panel-lincolntech-lcd197.c

  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Copyright (C) 2024 BayLibre, SAS
  4 * Author: Jerome Brunet <jbrunet@baylibre.com>
  5 */
  6
  7#include <linux/gpio/consumer.h>
  8#include <linux/module.h>
  9#include <linux/of.h>
 10#include <linux/regulator/consumer.h>
 11
 12#include <video/mipi_display.h>
 13
 14#include <drm/drm_device.h>
 15#include <drm/drm_probe_helper.h>
 16#include <drm/drm_mipi_dsi.h>
 17#include <drm/drm_modes.h>
 18#include <drm/drm_panel.h>
 19
 20struct lincoln_lcd197_panel {
 21	struct drm_panel panel;
 22	struct mipi_dsi_device *dsi;
 23	struct regulator *supply;
 24	struct gpio_desc *enable_gpio;
 25	struct gpio_desc *reset_gpio;
 26};
 27
 28static inline
 29struct lincoln_lcd197_panel *to_lincoln_lcd197_panel(struct drm_panel *panel)
 30{
 31	return container_of(panel, struct lincoln_lcd197_panel, panel);
 32}
 33
 34static int lincoln_lcd197_panel_prepare(struct drm_panel *panel)
 35{
 36	struct lincoln_lcd197_panel *lcd = to_lincoln_lcd197_panel(panel);
 37	struct mipi_dsi_multi_context ctx = { .dsi = lcd->dsi };
 38	int err;
 39
 40	gpiod_set_value_cansleep(lcd->enable_gpio, 0);
 41	err = regulator_enable(lcd->supply);
 42	if (err < 0)
 43		return err;
 44
 45	gpiod_set_value_cansleep(lcd->enable_gpio, 1);
 46	usleep_range(1000, 2000);
 47	gpiod_set_value_cansleep(lcd->reset_gpio, 1);
 48	usleep_range(5000, 6000);
 49	gpiod_set_value_cansleep(lcd->reset_gpio, 0);
 50	msleep(50);
 51
 52	mipi_dsi_dcs_write_seq_multi(&ctx, 0xb9, 0xff, 0x83, 0x99);
 53	mipi_dsi_dcs_write_seq_multi(&ctx, 0xd2, 0x55);
 54	mipi_dsi_dcs_write_seq_multi(&ctx, 0xb1, 0x02, 0x04, 0x70, 0x90, 0x01,
 55			       0x32, 0x33, 0x11, 0x11, 0x4d, 0x57, 0x56, 0x73,
 56			       0x02, 0x02);
 57	mipi_dsi_dcs_write_seq_multi(&ctx, 0xb2, 0x00, 0x80, 0x80, 0xae, 0x0a,
 58			       0x0e, 0x75, 0x11, 0x00, 0x00, 0x00);
 59	mipi_dsi_dcs_write_seq_multi(&ctx, 0xb4, 0x00, 0xff, 0x04, 0xa4, 0x02,
 60			       0xa0, 0x00, 0x00, 0x10, 0x00, 0x00, 0x02, 0x00,
 61			       0x24, 0x02, 0x04, 0x0a, 0x21, 0x03, 0x00, 0x00,
 62			       0x08, 0xa6, 0x88, 0x04, 0xa4, 0x02, 0xa0, 0x00,
 63			       0x00, 0x10, 0x00, 0x00, 0x02, 0x00, 0x24, 0x02,
 64			       0x04, 0x0a, 0x00, 0x00, 0x08, 0xa6, 0x00, 0x08,
 65			       0x11);
 66	mipi_dsi_dcs_write_seq_multi(&ctx, 0xd3, 0x00, 0x00, 0x00, 0x00, 0x00,
 67			       0x00, 0x18, 0x18, 0x32, 0x10, 0x09, 0x00, 0x09,
 68			       0x32, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 69			       0x00, 0x00, 0x11, 0x00, 0x02, 0x02, 0x03, 0x00,
 70			       0x00, 0x00, 0x0a, 0x40);
 71	mipi_dsi_dcs_write_seq_multi(&ctx, 0xd5, 0x18, 0x18, 0x18, 0x18, 0x21,
 72			       0x20, 0x18, 0x18, 0x19, 0x19, 0x19, 0x19, 0x18,
 73			       0x18, 0x18, 0x18, 0x03, 0x02, 0x01, 0x00, 0x2f,
 74			       0x2f, 0x30, 0x30, 0x31, 0x31, 0x18, 0x18, 0x18,
 75			       0x18, 0x18, 0x18);
 76	mipi_dsi_dcs_write_seq_multi(&ctx, 0xd6, 0x18, 0x18, 0x18, 0x18, 0x20,
 77			       0x21, 0x19, 0x19, 0x18, 0x18, 0x19, 0x19, 0x18,
 78			       0x18, 0x18, 0x18, 0x00, 0x01, 0x02, 0x03, 0x2f,
