1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Synaptics R63353 Controller driver
  4 *
  5 * Copyright (C) 2020 BSH Hausgerate GmbH
  6 */
  7
  8#include <linux/delay.h>
  9#include <linux/device.h>
 10#include <linux/err.h>
 11#include <linux/errno.h>
 12#include <linux/kernel.h>
 13#include <linux/module.h>
 14#include <linux/of.h>
 15#include <linux/media-bus-format.h>
 16
 17#include <linux/gpio/consumer.h>
 18#include <linux/regulator/consumer.h>
 19
 20#include <drm/drm_mipi_dsi.h>
 21#include <drm/drm_modes.h>
 22#include <drm/drm_panel.h>
 23
 24#include <video/mipi_display.h>
 25
 26#define R63353_INSTR(...) { \
 27		.len = sizeof((u8[]) {__VA_ARGS__}), \
 28		.data = (u8[]){__VA_ARGS__} \
 29	}
 30
 31struct r63353_instr {
 32	size_t len;
 33	const u8 *data;
 34};
 35
 36static const struct r63353_instr sharp_ls068b3sx02_init[] = {
 37	R63353_INSTR(0x51, 0xff),
 38	R63353_INSTR(0x53, 0x0c),
 39	R63353_INSTR(0x55, 0x00),
 40	R63353_INSTR(0x84, 0x00),
 41	R63353_INSTR(0x29),
 42};
 43
 44struct r63353_desc {
 45	const char *name;
 46	const struct r63353_instr *init;
 47	const size_t init_length;
 48	const struct drm_display_mode *mode;
 49	u32 width_mm;
 50	u32 height_mm;
 51};
 52
 53struct r63353_panel {
 54	struct drm_panel base;
 55	struct mipi_dsi_device *dsi;
 56
 57	struct gpio_desc *reset_gpio;
 58	struct regulator *dvdd;
 59	struct regulator *avdd;
 60
 61	struct r63353_desc *pdata;
 62};
 63
 64static inline struct r63353_panel *to_r63353_panel(struct drm_panel *panel)
 65{
 66	return container_of(panel, struct r63353_panel, base);
 67}
 68
 69static int r63353_panel_power_on(struct r63353_panel *rpanel)
 70{
 71	struct mipi_dsi_device *dsi = rpanel->dsi;
 72	struct device *dev = &dsi->dev;
 73	int ret;
 74
 75	ret = regulator_enable(rpanel->avdd);
 76	if (ret) {
 77		dev_err(dev, "Failed to enable avdd regulator (%d)\n", ret);
 78		return ret;
 79	}
 80
 81	usleep_range(15000, 25000);
 82
 83	ret = regulator_enable(rpanel->dvdd);
 84	if (ret) {
 85		dev_err(dev, "Failed to enable dvdd regulator (%d)\n", ret);
 86		regulator_disable(rpanel->avdd);
 87		return ret;
 88	}
 89
 90	usleep_range(300000, 350000);
 91	gpiod_set_value(rpanel->reset_gpio, 1);
 92	usleep_range(15000, 25000);
 93
 94	return 0;
 95}
 96
 97static int r63353_panel_power_off(struct r63353_panel *rpanel)
 98{
 99	gpiod_set_value(rpanel->reset_gpio, 0);
100	regulator_disable(rpanel->dvdd);
101	regulator_disable(rpanel->avdd);
102
103	return 0;
104}
105
106static int r63353_panel_activate(struct r63353_panel *rpanel)
107{
108	struct mipi_dsi_device *dsi = rpanel->dsi;
109	struct device *dev = &dsi->dev;
110	int i, ret;
111
112	ret = mipi_dsi_dcs_soft_reset(dsi);
113	if (ret < 0) {
114		dev_err(dev, "Failed to do Software Reset (%d)\n", ret);
115		goto fail;
116	}
117
118	usleep_range(15000, 17000);
119
120	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
121	if (ret < 0) {
122		dev_err(dev, "Failed to enter sleep mode (%d)\n", ret);
123		goto fail;
124	}
125
126	for (i = 0; i < rpanel->pdata->init_length; i++) {
127		const struct r63353_instr *instr = &rpanel->pdata->init[i];
128
