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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2021, Linaro Limited
4 *
5 * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree:
6 * Copyright (c) 2013, The Linux Foundation. All rights reserved.
7 */
8
9#include <linux/backlight.h>
10#include <linux/delay.h>
11#include <linux/gpio/consumer.h>
12#include <linux/module.h>
13#include <linux/of.h>
14#include <linux/regulator/consumer.h>
15
16#include <drm/drm_mipi_dsi.h>
17#include <drm/drm_modes.h>
18#include <drm/drm_panel.h>
19
20struct truly_nt35521 {
21 struct drm_panel panel;
22 struct mipi_dsi_device *dsi;
23 struct regulator_bulk_data supplies[2];
24 struct gpio_desc *reset_gpio;
25 struct gpio_desc *blen_gpio;
26 bool prepared;
27 bool enabled;
28};
29
30static inline
31struct truly_nt35521 *to_truly_nt35521(struct drm_panel *panel)
32{
33 return container_of(panel, struct truly_nt35521, panel);
34}
35
36#define dsi_generic_write_seq(dsi, seq...) do { \
37 static const u8 d[] = { seq }; \
38 int ret; \
39 ret = mipi_dsi_generic_write(dsi, d, ARRAY_SIZE(d)); \
40 if (ret < 0) \
41 return ret; \
42 } while (0)
43
44static void truly_nt35521_reset(struct truly_nt35521 *ctx)
45{
46 gpiod_set_value_cansleep(ctx->reset_gpio, 1);
47 usleep_range(1000, 2000);
48 gpiod_set_value_cansleep(ctx->reset_gpio, 1);
49 usleep_range(10000, 11000);
50 gpiod_set_value_cansleep(ctx->reset_gpio, 0);
51 msleep(150);
52}
53
54static int truly_nt35521_on(struct truly_nt35521 *ctx)
55{
56 struct mipi_dsi_device *dsi = ctx->dsi;
57 struct device *dev = &dsi->dev;
58 int ret;
59
60 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
61
62 dsi_generic_write_seq(dsi, 0xf0, 0x55, 0xaa, 0x52, 0x08, 0x00);
63 dsi_generic_write_seq(dsi, 0xff, 0xaa, 0x55, 0xa5, 0x80);
64 dsi_generic_write_seq(dsi, 0x6f, 0x11, 0x00);
65 dsi_generic_write_seq(dsi, 0xf7, 0x20, 0x00);
66 dsi_generic_write_seq(dsi, 0x6f, 0x01);
67 dsi_generic_write_seq(dsi, 0xb1, 0x21);
68 dsi_generic_write_seq(dsi, 0xbd, 0x01, 0xa0, 0x10, 0x08, 0x01);
69 dsi_generic_write_seq(dsi, 0xb8, 0x01, 0x02, 0x0c, 0x02);
70 dsi_generic_write_seq(dsi, 0xbb, 0x11, 0x11);
71 dsi_generic_write_seq(dsi, 0xbc, 0x00, 0x00);
72 dsi_generic_write_seq(dsi, 0xb6, 0x02);
73 dsi_generic_write_seq(dsi, 0xf0, 0x55, 0xaa, 0x52, 0x08, 0x01);
74 dsi_generic_write_seq(dsi, 0xb0, 0x09, 0x09);
75 dsi_generic_write_seq(dsi, 0xb1, 0x09, 0x09);
76 dsi_generic_write_seq(dsi, 0xbc, 0x8c, 0x00);
77 dsi_generic_write_seq(dsi, 0xbd, 0x8c, 0x00);
78 dsi_generic_write_seq(dsi, 0xca, 0x00);
79 dsi_generic_write_seq(dsi, 0xc0, 0x04);
80 dsi_generic_write_seq(dsi, 0xbe, 0xb5);
81 dsi_generic_write_seq(dsi, 0xb3, 0x35, 0x35);
82 dsi_generic_write_seq(dsi, 0xb4, 0x25, 0x25);
83 dsi_generic_write_seq(dsi, 0xb9, 0x43, 0x43);
