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/regulator/consumer.h>
12#include <linux/backlight.h>
13
14#include <video/mipi_display.h>
15
16#include <drm/drm_mipi_dsi.h>
17#include <drm/drm_modes.h>
18#include <drm/drm_panel.h>
19
20struct sofef00_panel {
21	struct drm_panel panel;
22	struct mipi_dsi_device *dsi;
23	struct regulator *supply;
24	struct gpio_desc *reset_gpio;
25	const struct drm_display_mode *mode;
26	bool prepared;
27};
28
29static inline
30struct sofef00_panel *to_sofef00_panel(struct drm_panel *panel)
31{
32	return container_of(panel, struct sofef00_panel, panel);
33}
34
35static void sofef00_panel_reset(struct sofef00_panel *ctx)
36{
37	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
38	usleep_range(5000, 6000);
39	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
40	usleep_range(2000, 3000);
41	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
42	usleep_range(12000, 13000);
43}
44
45static int sofef00_panel_on(struct sofef00_panel *ctx)
46{
47	struct mipi_dsi_device *dsi = ctx->dsi;
48	struct device *dev = &dsi->dev;
49	int ret;
50
51	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
52
53	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
54	if (ret < 0) {
55		dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
56		return ret;
57	}
58	usleep_range(10000, 11000);
59
60	mipi_dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a);
61
62	ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
63	if (ret < 0) {
64		dev_err(dev, "Failed to set tear on: %d\n", ret);
65		return ret;
66	}
67
68	mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5);
69	mipi_dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a);
70	mipi_dsi_dcs_write_seq(dsi, 0xb0, 0x07);
71	mipi_dsi_dcs_write_seq(dsi, 0xb6, 0x12);
72	mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5);
73	mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
74	mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
75
76	ret = mipi_dsi_dcs_set_display_on(dsi);
77	if (ret < 0) {
78		dev_err(dev, "Failed to set display on: %d\n", ret);
79		return ret;
80	}
81
82	return 0;
83}
84
85static int sofef00_panel_off(struct sofef00_panel *ctx)
86{
87	struct mipi_dsi_device *dsi = ctx->dsi;
88	struct device *dev = &dsi->dev;
89	int ret;
90
91	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
92
93	ret = mipi_dsi_dcs_set_display_off(dsi);
94	if (ret < 0) {
95		dev_err(dev, "Failed to set display off: %d\n", ret);
96		return ret;
97	}
98	msleep(40);
99
100	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
101	if (ret < 0) {
102		dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
103		return ret;
104	}
105	msleep(160);
106
107	return 0;
108}
109
110static int sofef00_panel_prepare(struct drm_panel *panel)
111{
112	struct sofef00_panel *ctx = to_sofef00_panel(panel);
113	struct device *dev = &ctx->dsi->dev;
114	int ret;
115
116	if (ctx->prepared)
117		return 0;
118
119	ret = regulator_enable(ctx->supply);
120	if (ret < 0) {
121		dev_err(dev, "Failed to enable regulator: %d\n", ret);
122		return ret;
123	}
124
125	sofef00_panel_reset(ctx);
126
127	ret = sofef00_panel_on(ctx);
128	if (ret < 0) {
129		dev_err(dev, "Failed to initialize panel: %d\n", ret);
130		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
131		return ret;
132	}
133
134	ctx->prepared = true;
135	return 0;
136}
137
138static int sofef00_panel_unprepare(struct drm_panel *panel)
139{
140	struct sofef00_panel *ctx = to_sofef00_panel(panel);
141	struct device *dev = &ctx->dsi->dev;
142	int ret;
143
144	if (!ctx->prepared)
145		return 0;
146
147	ret = sofef00_panel_off(ctx);
148	if (ret < 0)
149		dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
150
151	regulator_disable(ctx->supply);
152
153	ctx->prepared = false;
154	return 0;
155}
156
157static const struct drm_display_mode enchilada_panel_mode = {
158	.clock = (1080 + 112 + 16 + 36) * (2280 + 36 + 8 + 12) * 60 / 1000,
159	.hdisplay = 1080,
160	.hsync_start = 1080 + 112,
161	.hsync_end = 1080 + 112 + 16,
162	.htotal = 1080 + 112 + 16 + 36,
163	.vdisplay = 2280,
164	.vsync_start = 2280 + 36,
165	.vsync_end = 2280 + 36 + 8,
166	.vtotal = 2280 + 36 + 8 + 12,
167	.width_mm = 68,
168	.height_mm = 145,
169};
170
171static const struct drm_display_mode fajita_panel_mode = {
172	.clock = (1080 + 72 + 16 + 36) * (2340 + 32 + 4 + 18) * 60 / 1000,
173	.hdisplay = 1080,
174	.hsync_start = 1080 + 72,
175	.hsync_end = 1080 + 72 + 16,
