1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2020 BSH Hausgerate GmbH
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/kernel.h>
11 #include <linux/module.h>
12 #include <linux/of.h>
13
14 #include <linux/gpio/consumer.h>
15 #include <linux/regulator/consumer.h>
16
17 #include <drm/drm_mipi_dsi.h>
18 #include <drm/drm_modes.h>
19 #include <drm/drm_panel.h>
20
21 #include <video/mipi_display.h>
22
23 #define ILI9805_EXTCMD_CMD_SET_ENABLE_REG (0xff)
24 #define ILI9805_SETEXTC_PARAMETER1 (0xff)
25 #define ILI9805_SETEXTC_PARAMETER2 (0x98)
26 #define ILI9805_SETEXTC_PARAMETER3 (0x05)
27
28 #define ILI9805_INSTR(_delay, ...) { \
29 .delay = (_delay), \
30 .len = sizeof((u8[]) {__VA_ARGS__}), \
31 .data = (u8[]){__VA_ARGS__} \
32 }
33
34 struct ili9805_instr {
35 size_t len;
36 const u8 *data;
37 u32 delay;
38 };
39
40 struct ili9805_desc {
41 const char *name;
42 const struct ili9805_instr *init;
43 const size_t init_length;
44 const struct drm_display_mode *mode;
45 u32 width_mm;
46 u32 height_mm;
47 };
48
49 struct ili9805 {
50 struct drm_panel panel;
51 struct mipi_dsi_device *dsi;
52 const struct ili9805_desc *desc;
53
54 struct regulator *dvdd;
55 struct regulator *avdd;
56 struct gpio_desc *reset_gpio;
57 };
58
59 static const struct ili9805_instr gpm1780a0_init[] = {
60 ILI9805_INSTR(100, ILI9805_EXTCMD_CMD_SET_ENABLE_REG, ILI9805_SETEXTC_PARAMETER1,
61 ILI9805_SETEXTC_PARAMETER2, ILI9805_SETEXTC_PARAMETER3),
62 ILI9805_INSTR(100, 0xFD, 0x0F, 0x10, 0x44, 0x00),
63 ILI9805_INSTR(0, 0xf8, 0x18, 0x02, 0x02, 0x18, 0x02, 0x02, 0x30, 0x00,
64 0x00, 0x30, 0x00, 0x00, 0x30, 0x00, 0x00),
65 ILI9805_INSTR(0, 0xB8, 0x62),
66 ILI9805_INSTR(0, 0xF1, 0x00),
67 ILI9805_INSTR(0, 0xF2, 0x00, 0x58, 0x40),
68 ILI9805_INSTR(0, 0xF3, 0x60, 0x83, 0x04),
69 ILI9805_INSTR(0, 0xFC, 0x04, 0x0F, 0x01),
70 ILI9805_INSTR(0, 0xEB, 0x08, 0x0F),
71 ILI9805_INSTR(0, 0xe0, 0x00, 0x08, 0x0d, 0x0e, 0x0e, 0x0d, 0x0a, 0x08, 0x04,
72 0x08, 0x0d, 0x0f, 0x0b, 0x1c, 0x14, 0x0a),
73 ILI9805_INSTR(0, 0xe1, 0x00, 0x08, 0x0d, 0x0e, 0x0e, 0x0d, 0x0a, 0x08, 0x04,
74 0x08, 0x0d, 0x0f, 0x0b, 0x1c, 0x14, 0x0a),
75 ILI9805_INSTR(10, 0xc1, 0x13, 0x39, 0x19, 0x06),
76 ILI9805_INSTR(10, 0xc7, 0xe5),
77 ILI9805_INSTR(10, 0xB1, 0x00, 0x12, 0x14),
78 ILI9805_INSTR(10, 0xB4, 0x02),
79 ILI9805_INSTR(0, 0xBB, 0x14, 0x55),
80 ILI9805_INSTR(0, MIPI_DCS_SET_ADDRESS_MODE, 0x08),
81 ILI9805_INSTR(0, MIPI_DCS_SET_PIXEL_FORMAT, 0x77),
82 ILI9805_INSTR(0, 0x20),
83 ILI9805_INSTR(0, 0xB0, 0x01),
84 ILI9805_INSTR(0, 0xB6, 0x31, 0x00, 0xef),
85 ILI9805_INSTR(0, 0xDF, 0x23),
86 ILI9805_INSTR(0, 0xB9, 0x02, 0x00),
87 };
88
89 static const struct ili9805_instr tm041xdhg01_init[] = {
90 ILI9805_INSTR(100, ILI9805_EXTCMD_CMD_SET_ENABLE_REG, ILI9805_SETEXTC_PARAMETER1,
91 ILI9805_SETEXTC_PARAMETER2, ILI9805_SETEXTC_PARAMETER3),
92 ILI9805_INSTR(100, 0xFD, 0x0F, 0x13, 0x44, 0x00),
93 ILI9805_INSTR(0, 0xf8, 0x18, 0x02, 0x02, 0x18, 0x02, 0x02, 0x30, 0x01,
