1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright (c) 2023, Linaro Limited
3
4 #include <linux/backlight.h>
5 #include <linux/delay.h>
6 #include <linux/gpio/consumer.h>
7 #include <linux/regulator/consumer.h>
8 #include <linux/module.h>
9 #include <linux/of.h>
10
11 #include <drm/display/drm_dsc.h>
12 #include <drm/drm_mipi_dsi.h>
13 #include <drm/drm_modes.h>
14 #include <drm/drm_panel.h>
15
16 #include <video/mipi_display.h>
17
18 struct visionox_vtdr6130 {
19 struct drm_panel panel;
20 struct mipi_dsi_device *dsi;
21 struct gpio_desc *reset_gpio;
22 struct regulator_bulk_data supplies[3];
23 bool prepared;
24 };
25
to_visionox_vtdr6130(struct drm_panel * panel)26 static inline struct visionox_vtdr6130 *to_visionox_vtdr6130(struct drm_panel *panel)
27 {
28 return container_of(panel, struct visionox_vtdr6130, panel);
29 }
30
visionox_vtdr6130_reset(struct visionox_vtdr6130 * ctx)31 static void visionox_vtdr6130_reset(struct visionox_vtdr6130 *ctx)
32 {
33 gpiod_set_value_cansleep(ctx->reset_gpio, 0);
34 usleep_range(10000, 11000);
35 gpiod_set_value_cansleep(ctx->reset_gpio, 1);
36 usleep_range(10000, 11000);
37 gpiod_set_value_cansleep(ctx->reset_gpio, 0);
38 usleep_range(10000, 11000);
39 }
40
visionox_vtdr6130_on(struct visionox_vtdr6130 * ctx)41 static int visionox_vtdr6130_on(struct visionox_vtdr6130 *ctx)
42 {
43 struct mipi_dsi_device *dsi = ctx->dsi;
44 struct device *dev = &dsi->dev;
45 int ret;
46
47 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
48
49 ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
50 if (ret)
51 return ret;
52
53 mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
54 mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS, 0x00, 0x00);
55 mipi_dsi_dcs_write_seq(dsi, 0x59, 0x09);
56 mipi_dsi_dcs_write_seq(dsi, 0x6c, 0x01);
57 mipi_dsi_dcs_write_seq(dsi, 0x6d, 0x00);
58 mipi_dsi_dcs_write_seq(dsi, 0x6f, 0x01);
59 mipi_dsi_dcs_write_seq(dsi, 0x70,
60 0x12, 0x00, 0x00, 0xab, 0x30, 0x80, 0x09, 0x60, 0x04,
61 0x38, 0x00, 0x28, 0x02, 0x1c, 0x02, 0x1c, 0x02, 0x00,
62 0x02, 0x0e, 0x00, 0x20, 0x03, 0xdd, 0x00, 0x07, 0x00,
63 0x0c, 0x02, 0x77, 0x02, 0x8b, 0x18, 0x00, 0x10, 0xf0,
64 0x07, 0x10, 0x20, 0x00, 0x06, 0x0f, 0x0f, 0x33, 0x0e,
65 0x1c, 0x2a, 0x38, 0x46, 0x54, 0x62, 0x69, 0x70, 0x77,
66 0x79, 0x7b, 0x7d, 0x7e, 0x02, 0x02, 0x22, 0x00, 0x2a,
67 0x40, 0x2a, 0xbe, 0x3a, 0xfc, 0x3a, 0xfa, 0x3a, 0xf8,
68 0x3b, 0x38, 0x3b, 0x78, 0x3b, 0xb6, 0x4b, 0xb6, 0x4b,
69 0xf4, 0x4b, 0xf4, 0x6c, 0x34, 0x84, 0x74, 0x00, 0x00,
70 0x00, 0x00, 0x00, 0x00);
71 mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xaa, 0x10);
72 mipi_dsi_dcs_write_seq(dsi, 0xb1,
73 0x01, 0x38, 0x00, 0x14, 0x00, 0x1c, 0x00, 0x01, 0x66,
74 0x00, 0x14, 0x00, 0x14, 0x00, 0x01, 0x66, 0x00, 0x14,
75 0x05, 0xcc, 0x00);
76 mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xaa, 0x13);
77 mipi_dsi_dcs_write_seq(dsi, 0xce,