84 dsi_generic_write_seq(dsi, 0xba, 0x24, 0x24);
85 dsi_generic_write_seq(dsi, 0xf0, 0x55, 0xaa, 0x52, 0x08, 0x02);
86 dsi_generic_write_seq(dsi, 0xee, 0x03);
87 dsi_generic_write_seq(dsi, 0xb0,
88 0x00, 0xb2, 0x00, 0xb3, 0x00, 0xb6, 0x00, 0xc3,
89 0x00, 0xce, 0x00, 0xe1, 0x00, 0xf3, 0x01, 0x11);
90 dsi_generic_write_seq(dsi, 0xb1,
91 0x01, 0x2e, 0x01, 0x5c, 0x01, 0x82, 0x01, 0xc3,
92 0x01, 0xfe, 0x02, 0x00, 0x02, 0x37, 0x02, 0x77);
93 dsi_generic_write_seq(dsi, 0xb2,
94 0x02, 0xa1, 0x02, 0xd7, 0x02, 0xfe, 0x03, 0x2c,
95 0x03, 0x4b, 0x03, 0x63, 0x03, 0x8f, 0x03, 0x90);
96 dsi_generic_write_seq(dsi, 0xb3, 0x03, 0x96, 0x03, 0x98);
97 dsi_generic_write_seq(dsi, 0xb4,
98 0x00, 0x81, 0x00, 0x8b, 0x00, 0x9c, 0x00, 0xa9,
99 0x00, 0xb5, 0x00, 0xcb, 0x00, 0xdf, 0x01, 0x02);
100 dsi_generic_write_seq(dsi, 0xb5,
101 0x01, 0x1f, 0x01, 0x51, 0x01, 0x7a, 0x01, 0xbf,
102 0x01, 0xfa, 0x01, 0xfc, 0x02, 0x34, 0x02, 0x76);
103 dsi_generic_write_seq(dsi, 0xb6,
104 0x02, 0x9f, 0x02, 0xd7, 0x02, 0xfc, 0x03, 0x2c,
105 0x03, 0x4a, 0x03, 0x63, 0x03, 0x8f, 0x03, 0xa2);
106 dsi_generic_write_seq(dsi, 0xb7, 0x03, 0xb8, 0x03, 0xba);
107 dsi_generic_write_seq(dsi, 0xb8,
108 0x00, 0x01, 0x00, 0x02, 0x00, 0x0e, 0x00, 0x2a,
109 0x00, 0x41, 0x00, 0x67, 0x00, 0x87, 0x00, 0xb9);
110 dsi_generic_write_seq(dsi, 0xb9,
111 0x00, 0xe2, 0x01, 0x22, 0x01, 0x54, 0x01, 0xa3,
112 0x01, 0xe6, 0x01, 0xe7, 0x02, 0x24, 0x02, 0x67);
113 dsi_generic_write_seq(dsi, 0xba,
114 0x02, 0x93, 0x02, 0xcd, 0x02, 0xf6, 0x03, 0x31,
115 0x03, 0x6c, 0x03, 0xe9, 0x03, 0xef, 0x03, 0xf4);
116 dsi_generic_write_seq(dsi, 0xbb, 0x03, 0xf6, 0x03, 0xf7);
117 dsi_generic_write_seq(dsi, 0xf0, 0x55, 0xaa, 0x52, 0x08, 0x03);
118 dsi_generic_write_seq(dsi, 0xb0, 0x22, 0x00);
119 dsi_generic_write_seq(dsi, 0xb1, 0x22, 0x00);
120 dsi_generic_write_seq(dsi, 0xb2, 0x05, 0x00, 0x60, 0x00, 0x00);
121 dsi_generic_write_seq(dsi, 0xb3, 0x05, 0x00, 0x60, 0x00, 0x00);
122 dsi_generic_write_seq(dsi, 0xb4, 0x05, 0x00, 0x60, 0x00, 0x00);
123 dsi_generic_write_seq(dsi, 0xb5, 0x05, 0x00, 0x60, 0x00, 0x00);
124 dsi_generic_write_seq(dsi, 0xba, 0x53, 0x00, 0x60, 0x00, 0x00);
125 dsi_generic_write_seq(dsi, 0xbb, 0x53, 0x00, 0x60, 0x00, 0x00);
126 dsi_generic_write_seq(dsi, 0xbc, 0x53, 0x00, 0x60, 0x00, 0x00);
127 dsi_generic_write_seq(dsi, 0xbd, 0x53, 0x00, 0x60, 0x00, 0x00);
128 dsi_generic_write_seq(dsi, 0xc0, 0x00, 0x34, 0x00, 0x00);
129 dsi_generic_write_seq(dsi, 0xc1, 0x00, 0x00, 0x34, 0x00);
130 dsi_generic_write_seq(dsi, 0xc2, 0x00, 0x00, 0x34, 0x00);
131 dsi_generic_write_seq(dsi, 0xc3, 0x00, 0x00, 0x34, 0x00);
132 dsi_generic_write_seq(dsi, 0xc4, 0x60);
133 dsi_generic_write_seq(dsi, 0xc5, 0xc0);
134 dsi_generic_write_seq(dsi, 0xc6, 0x00);
135 dsi_generic_write_seq(dsi, 0xc7, 0x00);
