1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree.
4 * Copyright (c) 2024 David Wronek <david@mainlining.org>
5 */
6
7 #include <linux/backlight.h>
8 #include <linux/delay.h>
9 #include <linux/gpio/consumer.h>
10 #include <linux/module.h>
11 #include <linux/of.h>
12 #include <linux/of_device.h>
13 #include <linux/of_graph.h>
14 #include <linux/regulator/consumer.h>
15
16 #include <video/mipi_display.h>
17
18 #include <drm/drm_mipi_dsi.h>
19 #include <drm/drm_modes.h>
20 #include <drm/drm_panel.h>
21 #include <drm/drm_probe_helper.h>
22
23 struct rm69380_panel {
24 struct drm_panel panel;
25 struct mipi_dsi_device *dsi[2];
26 struct regulator_bulk_data supplies[2];
27 struct gpio_desc *reset_gpio;
28 };
29
30 static inline
to_rm69380_panel(struct drm_panel * panel)31 struct rm69380_panel *to_rm69380_panel(struct drm_panel *panel)
32 {
33 return container_of(panel, struct rm69380_panel, panel);
34 }
35
rm69380_reset(struct rm69380_panel * ctx)36 static void rm69380_reset(struct rm69380_panel *ctx)
37 {
38 gpiod_set_value_cansleep(ctx->reset_gpio, 0);
39 usleep_range(15000, 16000);
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(30);
44 }
45
rm69380_on(struct rm69380_panel * ctx)46 static int rm69380_on(struct rm69380_panel *ctx)
47 {
48 struct mipi_dsi_device *dsi = ctx->dsi[0];
49 struct device *dev = &dsi->dev;
50 int ret;
51
52 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
53 if (ctx->dsi[1])
54 ctx->dsi[1]->mode_flags |= MIPI_DSI_MODE_LPM;
55
56 mipi_dsi_dcs_write_seq(dsi, 0xfe, 0xd4);
57 mipi_dsi_dcs_write_seq(dsi, 0x00, 0x80);
58 mipi_dsi_dcs_write_seq(dsi, 0xfe, 0xd0);
59 mipi_dsi_dcs_write_seq(dsi, 0x48, 0x00);
60 mipi_dsi_dcs_write_seq(dsi, 0xfe, 0x26);
61 mipi_dsi_dcs_write_seq(dsi, 0x75, 0x3f);
62 mipi_dsi_dcs_write_seq(dsi, 0x1d, 0x1a);
63 mipi_dsi_dcs_write_seq(dsi, 0xfe, 0x00);
64 mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x28);
65 mipi_dsi_dcs_write_seq(dsi, 0xc2, 0x08);
66
67 ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
68 if (ret < 0) {
69 dev_err(dev, "Failed to set tear on: %d\n", ret);
70 return ret;
71 }
72
73 ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
74 if (ret < 0) {
75 dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
76 return ret;
77 }
78 msleep(20);
79
80 ret = mipi_dsi_dcs_set_display_on(dsi);
81 if (ret < 0) {
82 dev_err(dev, "Failed to set display on: %d\n", ret);
83 return ret;
84 }
85 msleep(36);
86
87 return 0;
88 }
89
rm69380_off(struct rm69380_panel * ctx)90 static int rm69380_off(struct rm69380_panel *ctx)
91 {
92 struct mipi_dsi_device *dsi = ctx->dsi[0];
93 struct device *dev = &dsi->dev;
94 int ret;
95
96 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
97 if (ctx->dsi[1])
98 ctx->dsi[1]->mode_flags &= ~MIPI_DSI_MODE_LPM;
99
100 ret = mipi_dsi_dcs_set_display_off(dsi);
101 if (ret < 0) {
102 dev_err(dev, "Failed to set display off: %d\n", ret);
103 return ret;
104 }
105 msleep(35);
106
107 ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
108 if (ret < 0) {
109 dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
110 return ret;
111 }
112 msleep(20);
113
114 return 0;
115 }
116
rm69380_prepare(struct drm_panel * panel)117 static int rm69380_prepare(struct drm_panel *panel)
118 {
119 struct rm69380_panel *ctx = to_rm69380_panel(panel);
120 struct device *dev = &ctx->dsi[0]->dev;
