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 
14 struct 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 
22 static inline struct tm5p5_nt35596 *to_tm5p5_nt35596(struct drm_panel *panel)
23 {
24 	return container_of(panel, struct tm5p5_nt35596, panel);
25 }
26 
27 #define dsi_generic_write_seq(dsi, seq...) do {				\
28 		static const u8 d[] = { seq };				\
29 		int ret;						\
30 		ret = mipi_dsi_generic_write(dsi, d, ARRAY_SIZE(d));	\
31 		if (ret < 0)						\
32 			return ret;					\
33 	} while (0)
34 
35 #define dsi_dcs_write_seq(dsi, seq...) do {				\
36 		static const u8 d[] = { seq };				\
37 		int ret;						\
38 		ret = mipi_dsi_dcs_write_buffer(dsi, d, ARRAY_SIZE(d));	\
39 		if (ret < 0)						\
40 			return ret;					\
41 	} while (0)
42 
43 static void tm5p5_nt35596_reset(struct tm5p5_nt35596 *ctx)
44 {
45 	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
46 	usleep_range(1000, 2000);
47 	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
48 	usleep_range(1000, 2000);
49 	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
50 	usleep_range(15000, 16000);
51 }
52 
53 static int tm5p5_nt35596_on(struct tm5p5_nt35596 *ctx)
54 {
55 	struct mipi_dsi_device *dsi = ctx->dsi;
56 
57 	dsi_generic_write_seq(dsi, 0xff, 0x05);
58 	dsi_generic_write_seq(dsi, 0xfb, 0x01);
59 	dsi_generic_write_seq(dsi, 0xc5, 0x31);
60 	dsi_generic_write_seq(dsi, 0xff, 0x04);
61 	dsi_generic_write_seq(dsi, 0x01, 0x84);
62 	dsi_generic_write_seq(dsi, 0x05, 0x25);
63 	dsi_generic_write_seq(dsi, 0x06, 0x01);
64 	dsi_generic_write_seq(dsi, 0x07, 0x20);
65 	dsi_generic_write_seq(dsi, 0x08, 0x06);
66 	dsi_generic_write_seq(dsi, 0x09, 0x08);
67 	dsi_generic_write_seq(dsi, 0x0a, 0x10);
68 	dsi_generic_write_seq(dsi, 0x0b, 0x10);
69 	dsi_generic_write_seq(dsi, 0x0c, 0x10);
70 	dsi_generic_write_seq(dsi, 0x0d, 0x14);
71 	dsi_generic_write_seq(dsi, 0x0e, 0x14);
72 	dsi_generic_write_seq(dsi, 0x0f, 0x14);
73 	dsi_generic_write_seq(dsi, 0x10, 0x14);
74 	dsi_generic_write_seq(dsi, 0x11, 0x14);
75 	dsi_generic_write_seq(dsi, 0x12, 0x14);
76 	dsi_generic_write_seq(dsi, 0x17, 0xf3);
77 	dsi_generic_write_seq(dsi, 0x18, 0xc0);
78 	dsi_generic_write_seq(dsi, 0x19, 0xc0);
79 	dsi_generic_write_seq(dsi, 0x1a, 0xc0);
80 	dsi_generic_write_seq(dsi, 0x1b, 0xb3);
81 	dsi_generic_write_seq(dsi, 0x1c, 0xb3);
82 	dsi_generic_write_seq(dsi, 0x1d, 0xb3);
83 	dsi_generic_write_seq(dsi, 0x1e, 0xb3);
84 	dsi_generic_write_seq(dsi, 0x1f, 0xb3);
85 	dsi_generic_write_seq(dsi, 0x20, 0xb3);
86 	dsi_generic_write_seq(dsi, 0xfb, 0x01);
87 	dsi_generic_write_seq(dsi, 0xff, 0x00);
88 	dsi_generic_write_seq(dsi, 0xfb, 0x01);
89 	dsi_generic_write_seq(dsi, 0x35, 0x01);
90 	dsi_generic_write_seq(dsi, 0xd3, 0x06);
91 	dsi_generic_write_seq(dsi, 0xd4, 0x04);
92 	dsi_generic_write_seq(dsi, 0x5e, 0x0d);
93 	dsi_generic_write_seq(dsi, 0x11, 0x00);
94 	msleep(100);
95 	dsi_generic_write_seq(dsi, 0x29, 0x00);
96 	dsi_generic_write_seq(dsi, 0x53, 0x24);
97 
98 	return 0;
99 }
100 
101 static int tm5p5_nt35596_off(struct tm5p5_nt35596 *ctx)
102 {
103 	struct mipi_dsi_device *dsi = ctx->dsi;
104 	struct device *dev = &dsi->dev;
105 	int ret;
106 
107 	ret = mipi_dsi_dcs_set_display_off(dsi);
108 	if (ret < 0) {
109 		dev_err(dev, "Failed to set display off: %d\n", ret);
110 		return ret;
111 	}
112 	msleep(60);
113 
114 	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
