1
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
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
43static 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
53static 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
101static 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
125static 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
155static 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
176static 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
190static 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
209static 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
215static int tm5p5_nt35596_bl_update_status(struct backlight_device *bl)
216{
217 struct mipi_dsi_device *dsi = bl_get_data(bl);
218 u16 brightness = bl->props.brightness;
219 int ret;
220
221 if (bl->props.power != FB_BLANK_UNBLANK ||
222 bl->props.fb_blank != FB_BLANK_UNBLANK ||
223 bl->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
224 brightness = 0;
225
226 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
227
228 ret = mipi_dsi_dcs_set_display_brightness(dsi, brightness);
229 if (ret < 0)
230 return ret;
231
232 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
233
234 return 0;
235}
236
237static int tm5p5_nt35596_bl_get_brightness(struct backlight_device *bl)
238{
239 struct mipi_dsi_device *dsi = bl_get_data(bl);
240 u16 brightness = bl->props.brightness;
241 int ret;
242
243 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
244
245 ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);
246 if (ret < 0)
247 return ret;
248
249 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
250
251 return brightness & 0xff;
252}
253
254static const struct backlight_ops tm5p5_nt35596_bl_ops = {
255 .update_status = tm5p5_nt35596_bl_update_status,
256 .get_brightness = tm5p5_nt35596_bl_get_brightness,
257};
258
259static struct backlight_device *
260tm5p5_nt35596_create_backlight(struct mipi_dsi_device *dsi)
261{
262 struct device *dev = &dsi->dev;
263 const struct backlight_properties props = {
264 .type = BACKLIGHT_RAW,
265 .brightness = 255,
266 .max_brightness = 255,
267 };
268
269 return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
270 &tm5p5_nt35596_bl_ops, &props);
271}
272
273static int tm5p5_nt35596_probe(struct mipi_dsi_device *dsi)
274{
275 struct device *dev = &dsi->dev;
276 struct tm5p5_nt35596 *ctx;
277 int ret;
278
279 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
280 if (!ctx)
281 return -ENOMEM;
282
283 ctx->supplies[0].supply = "vdd";
284 ctx->supplies[1].supply = "vddio";
285 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
286 ctx->supplies);
287 if (ret < 0) {
288 dev_err(dev, "Failed to get regulators: %d\n", ret);
289 return ret;
290 }
291
292 ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
293 if (IS_ERR(ctx->reset_gpio)) {
294 ret = PTR_ERR(ctx->reset_gpio);
295 dev_err(dev, "Failed to get reset-gpios: %d\n", ret);
296 return ret;
297 }
298
299 ctx->dsi = dsi;
300 mipi_dsi_set_drvdata(dsi, ctx);
301
302 dsi->lanes = 4;
303 dsi->format = MIPI_DSI_FMT_RGB888;
304 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
305 MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_EOT_PACKET |
306 MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM;
307
308 drm_panel_init(&ctx->panel, dev, &tm5p5_nt35596_panel_funcs,
309 DRM_MODE_CONNECTOR_DSI);
310
311 ctx->panel.backlight = tm5p5_nt35596_create_backlight(dsi);
312 if (IS_ERR(ctx->panel.backlight)) {
313 ret = PTR_ERR(ctx->panel.backlight);
314 dev_err(dev, "Failed to create backlight: %d\n", ret);
315 return ret;
316 }
317
318 drm_panel_add(&ctx->panel);
319
320 ret = mipi_dsi_attach(dsi);
321 if (ret < 0) {
322 dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
323 return ret;
324 }
325
326 return 0;
327}
328
329static int tm5p5_nt35596_remove(struct mipi_dsi_device *dsi)
330{
331 struct tm5p5_nt35596 *ctx = mipi_dsi_get_drvdata(dsi);
332 int ret;
333
334 ret = mipi_dsi_detach(dsi);
335 if (ret < 0)
336 dev_err(&dsi->dev,
337 "Failed to detach from DSI host: %d\n", ret);
338
339 drm_panel_remove(&ctx->panel);
340
341 return 0;
342}
343
344static const struct of_device_id tm5p5_nt35596_of_match[] = {
345 { .compatible = "asus,z00t-tm5p5-n35596" },
346 { }
347};
348MODULE_DEVICE_TABLE(of, tm5p5_nt35596_of_match);
349
350static struct mipi_dsi_driver tm5p5_nt35596_driver = {
351 .probe = tm5p5_nt35596_probe,
352 .remove = tm5p5_nt35596_remove,
353 .driver = {
354 .name = "panel-tm5p5-nt35596",
355 .of_match_table = tm5p5_nt35596_of_match,
356 },
357};
358module_mipi_dsi_driver(tm5p5_nt35596_driver);
359
360MODULE_AUTHOR("Konrad Dybcio <konradybcio@gmail.com>");
361MODULE_DESCRIPTION("DRM driver for tm5p5 nt35596 1080p video mode dsi panel");
362MODULE_LICENSE("GPL v2");
363
