1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (c) 2020 Caleb Connolly <caleb@connolly.tech>
3 * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree:
4 * Copyright (c) 2020, The Linux Foundation. All rights reserved.
5 */
6
7 #include <linux/delay.h>
8 #include <linux/gpio/consumer.h>
9 #include <linux/module.h>
10 #include <linux/of.h>
11 #include <linux/of_device.h>
12 #include <linux/regulator/consumer.h>
13 #include <linux/backlight.h>
14
15 #include <video/mipi_display.h>
16
17 #include <drm/drm_mipi_dsi.h>
18 #include <drm/drm_modes.h>
19 #include <drm/drm_panel.h>
20
21 struct sofef00_panel {
22 struct drm_panel panel;
23 struct mipi_dsi_device *dsi;
24 struct regulator *supply;
25 struct gpio_desc *reset_gpio;
26 const struct drm_display_mode *mode;
27 bool prepared;
28 };
29
30 static inline
to_sofef00_panel(struct drm_panel * panel)31 struct sofef00_panel *to_sofef00_panel(struct drm_panel *panel)
32 {
33 return container_of(panel, struct sofef00_panel, panel);
34 }
35
sofef00_panel_reset(struct sofef00_panel * ctx)36 static void sofef00_panel_reset(struct sofef00_panel *ctx)
37 {
38 gpiod_set_value_cansleep(ctx->reset_gpio, 0);
39 usleep_range(5000, 6000);
40 gpiod_set_value_cansleep(ctx->reset_gpio, 1);
41 usleep_range(2000, 3000);
42 gpiod_set_value_cansleep(ctx->reset_gpio, 0);
43 usleep_range(12000, 13000);
44 }
45
sofef00_panel_on(struct sofef00_panel * ctx)46 static int sofef00_panel_on(struct sofef00_panel *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 ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
55 if (ret < 0) {
56 dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
57 return ret;
58 }
59 usleep_range(10000, 11000);
60
61 mipi_dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a);
62
63 ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
64 if (ret < 0) {
65 dev_err(dev, "Failed to set tear on: %d\n", ret);
66 return ret;
67 }
68
69 mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5);
70 mipi_dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a);
71 mipi_dsi_dcs_write_seq(dsi, 0xb0, 0x07);
72 mipi_dsi_dcs_write_seq(dsi, 0xb6, 0x12);
73 mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5);
74 mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
75 mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
76
77 ret = mipi_dsi_dcs_set_display_on(dsi);
78 if (ret < 0) {
79 dev_err(dev, "Failed to set display on: %d\n", ret);
80 return ret;
81 }
82
83 return 0;
84 }
85
sofef00_panel_off(struct sofef00_panel * ctx)86 static int sofef00_panel_off(struct sofef00_panel *ctx)
87 {
88 struct mipi_dsi_device *dsi = ctx->dsi;
89 struct device *dev = &dsi->dev;
90 int ret;
91
92 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
93
94 ret = mipi_dsi_dcs_set_display_off(dsi);
95 if (ret < 0) {
96 dev_err(dev, "Failed to set display off: %d\n", ret);
97 return ret;
98 }
99 msleep(40);
100
101 ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
102 if (ret < 0) {
103 dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
104 return ret;
105 }
106 msleep(160);
107
108 return 0;
109 }
110
sofef00_panel_prepare(struct drm_panel * panel)111 static int sofef00_panel_prepare(struct drm_panel *panel)
112 {
113 struct sofef00_panel *ctx = to_sofef00_panel(panel);
114 struct device *dev = &ctx->dsi->dev;
115 int ret;
116
117 if (ctx->prepared)
118 return 0;
119
120 ret = regulator_enable(ctx->supply);
121 if (ret < 0) {
122 dev_err(dev, "Failed to enable regulator: %d\n", ret);
123 return ret;
124 }
125
126 sofef00_panel_reset(ctx);
127
128 ret = sofef00_panel_on(ctx);
129 if (ret < 0) {
130 dev_err(dev, "Failed to initialize panel: %d\n", ret);
131 gpiod_set_value_cansleep(ctx->reset_gpio, 1);
132 return ret;
133 }
134
135 ctx->prepared = true;
136 return 0;
137 }
138
sofef00_panel_unprepare(struct drm_panel * panel)139 static int sofef00_panel_unprepare(struct drm_panel *panel)
140 {
141 struct sofef00_panel *ctx = to_sofef00_panel(panel);
142 struct device *dev = &ctx->dsi->dev;
143 int ret;
144
145 if (!ctx->prepared)
146 return 0;
147
148 ret = sofef00_panel_off(ctx);
149 if (ret < 0)
150 dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
151
152 regulator_disable(ctx->supply);
153
154 ctx->prepared = false;
155 return 0;
156 }
157
158 static const struct drm_display_mode enchilada_panel_mode = {
159 .clock = (1080 + 112 + 16 + 36) * (2280 + 36 + 8 + 12) * 60 / 1000,
160 .hdisplay = 1080,
161 .hsync_start = 1080 + 112,
162 .hsync_end = 1080 + 112 + 16,
163 .htotal = 1080 + 112 + 16 + 36,
164 .vdisplay = 2280,
165 .vsync_start = 2280 + 36,
166 .vsync_end = 2280 + 36 + 8,
167 .vtotal = 2280 + 36 + 8 + 12,
168 .width_mm = 68,
169 .height_mm = 145,
170 };
171
172 static const struct drm_display_mode fajita_panel_mode = {
173 .clock = (1080 + 72 + 16 + 36) * (2340 + 32 + 4 + 18) * 60 / 1000,