129		ret = mipi_dsi_dcs_write_buffer(dsi, instr->data, instr->len);
130		if (ret < 0)
131			goto fail;
132	}
133
134	msleep(120);
135
136	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
137	if (ret < 0) {
138		dev_err(dev, "Failed to exit sleep mode (%d)\n", ret);
139		goto fail;
140	}
141
142	usleep_range(5000, 10000);
143
144	ret = mipi_dsi_dcs_set_display_on(dsi);
145	if (ret < 0) {
146		dev_err(dev, "Failed to set display ON (%d)\n", ret);
147		goto fail;
148	}
149
150	return 0;
151
152fail:
153	gpiod_set_value(rpanel->reset_gpio, 0);
154
155	return ret;
156}
157
158static int r63353_panel_prepare(struct drm_panel *panel)
159{
160	struct r63353_panel *rpanel = to_r63353_panel(panel);
161	struct mipi_dsi_device *dsi = rpanel->dsi;
162	struct device *dev = &dsi->dev;
163	int ret;
164
165	dev_dbg(dev, "Preparing\n");
166
167	ret = r63353_panel_power_on(rpanel);
168	if (ret)
169		return ret;
170
171	ret = r63353_panel_activate(rpanel);
172	if (ret) {
173		r63353_panel_power_off(rpanel);
174		return ret;
175	}
176
177	dev_dbg(dev, "Prepared\n");
178	return 0;
179}
180
181static int r63353_panel_deactivate(struct r63353_panel *rpanel)
182{
183	struct mipi_dsi_device *dsi = rpanel->dsi;
184	struct device *dev = &dsi->dev;
185	int ret;
186
187	ret = mipi_dsi_dcs_set_display_off(dsi);
188	if (ret < 0) {
189		dev_err(dev, "Failed to set display OFF (%d)\n", ret);
190		return ret;
191	}
192
193	usleep_range(5000, 10000);
194
195	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
196	if (ret < 0) {
197		dev_err(dev, "Failed to enter sleep mode (%d)\n", ret);
198		return ret;
199	}
200
201	return 0;
202}
203
204static int r63353_panel_unprepare(struct drm_panel *panel)
205{
206	struct r63353_panel *rpanel = to_r63353_panel(panel);
207
208	r63353_panel_deactivate(rpanel);
209	r63353_panel_power_off(rpanel);
210
211	return 0;
212}
213
214static const struct drm_display_mode sharp_ls068b3sx02_timing = {
215	.clock = 70000,
216	.hdisplay = 640,
217	.hsync_start = 640 + 35,
218	.hsync_end = 640 + 35 + 2,
219	.htotal = 640 + 35 + 2 + 150,
220	.vdisplay = 1280,
221	.vsync_start = 1280 + 2,
222	.vsync_end = 1280 + 2 + 4,
223	.vtotal = 1280 + 2 + 4 + 0,
224};
225
226static int r63353_panel_get_modes(struct drm_panel *panel,
227				  struct drm_connector *connector)
228{
229	struct r63353_panel *rpanel = to_r63353_panel(panel);
230	struct drm_display_mode *mode;
231	static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
232
233	mode = drm_mode_duplicate(connector->dev, rpanel->pdata->mode);
234	if (!mode)
235		return -ENOMEM;
236
237	drm_mode_set_name(mode);
238	drm_mode_probed_add(connector, mode);
239
240	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
241	connector->display_info.width_mm = rpanel->pdata->width_mm;
242	connector->display_info.height_mm = rpanel->pdata->height_mm;
243
244	drm_display_info_set_bus_formats(&connector->display_info,
245					 &bus_format, 1);
246
247	return 1;
248}
249
250static const struct drm_panel_funcs r63353_panel_funcs = {
251	.prepare = r63353_panel_prepare,
252	.unprepare = r63353_panel_unprepare,
253	.get_modes = r63353_panel_get_modes,
254};
255
