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 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(&dsi_ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
 67	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
 68	mipi_dsi_msleep(&dsi_ctx, 20);
 69
 70	mipi_dsi_dcs_set_display_on_multi(&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(&dsi_ctx);
 86	mipi_dsi_msleep(&dsi_ctx, 35);
 87	mipi_dsi_dcs_enter_sleep_mode_multi(&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), 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(ctx->reset_gpio, 1);
105		regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), 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(ctx->reset_gpio, 1);
118	regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), 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, &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);
153	u16 brightness = backlight_get_brightness(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);
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);
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, dev_name(dev), dev, dsi,
200					      &rm69380_bl_ops, &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, 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				      ctx->supplies);
219	if (ret < 0)
220		return dev_err_probe(dev, ret, "Failed to get regulators\n");
221
222	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
223	if (IS_ERR(ctx->reset_gpio))
224		return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
225				     "Failed to get reset-gpios\n");
226
227	dsi_sec = of_graph_get_remote_node(dsi->dev.of_node, 1, -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(dsi_sec);
234		of_node_put(dsi_sec);
235		if (!dsi_sec_host)
236			return dev_err_probe(dev, -EPROBE_DEFER,
237					     "Cannot get secondary DSI host\n");
238
239		ctx->dsi[1] =
240			devm_mipi_dsi_device_register_full(dev, dsi_sec_host, &info);
241		if (IS_ERR(ctx->dsi[1]))
242			return dev_err_probe(dev, PTR_ERR(ctx->dsi[1]),
243					     "Cannot get secondary DSI node\n");
244
245		mipi_dsi_set_drvdata(ctx->dsi[1], ctx);
246	}
247
248	ctx->dsi[0] = dsi;
249	mipi_dsi_set_drvdata(dsi, ctx);
250
251	drm_panel_init(&ctx->panel, dev, &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(ctx->panel.backlight))
257		return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
258				     "Failed to create backlight\n");
259
260	drm_panel_add(&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, ctx->dsi[i]);
274		if (ret < 0) {
275			drm_panel_remove(&ctx->panel);
276			return dev_err_probe(dev, ret,
277					     "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(&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");