILI9881C_COMMAND_INSTR(0x25, 0x00),
117 	ILI9881C_COMMAND_INSTR(0x26, 0x00),
118 	ILI9881C_COMMAND_INSTR(0x27, 0x00),
119 	ILI9881C_COMMAND_INSTR(0x28, 0x33),
120 	ILI9881C_COMMAND_INSTR(0x29, 0x03),
121 	ILI9881C_COMMAND_INSTR(0x2a, 0x00),
122 	ILI9881C_COMMAND_INSTR(0x2b, 0x00),
123 	ILI9881C_COMMAND_INSTR(0x2c, 0x00),
124 	ILI9881C_COMMAND_INSTR(0x2d, 0x00),
125 	ILI9881C_COMMAND_INSTR(0x2e, 0x00),
126 	ILI9881C_COMMAND_INSTR(0x2f, 0x00),
127 	ILI9881C_COMMAND_INSTR(0x30, 0x00),
128 	ILI9881C_COMMAND_INSTR(0x31, 0x00),
129 	ILI9881C_COMMAND_INSTR(0x32, 0x00),
130 	ILI9881C_COMMAND_INSTR(0x33, 0x00),
131 	ILI9881C_COMMAND_INSTR(0x34, 0x04),
132 	ILI9881C_COMMAND_INSTR(0x35, 0x00),
133 	ILI9881C_COMMAND_INSTR(0x36, 0x00),
134 	ILI9881C_COMMAND_INSTR(0x37, 0x00),
135 	ILI9881C_COMMAND_INSTR(0x38, 0x3C),
136 	ILI9881C_COMMAND_INSTR(0x39, 0x00),
137 	ILI9881C_COMMAND_INSTR(0x3a, 0x00),
138 	ILI9881C_COMMAND_INSTR(0x3b, 0x00),
139 	ILI9881C_COMMAND_INSTR(0x3c, 0x00),
140 	ILI9881C_COMMAND_INSTR(0x3d, 0x00),
141 	ILI9881C_COMMAND_INSTR(0x3e, 0x00),
142 	ILI9881C_COMMAND_INSTR(0x3f, 0x00),
143 	ILI9881C_COMMAND_INSTR(0x40, 0x00),
144 	ILI9881C_COMMAND_INSTR(0x41, 0x00),
145 	ILI9881C_COMMAND_INSTR(0x42, 0x00),
146 	ILI9881C_COMMAND_INSTR(0x43, 0x00),
147 	ILI9881C_COMMAND_INSTR(0x44, 0x00),
148 	ILI9881C_COMMAND_INSTR(0x50, 0x01),
149 	ILI9881C_COMMAND_INSTR(0x51, 0x23),
150 	ILI9881C_COMMAND_INSTR(0x52, 0x45),
151 	ILI9881C_COMMAND_INSTR(0x53, 0x67),
152 	ILI9881C_COMMAND_INSTR(0x54, 0x89),
153 	ILI9881C_COMMAND_INSTR(0x55, 0xab),
154 	ILI9881C_COMMAND_INSTR(0x56, 0x01),
155 	ILI9881C_COMMAND_INSTR(0x57, 0x23),
156 	ILI9881C_COMMAND_INSTR(0x58, 0x45),
157 	ILI9881C_COMMAND_INSTR(0x59, 0x67),
158 	ILI9881C_COMMAND_INSTR(0x5a, 0x89),
159 	ILI9881C_COMMAND_INSTR(0x5b, 0xab),
160 	ILI9881C_COMMAND_INSTR(0x5c, 0xcd),
161 	ILI9881C_COMMAND_INSTR(0x5d, 0xef),
162 	ILI9881C_COMMAND_INSTR(0x5e, 0x11),
163 	ILI9881C_COMMAND_INSTR(0x5f, 0x02),
164 	ILI9881C_COMMAND_INSTR(0x60, 0x02),
165 	ILI9881C_COMMAND_INSTR(0x61, 0x02),
166 	ILI9881C_COMMAND_INSTR(0x62, 0x02),
167 	ILI9881C_COMMAND_INSTR(0x63, 0x02),
168 	ILI9881C_COMMAND_INSTR(0x64, 0x02),
169 	ILI9881C_COMMAND_INSTR(0x65, 0x02),
170 	ILI9881C_COMMAND_INSTR(0x66, 0x02),
171 	ILI9881C_COMMAND_INSTR(0x67, 0x02),
172 	ILI9881C_COMMAND_INSTR(0x68, 0x02),
173 	ILI9881C_COMMAND_INSTR(0x69, 0x02),
174 	ILI9881C_COMMAND_INSTR(0x6a, 0x0C),
175 	ILI9881C_COMMAND_INSTR(0x6b, 0x02),
176 	ILI9881C_COMMAND_INSTR(0x6c, 0x0F),
177 	ILI9881C_COMMAND_INSTR(0x6d, 0x0E),
178 	ILI9881C_COMMAND_INSTR(0x6e, 0x0D),
179 	ILI9881C_COMMAND_INSTR(0x6f, 0x06),
180 	ILI9881C_COMMAND_INSTR(0x70, 0x07),
181 	ILI9881C_COMMAND_INSTR(0x71, 0x02),
182 	ILI9881C_COMMAND_INSTR(0x72, 0x02),
183 	ILI9881C_COMMAND_INSTR(0x73, 0x02),
184 	ILI9881C_COMMAND_INSTR(0x74, 0x02),
185 	ILI9881C_COMMAND_INSTR(0x75, 0x02),
186 	ILI9881C_COMMAND_INSTR(0x76, 0x02),
187 	ILI9881C_COMMAND_INSTR(0x77, 0x02),
188 	ILI9881C_COMMAND_INSTR(0x78, 0x02),
189 	ILI9881C_COMMAND_INSTR(0x79, 0x02),
190 	ILI9881C_COMMAND_INSTR(0x7a, 0x02),
191 	ILI9881C_COMMAND_INSTR(0x7b, 0x02),
192 	ILI9881C_COMMAND_INSTR(0x7c, 0x02),
193 	ILI9881C_COMMAND_INSTR(0x7d, 0x02),
194 	ILI9881C_COMMAND_INSTR(0x7e, 0x02),
195 	ILI9881C_COMMAND_INSTR(0x7f, 0x02),
196 	ILI9881C_COMMAND_INSTR(0x80, 0x0C),
197 	ILI9881C_COMMAND_INSTR(0x81, 0x02),
198 	ILI9881C_COMMAND_INSTR(0x82, 0x0F),
199 	ILI9881C_COMMAND_INSTR(0x83, 0x0E),
200 	ILI9881C_COMMAND_INSTR(0x84, 0x0D),
201 	ILI9881C_COMMAND_INSTR(0x85, 0x06),
202 	ILI9881C_COMMAND_INSTR(0x86, 0x07),
203 	ILI9881C_COMMAND_INSTR(0x87, 0x02),
204 	ILI9881C_COMMAND_INSTR(0x88, 0x02),
205 	ILI9881C_COMMAND_INSTR(0x89, 0x02),
206 	ILI9881C_COMMAND_INSTR(0x8A, 0x02),
207 	ILI9881C_SWITCH_PAGE_INSTR(4),
208 	ILI9881C_COMMAND_INSTR(0x6C, 0x15),
209 	ILI9881C_COMMAND_INSTR(0x6E, 0x22),
210 	ILI9881C_COMMAND_INSTR(0x6F, 0x33),
211 	ILI9881C_COMMAND_INSTR(0x3A, 0xA4),