94 0x01, 0x30, 0x01, 0x01, 0x30, 0x01, 0x01),
95 ILI9805_INSTR(0, 0xB8, 0x74),
96 ILI9805_INSTR(0, 0xF1, 0x00),
97 ILI9805_INSTR(0, 0xF2, 0x00, 0x58, 0x40),
98 ILI9805_INSTR(0, 0xFC, 0x04, 0x0F, 0x01),
99 ILI9805_INSTR(0, 0xEB, 0x08, 0x0F),
100 ILI9805_INSTR(0, 0xe0, 0x01, 0x0d, 0x15, 0x0e, 0x0f, 0x0f, 0x0b, 0x08, 0x04,
101 0x07, 0x0a, 0x0d, 0x0c, 0x15, 0x0f, 0x08),
102 ILI9805_INSTR(0, 0xe1, 0x01, 0x0d, 0x15, 0x0e, 0x0f, 0x0f, 0x0b, 0x08, 0x04,
103 0x07, 0x0a, 0x0d, 0x0c, 0x15, 0x0f, 0x08),
104 ILI9805_INSTR(10, 0xc1, 0x15, 0x03, 0x03, 0x31),
105 ILI9805_INSTR(10, 0xB1, 0x00, 0x12, 0x14),
106 ILI9805_INSTR(10, 0xB4, 0x02),
107 ILI9805_INSTR(0, 0xBB, 0x14, 0x55),
108 ILI9805_INSTR(0, MIPI_DCS_SET_ADDRESS_MODE, 0x0a),
109 ILI9805_INSTR(0, MIPI_DCS_SET_PIXEL_FORMAT, 0x77),
110 ILI9805_INSTR(0, 0x20),
111 ILI9805_INSTR(0, 0xB0, 0x00),
112 ILI9805_INSTR(0, 0xB6, 0x01),
113 ILI9805_INSTR(0, 0xc2, 0x11),
114 ILI9805_INSTR(0, 0x51, 0xFF),
115 ILI9805_INSTR(0, 0x53, 0x24),
116 ILI9805_INSTR(0, 0x55, 0x00),
117 };
118
panel_to_ili9805(struct drm_panel * panel)119 static inline struct ili9805 *panel_to_ili9805(struct drm_panel *panel)
120 {
121 return container_of(panel, struct ili9805, panel);
122 }
123
ili9805_power_on(struct ili9805 * ctx)124 static int ili9805_power_on(struct ili9805 *ctx)
125 {
126 struct mipi_dsi_device *dsi = ctx->dsi;
127 struct device *dev = &dsi->dev;
128 int ret;
129
130 ret = regulator_enable(ctx->avdd);
131 if (ret) {
132 dev_err(dev, "Failed to enable avdd regulator (%d)\n", ret);
133 return ret;
134 }
135
136 ret = regulator_enable(ctx->dvdd);
137 if (ret) {
138 dev_err(dev, "Failed to enable dvdd regulator (%d)\n", ret);
139 regulator_disable(ctx->avdd);
140 return ret;
141 }
142
143 gpiod_set_value(ctx->reset_gpio, 0);
144 usleep_range(5000, 10000);
145 gpiod_set_value(ctx->reset_gpio, 1);
146 msleep(120);
147
148 return 0;
149 }
150
ili9805_power_off(struct ili9805 * ctx)151 static int ili9805_power_off(struct ili9805 *ctx)
152 {
153 gpiod_set_value(ctx->reset_gpio, 0);
154 regulator_disable(ctx->dvdd);
155 regulator_disable(ctx->avdd);
156
157 return 0;
158 }
159
ili9805_activate(struct ili9805 * ctx)160 static int ili9805_activate(struct ili9805 *ctx)
161 {
162 struct mipi_dsi_device *dsi = ctx->dsi;
163 struct device *dev = &dsi->dev;
164 int i, ret;
165
166 for (i = 0; i < ctx->desc->init_length; i++) {
167 const struct ili9805_instr *instr = &ctx->desc->init[i];
168
169 ret = mipi_dsi_dcs_write_buffer(ctx->dsi, instr->data, instr->len);
170 if (ret < 0)
171 return ret;
172
173 if (instr->delay > 0)
174 msleep(instr->delay);
175 }
176
177 ret = mipi_dsi_dcs_exit_sleep_mode(ctx->dsi);
178 if (ret) {
179 dev_err(dev, "Failed to exit sleep mode (%d)\n", ret);
180 return ret;
181 }
182
183 usleep_range(5000, 6000);
184
185 ret = mipi_dsi_dcs_set_display_on(ctx->dsi);
186 if (ret) {
187 dev_err(dev, "Failed to set display ON (%d)\n", ret);
188 return ret;
189 }
190
191 return 0;
192 }
193