136 dsi_generic_write_seq(dsi, 0xf0, 0x55, 0xaa, 0x52, 0x08, 0x05);
137 dsi_generic_write_seq(dsi, 0xb0, 0x17, 0x06);
138 dsi_generic_write_seq(dsi, 0xb1, 0x17, 0x06);
139 dsi_generic_write_seq(dsi, 0xb2, 0x17, 0x06);
140 dsi_generic_write_seq(dsi, 0xb3, 0x17, 0x06);
141 dsi_generic_write_seq(dsi, 0xb4, 0x17, 0x06);
142 dsi_generic_write_seq(dsi, 0xb5, 0x17, 0x06);
143 dsi_generic_write_seq(dsi, 0xb6, 0x17, 0x06);
144 dsi_generic_write_seq(dsi, 0xb7, 0x17, 0x06);
145 dsi_generic_write_seq(dsi, 0xb8, 0x00);
146 dsi_generic_write_seq(dsi, 0xb9, 0x00, 0x03);
147 dsi_generic_write_seq(dsi, 0xba, 0x00, 0x00);
148 dsi_generic_write_seq(dsi, 0xbb, 0x02, 0x03);
149 dsi_generic_write_seq(dsi, 0xbc, 0x02, 0x03);
150 dsi_generic_write_seq(dsi, 0xbd, 0x03, 0x03, 0x00, 0x03, 0x03);
151 dsi_generic_write_seq(dsi, 0xc0, 0x0b);
152 dsi_generic_write_seq(dsi, 0xc1, 0x09);
153 dsi_generic_write_seq(dsi, 0xc2, 0xa6);
154 dsi_generic_write_seq(dsi, 0xc3, 0x05);
155 dsi_generic_write_seq(dsi, 0xc4, 0x00);
156 dsi_generic_write_seq(dsi, 0xc5, 0x02);
157 dsi_generic_write_seq(dsi, 0xc6, 0x22);
158 dsi_generic_write_seq(dsi, 0xc7, 0x03);
159 dsi_generic_write_seq(dsi, 0xc8, 0x07, 0x20);
160 dsi_generic_write_seq(dsi, 0xc9, 0x03, 0x20);
161 dsi_generic_write_seq(dsi, 0xca, 0x01, 0x60);
162 dsi_generic_write_seq(dsi, 0xcb, 0x01, 0x60);
163 dsi_generic_write_seq(dsi, 0xcc, 0x00, 0x00, 0x02);
164 dsi_generic_write_seq(dsi, 0xcd, 0x00, 0x00, 0x02);
165 dsi_generic_write_seq(dsi, 0xce, 0x00, 0x00, 0x02);
166 dsi_generic_write_seq(dsi, 0xcf, 0x00, 0x00, 0x02);
167 dsi_generic_write_seq(dsi, 0xd1, 0x00, 0x05, 0x01, 0x07, 0x10);
168 dsi_generic_write_seq(dsi, 0xd2, 0x10, 0x05, 0x05, 0x03, 0x10);
169 dsi_generic_write_seq(dsi, 0xd3, 0x20, 0x00, 0x43, 0x07, 0x10);
170 dsi_generic_write_seq(dsi, 0xd4, 0x30, 0x00, 0x43, 0x07, 0x10);
171 dsi_generic_write_seq(dsi, 0xd0,
172 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
173 dsi_generic_write_seq(dsi, 0xd5,
174 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
175 0x00, 0x00, 0x00);
176 dsi_generic_write_seq(dsi, 0xd6,
177 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
178 0x00, 0x00, 0x00);
179 dsi_generic_write_seq(dsi, 0xd7,
180 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
181 0x00, 0x00, 0x00);
182 dsi_generic_write_seq(dsi, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00);
183 dsi_generic_write_seq(dsi, 0xe5, 0x06);
184 dsi_generic_write_seq(dsi, 0xe6, 0x06);
185 dsi_generic_write_seq(dsi, 0xe7, 0x00);
186 dsi_generic_write_seq(dsi, 0xe8, 0x06);
187 dsi_generic_write_seq(dsi, 0xe9, 0x06);
188 dsi_generic_write_seq(dsi, 0xea, 0x06);
189 dsi_generic_write_seq(dsi, 0xeb, 0x00);
190 dsi_generic_write_seq(dsi, 0xec, 0x00);
191 dsi_generic_write_seq(dsi, 0xed, 0x30);