212 	ILI9881C_COMMAND_INSTR(0x8D, 0x0D),
213 	ILI9881C_COMMAND_INSTR(0x87, 0xBA),
214 	ILI9881C_COMMAND_INSTR(0x26, 0x76),
215 	ILI9881C_COMMAND_INSTR(0xB2, 0xD1),
216 	ILI9881C_SWITCH_PAGE_INSTR(1),
217 	ILI9881C_COMMAND_INSTR(0x22, 0x0A),
218 	ILI9881C_COMMAND_INSTR(0x53, 0xDC),
219 	ILI9881C_COMMAND_INSTR(0x55, 0xA7),
220 	ILI9881C_COMMAND_INSTR(0x50, 0x78),
221 	ILI9881C_COMMAND_INSTR(0x51, 0x78),
222 	ILI9881C_COMMAND_INSTR(0x31, 0x02),
223 	ILI9881C_COMMAND_INSTR(0x60, 0x14),
224 	ILI9881C_COMMAND_INSTR(0xA0, 0x2A),
225 	ILI9881C_COMMAND_INSTR(0xA1, 0x39),
226 	ILI9881C_COMMAND_INSTR(0xA2, 0x46),
227 	ILI9881C_COMMAND_INSTR(0xA3, 0x0e),
228 	ILI9881C_COMMAND_INSTR(0xA4, 0x12),
229 	ILI9881C_COMMAND_INSTR(0xA5, 0x25),
230 	ILI9881C_COMMAND_INSTR(0xA6, 0x19),
231 	ILI9881C_COMMAND_INSTR(0xA7, 0x1d),
232 	ILI9881C_COMMAND_INSTR(0xA8, 0xa6),
233 	ILI9881C_COMMAND_INSTR(0xA9, 0x1C),
234 	ILI9881C_COMMAND_INSTR(0xAA, 0x29),
235 	ILI9881C_COMMAND_INSTR(0xAB, 0x85),
236 	ILI9881C_COMMAND_INSTR(0xAC, 0x1C),
237 	ILI9881C_COMMAND_INSTR(0xAD, 0x1B),
238 	ILI9881C_COMMAND_INSTR(0xAE, 0x51),
239 	ILI9881C_COMMAND_INSTR(0xAF, 0x22),
240 	ILI9881C_COMMAND_INSTR(0xB0, 0x2d),
241 	ILI9881C_COMMAND_INSTR(0xB1, 0x4f),
242 	ILI9881C_COMMAND_INSTR(0xB2, 0x59),
243 	ILI9881C_COMMAND_INSTR(0xB3, 0x3F),
244 	ILI9881C_COMMAND_INSTR(0xC0, 0x2A),
245 	ILI9881C_COMMAND_INSTR(0xC1, 0x3a),
246 	ILI9881C_COMMAND_INSTR(0xC2, 0x45),
247 	ILI9881C_COMMAND_INSTR(0xC3, 0x0e),
248 	ILI9881C_COMMAND_INSTR(0xC4, 0x11),
249 	ILI9881C_COMMAND_INSTR(0xC5, 0x24),
250 	ILI9881C_COMMAND_INSTR(0xC6, 0x1a),
251 	ILI9881C_COMMAND_INSTR(0xC7, 0x1c),
252 	ILI9881C_COMMAND_INSTR(0xC8, 0xaa),
253 	ILI9881C_COMMAND_INSTR(0xC9, 0x1C),
254 	ILI9881C_COMMAND_INSTR(0xCA, 0x29),
255 	ILI9881C_COMMAND_INSTR(0xCB, 0x96),
256 	ILI9881C_COMMAND_INSTR(0xCC, 0x1C),
257 	ILI9881C_COMMAND_INSTR(0xCD, 0x1B),
258 	ILI9881C_COMMAND_INSTR(0xCE, 0x51),
259 	ILI9881C_COMMAND_INSTR(0xCF, 0x22),
260 	ILI9881C_COMMAND_INSTR(0xD0, 0x2b),
261 	ILI9881C_COMMAND_INSTR(0xD1, 0x4b),
262 	ILI9881C_COMMAND_INSTR(0xD2, 0x59),
263 	ILI9881C_COMMAND_INSTR(0xD3, 0x3F),
264 };
265 
266 static const struct ili9881c_instr k101_im2byl02_init[] = {
267 	ILI9881C_SWITCH_PAGE_INSTR(3),
268 	ILI9881C_COMMAND_INSTR(0x01, 0x00),
269 	ILI9881C_COMMAND_INSTR(0x02, 0x00),
270 	ILI9881C_COMMAND_INSTR(0x03, 0x73),
271 	ILI9881C_COMMAND_INSTR(0x04, 0x00),
272 	ILI9881C_COMMAND_INSTR(0x05, 0x00),
273 	ILI9881C_COMMAND_INSTR(0x06, 0x08),
274 	ILI9881C_COMMAND_INSTR(0x07, 0x00),
275 	ILI9881C_COMMAND_INSTR(0x08, 0x00),
276 	ILI9881C_COMMAND_INSTR(0x09, 0x00),
277 	ILI9881C_COMMAND_INSTR(0x0A, 0x01),
278 	ILI9881C_COMMAND_INSTR(0x0B, 0x01),
279 	ILI9881C_COMMAND_INSTR(0x0C, 0x00),
280 	ILI9881C_COMMAND_INSTR(0x0D, 0x01),
281 	ILI9881C_COMMAND_INSTR(0x0E, 0x01),
282 	ILI9881C_COMMAND_INSTR(0x0F, 0x00),
283 	ILI9881C_COMMAND_INSTR(0x10, 0x00),
284 	ILI9881C_COMMAND_INSTR(0x11, 0x00),
285 	ILI9881C_COMMAND_INSTR(0x12, 0x00),
286 	ILI9881C_COMMAND_INSTR(0x13, 0x00),
287 	ILI9881C_COMMAND_INSTR(0x14, 0x00),
288 	ILI9881C_COMMAND_INSTR(0x15, 0x00),
289 	ILI9881C_COMMAND_INSTR(0x16, 0x00),
290 	ILI9881C_COMMAND_INSTR(0x17, 0x00),
291 	ILI9881C_COMMAND_INSTR(0x18, 0x00),
292 	ILI9881C_COMMAND_INSTR(0x19, 0x00),
293 	ILI9881C_COMMAND_INSTR(0x1A, 0x00),
294 	ILI9881C_COMMAND_INSTR(0x1B, 0x00),
295 	ILI9881C_COMMAND_INSTR(0x1C, 0x00),
296 	ILI9881C_COMMAND_INSTR(0x1D, 0x00),
297 	ILI9881C_COMMAND_INSTR(0x1E, 0x40),
298 	ILI9881C_COMMAND_INSTR(0x1F, 0xC0),
299 	ILI9881C_COMMAND_INSTR(0x20, 0x06),
300 	ILI9881C_COMMAND_INSTR(0x21, 0x01),
301 	ILI9881C_COMMAND_INSTR(0x22, 0x06),
302 	ILI9881C_COMMAND_INSTR(0x23, 0x01),
303 	ILI9881C_COMMAND_INSTR(0x24, 0x88),
304 	ILI9881C_COMMAND_INSTR(0x25, 0x88),
305 	ILI9881C_COMMAND_INSTR(0x26, 0x00),
306 	ILI9881C_COMMAND_INSTR(0x27, 0x00),
307 	ILI9881C_COMMAND_INSTR(0x28, 0x3B),
308 	ILI9881C_COMMAND_INSTR(0x29, 0x03),
309 	ILI9881C_COMMAND_INSTR(0x2A, 0x00),
