panel-synaptics-r63353.c

  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 mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
110	int i;
111
112	mipi_dsi_dcs_soft_reset_multi(&dsi_ctx);
113
114	mipi_dsi_usleep_range(&dsi_ctx, 15000, 17000);
115
116	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
117
118	for (i = 0; i < rpanel->pdata->init_length; i++) {
119		const struct r63353_instr *instr = &rpanel->pdata->init[i];
120
121		mipi_dsi_dcs_write_buffer_multi(&dsi_ctx, instr->data,
122						instr->len);
123	}
124
125	mipi_dsi_msleep(&dsi_ctx, 120);
126
127	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
128
129	mipi_dsi_usleep_range(&dsi_ctx, 5000, 10000);
130
131	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
132
133	if (dsi_ctx.accum_err)
134		gpiod_set_value(rpanel->reset_gpio, 0);
135
136	return dsi_ctx.accum_err;
137}
138
139static int r63353_panel_prepare(struct drm_panel *panel)
140{
141	struct r63353_panel *rpanel = to_r63353_panel(panel);
142	struct mipi_dsi_device *dsi = rpanel->dsi;
143	struct device *dev = &dsi->dev;
144	int ret;
145
146	dev_dbg(dev, "Preparing\n");
147
148	ret = r63353_panel_power_on(rpanel);
149	if (ret)
150		return ret;
151
152	ret = r63353_panel_activate(rpanel);
153	if (ret) {
154		r63353_panel_power_off(rpanel);
155		return ret;
156	}
157
158	dev_dbg(dev, "Prepared\n");
159	return 0;
160}
161
162static void r63353_panel_deactivate(struct r63353_panel *rpanel)
163{
164	struct mipi_dsi_device *dsi = rpanel->dsi;
165	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
166
167	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
168
169	mipi_dsi_usleep_range(&dsi_ctx, 5000, 10000);
170
171	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
172}
173
174static int r63353_panel_unprepare(struct drm_panel *panel)
175{
176	struct r63353_panel *rpanel = to_r63353_panel(panel);
177
178	r63353_panel_deactivate(rpanel);
179	r63353_panel_power_off(rpanel);
180
181	return 0;
182}
183
184static const struct drm_display_mode sharp_ls068b3sx02_timing = {
185	.clock = 70000,
186	.hdisplay = 640,
187	.hsync_start = 640 + 35,
188	.hsync_end = 640 + 35 + 2,
189	.htotal = 640 + 35 + 2 + 150,
190	.vdisplay = 1280,
191	.vsync_start = 1280 + 2,
192	.vsync_end = 1280 + 2 + 4,
193	.vtotal = 1280 + 2 + 4 + 0,
194};
195
196static int r63353_panel_get_modes(struct drm_panel *panel,
197				  struct drm_connector *connector)
198{
199	struct r63353_panel *rpanel = to_r63353_panel(panel);
200	struct drm_display_mode *mode;
201	static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
202
203	mode = drm_mode_duplicate(connector->dev, rpanel->pdata->mode);
204	if (!mode)
205		return -ENOMEM;
206
207	drm_mode_set_name(mode);
208	drm_mode_probed_add(connector, mode);
209
210	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
211	connector->display_info.width_mm = rpanel->pdata->width_mm;
212	connector->display_info.height_mm = rpanel->pdata->height_mm;
213
214	drm_display_info_set_bus_formats(&connector->display_info,
215					 &bus_format, 1);
216
217	return 1;
218}
219
220static const struct drm_panel_funcs r63353_panel_funcs = {
221	.prepare = r63353_panel_prepare,
222	.unprepare = r63353_panel_unprepare,
