1// SPDX-License-Identifier: GPL-2.0-only
2
3#include <linux/backlight.h>
4#include <linux/delay.h>
5#include <linux/gpio/consumer.h>
6#include <linux/module.h>
7#include <linux/of.h>
8#include <linux/regulator/consumer.h>
9
10#include <drm/drm_mipi_dsi.h>
11#include <drm/drm_modes.h>
12#include <drm/drm_panel.h>
13
14struct tm5p5_nt35596 {
15	struct drm_panel panel;
16	struct mipi_dsi_device *dsi;
17	struct regulator_bulk_data supplies[2];
18	struct gpio_desc *reset_gpio;
19	bool prepared;
20};
21
22static inline struct tm5p5_nt35596 *to_tm5p5_nt35596(struct drm_panel *panel)
23{
24	return container_of(panel, struct tm5p5_nt35596, panel);
25}
26
27static void tm5p5_nt35596_reset(struct tm5p5_nt35596 *ctx)
28{
29	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
30	usleep_range(1000, 2000);
31	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
32	usleep_range(1000, 2000);
33	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
34	usleep_range(15000, 16000);
35}
36
37static int tm5p5_nt35596_on(struct tm5p5_nt35596 *ctx)
38{
39	struct mipi_dsi_device *dsi = ctx->dsi;
40
41	mipi_dsi_generic_write_seq(dsi, 0xff, 0x05);
42	mipi_dsi_generic_write_seq(dsi, 0xfb, 0x01);
43	mipi_dsi_generic_write_seq(dsi, 0xc5, 0x31);
44	mipi_dsi_generic_write_seq(dsi, 0xff, 0x04);
45	mipi_dsi_generic_write_seq(dsi, 0x01, 0x84);
46	mipi_dsi_generic_write_seq(dsi, 0x05, 0x25);
47	mipi_dsi_generic_write_seq(dsi, 0x06, 0x01);
48	mipi_dsi_generic_write_seq(dsi, 0x07, 0x20);
49	mipi_dsi_generic_write_seq(dsi, 0x08, 0x06);
50	mipi_dsi_generic_write_seq(dsi, 0x09, 0x08);
51	mipi_dsi_generic_write_seq(dsi, 0x0a, 0x10);
52	mipi_dsi_generic_write_seq(dsi, 0x0b, 0x10);
53	mipi_dsi_generic_write_seq(dsi, 0x0c, 0x10);
54	mipi_dsi_generic_write_seq(dsi, 0x0d, 0x14);
55	mipi_dsi_generic_write_seq(dsi, 0x0e, 0x14);
56	mipi_dsi_generic_write_seq(dsi, 0x0f, 0x14);
57	mipi_dsi_generic_write_seq(dsi, 0x10, 0x14);
58	mipi_dsi_generic_write_seq(dsi, 0x11, 0x14);
59	mipi_dsi_generic_write_seq(dsi, 0x12, 0x14);
60	mipi_dsi_generic_write_seq(dsi, 0x17, 0xf3);
61	mipi_dsi_generic_write_seq(dsi, 0x18, 0xc0);
62	mipi_dsi_generic_write_seq(dsi, 0x19, 0xc0);
63	mipi_dsi_generic_write_seq(dsi, 0x1a, 0xc0);
64	mipi_dsi_generic_write_seq(dsi, 0x1b, 0xb3);
65	mipi_dsi_generic_write_seq(dsi, 0x1c, 0xb3);
66	mipi_dsi_generic_write_seq(dsi, 0x1d, 0xb3);
67	mipi_dsi_generic_write_seq(dsi, 0x1e, 0xb3);
68	mipi_dsi_generic_write_seq(dsi, 0x1f, 0xb3);
69	mipi_dsi_generic_write_seq(dsi, 0x20, 0xb3);
70	mipi_dsi_generic_write_seq(dsi, 0xfb, 0x01);
71	mipi_dsi_generic_write_seq(dsi, 0xff, 0x00);
72	mipi_dsi_generic_write_seq(dsi, 0xfb, 0x01);
73	mipi_dsi_generic_write_seq(dsi, 0x35, 0x01);
74	mipi_dsi_generic_write_seq(dsi, 0xd3, 0x06);
75	mipi_dsi_generic_write_seq(dsi, 0xd4, 0x04);
76	mipi_dsi_generic_write_seq(dsi, 0x5e, 0x0d);
77	mipi_dsi_generic_write_seq(dsi, 0x11, 0x00);
78	msleep(100);
79	mipi_dsi_generic_write_seq(dsi, 0x29, 0x00);
80	mipi_dsi_generic_write_seq(dsi, 0x53, 0x24);
81
82	return 0;
83}
84
85static int tm5p5_nt35596_off(struct tm5p5_nt35596 *ctx)
86{
87	struct mipi_dsi_device *dsi = ctx->dsi;
88	struct device *dev = &dsi->dev;
89	int ret;
90
91	ret = mipi_dsi_dcs_set_display_off(dsi);
92	if (ret < 0) {
93		dev_err(dev, "Failed to set display off: %d\n", ret);
94		return ret;
95	}
96	msleep(60);
97
