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
23struct 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
30static inline
31struct rm69380_panel *to_rm69380_panel(struct drm_panel *panel)
32{
33 return container_of(panel, struct rm69380_panel, panel);
34}
35
36static void rm69380_reset(struct rm69380_panel *ctx)
37{
38 gpiod_set_value_cansleep(desc: ctx->reset_gpio, value: 0);
39 usleep_range(min: 15000, max: 16000);
40 gpiod_set_value_cansleep(desc: ctx->reset_gpio, value: 1);
41 usleep_range(min: 10000, max: 11000);
42 gpiod_set_value_cansleep(desc: ctx->reset_gpio, value: 0);
43 msleep(msecs: 30);
44}
45
46static int rm69380_on(struct rm69380_panel *ctx)
47{
48 struct mipi_dsi_device *dsi = ctx->dsi[0];
49 struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
50
51 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
52 if (ctx->dsi[1])
53 ctx->dsi[1]->mode_flags |= MIPI_DSI_MODE_LPM;
54
55 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfe, 0xd4);
56 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x00, 0x80);
57 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfe, 0xd0);
58 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x48, 0x00);
59 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfe, 0x26);
60 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x75, 0x3f);
61 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x1d, 0x1a);
62 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfe, 0x00);
63 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x28);
64 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xc2, 0x08);
65
66 mipi_dsi_dcs_set_tear_on_multi(ctx: &dsi_ctx, mode: MIPI_DSI_DCS_TEAR_MODE_VBLANK);
67 mipi_dsi_dcs_exit_sleep_mode_multi(ctx: &dsi_ctx);
68 mipi_dsi_msleep(&dsi_ctx, 20);
69
70 mipi_dsi_dcs_set_display_on_multi(ctx: &dsi_ctx);
71 mipi_dsi_msleep(&dsi_ctx, 36);
72
73 return dsi_ctx.accum_err;
74}
75
76static void rm69380_off(struct rm69380_panel *ctx)
77{
78 struct mipi_dsi_device *dsi = ctx->dsi[0];
79 struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
80
81 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
82 if (ctx->dsi[1])
83 ctx->dsi[1]->mode_flags &= ~MIPI_DSI_MODE_LPM;
84
85 mipi_dsi_dcs_set_display_off_multi(ctx: &dsi_ctx);
86 mipi_dsi_msleep(&dsi_ctx, 35);
87 mipi_dsi_dcs_enter_sleep_mode_multi(ctx: &dsi_ctx);
88 mipi_dsi_msleep(&dsi_ctx, 20);
89}
90
91static int rm69380_prepare(struct drm_panel *panel)
92{
93 struct rm69380_panel *ctx = to_rm69380_panel(panel);
94 int ret;
95
96 ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), consumers: ctx->supplies);
97 if (ret < 0)
98 return ret;
99
100 rm69380_reset(ctx);
101
102 ret = rm69380_on(ctx);
103 if (ret < 0) {
104 gpiod_set_value_cansleep(desc: ctx->reset_gpio, value: 1);
105 regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), consumers: ctx->supplies);
106 }
107
108 return ret;
109}
110
111static int rm69380_unprepare(struct drm_panel *panel)
112{
113 struct rm69380_panel *ctx = to_rm69380_panel(panel);
114
115 rm69380_off(ctx);
116
117 gpiod_set_value_cansleep(desc: ctx->reset_gpio, value: 1);
118 regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), consumers: ctx->supplies);
119
120 return 0;
121}
122
123static const struct drm_display_mode rm69380_mode = {
124 .clock = (2560 + 32 + 12 + 38) * (1600 + 20 + 4 + 8) * 90 / 1000,
125 .hdisplay = 2560,
126 .hsync_start = 2560 + 32,
127 .hsync_end = 2560 + 32 + 12,
128 .htotal = 2560 + 32 + 12 + 38,
129 .vdisplay = 1600,
130 .vsync_start = 1600 + 20,
131 .vsync_end = 1600 + 20 + 4,
132 .vtotal = 1600 + 20 + 4 + 8,
133 .width_mm = 248,
134 .height_mm = 155,
135 .type = DRM_MODE_TYPE_DRIVER,
136};
137
138static int rm69380_get_modes(struct drm_panel *panel,
139 struct drm_connector *connector)
140{
141 return drm_connector_helper_get_modes_fixed(connector, fixed_mode: &rm69380_mode);
142}
143
144static const struct drm_panel_funcs rm69380_panel_funcs = {
145 .prepare = rm69380_prepare,
146 .unprepare = rm69380_unprepare,
147 .get_modes = rm69380_get_modes,
148};
149
150static int rm69380_bl_update_status(struct backlight_device *bl)
151{
152 struct mipi_dsi_device *dsi = bl_get_data(bl_dev: bl);
153 u16 brightness = backlight_get_brightness(bd: bl);
154 int ret;
155
156 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
157
158 ret = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
159 if (ret < 0)
160 return ret;
161
162 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
163
164 return 0;
165}
166