 79			       0x2f, 0x30, 0x30, 0x31, 0x31, 0x18, 0x18, 0x18,
 80			       0x18, 0x18, 0x18);
 81	mipi_dsi_dcs_write_seq_multi(&ctx, 0xbd, 0x01);
 82	mipi_dsi_dcs_write_seq_multi(&ctx, 0xd8, 0x0a, 0xbe, 0xfa, 0xa0, 0x0a,
 83			       0xbe, 0xfa, 0xa0);
 84	mipi_dsi_dcs_write_seq_multi(&ctx, 0xd8, 0x0f, 0xff, 0xff, 0xe0, 0x0f,
 85			       0xff, 0xff, 0xe0);
 86	mipi_dsi_dcs_write_seq_multi(&ctx, 0xbd, 0x02);
 87	mipi_dsi_dcs_write_seq_multi(&ctx, 0xd8, 0x0f, 0xff, 0xff, 0xe0, 0x0f,
 88			       0xff, 0xff, 0xe0);
 89	mipi_dsi_dcs_write_seq_multi(&ctx, 0xe0, 0x01, 0x11, 0x1c, 0x17, 0x39,
 90			       0x43, 0x54, 0x51, 0x5a, 0x64, 0x6c, 0x74, 0x7a,
 91			       0x83, 0x8d, 0x92, 0x99, 0xa4, 0xa9, 0xb4, 0xaa,
 92			       0xba, 0xbe, 0x63, 0x5e, 0x69, 0x73, 0x01, 0x11,
 93			       0x1c, 0x17, 0x39, 0x43, 0x54, 0x51, 0x5a, 0x64,
 94			       0x6c, 0x74, 0x7a, 0x83, 0x8d, 0x92, 0x99, 0xa4,
 95			       0xa7, 0xb2, 0xa9, 0xba, 0xbe, 0x63, 0x5e, 0x69,
 96			       0x73);
 97	mipi_dsi_usleep_range(&ctx, 200, 300);
 98	mipi_dsi_dcs_write_seq_multi(&ctx, 0xb6, 0x92, 0x92);
 99	mipi_dsi_dcs_write_seq_multi(&ctx, 0xcc, 0x00);
100	mipi_dsi_dcs_write_seq_multi(&ctx, 0xbf, 0x40, 0x41, 0x50, 0x49);
101	mipi_dsi_dcs_write_seq_multi(&ctx, 0xc6, 0xff, 0xf9);
102	mipi_dsi_dcs_write_seq_multi(&ctx, 0xc0, 0x25, 0x5a);
103	mipi_dsi_dcs_write_seq_multi(&ctx, MIPI_DCS_SET_ADDRESS_MODE, 0x02);
104	mipi_dsi_dcs_exit_sleep_mode_multi(&ctx);
105	mipi_dsi_msleep(&ctx, 120);
106
107	if (ctx.accum_err) {
108		gpiod_set_value_cansleep(lcd->enable_gpio, 0);
109		gpiod_set_value_cansleep(lcd->reset_gpio, 1);
110		regulator_disable(lcd->supply);
111	}
112
113	return ctx.accum_err;
114}
115
116static int lincoln_lcd197_panel_unprepare(struct drm_panel *panel)
117{
118	struct lincoln_lcd197_panel *lcd = to_lincoln_lcd197_panel(panel);
119	struct mipi_dsi_multi_context ctx = { .dsi = lcd->dsi };
120
121	mipi_dsi_dcs_enter_sleep_mode_multi(&ctx);
122	mipi_dsi_usleep_range(&ctx, 5000, 6000);
123	gpiod_set_value_cansleep(lcd->enable_gpio, 0);
124	gpiod_set_value_cansleep(lcd->reset_gpio, 1);
125	regulator_disable(lcd->supply);
126
127	return ctx.accum_err;
128}
129
130static int lincoln_lcd197_panel_enable(struct drm_panel *panel)
131{
132	struct lincoln_lcd197_panel *lcd = to_lincoln_lcd197_panel(panel);
133	struct mipi_dsi_multi_context ctx = { .dsi = lcd->dsi };
134
135	mipi_dsi_dcs_set_display_on_multi(&ctx);
136	mipi_dsi_msleep(&ctx, 20);
137
138	return ctx.accum_err;
139}
140
141static int lincoln_lcd197_panel_disable(struct drm_panel *panel)
142{
143	struct lincoln_lcd197_panel *lcd = to_lincoln_lcd197_panel(panel);
144	struct mipi_dsi_multi_context ctx = { .dsi = lcd->dsi };
145
146	mipi_dsi_dcs_set_display_off_multi(&ctx);
147	mipi_dsi_msleep(&ctx, 50);
148
149	return ctx.accum_err;
150}
151
152static const struct drm_display_mode lcd197_mode = {
153	.clock = 154002,
154	.hdisplay = 1080,
155	.hsync_start = 1080 + 20,
156	.hsync_end = 1080 + 20 + 6,
157	.htotal = 1080 + 204,
158	.vdisplay = 1920,
159	.vsync_start = 1920 + 4,
160	.vsync_end = 1920 + 4 + 4,