98	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
99	if (ret < 0) {
100		dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
101		return ret;
102	}
103
104	mipi_dsi_dcs_write_seq(dsi, 0x4f, 0x01);
105
106	return 0;
107}
108
109static int tm5p5_nt35596_prepare(struct drm_panel *panel)
110{
111	struct tm5p5_nt35596 *ctx = to_tm5p5_nt35596(panel);
112	struct device *dev = &ctx->dsi->dev;
113	int ret;
114
115	if (ctx->prepared)
116		return 0;
117
118	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
119	if (ret < 0) {
120		dev_err(dev, "Failed to enable regulators: %d\n", ret);
121		return ret;
122	}
123
124	tm5p5_nt35596_reset(ctx);
125
126	ret = tm5p5_nt35596_on(ctx);
127	if (ret < 0) {
128		dev_err(dev, "Failed to initialize panel: %d\n", ret);
129		gpiod_set_value_cansleep(ctx->reset_gpio, 0);
130		regulator_bulk_disable(ARRAY_SIZE(ctx->supplies),
131				       ctx->supplies);
132		return ret;
133	}
134
135	ctx->prepared = true;
136	return 0;
137}
138
139static int tm5p5_nt35596_unprepare(struct drm_panel *panel)
140{
141	struct tm5p5_nt35596 *ctx = to_tm5p5_nt35596(panel);
142	struct device *dev = &ctx->dsi->dev;
143	int ret;
144
145	if (!ctx->prepared)
146		return 0;
147
148	ret = tm5p5_nt35596_off(ctx);
149	if (ret < 0)
150		dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
151
152	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
153	regulator_bulk_disable(ARRAY_SIZE(ctx->supplies),
154			       ctx->supplies);
155
156	ctx->prepared = false;
157	return 0;
158}
159
160static const struct drm_display_mode tm5p5_nt35596_mode = {
161	.clock = (1080 + 100 + 8 + 16) * (1920 + 4 + 2 + 4) * 60 / 1000,
162	.hdisplay = 1080,
163	.hsync_start = 1080 + 100,
164	.hsync_end = 1080 + 100 + 8,
165	.htotal = 1080 + 100 + 8 + 16,
166	.vdisplay = 1920,
167	.vsync_start = 1920 + 4,
168	.vsync_end = 1920 + 4 + 2,
169	.vtotal = 1920 + 4 + 2 + 4,
170	.width_mm = 68,
171	.height_mm = 121,
172};
173
174static int tm5p5_nt35596_get_modes(struct drm_panel *panel,
175				   struct drm_connector *connector)
176{
177	struct drm_display_mode *mode;
178
179	mode = drm_mode_duplicate(connector->dev, &tm5p5_nt35596_mode);
180	if (!mode)
181		return -ENOMEM;
182
183	drm_mode_set_name(mode);
184
185	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
186	connector->display_info.width_mm = mode->width_mm;
187	connector->display_info.height_mm = mode->height_mm;
188	drm_mode_probed_add(connector, mode);
189
190	return 1;
191}
192
193static const struct drm_panel_funcs tm5p5_nt35596_panel_funcs = {
194	.prepare = tm5p5_nt35596_prepare,
195	.unprepare = tm5p5_nt35596_unprepare,
196	.get_modes = tm5p5_nt35596_get_modes,
197};
198
199static int tm5p5_nt35596_bl_update_status(struct backlight_device *bl)
200{
201	struct mipi_dsi_device *dsi = bl_get_data(bl);
202	u16 brightness = backlight_get_brightness(bl);
203	int ret;
204
205	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
206
207	ret = mipi_dsi_dcs_set_display_brightness(dsi, brightness);
208	if (ret < 0)
209		return ret;
210
211	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
212
213	return 0;
214}
215
216static int tm5p5_nt35596_bl_get_brightness(struct backlight_device *bl)
217{
218	struct mipi_dsi_device *dsi = bl_get_data(bl);
219	u16 brightness = bl->props.brightness;
220	int ret;
221
222	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
223