310 	ILI9881C_COMMAND_INSTR(0x2B, 0x00),
311 	ILI9881C_COMMAND_INSTR(0x2C, 0x00),
312 	ILI9881C_COMMAND_INSTR(0x2D, 0x00),
313 	ILI9881C_COMMAND_INSTR(0x2E, 0x00),
314 	ILI9881C_COMMAND_INSTR(0x2F, 0x00),
315 	ILI9881C_COMMAND_INSTR(0x30, 0x00),
316 	ILI9881C_COMMAND_INSTR(0x31, 0x00),
317 	ILI9881C_COMMAND_INSTR(0x32, 0x00),
318 	ILI9881C_COMMAND_INSTR(0x33, 0x00),
319 	ILI9881C_COMMAND_INSTR(0x34, 0x00), /* GPWR1/2 non overlap time 2.62us */
320 	ILI9881C_COMMAND_INSTR(0x35, 0x00),
321 	ILI9881C_COMMAND_INSTR(0x36, 0x00),
322 	ILI9881C_COMMAND_INSTR(0x37, 0x00),
323 	ILI9881C_COMMAND_INSTR(0x38, 0x00),
324 	ILI9881C_COMMAND_INSTR(0x39, 0x00),
325 	ILI9881C_COMMAND_INSTR(0x3A, 0x00),
326 	ILI9881C_COMMAND_INSTR(0x3B, 0x00),
327 	ILI9881C_COMMAND_INSTR(0x3C, 0x00),
328 	ILI9881C_COMMAND_INSTR(0x3D, 0x00),
329 	ILI9881C_COMMAND_INSTR(0x3E, 0x00),
330 	ILI9881C_COMMAND_INSTR(0x3F, 0x00),
331 	ILI9881C_COMMAND_INSTR(0x40, 0x00),
332 	ILI9881C_COMMAND_INSTR(0x41, 0x00),
333 	ILI9881C_COMMAND_INSTR(0x42, 0x00),
334 	ILI9881C_COMMAND_INSTR(0x43, 0x00),
335 	ILI9881C_COMMAND_INSTR(0x44, 0x00),
336 	ILI9881C_COMMAND_INSTR(0x50, 0x01),
337 	ILI9881C_COMMAND_INSTR(0x51, 0x23),
338 	ILI9881C_COMMAND_INSTR(0x52, 0x45),
339 	ILI9881C_COMMAND_INSTR(0x53, 0x67),
340 	ILI9881C_COMMAND_INSTR(0x54, 0x89),
341 	ILI9881C_COMMAND_INSTR(0x55, 0xAB),
342 	ILI9881C_COMMAND_INSTR(0x56, 0x01),
343 	ILI9881C_COMMAND_INSTR(0x57, 0x23),
344 	ILI9881C_COMMAND_INSTR(0x58, 0x45),
345 	ILI9881C_COMMAND_INSTR(0x59, 0x67),
346 	ILI9881C_COMMAND_INSTR(0x5A, 0x89),
347 	ILI9881C_COMMAND_INSTR(0x5B, 0xAB),
348 	ILI9881C_COMMAND_INSTR(0x5C, 0xCD),
349 	ILI9881C_COMMAND_INSTR(0x5D, 0xEF),
350 	ILI9881C_COMMAND_INSTR(0x5E, 0x00),
351 	ILI9881C_COMMAND_INSTR(0x5F, 0x01),
352 	ILI9881C_COMMAND_INSTR(0x60, 0x01),
353 	ILI9881C_COMMAND_INSTR(0x61, 0x06),
354 	ILI9881C_COMMAND_INSTR(0x62, 0x06),
355 	ILI9881C_COMMAND_INSTR(0x63, 0x07),
356 	ILI9881C_COMMAND_INSTR(0x64, 0x07),
357 	ILI9881C_COMMAND_INSTR(0x65, 0x00),
358 	ILI9881C_COMMAND_INSTR(0x66, 0x00),
359 	ILI9881C_COMMAND_INSTR(0x67, 0x02),
360 	ILI9881C_COMMAND_INSTR(0x68, 0x02),
361 	ILI9881C_COMMAND_INSTR(0x69, 0x05),
362 	ILI9881C_COMMAND_INSTR(0x6A, 0x05),
363 	ILI9881C_COMMAND_INSTR(0x6B, 0x02),
364 	ILI9881C_COMMAND_INSTR(0x6C, 0x0D),
365 	ILI9881C_COMMAND_INSTR(0x6D, 0x0D),
366 	ILI9881C_COMMAND_INSTR(0x6E, 0x0C),
367 	ILI9881C_COMMAND_INSTR(0x6F, 0x0C),
368 	ILI9881C_COMMAND_INSTR(0x70, 0x0F),
369 	ILI9881C_COMMAND_INSTR(0x71, 0x0F),
370 	ILI9881C_COMMAND_INSTR(0x72, 0x0E),
371 	ILI9881C_COMMAND_INSTR(0x73, 0x0E),
372 	ILI9881C_COMMAND_INSTR(0x74, 0x02),
373 	ILI9881C_COMMAND_INSTR(0x75, 0x01),
374 	ILI9881C_COMMAND_INSTR(0x76, 0x01),
375 	ILI9881C_COMMAND_INSTR(0x77, 0x06),
376 	ILI9881C_COMMAND_INSTR(0x78, 0x06),
377 	ILI9881C_COMMAND_INSTR(0x79, 0x07),
378 	ILI9881C_COMMAND_INSTR(0x7A, 0x07),
379 	ILI9881C_COMMAND_INSTR(0x7B, 0x00),
380 	ILI9881C_COMMAND_INSTR(0x7C, 0x00),
381 	ILI9881C_COMMAND_INSTR(0x7D, 0x02),
382 	ILI9881C_COMMAND_INSTR(0x7E, 0x02),
383 	ILI9881C_COMMAND_INSTR(0x7F, 0x05),
384 	ILI9881C_COMMAND_INSTR(0x80, 0x05),
385 	ILI9881C_COMMAND_INSTR(0x81, 0x02),
386 	ILI9881C_COMMAND_INSTR(0x82, 0x0D),
387 	ILI9881C_COMMAND_INSTR(0x83, 0x0D),
388 	ILI9881C_COMMAND_INSTR(0x84, 0x0C),
389 	ILI9881C_COMMAND_INSTR(0x85, 0x0C),
390 	ILI9881C_COMMAND_INSTR(0x86, 0x0F),
391 	ILI9881C_COMMAND_INSTR(0x87, 0x0F),
392 	ILI9881C_COMMAND_INSTR(0x88, 0x0E),
393 	ILI9881C_COMMAND_INSTR(0x89, 0x0E),
394 	ILI9881C_COMMAND_INSTR(0x8A, 0x02),
395 	ILI9881C_SWITCH_PAGE_INSTR(4),
396 	ILI9881C_COMMAND_INSTR(0x3B, 0xC0), /* ILI4003D sel */
397 	ILI9881C_COMMAND_INSTR(0x6C, 0x15), /* Set VCORE voltage = 1.5V */
398 	ILI9881C_COMMAND_INSTR(0x6E, 0x2A), /* di_pwr_reg=0 for power mode 2A, VGH clamp 18V */
399 	ILI9881C_COMMAND_INSTR(0x6F, 0x33), /* pumping ratio VGH=5x VGL=-3x */
400 	ILI9881C_COMMAND_INSTR(0x8D, 0x1B), /* VGL clamp -10V */