161	.vtotal = 1920 + 79,
162	.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
163	.width_mm = 79,
164	.height_mm = 125,
165	.type = DRM_MODE_TYPE_DRIVER,
166};
167
168static int lincoln_lcd197_panel_get_modes(struct drm_panel *panel,
169					  struct drm_connector *connector)
170{
171	return drm_connector_helper_get_modes_fixed(connector, &lcd197_mode);
172}
173
174static const struct drm_panel_funcs lincoln_lcd197_panel_funcs = {
175	.prepare = lincoln_lcd197_panel_prepare,
176	.unprepare = lincoln_lcd197_panel_unprepare,
177	.enable = lincoln_lcd197_panel_enable,
178	.disable = lincoln_lcd197_panel_disable,
179	.get_modes = lincoln_lcd197_panel_get_modes,
180};
181
182static int lincoln_lcd197_panel_probe(struct mipi_dsi_device *dsi)
183{
184	struct lincoln_lcd197_panel *lcd;
185	struct device *dev = &dsi->dev;
186	int err;
187
188	dsi->lanes = 4;
189	dsi->format = MIPI_DSI_FMT_RGB888;
190	dsi->mode_flags = (MIPI_DSI_MODE_VIDEO |
191			   MIPI_DSI_MODE_VIDEO_BURST);
192
193	lcd = devm_drm_panel_alloc(dev, struct lincoln_lcd197_panel, panel,
194				   &lincoln_lcd197_panel_funcs,
195				   DRM_MODE_CONNECTOR_DSI);
196	if (IS_ERR(lcd))
197		return PTR_ERR(lcd);
198
199	mipi_dsi_set_drvdata(dsi, lcd);
200	lcd->dsi = dsi;
201
202	lcd->supply = devm_regulator_get(dev, "power");
203	if (IS_ERR(lcd->supply))
204		return dev_err_probe(dev, PTR_ERR(lcd->supply),
205				     "failed to get power supply");
206
207	lcd->enable_gpio = devm_gpiod_get(dev, "enable",
208					  GPIOD_OUT_HIGH);
209	if (IS_ERR(lcd->enable_gpio))
210		return dev_err_probe(dev, PTR_ERR(lcd->enable_gpio),
211				     "failed to get enable gpio");
212
213	lcd->reset_gpio = devm_gpiod_get(dev, "reset",
214					  GPIOD_OUT_HIGH);
215	if (IS_ERR(lcd->reset_gpio))
216		return dev_err_probe(dev, PTR_ERR(lcd->reset_gpio),
217				     "failed to get reset gpio");
218
219	err = drm_panel_of_backlight(&lcd->panel);
220	if (err)
221		return err;
222
223	drm_panel_add(&lcd->panel);
224	err = mipi_dsi_attach(dsi);
225	if (err)
226		drm_panel_remove(&lcd->panel);
227
228	return err;
229}
230
231static void lincoln_lcd197_panel_remove(struct mipi_dsi_device *dsi)
232{
233	struct lincoln_lcd197_panel *lcd = mipi_dsi_get_drvdata(dsi);
234	int err;
235
236	err = mipi_dsi_detach(dsi);
237	if (err < 0)
238		dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
239
240	drm_panel_remove(&lcd->panel);
241}
242
243static const struct of_device_id lincoln_lcd197_of_match[] = {
244	{ .compatible = "lincolntech,lcd197", },
245	{ /* sentinel */ }
246};
247MODULE_DEVICE_TABLE(of, lincoln_lcd197_of_match);
248
249static struct mipi_dsi_driver lincoln_lcd197_panel_driver = {
250	.driver = {
251		.name = "panel-lincolntech-lcd197",
252		.of_match_table = lincoln_lcd197_of_match,
253	},
254	.probe = lincoln_lcd197_panel_probe,
255	.remove = lincoln_lcd197_panel_remove,
256};
257module_mipi_dsi_driver(lincoln_lcd197_panel_driver);
258
259MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
260MODULE_DESCRIPTION("Lincoln Technologies LCD197 panel driver");
261MODULE_LICENSE("GPL");