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