ili9805_prepare(struct drm_panel * panel)194 static int ili9805_prepare(struct drm_panel *panel)
195 {
196 struct ili9805 *ctx = panel_to_ili9805(panel);
197 int ret;
198
199 ret = ili9805_power_on(ctx);
200 if (ret)
201 return ret;
202
203 ret = ili9805_activate(ctx);
204 if (ret) {
205 ili9805_power_off(ctx);
206 return ret;
207 }
208
209 return 0;
210 }
211
ili9805_deactivate(struct ili9805 * ctx)212 static int ili9805_deactivate(struct ili9805 *ctx)
213 {
214 struct mipi_dsi_device *dsi = ctx->dsi;
215 struct device *dev = &dsi->dev;
216 int ret;
217
218 ret = mipi_dsi_dcs_set_display_off(ctx->dsi);
219 if (ret < 0) {
220 dev_err(dev, "Failed to set display OFF (%d)\n", ret);
221 return ret;
222 }
223
224 usleep_range(5000, 10000);
225
226 ret = mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
227 if (ret < 0) {
228 dev_err(dev, "Failed to enter sleep mode (%d)\n", ret);
229 return ret;
230 }
231
232 return 0;
233 }
234
ili9805_unprepare(struct drm_panel * panel)235 static int ili9805_unprepare(struct drm_panel *panel)
236 {
237 struct ili9805 *ctx = panel_to_ili9805(panel);
238
239 ili9805_deactivate(ctx);
240 ili9805_power_off(ctx);
241
242 return 0;
243 }
244
245 static const struct drm_display_mode gpm1780a0_timing = {
246 .clock = 26227,
247
248 .hdisplay = 480,
249 .hsync_start = 480 + 10,
250 .hsync_end = 480 + 10 + 2,
251 .htotal = 480 + 10 + 2 + 36,
252
253 .vdisplay = 480,
254 .vsync_start = 480 + 2,
255 .vsync_end = 480 + 10 + 4,
256 .vtotal = 480 + 2 + 4 + 10,
257 };
258
259 static const struct drm_display_mode tm041xdhg01_timing = {
260 .clock = 26227,
261
262 .hdisplay = 480,
263 .hsync_start = 480 + 10,
264 .hsync_end = 480 + 10 + 2,
265 .htotal = 480 + 10 + 2 + 36,
266
267 .vdisplay = 768,
268 .vsync_start = 768 + 2,
269 .vsync_end = 768 + 10 + 4,
270 .vtotal = 768 + 2 + 4 + 10,
271 };
272
ili9805_get_modes(struct drm_panel * panel,struct drm_connector * connector)273 static int ili9805_get_modes(struct drm_panel *panel,
274 struct drm_connector *connector)
275 {
276 struct ili9805 *ctx = panel_to_ili9805(panel);
277 struct drm_display_mode *mode;
278
279 mode = drm_mode_duplicate(connector->dev, ctx->desc->mode);
280 if (!mode) {
281 dev_err(&ctx->dsi->dev, "failed to add mode %ux%ux@%u\n",
282 ctx->desc->mode->hdisplay,
283 ctx->desc->mode->vdisplay,
284 drm_mode_vrefresh(ctx->desc->mode));
285 return -ENOMEM;
286 }
287
288 drm_mode_set_name(mode);
289
290 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
291 drm_mode_probed_add(connector, mode);
292
293 connector->display_info.width_mm = mode->width_mm;
294 connector->display_info.height_mm = mode->height_mm;
295
296 return 1;
297 }
298
299 static const struct drm_panel_funcs ili9805_funcs = {
300 .prepare = ili9805_prepare,
301 .unprepare = ili9805_unprepare,
302 .get_modes = ili9805_get_modes,
303 };
304
ili9805_dsi_probe(struct mipi_dsi_device * dsi)305 static int ili9805_dsi_probe(struct mipi_dsi_device *dsi)
306 {
