1// SPDX-License-Identifier: GPL-2.0-only
2// Copyright (c) 2023, Linaro Limited
3
4#include <linux/backlight.h>
5#include <linux/delay.h>
6#include <linux/gpio/consumer.h>
7#include <linux/regulator/consumer.h>
8#include <linux/module.h>
9#include <linux/of.h>
10
11#include <drm/display/drm_dsc.h>
12#include <drm/drm_mipi_dsi.h>
13#include <drm/drm_modes.h>
14#include <drm/drm_panel.h>
15
16#include <video/mipi_display.h>
17
18struct visionox_vtdr6130 {
19	struct drm_panel panel;
20	struct mipi_dsi_device *dsi;
21	struct gpio_desc *reset_gpio;
22	struct regulator_bulk_data supplies[3];
23};
24
25static inline struct visionox_vtdr6130 *to_visionox_vtdr6130(struct drm_panel *panel)
26{
27	return container_of(panel, struct visionox_vtdr6130, panel);
28}
29
30static void visionox_vtdr6130_reset(struct visionox_vtdr6130 *ctx)
31{
32	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
33	usleep_range(10000, 11000);
34	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
35	usleep_range(10000, 11000);
36	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
37	usleep_range(10000, 11000);
38}
39
40static int visionox_vtdr6130_on(struct visionox_vtdr6130 *ctx)
41{
42	struct mipi_dsi_device *dsi = ctx->dsi;
43	struct device *dev = &dsi->dev;
44	int ret;
45
46	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
47
48	ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
49	if (ret)
50		return ret;
51
52	mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
53	mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS, 0x00, 0x00);
54	mipi_dsi_dcs_write_seq(dsi, 0x59, 0x09);
55	mipi_dsi_dcs_write_seq(dsi, 0x6c, 0x01);
56	mipi_dsi_dcs_write_seq(dsi, 0x6d, 0x00);
57	mipi_dsi_dcs_write_seq(dsi, 0x6f, 0x01);
58	mipi_dsi_dcs_write_seq(dsi, 0x70,
59			       0x12, 0x00, 0x00, 0xab, 0x30, 0x80, 0x09, 0x60, 0x04,
60			       0x38, 0x00, 0x28, 0x02, 0x1c, 0x02, 0x1c, 0x02, 0x00,
61			       0x02, 0x0e, 0x00, 0x20, 0x03, 0xdd, 0x00, 0x07, 0x00,
62			       0x0c, 0x02, 0x77, 0x02, 0x8b, 0x18, 0x00, 0x10, 0xf0,
63			       0x07, 0x10, 0x20, 0x00, 0x06, 0x0f, 0x0f, 0x33, 0x0e,
64			       0x1c, 0x2a, 0x38, 0x46, 0x54, 0x62, 0x69, 0x70, 0x77,
65			       0x79, 0x7b, 0x7d, 0x7e, 0x02, 0x02, 0x22, 0x00, 0x2a,
66			       0x40, 0x2a, 0xbe, 0x3a, 0xfc, 0x3a, 0xfa, 0x3a, 0xf8,
67			       0x3b, 0x38, 0x3b, 0x78, 0x3b, 0xb6, 0x4b, 0xb6, 0x4b,
68			       0xf4, 0x4b, 0xf4, 0x6c, 0x34, 0x84, 0x74, 0x00, 0x00,
69			       0x00, 0x00, 0x00, 0x00);
70	mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xaa, 0x10);
71	mipi_dsi_dcs_write_seq(dsi, 0xb1,
72			       0x01, 0x38, 0x00, 0x14, 0x00, 0x1c, 0x00, 0x01, 0x66,
73			       0x00, 0x14, 0x00, 0x14, 0x00, 0x01, 0x66, 0x00, 0x14,
74			       0x05, 0xcc, 0x00);
75	mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xaa, 0x13);
76	mipi_dsi_dcs_write_seq(dsi, 0xce,
77			       0x09, 0x11, 0x09, 0x11, 0x08, 0xc1, 0x07, 0xfa, 0x05,
78			       0xa4, 0x00, 0x3c, 0x00, 0x34, 0x00, 0x24, 0x00, 0x0c,
79			       0x00, 0x0c, 0x04, 0x00, 0x35);
80	mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xaa, 0x14);
81	mipi_dsi_dcs_write_seq(dsi, 0xb2, 0x03, 0x33);
82	mipi_dsi_dcs_write_seq(dsi, 0xb4,
83			       0x00, 0x33, 0x00, 0x00, 0x00, 0x3e, 0x00, 0x00, 0x00,
84			       0x3e, 0x00, 0x00);
85	mipi_dsi_dcs_write_seq(dsi, 0xb5,
86			       0x00, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x06, 0x01);
87	mipi_dsi_dcs_write_seq(dsi, 0xb9, 0x00, 0x00, 0x08, 0x09, 0x09, 0x09);
88	mipi_dsi_dcs_write_seq(dsi, 0xbc,
89			       0x10, 0x00, 0x00, 0x06, 0x11, 0x09, 0x3b, 0x09, 0x47,
90			       0x09, 0x47, 0x00);
91	mipi_dsi_dcs_write_seq(dsi, 0xbe,
92			       0x10, 0x10, 0x00, 0x08, 0x22, 0x09, 0x19, 0x09, 0x25,
93			       0x09, 0x25, 0x00);