167static int rm69380_bl_get_brightness(struct backlight_device *bl)
168{
169 struct mipi_dsi_device *dsi = bl_get_data(bl_dev: bl);
170 u16 brightness;
171 int ret;
172
173 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
174
175 ret = mipi_dsi_dcs_get_display_brightness_large(dsi, brightness: &brightness);
176 if (ret < 0)
177 return ret;
178
179 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
180
181 return brightness;
182}
183
184static const struct backlight_ops rm69380_bl_ops = {
185 .update_status = rm69380_bl_update_status,
186 .get_brightness = rm69380_bl_get_brightness,
187};
188
189static struct backlight_device *
190rm69380_create_backlight(struct mipi_dsi_device *dsi)
191{
192 struct device *dev = &dsi->dev;
193 const struct backlight_properties props = {
194 .type = BACKLIGHT_RAW,
195 .brightness = 511,
196 .max_brightness = 2047,
197 };
198
199 return devm_backlight_device_register(dev, name: dev_name(dev), parent: dev, devdata: dsi,
200 ops: &rm69380_bl_ops, props: &props);
201}
202
203static int rm69380_probe(struct mipi_dsi_device *dsi)
204{
205 struct mipi_dsi_host *dsi_sec_host;
206 struct rm69380_panel *ctx;
207 struct device *dev = &dsi->dev;
208 struct device_node *dsi_sec;
209 int ret, i;
210
211 ctx = devm_kzalloc(dev, size: sizeof(*ctx), GFP_KERNEL);
212 if (!ctx)
213 return -ENOMEM;
214
215 ctx->supplies[0].supply = "vddio";
216 ctx->supplies[1].supply = "avdd";
217 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
218 consumers: ctx->supplies);
219 if (ret < 0)
220 return dev_err_probe(dev, err: ret, fmt: "Failed to get regulators\n");
221
222 ctx->reset_gpio = devm_gpiod_get(dev, con_id: "reset", flags: GPIOD_OUT_HIGH);
223 if (IS_ERR(ptr: ctx->reset_gpio))
224 return dev_err_probe(dev, err: PTR_ERR(ptr: ctx->reset_gpio),
225 fmt: "Failed to get reset-gpios\n");
226
227 dsi_sec = of_graph_get_remote_node(node: dsi->dev.of_node, port: 1, endpoint: -1);
228
229 if (dsi_sec) {
230 const struct mipi_dsi_device_info info = { "RM69380 DSI1", 0,
231 dsi_sec };
232
233 dsi_sec_host = of_find_mipi_dsi_host_by_node(node: dsi_sec);
234 of_node_put(node: dsi_sec);
235 if (!dsi_sec_host)
236 return dev_err_probe(dev, err: -EPROBE_DEFER,
237 fmt: "Cannot get secondary DSI host\n");
238
239 ctx->dsi[1] =
240 devm_mipi_dsi_device_register_full(dev, host: dsi_sec_host, info: &info);
241 if (IS_ERR(ptr: ctx->dsi[1]))
242 return dev_err_probe(dev, err: PTR_ERR(ptr: ctx->dsi[1]),
243 fmt: "Cannot get secondary DSI node\n");
244
245 mipi_dsi_set_drvdata(dsi: ctx->dsi[1], data: ctx);
246 }
247
248 ctx->dsi[0] = dsi;
249 mipi_dsi_set_drvdata(dsi, data: ctx);
250
251 drm_panel_init(panel: &ctx->panel, dev, funcs: &rm69380_panel_funcs,
252 DRM_MODE_CONNECTOR_DSI);
253 ctx->panel.prepare_prev_first = true;
254
255 ctx->panel.backlight = rm69380_create_backlight(dsi);
256 if (IS_ERR(ptr: ctx->panel.backlight))
257 return dev_err_probe(dev, err: PTR_ERR(ptr: ctx->panel.backlight),
258 fmt: "Failed to create backlight\n");
259
260 drm_panel_add(panel: &ctx->panel);
261
262 for (i = 0; i < ARRAY_SIZE(ctx->dsi); i++) {
263 if (!ctx->dsi[i])
264 continue;
265
266 dev_dbg(&ctx->dsi[i]->dev, "Binding DSI %d\n", i);
267
268 ctx->dsi[i]->lanes = 4;
269 ctx->dsi[i]->format = MIPI_DSI_FMT_RGB888;
270 ctx->dsi[i]->mode_flags = MIPI_DSI_MODE_VIDEO_BURST |
271 MIPI_DSI_CLOCK_NON_CONTINUOUS;
272
273 ret = devm_mipi_dsi_attach(dev, dsi: ctx->dsi[i]);
274 if (ret < 0) {
275 drm_panel_remove(panel: &ctx->panel);
276 return dev_err_probe(dev, err: ret,
277 fmt: "Failed to attach to DSI%d\n", i);
278 }
279 }
280
281 return 0;
282}
283
284static void rm69380_remove(struct mipi_dsi_device *dsi)
285{
286 struct rm69380_panel *ctx = mipi_dsi_get_drvdata(dsi);
287
288 drm_panel_remove(panel: &ctx->panel);
289}
290
291static const struct of_device_id rm69380_of_match[] = {
292 { .compatible = "lenovo,j716f-edo-rm69380" },
293 { /* sentinel */ }
294};
295MODULE_DEVICE_TABLE(of, rm69380_of_match);
296
297static struct mipi_dsi_driver rm69380_panel_driver = {
298 .probe = rm69380_probe,
299 .remove = rm69380_remove,
300 .driver = {
301 .name = "panel-raydium-rm69380",
302 .of_match_table = rm69380_of_match,
303 },
304};
305module_mipi_dsi_driver(rm69380_panel_driver);
306
307MODULE_AUTHOR("David Wronek <david@mainlining.org");
308MODULE_DESCRIPTION("DRM driver for Raydium RM69380-equipped DSI panels");
309MODULE_LICENSE("GPL");
310

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source code of linux/drivers/gpu/drm/panel/panel-raydium-rm69380.c