115 	if (ret < 0) {
116 		dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
117 		return ret;
118 	}
119 
120 	dsi_dcs_write_seq(dsi, 0x4f, 0x01);
121 
122 	return 0;
123 }
124 
125 static int tm5p5_nt35596_prepare(struct drm_panel *panel)
126 {
127 	struct tm5p5_nt35596 *ctx = to_tm5p5_nt35596(panel);
128 	struct device *dev = &ctx->dsi->dev;
129 	int ret;
130 
131 	if (ctx->prepared)
132 		return 0;
133 
134 	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
135 	if (ret < 0) {
136 		dev_err(dev, "Failed to enable regulators: %d\n", ret);
137 		return ret;
138 	}
139 
140 	tm5p5_nt35596_reset(ctx);
141 
142 	ret = tm5p5_nt35596_on(ctx);
143 	if (ret < 0) {
144 		dev_err(dev, "Failed to initialize panel: %d\n", ret);
145 		gpiod_set_value_cansleep(ctx->reset_gpio, 0);
146 		regulator_bulk_disable(ARRAY_SIZE(ctx->supplies),
147 				       ctx->supplies);
148 		return ret;
149 	}
150 
151 	ctx->prepared = true;
152 	return 0;
153 }
154 
155 static int tm5p5_nt35596_unprepare(struct drm_panel *panel)
156 {
157 	struct tm5p5_nt35596 *ctx = to_tm5p5_nt35596(panel);
158 	struct device *dev = &ctx->dsi->dev;
159 	int ret;
160 
161 	if (!ctx->prepared)
162 		return 0;
163 
164 	ret = tm5p5_nt35596_off(ctx);
165 	if (ret < 0)
166 		dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
167 
168 	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
169 	regulator_bulk_disable(ARRAY_SIZE(ctx->supplies),
170 			       ctx->supplies);
171 
172 	ctx->prepared = false;
173 	return 0;
174 }
175 
176 static const struct drm_display_mode tm5p5_nt35596_mode = {
177 	.clock = (1080 + 100 + 8 + 16) * (1920 + 4 + 2 + 4) * 60 / 1000,
178 	.hdisplay = 1080,
179 	.hsync_start = 1080 + 100,
180 	.hsync_end = 1080 + 100 + 8,
181 	.htotal = 1080 + 100 + 8 + 16,
182 	.vdisplay = 1920,
183 	.vsync_start = 1920 + 4,
184 	.vsync_end = 1920 + 4 + 2,
185 	.vtotal = 1920 + 4 + 2 + 4,
186 	.width_mm = 68,
187 	.height_mm = 121,
188 };
189 
190 static int tm5p5_nt35596_get_modes(struct drm_panel *panel,
191 				   struct drm_connector *connector)
192 {
193 	struct drm_display_mode *mode;
194 
195 	mode = drm_mode_duplicate(connector->dev, &tm5p5_nt35596_mode);
196 	if (!mode)
197 		return -ENOMEM;
198 
199 	drm_mode_set_name(mode);
200 
201 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
202 	connector->display_info.width_mm = mode->width_mm;
203 	connector->display_info.height_mm = mode->height_mm;
204 	drm_mode_probed_add(connector, mode);
205 
206 	return 1;
207 }
208 
209 static const struct drm_panel_funcs tm5p5_nt35596_panel_funcs = {
210 	.prepare = tm5p5_nt35596_prepare,
211 	.unprepare = tm5p5_nt35596_unprepare,
212 	.get_modes = tm5p5_nt35596_get_modes,
213 };
214 
215 static int tm5p5_nt35596_bl_update_status(struct backlight_device *bl)
216 {
217 	struct mipi_dsi_device *dsi = bl_get_data(bl);
218 	u16 brightness = backlight_get_brightness(bl);
219 	int ret;
220 
221 	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
222 
223 	ret = mipi_dsi_dcs_set_display_brightness(dsi, brightness);
224 	if (ret < 0)
225 		return ret;
226 
227 	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
228 
229 	return 0;
230 }
231 
232 static int tm5p5_nt35596_bl_get_brightness(struct backlight_device *bl)
233 {
234 	struct mipi_dsi_device *dsi = bl_get_data(bl);
235 	u16 brightness = bl->props.brightness;