174 .hdisplay = 1080,
175 .hsync_start = 1080 + 72,
176 .hsync_end = 1080 + 72 + 16,
177 .htotal = 1080 + 72 + 16 + 36,
178 .vdisplay = 2340,
179 .vsync_start = 2340 + 32,
180 .vsync_end = 2340 + 32 + 4,
181 .vtotal = 2340 + 32 + 4 + 18,
182 .width_mm = 68,
183 .height_mm = 145,
184 };
185
sofef00_panel_get_modes(struct drm_panel * panel,struct drm_connector * connector)186 static int sofef00_panel_get_modes(struct drm_panel *panel, struct drm_connector *connector)
187 {
188 struct drm_display_mode *mode;
189 struct sofef00_panel *ctx = to_sofef00_panel(panel);
190
191 mode = drm_mode_duplicate(connector->dev, ctx->mode);
192 if (!mode)
193 return -ENOMEM;
194
195 drm_mode_set_name(mode);
196
197 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
198 connector->display_info.width_mm = mode->width_mm;
199 connector->display_info.height_mm = mode->height_mm;
200 drm_mode_probed_add(connector, mode);
201
202 return 1;
203 }
204
205 static const struct drm_panel_funcs sofef00_panel_panel_funcs = {
206 .prepare = sofef00_panel_prepare,
207 .unprepare = sofef00_panel_unprepare,
208 .get_modes = sofef00_panel_get_modes,
209 };
210
sofef00_panel_bl_update_status(struct backlight_device * bl)211 static int sofef00_panel_bl_update_status(struct backlight_device *bl)
212 {
213 struct mipi_dsi_device *dsi = bl_get_data(bl);
214 int err;
215 u16 brightness = (u16)backlight_get_brightness(bl);
216
217 err = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
218 if (err < 0)
219 return err;
220
221 return 0;
222 }
223
224 static const struct backlight_ops sofef00_panel_bl_ops = {
225 .update_status = sofef00_panel_bl_update_status,
226 };
227
228 static struct backlight_device *
sofef00_create_backlight(struct mipi_dsi_device * dsi)229 sofef00_create_backlight(struct mipi_dsi_device *dsi)
230 {
231 struct device *dev = &dsi->dev;
232 const struct backlight_properties props = {
233 .type = BACKLIGHT_PLATFORM,
234 .brightness = 1023,
235 .max_brightness = 1023,
236 };
237
238 return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
239 &sofef00_panel_bl_ops, &props);
240 }
241
sofef00_panel_probe(struct mipi_dsi_device * dsi)242 static int sofef00_panel_probe(struct mipi_dsi_device *dsi)
243 {
244 struct device *dev = &dsi->dev;
245 struct sofef00_panel *ctx;
246 int ret;
247
248 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
249 if (!ctx)
250 return -ENOMEM;
251
252 ctx->mode = of_device_get_match_data(dev);
253
254 if (!ctx->mode) {
255 dev_err(dev, "Missing device mode\n");
256 return -ENODEV;
257 }
258
259 ctx->supply = devm_regulator_get(dev, "vddio");
260 if (IS_ERR(ctx->supply))
261 return dev_err_probe(dev, PTR_ERR(ctx->supply),
262 "Failed to get vddio regulator\n");
263
264 ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
265 if (IS_ERR(ctx->reset_gpio))
266 return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
267 "Failed to get reset-gpios\n");
268
269 ctx->dsi = dsi;
270 mipi_dsi_set_drvdata(dsi, ctx);
271
272 dsi->lanes = 4;
273 dsi->format = MIPI_DSI_FMT_RGB888;
274
275 drm_panel_init(&ctx->panel, dev, &sofef00_panel_panel_funcs,
276 DRM_MODE_CONNECTOR_DSI);
277
278 ctx->panel.backlight = sofef00_create_backlight(dsi);
279 if (IS_ERR(ctx->panel.backlight))
280 return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
281 "Failed to create backlight\n");
282
283 drm_panel_add(&ctx->panel);
284
285 ret = mipi_dsi_attach(dsi);
286 if (ret < 0) {
287 dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
288 drm_panel_remove(&ctx->panel);
289 return ret;
290 }
291
292 return 0;
293 }
294
sofef00_panel_remove(struct mipi_dsi_device * dsi)295 static void sofef00_panel_remove(struct mipi_dsi_device *dsi)
296 {
297 struct sofef00_panel *ctx = mipi_dsi_get_drvdata(dsi);
298 int ret;
299
300 ret = mipi_dsi_detach(dsi);
301 if (ret < 0)
302 dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
303
304 drm_panel_remove(&ctx->panel);
305 }
306
307 static const struct of_device_id sofef00_panel_of_match[] = {
308 { // OnePlus 6 / enchilada
309 .compatible = "samsung,sofef00",
310 .data = &enchilada_panel_mode,
311 },
312 { // OnePlus 6T / fajita
313 .compatible = "samsung,s6e3fc2x01",
314 .data = &fajita_panel_mode,
315 },
316 { /* sentinel */ }
317 };
318 MODULE_DEVICE_TABLE(of, sofef00_panel_of_match);
319
320 static struct mipi_dsi_driver sofef00_panel_driver = {
321 .probe = sofef00_panel_probe,
322 .remove = sofef00_panel_remove,
323 .driver = {
324 .name = "panel-oneplus6",
325 .of_match_table = sofef00_panel_of_match,
326 },
327 };
328
329 module_mipi_dsi_driver(sofef00_panel_driver);
330
331 MODULE_AUTHOR("Caleb Connolly <caleb@connolly.tech>");
332 MODULE_DESCRIPTION("DRM driver for Samsung AMOLED DSI panels found in OnePlus 6/6T phones");
333 MODULE_LICENSE("GPL v2");
334