256static int r63353_panel_probe(struct mipi_dsi_device *dsi)
257{
258	int ret = 0;
259	struct device *dev = &dsi->dev;
260	struct r63353_panel *panel;
261
262	panel = devm_kzalloc(&dsi->dev, sizeof(*panel), GFP_KERNEL);
263	if (!panel)
264		return -ENOMEM;
265
266	mipi_dsi_set_drvdata(dsi, panel);
267	panel->dsi = dsi;
268	panel->pdata = (struct r63353_desc *)of_device_get_match_data(dev);
269
270	dev_info(dev, "Panel %s\n", panel->pdata->name);
271
272	dsi->lanes = 2;
273	dsi->format = MIPI_DSI_FMT_RGB888;
274	dsi->mode_flags = MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO |
275			  MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM |
276			  MIPI_DSI_MODE_VIDEO_SYNC_PULSE | MIPI_DSI_MODE_NO_EOT_PACKET;
277
278	panel->dvdd = devm_regulator_get(dev, "dvdd");
279	if (IS_ERR(panel->dvdd))
280		return PTR_ERR(panel->dvdd);
281	panel->avdd = devm_regulator_get(dev, "avdd");
282	if (IS_ERR(panel->avdd))
283		return PTR_ERR(panel->avdd);
284
285	panel->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
286	if (IS_ERR(panel->reset_gpio)) {
287		dev_err(dev, "failed to get RESET GPIO\n");
288		return PTR_ERR(panel->reset_gpio);
289	}
290
291	drm_panel_init(&panel->base, dev, &r63353_panel_funcs,
292		       DRM_MODE_CONNECTOR_DSI);
293
294	panel->base.prepare_prev_first = true;
295	ret = drm_panel_of_backlight(&panel->base);
296	if (ret)
297		return ret;
298
299	drm_panel_add(&panel->base);
300
301	ret = mipi_dsi_attach(dsi);
302	if (ret < 0) {
303		dev_err(dev, "mipi_dsi_attach failed: %d\n", ret);
304		drm_panel_remove(&panel->base);
305		return ret;
306	}
307
308	return ret;
309}
310
311static void r63353_panel_remove(struct mipi_dsi_device *dsi)
312{
313	struct r63353_panel *rpanel = mipi_dsi_get_drvdata(dsi);
314	struct device *dev = &dsi->dev;
315	int ret;
316
317	ret = mipi_dsi_detach(dsi);
318	if (ret < 0)
319		dev_err(dev, "Failed to detach from host (%d)\n", ret);
320
321	drm_panel_remove(&rpanel->base);
322}
323
324static void r63353_panel_shutdown(struct mipi_dsi_device *dsi)
325{
326	struct r63353_panel *rpanel = mipi_dsi_get_drvdata(dsi);
327
328	r63353_panel_unprepare(&rpanel->base);
329}
330
331static const struct r63353_desc sharp_ls068b3sx02_data = {
332	.name = "Sharp LS068B3SX02",
333	.mode = &sharp_ls068b3sx02_timing,
334	.init = sharp_ls068b3sx02_init,
335	.init_length = ARRAY_SIZE(sharp_ls068b3sx02_init),
336	.width_mm = 68,
337	.height_mm = 159,
338};
339
340static const struct of_device_id r63353_of_match[] = {
341	{ .compatible = "sharp,ls068b3sx02", .data = &sharp_ls068b3sx02_data },
342	{ }
343};
344
345MODULE_DEVICE_TABLE(of, r63353_of_match);
346
347static struct mipi_dsi_driver r63353_panel_driver = {
348	.driver = {
349		   .name = "r63353-dsi",
350		   .of_match_table = r63353_of_match,
351	},
352	.probe = r63353_panel_probe,
353	.remove = r63353_panel_remove,
354	.shutdown = r63353_panel_shutdown,
355};
356
357module_mipi_dsi_driver(r63353_panel_driver);
358
359MODULE_AUTHOR("Matthias Proske <Matthias.Proske@bshg.com>");
360MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
361MODULE_DESCRIPTION("Synaptics R63353 Controller Driver");
362MODULE_LICENSE("GPL");