1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Driver for the Samsung S6E3FA7 panel.
4 *
5 * Copyright (c) 2022-2024, The Linux Foundation. All rights reserved.
6 * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree:
7 * Copyright (c) 2013, The Linux Foundation. All rights reserved.
8 */
9
10#include <linux/backlight.h>
11#include <linux/delay.h>
12#include <linux/gpio/consumer.h>
13#include <linux/module.h>
14#include <linux/of.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
22struct s6e3fa7_panel {
23	struct drm_panel panel;
24	struct mipi_dsi_device *dsi;
25	struct gpio_desc *reset_gpio;
26};
27
28static inline struct s6e3fa7_panel *to_s6e3fa7_panel(struct drm_panel *panel)
29{
30	return container_of(panel, struct s6e3fa7_panel, panel);
31}
32
33static void s6e3fa7_panel_reset(struct s6e3fa7_panel *ctx)
34{
35	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
36	usleep_range(1000, 2000);
37	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
38	usleep_range(10000, 11000);
39}
40
41static int s6e3fa7_panel_on(struct s6e3fa7_panel *ctx)
42{
43	struct mipi_dsi_device *dsi = ctx->dsi;
44	struct device *dev = &dsi->dev;
45	int ret;
46
47	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
48	if (ret < 0) {
49		dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
50		return ret;
51	}
52	msleep(120);
53
54	ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
55	if (ret < 0) {
56		dev_err(dev, "Failed to set tear on: %d\n", ret);
57		return ret;
58	}
59
60	mipi_dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a);
61	mipi_dsi_dcs_write_seq(dsi, 0xf4,
62			       0xbb, 0x23, 0x19, 0x3a, 0x9f, 0x0f, 0x09, 0xc0,
63			       0x00, 0xb4, 0x37, 0x70, 0x79, 0x69);
64	mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5);
65	mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
66
67	ret = mipi_dsi_dcs_set_display_on(dsi);
68	if (ret < 0) {
69		dev_err(dev, "Failed to set display on: %d\n", ret);
70		return ret;
71	}
72
73	return 0;
74}
75
76static int s6e3fa7_panel_prepare(struct drm_panel *panel)
77{
78	struct s6e3fa7_panel *ctx = to_s6e3fa7_panel(panel);
79	struct device *dev = &ctx->dsi->dev;
80	int ret;
81
82	s6e3fa7_panel_reset(ctx);
83
84	ret = s6e3fa7_panel_on(ctx);
85	if (ret < 0) {
86		dev_err(dev, "Failed to initialize panel: %d\n", ret);
87		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
88		return ret;
89	}
90
91	return 0;
92}
93
94static int s6e3fa7_panel_unprepare(struct drm_panel *panel)
95{
96	struct s6e3fa7_panel *ctx = to_s6e3fa7_panel(panel);
97
98	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
99
100	return 0;
101}
102
103static int s6e3fa7_panel_disable(struct drm_panel *panel)
104{
105	struct s6e3fa7_panel *ctx = to_s6e3fa7_panel(panel);
106	struct mipi_dsi_device *dsi = ctx->dsi;
107	struct device *dev = &dsi->dev;
108	int ret;
109
110	ret = mipi_dsi_dcs_set_display_off(dsi);
111	if (ret < 0) {
112		dev_err(dev, "Failed to set display off: %d\n", ret);
113		return ret;
114	}
115
116	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
117	if (ret < 0) {
118		dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
119		return ret;
120	}
121	msleep(120);
122
123	return 0;
124}
125
126static const struct drm_display_mode s6e3fa7_panel_mode = {
127	.clock = (1080 + 32 + 32 + 78) * (2220 + 32 + 4 + 78) * 60 / 1000,
128	.hdisplay = 1080,
129	.hsync_start = 1080 + 32,
130	.hsync_end = 1080 + 32 + 32,
131	.htotal = 1080 + 32 + 32 + 78,
132	.vdisplay = 2220,
133	.vsync_start = 2220 + 32,
134	.vsync_end = 2220 + 32 + 4,
135	.vtotal = 2220 + 32 + 4 + 78,
136	.width_mm = 62,
137	.height_mm = 127,
138};
139
140static int s6e3fa7_panel_get_modes(struct drm_panel *panel,
141				 struct drm_connector *connector)
142{
143	struct drm_display_mode *mode;
144
145	mode = drm_mode_duplicate(connector->dev, &s6e3fa7_panel_mode);
146	if (!mode)
147		return -ENOMEM;
148
149	drm_mode_set_name(mode);
150
