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(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
46static 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
90static 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
117static 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
142static 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
158static 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
173static 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
179static const struct drm_panel_funcs rm69380_panel_funcs = {
180	.prepare = rm69380_prepare,
181	.unprepare = rm69380_unprepare,
182	.get_modes = rm69380_get_modes,
183};
184
185static 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
202static 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
219static const struct backlight_ops rm69380_bl_ops = {
220	.update_status = rm69380_bl_update_status,
221	.get_brightness = rm69380_bl_get_brightness,
222};
223
224static struct backlight_device *
225rm69380_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
238static 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
319static 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
326static const struct of_device_id rm69380_of_match[] = {
327	{ .compatible = "lenovo,j716f-edo-rm69380" },
328	{ /* sentinel */ }
329};
330MODULE_DEVICE_TABLE(of, rm69380_of_match);
331
332static 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};
340module_mipi_dsi_driver(rm69380_panel_driver);
341
342MODULE_AUTHOR("David Wronek <david@mainlining.org");
343MODULE_DESCRIPTION("DRM driver for Raydium RM69380-equipped DSI panels");
344MODULE_LICENSE("GPL");
345