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	bool prepared;
24};
25
26static inline struct visionox_vtdr6130 *to_visionox_vtdr6130(struct drm_panel *panel)
27{
28	return container_of(panel, struct visionox_vtdr6130, panel);
29}
30
31static void visionox_vtdr6130_reset(struct visionox_vtdr6130 *ctx)
32{
33	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
34	usleep_range(10000, 11000);
35	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
36	usleep_range(10000, 11000);
37	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
38	usleep_range(10000, 11000);
39}
40
41static int visionox_vtdr6130_on(struct visionox_vtdr6130 *ctx)
42{
43	struct mipi_dsi_device *dsi = ctx->dsi;
44	struct device *dev = &dsi->dev;
45	int ret;
46
47	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
48
49	ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
50	if (ret)
51		return ret;
52
53	mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
54	mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS, 0x00, 0x00);
55	mipi_dsi_dcs_write_seq(dsi, 0x59, 0x09);
56	mipi_dsi_dcs_write_seq(dsi, 0x6c, 0x01);
57	mipi_dsi_dcs_write_seq(dsi, 0x6d, 0x00);
58	mipi_dsi_dcs_write_seq(dsi, 0x6f, 0x01);
59	mipi_dsi_dcs_write_seq(dsi, 0x70,
60			       0x12, 0x00, 0x00, 0xab, 0x30, 0x80, 0x09, 0x60, 0x04,
61			       0x38, 0x00, 0x28, 0x02, 0x1c, 0x02, 0x1c, 0x02, 0x00,
62			       0x02, 0x0e, 0x00, 0x20, 0x03, 0xdd, 0x00, 0x07, 0x00,
63			       0x0c, 0x02, 0x77, 0x02, 0x8b, 0x18, 0x00, 0x10, 0xf0,
64			       0x07, 0x10, 0x20, 0x00, 0x06, 0x0f, 0x0f, 0x33, 0x0e,
65			       0x1c, 0x2a, 0x38, 0x46, 0x54, 0x62, 0x69, 0x70, 0x77,
66			       0x79, 0x7b, 0x7d, 0x7e, 0x02, 0x02, 0x22, 0x00, 0x2a,
67			       0x40, 0x2a, 0xbe, 0x3a, 0xfc, 0x3a, 0xfa, 0x3a, 0xf8,
68			       0x3b, 0x38, 0x3b, 0x78, 0x3b, 0xb6, 0x4b, 0xb6, 0x4b,
69			       0xf4, 0x4b, 0xf4, 0x6c, 0x34, 0x84, 0x74, 0x00, 0x00,
70			       0x00, 0x00, 0x00, 0x00);
71	mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xaa, 0x10);
72	mipi_dsi_dcs_write_seq(dsi, 0xb1,
73			       0x01, 0x38, 0x00, 0x14, 0x00, 0x1c, 0x00, 0x01, 0x66,
74			       0x00, 0x14, 0x00, 0x14, 0x00, 0x01, 0x66, 0x00, 0x14,
75			       0x05, 0xcc, 0x00);
76	mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xaa, 0x13);
77	mipi_dsi_dcs_write_seq(dsi, 0xce,
78			       0x09, 0x11, 0x09, 0x11, 0x08, 0xc1, 0x07, 0xfa, 0x05,
79			       0xa4, 0x00, 0x3c, 0x00, 0x34, 0x00, 0x24, 0x00, 0x0c,
80			       0x00, 0x0c, 0x04, 0x00, 0x35);
81	mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xaa, 0x14);
82	mipi_dsi_dcs_write_seq(dsi, 0xb2, 0x03, 0x33);
83	mipi_dsi_dcs_write_seq(dsi, 0xb4,
84			       0x00, 0x33, 0x00, 0x00, 0x00, 0x3e, 0x00, 0x00, 0x00,
85			       0x3e, 0x00, 0x00);
86	mipi_dsi_dcs_write_seq(dsi, 0xb5,
87			       0x00, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x06, 0x01);
88	mipi_dsi_dcs_write_seq(dsi, 0xb9, 0x00, 0x00, 0x08, 0x09, 0x09, 0x09);
89	mipi_dsi_dcs_write_seq(dsi, 0xbc,
90			       0x10, 0x00, 0x00, 0x06, 0x11, 0x09, 0x3b, 0x09, 0x47,
91			       0x09, 0x47, 0x00);
92	mipi_dsi_dcs_write_seq(dsi, 0xbe,
93			       0x10, 0x10, 0x00, 0x08, 0x22, 0x09, 0x19, 0x09, 0x25,
94			       0x09, 0x25, 0x00);
95	mipi_dsi_dcs_write_seq(dsi, 0xff, 0x5a, 0x80);
96	mipi_dsi_dcs_write_seq(dsi, 0x65, 0x14);
97	mipi_dsi_dcs_write_seq(dsi, 0xfa, 0x08, 0x08, 0x08);
98	mipi_dsi_dcs_write_seq(dsi, 0xff, 0x5a, 0x81);
99	mipi_dsi_dcs_write_seq(dsi, 0x65, 0x05);
100	mipi_dsi_dcs_write_seq(dsi, 0xf3, 0x0f);
101	mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xaa, 0x00);