401 	ILI9881C_COMMAND_INSTR(0x87, 0xBA), /* ESD */
402 	ILI9881C_COMMAND_INSTR(0x3A, 0x24), /* POWER SAVING */
403 	ILI9881C_COMMAND_INSTR(0x26, 0x76),
404 	ILI9881C_COMMAND_INSTR(0xB2, 0xD1),
405 	ILI9881C_SWITCH_PAGE_INSTR(1),
406 	ILI9881C_COMMAND_INSTR(0x22, 0x0A), /* BGR, SS */
407 	ILI9881C_COMMAND_INSTR(0x31, 0x00), /* Zigzag type3 inversion */
408 	ILI9881C_COMMAND_INSTR(0x40, 0x53), /* ILI4003D sel */
409 	ILI9881C_COMMAND_INSTR(0x43, 0x66),
410 	ILI9881C_COMMAND_INSTR(0x53, 0x4C),
411 	ILI9881C_COMMAND_INSTR(0x50, 0x87),
412 	ILI9881C_COMMAND_INSTR(0x51, 0x82),
413 	ILI9881C_COMMAND_INSTR(0x60, 0x15),
414 	ILI9881C_COMMAND_INSTR(0x61, 0x01),
415 	ILI9881C_COMMAND_INSTR(0x62, 0x0C),
416 	ILI9881C_COMMAND_INSTR(0x63, 0x00),
417 	ILI9881C_COMMAND_INSTR(0xA0, 0x00),
418 	ILI9881C_COMMAND_INSTR(0xA1, 0x13), /* VP251 */
419 	ILI9881C_COMMAND_INSTR(0xA2, 0x23), /* VP247 */
420 	ILI9881C_COMMAND_INSTR(0xA3, 0x14), /* VP243 */
421 	ILI9881C_COMMAND_INSTR(0xA4, 0x16), /* VP239 */
422 	ILI9881C_COMMAND_INSTR(0xA5, 0x29), /* VP231 */
423 	ILI9881C_COMMAND_INSTR(0xA6, 0x1E), /* VP219 */
424 	ILI9881C_COMMAND_INSTR(0xA7, 0x1D), /* VP203 */
425 	ILI9881C_COMMAND_INSTR(0xA8, 0x86), /* VP175 */
426 	ILI9881C_COMMAND_INSTR(0xA9, 0x1E), /* VP144 */
427 	ILI9881C_COMMAND_INSTR(0xAA, 0x29), /* VP111 */
428 	ILI9881C_COMMAND_INSTR(0xAB, 0x74), /* VP80 */
429 	ILI9881C_COMMAND_INSTR(0xAC, 0x19), /* VP52 */
430 	ILI9881C_COMMAND_INSTR(0xAD, 0x17), /* VP36 */
431 	ILI9881C_COMMAND_INSTR(0xAE, 0x4B), /* VP24 */
432 	ILI9881C_COMMAND_INSTR(0xAF, 0x20), /* VP16 */
433 	ILI9881C_COMMAND_INSTR(0xB0, 0x26), /* VP12 */
434 	ILI9881C_COMMAND_INSTR(0xB1, 0x4C), /* VP8 */
435 	ILI9881C_COMMAND_INSTR(0xB2, 0x5D), /* VP4 */
436 	ILI9881C_COMMAND_INSTR(0xB3, 0x3F), /* VP0 */
437 	ILI9881C_COMMAND_INSTR(0xC0, 0x00), /* VN255 GAMMA N */
438 	ILI9881C_COMMAND_INSTR(0xC1, 0x13), /* VN251 */
439 	ILI9881C_COMMAND_INSTR(0xC2, 0x23), /* VN247 */
440 	ILI9881C_COMMAND_INSTR(0xC3, 0x14), /* VN243 */
441 	ILI9881C_COMMAND_INSTR(0xC4, 0x16), /* VN239 */
442 	ILI9881C_COMMAND_INSTR(0xC5, 0x29), /* VN231 */
443 	ILI9881C_COMMAND_INSTR(0xC6, 0x1E), /* VN219 */
444 	ILI9881C_COMMAND_INSTR(0xC7, 0x1D), /* VN203 */
445 	ILI9881C_COMMAND_INSTR(0xC8, 0x86), /* VN175 */
446 	ILI9881C_COMMAND_INSTR(0xC9, 0x1E), /* VN144 */
447 	ILI9881C_COMMAND_INSTR(0xCA, 0x29), /* VN111 */
448 	ILI9881C_COMMAND_INSTR(0xCB, 0x74), /* VN80 */
449 	ILI9881C_COMMAND_INSTR(0xCC, 0x19), /* VN52 */
450 	ILI9881C_COMMAND_INSTR(0xCD, 0x17), /* VN36 */
451 	ILI9881C_COMMAND_INSTR(0xCE, 0x4B), /* VN24 */
452 	ILI9881C_COMMAND_INSTR(0xCF, 0x20), /* VN16 */
453 	ILI9881C_COMMAND_INSTR(0xD0, 0x26), /* VN12 */
454 	ILI9881C_COMMAND_INSTR(0xD1, 0x4C), /* VN8 */
455 	ILI9881C_COMMAND_INSTR(0xD2, 0x5D), /* VN4 */
456 	ILI9881C_COMMAND_INSTR(0xD3, 0x3F), /* VN0 */
457 };
458 
459 static const struct ili9881c_instr w552946ab_init[] = {
460 	ILI9881C_SWITCH_PAGE_INSTR(3),
461 	ILI9881C_COMMAND_INSTR(0x01, 0x00),
462 	ILI9881C_COMMAND_INSTR(0x02, 0x00),
463 	ILI9881C_COMMAND_INSTR(0x03, 0x53),
464 	ILI9881C_COMMAND_INSTR(0x04, 0x53),
465 	ILI9881C_COMMAND_INSTR(0x05, 0x13),
466 	ILI9881C_COMMAND_INSTR(0x06, 0x04),
467 	ILI9881C_COMMAND_INSTR(0x07, 0x02),
468 	ILI9881C_COMMAND_INSTR(0x08, 0x02),
469 	ILI9881C_COMMAND_INSTR(0x09, 0x00),
470 	ILI9881C_COMMAND_INSTR(0x0A, 0x00),
471 	ILI9881C_COMMAND_INSTR(0x0B, 0x00),
472 	ILI9881C_COMMAND_INSTR(0x0C, 0x00),
473 	ILI9881C_COMMAND_INSTR(0x0D, 0x00),
474 	ILI9881C_COMMAND_INSTR(0x0E, 0x00),
475 	ILI9881C_COMMAND_INSTR(0x0F, 0x00),
476 
477 	ILI9881C_COMMAND_INSTR(0x10, 0x00),
478 	ILI9881C_COMMAND_INSTR(0x11, 0x00),
479 	ILI9881C_COMMAND_INSTR(0x12, 0x00),
480 	ILI9881C_COMMAND_INSTR(0x13, 0x00),
481 	ILI9881C_COMMAND_INSTR(0x14, 0x00),
482 	ILI9881C_COMMAND_INSTR(0x15, 0x08),
483 	ILI9881C_COMMAND_INSTR(0x16, 0x10),
484 	ILI9881C_COMMAND_INSTR(0x17, 0x00),
485 	ILI9881C_COMMAND_INSTR(0x18, 0x08),