94	mipi_dsi_dcs_write_seq(dsi, 0xff, 0x5a, 0x80);
95	mipi_dsi_dcs_write_seq(dsi, 0x65, 0x14);
96	mipi_dsi_dcs_write_seq(dsi, 0xfa, 0x08, 0x08, 0x08);
97	mipi_dsi_dcs_write_seq(dsi, 0xff, 0x5a, 0x81);
98	mipi_dsi_dcs_write_seq(dsi, 0x65, 0x05);
99	mipi_dsi_dcs_write_seq(dsi, 0xf3, 0x0f);
100	mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xaa, 0x00);
101	mipi_dsi_dcs_write_seq(dsi, 0xff, 0x5a, 0x82);
102	mipi_dsi_dcs_write_seq(dsi, 0xf9, 0x00);
103	mipi_dsi_dcs_write_seq(dsi, 0xff, 0x51, 0x83);
104	mipi_dsi_dcs_write_seq(dsi, 0x65, 0x04);
105	mipi_dsi_dcs_write_seq(dsi, 0xf8, 0x00);
106	mipi_dsi_dcs_write_seq(dsi, 0xff, 0x5a, 0x00);
107	mipi_dsi_dcs_write_seq(dsi, 0x65, 0x01);
108	mipi_dsi_dcs_write_seq(dsi, 0xf4, 0x9a);
109	mipi_dsi_dcs_write_seq(dsi, 0xff, 0x5a, 0x00);
110
111	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
112	if (ret < 0) {
113		dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
114		return ret;
115	}
116	msleep(120);
117
118	ret = mipi_dsi_dcs_set_display_on(dsi);
119	if (ret < 0) {
120		dev_err(dev, "Failed to set display on: %d\n", ret);
121		return ret;
122	}
123	msleep(20);
124
125	return 0;
126}
127
128static int visionox_vtdr6130_off(struct visionox_vtdr6130 *ctx)
129{
130	struct mipi_dsi_device *dsi = ctx->dsi;
131	struct device *dev = &dsi->dev;
132	int ret;
133
134	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
135
136	ret = mipi_dsi_dcs_set_display_off(dsi);
137	if (ret < 0) {
138		dev_err(dev, "Failed to set display off: %d\n", ret);
139		return ret;
140	}
141	msleep(20);
142
143	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
144	if (ret < 0) {
145		dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
146		return ret;
147	}
148	msleep(120);
149
150	return 0;
151}
152
153static int visionox_vtdr6130_prepare(struct drm_panel *panel)
154{
155	struct visionox_vtdr6130 *ctx = to_visionox_vtdr6130(panel);
156	struct device *dev = &ctx->dsi->dev;
157	int ret;
158
159	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies),
160				    ctx->supplies);
161	if (ret < 0)
162		return ret;
163
164	visionox_vtdr6130_reset(ctx);
165
166	ret = visionox_vtdr6130_on(ctx);
167	if (ret < 0) {
168		dev_err(dev, "Failed to initialize panel: %d\n", ret);
169		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
170		regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
171		return ret;
172	}
173
174	return 0;
175}
176
177static int visionox_vtdr6130_unprepare(struct drm_panel *panel)
178{
179	struct visionox_vtdr6130 *ctx = to_visionox_vtdr6130(panel);
180	struct device *dev = &ctx->dsi->dev;
181	int ret;
182
183	ret = visionox_vtdr6130_off(ctx);
184	if (ret < 0)
185		dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
186
187	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
188
189	regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
190
191	return 0;
192}
193
194static const struct drm_display_mode visionox_vtdr6130_mode = {
195	.clock = (1080 + 20 + 2 + 20) * (2400 + 20 + 2 + 18) * 144 / 1000,
196	.hdisplay = 1080,
197	.hsync_start = 1080 + 20,
198	.hsync_end = 1080 + 20 + 2,
199	.htotal = 1080 + 20 + 2 + 20,
200	.vdisplay = 2400,
201	.vsync_start = 2400 + 20,
202	.vsync_end = 2400 + 20 + 2,
203	.vtotal = 2400 + 20 + 2 + 18,
204	.width_mm = 71,
205	.height_mm = 157,
206};
207
208static int visionox_vtdr6130_get_modes(struct drm_panel *panel,
209				       struct drm_connector *connector)
210{
211	struct drm_display_mode *mode;
212
213	mode = drm_mode_duplicate(connector->dev, &visionox_vtdr6130_mode);
214	if (!mode)
215		return -ENOMEM;
216
217	drm_mode_set_name(mode);
218
219	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
220	connector->display_info.width_mm = mode->width_mm;
