1// SPDX-License-Identifier: GPL-2.0-only
  2/* Copyright (c) 2020 Caleb Connolly <caleb@connolly.tech>
  3 * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree:
  4 * Copyright (c) 2020, The Linux Foundation. All rights reserved.
  5 */
  6
  7#include <linux/delay.h>
  8#include <linux/gpio/consumer.h>
  9#include <linux/module.h>
 10#include <linux/of.h>
 11#include <linux/of_device.h>
 12#include <linux/regulator/consumer.h>
 13#include <linux/swab.h>
 14#include <linux/backlight.h>
 15
 16#include <video/mipi_display.h>
 17
 18#include <drm/drm_mipi_dsi.h>
 19#include <drm/drm_modes.h>
 20#include <drm/drm_panel.h>
 21
 22struct sofef00_panel {
 23	struct drm_panel panel;
 24	struct mipi_dsi_device *dsi;
 25	struct regulator *supply;
 26	struct gpio_desc *reset_gpio;
 27	const struct drm_display_mode *mode;
 28	bool prepared;
 29};
 30
 31static inline
 32struct sofef00_panel *to_sofef00_panel(struct drm_panel *panel)
 33{
 34	return container_of(panel, struct sofef00_panel, panel);
 35}
 36
 37#define dsi_dcs_write_seq(dsi, seq...) do {				\
 38		static const u8 d[] = { seq };				\
 39		int ret;						\
 40		ret = mipi_dsi_dcs_write_buffer(dsi, d, ARRAY_SIZE(d));	\
 41		if (ret < 0)						\
 42			return ret;					\
 43	} while (0)
 44
 45static void sofef00_panel_reset(struct sofef00_panel *ctx)
 46{
 47	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
 48	usleep_range(5000, 6000);
 49	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
 50	usleep_range(2000, 3000);
 51	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
 52	usleep_range(12000, 13000);
 53}
 54
 55static int sofef00_panel_on(struct sofef00_panel *ctx)
 56{
 57	struct mipi_dsi_device *dsi = ctx->dsi;
 58	struct device *dev = &dsi->dev;
 59	int ret;
 60
 61	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
 62
 63	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
 64	if (ret < 0) {
 65		dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
 66		return ret;
 67	}
 68	usleep_range(10000, 11000);
 69
 70	dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a);
 71
 72	ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
 73	if (ret < 0) {
 74		dev_err(dev, "Failed to set tear on: %d\n", ret);
 75		return ret;
 76	}
 77
 78	dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5);
 79	dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a);
 80	dsi_dcs_write_seq(dsi, 0xb0, 0x07);
 81	dsi_dcs_write_seq(dsi, 0xb6, 0x12);
 82	dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5);
 83	dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
 84	dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
 85
 86	ret = mipi_dsi_dcs_set_display_on(dsi);
 87	if (ret < 0) {
 88		dev_err(dev, "Failed to set display on: %d\n", ret);
 89		return ret;
 90	}
 91
 92	return 0;
 93}
 94
 95static int sofef00_panel_off(struct sofef00_panel *ctx)
 96{
 97	struct mipi_dsi_device *dsi = ctx->dsi;
 98	struct device *dev = &dsi->dev;
 99	int ret;
100
101	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
102
103	ret = mipi_dsi_dcs_set_display_off(dsi);
104	if (ret < 0) {
105		dev_err(dev, "Failed to set display off: %d\n", ret);
106		return ret;
107	}
108	msleep(40);
109
110	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
111	if (ret < 0) {
112		dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
113		return ret;
114	}
115	msleep(160);
116
117	return 0;
118}
119
120static int sofef00_panel_prepare(struct drm_panel *panel)
121{
122	struct sofef00_panel *ctx = to_sofef00_panel(panel);
123	struct device *dev = &ctx->dsi->dev;
124	int ret;
125
126	if (ctx->prepared)
127		return 0;
128
129	ret = regulator_enable(ctx->supply);
130	if (ret < 0) {
131		dev_err(dev, "Failed to enable regulator: %d\n", ret);
132		return ret;
133	}
134
135	sofef00_panel_reset(ctx);
136
137	ret = sofef00_panel_on(ctx);
138	if (ret < 0) {
139		dev_err(dev, "Failed to initialize panel: %d\n", ret);
140		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
141		return ret;
142	}
143
144	ctx->prepared = true;
145	return 0;
146}
147
148static int sofef00_panel_unprepare(struct drm_panel *panel)
149{
150	struct sofef00_panel *ctx = to_sofef00_panel(panel);
151	struct device *dev = &ctx->dsi->dev;
152	int ret;
153
154	if (!ctx->prepared)
155		return 0;
156
157	ret = sofef00_panel_off(ctx);
158	if (ret < 0)
159		dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
160
161	regulator_disable(ctx->supply);
162
163	ctx->prepared = false;
164	return 0;
165}
166
167static const struct drm_display_mode enchilada_panel_mode = {
168	.clock = (1080 + 112 + 16 + 36) * (2280 + 36 + 8 + 12) * 60 / 1000,
169	.hdisplay = 1080,
170	.hsync_start = 1080 + 112,
171	.hsync_end = 1080 + 112 + 16,
172	.htotal = 1080 + 112 + 16 + 36,
173	.vdisplay = 2280,
174	.vsync_start = 2280 + 36,
175	.vsync_end = 2280 + 36 + 8,
176	.vtotal = 2280 + 36 + 8 + 12,