192 dsi_generic_write_seq(dsi, 0xf0, 0x55, 0xaa, 0x52, 0x08, 0x06);
193 dsi_generic_write_seq(dsi, 0xb0, 0x31, 0x31);
194 dsi_generic_write_seq(dsi, 0xb1, 0x31, 0x31);
195 dsi_generic_write_seq(dsi, 0xb2, 0x2d, 0x2e);
196 dsi_generic_write_seq(dsi, 0xb3, 0x31, 0x34);
197 dsi_generic_write_seq(dsi, 0xb4, 0x29, 0x2a);
198 dsi_generic_write_seq(dsi, 0xb5, 0x12, 0x10);
199 dsi_generic_write_seq(dsi, 0xb6, 0x18, 0x16);
200 dsi_generic_write_seq(dsi, 0xb7, 0x00, 0x02);
201 dsi_generic_write_seq(dsi, 0xb8, 0x08, 0x31);
202 dsi_generic_write_seq(dsi, 0xb9, 0x31, 0x31);
203 dsi_generic_write_seq(dsi, 0xba, 0x31, 0x31);
204 dsi_generic_write_seq(dsi, 0xbb, 0x31, 0x08);
205 dsi_generic_write_seq(dsi, 0xbc, 0x03, 0x01);
206 dsi_generic_write_seq(dsi, 0xbd, 0x17, 0x19);
207 dsi_generic_write_seq(dsi, 0xbe, 0x11, 0x13);
208 dsi_generic_write_seq(dsi, 0xbf, 0x2a, 0x29);
209 dsi_generic_write_seq(dsi, 0xc0, 0x34, 0x31);
210 dsi_generic_write_seq(dsi, 0xc1, 0x2e, 0x2d);
211 dsi_generic_write_seq(dsi, 0xc2, 0x31, 0x31);
212 dsi_generic_write_seq(dsi, 0xc3, 0x31, 0x31);
213 dsi_generic_write_seq(dsi, 0xc4, 0x31, 0x31);
214 dsi_generic_write_seq(dsi, 0xc5, 0x31, 0x31);
215 dsi_generic_write_seq(dsi, 0xc6, 0x2e, 0x2d);
216 dsi_generic_write_seq(dsi, 0xc7, 0x31, 0x34);
217 dsi_generic_write_seq(dsi, 0xc8, 0x29, 0x2a);
218 dsi_generic_write_seq(dsi, 0xc9, 0x17, 0x19);
219 dsi_generic_write_seq(dsi, 0xca, 0x11, 0x13);
220 dsi_generic_write_seq(dsi, 0xcb, 0x03, 0x01);
221 dsi_generic_write_seq(dsi, 0xcc, 0x08, 0x31);
222 dsi_generic_write_seq(dsi, 0xcd, 0x31, 0x31);
223 dsi_generic_write_seq(dsi, 0xce, 0x31, 0x31);
224 dsi_generic_write_seq(dsi, 0xcf, 0x31, 0x08);
225 dsi_generic_write_seq(dsi, 0xd0, 0x00, 0x02);
226 dsi_generic_write_seq(dsi, 0xd1, 0x12, 0x10);
227 dsi_generic_write_seq(dsi, 0xd2, 0x18, 0x16);
228 dsi_generic_write_seq(dsi, 0xd3, 0x2a, 0x29);
229 dsi_generic_write_seq(dsi, 0xd4, 0x34, 0x31);
230 dsi_generic_write_seq(dsi, 0xd5, 0x2d, 0x2e);
231 dsi_generic_write_seq(dsi, 0xd6, 0x31, 0x31);
232 dsi_generic_write_seq(dsi, 0xd7, 0x31, 0x31);
233 dsi_generic_write_seq(dsi, 0xe5, 0x31, 0x31);
234 dsi_generic_write_seq(dsi, 0xe6, 0x31, 0x31);
235 dsi_generic_write_seq(dsi, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00);
236 dsi_generic_write_seq(dsi, 0xd9, 0x00, 0x00, 0x00, 0x00, 0x00);
237 dsi_generic_write_seq(dsi, 0xe7, 0x00);
238 dsi_generic_write_seq(dsi, 0x6f, 0x02);
239 dsi_generic_write_seq(dsi, 0xf7, 0x47);
240 dsi_generic_write_seq(dsi, 0x6f, 0x0a);
241 dsi_generic_write_seq(dsi, 0xf7, 0x02);
242 dsi_generic_write_seq(dsi, 0x6f, 0x17);
243 dsi_generic_write_seq(dsi, 0xf4, 0x60);
244 dsi_generic_write_seq(dsi, 0x6f, 0x01);
245 dsi_generic_write_seq(dsi, 0xf9, 0x46);
246 dsi_generic_write_seq(dsi, 0x6f, 0x11);
247 dsi_generic_write_seq(dsi, 0xf3, 0x01);