78 0x09, 0x11, 0x09, 0x11, 0x08, 0xc1, 0x07, 0xfa, 0x05,
79 0xa4, 0x00, 0x3c, 0x00, 0x34, 0x00, 0x24, 0x00, 0x0c,
80 0x00, 0x0c, 0x04, 0x00, 0x35);
81 mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xaa, 0x14);
82 mipi_dsi_dcs_write_seq(dsi, 0xb2, 0x03, 0x33);
83 mipi_dsi_dcs_write_seq(dsi, 0xb4,
84 0x00, 0x33, 0x00, 0x00, 0x00, 0x3e, 0x00, 0x00, 0x00,
85 0x3e, 0x00, 0x00);
86 mipi_dsi_dcs_write_seq(dsi, 0xb5,
87 0x00, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x06, 0x01);
88 mipi_dsi_dcs_write_seq(dsi, 0xb9, 0x00, 0x00, 0x08, 0x09, 0x09, 0x09);
89 mipi_dsi_dcs_write_seq(dsi, 0xbc,
90 0x10, 0x00, 0x00, 0x06, 0x11, 0x09, 0x3b, 0x09, 0x47,
91 0x09, 0x47, 0x00);
92 mipi_dsi_dcs_write_seq(dsi, 0xbe,
93 0x10, 0x10, 0x00, 0x08, 0x22, 0x09, 0x19, 0x09, 0x25,
94 0x09, 0x25, 0x00);
95 mipi_dsi_dcs_write_seq(dsi, 0xff, 0x5a, 0x80);
96 mipi_dsi_dcs_write_seq(dsi, 0x65, 0x14);
97 mipi_dsi_dcs_write_seq(dsi, 0xfa, 0x08, 0x08, 0x08);
98 mipi_dsi_dcs_write_seq(dsi, 0xff, 0x5a, 0x81);
99 mipi_dsi_dcs_write_seq(dsi, 0x65, 0x05);
100 mipi_dsi_dcs_write_seq(dsi, 0xf3, 0x0f);
101 mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xaa, 0x00);
102 mipi_dsi_dcs_write_seq(dsi, 0xff, 0x5a, 0x82);
103 mipi_dsi_dcs_write_seq(dsi, 0xf9, 0x00);
104 mipi_dsi_dcs_write_seq(dsi, 0xff, 0x51, 0x83);
105 mipi_dsi_dcs_write_seq(dsi, 0x65, 0x04);
106 mipi_dsi_dcs_write_seq(dsi, 0xf8, 0x00);
107 mipi_dsi_dcs_write_seq(dsi, 0xff, 0x5a, 0x00);
108 mipi_dsi_dcs_write_seq(dsi, 0x65, 0x01);
109 mipi_dsi_dcs_write_seq(dsi, 0xf4, 0x9a);
110 mipi_dsi_dcs_write_seq(dsi, 0xff, 0x5a, 0x00);
111
112 ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
113 if (ret < 0) {
114 dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
115 return ret;
116 }
117 msleep(120);
118
119 ret = mipi_dsi_dcs_set_display_on(dsi);
120 if (ret < 0) {
121 dev_err(dev, "Failed to set display on: %d\n", ret);
122 return ret;
123 }
124 msleep(20);
125
126 return 0;
127 }
128
visionox_vtdr6130_off(struct visionox_vtdr6130 * ctx)129 static int visionox_vtdr6130_off(struct visionox_vtdr6130 *ctx)
130 {
131 struct mipi_dsi_device *dsi = ctx->dsi;
132 struct device *dev = &dsi->dev;
133 int ret;
134
135 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
136
137 ret = mipi_dsi_dcs_set_display_off(dsi);
138 if (ret < 0) {
139 dev_err(dev, "Failed to set display off: %d\n", ret);
140 return ret;
141 }
142 msleep(20);
143
144 ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
145 if (ret < 0) {
146 dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
147 return ret;
148 }
149 msleep(120);
150
151 return 0;
152 }
153
visionox_vtdr6130_prepare(struct drm_panel * panel)154 static int visionox_vtdr6130_prepare(struct drm_panel *panel)
155 {
156 struct visionox_vtdr6130 *ctx = to_visionox_vtdr6130(panel);
157 struct device *dev = &ctx->dsi->dev;
158 int ret;
159
160 if (ctx->prepared)
161 return 0;
162