486 	ILI9881C_COMMAND_INSTR(0x19, 0x00),
487 	ILI9881C_COMMAND_INSTR(0x1A, 0x00),
488 	ILI9881C_COMMAND_INSTR(0x1B, 0x00),
489 	ILI9881C_COMMAND_INSTR(0x1C, 0x00),
490 	ILI9881C_COMMAND_INSTR(0x1D, 0x00),
491 	ILI9881C_COMMAND_INSTR(0x1E, 0xC0),
492 	ILI9881C_COMMAND_INSTR(0x1F, 0x80),
493 
494 	ILI9881C_COMMAND_INSTR(0x20, 0x02),
495 	ILI9881C_COMMAND_INSTR(0x21, 0x09),
496 	ILI9881C_COMMAND_INSTR(0x22, 0x00),
497 	ILI9881C_COMMAND_INSTR(0x23, 0x00),
498 	ILI9881C_COMMAND_INSTR(0x24, 0x00),
499 	ILI9881C_COMMAND_INSTR(0x25, 0x00),
500 	ILI9881C_COMMAND_INSTR(0x26, 0x00),
501 	ILI9881C_COMMAND_INSTR(0x27, 0x00),
502 	ILI9881C_COMMAND_INSTR(0x28, 0x55),
503 	ILI9881C_COMMAND_INSTR(0x29, 0x03),
504 	ILI9881C_COMMAND_INSTR(0x2A, 0x00),
505 	ILI9881C_COMMAND_INSTR(0x2B, 0x00),
506 	ILI9881C_COMMAND_INSTR(0x2C, 0x00),
507 	ILI9881C_COMMAND_INSTR(0x2D, 0x00),
508 	ILI9881C_COMMAND_INSTR(0x2E, 0x00),
509 	ILI9881C_COMMAND_INSTR(0x2F, 0x00),
510 
511 	ILI9881C_COMMAND_INSTR(0x30, 0x00),
512 	ILI9881C_COMMAND_INSTR(0x31, 0x00),
513 	ILI9881C_COMMAND_INSTR(0x32, 0x00),
514 	ILI9881C_COMMAND_INSTR(0x33, 0x00),
515 	ILI9881C_COMMAND_INSTR(0x34, 0x04),
516 	ILI9881C_COMMAND_INSTR(0x35, 0x05),
517 	ILI9881C_COMMAND_INSTR(0x36, 0x05),
518 	ILI9881C_COMMAND_INSTR(0x37, 0x00),
519 	ILI9881C_COMMAND_INSTR(0x38, 0x3C),
520 	ILI9881C_COMMAND_INSTR(0x39, 0x35),
521 	ILI9881C_COMMAND_INSTR(0x3A, 0x00),
522 	ILI9881C_COMMAND_INSTR(0x3B, 0x40),
523 	ILI9881C_COMMAND_INSTR(0x3C, 0x00),
524 	ILI9881C_COMMAND_INSTR(0x3D, 0x00),
525 	ILI9881C_COMMAND_INSTR(0x3E, 0x00),
526 	ILI9881C_COMMAND_INSTR(0x3F, 0x00),
527 
528 	ILI9881C_COMMAND_INSTR(0x40, 0x00),
529 	ILI9881C_COMMAND_INSTR(0x41, 0x88),
530 	ILI9881C_COMMAND_INSTR(0x42, 0x00),
531 	ILI9881C_COMMAND_INSTR(0x43, 0x00),
532 	ILI9881C_COMMAND_INSTR(0x44, 0x1F),
533 
534 	ILI9881C_COMMAND_INSTR(0x50, 0x01),
535 	ILI9881C_COMMAND_INSTR(0x51, 0x23),
536 	ILI9881C_COMMAND_INSTR(0x52, 0x45),
537 	ILI9881C_COMMAND_INSTR(0x53, 0x67),
538 	ILI9881C_COMMAND_INSTR(0x54, 0x89),
539 	ILI9881C_COMMAND_INSTR(0x55, 0xaB),
540 	ILI9881C_COMMAND_INSTR(0x56, 0x01),
541 	ILI9881C_COMMAND_INSTR(0x57, 0x23),
542 	ILI9881C_COMMAND_INSTR(0x58, 0x45),
543 	ILI9881C_COMMAND_INSTR(0x59, 0x67),
544 	ILI9881C_COMMAND_INSTR(0x5A, 0x89),
545 	ILI9881C_COMMAND_INSTR(0x5B, 0xAB),
546 	ILI9881C_COMMAND_INSTR(0x5C, 0xCD),
547 	ILI9881C_COMMAND_INSTR(0x5D, 0xEF),
548 	ILI9881C_COMMAND_INSTR(0x5E, 0x03),
549 	ILI9881C_COMMAND_INSTR(0x5F, 0x14),
550 
551 	ILI9881C_COMMAND_INSTR(0x60, 0x15),
552 	ILI9881C_COMMAND_INSTR(0x61, 0x0C),
553 	ILI9881C_COMMAND_INSTR(0x62, 0x0D),
554 	ILI9881C_COMMAND_INSTR(0x63, 0x0E),
555 	ILI9881C_COMMAND_INSTR(0x64, 0x0F),
556 	ILI9881C_COMMAND_INSTR(0x65, 0x10),
557 	ILI9881C_COMMAND_INSTR(0x66, 0x11),
558 	ILI9881C_COMMAND_INSTR(0x67, 0x08),
559 	ILI9881C_COMMAND_INSTR(0x68, 0x02),
560 	ILI9881C_COMMAND_INSTR(0x69, 0x0A),
561 	ILI9881C_COMMAND_INSTR(0x6A, 0x02),
562 	ILI9881C_COMMAND_INSTR(0x6B, 0x02),
563 	ILI9881C_COMMAND_INSTR(0x6C, 0x02),
564 	ILI9881C_COMMAND_INSTR(0x6D, 0x02),
565 	ILI9881C_COMMAND_INSTR(0x6E, 0x02),
566 	ILI9881C_COMMAND_INSTR(0x6F, 0x02),
567 
568 	ILI9881C_COMMAND_INSTR(0x70, 0x02),
569 	ILI9881C_COMMAND_INSTR(0x71, 0x02),
570 	ILI9881C_COMMAND_INSTR(0x72, 0x06),
571 	ILI9881C_COMMAND_INSTR(0x73, 0x02),
572 	ILI9881C_COMMAND_INSTR(0x74, 0x02),
573 	ILI9881C_COMMAND_INSTR(0x75, 0x14),
574 	ILI9881C_COMMAND_INSTR(0x76, 0x15),
575 	ILI9881C_COMMAND_INSTR(0x77, 0x0F),
576 	ILI9881C_COMMAND_INSTR(0x78, 0x0E),
577 	ILI9881C_COMMAND_INSTR(0x79, 0x0D),
578 	ILI9881C_COMMAND_INSTR(0x7A, 0x0C),
579 	ILI9881C_COMMAND_INSTR(0x7B, 0x11),
580 	ILI9881C_COMMAND_INSTR(0x7C, 0x10),
581 	ILI9881C_COMMAND_INSTR(0x7D, 0x06),
582 	ILI9881C_COMMAND_INSTR(0x7E, 0x02),
583 	ILI9881C_COMMAND_INSTR(0x7F, 0x0A),
584 
585 	ILI9881C_COMMAND_INSTR(0x80, 0x02),
586 	ILI9881C_COMMAND_INSTR(0x81, 0x02),
587 	ILI9881C_COMMAND_INSTR(0x82, 0x02),