102	mipi_dsi_dcs_write_seq(dsi, 0xff, 0x5a, 0x82);
103	mipi_dsi_dcs_write_seq(dsi, 0xf9, 0x00);
104	mipi_dsi_dcs_write_seq(dsi, 0xff, 0x51, 0x83);
105	mipi_dsi_dcs_write_seq(dsi, 0x65, 0x04);
106	mipi_dsi_dcs_write_seq(dsi, 0xf8, 0x00);
107	mipi_dsi_dcs_write_seq(dsi, 0xff, 0x5a, 0x00);
108	mipi_dsi_dcs_write_seq(dsi, 0x65, 0x01);
109	mipi_dsi_dcs_write_seq(dsi, 0xf4, 0x9a);
110	mipi_dsi_dcs_write_seq(dsi, 0xff, 0x5a, 0x00);
111
112	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
113	if (ret < 0) {
114		dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
115		return ret;
116	}
117	msleep(120);
118
119	ret = mipi_dsi_dcs_set_display_on(dsi);
120	if (ret < 0) {
121		dev_err(dev, "Failed to set display on: %d\n", ret);
122		return ret;
123	}
124	msleep(20);
125
126	return 0;
127}
128
129static int visionox_vtdr6130_off(struct visionox_vtdr6130 *ctx)
130{
131	struct mipi_dsi_device *dsi = ctx->dsi;
132	struct device *dev = &dsi->dev;
133	int ret;
134
135	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
136
137	ret = mipi_dsi_dcs_set_display_off(dsi);
138	if (ret < 0) {
139		dev_err(dev, "Failed to set display off: %d\n", ret);
140		return ret;
141	}
142	msleep(20);
143
144	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
145	if (ret < 0) {
146		dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
147		return ret;
148	}
149	msleep(120);
150
151	return 0;
152}
153
154static int visionox_vtdr6130_prepare(struct drm_panel *panel)
155{
156	struct visionox_vtdr6130 *ctx = to_visionox_vtdr6130(panel);
157	struct device *dev = &ctx->dsi->dev;
158	int ret;
159
160	if (ctx->prepared)
161		return 0;
162
163	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies),
164				    ctx->supplies);
165	if (ret < 0)
166		return ret;
167
168	visionox_vtdr6130_reset(ctx);
169
170	ret = visionox_vtdr6130_on(ctx);
171	if (ret < 0) {
172		dev_err(dev, "Failed to initialize panel: %d\n", ret);
173		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
174		regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
175		return ret;
176	}
177
178	ctx->prepared = true;
179	return 0;
180}
181
182static int visionox_vtdr6130_unprepare(struct drm_panel *panel)
183{
184	struct visionox_vtdr6130 *ctx = to_visionox_vtdr6130(panel);
185	struct device *dev = &ctx->dsi->dev;
186	int ret;
187
188	if (!ctx->prepared)
189		return 0;
190
191	ret = visionox_vtdr6130_off(ctx);
192	if (ret < 0)
193		dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
194
195	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
196
197	regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
198
199	ctx->prepared = false;
200	return 0;
201}
202
203static const struct drm_display_mode visionox_vtdr6130_mode = {
204	.clock = (1080 + 20 + 2 + 20) * (2400 + 20 + 2 + 18) * 144 / 1000,
205	.hdisplay = 1080,
206	.hsync_start = 1080 + 20,
207	.hsync_end = 1080 + 20 + 2,
208	.htotal = 1080 + 20 + 2 + 20,
209	.vdisplay = 2400,
210	.vsync_start = 2400 + 20,
211	.vsync_end = 2400 + 20 + 2,
212	.vtotal = 2400 + 20 + 2 + 18,
213	.width_mm = 71,
214	.height_mm = 157,
215};
216
217static int visionox_vtdr6130_get_modes(struct drm_panel *panel,
218				       struct drm_connector *connector)
219{
220	struct drm_display_mode *mode;
221
222	mode = drm_mode_duplicate(connector->dev, &visionox_vtdr6130_mode);
223	if (!mode)
224		return -ENOMEM;
225
226	drm_mode_set_name(mode);
227
228	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
229	connector->display_info.width_mm = mode->width_mm;
230	connector->display_info.height_mm = mode->height_mm;
231	drm_mode_probed_add(connector, mode);