121 int ret;
122
123 ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
124 if (ret < 0) {
125 dev_err(dev, "Failed to enable regulators: %d\n", ret);
126 return ret;
127 }
128
129 rm69380_reset(ctx);
130
131 ret = rm69380_on(ctx);
132 if (ret < 0) {
133 dev_err(dev, "Failed to initialize panel: %d\n", ret);
134 gpiod_set_value_cansleep(ctx->reset_gpio, 1);
135 regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
136 return ret;
137 }
138
139 return 0;
140 }
141
rm69380_unprepare(struct drm_panel * panel)142 static int rm69380_unprepare(struct drm_panel *panel)
143 {
144 struct rm69380_panel *ctx = to_rm69380_panel(panel);
145 struct device *dev = &ctx->dsi[0]->dev;
146 int ret;
147
148 ret = rm69380_off(ctx);
149 if (ret < 0)
150 dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
151
152 gpiod_set_value_cansleep(ctx->reset_gpio, 1);
153 regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
154
155 return 0;
156 }
157
158 static const struct drm_display_mode rm69380_mode = {
159 .clock = (2560 + 32 + 12 + 38) * (1600 + 20 + 4 + 8) * 90 / 1000,
160 .hdisplay = 2560,
161 .hsync_start = 2560 + 32,
162 .hsync_end = 2560 + 32 + 12,
163 .htotal = 2560 + 32 + 12 + 38,
164 .vdisplay = 1600,
165 .vsync_start = 1600 + 20,
166 .vsync_end = 1600 + 20 + 4,
167 .vtotal = 1600 + 20 + 4 + 8,
168 .width_mm = 248,
169 .height_mm = 155,
170 .type = DRM_MODE_TYPE_DRIVER,
171 };
172
rm69380_get_modes(struct drm_panel * panel,struct drm_connector * connector)173 static int rm69380_get_modes(struct drm_panel *panel,
174 struct drm_connector *connector)
175 {
176 return drm_connector_helper_get_modes_fixed(connector, &rm69380_mode);
177 }
178
179 static const struct drm_panel_funcs rm69380_panel_funcs = {
180 .prepare = rm69380_prepare,
181 .unprepare = rm69380_unprepare,
182 .get_modes = rm69380_get_modes,
183 };
184
rm69380_bl_update_status(struct backlight_device * bl)185 static int rm69380_bl_update_status(struct backlight_device *bl)
186 {
187 struct mipi_dsi_device *dsi = bl_get_data(bl);
188 u16 brightness = backlight_get_brightness(bl);
189 int ret;
190
191 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
192
193 ret = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
194 if (ret < 0)
195 return ret;
196
197 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
198
199 return 0;
200 }
201
rm69380_bl_get_brightness(struct backlight_device * bl)202 static int rm69380_bl_get_brightness(struct backlight_device *bl)
203 {
204 struct mipi_dsi_device *dsi = bl_get_data(bl);
205 u16 brightness;
206 int ret;
207
208 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
209
210 ret = mipi_dsi_dcs_get_display_brightness_large(dsi, &brightness);
211 if (ret < 0)
212 return ret;
213
214 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
215
216 return brightness;
217 }
218
219 static const struct backlight_ops rm69380_bl_ops = {
220 .update_status = rm69380_bl_update_status,
221 .get_brightness = rm69380_bl_get_brightness,
222 };
223
224 static struct backlight_device *
rm69380_create_backlight(struct mipi_dsi_device * dsi)225 rm69380_create_backlight(struct mipi_dsi_device *dsi)
226 {
227 struct device *dev = &dsi->dev;
228 const struct backlight_properties props = {
229 .type = BACKLIGHT_RAW,
230 .brightness = 511,
231 .max_brightness = 2047,
232 };
233