588 	ILI9881C_COMMAND_INSTR(0x83, 0x02),
589 	ILI9881C_COMMAND_INSTR(0x84, 0x02),
590 	ILI9881C_COMMAND_INSTR(0x85, 0x02),
591 	ILI9881C_COMMAND_INSTR(0x86, 0x02),
592 	ILI9881C_COMMAND_INSTR(0x87, 0x02),
593 	ILI9881C_COMMAND_INSTR(0x88, 0x08),
594 	ILI9881C_COMMAND_INSTR(0x89, 0x02),
595 	ILI9881C_COMMAND_INSTR(0x8A, 0x02),
596 
597 	ILI9881C_SWITCH_PAGE_INSTR(4),
598 	ILI9881C_COMMAND_INSTR(0x00, 0x80),
599 	ILI9881C_COMMAND_INSTR(0x70, 0x00),
600 	ILI9881C_COMMAND_INSTR(0x71, 0x00),
601 	ILI9881C_COMMAND_INSTR(0x66, 0xFE),
602 	ILI9881C_COMMAND_INSTR(0x82, 0x15),
603 	ILI9881C_COMMAND_INSTR(0x84, 0x15),
604 	ILI9881C_COMMAND_INSTR(0x85, 0x15),
605 	ILI9881C_COMMAND_INSTR(0x3a, 0x24),
606 	ILI9881C_COMMAND_INSTR(0x32, 0xAC),
607 	ILI9881C_COMMAND_INSTR(0x8C, 0x80),
608 	ILI9881C_COMMAND_INSTR(0x3C, 0xF5),
609 	ILI9881C_COMMAND_INSTR(0x88, 0x33),
610 
611 	ILI9881C_SWITCH_PAGE_INSTR(1),
612 	ILI9881C_COMMAND_INSTR(0x22, 0x0A),
613 	ILI9881C_COMMAND_INSTR(0x31, 0x00),
614 	ILI9881C_COMMAND_INSTR(0x53, 0x78),
615 	ILI9881C_COMMAND_INSTR(0x50, 0x5B),
616 	ILI9881C_COMMAND_INSTR(0x51, 0x5B),
617 	ILI9881C_COMMAND_INSTR(0x60, 0x20),
618 	ILI9881C_COMMAND_INSTR(0x61, 0x00),
619 	ILI9881C_COMMAND_INSTR(0x62, 0x0D),
620 	ILI9881C_COMMAND_INSTR(0x63, 0x00),
621 
622 	ILI9881C_COMMAND_INSTR(0xA0, 0x00),
623 	ILI9881C_COMMAND_INSTR(0xA1, 0x10),
624 	ILI9881C_COMMAND_INSTR(0xA2, 0x1C),
625 	ILI9881C_COMMAND_INSTR(0xA3, 0x13),
626 	ILI9881C_COMMAND_INSTR(0xA4, 0x15),
627 	ILI9881C_COMMAND_INSTR(0xA5, 0x26),
628 	ILI9881C_COMMAND_INSTR(0xA6, 0x1A),
629 	ILI9881C_COMMAND_INSTR(0xA7, 0x1D),
630 	ILI9881C_COMMAND_INSTR(0xA8, 0x67),
631 	ILI9881C_COMMAND_INSTR(0xA9, 0x1C),
632 	ILI9881C_COMMAND_INSTR(0xAA, 0x29),
633 	ILI9881C_COMMAND_INSTR(0xAB, 0x5B),
634 	ILI9881C_COMMAND_INSTR(0xAC, 0x26),
635 	ILI9881C_COMMAND_INSTR(0xAD, 0x28),
636 	ILI9881C_COMMAND_INSTR(0xAE, 0x5C),
637 	ILI9881C_COMMAND_INSTR(0xAF, 0x30),
638 	ILI9881C_COMMAND_INSTR(0xB0, 0x31),
639 	ILI9881C_COMMAND_INSTR(0xB1, 0x2E),
640 	ILI9881C_COMMAND_INSTR(0xB2, 0x32),
641 	ILI9881C_COMMAND_INSTR(0xB3, 0x00),
642 
643 	ILI9881C_COMMAND_INSTR(0xC0, 0x00),
644 	ILI9881C_COMMAND_INSTR(0xC1, 0x10),
645 	ILI9881C_COMMAND_INSTR(0xC2, 0x1C),
646 	ILI9881C_COMMAND_INSTR(0xC3, 0x13),
647 	ILI9881C_COMMAND_INSTR(0xC4, 0x15),
648 	ILI9881C_COMMAND_INSTR(0xC5, 0x26),
649 	ILI9881C_COMMAND_INSTR(0xC6, 0x1A),
650 	ILI9881C_COMMAND_INSTR(0xC7, 0x1D),
651 	ILI9881C_COMMAND_INSTR(0xC8, 0x67),
652 	ILI9881C_COMMAND_INSTR(0xC9, 0x1C),
653 	ILI9881C_COMMAND_INSTR(0xCA, 0x29),
654 	ILI9881C_COMMAND_INSTR(0xCB, 0x5B),
655 	ILI9881C_COMMAND_INSTR(0xCC, 0x26),
656 	ILI9881C_COMMAND_INSTR(0xCD, 0x28),
657 	ILI9881C_COMMAND_INSTR(0xCE, 0x5C),
658 	ILI9881C_COMMAND_INSTR(0xCF, 0x30),
659 	ILI9881C_COMMAND_INSTR(0xD0, 0x31),
660 	ILI9881C_COMMAND_INSTR(0xD1, 0x2E),
661 	ILI9881C_COMMAND_INSTR(0xD2, 0x32),
662 	ILI9881C_COMMAND_INSTR(0xD3, 0x00),
663 	ILI9881C_SWITCH_PAGE_INSTR(0),
664 };
665 
666 static inline struct ili9881c *panel_to_ili9881c(struct drm_panel *panel)
667 {
668 	return container_of(panel, struct ili9881c, panel);
669 }
670 
671 /*
672  * The panel seems to accept some private DCS commands that map
673  * directly to registers.
674  *
675  * It is organised by page, with each page having its own set of
676  * registers, and the first page looks like it's holding the standard
677  * DCS commands.
678  *
679  * So before any attempt at sending a command or data, we have to be
680  * sure if we're in the right page or not.
681  */
682 static int ili9881c_switch_page(struct ili9881c *ctx, u8 page)
683 {
684 	u8 buf[4] = { 0xff, 0x98, 0x81, page };
685 	int ret;
686 
687 	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, buf, sizeof(buf));
688 	if (ret < 0)
689 		return ret;
690 
691 	return 0;
692 }
693 
694 static int ili9881c_send_cmd_data(struct ili9881c *ctx, u8 cmd, u8 data)
695 {
696 	u8 buf[2] = { cmd, data };