151	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
152	connector->display_info.width_mm = mode->width_mm;
153	connector->display_info.height_mm = mode->height_mm;
154	drm_mode_probed_add(connector, mode);
155
156	return 1;
157}
158
159static const struct drm_panel_funcs s6e3fa7_panel_funcs = {
160	.prepare = s6e3fa7_panel_prepare,
161	.unprepare = s6e3fa7_panel_unprepare,
162	.disable = s6e3fa7_panel_disable,
163	.get_modes = s6e3fa7_panel_get_modes,
164};
165
166static int s6e3fa7_panel_bl_update_status(struct backlight_device *bl)
167{
168	struct mipi_dsi_device *dsi = bl_get_data(bl);
169	u16 brightness = backlight_get_brightness(bl);
170	int ret;
171
172	ret = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
173	if (ret < 0)
174		return ret;
175
176	return 0;
177}
178
179static int s6e3fa7_panel_bl_get_brightness(struct backlight_device *bl)
180{
181	struct mipi_dsi_device *dsi = bl_get_data(bl);
182	u16 brightness;
183	int ret;
184
185	ret = mipi_dsi_dcs_get_display_brightness_large(dsi, &brightness);
186	if (ret < 0)
187		return ret;
188
189	return brightness;
190}
191
192static const struct backlight_ops s6e3fa7_panel_bl_ops = {
193	.update_status = s6e3fa7_panel_bl_update_status,
194	.get_brightness = s6e3fa7_panel_bl_get_brightness,
195};
196
197static struct backlight_device *
198s6e3fa7_panel_create_backlight(struct mipi_dsi_device *dsi)
199{
200	struct device *dev = &dsi->dev;
201	const struct backlight_properties props = {
202		.type = BACKLIGHT_RAW,
203		.brightness = 1023,
204		.max_brightness = 1023,
205	};
206
207	return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
208					      &s6e3fa7_panel_bl_ops, &props);
209}
210
211static int s6e3fa7_panel_probe(struct mipi_dsi_device *dsi)
212{
213	struct device *dev = &dsi->dev;
214	struct s6e3fa7_panel *ctx;
215	int ret;
216
217	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
218	if (!ctx)
219		return -ENOMEM;
220
221	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
222	if (IS_ERR(ctx->reset_gpio))
223		return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
224				     "Failed to get reset-gpios\n");
225
226	ctx->dsi = dsi;
227	mipi_dsi_set_drvdata(dsi, ctx);
228
229	dsi->lanes = 4;
230	dsi->format = MIPI_DSI_FMT_RGB888;
231	dsi->mode_flags = MIPI_DSI_MODE_VIDEO_BURST |
232			  MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM;
233
234	drm_panel_init(&ctx->panel, dev, &s6e3fa7_panel_funcs,
235		       DRM_MODE_CONNECTOR_DSI);
236	ctx->panel.prepare_prev_first = true;
237
238	ctx->panel.backlight = s6e3fa7_panel_create_backlight(dsi);
239	if (IS_ERR(ctx->panel.backlight))
240		return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
241				     "Failed to create backlight\n");
242
243	drm_panel_add(&ctx->panel);
244
245	ret = mipi_dsi_attach(dsi);
246	if (ret < 0) {
247		dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
248		drm_panel_remove(&ctx->panel);
249		return ret;
250	}
251
252	return 0;
253}
254
255static void s6e3fa7_panel_remove(struct mipi_dsi_device *dsi)
256{
257	struct s6e3fa7_panel *ctx = mipi_dsi_get_drvdata(dsi);
258	int ret;
259
260	ret = mipi_dsi_detach(dsi);
261	if (ret < 0)
262		dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
263
264	drm_panel_remove(&ctx->panel);
265}
266
267static const struct of_device_id s6e3fa7_panel_of_match[] = {
268	{ .compatible = "samsung,s6e3fa7-ams559nk06" },
269	{ /* sentinel */ }
270};
271MODULE_DEVICE_TABLE(of, s6e3fa7_panel_of_match);
272
273static struct mipi_dsi_driver s6e3fa7_panel_driver = {
274	.probe = s6e3fa7_panel_probe,
275	.remove = s6e3fa7_panel_remove,
276	.driver = {
277		.name = "panel-samsung-s6e3fa7",
278		.of_match_table = s6e3fa7_panel_of_match,
279	},
280};
281module_mipi_dsi_driver(s6e3fa7_panel_driver);
282
283MODULE_AUTHOR("Richard Acayan <mailingradian@gmail.com>");
284MODULE_DESCRIPTION("DRM driver for Samsung S6E3FA7 command mode DSI panel");
285MODULE_LICENSE("GPL");
286