223	.get_modes = r63353_panel_get_modes,
224};
225
226static int r63353_panel_probe(struct mipi_dsi_device *dsi)
227{
228	int ret = 0;
229	struct device *dev = &dsi->dev;
230	struct r63353_panel *panel;
231
232	panel = devm_drm_panel_alloc(dev, struct r63353_panel, base,
233				     &r63353_panel_funcs,
234				     DRM_MODE_CONNECTOR_DSI);
235	if (IS_ERR(panel))
236		return PTR_ERR(panel);
237
238	mipi_dsi_set_drvdata(dsi, panel);
239	panel->dsi = dsi;
240	panel->pdata = (struct r63353_desc *)of_device_get_match_data(dev);
241
242	dev_info(dev, "Panel %s\n", panel->pdata->name);
243
244	dsi->lanes = 2;
245	dsi->format = MIPI_DSI_FMT_RGB888;
246	dsi->mode_flags = MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO |
247			  MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM |
248			  MIPI_DSI_MODE_VIDEO_SYNC_PULSE | MIPI_DSI_MODE_NO_EOT_PACKET;
249
250	panel->dvdd = devm_regulator_get(dev, "dvdd");
251	if (IS_ERR(panel->dvdd))
252		return PTR_ERR(panel->dvdd);
253	panel->avdd = devm_regulator_get(dev, "avdd");
254	if (IS_ERR(panel->avdd))
255		return PTR_ERR(panel->avdd);
256
257	panel->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
258	if (IS_ERR(panel->reset_gpio)) {
259		dev_err(dev, "failed to get RESET GPIO\n");
260		return PTR_ERR(panel->reset_gpio);
261	}
262
263	panel->base.prepare_prev_first = true;
264	ret = drm_panel_of_backlight(&panel->base);
265	if (ret)
266		return ret;
267
268	drm_panel_add(&panel->base);
269
270	ret = mipi_dsi_attach(dsi);
271	if (ret < 0) {
272		dev_err(dev, "mipi_dsi_attach failed: %d\n", ret);
273		drm_panel_remove(&panel->base);
274		return ret;
275	}
276
277	return ret;
278}
279
280static void r63353_panel_remove(struct mipi_dsi_device *dsi)
281{
282	struct r63353_panel *rpanel = mipi_dsi_get_drvdata(dsi);
283	struct device *dev = &dsi->dev;
284	int ret;
285
286	ret = mipi_dsi_detach(dsi);
287	if (ret < 0)
288		dev_err(dev, "Failed to detach from host (%d)\n", ret);
289
290	drm_panel_remove(&rpanel->base);
291}
292
293static void r63353_panel_shutdown(struct mipi_dsi_device *dsi)
294{
295	struct r63353_panel *rpanel = mipi_dsi_get_drvdata(dsi);
296
297	drm_panel_unprepare(&rpanel->base);
298}
299
300static const struct r63353_desc sharp_ls068b3sx02_data = {
301	.name = "Sharp LS068B3SX02",
302	.mode = &sharp_ls068b3sx02_timing,
303	.init = sharp_ls068b3sx02_init,
304	.init_length = ARRAY_SIZE(sharp_ls068b3sx02_init),
305	.width_mm = 68,
306	.height_mm = 159,
307};
308
309static const struct of_device_id r63353_of_match[] = {
310	{ .compatible = "sharp,ls068b3sx02", .data = &sharp_ls068b3sx02_data },
311	{ }
312};
313
314MODULE_DEVICE_TABLE(of, r63353_of_match);
315
316static struct mipi_dsi_driver r63353_panel_driver = {
317	.driver = {
318		   .name = "r63353-dsi",
319		   .of_match_table = r63353_of_match,
320	},
321	.probe = r63353_panel_probe,
322	.remove = r63353_panel_remove,
323	.shutdown = r63353_panel_shutdown,
324};
325
326module_mipi_dsi_driver(r63353_panel_driver);
327
328MODULE_AUTHOR("Matthias Proske <Matthias.Proske@bshg.com>");
329MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
330MODULE_DESCRIPTION("Synaptics R63353 Controller Driver");
331MODULE_LICENSE("GPL");