163 ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies),
164 ctx->supplies);
165 if (ret < 0)
166 return ret;
167
168 visionox_vtdr6130_reset(ctx);
169
170 ret = visionox_vtdr6130_on(ctx);
171 if (ret < 0) {
172 dev_err(dev, "Failed to initialize panel: %d\n", ret);
173 gpiod_set_value_cansleep(ctx->reset_gpio, 1);
174 regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
175 return ret;
176 }
177
178 ctx->prepared = true;
179 return 0;
180 }
181
visionox_vtdr6130_unprepare(struct drm_panel * panel)182 static int visionox_vtdr6130_unprepare(struct drm_panel *panel)
183 {
184 struct visionox_vtdr6130 *ctx = to_visionox_vtdr6130(panel);
185 struct device *dev = &ctx->dsi->dev;
186 int ret;
187
188 if (!ctx->prepared)
189 return 0;
190
191 ret = visionox_vtdr6130_off(ctx);
192 if (ret < 0)
193 dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
194
195 gpiod_set_value_cansleep(ctx->reset_gpio, 1);
196
197 regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
198
199 ctx->prepared = false;
200 return 0;
201 }
202
203 static const struct drm_display_mode visionox_vtdr6130_mode = {
204 .clock = (1080 + 20 + 2 + 20) * (2400 + 20 + 2 + 18) * 144 / 1000,
205 .hdisplay = 1080,
206 .hsync_start = 1080 + 20,
207 .hsync_end = 1080 + 20 + 2,
208 .htotal = 1080 + 20 + 2 + 20,
209 .vdisplay = 2400,
210 .vsync_start = 2400 + 20,
211 .vsync_end = 2400 + 20 + 2,
212 .vtotal = 2400 + 20 + 2 + 18,
213 .width_mm = 71,
214 .height_mm = 157,
215 };
216
visionox_vtdr6130_get_modes(struct drm_panel * panel,struct drm_connector * connector)217 static int visionox_vtdr6130_get_modes(struct drm_panel *panel,
218 struct drm_connector *connector)
219 {
220 struct drm_display_mode *mode;
221
222 mode = drm_mode_duplicate(connector->dev, &visionox_vtdr6130_mode);
223 if (!mode)
224 return -ENOMEM;
225
226 drm_mode_set_name(mode);
227
228 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
229 connector->display_info.width_mm = mode->width_mm;
230 connector->display_info.height_mm = mode->height_mm;
231 drm_mode_probed_add(connector, mode);
232
233 return 1;
234 }
235
236 static const struct drm_panel_funcs visionox_vtdr6130_panel_funcs = {
237 .prepare = visionox_vtdr6130_prepare,
238 .unprepare = visionox_vtdr6130_unprepare,
239 .get_modes = visionox_vtdr6130_get_modes,
240 };
241
visionox_vtdr6130_bl_update_status(struct backlight_device * bl)242 static int visionox_vtdr6130_bl_update_status(struct backlight_device *bl)
243 {
244 struct mipi_dsi_device *dsi = bl_get_data(bl);
245 u16 brightness = backlight_get_brightness(bl);
246
247 return mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
248 }
249
250 static const struct backlight_ops visionox_vtdr6130_bl_ops = {
251 .update_status = visionox_vtdr6130_bl_update_status,
252 };
253
254 static struct backlight_device *
visionox_vtdr6130_create_backlight(struct mipi_dsi_device * dsi)255 visionox_vtdr6130_create_backlight(struct mipi_dsi_device *dsi)