224	ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);
225	if (ret < 0)
226		return ret;
227
228	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
229
230	return brightness & 0xff;
231}
232
233static const struct backlight_ops tm5p5_nt35596_bl_ops = {
234	.update_status = tm5p5_nt35596_bl_update_status,
235	.get_brightness = tm5p5_nt35596_bl_get_brightness,
236};
237
238static struct backlight_device *
239tm5p5_nt35596_create_backlight(struct mipi_dsi_device *dsi)
240{
241	struct device *dev = &dsi->dev;
242	const struct backlight_properties props = {
243		.type = BACKLIGHT_RAW,
244		.brightness = 255,
245		.max_brightness = 255,
246	};
247
248	return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
249					      &tm5p5_nt35596_bl_ops, &props);
250}
251
252static int tm5p5_nt35596_probe(struct mipi_dsi_device *dsi)
253{
254	struct device *dev = &dsi->dev;
255	struct tm5p5_nt35596 *ctx;
256	int ret;
257
258	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
259	if (!ctx)
260		return -ENOMEM;
261
262	ctx->supplies[0].supply = "vdd";
263	ctx->supplies[1].supply = "vddio";
264	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
265				      ctx->supplies);
266	if (ret < 0) {
267		dev_err(dev, "Failed to get regulators: %d\n", ret);
268		return ret;
269	}
270
271	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
272	if (IS_ERR(ctx->reset_gpio)) {
273		ret = PTR_ERR(ctx->reset_gpio);
274		dev_err(dev, "Failed to get reset-gpios: %d\n", ret);
275		return ret;
276	}
277
278	ctx->dsi = dsi;
279	mipi_dsi_set_drvdata(dsi, ctx);
280
281	dsi->lanes = 4;
282	dsi->format = MIPI_DSI_FMT_RGB888;
283	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
284			  MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_NO_EOT_PACKET |
285			  MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM;
286
287	drm_panel_init(&ctx->panel, dev, &tm5p5_nt35596_panel_funcs,
288		       DRM_MODE_CONNECTOR_DSI);
289
290	ctx->panel.backlight = tm5p5_nt35596_create_backlight(dsi);
291	if (IS_ERR(ctx->panel.backlight)) {
292		ret = PTR_ERR(ctx->panel.backlight);
293		dev_err(dev, "Failed to create backlight: %d\n", ret);
294		return ret;
295	}
296
297	drm_panel_add(&ctx->panel);
298
299	ret = mipi_dsi_attach(dsi);
300	if (ret < 0) {
301		dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
302		return ret;
303	}
304
305	return 0;
306}
307
308static void tm5p5_nt35596_remove(struct mipi_dsi_device *dsi)
309{
310	struct tm5p5_nt35596 *ctx = mipi_dsi_get_drvdata(dsi);
311	int ret;
312
313	ret = mipi_dsi_detach(dsi);
314	if (ret < 0)
315		dev_err(&dsi->dev,
316			"Failed to detach from DSI host: %d\n", ret);
317
318	drm_panel_remove(&ctx->panel);
319}
320
321static const struct of_device_id tm5p5_nt35596_of_match[] = {
322	{ .compatible = "asus,z00t-tm5p5-n35596" },
323	{ /* sentinel */ }
324};
325MODULE_DEVICE_TABLE(of, tm5p5_nt35596_of_match);
326
327static struct mipi_dsi_driver tm5p5_nt35596_driver = {
328	.probe = tm5p5_nt35596_probe,
329	.remove = tm5p5_nt35596_remove,
330	.driver = {
331		.name = "panel-tm5p5-nt35596",
332		.of_match_table = tm5p5_nt35596_of_match,
333	},
334};
335module_mipi_dsi_driver(tm5p5_nt35596_driver);
336
337MODULE_AUTHOR("Konrad Dybcio <konradybcio@gmail.com>");
338MODULE_DESCRIPTION("DRM driver for tm5p5 nt35596 1080p video mode dsi panel");
339MODULE_LICENSE("GPL v2");
340