697 	int ret;
698 
699 	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, buf, sizeof(buf));
700 	if (ret < 0)
701 		return ret;
702 
703 	return 0;
704 }
705 
706 static int ili9881c_prepare(struct drm_panel *panel)
707 {
708 	struct ili9881c *ctx = panel_to_ili9881c(panel);
709 	unsigned int i;
710 	int ret;
711 
712 	/* Power the panel */
713 	ret = regulator_enable(ctx->power);
714 	if (ret)
715 		return ret;
716 	msleep(5);
717 
718 	/* And reset it */
719 	gpiod_set_value(ctx->reset, 1);
720 	msleep(20);
721 
722 	gpiod_set_value(ctx->reset, 0);
723 	msleep(20);
724 
725 	for (i = 0; i < ctx->desc->init_length; i++) {
726 		const struct ili9881c_instr *instr = &ctx->desc->init[i];
727 
728 		if (instr->op == ILI9881C_SWITCH_PAGE)
729 			ret = ili9881c_switch_page(ctx, instr->arg.page);
730 		else if (instr->op == ILI9881C_COMMAND)
731 			ret = ili9881c_send_cmd_data(ctx, instr->arg.cmd.cmd,
732 						      instr->arg.cmd.data);
733 
734 		if (ret)
735 			return ret;
736 	}
737 
738 	ret = ili9881c_switch_page(ctx, 0);
739 	if (ret)
740 		return ret;
741 
742 	ret = mipi_dsi_dcs_set_tear_on(ctx->dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
743 	if (ret)
744 		return ret;
745 
746 	ret = mipi_dsi_dcs_exit_sleep_mode(ctx->dsi);
747 	if (ret)
748 		return ret;
749 
750 	return 0;
751 }
752 
753 static int ili9881c_enable(struct drm_panel *panel)
754 {
755 	struct ili9881c *ctx = panel_to_ili9881c(panel);
756 
757 	msleep(120);
758 
759 	mipi_dsi_dcs_set_display_on(ctx->dsi);
760 
761 	return 0;
762 }
763 
764 static int ili9881c_disable(struct drm_panel *panel)
765 {
766 	struct ili9881c *ctx = panel_to_ili9881c(panel);
767 
768 	return mipi_dsi_dcs_set_display_off(ctx->dsi);
769 }
770 
771 static int ili9881c_unprepare(struct drm_panel *panel)
772 {
773 	struct ili9881c *ctx = panel_to_ili9881c(panel);
774 
775 	mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
776 	regulator_disable(ctx->power);
777 	gpiod_set_value(ctx->reset, 1);
778 
779 	return 0;
780 }
781 
782 static const struct drm_display_mode lhr050h41_default_mode = {
783 	.clock		= 62000,
784 
785 	.hdisplay	= 720,
786 	.hsync_start	= 720 + 10,
787 	.hsync_end	= 720 + 10 + 20,
788 	.htotal		= 720 + 10 + 20 + 30,
789 
790 	.vdisplay	= 1280,
791 	.vsync_start	= 1280 + 10,
792 	.vsync_end	= 1280 + 10 + 10,
793 	.vtotal		= 1280 + 10 + 10 + 20,
794 
795 	.width_mm	= 62,
796 	.height_mm	= 110,
797 };
798 
799 static const struct drm_display_mode k101_im2byl02_default_mode = {
800 	.clock		= 69700,
801 
802 	.hdisplay	= 800,
803 	.hsync_start	= 800 + 52,
804 	.hsync_end	= 800 + 52 + 8,
805 	.htotal		= 800 + 52 + 8 + 48,
806 
807 	.vdisplay	= 1280,
808 	.vsync_start	= 1280 + 16,
809 	.vsync_end	= 1280 + 16 + 6,
810 	.vtotal		= 1280 + 16 + 6 + 15,
811 
812 	.width_mm	= 135,
813 	.height_mm	= 217,
814 };
815 
816 static const struct drm_display_mode w552946aba_default_mode = {
817 	.clock		= 64000,
818 
819 	.hdisplay	= 720,
820 	.hsync_start	= 720 + 40,
821 	.hsync_end	= 720 + 40 + 10,
822 	.htotal		= 720 + 40 + 10 + 40,
823 
824 	.vdisplay	= 1280,
825 	.vsync_start	= 1280 + 22,
826 	.vsync_end	= 1280 + 22 + 4,
827 	.vtotal		= 1280 + 22 + 4 + 11,
828 
829 	.width_mm	= 68,
830 	.height_mm	= 121,
831 };
832 
833 static int ili9881c_get_modes(struct drm_panel *panel,
834 			      struct drm_connector *connector)
835 {
836 	struct ili9881c *ctx = panel_to_ili9881c(panel);
837 	struct drm_display_mode *mode;
838 
839 	mode = drm_mode_duplicate(connector->dev, ctx->desc->mode);
840 	if (!mode) {
841 		dev_err(&ctx->dsi->dev, "failed to add mode %ux%ux@%u\n",
842 			ctx->desc->mode->hdisplay,
843 			ctx->desc->mode->vdisplay,
844 			drm_mode_vrefresh(ctx->desc->mode));
845 		return -ENOMEM;
846 	}
847 
848 	drm_mode_set_name(mode);
849 
850 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
851 	drm_mode_probed_add(connector, mode);
852 
853 	connector->display_info.width_mm = mode->width_mm;