176	.htotal = 1080 + 72 + 16 + 36,
177	.vdisplay = 2340,
178	.vsync_start = 2340 + 32,
179	.vsync_end = 2340 + 32 + 4,
180	.vtotal = 2340 + 32 + 4 + 18,
181	.width_mm = 68,
182	.height_mm = 145,
183};
184
185static int sofef00_panel_get_modes(struct drm_panel *panel, struct drm_connector *connector)
186{
187	struct drm_display_mode *mode;
188	struct sofef00_panel *ctx = to_sofef00_panel(panel);
189
190	mode = drm_mode_duplicate(connector->dev, ctx->mode);
191	if (!mode)
192		return -ENOMEM;
193
194	drm_mode_set_name(mode);
195
196	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
197	connector->display_info.width_mm = mode->width_mm;
198	connector->display_info.height_mm = mode->height_mm;
199	drm_mode_probed_add(connector, mode);
200
201	return 1;
202}
203
204static const struct drm_panel_funcs sofef00_panel_panel_funcs = {
205	.prepare = sofef00_panel_prepare,
206	.unprepare = sofef00_panel_unprepare,
207	.get_modes = sofef00_panel_get_modes,
208};
209
210static int sofef00_panel_bl_update_status(struct backlight_device *bl)
211{
212	struct mipi_dsi_device *dsi = bl_get_data(bl);
213	int err;
214	u16 brightness = (u16)backlight_get_brightness(bl);
215
216	err = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
217	if (err < 0)
218		return err;
219
220	return 0;
221}
222
223static const struct backlight_ops sofef00_panel_bl_ops = {
224	.update_status = sofef00_panel_bl_update_status,
225};
226
227static struct backlight_device *
228sofef00_create_backlight(struct mipi_dsi_device *dsi)
229{
230	struct device *dev = &dsi->dev;
231	const struct backlight_properties props = {
232		.type = BACKLIGHT_PLATFORM,
233		.brightness = 1023,
234		.max_brightness = 1023,
235	};
236
237	return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
238					      &sofef00_panel_bl_ops, &props);
239}
240
241static int sofef00_panel_probe(struct mipi_dsi_device *dsi)
242{
243	struct device *dev = &dsi->dev;
244	struct sofef00_panel *ctx;
245	int ret;
246
247	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
248	if (!ctx)
249		return -ENOMEM;
250
251	ctx->mode = of_device_get_match_data(dev);
252
253	if (!ctx->mode) {
254		dev_err(dev, "Missing device mode\n");
255		return -ENODEV;
256	}
257
258	ctx->supply = devm_regulator_get(dev, "vddio");
259	if (IS_ERR(ctx->supply))
260		return dev_err_probe(dev, PTR_ERR(ctx->supply),
261				     "Failed to get vddio regulator\n");
262
263	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
264	if (IS_ERR(ctx->reset_gpio))
265		return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
266				     "Failed to get reset-gpios\n");
267
268	ctx->dsi = dsi;
269	mipi_dsi_set_drvdata(dsi, ctx);
270
271	dsi->lanes = 4;
272	dsi->format = MIPI_DSI_FMT_RGB888;
273
274	drm_panel_init(&ctx->panel, dev, &sofef00_panel_panel_funcs,
275		       DRM_MODE_CONNECTOR_DSI);
276
277	ctx->panel.backlight = sofef00_create_backlight(dsi);
278	if (IS_ERR(ctx->panel.backlight))
279		return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
280				     "Failed to create backlight\n");
281
282	drm_panel_add(&ctx->panel);
283
284	ret = mipi_dsi_attach(dsi);
285	if (ret < 0) {
286		dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
287		drm_panel_remove(&ctx->panel);
288		return ret;
289	}
290
291	return 0;
292}
293
294static void sofef00_panel_remove(struct mipi_dsi_device *dsi)
295{
296	struct sofef00_panel *ctx = mipi_dsi_get_drvdata(dsi);
297	int ret;
298
299	ret = mipi_dsi_detach(dsi);
300	if (ret < 0)
301		dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
302
303	drm_panel_remove(&ctx->panel);
304}
305
306static const struct of_device_id sofef00_panel_of_match[] = {
307	{ // OnePlus 6 / enchilada
308		.compatible = "samsung,sofef00",
309		.data = &enchilada_panel_mode,
310	},
311	{ // OnePlus 6T / fajita
312		.compatible = "samsung,s6e3fc2x01",
313		.data = &fajita_panel_mode,
314	},
315	{ /* sentinel */ }
316};
317MODULE_DEVICE_TABLE(of, sofef00_panel_of_match);
318
319static struct mipi_dsi_driver sofef00_panel_driver = {
320	.probe = sofef00_panel_probe,
321	.remove = sofef00_panel_remove,
322	.driver = {
323		.name = "panel-oneplus6",
324		.of_match_table = sofef00_panel_of_match,
325	},
326};
327
328module_mipi_dsi_driver(sofef00_panel_driver);
329
330MODULE_AUTHOR("Caleb Connolly <caleb@connolly.tech>");
331MODULE_DESCRIPTION("DRM driver for Samsung AMOLED DSI panels found in OnePlus 6/6T phones");
332MODULE_LICENSE("GPL v2");
333