234 return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
235 &rm69380_bl_ops, &props);
236 }
237
rm69380_probe(struct mipi_dsi_device * dsi)238 static int rm69380_probe(struct mipi_dsi_device *dsi)
239 {
240 struct mipi_dsi_host *dsi_sec_host;
241 struct rm69380_panel *ctx;
242 struct device *dev = &dsi->dev;
243 struct device_node *dsi_sec;
244 int ret, i;
245
246 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
247 if (!ctx)
248 return -ENOMEM;
249
250 ctx->supplies[0].supply = "vddio";
251 ctx->supplies[1].supply = "avdd";
252 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
253 ctx->supplies);
254 if (ret < 0)
255 return dev_err_probe(dev, ret, "Failed to get regulators\n");
256
257 ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
258 if (IS_ERR(ctx->reset_gpio))
259 return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
260 "Failed to get reset-gpios\n");
261
262 dsi_sec = of_graph_get_remote_node(dsi->dev.of_node, 1, -1);
263
264 if (dsi_sec) {
265 const struct mipi_dsi_device_info info = { "RM69380 DSI1", 0,
266 dsi_sec };
267
268 dsi_sec_host = of_find_mipi_dsi_host_by_node(dsi_sec);
269 of_node_put(dsi_sec);
270 if (!dsi_sec_host)
271 return dev_err_probe(dev, -EPROBE_DEFER,
272 "Cannot get secondary DSI host\n");
273
274 ctx->dsi[1] =
275 devm_mipi_dsi_device_register_full(dev, dsi_sec_host, &info);
276 if (IS_ERR(ctx->dsi[1]))
277 return dev_err_probe(dev, PTR_ERR(ctx->dsi[1]),
278 "Cannot get secondary DSI node\n");
279
280 mipi_dsi_set_drvdata(ctx->dsi[1], ctx);
281 }
282
283 ctx->dsi[0] = dsi;
284 mipi_dsi_set_drvdata(dsi, ctx);
285
286 drm_panel_init(&ctx->panel, dev, &rm69380_panel_funcs,
287 DRM_MODE_CONNECTOR_DSI);
288 ctx->panel.prepare_prev_first = true;
289
290 ctx->panel.backlight = rm69380_create_backlight(dsi);
291 if (IS_ERR(ctx->panel.backlight))
292 return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
293 "Failed to create backlight\n");
294
295 drm_panel_add(&ctx->panel);
296
297 for (i = 0; i < ARRAY_SIZE(ctx->dsi); i++) {
298 if (!ctx->dsi[i])
299 continue;
300
301 dev_dbg(&ctx->dsi[i]->dev, "Binding DSI %d\n", i);
302
303 ctx->dsi[i]->lanes = 4;
304 ctx->dsi[i]->format = MIPI_DSI_FMT_RGB888;
305 ctx->dsi[i]->mode_flags = MIPI_DSI_MODE_VIDEO_BURST |
306 MIPI_DSI_CLOCK_NON_CONTINUOUS;
307
308 ret = devm_mipi_dsi_attach(dev, ctx->dsi[i]);
309 if (ret < 0) {
310 drm_panel_remove(&ctx->panel);
311 return dev_err_probe(dev, ret,
312 "Failed to attach to DSI%d\n", i);
313 }
314 }
315
316 return 0;
317 }
318
rm69380_remove(struct mipi_dsi_device * dsi)319 static void rm69380_remove(struct mipi_dsi_device *dsi)
320 {
321 struct rm69380_panel *ctx = mipi_dsi_get_drvdata(dsi);
322
323 drm_panel_remove(&ctx->panel);
324 }
325
326 static const struct of_device_id rm69380_of_match[] = {
327 { .compatible = "lenovo,j716f-edo-rm69380" },
328 { /* sentinel */ }
329 };
330 MODULE_DEVICE_TABLE(of, rm69380_of_match);
331
332 static struct mipi_dsi_driver rm69380_panel_driver = {
333 .probe = rm69380_probe,
334 .remove = rm69380_remove,
335 .driver = {
336 .name = "panel-raydium-rm69380",
337 .of_match_table = rm69380_of_match,
338 },
339 };
340 module_mipi_dsi_driver(rm69380_panel_driver);
341
342 MODULE_AUTHOR("David Wronek <david@mainlining.org");
343 MODULE_DESCRIPTION("DRM driver for Raydium RM69380-equipped DSI panels");
344 MODULE_LICENSE("GPL");
345