854 	connector->display_info.height_mm = mode->height_mm;
855 
856 	/*
857 	 * TODO: Remove once all drm drivers call
858 	 * drm_connector_set_orientation_from_panel()
859 	 */
860 	drm_connector_set_panel_orientation(connector, ctx->orientation);
861 
862 	return 1;
863 }
864 
865 static enum drm_panel_orientation ili9881c_get_orientation(struct drm_panel *panel)
866 {
867 	struct ili9881c *ctx = panel_to_ili9881c(panel);
868 
869 	return ctx->orientation;
870 }
871 
872 static const struct drm_panel_funcs ili9881c_funcs = {
873 	.prepare	= ili9881c_prepare,
874 	.unprepare	= ili9881c_unprepare,
875 	.enable		= ili9881c_enable,
876 	.disable	= ili9881c_disable,
877 	.get_modes	= ili9881c_get_modes,
878 	.get_orientation = ili9881c_get_orientation,
879 };
880 
881 static int ili9881c_dsi_probe(struct mipi_dsi_device *dsi)
882 {
883 	struct ili9881c *ctx;
884 	int ret;
885 
886 	ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);
887 	if (!ctx)
888 		return -ENOMEM;
889 	mipi_dsi_set_drvdata(dsi, ctx);
890 	ctx->dsi = dsi;
891 	ctx->desc = of_device_get_match_data(&dsi->dev);
892 
893 	drm_panel_init(&ctx->panel, &dsi->dev, &ili9881c_funcs,
894 		       DRM_MODE_CONNECTOR_DSI);
895 
896 	ctx->power = devm_regulator_get(&dsi->dev, "power");
897 	if (IS_ERR(ctx->power))
898 		return dev_err_probe(&dsi->dev, PTR_ERR(ctx->power),
899 				     "Couldn't get our power regulator\n");
900 
901 	ctx->reset = devm_gpiod_get_optional(&dsi->dev, "reset", GPIOD_OUT_LOW);
902 	if (IS_ERR(ctx->reset))
903 		return dev_err_probe(&dsi->dev, PTR_ERR(ctx->reset),
904 				     "Couldn't get our reset GPIO\n");
905 
906 	ret = of_drm_get_panel_orientation(dsi->dev.of_node, &ctx->orientation);
907 	if (ret) {
908 		dev_err(&dsi->dev, "%pOF: failed to get orientation: %d\n",
909 			dsi->dev.of_node, ret);
910 		return ret;
911 	}
912 
913 	ret = drm_panel_of_backlight(&ctx->panel);
914 	if (ret)
915 		return ret;
916 
917 	drm_panel_add(&ctx->panel);
918 
919 	dsi->mode_flags = ctx->desc->mode_flags;
920 	dsi->format = MIPI_DSI_FMT_RGB888;
921 	dsi->lanes = 4;
922 
923 	return mipi_dsi_attach(dsi);
924 }
925 
926 static void ili9881c_dsi_remove(struct mipi_dsi_device *dsi)
927 {
928 	struct ili9881c *ctx = mipi_dsi_get_drvdata(dsi);
929 
930 	mipi_dsi_detach(dsi);
931 	drm_panel_remove(&ctx->panel);
932 }
933 
934 static const struct ili9881c_desc lhr050h41_desc = {
935 	.init = lhr050h41_init,
936 	.init_length = ARRAY_SIZE(lhr050h41_init),
937 	.mode = &lhr050h41_default_mode,
938 	.mode_flags = MIPI_DSI_MODE_VIDEO_SYNC_PULSE,
939 };
940 
941 static const struct ili9881c_desc k101_im2byl02_desc = {
942 	.init = k101_im2byl02_init,
943 	.init_length = ARRAY_SIZE(k101_im2byl02_init),
944 	.mode = &k101_im2byl02_default_mode,
945 	.mode_flags = MIPI_DSI_MODE_VIDEO_SYNC_PULSE,
946 };
947 
948 static const struct ili9881c_desc w552946aba_desc = {
949 	.init = w552946ab_init,
950 	.init_length = ARRAY_SIZE(w552946ab_init),
951 	.mode = &w552946aba_default_mode,
952 	.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
953 		      MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET,
954 };
955 
956 static const struct of_device_id ili9881c_of_match[] = {
957 	{ .compatible = "bananapi,lhr050h41", .data = &lhr050h41_desc },
958 	{ .compatible = "feixin,k101-im2byl02", .data = &k101_im2byl02_desc },
959 	{ .compatible = "wanchanglong,w552946aba", .data = &w552946aba_desc },
960 	{ }
961 };
962 MODULE_DEVICE_TABLE(of, ili9881c_of_match);
963 
964 static struct mipi_dsi_driver ili9881c_dsi_driver = {
965 	.probe		= ili9881c_dsi_probe,
966 	.remove		= ili9881c_dsi_remove,
967 	.driver = {
968 		.name		= "ili9881c-dsi",
969 		.of_match_table	= ili9881c_of_match,
970 	},
971 };
972 module_mipi_dsi_driver(ili9881c_dsi_driver);
973 
974 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
975 MODULE_DESCRIPTION("Ilitek ILI9881C Controller Driver");
976 MODULE_LICENSE("GPL v2");
977