232
233	return 1;
234}
235
236static const struct drm_panel_funcs visionox_vtdr6130_panel_funcs = {
237	.prepare = visionox_vtdr6130_prepare,
238	.unprepare = visionox_vtdr6130_unprepare,
239	.get_modes = visionox_vtdr6130_get_modes,
240};
241
242static int visionox_vtdr6130_bl_update_status(struct backlight_device *bl)
243{
244	struct mipi_dsi_device *dsi = bl_get_data(bl);
245	u16 brightness = backlight_get_brightness(bl);
246
247	return mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
248}
249
250static const struct backlight_ops visionox_vtdr6130_bl_ops = {
251	.update_status = visionox_vtdr6130_bl_update_status,
252};
253
254static struct backlight_device *
255visionox_vtdr6130_create_backlight(struct mipi_dsi_device *dsi)
256{
257	struct device *dev = &dsi->dev;
258	const struct backlight_properties props = {
259		.type = BACKLIGHT_RAW,
260		.brightness = 4095,
261		.max_brightness = 4095,
262	};
263
264	return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
265					      &visionox_vtdr6130_bl_ops, &props);
266}
267
268static int visionox_vtdr6130_probe(struct mipi_dsi_device *dsi)
269{
270	struct device *dev = &dsi->dev;
271	struct visionox_vtdr6130 *ctx;
272	int ret;
273
274	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
275	if (!ctx)
276		return -ENOMEM;
277
278	ctx->supplies[0].supply = "vddio";
279	ctx->supplies[1].supply = "vci";
280	ctx->supplies[2].supply = "vdd";
281
282	ret = devm_regulator_bulk_get(&dsi->dev, ARRAY_SIZE(ctx->supplies),
283				      ctx->supplies);
284	if (ret < 0)
285		return ret;
286
287	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
288	if (IS_ERR(ctx->reset_gpio))
289		return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
290				     "Failed to get reset-gpios\n");
291
292	ctx->dsi = dsi;
293	mipi_dsi_set_drvdata(dsi, ctx);
294
295	dsi->lanes = 4;
296	dsi->format = MIPI_DSI_FMT_RGB888;
297	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_NO_EOT_PACKET |
298			  MIPI_DSI_CLOCK_NON_CONTINUOUS;
299
300	drm_panel_init(&ctx->panel, dev, &visionox_vtdr6130_panel_funcs,
301		       DRM_MODE_CONNECTOR_DSI);
302
303	ctx->panel.backlight = visionox_vtdr6130_create_backlight(dsi);
304	if (IS_ERR(ctx->panel.backlight))
305		return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
306				     "Failed to create backlight\n");
307
308	drm_panel_add(&ctx->panel);
309
310	ret = mipi_dsi_attach(dsi);
311	if (ret < 0) {
312		dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
313		drm_panel_remove(&ctx->panel);
314		return ret;
315	}
316
317	return 0;
318}
319
320static void visionox_vtdr6130_remove(struct mipi_dsi_device *dsi)
321{
322	struct visionox_vtdr6130 *ctx = mipi_dsi_get_drvdata(dsi);
323	int ret;
324
325	ret = mipi_dsi_detach(dsi);
326	if (ret < 0)
327		dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
328
329	drm_panel_remove(&ctx->panel);
330}
331
332static const struct of_device_id visionox_vtdr6130_of_match[] = {
333	{ .compatible = "visionox,vtdr6130" },
334	{ /* sentinel */ }
335};
336MODULE_DEVICE_TABLE(of, visionox_vtdr6130_of_match);
337
338static struct mipi_dsi_driver visionox_vtdr6130_driver = {
339	.probe = visionox_vtdr6130_probe,
340	.remove = visionox_vtdr6130_remove,
341	.driver = {
342		.name = "panel-visionox-vtdr6130",
343		.of_match_table = visionox_vtdr6130_of_match,
344	},
345};
346module_mipi_dsi_driver(visionox_vtdr6130_driver);
347
348MODULE_AUTHOR("Neil Armstrong <neil.armstrong@linaro.org>");
349MODULE_DESCRIPTION("Panel driver for the Visionox VTDR6130 AMOLED DSI panel");
350MODULE_LICENSE("GPL");
351