248 dsi_generic_write_seq(dsi, 0x35, 0x00);
249 dsi_generic_write_seq(dsi, 0xf0, 0x55, 0xaa, 0x52, 0x08, 0x00);
250 dsi_generic_write_seq(dsi, 0xd9, 0x02, 0x03, 0x00);
251 dsi_generic_write_seq(dsi, 0xf0, 0x55, 0xaa, 0x52, 0x00, 0x00);
252 dsi_generic_write_seq(dsi, 0xf0, 0x55, 0xaa, 0x52, 0x08, 0x00);
253 dsi_generic_write_seq(dsi, 0xb1, 0x6c, 0x21);
254 dsi_generic_write_seq(dsi, 0xf0, 0x55, 0xaa, 0x52, 0x00, 0x00);
255 dsi_generic_write_seq(dsi, 0x35, 0x00);
256
257 ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
258 if (ret < 0) {
259 dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
260 return ret;
261 }
262 msleep(120);
263
264 ret = mipi_dsi_dcs_set_display_on(dsi);
265 if (ret < 0) {
266 dev_err(dev, "Failed to set display on: %d\n", ret);
267 return ret;
268 }
269 usleep_range(1000, 2000);
270
271 dsi_generic_write_seq(dsi, 0x53, 0x24);
272
273 return 0;
274}
275
276static int truly_nt35521_off(struct truly_nt35521 *ctx)
277{
278 struct mipi_dsi_device *dsi = ctx->dsi;
279 struct device *dev = &dsi->dev;
280 int ret;
281
282 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
283
284 ret = mipi_dsi_dcs_set_display_off(dsi);
285 if (ret < 0) {
286 dev_err(dev, "Failed to set display off: %d\n", ret);
287 return ret;
288 }
289 msleep(50);
290
291 ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
292 if (ret < 0) {
293 dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
294 return ret;
295 }
296 msleep(150);
297
298 return 0;
299}
300
301static int truly_nt35521_prepare(struct drm_panel *panel)
302{
303 struct truly_nt35521 *ctx = to_truly_nt35521(panel);
304 struct device *dev = &ctx->dsi->dev;
305 int ret;
306
307 if (ctx->prepared)
308 return 0;
309
310 ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
311 if (ret < 0) {
312 dev_err(dev, "Failed to enable regulators: %d\n", ret);
313 return ret;
314 }
315
316 truly_nt35521_reset(ctx);
317
318 ret = truly_nt35521_on(ctx);
319 if (ret < 0) {
320 dev_err(dev, "Failed to initialize panel: %d\n", ret);
321 gpiod_set_value_cansleep(ctx->reset_gpio, 1);
322 return ret;
323 }
324
325 ctx->prepared = true;
326 return 0;
327}
328
329static int truly_nt35521_unprepare(struct drm_panel *panel)
330{
331 struct truly_nt35521 *ctx = to_truly_nt35521(panel);
332 struct device *dev = &ctx->dsi->dev;
333 int ret;
334
335 if (!ctx->prepared)
336 return 0;
337
338 ret = truly_nt35521_off(ctx);
339 if (ret < 0)
340 dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
341
342 gpiod_set_value_cansleep(ctx->reset_gpio, 1);
343 regulator_bulk_disable(ARRAY_SIZE(ctx->supplies),
344 ctx->supplies);
345
346 ctx->prepared = false;
347 return 0;
348}
349
350static int truly_nt35521_enable(struct drm_panel *panel)
351{
352 struct truly_nt35521 *ctx = to_truly_nt35521(panel);
