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
 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 = 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
232static 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
249static 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
254static struct backlight_device *
255tm5p5_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
268static 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
324static void 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
337static const struct of_device_id tm5p5_nt35596_of_match[] = {
338	{ .compatible = "asus,z00t-tm5p5-n35596" },
339	{ /* sentinel */ }
340};
341MODULE_DEVICE_TABLE(of, tm5p5_nt35596_of_match);
342
343static struct mipi_dsi_driver tm5p5_nt35596_driver = {
344	.probe = tm5p5_nt35596_probe,
345	.remove = tm5p5_nt35596_remove,
346	.driver = {
347		.name = "panel-tm5p5-nt35596",
348		.of_match_table = tm5p5_nt35596_of_match,
349	},
350};
351module_mipi_dsi_driver(tm5p5_nt35596_driver);
352
353MODULE_AUTHOR("Konrad Dybcio <konradybcio@gmail.com>");
354MODULE_DESCRIPTION("DRM driver for tm5p5 nt35596 1080p video mode dsi panel");
355MODULE_LICENSE("GPL v2");