177	.width_mm = 68,
178	.height_mm = 145,
179};
180
181static const struct drm_display_mode fajita_panel_mode = {
182	.clock = (1080 + 72 + 16 + 36) * (2340 + 32 + 4 + 18) * 60 / 1000,
183	.hdisplay = 1080,
184	.hsync_start = 1080 + 72,
185	.hsync_end = 1080 + 72 + 16,
186	.htotal = 1080 + 72 + 16 + 36,
187	.vdisplay = 2340,
188	.vsync_start = 2340 + 32,
189	.vsync_end = 2340 + 32 + 4,
190	.vtotal = 2340 + 32 + 4 + 18,
191	.width_mm = 68,
192	.height_mm = 145,
193};
194
195static int sofef00_panel_get_modes(struct drm_panel *panel, struct drm_connector *connector)
196{
197	struct drm_display_mode *mode;
198	struct sofef00_panel *ctx = to_sofef00_panel(panel);
199
200	mode = drm_mode_duplicate(connector->dev, ctx->mode);
201	if (!mode)
202		return -ENOMEM;
203
204	drm_mode_set_name(mode);
205
206	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
207	connector->display_info.width_mm = mode->width_mm;
208	connector->display_info.height_mm = mode->height_mm;
209	drm_mode_probed_add(connector, mode);
210
211	return 1;
212}
213
214static const struct drm_panel_funcs sofef00_panel_panel_funcs = {
215	.prepare = sofef00_panel_prepare,
216	.unprepare = sofef00_panel_unprepare,
217	.get_modes = sofef00_panel_get_modes,
218};
219
220static int sofef00_panel_bl_update_status(struct backlight_device *bl)
221{
222	struct mipi_dsi_device *dsi = bl_get_data(bl);
223	int err;
224	u16 brightness;
225
226	brightness = (u16)backlight_get_brightness(bl);
227	// This panel needs the high and low bytes swapped for the brightness value
228	brightness = __swab16(brightness);
229
230	err = mipi_dsi_dcs_set_display_brightness(dsi, brightness);
231	if (err < 0)
232		return err;
233
234	return 0;
235}
236
237static const struct backlight_ops sofef00_panel_bl_ops = {
238	.update_status = sofef00_panel_bl_update_status,
239};
240
241static struct backlight_device *
242sofef00_create_backlight(struct mipi_dsi_device *dsi)
243{
244	struct device *dev = &dsi->dev;
245	const struct backlight_properties props = {
246		.type = BACKLIGHT_PLATFORM,
247		.brightness = 1023,
248		.max_brightness = 1023,
249	};
250
251	return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
252					      &sofef00_panel_bl_ops, &props);
253}
254
255static int sofef00_panel_probe(struct mipi_dsi_device *dsi)
256{
257	struct device *dev = &dsi->dev;
258	struct sofef00_panel *ctx;
259	int ret;
260
261	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
262	if (!ctx)
263		return -ENOMEM;
264
265	ctx->mode = of_device_get_match_data(dev);
266
267	if (!ctx->mode) {
268		dev_err(dev, "Missing device mode\n");
269		return -ENODEV;
270	}
271
272	ctx->supply = devm_regulator_get(dev, "vddio");
273	if (IS_ERR(ctx->supply)) {
274		ret = PTR_ERR(ctx->supply);
275		dev_err(dev, "Failed to get vddio regulator: %d\n", ret);
276		return ret;
277	}
278
279	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
280	if (IS_ERR(ctx->reset_gpio)) {
281		ret = PTR_ERR(ctx->reset_gpio);
282		dev_warn(dev, "Failed to get reset-gpios: %d\n", ret);
283		return ret;
284	}
285
286	ctx->dsi = dsi;
287	mipi_dsi_set_drvdata(dsi, ctx);
288
289	dsi->lanes = 4;
290	dsi->format = MIPI_DSI_FMT_RGB888;
291
292	drm_panel_init(&ctx->panel, dev, &sofef00_panel_panel_funcs,
293		       DRM_MODE_CONNECTOR_DSI);
294
295	ctx->panel.backlight = sofef00_create_backlight(dsi);
296	if (IS_ERR(ctx->panel.backlight))
297		return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
298				     "Failed to create backlight\n");
299
300	drm_panel_add(&ctx->panel);
301
302	ret = mipi_dsi_attach(dsi);
303	if (ret < 0) {
304		dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
305		return ret;
306	}
307
308	return 0;
309}
310
311static int sofef00_panel_remove(struct mipi_dsi_device *dsi)
312{
313	struct sofef00_panel *ctx = mipi_dsi_get_drvdata(dsi);
314	int ret;
315
316	ret = mipi_dsi_detach(dsi);
317	if (ret < 0)
318		dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
319
320	drm_panel_remove(&ctx->panel);
321
322	return 0;
323}
324
325static const struct of_device_id sofef00_panel_of_match[] = {
326	{ // OnePlus 6 / enchilada
327		.compatible = "samsung,sofef00",
328		.data = &enchilada_panel_mode,
329	},
330	{ // OnePlus 6T / fajita
331		.compatible = "samsung,s6e3fc2x01",
332		.data = &fajita_panel_mode,
333	},
334	{ /* sentinel */ }
335};
336MODULE_DEVICE_TABLE(of, sofef00_panel_of_match);
337
338static struct mipi_dsi_driver sofef00_panel_driver = {
339	.probe = sofef00_panel_probe,
340	.remove = sofef00_panel_remove,
341	.driver = {
342		.name = "panel-oneplus6",
343		.of_match_table = sofef00_panel_of_match,
344	},
345};
346
347module_mipi_dsi_driver(sofef00_panel_driver);
348
349MODULE_AUTHOR("Caleb Connolly <caleb@connolly.tech>");
350MODULE_DESCRIPTION("DRM driver for Samsung AMOLED DSI panels found in OnePlus 6/6T phones");
351MODULE_LICENSE("GPL v2");