221	connector->display_info.height_mm = mode->height_mm;
222	drm_mode_probed_add(connector, mode);
223
224	return 1;
225}
226
227static const struct drm_panel_funcs visionox_vtdr6130_panel_funcs = {
228	.prepare = visionox_vtdr6130_prepare,
229	.unprepare = visionox_vtdr6130_unprepare,
230	.get_modes = visionox_vtdr6130_get_modes,
231};
232
233static int visionox_vtdr6130_bl_update_status(struct backlight_device *bl)
234{
235	struct mipi_dsi_device *dsi = bl_get_data(bl);
236	u16 brightness = backlight_get_brightness(bl);
237
238	return mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
239}
240
241static const struct backlight_ops visionox_vtdr6130_bl_ops = {
242	.update_status = visionox_vtdr6130_bl_update_status,
243};
244
245static struct backlight_device *
246visionox_vtdr6130_create_backlight(struct mipi_dsi_device *dsi)
247{
248	struct device *dev = &dsi->dev;
249	const struct backlight_properties props = {
250		.type = BACKLIGHT_RAW,
251		.brightness = 4095,
252		.max_brightness = 4095,
253	};
254
255	return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
256					      &visionox_vtdr6130_bl_ops, &props);
257}
258
259static int visionox_vtdr6130_probe(struct mipi_dsi_device *dsi)
260{
261	struct device *dev = &dsi->dev;
262	struct visionox_vtdr6130 *ctx;
263	int ret;
264
265	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
266	if (!ctx)
267		return -ENOMEM;
268
269	ctx->supplies[0].supply = "vddio";
270	ctx->supplies[1].supply = "vci";
271	ctx->supplies[2].supply = "vdd";
272
273	ret = devm_regulator_bulk_get(&dsi->dev, ARRAY_SIZE(ctx->supplies),
274				      ctx->supplies);
275	if (ret < 0)
276		return ret;
277
278	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
279	if (IS_ERR(ctx->reset_gpio))
280		return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
281				     "Failed to get reset-gpios\n");
282
283	ctx->dsi = dsi;
284	mipi_dsi_set_drvdata(dsi, ctx);
285
286	dsi->lanes = 4;
287	dsi->format = MIPI_DSI_FMT_RGB888;
288	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_NO_EOT_PACKET |
289			  MIPI_DSI_CLOCK_NON_CONTINUOUS;
290	ctx->panel.prepare_prev_first = true;
291
292	drm_panel_init(&ctx->panel, dev, &visionox_vtdr6130_panel_funcs,
293		       DRM_MODE_CONNECTOR_DSI);
294
295	ctx->panel.backlight = visionox_vtdr6130_create_backlight(dsi);
296	if (IS_ERR(ctx->panel.backlight))
297		return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
298				     "Failed to create backlight\n");
299
300	drm_panel_add(&ctx->panel);
301
302	ret = mipi_dsi_attach(dsi);
303	if (ret < 0) {
304		dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
305		drm_panel_remove(&ctx->panel);
306		return ret;
307	}
308
309	return 0;
310}
311
312static void visionox_vtdr6130_remove(struct mipi_dsi_device *dsi)
313{
314	struct visionox_vtdr6130 *ctx = mipi_dsi_get_drvdata(dsi);
315	int ret;
316
317	ret = mipi_dsi_detach(dsi);
318	if (ret < 0)
319		dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
320
321	drm_panel_remove(&ctx->panel);
322}
323
324static const struct of_device_id visionox_vtdr6130_of_match[] = {
325	{ .compatible = "visionox,vtdr6130" },
326	{ /* sentinel */ }
327};
328MODULE_DEVICE_TABLE(of, visionox_vtdr6130_of_match);
329
330static struct mipi_dsi_driver visionox_vtdr6130_driver = {
331	.probe = visionox_vtdr6130_probe,
332	.remove = visionox_vtdr6130_remove,
333	.driver = {
334		.name = "panel-visionox-vtdr6130",
335		.of_match_table = visionox_vtdr6130_of_match,
336	},
337};
338module_mipi_dsi_driver(visionox_vtdr6130_driver);
339
340MODULE_AUTHOR("Neil Armstrong <neil.armstrong@linaro.org>");
341MODULE_DESCRIPTION("Panel driver for the Visionox VTDR6130 AMOLED DSI panel");
342MODULE_LICENSE("GPL");
343