236 	int ret;
237 
238 	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
239 
240 	ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);
241 	if (ret < 0)
242 		return ret;
243 
244 	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
245 
246 	return brightness & 0xff;
247 }
248 
249 static const struct backlight_ops tm5p5_nt35596_bl_ops = {
250 	.update_status = tm5p5_nt35596_bl_update_status,
251 	.get_brightness = tm5p5_nt35596_bl_get_brightness,
252 };
253 
254 static struct backlight_device *
255 tm5p5_nt35596_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 = 255,
261 		.max_brightness = 255,
262 	};
263 
264 	return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
265 					      &tm5p5_nt35596_bl_ops, &props);
266 }
267 
268 static int tm5p5_nt35596_probe(struct mipi_dsi_device *dsi)
269 {
270 	struct device *dev = &dsi->dev;
271 	struct tm5p5_nt35596 *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 = "vdd";
279 	ctx->supplies[1].supply = "vddio";
280 	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
281 				      ctx->supplies);
282 	if (ret < 0) {
283 		dev_err(dev, "Failed to get regulators: %d\n", ret);
284 		return ret;
285 	}
286 
287 	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
288 	if (IS_ERR(ctx->reset_gpio)) {
289 		ret = PTR_ERR(ctx->reset_gpio);
290 		dev_err(dev, "Failed to get reset-gpios: %d\n", ret);
291 		return ret;
292 	}
293 
294 	ctx->dsi = dsi;
295 	mipi_dsi_set_drvdata(dsi, ctx);
296 
297 	dsi->lanes = 4;
298 	dsi->format = MIPI_DSI_FMT_RGB888;
299 	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
300 			  MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_NO_EOT_PACKET |
301 			  MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM;
302 
303 	drm_panel_init(&ctx->panel, dev, &tm5p5_nt35596_panel_funcs,
304 		       DRM_MODE_CONNECTOR_DSI);
305 
306 	ctx->panel.backlight = tm5p5_nt35596_create_backlight(dsi);
307 	if (IS_ERR(ctx->panel.backlight)) {
308 		ret = PTR_ERR(ctx->panel.backlight);
309 		dev_err(dev, "Failed to create backlight: %d\n", ret);
310 		return ret;
311 	}
312 
313 	drm_panel_add(&ctx->panel);
314 
315 	ret = mipi_dsi_attach(dsi);
316 	if (ret < 0) {
317 		dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
318 		return ret;
319 	}
320 
321 	return 0;
322 }
323 
324 static int tm5p5_nt35596_remove(struct mipi_dsi_device *dsi)
325 {
326 	struct tm5p5_nt35596 *ctx = mipi_dsi_get_drvdata(dsi);
327 	int ret;
328 
329 	ret = mipi_dsi_detach(dsi);
330 	if (ret < 0)
331 		dev_err(&dsi->dev,
332 			"Failed to detach from DSI host: %d\n", ret);
333 
334 	drm_panel_remove(&ctx->panel);
335 
336 	return 0;
337 }
338 
339 static const struct of_device_id tm5p5_nt35596_of_match[] = {
340 	{ .compatible = "asus,z00t-tm5p5-n35596" },
341 	{ /* sentinel */ }
342 };
343 MODULE_DEVICE_TABLE(of, tm5p5_nt35596_of_match);
344 
345 static struct mipi_dsi_driver tm5p5_nt35596_driver = {
346 	.probe = tm5p5_nt35596_probe,
347 	.remove = tm5p5_nt35596_remove,
348 	.driver = {
349 		.name = "panel-tm5p5-nt35596",
350 		.of_match_table = tm5p5_nt35596_of_match,
351 	},
352 };
353 module_mipi_dsi_driver(tm5p5_nt35596_driver);
354 
355 MODULE_AUTHOR("Konrad Dybcio <konradybcio@gmail.com>");
356 MODULE_DESCRIPTION("DRM driver for tm5p5 nt35596 1080p video mode dsi panel");
357 MODULE_LICENSE("GPL v2");
358