353
354 if (ctx->enabled)
355 return 0;
356
357 gpiod_set_value_cansleep(ctx->blen_gpio, 1);
358
359 ctx->enabled = true;
360 return 0;
361}
362
363static int truly_nt35521_disable(struct drm_panel *panel)
364{
365 struct truly_nt35521 *ctx = to_truly_nt35521(panel);
366
367 if (!ctx->enabled)
368 return 0;
369
370 gpiod_set_value_cansleep(ctx->blen_gpio, 0);
371
372 ctx->enabled = false;
373 return 0;
374}
375
376static const struct drm_display_mode truly_nt35521_mode = {
377 .clock = (720 + 232 + 20 + 112) * (1280 + 18 + 1 + 18) * 60 / 1000,
378 .hdisplay = 720,
379 .hsync_start = 720 + 232,
380 .hsync_end = 720 + 232 + 20,
381 .htotal = 720 + 232 + 20 + 112,
382 .vdisplay = 1280,
383 .vsync_start = 1280 + 18,
384 .vsync_end = 1280 + 18 + 1,
385 .vtotal = 1280 + 18 + 1 + 18,
386 .width_mm = 65,
387 .height_mm = 116,
388};
389
390static int truly_nt35521_get_modes(struct drm_panel *panel,
391 struct drm_connector *connector)
392{
393 struct drm_display_mode *mode;
394
395 mode = drm_mode_duplicate(connector->dev, &truly_nt35521_mode);
396 if (!mode)
397 return -ENOMEM;
398
399 drm_mode_set_name(mode);
400
401 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
402 connector->display_info.width_mm = mode->width_mm;
403 connector->display_info.height_mm = mode->height_mm;
404 drm_mode_probed_add(connector, mode);
405
406 return 1;
407}
408
409static const struct drm_panel_funcs truly_nt35521_panel_funcs = {
410 .prepare = truly_nt35521_prepare,
411 .unprepare = truly_nt35521_unprepare,
412 .enable = truly_nt35521_enable,
413 .disable = truly_nt35521_disable,
414 .get_modes = truly_nt35521_get_modes,
415};
416
417static int truly_nt35521_bl_update_status(struct backlight_device *bl)
418{
419 struct mipi_dsi_device *dsi = bl_get_data(bl);
420 u16 brightness = backlight_get_brightness(bl);
421 int ret;
422
423 ret = mipi_dsi_dcs_set_display_brightness(dsi, brightness);
424 if (ret < 0)
425 return ret;
426
427 return 0;
428}
429
430static int truly_nt35521_bl_get_brightness(struct backlight_device *bl)
431{
432 struct mipi_dsi_device *dsi = bl_get_data(bl);
433 u16 brightness;
434 int ret;
435
436 ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);
437 if (ret < 0)
438 return ret;
439
440 return brightness & 0xff;
441}
442
443static const struct backlight_ops truly_nt35521_bl_ops = {
444 .update_status = truly_nt35521_bl_update_status,
445 .get_brightness = truly_nt35521_bl_get_brightness,
446};
447
448static struct backlight_device *
449truly_nt35521_create_backlight(struct mipi_dsi_device *dsi)
450{
451 struct device *dev = &dsi->dev;
452 const struct backlight_properties props = {
453 .type = BACKLIGHT_RAW,
454 .brightness = 255,
455 .max_brightness = 255,
456 };
457