256 {
257 struct device *dev = &dsi->dev;
258 const struct backlight_properties props = {
259 .type = BACKLIGHT_RAW,
260 .brightness = 4095,
261 .max_brightness = 4095,
262 };
263
264 return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
265 &visionox_vtdr6130_bl_ops, &props);
266 }
267
visionox_vtdr6130_probe(struct mipi_dsi_device * dsi)268 static int visionox_vtdr6130_probe(struct mipi_dsi_device *dsi)
269 {
270 struct device *dev = &dsi->dev;
271 struct visionox_vtdr6130 *ctx;
272 int ret;
273
274 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
275 if (!ctx)
276 return -ENOMEM;
277
278 ctx->supplies[0].supply = "vddio";
279 ctx->supplies[1].supply = "vci";
280 ctx->supplies[2].supply = "vdd";
281
282 ret = devm_regulator_bulk_get(&dsi->dev, ARRAY_SIZE(ctx->supplies),
283 ctx->supplies);
284 if (ret < 0)
285 return ret;
286
287 ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
288 if (IS_ERR(ctx->reset_gpio))
289 return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
290 "Failed to get reset-gpios\n");
291
292 ctx->dsi = dsi;
293 mipi_dsi_set_drvdata(dsi, ctx);
294
295 dsi->lanes = 4;
296 dsi->format = MIPI_DSI_FMT_RGB888;
297 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_NO_EOT_PACKET |
298 MIPI_DSI_CLOCK_NON_CONTINUOUS;
299
300 drm_panel_init(&ctx->panel, dev, &visionox_vtdr6130_panel_funcs,
301 DRM_MODE_CONNECTOR_DSI);
302
303 ctx->panel.backlight = visionox_vtdr6130_create_backlight(dsi);
304 if (IS_ERR(ctx->panel.backlight))
305 return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
306 "Failed to create backlight\n");
307
308 drm_panel_add(&ctx->panel);
309
310 ret = mipi_dsi_attach(dsi);
311 if (ret < 0) {
312 dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
313 drm_panel_remove(&ctx->panel);
314 return ret;
315 }
316
317 return 0;
318 }
319
visionox_vtdr6130_remove(struct mipi_dsi_device * dsi)320 static void visionox_vtdr6130_remove(struct mipi_dsi_device *dsi)
321 {
322 struct visionox_vtdr6130 *ctx = mipi_dsi_get_drvdata(dsi);
323 int ret;
324
325 ret = mipi_dsi_detach(dsi);
326 if (ret < 0)
327 dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
328
329 drm_panel_remove(&ctx->panel);
330 }
331
332 static const struct of_device_id visionox_vtdr6130_of_match[] = {
333 { .compatible = "visionox,vtdr6130" },
334 { /* sentinel */ }
335 };
336 MODULE_DEVICE_TABLE(of, visionox_vtdr6130_of_match);
337
338 static struct mipi_dsi_driver visionox_vtdr6130_driver = {
339 .probe = visionox_vtdr6130_probe,
340 .remove = visionox_vtdr6130_remove,
341 .driver = {
342 .name = "panel-visionox-vtdr6130",
343 .of_match_table = visionox_vtdr6130_of_match,
344 },
345 };
346 module_mipi_dsi_driver(visionox_vtdr6130_driver);
347
348 MODULE_AUTHOR("Neil Armstrong <neil.armstrong@linaro.org>");
349 MODULE_DESCRIPTION("Panel driver for the Visionox VTDR6130 AMOLED DSI panel");
350 MODULE_LICENSE("GPL");
351