307 struct ili9805 *ctx;
308 int ret;
309
310 ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);
311 if (!ctx)
312 return -ENOMEM;
313 mipi_dsi_set_drvdata(dsi, ctx);
314 ctx->dsi = dsi;
315 ctx->desc = of_device_get_match_data(&dsi->dev);
316
317 dsi->format = MIPI_DSI_FMT_RGB888;
318 dsi->mode_flags = MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO |
319 MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM |
320 MIPI_DSI_MODE_VIDEO_SYNC_PULSE | MIPI_DSI_MODE_NO_EOT_PACKET;
321 dsi->lanes = 2;
322
323 drm_panel_init(&ctx->panel, &dsi->dev, &ili9805_funcs,
324 DRM_MODE_CONNECTOR_DSI);
325
326 ctx->dvdd = devm_regulator_get(&dsi->dev, "dvdd");
327 if (IS_ERR(ctx->dvdd))
328 return PTR_ERR(ctx->dvdd);
329 ctx->avdd = devm_regulator_get(&dsi->dev, "avdd");
330 if (IS_ERR(ctx->avdd))
331 return PTR_ERR(ctx->avdd);
332
333 ctx->reset_gpio = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
334 if (IS_ERR(ctx->reset_gpio)) {
335 dev_err(&dsi->dev, "Couldn't get our reset GPIO\n");
336 return PTR_ERR(ctx->reset_gpio);
337 }
338
339 ctx->panel.prepare_prev_first = true;
340 ret = drm_panel_of_backlight(&ctx->panel);
341 if (ret)
342 return ret;
343
344 drm_panel_add(&ctx->panel);
345
346 ret = mipi_dsi_attach(dsi);
347 if (ret < 0) {
348 dev_err(&dsi->dev, "mipi_dsi_attach failed: %d\n", ret);
349 drm_panel_remove(&ctx->panel);
350 return ret;
351 }
352
353 return 0;
354 }
355
ili9805_dsi_remove(struct mipi_dsi_device * dsi)356 static void ili9805_dsi_remove(struct mipi_dsi_device *dsi)
357 {
358 struct ili9805 *ctx = mipi_dsi_get_drvdata(dsi);
359 int ret;
360
361 ret = mipi_dsi_detach(dsi);
362 if (ret < 0)
363 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n",
364 ret);
365
366 drm_panel_remove(&ctx->panel);
367 }
368
369 static const struct ili9805_desc gpm1780a0_desc = {
370 .init = gpm1780a0_init,
371 .init_length = ARRAY_SIZE(gpm1780a0_init),
372 .mode = &gpm1780a0_timing,
373 .width_mm = 65,
374 .height_mm = 65,
375 };
376
377 static const struct ili9805_desc tm041xdhg01_desc = {
378 .init = tm041xdhg01_init,
379 .init_length = ARRAY_SIZE(tm041xdhg01_init),
380 .mode = &tm041xdhg01_timing,
381 .width_mm = 42,
382 .height_mm = 96,
383 };
384
385 static const struct of_device_id ili9805_of_match[] = {
386 { .compatible = "giantplus,gpm1790a0", .data = &gpm1780a0_desc },
387 { .compatible = "tianma,tm041xdhg01", .data = &tm041xdhg01_desc },
388 { }
389 };
390 MODULE_DEVICE_TABLE(of, ili9805_of_match);
391
392 static struct mipi_dsi_driver ili9805_dsi_driver = {
393 .probe = ili9805_dsi_probe,
394 .remove = ili9805_dsi_remove,
395 .driver = {
396 .name = "ili9805-dsi",
397 .of_match_table = ili9805_of_match,
398 },
399 };
400 module_mipi_dsi_driver(ili9805_dsi_driver);
401
402 MODULE_AUTHOR("Matthias Proske <Matthias.Proske@bshg.com>");
403 MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
404 MODULE_DESCRIPTION("Ilitek ILI9805 Controller Driver");
405 MODULE_LICENSE("GPL");
406