458 return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
459 &truly_nt35521_bl_ops, &props);
460}
461
462static int truly_nt35521_probe(struct mipi_dsi_device *dsi)
463{
464 struct device *dev = &dsi->dev;
465 struct truly_nt35521 *ctx;
466 int ret;
467
468 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
469 if (!ctx)
470 return -ENOMEM;
471
472 ctx->supplies[0].supply = "positive5";
473 ctx->supplies[1].supply = "negative5";
474 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
475 ctx->supplies);
476 if (ret < 0) {
477 dev_err(dev, "Failed to get regulators: %d\n", ret);
478 return ret;
479 }
480
481 ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
482 if (IS_ERR(ctx->reset_gpio))
483 return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
484 "Failed to get reset-gpios\n");
485
486 ctx->blen_gpio = devm_gpiod_get(dev, "backlight", GPIOD_OUT_LOW);
487 if (IS_ERR(ctx->blen_gpio))
488 return dev_err_probe(dev, PTR_ERR(ctx->blen_gpio),
489 "Failed to get backlight-gpios\n");
490
491 ctx->dsi = dsi;
492 mipi_dsi_set_drvdata(dsi, ctx);
493
494 dsi->lanes = 4;
495 dsi->format = MIPI_DSI_FMT_RGB888;
496 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
497 MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_NO_EOT_PACKET |
498 MIPI_DSI_CLOCK_NON_CONTINUOUS;
499
500 drm_panel_init(&ctx->panel, dev, &truly_nt35521_panel_funcs,
501 DRM_MODE_CONNECTOR_DSI);
502
503 ctx->panel.backlight = truly_nt35521_create_backlight(dsi);
504 if (IS_ERR(ctx->panel.backlight))
505 return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
506 "Failed to create backlight\n");
507
508 drm_panel_add(&ctx->panel);
509
510 ret = mipi_dsi_attach(dsi);
511 if (ret < 0) {
512 dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
513 drm_panel_remove(&ctx->panel);
514 return ret;
515 }
516
517 return 0;
518}
519
520static void truly_nt35521_remove(struct mipi_dsi_device *dsi)
521{
522 struct truly_nt35521 *ctx = mipi_dsi_get_drvdata(dsi);
523 int ret;
524
525 ret = mipi_dsi_detach(dsi);
526 if (ret < 0)
527 dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
528
529 drm_panel_remove(&ctx->panel);
530}
531
532static const struct of_device_id truly_nt35521_of_match[] = {
533 { .compatible = "sony,tulip-truly-nt35521" },
534 { /* sentinel */ }
535};
536MODULE_DEVICE_TABLE(of, truly_nt35521_of_match);
537
538static struct mipi_dsi_driver truly_nt35521_driver = {
539 .probe = truly_nt35521_probe,
540 .remove = truly_nt35521_remove,
541 .driver = {
542 .name = "panel-truly-nt35521",
543 .of_match_table = truly_nt35521_of_match,
544 },
545};
546module_mipi_dsi_driver(truly_nt35521_driver);
547
548MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
549MODULE_DESCRIPTION("DRM driver for Sony Tulip Truly NT35521 panel");
550MODULE_LICENSE("GPL v2");